From Chiranmoy.Bhattacharya at fujitsu.com  Wed Dec  3 06:18:58 2025
From: Chiranmoy.Bhattacharya at fujitsu.com (Chiranmoy.Bhattacharya at fujitsu.com)
Date: Wed, 3 Dec 2025 06:18:58 +0000
Subject: Exploring Opportunities to Speed Up Vector API Performance on
 AArch64
In-Reply-To: <OS9PR01MB15185B140150A65C7891A46E897C7A@OS9PR01MB15185.jpnprd01.prod.outlook.com>
References: <DS0PR12MB8293E0F1AED1EB959008E891DEC7A@DS0PR12MB8293.namprd12.prod.outlook.com>
 <OS9PR01MB15185B140150A65C7891A46E897C7A@OS9PR01MB15185.jpnprd01.prod.outlook.com>
Message-ID: <OS9PR01MB15185F8481C026F845D5D03AE97D9A@OS9PR01MB15185.jpnprd01.prod.outlook.com>

Hi all,

The issue got resolved after the PR https://github.com/openjdk/jdk/pull/27481 got merged recently. The performance of the benchmarks are now acceptable on machines with SVE2.

Thank you for the support.

-------
Chiranmoy
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From duke at openjdk.org  Fri Dec  5 11:13:27 2025
From: duke at openjdk.org (duke)
Date: Fri, 5 Dec 2025 11:13:27 GMT
Subject: git: openjdk/panama-foreign: foreign-memaccess+abi: 138 new changesets
Message-ID: <5f1ea8c0-b18b-4ce6-8595-ba531d480bf9@openjdk.org>

Changeset: 78b155b2
Branch: foreign-memaccess+abi
Author:    Volkan Yazici <vyazici at openjdk.org>
Date:      2025-11-28 12:05:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/78b155b2b5745fc88c13586f93b632f61e038a94

8372147: ConnectionFlowControlTest should use HttpResponse.connectionLabel()

Reviewed-by: dfuchs

! test/jdk/java/net/httpclient/http2/ConnectionFlowControlTest.java

Changeset: e071afbf
Branch: foreign-memaccess+abi
Author:    Afshin Zafari <azafari at openjdk.org>
Date:      2025-11-28 13:02:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e071afbfe4507b6b3a306f90bb645465fdab0070

8351334: [ubsan] memoryReserver.cpp:552:60: runtime error: applying non-zero offset 1073741824 to null pointer

Reviewed-by: aboldtch, dholmes, jsjolen

! src/hotspot/share/gc/shared/jvmFlagConstraintsGC.cpp
! src/hotspot/share/memory/memoryReserver.cpp
! src/hotspot/share/runtime/arguments.cpp

Changeset: 52568bf4
Branch: foreign-memaccess+abi
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-11-28 22:50:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/52568bf4832b2bcc5dc547dbdf45a6a7172281fb

8372650: Convert GenericWaitBarrier to use Atomic<T>

Reviewed-by: shade, iwalulya

! src/hotspot/share/utilities/waitBarrier_generic.cpp
! src/hotspot/share/utilities/waitBarrier_generic.hpp

Changeset: 92e1357d
Branch: foreign-memaccess+abi
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-11-29 01:25:25 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/92e1357dfd2d874ef1a62ddd69c86a7bb189c6a2

8371802: Do not let QUIC connection to idle terminate when HTTP/3 is configured with a higher idle timeout

Reviewed-by: dfuchs

! src/java.net.http/share/classes/jdk/internal/net/http/Http3Connection.java
! src/java.net.http/share/classes/jdk/internal/net/http/Http3ConnectionPool.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/ConnectionTerminator.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/ConnectionTerminatorImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/IdleTimeoutManager.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicTimedEvent.java
+ test/jdk/java/net/httpclient/http3/H3IdleExceedsQuicIdleTimeout.java

Changeset: 282f3394
Branch: foreign-memaccess+abi
Author:    Lance Andersen <lancea at openjdk.org>
Date:      2025-11-30 12:53:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/282f339406d67d189e06c0bf8c7ca8d8cf5774e0

8369432: Add Support for JDBC 4.5 MR

Reviewed-by: alanb, rriggs

! src/java.sql/share/classes/java/sql/Array.java
! src/java.sql/share/classes/java/sql/Blob.java
! src/java.sql/share/classes/java/sql/Clob.java
! src/java.sql/share/classes/java/sql/Connection.java
! src/java.sql/share/classes/java/sql/DriverPropertyInfo.java
! src/java.sql/share/classes/java/sql/JDBCType.java
! src/java.sql/share/classes/java/sql/NClob.java
! src/java.sql/share/classes/java/sql/SQLPermission.java
+ src/java.sql/share/classes/java/sql/SQLUtils.java
! src/java.sql/share/classes/java/sql/SQLXML.java
! src/java.sql/share/classes/java/sql/Statement.java
! src/java.sql/share/classes/java/sql/Timestamp.java
! src/java.sql/share/classes/java/sql/Types.java
! src/java.sql/share/classes/java/sql/package-info.java
! test/jdk/java/sql/testng/test/sql/CallableStatementTests.java
+ test/jdk/java/sql/testng/test/sql/ConnectionTests.java
! test/jdk/java/sql/testng/test/sql/PreparedStatementTests.java
! test/jdk/java/sql/testng/test/sql/StatementTests.java
! test/jdk/java/sql/testng/test/sql/TimestampTests.java
! test/jdk/java/sql/testng/util/BaseTest.java
! test/jdk/java/sql/testng/util/StubCallableStatement.java
! test/jdk/java/sql/testng/util/StubConnection.java
+ test/jdk/java/sql/testng/util/StubDatabaseMetaData.java
! test/jdk/java/sql/testng/util/StubPreparedStatement.java
! test/jdk/java/sql/testng/util/StubStatement.java
! test/jdk/javax/sql/testng/test/rowset/serial/SQLInputImplTests.java
! test/jdk/javax/sql/testng/test/rowset/serial/SQLOutputImplTests.java

Changeset: 3fd551f9
Branch: foreign-memaccess+abi
Author:    SendaoYan <syan at openjdk.org>
Date:      2025-12-01 02:29:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3fd551f9926601b05a13a22b556d55425a37ee4d

8371769: TestMemoryInvisibleParent.java fails with java.nio.file.AccessDeniedException

Reviewed-by: sgehwolf, shade

! test/hotspot/jtreg/containers/docker/TestMemoryInvisibleParent.java

Changeset: c7a489db
Branch: foreign-memaccess+abi
Author:    Jayathirth D V <jdv at openjdk.org>
Date:      2025-12-01 05:40:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c7a489db9e4a7d696623fc2155a5504d9d2adb0d

8372534: Update Libpng to 1.6.51

Reviewed-by: serb, azvegint, prr

! make/modules/java.desktop/lib/ClientLibraries.gmk
! src/java.desktop/share/legal/libpng.md
! src/java.desktop/share/native/libsplashscreen/libpng/CHANGES
! src/java.desktop/share/native/libsplashscreen/libpng/README
! src/java.desktop/share/native/libsplashscreen/libpng/png.c
! src/java.desktop/share/native/libsplashscreen/libpng/png.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngconf.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngdebug.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngerror.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngget.c
! src/java.desktop/share/native/libsplashscreen/libpng/pnginfo.h
! src/java.desktop/share/native/libsplashscreen/libpng/pnglibconf.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngmem.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngpread.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngpriv.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngread.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrio.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrtran.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrutil.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngset.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngstruct.h

Changeset: e0311ecb
Branch: foreign-memaccess+abi
Author:    Jatin Bhateja <jbhateja at openjdk.org>
Date:      2025-12-01 06:04:23 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e0311ecb85b78b6d97387c17102a8b6759eefc36

8351016: RA support for EVEX to REX/REX2 demotion to optimize NDD instructions

Reviewed-by: sviswanathan, dlunden, vlivanov, qamai

! src/hotspot/cpu/aarch64/aarch64.ad
! src/hotspot/cpu/arm/arm.ad
! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/cpu/riscv/riscv.ad
! src/hotspot/cpu/s390/s390.ad
! src/hotspot/cpu/x86/x86.ad
! src/hotspot/share/opto/chaitin.cpp
! src/hotspot/share/opto/chaitin.hpp
! src/hotspot/share/opto/idealGraphPrinter.cpp
! src/hotspot/share/opto/machnode.cpp
! src/hotspot/share/opto/machnode.hpp
! src/hotspot/share/opto/matcher.hpp
! src/hotspot/share/opto/node.hpp

Changeset: 81b26ba8
Branch: foreign-memaccess+abi
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-01 06:42:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/81b26ba8131b74a7bb4309bd3608dda2ba99a6ca

8372685: C2 SuperWord: wrong requires in test after JDK-8371146

Reviewed-by: chagedorn, mbaesken

! test/hotspot/jtreg/compiler/loopopts/superword/TestAliasingCheckPreLimitNotAvailable.java

Changeset: ca96366c
Branch: foreign-memaccess+abi
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-01 06:51:03 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ca96366c03b89fa90a015e6c2d5912a9f2554c92

8372528: Unify atomic exchange and compare exchange

Reviewed-by: kbarrett, stefank

! src/hotspot/cpu/ppc/atomicAccess_ppc.hpp
! src/hotspot/os_cpu/bsd_aarch64/atomicAccess_bsd_aarch64.hpp
! src/hotspot/os_cpu/bsd_x86/atomicAccess_bsd_x86.hpp
! src/hotspot/os_cpu/bsd_zero/atomicAccess_bsd_zero.hpp
! src/hotspot/os_cpu/linux_aarch64/atomicAccess_linux_aarch64.hpp
! src/hotspot/os_cpu/linux_arm/atomicAccess_linux_arm.hpp
! src/hotspot/os_cpu/linux_riscv/atomicAccess_linux_riscv.hpp
! src/hotspot/os_cpu/linux_s390/atomicAccess_linux_s390.hpp
! src/hotspot/os_cpu/linux_x86/atomicAccess_linux_x86.hpp
! src/hotspot/os_cpu/linux_zero/atomicAccess_linux_zero.hpp
! src/hotspot/os_cpu/windows_aarch64/atomicAccess_windows_aarch64.hpp
! src/hotspot/os_cpu/windows_x86/atomicAccess_windows_x86.hpp
! src/hotspot/share/runtime/atomic.hpp
! src/hotspot/share/runtime/atomicAccess.hpp
! test/hotspot/gtest/runtime/test_atomic.cpp
! test/hotspot/gtest/runtime/test_atomicAccess.cpp

Changeset: 293fec7e
Branch: foreign-memaccess+abi
Author:    Christian Hagedorn <chagedorn at openjdk.org>
Date:      2025-12-01 07:06:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/293fec7e28ed06f0942e94b1c21affdf6aabe9ca

8372461: [IR Framework] Multiple test failures after JDK-8371789

Reviewed-by: epeter, syan, dfenacci

! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
! test/hotspot/jtreg/testlibrary_tests/ir_framework/tests/TestIRMatching.java

Changeset: a6bc9b3b
Branch: foreign-memaccess+abi
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-01 07:44:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a6bc9b3ba50c5d669213f082a32e30c9ab2f923d

8372588: [asan] serviceability/sa/TestJmapCore.java and TestJmapCoreMetaspace.java fail after recent improvements

Reviewed-by: stuefe, azeller, lucy

! test/hotspot/jtreg/serviceability/sa/TestJmapCore.java
! test/hotspot/jtreg/serviceability/sa/TestJmapCoreMetaspace.java

Changeset: 969eb1ce
Branch: foreign-memaccess+abi
Author:    Mikhail Yankelevich <myankelevich at openjdk.org>
Date:      2025-12-01 07:51:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/969eb1ce2419324582ee8d8108031323f82e125e

8365861: test/jdk/sun/security/pkcs11/Provider/ tests skipped without SkippedException

Reviewed-by: rhalade

! test/jdk/sun/security/pkcs11/Provider/Absolute.java
! test/jdk/sun/security/pkcs11/Provider/ConfigShortPath.java
! test/jdk/sun/security/pkcs11/Provider/LoginISE.java

Changeset: ef5e744a
Branch: foreign-memaccess+abi
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-01 08:05:55 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ef5e744a8136c3d983bdf8721a84fd1488b3c7a8

8372684: G1: Missing load_acquire() in G1 allocation path

Reviewed-by: kbarrett, sjohanss

! src/hotspot/share/gc/g1/g1AllocRegion.cpp
! src/hotspot/share/gc/g1/g1AllocRegion.hpp
! src/hotspot/share/gc/g1/g1AllocRegion.inline.hpp

Changeset: 3481252c
Branch: foreign-memaccess+abi
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-01 08:41:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3481252ced7c06c44154ceccc56b12cfd9a490c3

8372188: AArch64: Generate atomic match rules from M4 stencils

Reviewed-by: aph, haosun

! make/hotspot/gensrc/GensrcAdlc.gmk
! src/hotspot/cpu/aarch64/aarch64.ad
+ src/hotspot/cpu/aarch64/aarch64_atomic.ad
+ src/hotspot/cpu/aarch64/aarch64_atomic_ad.m4
- src/hotspot/cpu/aarch64/cas.m4

Changeset: 5bd7db03
Branch: foreign-memaccess+abi
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-01 09:03:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5bd7db034aaf8aa6780945e02a7f9a35e16b036e

8372730: Problem list compiler/arguments/TestCodeEntryAlignment.java on x64

Reviewed-by: lucy, goetz

! test/hotspot/jtreg/ProblemList.txt

Changeset: 160148cc
Branch: foreign-memaccess+abi
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-01 11:28:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/160148cc7b0c2774e7aa5fece653e41c9fa7c970

8372610: G1: JDK-8297692 broke code roots scan measurements

Reviewed-by: iwalulya, sjohanss

! src/hotspot/share/gc/g1/g1RemSet.cpp

Changeset: f5eecc45
Branch: foreign-memaccess+abi
Author:    Matthew Donovan <mdonovan at openjdk.org>
Date:      2025-12-01 12:18:19 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f5eecc454eb78fc1a3714dfe3cb94113238dd3ac

8353738: Update TLS unit tests to not use certificates with MD5 signatures

Reviewed-by: djelinski, abarashev

! test/jdk/javax/management/security/keystoreAgent
! test/jdk/javax/management/security/keystoreClient
! test/jdk/javax/management/security/truststoreAgent
! test/jdk/javax/management/security/truststoreClient
! test/jdk/javax/net/ssl/HttpsURLConnection/CriticalSubjectAltName.java
- test/jdk/javax/net/ssl/HttpsURLConnection/crisubn.jks
- test/jdk/javax/net/ssl/HttpsURLConnection/trusted.jks
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/DNSIdentities.java
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IPAddressDNSIdentities.java
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IPAddressIPIdentities.java
- test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IPIdentities.java
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/Identities.java
+ test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IdentitiesBase.java
! test/lib/jdk/test/lib/security/CertificateBuilder.java

Changeset: 785ca67e
Branch: foreign-memaccess+abi
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-01 12:30:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/785ca67e46c762ed0ffaeda1e26e5f90276181e8

8372409: java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java timed out during warmup

Reviewed-by: djelinski

! src/java.net.http/share/classes/jdk/internal/net/http/Http3Connection.java
! test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java

Changeset: b98114f4
Branch: foreign-memaccess+abi
Author:    Coleen Phillimore <coleenp at openjdk.org>
Date:      2025-12-01 13:28:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b98114f4a20bcf3390114b56d05c38b23268979a

8365526: Crash with null Symbol passed to SystemDictionary::resolve_or_null

Reviewed-by: dholmes, never, jsjolen

! src/hotspot/share/classfile/resolutionErrors.cpp
! src/hotspot/share/classfile/resolutionErrors.hpp
! src/hotspot/share/classfile/systemDictionary.cpp

Changeset: d328e4e7
Branch: foreign-memaccess+abi
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-01 13:37:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d328e4e7e2f58fbfeb661f3502f95016159d7230

8372272: Hotspot shared lib loading - add load attempts to Events::log

Reviewed-by: lucy, azeller

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/windows/os_windows.cpp

Changeset: a1cc8f4e
Branch: foreign-memaccess+abi
Author:    William Kemper <wkemper at openjdk.org>
Date:      2025-12-01 15:37:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a1cc8f4e4107e361f64cf51ff73985e471cdde03

8372444: Genshen: Optimize evacuation function

Reviewed-by: ysr, xpeng

! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp
! src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.hpp

Changeset: 002fff39
Branch: foreign-memaccess+abi
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-01 16:57:59 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/002fff39aace870b27a9068de1662fcb0b3033a6

8220816: (fs) Files.createDirectory should make it more obvious that it fails when the directory already exists

Reviewed-by: alanb, jpai

! src/java.base/share/classes/java/nio/file/Files.java

Changeset: 6cb1c8f9
Branch: foreign-memaccess+abi
Author:    Jiangli Zhou <jiangli at openjdk.org>
Date:      2025-12-01 17:29:15 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6cb1c8f9cfcb797af788ca8fb490f388cc68f525

8371864: GaloisCounterMode.implGCMCrypt0 AVX512/AVX2 intrinsics stubs cause AES-GCM encryption failure for certain payload sizes

Co-authored-by: Thomas Holenstein <tholenst at google.com>
Co-authored-by: Lukas Zobernig <zlukas at google.com>
Reviewed-by: shade, sviswanathan

! src/hotspot/cpu/x86/stubGenerator_x86_64_aes.cpp
+ test/jdk/com/sun/crypto/provider/Cipher/AES/TestGCMSplitBound.java

Changeset: 45c0600d
Branch: foreign-memaccess+abi
Author:    Justin Lu <jlu at openjdk.org>
Date:      2025-12-01 18:17:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/45c0600d3abfa4bcd0338840523c0df69283afe2

8372609: Bug4944439 does not enforce locale correctly

Reviewed-by: liach, jpai

! test/jdk/java/text/Format/NumberFormat/Bug4944439.java

Changeset: 79e99bb0
Branch: foreign-memaccess+abi
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-01 18:30:38 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/79e99bb0778608733a677821a0bb35041e9fb939

8372566: Genshen: crash at ShenandoahScanRemembered::process_clusters after JDK-8371667

Reviewed-by: wkemper, kdnilsen, ysr

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp

Changeset: 84ffe872
Branch: foreign-memaccess+abi
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-02 08:38:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/84ffe87260753973835ea6b88443e28bcaf0122f

8342175: MemoryEaterMT fails intermittently with ExceptionInInitializerError

Reviewed-by: lmesnik, aboldtch

! test/hotspot/jtreg/vmTestbase/nsk/share/gc/GC.java

Changeset: 7278d2e8
Branch: foreign-memaccess+abi
Author:    Per Minborg <pminborg at openjdk.org>
Date:      2025-12-02 09:39:29 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7278d2e8e5835f090672f7625d391a1b4c1a6626

8372258: Improve TypeVariable support

Reviewed-by: liach

! src/java.base/share/classes/java/lang/reflect/TypeVariable.java
! src/java.base/share/classes/sun/reflect/generics/reflectiveObjects/TypeVariableImpl.java
+ test/jdk/java/lang/reflect/Generics/ProtectInnerStateOfTypeVariableImplTest.java

Changeset: f636fcad
Branch: foreign-memaccess+abi
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-02 10:58:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f636fcadd72eba7aefbf3f89777c14b3e3f19fb8

8372645: ParallelGC: Remove race between allocation and expansion before is_init_completed

Reviewed-by: ayang, sjohanss, eosterlund

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp

Changeset: e27abe8a
Branch: foreign-memaccess+abi
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-02 10:59:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e27abe8a979880f308c69ea53319565dcd2142b6

8372540: SerialGC: Remove race between allocation and expansion before is_init_completed

Reviewed-by: ayang, sjohanss, eosterlund

! src/hotspot/share/gc/serial/serialHeap.cpp

Changeset: 3f046f6d
Branch: foreign-memaccess+abi
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-02 11:56:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3f046f6dec72392d0693655c0f0ef9189529ce45

8372747: G1: Conservative heap alignment does not account for card table constraint

Reviewed-by: mdoerr, stefank, tschatzl, sjohanss

! src/hotspot/share/gc/g1/g1Arguments.cpp

Changeset: fd7283be
Branch: foreign-memaccess+abi
Author:    Doug Lea <dl at openjdk.org>
Date:      2025-12-02 12:05:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/fd7283be47489d3297aac6ecf6658ee9500b2891

8360046: Scalability issue when submitting virtual threads with almost empty tasks

Reviewed-by: vklang

! src/java.base/share/classes/java/lang/VirtualThread.java
! src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java
! test/jdk/java/util/concurrent/forkjoin/Starvation.java

Changeset: 13e062e7
Branch: foreign-memaccess+abi
Author:    Daniel Jeli?ski <djelinski at openjdk.org>
Date:      2025-12-02 12:13:03 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/13e062e7a36cf9880416a4e867de13778c6bed2b

8366578: Remove the field tagSize in various QuicPacketEncoder.OutgoingQuicPacket subclasses

Reviewed-by: jpai, dfuchs

! src/java.net.http/share/classes/jdk/internal/net/http/quic/packets/QuicPacketEncoder.java

Changeset: 5cba2c84
Branch: foreign-memaccess+abi
Author:    Daniel Jeli?ski <djelinski at openjdk.org>
Date:      2025-12-02 12:13:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5cba2c8461005f2f7bcafdce622126a113f4bbd4

8368093: Remove Stream::createPseudoHeaders

Reviewed-by: dfuchs, jpai, vyazici

! src/java.net.http/share/classes/jdk/internal/net/http/Stream.java

Changeset: 07856fce
Branch: foreign-memaccess+abi
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-02 12:17:40 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/07856fce34ba14a83fc1ac0faffe3b5ba883e0b5

8372787: ModuleReader should throw IOException consistently when using --patch-module and ModuleReader is closed

Reviewed-by: alanb

! src/java.base/share/classes/jdk/internal/module/ModulePatcher.java
+ test/jdk/java/lang/module/ModuleReader/patched/PatchedModuleReaderTest.java
= test/jdk/java/lang/module/ModuleReader/patched/java.base/java/lang/PatchedFoo.java

Changeset: d3083ac0
Branch: foreign-memaccess+abi
Author:    Yasumasa Suenaga <ysuenaga at openjdk.org>
Date:      2025-12-02 12:19:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d3083ac05453c9dd303038f90ddab50d52124e51

8371194: serviceability/sa/TestJhsdbJstackMixedWithXComp.java failing

Co-authored-by: Patricio Chilano Mateo <pchilanomate at openjdk.org>
Reviewed-by: cjplummer, pchilanomate

! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/bsd/BsdDebuggerLocal.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/cdbg/CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/LinuxCDebugger.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/aarch64/LinuxAARCH64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/amd64/LinuxAMD64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/ppc64/LinuxPPC64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/riscv64/LinuxRISCV64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/aarch64/AARCH64Frame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/amd64/AMD64Frame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java
! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackMixedWithXComp.java

Changeset: 6abf7b6f
Branch: foreign-memaccess+abi
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-02 12:38:16 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6abf7b6f226adb580718a314dc218d87289c80ac

8371986: Remove the default value of InitialRAMPercentage

Reviewed-by: shade, aboldtch

! src/hotspot/share/gc/shared/gc_globals.hpp
! src/hotspot/share/runtime/flags/jvmFlag.cpp
! src/java.base/share/man/java.md

Changeset: eecba58c
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-02 13:05:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/eecba58c6817dbac129c545604d6286dfdcf951f

8371587: Final mapping lost in ProcSmapsParser::parse_next

Reviewed-by: jsjolen, fandreuzzi

! src/hotspot/os/linux/procMapsParser.cpp
! src/hotspot/os/linux/procMapsParser.hpp
+ test/hotspot/gtest/runtime/test_procMapsParser_linux.cpp

Changeset: 6c01d3b0
Branch: foreign-memaccess+abi
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-02 13:10:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6c01d3b08862447983b96daaf34a4c62daf54101

8372451: C2 SuperWord: "endless loop" assert. Need to implement proper worklist mechanism

Reviewed-by: mhaessig, chagedorn

! src/hotspot/share/opto/vtransform.cpp
! src/hotspot/share/opto/vtransform.hpp
+ test/hotspot/jtreg/compiler/loopopts/superword/TestLongReductionChain.java

Changeset: c97d53a9
Branch: foreign-memaccess+abi
Author:    Christian Stein <cstein at openjdk.org>
Date:      2025-12-02 13:32:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c97d53a9529d9148aacd85a3b31d694f04df0758

8371470: Java Launcher does not fail when running compact java-file with private no-arg constructor

Reviewed-by: jpai

! src/jdk.compiler/share/classes/com/sun/tools/javac/launcher/SourceLauncher.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/launcher.properties
! test/langtools/tools/javac/launcher/SourceLauncherTest.java

Changeset: 6f2169ff
Branch: foreign-memaccess+abi
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-12-02 13:55:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6f2169ff6996e0629ce80455959a21947fd5de2c

8372755: Remove local suppression of VS C4146 warnings

Reviewed-by: ayang

! src/hotspot/os/windows/sharedRuntimeRem.cpp
! src/hotspot/share/runtime/atomicAccess.hpp

Changeset: a62296d8
Branch: foreign-memaccess+abi
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-12-02 14:00:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a62296d8a0858d63a930e91168254a9927f06783

8371464: C2: assert(no_dead_loop) failed: dead loop detected

Reviewed-by: chagedorn, dfenacci

! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/cfgnode.hpp
+ test/hotspot/jtreg/compiler/c2/TestDeadLoopAtMergeMem.java

Changeset: ca4ae806
Branch: foreign-memaccess+abi
Author:    Quan Anh Mai <qamai at openjdk.org>
Date:      2025-12-02 15:44:19 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ca4ae8063edddda36fafafd06b9b1a88ffbf9d2e

8371964: C2 compilation asserts with "Unexpected load/store size"

Reviewed-by: chagedorn, epeter

! src/hotspot/share/opto/vectornode.cpp
! test/hotspot/jtreg/compiler/arraycopy/TestArrayCopyDisjoint.java

Changeset: 8d5a37b0
Branch: foreign-memaccess+abi
Author:    Amit Kumar <amitkumar at openjdk.org>
Date:      2025-12-02 16:09:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8d5a37b060dd0ecf31f71dfe82ca4a565bc7f6d9

8371188: [s390x] Un-ProblemList TestUnreachableInnerLoop.java

Reviewed-by: aph, phubner

! test/hotspot/jtreg/ProblemList.txt

Changeset: 37d8e05e
Branch: foreign-memaccess+abi
Author:    Hannes Walln?fer <hannesw at openjdk.org>
Date:      2025-12-02 16:22:47 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/37d8e05eccc959b5b5e04b3da848f7de9220b00c

8372708: Javadoc ignores "-locale" and uses default locale for all messages and texts

Reviewed-by: liach

+ src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/standard_en.properties
+ src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/resources/doclets_en.properties
+ test/langtools/jdk/javadoc/tool/testLocaleOption/TestSupportedLocales.java

Changeset: 153c567a
Branch: foreign-memaccess+abi
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-02 18:06:43 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/153c567a4d3a537277a8c599142511aa4f4f3ae3

8370905: Update vm.defmeth tests to use virtual threads

Reviewed-by: vlivanov, coleenp, pchilanomate

! test/hotspot/jtreg/vmTestbase/vm/runtime/defmeth/StressTest.java

Changeset: ac0e6af8
Branch: foreign-memaccess+abi
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-02 18:16:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ac0e6af8f90ba77375b2841a5c8aa05743884a1e

6185110: Undefined behaviour of SampleModel for width, height < 0

Reviewed-by: psadhukhan

! src/java.desktop/share/classes/java/awt/image/BandedSampleModel.java
! src/java.desktop/share/classes/java/awt/image/ComponentSampleModel.java
! src/java.desktop/share/classes/java/awt/image/MultiPixelPackedSampleModel.java
! src/java.desktop/share/classes/java/awt/image/SampleModel.java
! src/java.desktop/share/classes/java/awt/image/SinglePixelPackedSampleModel.java
+ test/jdk/java/awt/image/SampleModelGetSamplesAndPixelsTest.java

Changeset: 5627ff2d
Branch: foreign-memaccess+abi
Author:    Dean Long <dlong at openjdk.org>
Date:      2025-12-02 18:18:56 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5627ff2d9165ee1f7354c1ff1626f4949ef7fa3f

8370766: JVM crashes when running compiler/exceptions/TestAccessErrorInCatch.java fails with -XX:+VerifyStack

Co-authored-by: Manuel H?ssig <mhaessig at openjdk.org>
Reviewed-by: mhaessig, chagedorn

! src/hotspot/share/opto/doCall.cpp
! test/hotspot/jtreg/compiler/exceptions/TestAccessErrorInCatch.java

Changeset: 618732ff
Branch: foreign-memaccess+abi
Author:    Martin Doerr <mdoerr at openjdk.org>
Date:      2025-12-02 19:36:43 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/618732ffc04ef393c9b8a3265c12ba66f31784d9

8371820: Further AES performance improvements for key schedule generation

Reviewed-by: rrich, valeriep

! src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp
! src/hotspot/cpu/ppc/stubGenerator_ppc.cpp
! src/hotspot/cpu/riscv/stubGenerator_riscv.cpp
! src/hotspot/cpu/x86/stubGenerator_x86_64_aes.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/library_call.hpp
! src/java.base/share/classes/com/sun/crypto/provider/AES_Crypt.java

Changeset: b97ed667
Branch: foreign-memaccess+abi
Author:    Xueming Shen <sherman at openjdk.org>
Date:      2025-12-02 19:47:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b97ed667db0bd527461b2b385af3001f53d71c19

8365675: Add String Unicode Case-Folding Support

Reviewed-by: rriggs, naoto, ihse

! make/ToolsJdk.gmk
- make/jdk/src/classes/build/tools/generatecharacter/CaseFolding.java
+ make/jdk/src/classes/build/tools/generatecharacter/GenerateCaseFolding.java
! make/modules/java.base/gensrc/GensrcCharacterData.gmk
! make/modules/java.base/gensrc/GensrcRegex.gmk
! src/java.base/share/classes/java/lang/String.java
! src/java.base/share/classes/java/lang/StringLatin1.java
! src/java.base/share/classes/java/lang/StringUTF16.java
! src/java.base/share/classes/java/util/regex/Pattern.java
+ src/java.base/share/classes/jdk/internal/lang/CaseFolding.java.template
- src/java.base/share/classes/jdk/internal/util/regex/CaseFolding.java.template
+ test/jdk/java/lang/String/UnicodeCaseFoldingTest.java
+ test/micro/org/openjdk/bench/java/lang/StringCompareToFoldCase.java

Changeset: 5a60e22b
Branch: foreign-memaccess+abi
Author:    Sergey Bylokhov <serb at openjdk.org>
Date:      2025-12-02 20:09:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5a60e22bc415b3335cbb6a63873b1b44ff2bf9d0

8369618: Remove outdated reference to JDK 1.1 in the spec of BufferedImage.TYPE_INT_ARGB

Reviewed-by: azvegint, kizune, prr

! src/java.desktop/share/classes/java/awt/image/BufferedImage.java

Changeset: 0bead706
Branch: foreign-memaccess+abi
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-02 20:49:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0bead70651ea3bf8dccf9942ef8d1bf3fb78c2ea

8372961: [BACKOUT] Remove the default value of InitialRAMPercentage

Reviewed-by: stefank

! src/hotspot/share/gc/shared/gc_globals.hpp
! src/hotspot/share/runtime/flags/jvmFlag.cpp
! src/java.base/share/man/java.md

Changeset: a2ad5ca9
Branch: foreign-memaccess+abi
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-02 20:51:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a2ad5ca93ef82797ecf3141d00216ef639a9e92d

8372939: Update JDK 26 spec URLs

Reviewed-by: liach

! src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java
! src/java.compiler/share/classes/javax/lang/model/SourceVersion.java

Changeset: 0fe1ffdc
Branch: foreign-memaccess+abi
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-02 20:52:23 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0fe1ffdc485e742eb3937f9fb26d14d6a11a76c4

8372940: Update symbol data script references

Reviewed-by: liach, darcy

! bin/generate-symbol-data.sh
! doc/starting-next-release.md
! src/jdk.compiler/share/data/symbols/README

Changeset: 8a28a764
Branch: foreign-memaccess+abi
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-02 20:52:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8a28a76451b2bbde49c1c051cb66c784f9e3cdd2

8372937: Abbreviate list of supported releases

Reviewed-by: liach

! src/jdk.compiler/share/classes/com/sun/tools/javac/main/Option.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties
! test/langtools/tools/javac/options/HelpOutputColumnWidthTest.java

Changeset: 37cd8d6c
Branch: foreign-memaccess+abi
Author:    Sergey Bylokhov <serb at openjdk.org>
Date:      2025-12-02 20:59:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/37cd8d6ca0bc4638d81e9a3c1e0bc785861ffbef

8371501: Change IAE to NPE in java.awt.image.Kernel when data is null

Reviewed-by: prr, azvegint, aivanov

! src/java.desktop/share/classes/java/awt/image/Kernel.java
! test/jdk/java/awt/image/ConvolveOp/KernelInitialisationTest.java

Changeset: 8f0cb57e
Branch: foreign-memaccess+abi
Author:    Henry Jen <henryjen at openjdk.org>
Date:      2025-12-02 22:11:38 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8f0cb57e439df87dee4c0ba7bbff0b981ebc3541

8347831: Re-examine version check when cross linking

Co-authored-by: Magnus Ihse Bursie <ihse at openjdk.org>
Reviewed-by: erikj, alanb

! make/modules/java.base/Gensrc.gmk
! make/modules/java.base/Java.gmk
+ src/java.base/share/classes/jdk/internal/misc/resources/release.txt.template
! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/JlinkTask.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/resources/jlink.properties

Changeset: b0a758f2
Branch: foreign-memaccess+abi
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-02 22:27:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b0a758f2180a8305c05e9640192818bbb31d7922

8372552: unhandled oop in the JvmtiEventController::set_user_enabled

Reviewed-by: cjplummer, amenkov, sspitsyn

! src/hotspot/share/prims/jvmtiEventController.cpp

Changeset: f5e4cd7f
Branch: foreign-memaccess+abi
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-02 23:48:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f5e4cd7f0d12fd21399b192b32a5c9abfe8a3564

8372039: post_sampled_object_alloc is called while lock is handled

Reviewed-by: sspitsyn, eosterlund, amenkov

! src/hotspot/share/cds/aotStreamedHeapLoader.cpp
! src/hotspot/share/cds/aotThread.cpp
! src/hotspot/share/prims/jvmtiExport.cpp
! src/hotspot/share/prims/jvmtiExport.hpp
! src/hotspot/share/runtime/javaThread.cpp
! src/hotspot/share/runtime/javaThread.hpp
+ test/hotspot/jtreg/serviceability/jvmti/events/SampledObjectAlloc/SamplingDuringInit/SamplingDuringInit.java
+ test/hotspot/jtreg/serviceability/jvmti/events/SampledObjectAlloc/SamplingDuringInit/libSamplingDuringInit.cpp

Changeset: 1f206e5e
Branch: foreign-memaccess+abi
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2025-12-03 00:27:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1f206e5e1268cd0a7f477ed2d2f49103b8a99db6

8372850: Update comment in SourceVersion for language evolution history for changes in 26

Reviewed-by: liach

! src/java.compiler/share/classes/javax/lang/model/SourceVersion.java

Changeset: 530493fe
Branch: foreign-memaccess+abi
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-03 02:46:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/530493fed4066b1efcf3ec22253b110495767eca

8364146: JList getScrollableUnitIncrement return 0

Reviewed-by: prr, tr

! src/java.desktop/share/classes/javax/swing/JList.java
+ test/jdk/javax/swing/JList/JListTest.java

Changeset: 8f3d0ade
Branch: foreign-memaccess+abi
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-03 08:06:15 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8f3d0ade11ddb45bb1719b6818e1b51df237a59b

8371893: [macOS] use dead_strip linker option to reduce binary size

Reviewed-by: erikj, lucy, serb

! make/autoconf/flags-ldflags.m4

Changeset: 2139c8c6
Branch: foreign-memaccess+abi
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-03 08:08:14 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2139c8c6e6e5c5f2c64ed3ad9ad8bd148a86efae

8372571: ResourceHashTable for some AOT data structures miss placement operator when allocating

Reviewed-by: aboldtch, jsjolen, kvn

! src/hotspot/share/cds/aotMappedHeapWriter.cpp

Changeset: a1e86941
Branch: foreign-memaccess+abi
Author:    Dean Long <dlong at openjdk.org>
Date:      2025-12-03 09:01:40 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a1e8694109ad87690e18fc03d17b6b9519092d81

8371306: JDK-8367002 behavior might not match existing HotSpot behavior.

Reviewed-by: thartmann, dholmes

! src/hotspot/share/runtime/sharedRuntime.cpp
! test/hotspot/jtreg/compiler/exceptions/IllegalAccessInCatch.jasm
! test/hotspot/jtreg/compiler/exceptions/TestAccessErrorInCatch.java

Changeset: b3e063c2
Branch: foreign-memaccess+abi
Author:    root <root at a3560046.lnxne.boe>
Committer: Amit Kumar <amitkumar at openjdk.org>
Date:      2025-12-03 09:04:11 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b3e063c2c34ac12ae2a566617560ecc52253262d

8372710: Update ProcessBuilder/Basic regex

Reviewed-by: shade, amitkumar

! test/jdk/java/lang/ProcessBuilder/Basic.java

Changeset: e65fd45d
Branch: foreign-memaccess+abi
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-03 09:17:08 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e65fd45dc7c9383a77fbd5171b541c2a003d30d2

8366101: Replace the use of ThreadTracker with ScopedValue in java.util.jar.JarFile

Reviewed-by: vyazici, alanb

! src/java.base/share/classes/java/util/jar/JarFile.java

Changeset: a25e6f64
Branch: foreign-memaccess+abi
Author:    Ramkumar Sunderbabu <rsunderbabu at openjdk.org>
Committer: Stefan Karlsson <stefank at openjdk.org>
Date:      2025-12-03 09:22:13 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a25e6f6462a5d77a2cb0dcec4f74e5e25d8565c4

8319158: Parallel: Make TestObjectTenuringFlags use createTestJavaProcessBuilder

Reviewed-by: stefank, aboldtch

! test/hotspot/jtreg/gc/arguments/TestObjectTenuringFlags.java

Changeset: 177f3404
Branch: foreign-memaccess+abi
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-03 09:24:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/177f3404dfb146be724d952f8c88b4d070e36b52

8372733: GHA: Bump to Ubuntu 24.04

Reviewed-by: erikj, ayang

! .github/workflows/build-alpine-linux.yml
! .github/workflows/build-cross-compile.yml
! .github/workflows/build-linux.yml
! .github/workflows/main.yml

Changeset: 3e04e114
Branch: foreign-memaccess+abi
Author:    Erik ?sterlund <eosterlund at openjdk.org>
Date:      2025-12-03 09:28:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3e04e11482605e7734ef75bc477fe31107988f42

8372738: ZGC: C2 allocation reloc promotion deopt race

Reviewed-by: aboldtch, stefank

! src/hotspot/share/gc/z/zBarrierSet.cpp
! src/hotspot/share/gc/z/zGeneration.cpp
! src/hotspot/share/gc/z/zPage.cpp
! src/hotspot/share/gc/z/zPage.hpp
! src/hotspot/share/gc/z/zRelocate.cpp
! src/hotspot/share/gc/z/zRelocate.hpp
! src/hotspot/share/gc/z/zRelocationSet.cpp
! src/hotspot/share/gc/z/zRelocationSet.hpp

Changeset: 858d2e43
Branch: foreign-memaccess+abi
Author:    Jonas Norlinder <jnorlinder at openjdk.org>
Committer: Kevin Walls <kevinw at openjdk.org>
Date:      2025-12-03 09:35:59 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/858d2e434dd4eb8aa94784bb1cd115554eec5dff

8372584: [Linux]: Replace reading proc to get thread user CPU time with clock_gettime

Reviewed-by: dholmes, kevinw, redestad

! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/linux/os_linux.hpp
+ test/micro/org/openjdk/bench/vm/runtime/ThreadMXBeanBench.java

Changeset: 94977063
Branch: foreign-memaccess+abi
Author:    Casper Norrbin <cnorrbin at openjdk.org>
Date:      2025-12-03 10:03:50 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/94977063baafc2e293193d284db408a069f12aca

8358706: Integer overflow with -XX:MinOopMapAllocation=-1

Reviewed-by: phubner, coleenp

! src/hotspot/share/runtime/globals.hpp

Changeset: f1a4d1bf
Branch: foreign-memaccess+abi
Author:    Casper Norrbin <cnorrbin at openjdk.org>
Date:      2025-12-03 10:06:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f1a4d1bfde652cf758117b93bbd02ae8248e805e

8372615: Many container tests fail when running rootless on cgroup v1

Reviewed-by: sgehwolf, dholmes

! test/hotspot/jtreg/containers/docker/DockerBasicTest.java
! test/hotspot/jtreg/containers/docker/ShareTmpDir.java
! test/hotspot/jtreg/containers/docker/TestCPUAwareness.java
! test/hotspot/jtreg/containers/docker/TestCPUSets.java
! test/hotspot/jtreg/containers/docker/TestContainerInfo.java
! test/hotspot/jtreg/containers/docker/TestJFREvents.java
! test/hotspot/jtreg/containers/docker/TestJFRNetworkEvents.java
! test/hotspot/jtreg/containers/docker/TestJFRWithJMX.java
! test/hotspot/jtreg/containers/docker/TestJcmd.java
! test/hotspot/jtreg/containers/docker/TestJcmdWithSideCar.java
! test/hotspot/jtreg/containers/docker/TestLimitsUpdating.java
! test/hotspot/jtreg/containers/docker/TestMemoryAwareness.java
! test/hotspot/jtreg/containers/docker/TestMemoryInvisibleParent.java
! test/hotspot/jtreg/containers/docker/TestMemoryWithCgroupV1.java
! test/hotspot/jtreg/containers/docker/TestMemoryWithSubgroups.java
! test/hotspot/jtreg/containers/docker/TestMisc.java
! test/hotspot/jtreg/containers/docker/TestPids.java
! test/jdk/jdk/internal/platform/docker/TestDockerBasic.java
! test/jdk/jdk/internal/platform/docker/TestDockerCpuMetrics.java
! test/jdk/jdk/internal/platform/docker/TestDockerMemoryMetrics.java
! test/jdk/jdk/internal/platform/docker/TestDockerMemoryMetricsSubgroup.java
! test/jdk/jdk/internal/platform/docker/TestGetFreeSwapSpaceSize.java
! test/jdk/jdk/internal/platform/docker/TestLimitsUpdating.java
! test/jdk/jdk/internal/platform/docker/TestPidsLimit.java
! test/jdk/jdk/internal/platform/docker/TestSystemMetrics.java
! test/jdk/jdk/internal/platform/docker/TestUseContainerSupport.java
! test/lib/jdk/test/lib/containers/docker/DockerTestUtils.java

Changeset: 804ce0a2
Branch: foreign-memaccess+abi
Author:    Richard Reingruber <rrich at openjdk.org>
Date:      2025-12-03 10:29:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/804ce0a2394cb3f837441976e5ef6eb4b9cab257

8370473: C2: Better Aligment of Vector Spill Slots

Reviewed-by: goetz, mdoerr

! src/hotspot/cpu/aarch64/aarch64.ad
! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/share/opto/chaitin.hpp
! src/hotspot/share/opto/matcher.cpp
! src/hotspot/share/opto/regmask.hpp
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorSpilling.java

Changeset: 170ebdc5
Branch: foreign-memaccess+abi
Author:    Igor Rudenko <iostream64 at gmail.com>
Committer: Per Minborg <pminborg at openjdk.org>
Date:      2025-12-03 10:37:55 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/170ebdc5b7b5e54cc7bec60944898d35a24d760b

8346657: Improve out of bounds exception messages for MemorySegments

Reviewed-by: jvernee, liach, mcimadamore

! src/java.base/share/classes/jdk/internal/foreign/AbstractMemorySegmentImpl.java
! src/java.base/share/classes/jdk/internal/foreign/SegmentBulkOperations.java
! src/java.base/share/classes/jdk/internal/foreign/StringSupport.java
! test/jdk/java/foreign/TestSegments.java

Changeset: 3f447edf
Branch: foreign-memaccess+abi
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-03 10:55:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3f447edf0e22431628ebb74212f760209ea29d37

8372862: AArch64: Fix GetAndSet-acquire costs after JDK-8372188

Reviewed-by: dlong, mhaessig

! src/hotspot/cpu/aarch64/aarch64_atomic.ad
! src/hotspot/cpu/aarch64/aarch64_atomic_ad.m4

Changeset: 125d1820
Branch: foreign-memaccess+abi
Author:    Galder Zamarre?o <galder at openjdk.org>
Committer: Severin Gehwolf <sgehwolf at openjdk.org>
Date:      2025-12-03 11:12:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/125d1820f1f64e465a6b83360c48715a79e3d165

8372393: Document requirement for separate metallib installation with Xcode 26.1.1

Reviewed-by: erikj

! doc/building.html
! doc/building.md

Changeset: a655ea48
Branch: foreign-memaccess+abi
Author:    Galder Zamarre?o <galder at openjdk.org>
Committer: Christian Hagedorn <chagedorn at openjdk.org>
Date:      2025-12-03 12:31:26 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a655ea48453a321fb7cadc6ffb6111276497a929

8371792: Refactor barrier loop tests out of TestIfMinMax

Reviewed-by: chagedorn, epeter, bmaillard

! test/hotspot/jtreg/compiler/c2/irTests/TestIfMinMax.java
+ test/hotspot/jtreg/compiler/gcbarriers/TestMinMaxLongLoopBarrier.java

Changeset: abb75ba6
Branch: foreign-memaccess+abi
Author:    Kerem Kat <krk at openjdk.org>
Committer: Volker Simonis <simonis at openjdk.org>
Date:      2025-12-03 13:01:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/abb75ba656ebe14e9e8e1d4a1765d64dfce9e661

8372587: Put jdk/jfr/jvm/TestWaste.java into the ProblemList

Reviewed-by: dholmes

! test/jdk/ProblemList.txt

Changeset: afb6a0c2
Branch: foreign-memaccess+abi
Author:    Alan Bateman <alanb at openjdk.org>
Date:      2025-12-03 13:03:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/afb6a0c2fecdb2114715290d5d463c9dccf93c28

8372958: SocketInputStream.read throws SocketException instead of returning -1 when input shutdown

Reviewed-by: djelinski, michaelm

! src/java.base/share/classes/sun/nio/ch/NioSocketImpl.java
! test/jdk/java/net/Socket/AsyncShutdown.java
! test/jdk/java/net/vthread/BlockingSocketOps.java
! test/jdk/java/nio/channels/vthread/BlockingChannelOps.java

Changeset: 135661b4
Branch: foreign-memaccess+abi
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-03 13:36:55 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/135661b4389663b8c2e348d9e61e72cc628636bb

8372179: Remove Unused ConcurrentHashTable::MultiGetHandle

Reviewed-by: dholmes, iwalulya

! src/hotspot/share/utilities/concurrentHashTable.hpp
! src/hotspot/share/utilities/concurrentHashTable.inline.hpp
! test/hotspot/gtest/utilities/test_concurrentHashtable.cpp

Changeset: c0636734
Branch: foreign-memaccess+abi
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-03 14:34:05 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c0636734bdf19de6ba41c127aef1f090010c6d90

8372993: Serial: max_eden_size is too small after JDK-8368740

Reviewed-by: ayang, aboldtch, stefank

! src/hotspot/share/gc/serial/defNewGeneration.cpp
! test/hotspot/jtreg/gc/arguments/TestNewSizeFlags.java

Changeset: 44e2d499
Branch: foreign-memaccess+abi
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-03 14:38:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/44e2d499f84458003aa73a149d1ae44735b71d91

8372705: The riscv-64 cross-compilation build is failing in the CI

Reviewed-by: dholmes, shade

! make/autoconf/flags-ldflags.m4
! make/autoconf/toolchain.m4

Changeset: 87c4b01e
Branch: foreign-memaccess+abi
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-03 14:38:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/87c4b01ea3d94c25d260f0687addf7ecd154279a

8372943: Restore --with-tools-dir

Reviewed-by: mikael, tbell, shade

! make/autoconf/basic.m4

Changeset: 829b8581
Branch: foreign-memaccess+abi
Author:    Volodymyr Paprotski <vpaprotski at openjdk.org>
Date:      2025-12-03 14:53:35 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/829b85813a3810eeecf6ce4b30b5c3d1fc34ad23

8372703: Test compiler/arguments/TestCodeEntryAlignment.java failed: assert(allocates2(pc)) failed: not in CodeBuffer memory

Reviewed-by: mhaessig, dfenacci, thartmann

! src/hotspot/cpu/x86/stubDeclarations_x86.hpp
! test/hotspot/jtreg/ProblemList.txt

Changeset: 1d753f11
Branch: foreign-memaccess+abi
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-03 15:14:57 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1d753f116135cffa3ec9e8b4af3922aa647317dc

8373010: Update starting-next-release.html after JDK-8372940

Reviewed-by: jpai, erikj

! doc/starting-next-release.html

Changeset: 3d54a802
Branch: foreign-memaccess+abi
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-03 15:21:11 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3d54a802e38f425c7035c947758c887fec48e43a

8372995: SerialGC: Allow SerialHeap::allocate_loaded_archive_space expand old_gen

Reviewed-by: ayang, jsikstro

! src/hotspot/share/gc/serial/serialHeap.cpp

Changeset: 6d5bf9c8
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-03 15:30:14 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6d5bf9c801bbec3cd3580f889cc92415021f7322

8372999: Parallel: Old generation min size constraint broken

Reviewed-by: stefank, jsikstro

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp

Changeset: af8977e4
Branch: foreign-memaccess+abi
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-03 15:32:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/af8977e40661db2edec069d524f7c9352c7de850

8372951: The property jdk.httpclient.quic.maxBidiStreams should be renamed to jdk.internal
8365794: StreamLimitTest vs H3StreamLimitReachedTest: consider renaming or merging

Reviewed-by: jpai

! src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java
! test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java
! test/jdk/java/net/httpclient/http3/H3StreamLimitReachedTest.java
! test/jdk/java/net/httpclient/http3/StreamLimitTest.java

Changeset: c4321503
Branch: foreign-memaccess+abi
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-03 16:37:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c4321503976840f6630567c4fa430cd1ffca41fb

8372809: Test vmTestbase/nsk/jdi/ThreadReference/isSuspended/issuspended001/TestDescription.java failed: JVMTI_ERROR_THREAD_NOT_ALIVE

Reviewed-by: amenkov, sspitsyn

! src/jdk.jdwp.agent/share/native/libjdwp/threadControl.c

Changeset: 0bcef61a
Branch: foreign-memaccess+abi
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-03 17:15:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0bcef61a6de027c1b7e481e2115016ee961707a5

8372957: After JDK-8282441 JDWP might allow some invalid FrameIDs to be used

Reviewed-by: amenkov, sspitsyn

! src/jdk.jdwp.agent/share/native/libjdwp/threadControl.c

Changeset: fa6ca0bb
Branch: foreign-memaccess+abi
Author:    Justin Lu <jlu at openjdk.org>
Date:      2025-12-03 17:25:05 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/fa6ca0bbd14436cd3778a7a3383183cd73688123

8362428: Update IANA Language Subtag Registry to Version 2025-08-25

Reviewed-by: lancea, naoto, iris

! src/java.base/share/data/lsrdata/language-subtag-registry.txt
! test/jdk/java/util/Locale/LanguageSubtagRegistryTest.java

Changeset: 8d80778e
Branch: foreign-memaccess+abi
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-03 18:02:06 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8d80778e05aee878f9a3e8beabe6a0cfd0a02c16

8373023: [REDO] Remove the default value of InitialRAMPercentage

Reviewed-by: stefank, sjohanss, aboldtch

! src/hotspot/share/gc/shared/gc_globals.hpp
! src/hotspot/share/runtime/flags/jvmFlag.cpp
! src/java.base/share/man/java.md
! test/hotspot/jtreg/ProblemList.txt
! test/jdk/ProblemList.txt

Changeset: e93b10d0
Branch: foreign-memaccess+abi
Author:    Markus Gr?nlund <mgronlun at openjdk.org>
Date:      2025-12-03 18:12:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e93b10d08456f720e303771a882e79660911e1eb

8365400: Enhance JFR to emit file and module metadata for class loading

Reviewed-by: coleenp, egahlin

! src/hotspot/share/cds/lambdaProxyClassDictionary.cpp
! src/hotspot/share/classfile/classFileParser.cpp
! src/hotspot/share/classfile/classFileParser.hpp
! src/hotspot/share/classfile/klassFactory.cpp
! src/hotspot/share/classfile/systemDictionary.cpp
! src/hotspot/share/classfile/systemDictionary.hpp
! src/hotspot/share/classfile/vmClasses.cpp
! src/hotspot/share/jfr/instrumentation/jfrEventClassTransformer.cpp
! src/hotspot/share/jfr/jfr.cpp
! src/hotspot/share/jfr/jfr.hpp
! src/hotspot/share/jfr/metadata/metadata.xml
! src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSet.cpp
! src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetUtils.cpp
! src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetUtils.hpp
+ src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetUtils.inline.hpp
! src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceId.cpp
! src/hotspot/share/jfr/recorder/jfrRecorder.cpp
! src/hotspot/share/jfr/recorder/jfrRecorder.hpp
! src/hotspot/share/jfr/recorder/service/jfrRecorderService.cpp
+ src/hotspot/share/jfr/support/jfrClassDefineEvent.cpp
+ src/hotspot/share/jfr/support/jfrClassDefineEvent.hpp
! src/hotspot/share/jfr/support/jfrKlassExtension.hpp
! src/hotspot/share/jfr/support/jfrSymbolTable.cpp
! src/hotspot/share/jfr/support/jfrSymbolTable.hpp
+ src/hotspot/share/jfr/support/jfrSymbolTable.inline.hpp
! src/hotspot/share/jfr/support/jfrTraceIdExtension.hpp
+ src/hotspot/share/jfr/utilities/jfrConcurrentHashtable.hpp
+ src/hotspot/share/jfr/utilities/jfrConcurrentHashtable.inline.hpp
! src/hotspot/share/jfr/utilities/jfrLinkedList.hpp
! src/hotspot/share/jfr/utilities/jfrLinkedList.inline.hpp
! src/hotspot/share/oops/klass.cpp
! src/jdk.jfr/share/classes/jdk/jfr/internal/query/view.ini
! test/jdk/jdk/jfr/event/runtime/TestClassDefineEvent.java

Changeset: aff25f13
Branch: foreign-memaccess+abi
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-03 18:20:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/aff25f135af20ec89c7a68f2a0a0ede7eb1491a6

4690476: NegativeArraySizeException from AffineTransformOp with shear

Reviewed-by: psadhukhan, jdv

! src/java.desktop/share/classes/java/awt/image/AffineTransformOp.java
+ test/jdk/java/awt/image/AffineTransformOp/AffineTxOpSizeTest.java

Changeset: 8a5db916
Branch: foreign-memaccess+abi
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-03 19:58:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8a5db916aff1dc3eb37f25afbf0a633aa77baa20

8171432: (fs) WindowsWatchService.Poller::run does not call ReadDirectoryChangesW after a ERROR_NOTIFY_ENUM_DIR

Reviewed-by: alanb, djelinski

! src/java.base/windows/classes/sun/nio/fs/WindowsWatchService.java

Changeset: ba777f66
Branch: foreign-memaccess+abi
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-03 19:58:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ba777f6610fa3744d5f4bdfb87066b137ab543af

8372851: Modify java/io/File/GetXSpace.java to print path on failure of native call

Reviewed-by: jpai, naoto

! test/jdk/java/io/File/GetXSpace.java

Changeset: e534ee99
Branch: foreign-memaccess+abi
Author:    Patricio Chilano Mateo <pchilanomate at openjdk.org>
Date:      2025-12-03 20:01:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e534ee99327fed2263302a00061fb46fcdc6e302

8364343: Virtual Thread transition management needs to be independent of JVM TI

Co-authored-by: Alan Bateman <alanb at openjdk.org>
Reviewed-by: coleenp, dholmes, sspitsyn

! src/hotspot/share/classfile/javaClasses.cpp
! src/hotspot/share/classfile/javaClasses.hpp
! src/hotspot/share/classfile/vmIntrinsics.hpp
! src/hotspot/share/classfile/vmSymbols.hpp
! src/hotspot/share/code/aotCodeCache.cpp
! src/hotspot/share/include/jvm.h
! src/hotspot/share/jvmci/vmStructs_jvmci.cpp
! src/hotspot/share/opto/c2compiler.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/library_call.hpp
! src/hotspot/share/opto/runtime.cpp
! src/hotspot/share/opto/runtime.hpp
! src/hotspot/share/prims/jvm.cpp
! src/hotspot/share/prims/jvmtiEnv.cpp
! src/hotspot/share/prims/jvmtiEnvBase.cpp
! src/hotspot/share/prims/jvmtiExport.cpp
! src/hotspot/share/prims/jvmtiExtensions.cpp
! src/hotspot/share/prims/jvmtiTagMap.cpp
! src/hotspot/share/prims/jvmtiThreadState.cpp
! src/hotspot/share/prims/jvmtiThreadState.hpp
! src/hotspot/share/runtime/continuation.cpp
! src/hotspot/share/runtime/continuationFreezeThaw.cpp
! src/hotspot/share/runtime/handshake.cpp
! src/hotspot/share/runtime/handshake.hpp
! src/hotspot/share/runtime/javaThread.cpp
! src/hotspot/share/runtime/javaThread.hpp
+ src/hotspot/share/runtime/mountUnmountDisabler.cpp
+ src/hotspot/share/runtime/mountUnmountDisabler.hpp
! src/hotspot/share/runtime/mutexLocker.cpp
! src/hotspot/share/runtime/mutexLocker.hpp
! src/hotspot/share/runtime/sharedRuntime.cpp
! src/hotspot/share/runtime/sharedRuntime.hpp
! src/hotspot/share/runtime/stubDeclarations.hpp
! src/hotspot/share/runtime/stubInfo.cpp
! src/hotspot/share/runtime/stubInfo.hpp
! src/hotspot/share/runtime/suspendResumeManager.cpp
! src/hotspot/share/services/threadService.cpp
! src/java.base/share/classes/java/lang/VirtualThread.java
! src/java.base/share/native/libjava/VirtualThread.c
+ test/jdk/com/sun/management/HotSpotDiagnosticMXBean/DumpThreadsWhenParking.java
! test/jdk/com/sun/management/HotSpotDiagnosticMXBean/DumpThreadsWithEliminatedLock.java

Changeset: 5ea2b640
Branch: foreign-memaccess+abi
Author:    Alexander Zvegintsev <azvegint at openjdk.org>
Date:      2025-12-03 20:03:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5ea2b6402114d34465b2ad9e476ab8e36ddeea06

8372977: unnecessary gthread-2.0 loading

Reviewed-by: prr, kizune

! src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c
! src/java.desktop/unix/native/libawt_xawt/awt/gtk_interface.h

Changeset: 70e2bc87
Branch: foreign-memaccess+abi
Author:    Volodymyr Paprotski <vpaprotski at openjdk.org>
Date:      2025-12-03 21:32:29 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/70e2bc876abe35b3d447f8004245bdbf2fead59f

8372816: New test sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java succeeds in case of error

Reviewed-by: azeller, mdoerr

! test/jdk/sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java

Changeset: 9b386014
Branch: foreign-memaccess+abi
Author:    Evgeny Nikitin <enikitin at openjdk.org>
Committer: Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-03 21:58:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/9b386014a01b2bff47856bf9a8e113317db1f081

8373049: Update JCStress test suite

Reviewed-by: epavlova, lmesnik

! test/hotspot/jtreg/applications/jcstress/JcstressRunner.java

Changeset: 1294d55b
Branch: foreign-memaccess+abi
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
Date:      2025-12-03 22:42:47 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1294d55b194704dce92c5132d6779e6f4d4850e6

8372769: Test runtime/handshake/HandshakeDirectTest.java failed - JVMTI ERROR 13

Reviewed-by: lmesnik, pchilanomate, cjplummer, amenkov

! test/hotspot/jtreg/runtime/handshake/HandshakeDirectTest.java

Changeset: db2a5420
Branch: foreign-memaccess+abi
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-03 22:43:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/db2a5420a2e3d0f5f0f066eace37a8fd4f075802

8372861: Genshen: Override parallel_region_stride of ShenandoahResetBitmapClosure to a reasonable value for better parallelism

Reviewed-by: kdnilsen, shade, wkemper

! src/hotspot/share/gc/shenandoah/shenandoahGeneration.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegionClosures.hpp

Changeset: 8f8fda7c
Branch: foreign-memaccess+abi
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-03 22:46:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8f8fda7c80b57e8a36827cc260f0be0e5d61f6a6

8373048: Genshen: Remove dead code from Shenandoah

Reviewed-by: wkemper

! src/hotspot/share/gc/shenandoah/shenandoahFreeSet.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGeneration.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahRegulatorThread.hpp
! src/hotspot/share/gc/shenandoah/shenandoahScanRemembered.hpp

Changeset: 48563446
Branch: foreign-memaccess+abi
Author:    Chad Rakoczy <chadrako at amazon.com>
Committer: Vladimir Kozlov <kvn at openjdk.org>
Date:      2025-12-04 00:21:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/4856344668042fcbc4d15966519d27fb0a4f509f

8371046: Segfault in compiler/whitebox/StressNMethodRelocation.java with -XX:+UseZGC

Reviewed-by: kvn, eastigeevich

! src/hotspot/cpu/aarch64/relocInfo_aarch64.cpp
! src/hotspot/share/asm/codeBuffer.cpp
! src/hotspot/share/asm/codeBuffer.hpp
! src/hotspot/share/code/nmethod.cpp
! src/hotspot/share/code/nmethod.hpp
! src/hotspot/share/jvmci/vmStructs_jvmci.cpp
! src/hotspot/share/prims/whitebox.cpp

Changeset: 04c0f8d3
Branch: foreign-memaccess+abi
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-04 01:36:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/04c0f8d359a3f450ac2070c6d41834145d9c75f7

8372857: Improve debuggability of java/rmi/server/RemoteServer/AddrInUse.java test

Reviewed-by: msheppar, smarks, syan

! test/jdk/java/rmi/server/RemoteServer/AddrInUse.java

Changeset: db2cd1a4
Branch: foreign-memaccess+abi
Author:    Alexander Zvegintsev <azvegint at openjdk.org>
Date:      2025-12-04 02:15:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/db2cd1a4e0ee7b72339e7ee3c0286dc04fc5adbf

8372756: Mouse additional buttons and horizontal scrolling are broken on XWayland GNOME >= 47 after JDK-8351907

Reviewed-by: prr

! src/java.desktop/unix/classes/sun/awt/X11/XToolkit.java

Changeset: 019df4d8
Branch: foreign-memaccess+abi
Author:    Dmitry Drobotov <dmitry.drobotov at jetbrains.com>
Committer: Alexander Zuev <kizune at openjdk.org>
Date:      2025-12-04 03:22:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/019df4d89c8a0fe2b27c6ec074499445ae45bc3f

8372757: MacOS, Accessibility: Crash in [MenuAccessibility accessibilityChildren] after JDK-8341311

Reviewed-by: azvegint, psadhukhan

! src/java.desktop/macosx/native/libawt_lwawt/awt/a11y/MenuAccessibility.m

Changeset: dbf0742b
Branch: foreign-memaccess+abi
Author:    Ashutosh Mehra <asmehra at openjdk.org>
Date:      2025-12-04 05:03:07 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/dbf0742bf205ec57477373ebd43016383f7e7791

8373046: Method::get_c2i_unverified_entry() and get_c2i_no_clinit_check_entry() are missing check for abstract method

Reviewed-by: kvn, vlivanov

! src/hotspot/share/oops/method.cpp

Changeset: 828498c5
Branch: foreign-memaccess+abi
Author:    SendaoYan <syan at openjdk.org>
Date:      2025-12-04 07:34:43 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/828498c54b3b1089af9e076cb45f3cf3bea58e2f

8371978: tools/jar/ReproducibleJar.java fails on XFS

Reviewed-by: jpai

! test/jdk/tools/jar/ReproducibleJar.java

Changeset: 63a10e00
Branch: foreign-memaccess+abi
Author:    Erik Gahlin <egahlin at openjdk.org>
Date:      2025-12-04 08:01:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/63a10e0099111d69b167abf99d1a00084c4d6c1e

8373024: JFR: CPU throttle rate can't handle incorrect values

Reviewed-by: mgronlun

! src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformEventType.java
! src/jdk.jfr/share/classes/jdk/jfr/internal/settings/CPUThrottleSetting.java
! src/jdk.jfr/share/classes/jdk/jfr/internal/util/Rate.java

Changeset: 771253e2
Branch: foreign-memaccess+abi
Author:    Frederic Thevenet <fthevenet at openjdk.org>
Committer: David Holmes <dholmes at openjdk.org>
Date:      2025-12-04 08:23:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/771253e285c48329a9b45dfaaa852b64e74b31d4

8372802: PrintFlagsFinal should also print locked flags

Reviewed-by: dholmes, stuefe, lmesnik

! src/hotspot/share/runtime/flags/jvmFlag.cpp
+ test/hotspot/jtreg/runtime/CommandLine/PrintAllFlags.java

Changeset: bb867ed2
Branch: foreign-memaccess+abi
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-12-04 08:32:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/bb867ed23e2d6394d7e7dab55cf2122889fdf3ac

8372938: Fix reference to DeferredStatic<T> in HotSpot Style Guide

Reviewed-by: stefank, jsjolen

! doc/hotspot-style.html
! doc/hotspot-style.md

Changeset: 317daa3c
Branch: foreign-memaccess+abi
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-04 08:36:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/317daa3c004fbb1738e0af6acfbaf50c403c8230

8372643: Warning message on macos when building the JDK - (arm64) /tmp/lto.o unable to open object file: No such file or directory

Reviewed-by: erikj

! make/common/native/Flags.gmk

Changeset: 14000a25
Branch: foreign-memaccess+abi
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-04 09:37:56 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/14000a25e6efcbe55171d4cc8c68170a8cf0406f

8373080: Parallel: gc/arguments/TestMinInitialErgonomics.java should not be run with Large Pages

Reviewed-by: ayang, aboldtch

! test/hotspot/jtreg/gc/arguments/TestMinInitialErgonomics.java

Changeset: 16699a39
Branch: foreign-memaccess+abi
Author:    Volkan Yazici <vyazici at openjdk.org>
Date:      2025-12-04 09:40:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/16699a394d4d6c2b8a21e7de3c3d344c5a3309b4

8208693: HttpClient: Extend the request timeout's scope to cover the response body

Reviewed-by: jpai, dfuchs

! src/java.net.http/share/classes/java/net/http/HttpClient.java
! src/java.net.http/share/classes/java/net/http/HttpRequest.java
! src/java.net.http/share/classes/java/net/http/WebSocket.java
! src/java.net.http/share/classes/jdk/internal/net/http/ExchangeImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/Http1Exchange.java
! src/java.net.http/share/classes/jdk/internal/net/http/Http3ExchangeImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/HttpClientImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/MultiExchange.java
! src/java.net.http/share/classes/jdk/internal/net/http/Stream.java
! src/java.net.http/share/classes/jdk/internal/net/http/common/HttpBodySubscriberWrapper.java
+ test/jdk/java/net/httpclient/TimeoutResponseBodyTest.java
+ test/jdk/java/net/httpclient/TimeoutResponseHeaderTest.java
+ test/jdk/java/net/httpclient/TimeoutResponseTestSupport.java
+ test/jdk/java/net/httpclient/access/java.net.http/jdk/internal/net/http/HttpClientTimerAccess.java
! test/jdk/java/net/httpclient/websocket/WebSocketTest.java

Changeset: df0165bd
Branch: foreign-memaccess+abi
Author:    Ana-Maria Mihalceanu <ana-maria.m.mihalceanu at oracle.com>
Committer: Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-04 10:09:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/df0165bd6933728fdcf1956323401afdc47b3f78

8321139: jlink's compression plugin doesn't handle -c option correctly

Reviewed-by: jpai, alanb

! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/TaskHelper.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/resources/plugins.properties
! src/jdk.jlink/share/man/jlink.md
! test/jdk/tools/jlink/JLinkTest.java
! test/jdk/tools/jlink/TaskHelperTest.java
! test/setup_aot/TestSetupAOT.java

Changeset: 91c5bd55
Branch: foreign-memaccess+abi
Author:    Jatin Bhateja <jbhateja at openjdk.org>
Date:      2025-12-04 10:17:34 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/91c5bd550a36e10e8b39d1b322fd433ee8df14f5

8337791: VectorAPI jtreg ABSMaskedByteMaxVectorTests crashes with UseAVX=0 -XX:MaxVectorSize=8

Reviewed-by: epeter, sviswanathan, dlunden

! src/hotspot/cpu/x86/x86.ad
+ test/hotspot/jtreg/compiler/vectorapi/TestABSMaskedMaxByteVector.java

Changeset: b5970c97
Branch: foreign-memaccess+abi
Author:    Volodymyr Paprotski <vpaprotski at openjdk.org>
Date:      2025-12-04 10:21:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b5970c97bdd5b1e079e9ada0fbd469850c0e23b4

8373063: Test sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java fails on Aarch64 after JDK-8372816

Reviewed-by: dholmes, mdoerr

! test/jdk/sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java

Changeset: bcbdf90f
Branch: foreign-memaccess+abi
Author:    Markus Gr?nlund <mgronlun at openjdk.org>
Date:      2025-12-04 12:25:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/bcbdf90fce44ad87e7728ba0febef0951e361589

8373062: JFR build failure with CDS disabled

Reviewed-by: egahlin

! src/hotspot/share/classfile/systemDictionary.cpp
! src/hotspot/share/jfr/jfr.cpp
! src/hotspot/share/jfr/jfr.hpp
! src/hotspot/share/jfr/support/jfrClassDefineEvent.cpp
! src/hotspot/share/jfr/support/jfrClassDefineEvent.hpp

Changeset: c4ec983d
Branch: foreign-memaccess+abi
Author:    Robert Toyonaga <rtoyonag at redhat.com>
Committer: Thomas Stuefe <stuefe at openjdk.org>
Date:      2025-12-04 13:56:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c4ec983da57ee8aea71e88d5de2570c5d65a69df

8370715: JFR: Races are possible when dumping recordings

Reviewed-by: egahlin, stuefe

! src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformRecording.java
+ test/jdk/jdk/jfr/api/recording/dump/TestDumpOverwrite.java

Changeset: 6f03c780
Branch: foreign-memaccess+abi
Author:    Patricio Chilano Mateo <pchilanomate at openjdk.org>
Date:      2025-12-04 15:00:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6f03c7808de2b07b1e501d05b1bb7d5bfde5e393

8360702: runtime/Thread/AsyncExceptionTest.java timed out

Reviewed-by: dholmes, fbredberg

! test/hotspot/jtreg/runtime/Thread/AsyncExceptionOnMonitorEnter.java
! test/hotspot/jtreg/runtime/Thread/AsyncExceptionTest.java

Changeset: 33dda887
Branch: foreign-memaccess+abi
Author:    Christoph Langer <clanger at openjdk.org>
Date:      2025-12-04 15:03:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/33dda887d99d39b2d003fd6521db97d45da474f0

8351842: Windows specific issues in combination of JEP 493 and --with-external-symbols-in-bundles=public

Reviewed-by: erikj, mbaesken

! make/Bundles.gmk
! make/Images.gmk
! make/hotspot/lib/CompileJvm.gmk
! src/hotspot/share/prims/whitebox.cpp
! test/hotspot/jtreg/runtime/NMT/CheckForProperDetailStackTrace.java
! test/jdk/jdk/modules/etc/JmodExcludedFiles.java
! test/lib/jdk/test/whitebox/WhiteBox.java

Changeset: 27351401
Branch: foreign-memaccess+abi
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-12-04 15:25:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2735140147b159d3a3238804f221db4f835ef744

8370939: C2: SIGSEGV in SafePointNode::verify_input when processing MH call from Compile::process_late_inline_calls_no_inline()

Reviewed-by: thartmann, vlivanov

! src/hotspot/share/opto/callGenerator.cpp
! src/hotspot/share/opto/callnode.cpp
! src/hotspot/share/opto/callnode.hpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/compile.hpp
+ test/hotspot/jtreg/compiler/inlining/TestLateMHClonedCallNode.java

Changeset: 45dcc0e7
Branch: foreign-memaccess+abi
Author:    Kurt Miller <kurt at openjdk.org>
Committer: Jayathirth D V <jdv at openjdk.org>
Date:      2025-12-04 16:59:03 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/45dcc0e7e26b8130236c5ba80edb54fa530dab57

8371914: PNG defines in CFLAGS can cause compilation errors with external libpng

Reviewed-by: erikj, jdv

! make/modules/java.desktop/lib/ClientLibraries.gmk

Changeset: c55287d1
Branch: foreign-memaccess+abi
Author:    Nizar Benalla <nbenalla at openjdk.org>
Committer: Jesper Wilhelmsson <jwilhelm at openjdk.org>
Date:      2025-12-04 17:01:41 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c55287d197ef024033f8dfbb5a365cb091bc67fb

8370890: Start of release updates for JDK 27
8370893: Add SourceVersion.RELEASE_27
8370894: Add source 27 and target 27 to javac

Reviewed-by: darcy, iris, liach, erikj, dholmes

! .jcheck/conf
! make/conf/version-numbers.conf
! src/hotspot/share/classfile/classFileParser.cpp
! src/java.base/share/classes/java/lang/classfile/ClassFile.java
! src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java
! src/java.compiler/share/classes/javax/lang/model/SourceVersion.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractTypeVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractTypeVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementKindVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementKindVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementScanner14.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementScannerPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleAnnotationValueVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleAnnotationValueVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleElementVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleElementVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleTypeVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleTypeVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitorPreview.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassFile.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/processing/PrintingProcessor.java
+ src/jdk.compiler/share/data/symbols/java.base-Q.sym.txt
= src/jdk.compiler/share/data/symbols/java.compiler-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.desktop-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.management-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.net.http-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.httpserver-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.incubator.vector-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jartool-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jdeps-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.jfr-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jlink-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.jshell-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jsobject-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.localedata-Q.sym.txt
! src/jdk.compiler/share/data/symbols/symbols
! test/jdk/ProblemList.txt
! test/langtools/tools/javac/api/TestGetSourceVersions.java
! test/langtools/tools/javac/classfiles/ClassVersionChecker.java
! test/langtools/tools/javac/lib/JavacTestingAbstractProcessor.java
! test/langtools/tools/javac/preview/classReaderTest/Client.nopreview.out
! test/langtools/tools/javac/preview/classReaderTest/Client.preview.out
! test/langtools/tools/javac/versions/Versions.java

Changeset: c7aa1033
Branch: foreign-memaccess+abi
Author:    Justin Lu <jlu at openjdk.org>
Date:      2025-12-04 18:34:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c7aa10339aa40d37dc52e6dcec102f8dca114634

8372844: Improve usage of test/jdk/java/text/testlib/TestUtils.java locale methods

Reviewed-by: naoto

! test/jdk/java/text/Format/DateFormat/Bug4407042.java
! test/jdk/java/text/Format/DateFormat/Bug4845901.java
! test/jdk/java/text/Format/DateFormat/Bug6530336.java
! test/jdk/java/text/Format/DateFormat/DateFormatRegression.java
! test/jdk/java/text/Format/MessageFormat/MessageRegression.java
! test/jdk/java/text/Format/NumberFormat/NumberRegression.java
! test/jdk/java/util/Calendar/CalendarLimitTest.java
! test/jdk/java/util/Calendar/CalendarRegression.java
! test/jdk/java/util/Calendar/CalendarTest.java
! test/jdk/java/util/Calendar/bug4409072.java
! test/jdk/java/util/Locale/LocaleCategory.java
! test/jdk/java/util/TimeZone/TimeZoneRegression.java

Changeset: b19163b1
Branch: foreign-memaccess+abi
Author:    Matthew Donovan <mdonovan at openjdk.org>
Date:      2025-12-04 18:38:57 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b19163b107584118056073dc24a960ca04ca14e4

8356544: Implement additional tests for ciphersuites disabled with wildcards

Reviewed-by: rhalade

+ test/jdk/sun/security/ssl/CipherSuite/DisabledCipherSuitesNotNegotiated.java

Changeset: ef7532e7
Branch: foreign-memaccess+abi
Author:    Mikhail Yankelevich <myankelevich at openjdk.org>
Date:      2025-12-04 18:41:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ef7532e7e625628d6181c65116804ebb65f18061

8367994: test/jdk/sun/security/pkcs11/Signature/ tests pass when they should skip

Reviewed-by: rhalade

! test/jdk/sun/security/pkcs11/Signature/InitAgainPSS.java
! test/jdk/sun/security/pkcs11/Signature/KeyAndParamCheckForPSS.java
! test/jdk/sun/security/pkcs11/Signature/SigInteropPSS.java
! test/jdk/sun/security/pkcs11/Signature/SigInteropPSS2.java
! test/jdk/sun/security/pkcs11/Signature/SignatureTestPSS.java
! test/jdk/sun/security/pkcs11/Signature/SignatureTestPSS2.java
! test/jdk/sun/security/pkcs11/Signature/TestDSA.java

Changeset: 8e653d39
Branch: foreign-memaccess+abi
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-04 20:17:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8e653d394e45180e16714124ed6584f912eb5cba

8373099: Problem list intermittently failing test sun/awt/image/bug8038000.java

Reviewed-by: dholmes

! test/jdk/ProblemList.txt

Changeset: 5ec5a6ea
Branch: foreign-memaccess+abi
Author:    Ben Taylor <btaylor at openjdk.org>
Committer: William Kemper <wkemper at openjdk.org>
Date:      2025-12-04 21:37:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5ec5a6ea6c8e887b4e21f81e382f57129bffbab8

8373054: Shenandoah: Remove unnecessary BarrierSetNMethod::arm in shenandoahCodeRoots

Reviewed-by: wkemper, ysr, shade

! src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp

Changeset: c8b30da7
Branch: foreign-memaccess+abi
Author:    Ben Taylor <btaylor at openjdk.org>
Committer: Y. Srinivas Ramakrishna <ysr at openjdk.org>
Date:      2025-12-04 22:11:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c8b30da7ef48edb3d43e07d2c1b8622d8123c3a9

8373039: Remove Incorrect Asserts in shenandoahScanRemembered

Reviewed-by: wkemper, ysr, xpeng

! src/hotspot/share/gc/shenandoah/shenandoahScanRemembered.cpp

Changeset: 6db1c4f5
Branch: foreign-memaccess+abi
Author:    Coleen Phillimore <coleenp at openjdk.org>
Date:      2025-12-04 22:34:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6db1c4f5b93a1b7f7d9da36745dc433c9985a169

8371409: Wrong lock ordering between FullGCALot_lock and ThreadsLockThrottle_lock/MethodCompileQueue_lock

Reviewed-by: rehn, pchilanomate

! src/hotspot/share/memory/universe.cpp
! src/hotspot/share/runtime/mutexLocker.cpp

Changeset: 13e32bf1
Branch: foreign-memaccess+abi
Author:    Coleen Phillimore <coleenp at openjdk.org>
Date:      2025-12-04 22:39:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/13e32bf1667a3be8492d1e4e3a273951202acd9c

8372098: Move AccessFlags to InstanceKlass

Reviewed-by: liach, vlivanov, dlong, sspitsyn

! src/hotspot/share/ci/ciInstanceKlass.hpp
! src/hotspot/share/ci/ciKlass.cpp
! src/hotspot/share/ci/ciKlass.hpp
! src/hotspot/share/classfile/defaultMethods.cpp
! src/hotspot/share/classfile/javaClasses.cpp
! src/hotspot/share/classfile/systemDictionary.cpp
! src/hotspot/share/jvmci/vmStructs_jvmci.cpp
! src/hotspot/share/oops/arrayKlass.cpp
! src/hotspot/share/oops/fieldInfo.hpp
! src/hotspot/share/oops/instanceKlass.cpp
! src/hotspot/share/oops/instanceKlass.hpp
! src/hotspot/share/oops/klass.cpp
! src/hotspot/share/oops/klass.hpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/memnode.cpp
! src/hotspot/share/runtime/vmStructs.cpp
! src/hotspot/share/utilities/accessFlags.hpp
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/InstanceKlass.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/Klass.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/ObjectHeap.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/ConcurrentLocksPrinter.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/ClassLoaderStats.java
! src/jdk.internal.vm.ci/share/classes/jdk/vm/ci/hotspot/HotSpotResolvedObjectTypeImpl.java
! src/jdk.internal.vm.ci/share/classes/jdk/vm/ci/hotspot/HotSpotVMConfig.java

Changeset: 15f25389
Branch: foreign-memaccess+abi
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-04 23:56:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/15f25389435288881644f7aeab48fd2eae410999

8373056: Shenandoah: Remove unnecessary use of ShenandoahAllocRequest.type()

Reviewed-by: wkemper, kdnilsen

! src/hotspot/share/gc/shenandoah/shenandoahAllocRequest.hpp
! src/hotspot/share/gc/shenandoah/shenandoahFreeSet.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp

Changeset: 7e91d34f
Branch: foreign-memaccess+abi
Author:    Anjian Wen <wenanjian at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
Date:      2025-12-05 02:51:13 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7e91d34f3e83b4c39d6ce5de34373d7d74d54512

8365732: RISC-V: implement AES CTR intrinsics

Reviewed-by: fyang, mli

! src/hotspot/cpu/riscv/stubGenerator_riscv.cpp
! src/hotspot/cpu/riscv/vm_version_riscv.cpp

Changeset: 674cc3ee
Branch: foreign-memaccess+abi
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-05 03:30:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/674cc3eeca77f1f2a6d937b1df5c5cd8a13c2d31

8042054: JTree.updateUI uses out-of-date item size information

Reviewed-by: dnguyen, serb

! src/java.desktop/share/classes/javax/swing/JTree.java
+ test/jdk/javax/swing/JTree/JTreeUpdateTest.java

Changeset: b9339690
Branch: foreign-memaccess+abi
Author:    duke <duke at openjdk.org>
Date:      2025-12-05 11:02:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b9339690c01aad5d933f987f7fc827953fe9e70e

Automatic merge of jdk:master into master

! .jcheck/conf
! .jcheck/conf

Changeset: 9633ff7c
Branch: foreign-memaccess+abi
Author:    duke <duke at openjdk.org>
Date:      2025-12-05 11:02:23 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/9633ff7cb5f9dbfa878f5f93d9a38f0703d86f08

Automatic merge of master into foreign-memaccess+abi

! .jcheck/conf
! .jcheck/conf


From duke at openjdk.org  Fri Dec  5 11:21:29 2025
From: duke at openjdk.org (duke)
Date: Fri, 5 Dec 2025 11:21:29 GMT
Subject: git: openjdk/panama-foreign: master: 137 new changesets
Message-ID: <a188116f-d635-43e6-a00e-eadbbeccd4c5@openjdk.org>

Changeset: 78b155b2
Branch: master
Author:    Volkan Yazici <vyazici at openjdk.org>
Date:      2025-11-28 12:05:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/78b155b2b5745fc88c13586f93b632f61e038a94

8372147: ConnectionFlowControlTest should use HttpResponse.connectionLabel()

Reviewed-by: dfuchs

! test/jdk/java/net/httpclient/http2/ConnectionFlowControlTest.java

Changeset: e071afbf
Branch: master
Author:    Afshin Zafari <azafari at openjdk.org>
Date:      2025-11-28 13:02:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e071afbfe4507b6b3a306f90bb645465fdab0070

8351334: [ubsan] memoryReserver.cpp:552:60: runtime error: applying non-zero offset 1073741824 to null pointer

Reviewed-by: aboldtch, dholmes, jsjolen

! src/hotspot/share/gc/shared/jvmFlagConstraintsGC.cpp
! src/hotspot/share/memory/memoryReserver.cpp
! src/hotspot/share/runtime/arguments.cpp

Changeset: 52568bf4
Branch: master
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-11-28 22:50:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/52568bf4832b2bcc5dc547dbdf45a6a7172281fb

8372650: Convert GenericWaitBarrier to use Atomic<T>

Reviewed-by: shade, iwalulya

! src/hotspot/share/utilities/waitBarrier_generic.cpp
! src/hotspot/share/utilities/waitBarrier_generic.hpp

Changeset: 92e1357d
Branch: master
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-11-29 01:25:25 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/92e1357dfd2d874ef1a62ddd69c86a7bb189c6a2

8371802: Do not let QUIC connection to idle terminate when HTTP/3 is configured with a higher idle timeout

Reviewed-by: dfuchs

! src/java.net.http/share/classes/jdk/internal/net/http/Http3Connection.java
! src/java.net.http/share/classes/jdk/internal/net/http/Http3ConnectionPool.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/ConnectionTerminator.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/ConnectionTerminatorImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/IdleTimeoutManager.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicTimedEvent.java
+ test/jdk/java/net/httpclient/http3/H3IdleExceedsQuicIdleTimeout.java

Changeset: 282f3394
Branch: master
Author:    Lance Andersen <lancea at openjdk.org>
Date:      2025-11-30 12:53:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/282f339406d67d189e06c0bf8c7ca8d8cf5774e0

8369432: Add Support for JDBC 4.5 MR

Reviewed-by: alanb, rriggs

! src/java.sql/share/classes/java/sql/Array.java
! src/java.sql/share/classes/java/sql/Blob.java
! src/java.sql/share/classes/java/sql/Clob.java
! src/java.sql/share/classes/java/sql/Connection.java
! src/java.sql/share/classes/java/sql/DriverPropertyInfo.java
! src/java.sql/share/classes/java/sql/JDBCType.java
! src/java.sql/share/classes/java/sql/NClob.java
! src/java.sql/share/classes/java/sql/SQLPermission.java
+ src/java.sql/share/classes/java/sql/SQLUtils.java
! src/java.sql/share/classes/java/sql/SQLXML.java
! src/java.sql/share/classes/java/sql/Statement.java
! src/java.sql/share/classes/java/sql/Timestamp.java
! src/java.sql/share/classes/java/sql/Types.java
! src/java.sql/share/classes/java/sql/package-info.java
! test/jdk/java/sql/testng/test/sql/CallableStatementTests.java
+ test/jdk/java/sql/testng/test/sql/ConnectionTests.java
! test/jdk/java/sql/testng/test/sql/PreparedStatementTests.java
! test/jdk/java/sql/testng/test/sql/StatementTests.java
! test/jdk/java/sql/testng/test/sql/TimestampTests.java
! test/jdk/java/sql/testng/util/BaseTest.java
! test/jdk/java/sql/testng/util/StubCallableStatement.java
! test/jdk/java/sql/testng/util/StubConnection.java
+ test/jdk/java/sql/testng/util/StubDatabaseMetaData.java
! test/jdk/java/sql/testng/util/StubPreparedStatement.java
! test/jdk/java/sql/testng/util/StubStatement.java
! test/jdk/javax/sql/testng/test/rowset/serial/SQLInputImplTests.java
! test/jdk/javax/sql/testng/test/rowset/serial/SQLOutputImplTests.java

Changeset: 3fd551f9
Branch: master
Author:    SendaoYan <syan at openjdk.org>
Date:      2025-12-01 02:29:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3fd551f9926601b05a13a22b556d55425a37ee4d

8371769: TestMemoryInvisibleParent.java fails with java.nio.file.AccessDeniedException

Reviewed-by: sgehwolf, shade

! test/hotspot/jtreg/containers/docker/TestMemoryInvisibleParent.java

Changeset: c7a489db
Branch: master
Author:    Jayathirth D V <jdv at openjdk.org>
Date:      2025-12-01 05:40:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c7a489db9e4a7d696623fc2155a5504d9d2adb0d

8372534: Update Libpng to 1.6.51

Reviewed-by: serb, azvegint, prr

! make/modules/java.desktop/lib/ClientLibraries.gmk
! src/java.desktop/share/legal/libpng.md
! src/java.desktop/share/native/libsplashscreen/libpng/CHANGES
! src/java.desktop/share/native/libsplashscreen/libpng/README
! src/java.desktop/share/native/libsplashscreen/libpng/png.c
! src/java.desktop/share/native/libsplashscreen/libpng/png.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngconf.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngdebug.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngerror.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngget.c
! src/java.desktop/share/native/libsplashscreen/libpng/pnginfo.h
! src/java.desktop/share/native/libsplashscreen/libpng/pnglibconf.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngmem.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngpread.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngpriv.h
! src/java.desktop/share/native/libsplashscreen/libpng/pngread.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrio.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrtran.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngrutil.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngset.c
! src/java.desktop/share/native/libsplashscreen/libpng/pngstruct.h

Changeset: e0311ecb
Branch: master
Author:    Jatin Bhateja <jbhateja at openjdk.org>
Date:      2025-12-01 06:04:23 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e0311ecb85b78b6d97387c17102a8b6759eefc36

8351016: RA support for EVEX to REX/REX2 demotion to optimize NDD instructions

Reviewed-by: sviswanathan, dlunden, vlivanov, qamai

! src/hotspot/cpu/aarch64/aarch64.ad
! src/hotspot/cpu/arm/arm.ad
! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/cpu/riscv/riscv.ad
! src/hotspot/cpu/s390/s390.ad
! src/hotspot/cpu/x86/x86.ad
! src/hotspot/share/opto/chaitin.cpp
! src/hotspot/share/opto/chaitin.hpp
! src/hotspot/share/opto/idealGraphPrinter.cpp
! src/hotspot/share/opto/machnode.cpp
! src/hotspot/share/opto/machnode.hpp
! src/hotspot/share/opto/matcher.hpp
! src/hotspot/share/opto/node.hpp

Changeset: 81b26ba8
Branch: master
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-01 06:42:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/81b26ba8131b74a7bb4309bd3608dda2ba99a6ca

8372685: C2 SuperWord: wrong requires in test after JDK-8371146

Reviewed-by: chagedorn, mbaesken

! test/hotspot/jtreg/compiler/loopopts/superword/TestAliasingCheckPreLimitNotAvailable.java

Changeset: ca96366c
Branch: master
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-01 06:51:03 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ca96366c03b89fa90a015e6c2d5912a9f2554c92

8372528: Unify atomic exchange and compare exchange

Reviewed-by: kbarrett, stefank

! src/hotspot/cpu/ppc/atomicAccess_ppc.hpp
! src/hotspot/os_cpu/bsd_aarch64/atomicAccess_bsd_aarch64.hpp
! src/hotspot/os_cpu/bsd_x86/atomicAccess_bsd_x86.hpp
! src/hotspot/os_cpu/bsd_zero/atomicAccess_bsd_zero.hpp
! src/hotspot/os_cpu/linux_aarch64/atomicAccess_linux_aarch64.hpp
! src/hotspot/os_cpu/linux_arm/atomicAccess_linux_arm.hpp
! src/hotspot/os_cpu/linux_riscv/atomicAccess_linux_riscv.hpp
! src/hotspot/os_cpu/linux_s390/atomicAccess_linux_s390.hpp
! src/hotspot/os_cpu/linux_x86/atomicAccess_linux_x86.hpp
! src/hotspot/os_cpu/linux_zero/atomicAccess_linux_zero.hpp
! src/hotspot/os_cpu/windows_aarch64/atomicAccess_windows_aarch64.hpp
! src/hotspot/os_cpu/windows_x86/atomicAccess_windows_x86.hpp
! src/hotspot/share/runtime/atomic.hpp
! src/hotspot/share/runtime/atomicAccess.hpp
! test/hotspot/gtest/runtime/test_atomic.cpp
! test/hotspot/gtest/runtime/test_atomicAccess.cpp

Changeset: 293fec7e
Branch: master
Author:    Christian Hagedorn <chagedorn at openjdk.org>
Date:      2025-12-01 07:06:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/293fec7e28ed06f0942e94b1c21affdf6aabe9ca

8372461: [IR Framework] Multiple test failures after JDK-8371789

Reviewed-by: epeter, syan, dfenacci

! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
! test/hotspot/jtreg/testlibrary_tests/ir_framework/tests/TestIRMatching.java

Changeset: a6bc9b3b
Branch: master
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-01 07:44:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a6bc9b3ba50c5d669213f082a32e30c9ab2f923d

8372588: [asan] serviceability/sa/TestJmapCore.java and TestJmapCoreMetaspace.java fail after recent improvements

Reviewed-by: stuefe, azeller, lucy

! test/hotspot/jtreg/serviceability/sa/TestJmapCore.java
! test/hotspot/jtreg/serviceability/sa/TestJmapCoreMetaspace.java

Changeset: 969eb1ce
Branch: master
Author:    Mikhail Yankelevich <myankelevich at openjdk.org>
Date:      2025-12-01 07:51:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/969eb1ce2419324582ee8d8108031323f82e125e

8365861: test/jdk/sun/security/pkcs11/Provider/ tests skipped without SkippedException

Reviewed-by: rhalade

! test/jdk/sun/security/pkcs11/Provider/Absolute.java
! test/jdk/sun/security/pkcs11/Provider/ConfigShortPath.java
! test/jdk/sun/security/pkcs11/Provider/LoginISE.java

Changeset: ef5e744a
Branch: master
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-01 08:05:55 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ef5e744a8136c3d983bdf8721a84fd1488b3c7a8

8372684: G1: Missing load_acquire() in G1 allocation path

Reviewed-by: kbarrett, sjohanss

! src/hotspot/share/gc/g1/g1AllocRegion.cpp
! src/hotspot/share/gc/g1/g1AllocRegion.hpp
! src/hotspot/share/gc/g1/g1AllocRegion.inline.hpp

Changeset: 3481252c
Branch: master
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-01 08:41:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3481252ced7c06c44154ceccc56b12cfd9a490c3

8372188: AArch64: Generate atomic match rules from M4 stencils

Reviewed-by: aph, haosun

! make/hotspot/gensrc/GensrcAdlc.gmk
! src/hotspot/cpu/aarch64/aarch64.ad
+ src/hotspot/cpu/aarch64/aarch64_atomic.ad
+ src/hotspot/cpu/aarch64/aarch64_atomic_ad.m4
- src/hotspot/cpu/aarch64/cas.m4

Changeset: 5bd7db03
Branch: master
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-01 09:03:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5bd7db034aaf8aa6780945e02a7f9a35e16b036e

8372730: Problem list compiler/arguments/TestCodeEntryAlignment.java on x64

Reviewed-by: lucy, goetz

! test/hotspot/jtreg/ProblemList.txt

Changeset: 160148cc
Branch: master
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-01 11:28:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/160148cc7b0c2774e7aa5fece653e41c9fa7c970

8372610: G1: JDK-8297692 broke code roots scan measurements

Reviewed-by: iwalulya, sjohanss

! src/hotspot/share/gc/g1/g1RemSet.cpp

Changeset: f5eecc45
Branch: master
Author:    Matthew Donovan <mdonovan at openjdk.org>
Date:      2025-12-01 12:18:19 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f5eecc454eb78fc1a3714dfe3cb94113238dd3ac

8353738: Update TLS unit tests to not use certificates with MD5 signatures

Reviewed-by: djelinski, abarashev

! test/jdk/javax/management/security/keystoreAgent
! test/jdk/javax/management/security/keystoreClient
! test/jdk/javax/management/security/truststoreAgent
! test/jdk/javax/management/security/truststoreClient
! test/jdk/javax/net/ssl/HttpsURLConnection/CriticalSubjectAltName.java
- test/jdk/javax/net/ssl/HttpsURLConnection/crisubn.jks
- test/jdk/javax/net/ssl/HttpsURLConnection/trusted.jks
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/DNSIdentities.java
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IPAddressDNSIdentities.java
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IPAddressIPIdentities.java
- test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IPIdentities.java
! test/jdk/sun/net/www/protocol/https/HttpsURLConnection/Identities.java
+ test/jdk/sun/net/www/protocol/https/HttpsURLConnection/IdentitiesBase.java
! test/lib/jdk/test/lib/security/CertificateBuilder.java

Changeset: 785ca67e
Branch: master
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-01 12:30:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/785ca67e46c762ed0ffaeda1e26e5f90276181e8

8372409: java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java timed out during warmup

Reviewed-by: djelinski

! src/java.net.http/share/classes/jdk/internal/net/http/Http3Connection.java
! test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java

Changeset: b98114f4
Branch: master
Author:    Coleen Phillimore <coleenp at openjdk.org>
Date:      2025-12-01 13:28:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b98114f4a20bcf3390114b56d05c38b23268979a

8365526: Crash with null Symbol passed to SystemDictionary::resolve_or_null

Reviewed-by: dholmes, never, jsjolen

! src/hotspot/share/classfile/resolutionErrors.cpp
! src/hotspot/share/classfile/resolutionErrors.hpp
! src/hotspot/share/classfile/systemDictionary.cpp

Changeset: d328e4e7
Branch: master
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-01 13:37:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d328e4e7e2f58fbfeb661f3502f95016159d7230

8372272: Hotspot shared lib loading - add load attempts to Events::log

Reviewed-by: lucy, azeller

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/windows/os_windows.cpp

Changeset: a1cc8f4e
Branch: master
Author:    William Kemper <wkemper at openjdk.org>
Date:      2025-12-01 15:37:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a1cc8f4e4107e361f64cf51ff73985e471cdde03

8372444: Genshen: Optimize evacuation function

Reviewed-by: ysr, xpeng

! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp
! src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.hpp

Changeset: 002fff39
Branch: master
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-01 16:57:59 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/002fff39aace870b27a9068de1662fcb0b3033a6

8220816: (fs) Files.createDirectory should make it more obvious that it fails when the directory already exists

Reviewed-by: alanb, jpai

! src/java.base/share/classes/java/nio/file/Files.java

Changeset: 6cb1c8f9
Branch: master
Author:    Jiangli Zhou <jiangli at openjdk.org>
Date:      2025-12-01 17:29:15 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6cb1c8f9cfcb797af788ca8fb490f388cc68f525

8371864: GaloisCounterMode.implGCMCrypt0 AVX512/AVX2 intrinsics stubs cause AES-GCM encryption failure for certain payload sizes

Co-authored-by: Thomas Holenstein <tholenst at google.com>
Co-authored-by: Lukas Zobernig <zlukas at google.com>
Reviewed-by: shade, sviswanathan

! src/hotspot/cpu/x86/stubGenerator_x86_64_aes.cpp
+ test/jdk/com/sun/crypto/provider/Cipher/AES/TestGCMSplitBound.java

Changeset: 45c0600d
Branch: master
Author:    Justin Lu <jlu at openjdk.org>
Date:      2025-12-01 18:17:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/45c0600d3abfa4bcd0338840523c0df69283afe2

8372609: Bug4944439 does not enforce locale correctly

Reviewed-by: liach, jpai

! test/jdk/java/text/Format/NumberFormat/Bug4944439.java

Changeset: 79e99bb0
Branch: master
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-01 18:30:38 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/79e99bb0778608733a677821a0bb35041e9fb939

8372566: Genshen: crash at ShenandoahScanRemembered::process_clusters after JDK-8371667

Reviewed-by: wkemper, kdnilsen, ysr

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp

Changeset: 84ffe872
Branch: master
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-02 08:38:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/84ffe87260753973835ea6b88443e28bcaf0122f

8342175: MemoryEaterMT fails intermittently with ExceptionInInitializerError

Reviewed-by: lmesnik, aboldtch

! test/hotspot/jtreg/vmTestbase/nsk/share/gc/GC.java

Changeset: 7278d2e8
Branch: master
Author:    Per Minborg <pminborg at openjdk.org>
Date:      2025-12-02 09:39:29 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7278d2e8e5835f090672f7625d391a1b4c1a6626

8372258: Improve TypeVariable support

Reviewed-by: liach

! src/java.base/share/classes/java/lang/reflect/TypeVariable.java
! src/java.base/share/classes/sun/reflect/generics/reflectiveObjects/TypeVariableImpl.java
+ test/jdk/java/lang/reflect/Generics/ProtectInnerStateOfTypeVariableImplTest.java

Changeset: f636fcad
Branch: master
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-02 10:58:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f636fcadd72eba7aefbf3f89777c14b3e3f19fb8

8372645: ParallelGC: Remove race between allocation and expansion before is_init_completed

Reviewed-by: ayang, sjohanss, eosterlund

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp

Changeset: e27abe8a
Branch: master
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-02 10:59:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e27abe8a979880f308c69ea53319565dcd2142b6

8372540: SerialGC: Remove race between allocation and expansion before is_init_completed

Reviewed-by: ayang, sjohanss, eosterlund

! src/hotspot/share/gc/serial/serialHeap.cpp

Changeset: 3f046f6d
Branch: master
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-02 11:56:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3f046f6dec72392d0693655c0f0ef9189529ce45

8372747: G1: Conservative heap alignment does not account for card table constraint

Reviewed-by: mdoerr, stefank, tschatzl, sjohanss

! src/hotspot/share/gc/g1/g1Arguments.cpp

Changeset: fd7283be
Branch: master
Author:    Doug Lea <dl at openjdk.org>
Date:      2025-12-02 12:05:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/fd7283be47489d3297aac6ecf6658ee9500b2891

8360046: Scalability issue when submitting virtual threads with almost empty tasks

Reviewed-by: vklang

! src/java.base/share/classes/java/lang/VirtualThread.java
! src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java
! test/jdk/java/util/concurrent/forkjoin/Starvation.java

Changeset: 13e062e7
Branch: master
Author:    Daniel Jeli?ski <djelinski at openjdk.org>
Date:      2025-12-02 12:13:03 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/13e062e7a36cf9880416a4e867de13778c6bed2b

8366578: Remove the field tagSize in various QuicPacketEncoder.OutgoingQuicPacket subclasses

Reviewed-by: jpai, dfuchs

! src/java.net.http/share/classes/jdk/internal/net/http/quic/packets/QuicPacketEncoder.java

Changeset: 5cba2c84
Branch: master
Author:    Daniel Jeli?ski <djelinski at openjdk.org>
Date:      2025-12-02 12:13:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5cba2c8461005f2f7bcafdce622126a113f4bbd4

8368093: Remove Stream::createPseudoHeaders

Reviewed-by: dfuchs, jpai, vyazici

! src/java.net.http/share/classes/jdk/internal/net/http/Stream.java

Changeset: 07856fce
Branch: master
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-02 12:17:40 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/07856fce34ba14a83fc1ac0faffe3b5ba883e0b5

8372787: ModuleReader should throw IOException consistently when using --patch-module and ModuleReader is closed

Reviewed-by: alanb

! src/java.base/share/classes/jdk/internal/module/ModulePatcher.java
+ test/jdk/java/lang/module/ModuleReader/patched/PatchedModuleReaderTest.java
= test/jdk/java/lang/module/ModuleReader/patched/java.base/java/lang/PatchedFoo.java

Changeset: d3083ac0
Branch: master
Author:    Yasumasa Suenaga <ysuenaga at openjdk.org>
Date:      2025-12-02 12:19:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d3083ac05453c9dd303038f90ddab50d52124e51

8371194: serviceability/sa/TestJhsdbJstackMixedWithXComp.java failing

Co-authored-by: Patricio Chilano Mateo <pchilanomate at openjdk.org>
Reviewed-by: cjplummer, pchilanomate

! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/bsd/BsdDebuggerLocal.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/cdbg/CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/LinuxCDebugger.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/aarch64/LinuxAARCH64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/amd64/LinuxAMD64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/ppc64/LinuxPPC64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/linux/riscv64/LinuxRISCV64CFrame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/aarch64/AARCH64Frame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/amd64/AMD64Frame.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/PStack.java
! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackMixedWithXComp.java

Changeset: 6abf7b6f
Branch: master
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-02 12:38:16 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6abf7b6f226adb580718a314dc218d87289c80ac

8371986: Remove the default value of InitialRAMPercentage

Reviewed-by: shade, aboldtch

! src/hotspot/share/gc/shared/gc_globals.hpp
! src/hotspot/share/runtime/flags/jvmFlag.cpp
! src/java.base/share/man/java.md

Changeset: eecba58c
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-02 13:05:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/eecba58c6817dbac129c545604d6286dfdcf951f

8371587: Final mapping lost in ProcSmapsParser::parse_next

Reviewed-by: jsjolen, fandreuzzi

! src/hotspot/os/linux/procMapsParser.cpp
! src/hotspot/os/linux/procMapsParser.hpp
+ test/hotspot/gtest/runtime/test_procMapsParser_linux.cpp

Changeset: 6c01d3b0
Branch: master
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-02 13:10:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6c01d3b08862447983b96daaf34a4c62daf54101

8372451: C2 SuperWord: "endless loop" assert. Need to implement proper worklist mechanism

Reviewed-by: mhaessig, chagedorn

! src/hotspot/share/opto/vtransform.cpp
! src/hotspot/share/opto/vtransform.hpp
+ test/hotspot/jtreg/compiler/loopopts/superword/TestLongReductionChain.java

Changeset: c97d53a9
Branch: master
Author:    Christian Stein <cstein at openjdk.org>
Date:      2025-12-02 13:32:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c97d53a9529d9148aacd85a3b31d694f04df0758

8371470: Java Launcher does not fail when running compact java-file with private no-arg constructor

Reviewed-by: jpai

! src/jdk.compiler/share/classes/com/sun/tools/javac/launcher/SourceLauncher.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/launcher.properties
! test/langtools/tools/javac/launcher/SourceLauncherTest.java

Changeset: 6f2169ff
Branch: master
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-12-02 13:55:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6f2169ff6996e0629ce80455959a21947fd5de2c

8372755: Remove local suppression of VS C4146 warnings

Reviewed-by: ayang

! src/hotspot/os/windows/sharedRuntimeRem.cpp
! src/hotspot/share/runtime/atomicAccess.hpp

Changeset: a62296d8
Branch: master
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-12-02 14:00:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a62296d8a0858d63a930e91168254a9927f06783

8371464: C2: assert(no_dead_loop) failed: dead loop detected

Reviewed-by: chagedorn, dfenacci

! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/cfgnode.hpp
+ test/hotspot/jtreg/compiler/c2/TestDeadLoopAtMergeMem.java

Changeset: ca4ae806
Branch: master
Author:    Quan Anh Mai <qamai at openjdk.org>
Date:      2025-12-02 15:44:19 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ca4ae8063edddda36fafafd06b9b1a88ffbf9d2e

8371964: C2 compilation asserts with "Unexpected load/store size"

Reviewed-by: chagedorn, epeter

! src/hotspot/share/opto/vectornode.cpp
! test/hotspot/jtreg/compiler/arraycopy/TestArrayCopyDisjoint.java

Changeset: 8d5a37b0
Branch: master
Author:    Amit Kumar <amitkumar at openjdk.org>
Date:      2025-12-02 16:09:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8d5a37b060dd0ecf31f71dfe82ca4a565bc7f6d9

8371188: [s390x] Un-ProblemList TestUnreachableInnerLoop.java

Reviewed-by: aph, phubner

! test/hotspot/jtreg/ProblemList.txt

Changeset: 37d8e05e
Branch: master
Author:    Hannes Walln?fer <hannesw at openjdk.org>
Date:      2025-12-02 16:22:47 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/37d8e05eccc959b5b5e04b3da848f7de9220b00c

8372708: Javadoc ignores "-locale" and uses default locale for all messages and texts

Reviewed-by: liach

+ src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/resources/standard_en.properties
+ src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/resources/doclets_en.properties
+ test/langtools/jdk/javadoc/tool/testLocaleOption/TestSupportedLocales.java

Changeset: 153c567a
Branch: master
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-02 18:06:43 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/153c567a4d3a537277a8c599142511aa4f4f3ae3

8370905: Update vm.defmeth tests to use virtual threads

Reviewed-by: vlivanov, coleenp, pchilanomate

! test/hotspot/jtreg/vmTestbase/vm/runtime/defmeth/StressTest.java

Changeset: ac0e6af8
Branch: master
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-02 18:16:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ac0e6af8f90ba77375b2841a5c8aa05743884a1e

6185110: Undefined behaviour of SampleModel for width, height < 0

Reviewed-by: psadhukhan

! src/java.desktop/share/classes/java/awt/image/BandedSampleModel.java
! src/java.desktop/share/classes/java/awt/image/ComponentSampleModel.java
! src/java.desktop/share/classes/java/awt/image/MultiPixelPackedSampleModel.java
! src/java.desktop/share/classes/java/awt/image/SampleModel.java
! src/java.desktop/share/classes/java/awt/image/SinglePixelPackedSampleModel.java
+ test/jdk/java/awt/image/SampleModelGetSamplesAndPixelsTest.java

Changeset: 5627ff2d
Branch: master
Author:    Dean Long <dlong at openjdk.org>
Date:      2025-12-02 18:18:56 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5627ff2d9165ee1f7354c1ff1626f4949ef7fa3f

8370766: JVM crashes when running compiler/exceptions/TestAccessErrorInCatch.java fails with -XX:+VerifyStack

Co-authored-by: Manuel H?ssig <mhaessig at openjdk.org>
Reviewed-by: mhaessig, chagedorn

! src/hotspot/share/opto/doCall.cpp
! test/hotspot/jtreg/compiler/exceptions/TestAccessErrorInCatch.java

Changeset: 618732ff
Branch: master
Author:    Martin Doerr <mdoerr at openjdk.org>
Date:      2025-12-02 19:36:43 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/618732ffc04ef393c9b8a3265c12ba66f31784d9

8371820: Further AES performance improvements for key schedule generation

Reviewed-by: rrich, valeriep

! src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp
! src/hotspot/cpu/ppc/stubGenerator_ppc.cpp
! src/hotspot/cpu/riscv/stubGenerator_riscv.cpp
! src/hotspot/cpu/x86/stubGenerator_x86_64_aes.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/library_call.hpp
! src/java.base/share/classes/com/sun/crypto/provider/AES_Crypt.java

Changeset: b97ed667
Branch: master
Author:    Xueming Shen <sherman at openjdk.org>
Date:      2025-12-02 19:47:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b97ed667db0bd527461b2b385af3001f53d71c19

8365675: Add String Unicode Case-Folding Support

Reviewed-by: rriggs, naoto, ihse

! make/ToolsJdk.gmk
- make/jdk/src/classes/build/tools/generatecharacter/CaseFolding.java
+ make/jdk/src/classes/build/tools/generatecharacter/GenerateCaseFolding.java
! make/modules/java.base/gensrc/GensrcCharacterData.gmk
! make/modules/java.base/gensrc/GensrcRegex.gmk
! src/java.base/share/classes/java/lang/String.java
! src/java.base/share/classes/java/lang/StringLatin1.java
! src/java.base/share/classes/java/lang/StringUTF16.java
! src/java.base/share/classes/java/util/regex/Pattern.java
+ src/java.base/share/classes/jdk/internal/lang/CaseFolding.java.template
- src/java.base/share/classes/jdk/internal/util/regex/CaseFolding.java.template
+ test/jdk/java/lang/String/UnicodeCaseFoldingTest.java
+ test/micro/org/openjdk/bench/java/lang/StringCompareToFoldCase.java

Changeset: 5a60e22b
Branch: master
Author:    Sergey Bylokhov <serb at openjdk.org>
Date:      2025-12-02 20:09:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5a60e22bc415b3335cbb6a63873b1b44ff2bf9d0

8369618: Remove outdated reference to JDK 1.1 in the spec of BufferedImage.TYPE_INT_ARGB

Reviewed-by: azvegint, kizune, prr

! src/java.desktop/share/classes/java/awt/image/BufferedImage.java

Changeset: 0bead706
Branch: master
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-02 20:49:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0bead70651ea3bf8dccf9942ef8d1bf3fb78c2ea

8372961: [BACKOUT] Remove the default value of InitialRAMPercentage

Reviewed-by: stefank

! src/hotspot/share/gc/shared/gc_globals.hpp
! src/hotspot/share/runtime/flags/jvmFlag.cpp
! src/java.base/share/man/java.md

Changeset: a2ad5ca9
Branch: master
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-02 20:51:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a2ad5ca93ef82797ecf3141d00216ef639a9e92d

8372939: Update JDK 26 spec URLs

Reviewed-by: liach

! src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java
! src/java.compiler/share/classes/javax/lang/model/SourceVersion.java

Changeset: 0fe1ffdc
Branch: master
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-02 20:52:23 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0fe1ffdc485e742eb3937f9fb26d14d6a11a76c4

8372940: Update symbol data script references

Reviewed-by: liach, darcy

! bin/generate-symbol-data.sh
! doc/starting-next-release.md
! src/jdk.compiler/share/data/symbols/README

Changeset: 8a28a764
Branch: master
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-02 20:52:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8a28a76451b2bbde49c1c051cb66c784f9e3cdd2

8372937: Abbreviate list of supported releases

Reviewed-by: liach

! src/jdk.compiler/share/classes/com/sun/tools/javac/main/Option.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties
! test/langtools/tools/javac/options/HelpOutputColumnWidthTest.java

Changeset: 37cd8d6c
Branch: master
Author:    Sergey Bylokhov <serb at openjdk.org>
Date:      2025-12-02 20:59:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/37cd8d6ca0bc4638d81e9a3c1e0bc785861ffbef

8371501: Change IAE to NPE in java.awt.image.Kernel when data is null

Reviewed-by: prr, azvegint, aivanov

! src/java.desktop/share/classes/java/awt/image/Kernel.java
! test/jdk/java/awt/image/ConvolveOp/KernelInitialisationTest.java

Changeset: 8f0cb57e
Branch: master
Author:    Henry Jen <henryjen at openjdk.org>
Date:      2025-12-02 22:11:38 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8f0cb57e439df87dee4c0ba7bbff0b981ebc3541

8347831: Re-examine version check when cross linking

Co-authored-by: Magnus Ihse Bursie <ihse at openjdk.org>
Reviewed-by: erikj, alanb

! make/modules/java.base/Gensrc.gmk
! make/modules/java.base/Java.gmk
+ src/java.base/share/classes/jdk/internal/misc/resources/release.txt.template
! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/JlinkTask.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/resources/jlink.properties

Changeset: b0a758f2
Branch: master
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-02 22:27:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b0a758f2180a8305c05e9640192818bbb31d7922

8372552: unhandled oop in the JvmtiEventController::set_user_enabled

Reviewed-by: cjplummer, amenkov, sspitsyn

! src/hotspot/share/prims/jvmtiEventController.cpp

Changeset: f5e4cd7f
Branch: master
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-02 23:48:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f5e4cd7f0d12fd21399b192b32a5c9abfe8a3564

8372039: post_sampled_object_alloc is called while lock is handled

Reviewed-by: sspitsyn, eosterlund, amenkov

! src/hotspot/share/cds/aotStreamedHeapLoader.cpp
! src/hotspot/share/cds/aotThread.cpp
! src/hotspot/share/prims/jvmtiExport.cpp
! src/hotspot/share/prims/jvmtiExport.hpp
! src/hotspot/share/runtime/javaThread.cpp
! src/hotspot/share/runtime/javaThread.hpp
+ test/hotspot/jtreg/serviceability/jvmti/events/SampledObjectAlloc/SamplingDuringInit/SamplingDuringInit.java
+ test/hotspot/jtreg/serviceability/jvmti/events/SampledObjectAlloc/SamplingDuringInit/libSamplingDuringInit.cpp

Changeset: 1f206e5e
Branch: master
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2025-12-03 00:27:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1f206e5e1268cd0a7f477ed2d2f49103b8a99db6

8372850: Update comment in SourceVersion for language evolution history for changes in 26

Reviewed-by: liach

! src/java.compiler/share/classes/javax/lang/model/SourceVersion.java

Changeset: 530493fe
Branch: master
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-03 02:46:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/530493fed4066b1efcf3ec22253b110495767eca

8364146: JList getScrollableUnitIncrement return 0

Reviewed-by: prr, tr

! src/java.desktop/share/classes/javax/swing/JList.java
+ test/jdk/javax/swing/JList/JListTest.java

Changeset: 8f3d0ade
Branch: master
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-03 08:06:15 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8f3d0ade11ddb45bb1719b6818e1b51df237a59b

8371893: [macOS] use dead_strip linker option to reduce binary size

Reviewed-by: erikj, lucy, serb

! make/autoconf/flags-ldflags.m4

Changeset: 2139c8c6
Branch: master
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-03 08:08:14 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2139c8c6e6e5c5f2c64ed3ad9ad8bd148a86efae

8372571: ResourceHashTable for some AOT data structures miss placement operator when allocating

Reviewed-by: aboldtch, jsjolen, kvn

! src/hotspot/share/cds/aotMappedHeapWriter.cpp

Changeset: a1e86941
Branch: master
Author:    Dean Long <dlong at openjdk.org>
Date:      2025-12-03 09:01:40 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a1e8694109ad87690e18fc03d17b6b9519092d81

8371306: JDK-8367002 behavior might not match existing HotSpot behavior.

Reviewed-by: thartmann, dholmes

! src/hotspot/share/runtime/sharedRuntime.cpp
! test/hotspot/jtreg/compiler/exceptions/IllegalAccessInCatch.jasm
! test/hotspot/jtreg/compiler/exceptions/TestAccessErrorInCatch.java

Changeset: b3e063c2
Branch: master
Author:    root <root at a3560046.lnxne.boe>
Committer: Amit Kumar <amitkumar at openjdk.org>
Date:      2025-12-03 09:04:11 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b3e063c2c34ac12ae2a566617560ecc52253262d

8372710: Update ProcessBuilder/Basic regex

Reviewed-by: shade, amitkumar

! test/jdk/java/lang/ProcessBuilder/Basic.java

Changeset: e65fd45d
Branch: master
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-03 09:17:08 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e65fd45dc7c9383a77fbd5171b541c2a003d30d2

8366101: Replace the use of ThreadTracker with ScopedValue in java.util.jar.JarFile

Reviewed-by: vyazici, alanb

! src/java.base/share/classes/java/util/jar/JarFile.java

Changeset: a25e6f64
Branch: master
Author:    Ramkumar Sunderbabu <rsunderbabu at openjdk.org>
Committer: Stefan Karlsson <stefank at openjdk.org>
Date:      2025-12-03 09:22:13 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a25e6f6462a5d77a2cb0dcec4f74e5e25d8565c4

8319158: Parallel: Make TestObjectTenuringFlags use createTestJavaProcessBuilder

Reviewed-by: stefank, aboldtch

! test/hotspot/jtreg/gc/arguments/TestObjectTenuringFlags.java

Changeset: 177f3404
Branch: master
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-03 09:24:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/177f3404dfb146be724d952f8c88b4d070e36b52

8372733: GHA: Bump to Ubuntu 24.04

Reviewed-by: erikj, ayang

! .github/workflows/build-alpine-linux.yml
! .github/workflows/build-cross-compile.yml
! .github/workflows/build-linux.yml
! .github/workflows/main.yml

Changeset: 3e04e114
Branch: master
Author:    Erik ?sterlund <eosterlund at openjdk.org>
Date:      2025-12-03 09:28:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3e04e11482605e7734ef75bc477fe31107988f42

8372738: ZGC: C2 allocation reloc promotion deopt race

Reviewed-by: aboldtch, stefank

! src/hotspot/share/gc/z/zBarrierSet.cpp
! src/hotspot/share/gc/z/zGeneration.cpp
! src/hotspot/share/gc/z/zPage.cpp
! src/hotspot/share/gc/z/zPage.hpp
! src/hotspot/share/gc/z/zRelocate.cpp
! src/hotspot/share/gc/z/zRelocate.hpp
! src/hotspot/share/gc/z/zRelocationSet.cpp
! src/hotspot/share/gc/z/zRelocationSet.hpp

Changeset: 858d2e43
Branch: master
Author:    Jonas Norlinder <jnorlinder at openjdk.org>
Committer: Kevin Walls <kevinw at openjdk.org>
Date:      2025-12-03 09:35:59 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/858d2e434dd4eb8aa94784bb1cd115554eec5dff

8372584: [Linux]: Replace reading proc to get thread user CPU time with clock_gettime

Reviewed-by: dholmes, kevinw, redestad

! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/linux/os_linux.hpp
+ test/micro/org/openjdk/bench/vm/runtime/ThreadMXBeanBench.java

Changeset: 94977063
Branch: master
Author:    Casper Norrbin <cnorrbin at openjdk.org>
Date:      2025-12-03 10:03:50 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/94977063baafc2e293193d284db408a069f12aca

8358706: Integer overflow with -XX:MinOopMapAllocation=-1

Reviewed-by: phubner, coleenp

! src/hotspot/share/runtime/globals.hpp

Changeset: f1a4d1bf
Branch: master
Author:    Casper Norrbin <cnorrbin at openjdk.org>
Date:      2025-12-03 10:06:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f1a4d1bfde652cf758117b93bbd02ae8248e805e

8372615: Many container tests fail when running rootless on cgroup v1

Reviewed-by: sgehwolf, dholmes

! test/hotspot/jtreg/containers/docker/DockerBasicTest.java
! test/hotspot/jtreg/containers/docker/ShareTmpDir.java
! test/hotspot/jtreg/containers/docker/TestCPUAwareness.java
! test/hotspot/jtreg/containers/docker/TestCPUSets.java
! test/hotspot/jtreg/containers/docker/TestContainerInfo.java
! test/hotspot/jtreg/containers/docker/TestJFREvents.java
! test/hotspot/jtreg/containers/docker/TestJFRNetworkEvents.java
! test/hotspot/jtreg/containers/docker/TestJFRWithJMX.java
! test/hotspot/jtreg/containers/docker/TestJcmd.java
! test/hotspot/jtreg/containers/docker/TestJcmdWithSideCar.java
! test/hotspot/jtreg/containers/docker/TestLimitsUpdating.java
! test/hotspot/jtreg/containers/docker/TestMemoryAwareness.java
! test/hotspot/jtreg/containers/docker/TestMemoryInvisibleParent.java
! test/hotspot/jtreg/containers/docker/TestMemoryWithCgroupV1.java
! test/hotspot/jtreg/containers/docker/TestMemoryWithSubgroups.java
! test/hotspot/jtreg/containers/docker/TestMisc.java
! test/hotspot/jtreg/containers/docker/TestPids.java
! test/jdk/jdk/internal/platform/docker/TestDockerBasic.java
! test/jdk/jdk/internal/platform/docker/TestDockerCpuMetrics.java
! test/jdk/jdk/internal/platform/docker/TestDockerMemoryMetrics.java
! test/jdk/jdk/internal/platform/docker/TestDockerMemoryMetricsSubgroup.java
! test/jdk/jdk/internal/platform/docker/TestGetFreeSwapSpaceSize.java
! test/jdk/jdk/internal/platform/docker/TestLimitsUpdating.java
! test/jdk/jdk/internal/platform/docker/TestPidsLimit.java
! test/jdk/jdk/internal/platform/docker/TestSystemMetrics.java
! test/jdk/jdk/internal/platform/docker/TestUseContainerSupport.java
! test/lib/jdk/test/lib/containers/docker/DockerTestUtils.java

Changeset: 804ce0a2
Branch: master
Author:    Richard Reingruber <rrich at openjdk.org>
Date:      2025-12-03 10:29:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/804ce0a2394cb3f837441976e5ef6eb4b9cab257

8370473: C2: Better Aligment of Vector Spill Slots

Reviewed-by: goetz, mdoerr

! src/hotspot/cpu/aarch64/aarch64.ad
! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/share/opto/chaitin.hpp
! src/hotspot/share/opto/matcher.cpp
! src/hotspot/share/opto/regmask.hpp
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorSpilling.java

Changeset: 170ebdc5
Branch: master
Author:    Igor Rudenko <iostream64 at gmail.com>
Committer: Per Minborg <pminborg at openjdk.org>
Date:      2025-12-03 10:37:55 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/170ebdc5b7b5e54cc7bec60944898d35a24d760b

8346657: Improve out of bounds exception messages for MemorySegments

Reviewed-by: jvernee, liach, mcimadamore

! src/java.base/share/classes/jdk/internal/foreign/AbstractMemorySegmentImpl.java
! src/java.base/share/classes/jdk/internal/foreign/SegmentBulkOperations.java
! src/java.base/share/classes/jdk/internal/foreign/StringSupport.java
! test/jdk/java/foreign/TestSegments.java

Changeset: 3f447edf
Branch: master
Author:    Aleksey Shipilev <shade at openjdk.org>
Date:      2025-12-03 10:55:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3f447edf0e22431628ebb74212f760209ea29d37

8372862: AArch64: Fix GetAndSet-acquire costs after JDK-8372188

Reviewed-by: dlong, mhaessig

! src/hotspot/cpu/aarch64/aarch64_atomic.ad
! src/hotspot/cpu/aarch64/aarch64_atomic_ad.m4

Changeset: 125d1820
Branch: master
Author:    Galder Zamarre?o <galder at openjdk.org>
Committer: Severin Gehwolf <sgehwolf at openjdk.org>
Date:      2025-12-03 11:12:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/125d1820f1f64e465a6b83360c48715a79e3d165

8372393: Document requirement for separate metallib installation with Xcode 26.1.1

Reviewed-by: erikj

! doc/building.html
! doc/building.md

Changeset: a655ea48
Branch: master
Author:    Galder Zamarre?o <galder at openjdk.org>
Committer: Christian Hagedorn <chagedorn at openjdk.org>
Date:      2025-12-03 12:31:26 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a655ea48453a321fb7cadc6ffb6111276497a929

8371792: Refactor barrier loop tests out of TestIfMinMax

Reviewed-by: chagedorn, epeter, bmaillard

! test/hotspot/jtreg/compiler/c2/irTests/TestIfMinMax.java
+ test/hotspot/jtreg/compiler/gcbarriers/TestMinMaxLongLoopBarrier.java

Changeset: abb75ba6
Branch: master
Author:    Kerem Kat <krk at openjdk.org>
Committer: Volker Simonis <simonis at openjdk.org>
Date:      2025-12-03 13:01:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/abb75ba656ebe14e9e8e1d4a1765d64dfce9e661

8372587: Put jdk/jfr/jvm/TestWaste.java into the ProblemList

Reviewed-by: dholmes

! test/jdk/ProblemList.txt

Changeset: afb6a0c2
Branch: master
Author:    Alan Bateman <alanb at openjdk.org>
Date:      2025-12-03 13:03:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/afb6a0c2fecdb2114715290d5d463c9dccf93c28

8372958: SocketInputStream.read throws SocketException instead of returning -1 when input shutdown

Reviewed-by: djelinski, michaelm

! src/java.base/share/classes/sun/nio/ch/NioSocketImpl.java
! test/jdk/java/net/Socket/AsyncShutdown.java
! test/jdk/java/net/vthread/BlockingSocketOps.java
! test/jdk/java/nio/channels/vthread/BlockingChannelOps.java

Changeset: 135661b4
Branch: master
Author:    Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-03 13:36:55 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/135661b4389663b8c2e348d9e61e72cc628636bb

8372179: Remove Unused ConcurrentHashTable::MultiGetHandle

Reviewed-by: dholmes, iwalulya

! src/hotspot/share/utilities/concurrentHashTable.hpp
! src/hotspot/share/utilities/concurrentHashTable.inline.hpp
! test/hotspot/gtest/utilities/test_concurrentHashtable.cpp

Changeset: c0636734
Branch: master
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-03 14:34:05 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c0636734bdf19de6ba41c127aef1f090010c6d90

8372993: Serial: max_eden_size is too small after JDK-8368740

Reviewed-by: ayang, aboldtch, stefank

! src/hotspot/share/gc/serial/defNewGeneration.cpp
! test/hotspot/jtreg/gc/arguments/TestNewSizeFlags.java

Changeset: 44e2d499
Branch: master
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-03 14:38:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/44e2d499f84458003aa73a149d1ae44735b71d91

8372705: The riscv-64 cross-compilation build is failing in the CI

Reviewed-by: dholmes, shade

! make/autoconf/flags-ldflags.m4
! make/autoconf/toolchain.m4

Changeset: 87c4b01e
Branch: master
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-03 14:38:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/87c4b01ea3d94c25d260f0687addf7ecd154279a

8372943: Restore --with-tools-dir

Reviewed-by: mikael, tbell, shade

! make/autoconf/basic.m4

Changeset: 829b8581
Branch: master
Author:    Volodymyr Paprotski <vpaprotski at openjdk.org>
Date:      2025-12-03 14:53:35 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/829b85813a3810eeecf6ce4b30b5c3d1fc34ad23

8372703: Test compiler/arguments/TestCodeEntryAlignment.java failed: assert(allocates2(pc)) failed: not in CodeBuffer memory

Reviewed-by: mhaessig, dfenacci, thartmann

! src/hotspot/cpu/x86/stubDeclarations_x86.hpp
! test/hotspot/jtreg/ProblemList.txt

Changeset: 1d753f11
Branch: master
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-03 15:14:57 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1d753f116135cffa3ec9e8b4af3922aa647317dc

8373010: Update starting-next-release.html after JDK-8372940

Reviewed-by: jpai, erikj

! doc/starting-next-release.html

Changeset: 3d54a802
Branch: master
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-03 15:21:11 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3d54a802e38f425c7035c947758c887fec48e43a

8372995: SerialGC: Allow SerialHeap::allocate_loaded_archive_space expand old_gen

Reviewed-by: ayang, jsikstro

! src/hotspot/share/gc/serial/serialHeap.cpp

Changeset: 6d5bf9c8
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-03 15:30:14 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6d5bf9c801bbec3cd3580f889cc92415021f7322

8372999: Parallel: Old generation min size constraint broken

Reviewed-by: stefank, jsikstro

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp

Changeset: af8977e4
Branch: master
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-03 15:32:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/af8977e40661db2edec069d524f7c9352c7de850

8372951: The property jdk.httpclient.quic.maxBidiStreams should be renamed to jdk.internal
8365794: StreamLimitTest vs H3StreamLimitReachedTest: consider renaming or merging

Reviewed-by: jpai

! src/java.net.http/share/classes/jdk/internal/net/http/quic/QuicConnectionImpl.java
! test/jdk/java/net/httpclient/http3/H3MultipleConnectionsToSameHost.java
! test/jdk/java/net/httpclient/http3/H3StreamLimitReachedTest.java
! test/jdk/java/net/httpclient/http3/StreamLimitTest.java

Changeset: c4321503
Branch: master
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-03 16:37:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c4321503976840f6630567c4fa430cd1ffca41fb

8372809: Test vmTestbase/nsk/jdi/ThreadReference/isSuspended/issuspended001/TestDescription.java failed: JVMTI_ERROR_THREAD_NOT_ALIVE

Reviewed-by: amenkov, sspitsyn

! src/jdk.jdwp.agent/share/native/libjdwp/threadControl.c

Changeset: 0bcef61a
Branch: master
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-03 17:15:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0bcef61a6de027c1b7e481e2115016ee961707a5

8372957: After JDK-8282441 JDWP might allow some invalid FrameIDs to be used

Reviewed-by: amenkov, sspitsyn

! src/jdk.jdwp.agent/share/native/libjdwp/threadControl.c

Changeset: fa6ca0bb
Branch: master
Author:    Justin Lu <jlu at openjdk.org>
Date:      2025-12-03 17:25:05 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/fa6ca0bbd14436cd3778a7a3383183cd73688123

8362428: Update IANA Language Subtag Registry to Version 2025-08-25

Reviewed-by: lancea, naoto, iris

! src/java.base/share/data/lsrdata/language-subtag-registry.txt
! test/jdk/java/util/Locale/LanguageSubtagRegistryTest.java

Changeset: 8d80778e
Branch: master
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-03 18:02:06 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8d80778e05aee878f9a3e8beabe6a0cfd0a02c16

8373023: [REDO] Remove the default value of InitialRAMPercentage

Reviewed-by: stefank, sjohanss, aboldtch

! src/hotspot/share/gc/shared/gc_globals.hpp
! src/hotspot/share/runtime/flags/jvmFlag.cpp
! src/java.base/share/man/java.md
! test/hotspot/jtreg/ProblemList.txt
! test/jdk/ProblemList.txt

Changeset: e93b10d0
Branch: master
Author:    Markus Gr?nlund <mgronlun at openjdk.org>
Date:      2025-12-03 18:12:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e93b10d08456f720e303771a882e79660911e1eb

8365400: Enhance JFR to emit file and module metadata for class loading

Reviewed-by: coleenp, egahlin

! src/hotspot/share/cds/lambdaProxyClassDictionary.cpp
! src/hotspot/share/classfile/classFileParser.cpp
! src/hotspot/share/classfile/classFileParser.hpp
! src/hotspot/share/classfile/klassFactory.cpp
! src/hotspot/share/classfile/systemDictionary.cpp
! src/hotspot/share/classfile/systemDictionary.hpp
! src/hotspot/share/classfile/vmClasses.cpp
! src/hotspot/share/jfr/instrumentation/jfrEventClassTransformer.cpp
! src/hotspot/share/jfr/jfr.cpp
! src/hotspot/share/jfr/jfr.hpp
! src/hotspot/share/jfr/metadata/metadata.xml
! src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSet.cpp
! src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetUtils.cpp
! src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetUtils.hpp
+ src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeSetUtils.inline.hpp
! src/hotspot/share/jfr/recorder/checkpoint/types/traceid/jfrTraceId.cpp
! src/hotspot/share/jfr/recorder/jfrRecorder.cpp
! src/hotspot/share/jfr/recorder/jfrRecorder.hpp
! src/hotspot/share/jfr/recorder/service/jfrRecorderService.cpp
+ src/hotspot/share/jfr/support/jfrClassDefineEvent.cpp
+ src/hotspot/share/jfr/support/jfrClassDefineEvent.hpp
! src/hotspot/share/jfr/support/jfrKlassExtension.hpp
! src/hotspot/share/jfr/support/jfrSymbolTable.cpp
! src/hotspot/share/jfr/support/jfrSymbolTable.hpp
+ src/hotspot/share/jfr/support/jfrSymbolTable.inline.hpp
! src/hotspot/share/jfr/support/jfrTraceIdExtension.hpp
+ src/hotspot/share/jfr/utilities/jfrConcurrentHashtable.hpp
+ src/hotspot/share/jfr/utilities/jfrConcurrentHashtable.inline.hpp
! src/hotspot/share/jfr/utilities/jfrLinkedList.hpp
! src/hotspot/share/jfr/utilities/jfrLinkedList.inline.hpp
! src/hotspot/share/oops/klass.cpp
! src/jdk.jfr/share/classes/jdk/jfr/internal/query/view.ini
! test/jdk/jdk/jfr/event/runtime/TestClassDefineEvent.java

Changeset: aff25f13
Branch: master
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-03 18:20:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/aff25f135af20ec89c7a68f2a0a0ede7eb1491a6

4690476: NegativeArraySizeException from AffineTransformOp with shear

Reviewed-by: psadhukhan, jdv

! src/java.desktop/share/classes/java/awt/image/AffineTransformOp.java
+ test/jdk/java/awt/image/AffineTransformOp/AffineTxOpSizeTest.java

Changeset: 8a5db916
Branch: master
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-03 19:58:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8a5db916aff1dc3eb37f25afbf0a633aa77baa20

8171432: (fs) WindowsWatchService.Poller::run does not call ReadDirectoryChangesW after a ERROR_NOTIFY_ENUM_DIR

Reviewed-by: alanb, djelinski

! src/java.base/windows/classes/sun/nio/fs/WindowsWatchService.java

Changeset: ba777f66
Branch: master
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-03 19:58:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ba777f6610fa3744d5f4bdfb87066b137ab543af

8372851: Modify java/io/File/GetXSpace.java to print path on failure of native call

Reviewed-by: jpai, naoto

! test/jdk/java/io/File/GetXSpace.java

Changeset: e534ee99
Branch: master
Author:    Patricio Chilano Mateo <pchilanomate at openjdk.org>
Date:      2025-12-03 20:01:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e534ee99327fed2263302a00061fb46fcdc6e302

8364343: Virtual Thread transition management needs to be independent of JVM TI

Co-authored-by: Alan Bateman <alanb at openjdk.org>
Reviewed-by: coleenp, dholmes, sspitsyn

! src/hotspot/share/classfile/javaClasses.cpp
! src/hotspot/share/classfile/javaClasses.hpp
! src/hotspot/share/classfile/vmIntrinsics.hpp
! src/hotspot/share/classfile/vmSymbols.hpp
! src/hotspot/share/code/aotCodeCache.cpp
! src/hotspot/share/include/jvm.h
! src/hotspot/share/jvmci/vmStructs_jvmci.cpp
! src/hotspot/share/opto/c2compiler.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/library_call.hpp
! src/hotspot/share/opto/runtime.cpp
! src/hotspot/share/opto/runtime.hpp
! src/hotspot/share/prims/jvm.cpp
! src/hotspot/share/prims/jvmtiEnv.cpp
! src/hotspot/share/prims/jvmtiEnvBase.cpp
! src/hotspot/share/prims/jvmtiExport.cpp
! src/hotspot/share/prims/jvmtiExtensions.cpp
! src/hotspot/share/prims/jvmtiTagMap.cpp
! src/hotspot/share/prims/jvmtiThreadState.cpp
! src/hotspot/share/prims/jvmtiThreadState.hpp
! src/hotspot/share/runtime/continuation.cpp
! src/hotspot/share/runtime/continuationFreezeThaw.cpp
! src/hotspot/share/runtime/handshake.cpp
! src/hotspot/share/runtime/handshake.hpp
! src/hotspot/share/runtime/javaThread.cpp
! src/hotspot/share/runtime/javaThread.hpp
+ src/hotspot/share/runtime/mountUnmountDisabler.cpp
+ src/hotspot/share/runtime/mountUnmountDisabler.hpp
! src/hotspot/share/runtime/mutexLocker.cpp
! src/hotspot/share/runtime/mutexLocker.hpp
! src/hotspot/share/runtime/sharedRuntime.cpp
! src/hotspot/share/runtime/sharedRuntime.hpp
! src/hotspot/share/runtime/stubDeclarations.hpp
! src/hotspot/share/runtime/stubInfo.cpp
! src/hotspot/share/runtime/stubInfo.hpp
! src/hotspot/share/runtime/suspendResumeManager.cpp
! src/hotspot/share/services/threadService.cpp
! src/java.base/share/classes/java/lang/VirtualThread.java
! src/java.base/share/native/libjava/VirtualThread.c
+ test/jdk/com/sun/management/HotSpotDiagnosticMXBean/DumpThreadsWhenParking.java
! test/jdk/com/sun/management/HotSpotDiagnosticMXBean/DumpThreadsWithEliminatedLock.java

Changeset: 5ea2b640
Branch: master
Author:    Alexander Zvegintsev <azvegint at openjdk.org>
Date:      2025-12-03 20:03:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5ea2b6402114d34465b2ad9e476ab8e36ddeea06

8372977: unnecessary gthread-2.0 loading

Reviewed-by: prr, kizune

! src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c
! src/java.desktop/unix/native/libawt_xawt/awt/gtk_interface.h

Changeset: 70e2bc87
Branch: master
Author:    Volodymyr Paprotski <vpaprotski at openjdk.org>
Date:      2025-12-03 21:32:29 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/70e2bc876abe35b3d447f8004245bdbf2fead59f

8372816: New test sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java succeeds in case of error

Reviewed-by: azeller, mdoerr

! test/jdk/sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java

Changeset: 9b386014
Branch: master
Author:    Evgeny Nikitin <enikitin at openjdk.org>
Committer: Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-03 21:58:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/9b386014a01b2bff47856bf9a8e113317db1f081

8373049: Update JCStress test suite

Reviewed-by: epavlova, lmesnik

! test/hotspot/jtreg/applications/jcstress/JcstressRunner.java

Changeset: 1294d55b
Branch: master
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
Date:      2025-12-03 22:42:47 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1294d55b194704dce92c5132d6779e6f4d4850e6

8372769: Test runtime/handshake/HandshakeDirectTest.java failed - JVMTI ERROR 13

Reviewed-by: lmesnik, pchilanomate, cjplummer, amenkov

! test/hotspot/jtreg/runtime/handshake/HandshakeDirectTest.java

Changeset: db2a5420
Branch: master
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-03 22:43:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/db2a5420a2e3d0f5f0f066eace37a8fd4f075802

8372861: Genshen: Override parallel_region_stride of ShenandoahResetBitmapClosure to a reasonable value for better parallelism

Reviewed-by: kdnilsen, shade, wkemper

! src/hotspot/share/gc/shenandoah/shenandoahGeneration.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegionClosures.hpp

Changeset: 8f8fda7c
Branch: master
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-03 22:46:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8f8fda7c80b57e8a36827cc260f0be0e5d61f6a6

8373048: Genshen: Remove dead code from Shenandoah

Reviewed-by: wkemper

! src/hotspot/share/gc/shenandoah/shenandoahFreeSet.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGeneration.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahGenerationalHeap.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahRegulatorThread.hpp
! src/hotspot/share/gc/shenandoah/shenandoahScanRemembered.hpp

Changeset: 48563446
Branch: master
Author:    Chad Rakoczy <chadrako at amazon.com>
Committer: Vladimir Kozlov <kvn at openjdk.org>
Date:      2025-12-04 00:21:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/4856344668042fcbc4d15966519d27fb0a4f509f

8371046: Segfault in compiler/whitebox/StressNMethodRelocation.java with -XX:+UseZGC

Reviewed-by: kvn, eastigeevich

! src/hotspot/cpu/aarch64/relocInfo_aarch64.cpp
! src/hotspot/share/asm/codeBuffer.cpp
! src/hotspot/share/asm/codeBuffer.hpp
! src/hotspot/share/code/nmethod.cpp
! src/hotspot/share/code/nmethod.hpp
! src/hotspot/share/jvmci/vmStructs_jvmci.cpp
! src/hotspot/share/prims/whitebox.cpp

Changeset: 04c0f8d3
Branch: master
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-04 01:36:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/04c0f8d359a3f450ac2070c6d41834145d9c75f7

8372857: Improve debuggability of java/rmi/server/RemoteServer/AddrInUse.java test

Reviewed-by: msheppar, smarks, syan

! test/jdk/java/rmi/server/RemoteServer/AddrInUse.java

Changeset: db2cd1a4
Branch: master
Author:    Alexander Zvegintsev <azvegint at openjdk.org>
Date:      2025-12-04 02:15:54 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/db2cd1a4e0ee7b72339e7ee3c0286dc04fc5adbf

8372756: Mouse additional buttons and horizontal scrolling are broken on XWayland GNOME >= 47 after JDK-8351907

Reviewed-by: prr

! src/java.desktop/unix/classes/sun/awt/X11/XToolkit.java

Changeset: 019df4d8
Branch: master
Author:    Dmitry Drobotov <dmitry.drobotov at jetbrains.com>
Committer: Alexander Zuev <kizune at openjdk.org>
Date:      2025-12-04 03:22:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/019df4d89c8a0fe2b27c6ec074499445ae45bc3f

8372757: MacOS, Accessibility: Crash in [MenuAccessibility accessibilityChildren] after JDK-8341311

Reviewed-by: azvegint, psadhukhan

! src/java.desktop/macosx/native/libawt_lwawt/awt/a11y/MenuAccessibility.m

Changeset: dbf0742b
Branch: master
Author:    Ashutosh Mehra <asmehra at openjdk.org>
Date:      2025-12-04 05:03:07 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/dbf0742bf205ec57477373ebd43016383f7e7791

8373046: Method::get_c2i_unverified_entry() and get_c2i_no_clinit_check_entry() are missing check for abstract method

Reviewed-by: kvn, vlivanov

! src/hotspot/share/oops/method.cpp

Changeset: 828498c5
Branch: master
Author:    SendaoYan <syan at openjdk.org>
Date:      2025-12-04 07:34:43 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/828498c54b3b1089af9e076cb45f3cf3bea58e2f

8371978: tools/jar/ReproducibleJar.java fails on XFS

Reviewed-by: jpai

! test/jdk/tools/jar/ReproducibleJar.java

Changeset: 63a10e00
Branch: master
Author:    Erik Gahlin <egahlin at openjdk.org>
Date:      2025-12-04 08:01:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/63a10e0099111d69b167abf99d1a00084c4d6c1e

8373024: JFR: CPU throttle rate can't handle incorrect values

Reviewed-by: mgronlun

! src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformEventType.java
! src/jdk.jfr/share/classes/jdk/jfr/internal/settings/CPUThrottleSetting.java
! src/jdk.jfr/share/classes/jdk/jfr/internal/util/Rate.java

Changeset: 771253e2
Branch: master
Author:    Frederic Thevenet <fthevenet at openjdk.org>
Committer: David Holmes <dholmes at openjdk.org>
Date:      2025-12-04 08:23:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/771253e285c48329a9b45dfaaa852b64e74b31d4

8372802: PrintFlagsFinal should also print locked flags

Reviewed-by: dholmes, stuefe, lmesnik

! src/hotspot/share/runtime/flags/jvmFlag.cpp
+ test/hotspot/jtreg/runtime/CommandLine/PrintAllFlags.java

Changeset: bb867ed2
Branch: master
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-12-04 08:32:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/bb867ed23e2d6394d7e7dab55cf2122889fdf3ac

8372938: Fix reference to DeferredStatic<T> in HotSpot Style Guide

Reviewed-by: stefank, jsjolen

! doc/hotspot-style.html
! doc/hotspot-style.md

Changeset: 317daa3c
Branch: master
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-04 08:36:00 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/317daa3c004fbb1738e0af6acfbaf50c403c8230

8372643: Warning message on macos when building the JDK - (arm64) /tmp/lto.o unable to open object file: No such file or directory

Reviewed-by: erikj

! make/common/native/Flags.gmk

Changeset: 14000a25
Branch: master
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-04 09:37:56 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/14000a25e6efcbe55171d4cc8c68170a8cf0406f

8373080: Parallel: gc/arguments/TestMinInitialErgonomics.java should not be run with Large Pages

Reviewed-by: ayang, aboldtch

! test/hotspot/jtreg/gc/arguments/TestMinInitialErgonomics.java

Changeset: 16699a39
Branch: master
Author:    Volkan Yazici <vyazici at openjdk.org>
Date:      2025-12-04 09:40:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/16699a394d4d6c2b8a21e7de3c3d344c5a3309b4

8208693: HttpClient: Extend the request timeout's scope to cover the response body

Reviewed-by: jpai, dfuchs

! src/java.net.http/share/classes/java/net/http/HttpClient.java
! src/java.net.http/share/classes/java/net/http/HttpRequest.java
! src/java.net.http/share/classes/java/net/http/WebSocket.java
! src/java.net.http/share/classes/jdk/internal/net/http/ExchangeImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/Http1Exchange.java
! src/java.net.http/share/classes/jdk/internal/net/http/Http3ExchangeImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/HttpClientImpl.java
! src/java.net.http/share/classes/jdk/internal/net/http/MultiExchange.java
! src/java.net.http/share/classes/jdk/internal/net/http/Stream.java
! src/java.net.http/share/classes/jdk/internal/net/http/common/HttpBodySubscriberWrapper.java
+ test/jdk/java/net/httpclient/TimeoutResponseBodyTest.java
+ test/jdk/java/net/httpclient/TimeoutResponseHeaderTest.java
+ test/jdk/java/net/httpclient/TimeoutResponseTestSupport.java
+ test/jdk/java/net/httpclient/access/java.net.http/jdk/internal/net/http/HttpClientTimerAccess.java
! test/jdk/java/net/httpclient/websocket/WebSocketTest.java

Changeset: df0165bd
Branch: master
Author:    Ana-Maria Mihalceanu <ana-maria.m.mihalceanu at oracle.com>
Committer: Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-04 10:09:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/df0165bd6933728fdcf1956323401afdc47b3f78

8321139: jlink's compression plugin doesn't handle -c option correctly

Reviewed-by: jpai, alanb

! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/TaskHelper.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/resources/plugins.properties
! src/jdk.jlink/share/man/jlink.md
! test/jdk/tools/jlink/JLinkTest.java
! test/jdk/tools/jlink/TaskHelperTest.java
! test/setup_aot/TestSetupAOT.java

Changeset: 91c5bd55
Branch: master
Author:    Jatin Bhateja <jbhateja at openjdk.org>
Date:      2025-12-04 10:17:34 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/91c5bd550a36e10e8b39d1b322fd433ee8df14f5

8337791: VectorAPI jtreg ABSMaskedByteMaxVectorTests crashes with UseAVX=0 -XX:MaxVectorSize=8

Reviewed-by: epeter, sviswanathan, dlunden

! src/hotspot/cpu/x86/x86.ad
+ test/hotspot/jtreg/compiler/vectorapi/TestABSMaskedMaxByteVector.java

Changeset: b5970c97
Branch: master
Author:    Volodymyr Paprotski <vpaprotski at openjdk.org>
Date:      2025-12-04 10:21:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b5970c97bdd5b1e079e9ada0fbd469850c0e23b4

8373063: Test sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java fails on Aarch64 after JDK-8372816

Reviewed-by: dholmes, mdoerr

! test/jdk/sun/security/provider/acvp/ML_DSA_Intrinsic_Test.java

Changeset: bcbdf90f
Branch: master
Author:    Markus Gr?nlund <mgronlun at openjdk.org>
Date:      2025-12-04 12:25:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/bcbdf90fce44ad87e7728ba0febef0951e361589

8373062: JFR build failure with CDS disabled

Reviewed-by: egahlin

! src/hotspot/share/classfile/systemDictionary.cpp
! src/hotspot/share/jfr/jfr.cpp
! src/hotspot/share/jfr/jfr.hpp
! src/hotspot/share/jfr/support/jfrClassDefineEvent.cpp
! src/hotspot/share/jfr/support/jfrClassDefineEvent.hpp

Changeset: c4ec983d
Branch: master
Author:    Robert Toyonaga <rtoyonag at redhat.com>
Committer: Thomas Stuefe <stuefe at openjdk.org>
Date:      2025-12-04 13:56:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c4ec983da57ee8aea71e88d5de2570c5d65a69df

8370715: JFR: Races are possible when dumping recordings

Reviewed-by: egahlin, stuefe

! src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformRecording.java
+ test/jdk/jdk/jfr/api/recording/dump/TestDumpOverwrite.java

Changeset: 6f03c780
Branch: master
Author:    Patricio Chilano Mateo <pchilanomate at openjdk.org>
Date:      2025-12-04 15:00:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6f03c7808de2b07b1e501d05b1bb7d5bfde5e393

8360702: runtime/Thread/AsyncExceptionTest.java timed out

Reviewed-by: dholmes, fbredberg

! test/hotspot/jtreg/runtime/Thread/AsyncExceptionOnMonitorEnter.java
! test/hotspot/jtreg/runtime/Thread/AsyncExceptionTest.java

Changeset: 33dda887
Branch: master
Author:    Christoph Langer <clanger at openjdk.org>
Date:      2025-12-04 15:03:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/33dda887d99d39b2d003fd6521db97d45da474f0

8351842: Windows specific issues in combination of JEP 493 and --with-external-symbols-in-bundles=public

Reviewed-by: erikj, mbaesken

! make/Bundles.gmk
! make/Images.gmk
! make/hotspot/lib/CompileJvm.gmk
! src/hotspot/share/prims/whitebox.cpp
! test/hotspot/jtreg/runtime/NMT/CheckForProperDetailStackTrace.java
! test/jdk/jdk/modules/etc/JmodExcludedFiles.java
! test/lib/jdk/test/whitebox/WhiteBox.java

Changeset: 27351401
Branch: master
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-12-04 15:25:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2735140147b159d3a3238804f221db4f835ef744

8370939: C2: SIGSEGV in SafePointNode::verify_input when processing MH call from Compile::process_late_inline_calls_no_inline()

Reviewed-by: thartmann, vlivanov

! src/hotspot/share/opto/callGenerator.cpp
! src/hotspot/share/opto/callnode.cpp
! src/hotspot/share/opto/callnode.hpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/compile.hpp
+ test/hotspot/jtreg/compiler/inlining/TestLateMHClonedCallNode.java

Changeset: 45dcc0e7
Branch: master
Author:    Kurt Miller <kurt at openjdk.org>
Committer: Jayathirth D V <jdv at openjdk.org>
Date:      2025-12-04 16:59:03 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/45dcc0e7e26b8130236c5ba80edb54fa530dab57

8371914: PNG defines in CFLAGS can cause compilation errors with external libpng

Reviewed-by: erikj, jdv

! make/modules/java.desktop/lib/ClientLibraries.gmk

Changeset: c55287d1
Branch: master
Author:    Nizar Benalla <nbenalla at openjdk.org>
Committer: Jesper Wilhelmsson <jwilhelm at openjdk.org>
Date:      2025-12-04 17:01:41 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c55287d197ef024033f8dfbb5a365cb091bc67fb

8370890: Start of release updates for JDK 27
8370893: Add SourceVersion.RELEASE_27
8370894: Add source 27 and target 27 to javac

Reviewed-by: darcy, iris, liach, erikj, dholmes

! .jcheck/conf
! make/conf/version-numbers.conf
! src/hotspot/share/classfile/classFileParser.cpp
! src/java.base/share/classes/java/lang/classfile/ClassFile.java
! src/java.base/share/classes/java/lang/reflect/ClassFileFormatVersion.java
! src/java.compiler/share/classes/javax/lang/model/SourceVersion.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractTypeVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/AbstractTypeVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementKindVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementKindVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementScanner14.java
! src/java.compiler/share/classes/javax/lang/model/util/ElementScannerPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleAnnotationValueVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleAnnotationValueVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleElementVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleElementVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleTypeVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/SimpleTypeVisitorPreview.java
! src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitor14.java
! src/java.compiler/share/classes/javax/lang/model/util/TypeKindVisitorPreview.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Source.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassFile.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/processing/PrintingProcessor.java
+ src/jdk.compiler/share/data/symbols/java.base-Q.sym.txt
= src/jdk.compiler/share/data/symbols/java.compiler-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.desktop-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.management-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.net.http-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.httpserver-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.incubator.vector-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jartool-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jdeps-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.jfr-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jlink-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.jshell-Q.sym.txt
= src/jdk.compiler/share/data/symbols/jdk.jsobject-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.localedata-Q.sym.txt
! src/jdk.compiler/share/data/symbols/symbols
! test/jdk/ProblemList.txt
! test/langtools/tools/javac/api/TestGetSourceVersions.java
! test/langtools/tools/javac/classfiles/ClassVersionChecker.java
! test/langtools/tools/javac/lib/JavacTestingAbstractProcessor.java
! test/langtools/tools/javac/preview/classReaderTest/Client.nopreview.out
! test/langtools/tools/javac/preview/classReaderTest/Client.preview.out
! test/langtools/tools/javac/versions/Versions.java

Changeset: c7aa1033
Branch: master
Author:    Justin Lu <jlu at openjdk.org>
Date:      2025-12-04 18:34:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c7aa10339aa40d37dc52e6dcec102f8dca114634

8372844: Improve usage of test/jdk/java/text/testlib/TestUtils.java locale methods

Reviewed-by: naoto

! test/jdk/java/text/Format/DateFormat/Bug4407042.java
! test/jdk/java/text/Format/DateFormat/Bug4845901.java
! test/jdk/java/text/Format/DateFormat/Bug6530336.java
! test/jdk/java/text/Format/DateFormat/DateFormatRegression.java
! test/jdk/java/text/Format/MessageFormat/MessageRegression.java
! test/jdk/java/text/Format/NumberFormat/NumberRegression.java
! test/jdk/java/util/Calendar/CalendarLimitTest.java
! test/jdk/java/util/Calendar/CalendarRegression.java
! test/jdk/java/util/Calendar/CalendarTest.java
! test/jdk/java/util/Calendar/bug4409072.java
! test/jdk/java/util/Locale/LocaleCategory.java
! test/jdk/java/util/TimeZone/TimeZoneRegression.java

Changeset: b19163b1
Branch: master
Author:    Matthew Donovan <mdonovan at openjdk.org>
Date:      2025-12-04 18:38:57 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b19163b107584118056073dc24a960ca04ca14e4

8356544: Implement additional tests for ciphersuites disabled with wildcards

Reviewed-by: rhalade

+ test/jdk/sun/security/ssl/CipherSuite/DisabledCipherSuitesNotNegotiated.java

Changeset: ef7532e7
Branch: master
Author:    Mikhail Yankelevich <myankelevich at openjdk.org>
Date:      2025-12-04 18:41:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ef7532e7e625628d6181c65116804ebb65f18061

8367994: test/jdk/sun/security/pkcs11/Signature/ tests pass when they should skip

Reviewed-by: rhalade

! test/jdk/sun/security/pkcs11/Signature/InitAgainPSS.java
! test/jdk/sun/security/pkcs11/Signature/KeyAndParamCheckForPSS.java
! test/jdk/sun/security/pkcs11/Signature/SigInteropPSS.java
! test/jdk/sun/security/pkcs11/Signature/SigInteropPSS2.java
! test/jdk/sun/security/pkcs11/Signature/SignatureTestPSS.java
! test/jdk/sun/security/pkcs11/Signature/SignatureTestPSS2.java
! test/jdk/sun/security/pkcs11/Signature/TestDSA.java

Changeset: 8e653d39
Branch: master
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-04 20:17:02 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8e653d394e45180e16714124ed6584f912eb5cba

8373099: Problem list intermittently failing test sun/awt/image/bug8038000.java

Reviewed-by: dholmes

! test/jdk/ProblemList.txt

Changeset: 5ec5a6ea
Branch: master
Author:    Ben Taylor <btaylor at openjdk.org>
Committer: William Kemper <wkemper at openjdk.org>
Date:      2025-12-04 21:37:09 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5ec5a6ea6c8e887b4e21f81e382f57129bffbab8

8373054: Shenandoah: Remove unnecessary BarrierSetNMethod::arm in shenandoahCodeRoots

Reviewed-by: wkemper, ysr, shade

! src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp

Changeset: c8b30da7
Branch: master
Author:    Ben Taylor <btaylor at openjdk.org>
Committer: Y. Srinivas Ramakrishna <ysr at openjdk.org>
Date:      2025-12-04 22:11:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c8b30da7ef48edb3d43e07d2c1b8622d8123c3a9

8373039: Remove Incorrect Asserts in shenandoahScanRemembered

Reviewed-by: wkemper, ysr, xpeng

! src/hotspot/share/gc/shenandoah/shenandoahScanRemembered.cpp

Changeset: 6db1c4f5
Branch: master
Author:    Coleen Phillimore <coleenp at openjdk.org>
Date:      2025-12-04 22:34:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6db1c4f5b93a1b7f7d9da36745dc433c9985a169

8371409: Wrong lock ordering between FullGCALot_lock and ThreadsLockThrottle_lock/MethodCompileQueue_lock

Reviewed-by: rehn, pchilanomate

! src/hotspot/share/memory/universe.cpp
! src/hotspot/share/runtime/mutexLocker.cpp

Changeset: 13e32bf1
Branch: master
Author:    Coleen Phillimore <coleenp at openjdk.org>
Date:      2025-12-04 22:39:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/13e32bf1667a3be8492d1e4e3a273951202acd9c

8372098: Move AccessFlags to InstanceKlass

Reviewed-by: liach, vlivanov, dlong, sspitsyn

! src/hotspot/share/ci/ciInstanceKlass.hpp
! src/hotspot/share/ci/ciKlass.cpp
! src/hotspot/share/ci/ciKlass.hpp
! src/hotspot/share/classfile/defaultMethods.cpp
! src/hotspot/share/classfile/javaClasses.cpp
! src/hotspot/share/classfile/systemDictionary.cpp
! src/hotspot/share/jvmci/vmStructs_jvmci.cpp
! src/hotspot/share/oops/arrayKlass.cpp
! src/hotspot/share/oops/fieldInfo.hpp
! src/hotspot/share/oops/instanceKlass.cpp
! src/hotspot/share/oops/instanceKlass.hpp
! src/hotspot/share/oops/klass.cpp
! src/hotspot/share/oops/klass.hpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/memnode.cpp
! src/hotspot/share/runtime/vmStructs.cpp
! src/hotspot/share/utilities/accessFlags.hpp
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/InstanceKlass.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/Klass.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/ObjectHeap.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/ConcurrentLocksPrinter.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/tools/ClassLoaderStats.java
! src/jdk.internal.vm.ci/share/classes/jdk/vm/ci/hotspot/HotSpotResolvedObjectTypeImpl.java
! src/jdk.internal.vm.ci/share/classes/jdk/vm/ci/hotspot/HotSpotVMConfig.java

Changeset: 15f25389
Branch: master
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-04 23:56:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/15f25389435288881644f7aeab48fd2eae410999

8373056: Shenandoah: Remove unnecessary use of ShenandoahAllocRequest.type()

Reviewed-by: wkemper, kdnilsen

! src/hotspot/share/gc/shenandoah/shenandoahAllocRequest.hpp
! src/hotspot/share/gc/shenandoah/shenandoahFreeSet.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.hpp
! src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.inline.hpp
! src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.cpp

Changeset: 7e91d34f
Branch: master
Author:    Anjian Wen <wenanjian at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
Date:      2025-12-05 02:51:13 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7e91d34f3e83b4c39d6ce5de34373d7d74d54512

8365732: RISC-V: implement AES CTR intrinsics

Reviewed-by: fyang, mli

! src/hotspot/cpu/riscv/stubGenerator_riscv.cpp
! src/hotspot/cpu/riscv/vm_version_riscv.cpp

Changeset: 674cc3ee
Branch: master
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-05 03:30:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/674cc3eeca77f1f2a6d937b1df5c5cd8a13c2d31

8042054: JTree.updateUI uses out-of-date item size information

Reviewed-by: dnguyen, serb

! src/java.desktop/share/classes/javax/swing/JTree.java
+ test/jdk/javax/swing/JTree/JTreeUpdateTest.java

Changeset: b9339690
Branch: master
Author:    duke <duke at openjdk.org>
Date:      2025-12-05 11:02:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b9339690c01aad5d933f987f7fc827953fe9e70e

Automatic merge of jdk:master into master

! .jcheck/conf
! .jcheck/conf


From stuart.monteith at arm.com  Fri Dec  5 19:52:04 2025
From: stuart.monteith at arm.com (Stuart Monteith)
Date: Fri, 5 Dec 2025 19:52:04 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
Message-ID: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>

Hello,
	I have encountered a scaling problem with java.lang.foreign.MemorySegments when they are passed to native code. When 
native methods are called with, say, around more than 8 cores with MemorySegments allocated from an Arena allocated from 
Arena.ofShared(), scaling can be sublinear under contention.

 From profiling, it is apparent that excessive time is being spent in jdk.internal.foreign.SharedSession's acquire0 and 
release0 methods. These methods check and increment or decrement the acquireCount field, which is used to prevent the 
SharedSession from being closed if the acquireCount is not zero. it is also used to prevent acquire0 from succeeding if 
the acquireCount is already closed.

The issue can be demonstrated with the micro benchmark:
   org.openjdk.bench.java.lang.foreign. CallOverheadConstant.panama_identity_memory_address_shared_3

It produces the following results on the Neoverse-N1, N2, V1 and V2, Intel Xeon 8375c and the AMD Epyc 9654.

Each machine has >48 cores, and the results are in nanoseconds:

Threads    N1        N2        V1        V2        Xeon       Epyc
1          30.88     32.15     33.54     32.82     27.46      8.45
2         142.56    134.48    132.01    131.50    116.68     46.53
4         310.18    282.75    287.59    271.82    251.88     86.11
8         702.02    710.29    736.72    670.63    533.46    194.60
16      1,436.17  1,684.80  1,833.69  1,782.78  1,100.15    827.28
24      2,185.55  2,508.86  2,732.22  2,815.26  1,646.09  1,530.28
32      2,942.48  3,432.84  3,643.64  3,782.23  2,236.81  2,278.52
48      4,466.56  5,174.72  5,401.95  5,621.41  4,926.30  3,026.58

The microbenchmark is repeatedly calling a small native method, so the timings demonstrate the worst case. With perfect 
scaling, the timing should be the same for 48 threads on 48 cores as it is for 1 thread on 1 core.

The solution I came up with is here: https://github.com/openjdk/jdk/pull/28575
It was suggested that it would have been better to have first discussed the issue here, but it was useful me to try and 
solve the issue first in order to understand the code.

The fundamental issue is producing a counter that can scale while ensuring races between acquires and closes behave 
correctly. To address this, I opted to use multiple counters, with at least as many counters as there are CPUs on the 
machine. The current thread's hashcode is used to select a counter. The counters are allocated in an AtomicIntegerArray, 
and are spaced such that they lie on their own cache-line.

The API has been changed such that acquire0 returns an int  - a ticket that needs to be passed to the corresponding 
release0(int) method. This was necessary as there is code where they are executed on separate threads, which would 
results in separate counters being incremented then decremented. The changes are quite widespread because of this.
If the original release0() method is kept, and the counter recalculated instead of being passed as a ticket, there are 
fewer changes, but perhaps an increased risk of bugs being introduced.

The SharedSession.justClose() method will either successfully close and racing acquires will fail, or vice-verse. In 
order to do this, there are two phases, such that the counters are put into a "closing" state if they can. Racing 
acquires will spin on this state. If the close comes across an counter in use, it will set the counters in the "closing" 
state to open, and then fail. Otherwise all of the counters in "closing" state are committed to "closed" state and any 
threads spinning in "acquire" will receive the IllegalStateException indicating that the SharedSession have been closed.

The PR above produces the following results on the same benchmark and machines:

Threads    N1      N2        V1        V2        Xeon      Epyc
1          32.41   32.11     34.43     31.32     27.94     9.82
2          32.64   33.72     35.11     31.30     28.02     9.81
4          32.71   36.84     34.67     31.35     28.12    10.49
8          58.22   31.60     36.87     31.72     47.09    16.52
16         70.15   47.76     52.37     47.26     70.91    14.53
24         77.38   78.14     81.67     71.98     87.20    21.70
32         87.54   98.01     84.73     86.79    109.25    22.65
48        121.54  128.14    120.51    104.35    175.08    26.85

In a more complex workload, we were seeing up to 3x better performance, rather than 40x as contention will typically be 
lower than that in the microbenchmark presented here.

The PR changes code quite outside its immediate area, and adds some complexity, different timing and more memory 
overhead, particularly on machines with large core counts. There is also a reliance of the threads involved hashing well 
to avoid contention. Closing may also take more time on machines with large core-counts. I wouldn't anticipate threads 
spinning in acquire0 during closing to be an issue as well-written programs should close when the SharedSession is 
unused. There is a small cost in the uncontended, single threaded benchmark on the order or 1-2ns.

Programmer's might instead be advised to use Shared.ofAuto() if contention is the biggest issue, however this may 
introduce a delay when freeing resources.


In terms of alternatives in the literature, there is the paper "Scalable Reader-Writer Locks" (Lev, Luchangco, 
Olszewski, 2009) introduces C-SNZI, which has the concept of a "Closeable, Scalable Non-Zero Indicator". It does require 
more complex data-structures that have to be traversed in a fashion that may be slower than the SharedSession 
implemention today.

I look forward to hearing peoples thoughts.

Stuart





From maurizio.cimadamore at oracle.com  Mon Dec  8 12:13:50 2025
From: maurizio.cimadamore at oracle.com (Maurizio Cimadamore)
Date: Mon, 8 Dec 2025 12:13:50 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
Message-ID: <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>

Hi Stuart,
I believe your suggested approach is a good idea to consider. Splitting 
the acquire/release counters seems like a good idea and one that, to 
some extent, as also been used elsewhere (e.g. LongAdder, 
ConcurrentHashMap) to improve throughput under contention.

The "tricky bit" is to make sure we can do all this while retaining 
correctness, as this is an already very tricky part of the code.

In the next few weeks we'll look at the code you wrote in more details 
and try to flesh out potential issues.

This problem is quite similar to a read/write lock scenario (as you also 
mention):

* the threads doing the acquires/release are effectively expressing a 
desire to "read" a segment in a given piece of code. So, multiple 
readers can co-exist.
* the thread doing the close is effectively expressing a desire to 
"write" the segment -- so it should only be allowed to do so when 
there's no readers.

In principle, something like this

https://docs.oracle.com/en/java/javase/25/docs/api//java.base/java/util/concurrent/locks/StampedLock.html

Should work quite well for this use cases. Or, even using a LongAdder as 
an acquire/release counter:

https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/concurrent/atomic/LongAdder.html

Note the javadoc on this class:

 >This class is usually preferable to |AtomicLong| 
<https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/concurrent/atomic/AtomicLong.html> 
when multiple threads update a common sum that is used for purposes such 
as collecting statistics, not for fine-grained synchronization control. 
Under low update contention, the two classes have similar 
characteristics. But under high contention, expected throughput of this 
class is significantly higher, at the expense of higher space consumption.

This should in principle guarantee superior performance under contention 
(similar to what you did). But, no matter the road taken, doing so 
requires separating the liveness bit from the acquire count -- and 
that's what need to be analyzed more carefully (e.g. this means making 
the acquire fail when the segment is closed, or about to be closed).

Thanks!
Maurizio

On 05/12/2025 19:52, Stuart Monteith wrote:
> Hello,
> ????I have encountered a scaling problem with 
> java.lang.foreign.MemorySegments when they are passed to native code. 
> When native methods are called with, say, around more than 8 cores 
> with MemorySegments allocated from an Arena allocated from 
> Arena.ofShared(), scaling can be sublinear under contention.
>
> From profiling, it is apparent that excessive time is being spent in 
> jdk.internal.foreign.SharedSession's acquire0 and release0 methods. 
> These methods check and increment or decrement the acquireCount field, 
> which is used to prevent the SharedSession from being closed if the 
> acquireCount is not zero. it is also used to prevent acquire0 from 
> succeeding if the acquireCount is already closed.
>
> The issue can be demonstrated with the micro benchmark:
> ? org.openjdk.bench.java.lang.foreign. 
> CallOverheadConstant.panama_identity_memory_address_shared_3
>
> It produces the following results on the Neoverse-N1, N2, V1 and V2, 
> Intel Xeon 8375c and the AMD Epyc 9654.
>
> Each machine has >48 cores, and the results are in nanoseconds:
>
> Threads??? N1??????? N2??????? V1??????? V2??????? Xeon?????? Epyc
> 1????????? 30.88???? 32.15???? 33.54???? 32.82???? 27.46????? 8.45
> 2???????? 142.56??? 134.48??? 132.01??? 131.50??? 116.68???? 46.53
> 4???????? 310.18??? 282.75??? 287.59??? 271.82??? 251.88???? 86.11
> 8???????? 702.02??? 710.29??? 736.72??? 670.63??? 533.46??? 194.60
> 16????? 1,436.17? 1,684.80? 1,833.69? 1,782.78? 1,100.15??? 827.28
> 24????? 2,185.55? 2,508.86? 2,732.22? 2,815.26? 1,646.09? 1,530.28
> 32????? 2,942.48? 3,432.84? 3,643.64? 3,782.23? 2,236.81? 2,278.52
> 48????? 4,466.56? 5,174.72? 5,401.95? 5,621.41? 4,926.30? 3,026.58
>
> The microbenchmark is repeatedly calling a small native method, so the 
> timings demonstrate the worst case. With perfect scaling, the timing 
> should be the same for 48 threads on 48 cores as it is for 1 thread on 
> 1 core.
>
> The solution I came up with is here: 
> https://github.com/openjdk/jdk/pull/28575
> It was suggested that it would have been better to have first 
> discussed the issue here, but it was useful me to try and solve the 
> issue first in order to understand the code.
>
> The fundamental issue is producing a counter that can scale while 
> ensuring races between acquires and closes behave correctly. To 
> address this, I opted to use multiple counters, with at least as many 
> counters as there are CPUs on the machine. The current thread's 
> hashcode is used to select a counter. The counters are allocated in an 
> AtomicIntegerArray, and are spaced such that they lie on their own 
> cache-line.
>
> The API has been changed such that acquire0 returns an int? - a ticket 
> that needs to be passed to the corresponding release0(int) method. 
> This was necessary as there is code where they are executed on 
> separate threads, which would results in separate counters being 
> incremented then decremented. The changes are quite widespread because 
> of this.
> If the original release0() method is kept, and the counter 
> recalculated instead of being passed as a ticket, there are fewer 
> changes, but perhaps an increased risk of bugs being introduced.
>
> The SharedSession.justClose() method will either successfully close 
> and racing acquires will fail, or vice-verse. In order to do this, 
> there are two phases, such that the counters are put into a "closing" 
> state if they can. Racing acquires will spin on this state. If the 
> close comes across an counter in use, it will set the counters in the 
> "closing" state to open, and then fail. Otherwise all of the counters 
> in "closing" state are committed to "closed" state and any threads 
> spinning in "acquire" will receive the IllegalStateException 
> indicating that the SharedSession have been closed.
>
> The PR above produces the following results on the same benchmark and 
> machines:
>
> Threads??? N1????? N2??????? V1??????? V2??????? Xeon????? Epyc
> 1????????? 32.41?? 32.11???? 34.43???? 31.32???? 27.94???? 9.82
> 2????????? 32.64?? 33.72???? 35.11???? 31.30???? 28.02???? 9.81
> 4????????? 32.71?? 36.84???? 34.67???? 31.35???? 28.12??? 10.49
> 8????????? 58.22?? 31.60???? 36.87???? 31.72???? 47.09??? 16.52
> 16???????? 70.15?? 47.76???? 52.37???? 47.26???? 70.91??? 14.53
> 24???????? 77.38?? 78.14???? 81.67???? 71.98???? 87.20??? 21.70
> 32???????? 87.54?? 98.01???? 84.73???? 86.79??? 109.25??? 22.65
> 48??????? 121.54? 128.14??? 120.51??? 104.35??? 175.08??? 26.85
>
> In a more complex workload, we were seeing up to 3x better 
> performance, rather than 40x as contention will typically be lower 
> than that in the microbenchmark presented here.
>
> The PR changes code quite outside its immediate area, and adds some 
> complexity, different timing and more memory overhead, particularly on 
> machines with large core counts. There is also a reliance of the 
> threads involved hashing well to avoid contention. Closing may also 
> take more time on machines with large core-counts. I wouldn't 
> anticipate threads spinning in acquire0 during closing to be an issue 
> as well-written programs should close when the SharedSession is 
> unused. There is a small cost in the uncontended, single threaded 
> benchmark on the order or 1-2ns.
>
> Programmer's might instead be advised to use Shared.ofAuto() if 
> contention is the biggest issue, however this may introduce a delay 
> when freeing resources.
>
>
> In terms of alternatives in the literature, there is the paper 
> "Scalable Reader-Writer Locks" (Lev, Luchangco, Olszewski, 2009) 
> introduces C-SNZI, which has the concept of a "Closeable, Scalable 
> Non-Zero Indicator". It does require more complex data-structures that 
> have to be traversed in a fashion that may be slower than the 
> SharedSession implemention today.
>
> I look forward to hearing peoples thoughts.
>
> Stuart
>
>
>
>
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From stuart.monteith at arm.com  Mon Dec  8 17:05:33 2025
From: stuart.monteith at arm.com (Stuart Monteith)
Date: Mon, 8 Dec 2025 17:05:33 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
Message-ID: <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>

On 08/12/2025 12:13, Maurizio Cimadamore wrote:
> Hi Stuart,
> I believe your suggested approach is a good idea to consider. Splitting the acquire/release counters seems like a good 
> idea and one that, to some extent, as also been used elsewhere (e.g. LongAdder, ConcurrentHashMap) to improve throughput 
> under contention.
> 
> The "tricky bit" is to make sure we can do all this while retaining correctness, as this is an already very tricky part 
> of the code.

Yes, the heart of the issue is maintaining correctness while scaling. My compromise was to produce something that had a 
resemblance to transaction memory, recognising that accounting for the state of multiple counters necessarily is spread 
through multiple memory operation.

> 
> In the next few weeks we'll look at the code you wrote in more details and try to flesh out potential issues.
> 
Thanks, I very much appreciate that.

> This problem is quite similar to a read/write lock scenario (as you also mention):
> 
> * the threads doing the acquires/release are effectively expressing a desire to "read" a segment in a given piece of 
> code. So, multiple readers can co-exist.
> * the thread doing the close is effectively expressing a desire to "write" the segment -- so it should only be allowed 
> to do so when there's no readers.
> 
> In principle, something like this
> 
> https://docs.oracle.com/en/java/javase/25/docs/api//java.base/java/util/concurrent/locks/StampedLock.html
> 
I experimented with StampedLock, but found that it scaled more or less the same as the existing implementation. 
acquire0() calls tryReadLock(), release0() calling tryUnlockRead() and justClose() calling tryWriteLock(). It appears 
the compare-and-swap operation is a bottleneck.

> Should work quite well for this use cases. Or, even using a LongAdder as an acquire/release counter:
> 
> https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/concurrent/atomic/LongAdder.html
> 
I found LongAdder/Striped64 interesting as, if necessary, we could look at how it is handling memory. The SharedSession 
code I wrote allocates memory upfront, such that a scenario with one thread would use as much memory as when there are 
128 threads on 128 cores. But besides that, getting the sum is not atomic, and neither is acting upon it. I experimented 
with  AtomicLong, with a close operation subtracting a very large value to force the counter negative, but that wasn't 
too different from before, dependent on atomic reads/writes to a single memory location.

> Note the javadoc on this class:
> 
>  >This class is usually preferable to |AtomicLong| <https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/ 
> util/concurrent/atomic/AtomicLong.html> when multiple threads update a common sum that is used for purposes such as 
> collecting statistics, not for fine-grained synchronization control. Under low update contention, the two classes have 
> similar characteristics. But under high contention, expected throughput of this class is significantly higher, at the 
> expense of higher space consumption.
> 
> This should in principle guarantee superior performance under contention (similar to what you did). But, no matter the 
> road taken, doing so requires separating the liveness bit from the acquire count -- and that's what need to be analyzed 
> more carefully (e.g. this means making the acquire fail when the segment is closed, or about to be closed).
> 

Indeed, atomically setting the count and liveness is really the issue - you can't atomically check and set the sum from 
LongAdder.


> Thanks!
> Maurizio
> 

Thanks,
	Stuart


> On 05/12/2025 19:52, Stuart Monteith wrote:
>> Hello,
>> ????I have encountered a scaling problem with java.lang.foreign.MemorySegments when they are passed to native code. 
>> When native methods are called with, say, around more than 8 cores with MemorySegments allocated from an Arena 
>> allocated from Arena.ofShared(), scaling can be sublinear under contention.
>>
>> From profiling, it is apparent that excessive time is being spent in jdk.internal.foreign.SharedSession's acquire0 and 
>> release0 methods. These methods check and increment or decrement the acquireCount field, which is used to prevent the 
>> SharedSession from being closed if the acquireCount is not zero. it is also used to prevent acquire0 from succeeding 
>> if the acquireCount is already closed.
>>
>> The issue can be demonstrated with the micro benchmark:
>> ? org.openjdk.bench.java.lang.foreign. CallOverheadConstant.panama_identity_memory_address_shared_3
>>
>> It produces the following results on the Neoverse-N1, N2, V1 and V2, Intel Xeon 8375c and the AMD Epyc 9654.
>>
>> Each machine has >48 cores, and the results are in nanoseconds:
>>
>> Threads??? N1??????? N2??????? V1??????? V2??????? Xeon?????? Epyc
>> 1????????? 30.88???? 32.15???? 33.54???? 32.82???? 27.46????? 8.45
>> 2???????? 142.56??? 134.48??? 132.01??? 131.50??? 116.68???? 46.53
>> 4???????? 310.18??? 282.75??? 287.59??? 271.82??? 251.88???? 86.11
>> 8???????? 702.02??? 710.29??? 736.72??? 670.63??? 533.46??? 194.60
>> 16????? 1,436.17? 1,684.80? 1,833.69? 1,782.78? 1,100.15??? 827.28
>> 24????? 2,185.55? 2,508.86? 2,732.22? 2,815.26? 1,646.09? 1,530.28
>> 32????? 2,942.48? 3,432.84? 3,643.64? 3,782.23? 2,236.81? 2,278.52
>> 48????? 4,466.56? 5,174.72? 5,401.95? 5,621.41? 4,926.30? 3,026.58
>>
>> The microbenchmark is repeatedly calling a small native method, so the timings demonstrate the worst case. With 
>> perfect scaling, the timing should be the same for 48 threads on 48 cores as it is for 1 thread on 1 core.
>>
>> The solution I came up with is here: https://github.com/openjdk/jdk/pull/28575
>> It was suggested that it would have been better to have first discussed the issue here, but it was useful me to try 
>> and solve the issue first in order to understand the code.
>>
>> The fundamental issue is producing a counter that can scale while ensuring races between acquires and closes behave 
>> correctly. To address this, I opted to use multiple counters, with at least as many counters as there are CPUs on the 
>> machine. The current thread's hashcode is used to select a counter. The counters are allocated in an 
>> AtomicIntegerArray, and are spaced such that they lie on their own cache-line.
>>
>> The API has been changed such that acquire0 returns an int? - a ticket that needs to be passed to the corresponding 
>> release0(int) method. This was necessary as there is code where they are executed on separate threads, which would 
>> results in separate counters being incremented then decremented. The changes are quite widespread because of this.
>> If the original release0() method is kept, and the counter recalculated instead of being passed as a ticket, there are 
>> fewer changes, but perhaps an increased risk of bugs being introduced.
>>
>> The SharedSession.justClose() method will either successfully close and racing acquires will fail, or vice-verse. In 
>> order to do this, there are two phases, such that the counters are put into a "closing" state if they can. Racing 
>> acquires will spin on this state. If the close comes across an counter in use, it will set the counters in the 
>> "closing" state to open, and then fail. Otherwise all of the counters in "closing" state are committed to "closed" 
>> state and any threads spinning in "acquire" will receive the IllegalStateException indicating that the SharedSession 
>> have been closed.
>>
>> The PR above produces the following results on the same benchmark and machines:
>>
>> Threads??? N1????? N2??????? V1??????? V2??????? Xeon????? Epyc
>> 1????????? 32.41?? 32.11???? 34.43???? 31.32???? 27.94???? 9.82
>> 2????????? 32.64?? 33.72???? 35.11???? 31.30???? 28.02???? 9.81
>> 4????????? 32.71?? 36.84???? 34.67???? 31.35???? 28.12??? 10.49
>> 8????????? 58.22?? 31.60???? 36.87???? 31.72???? 47.09??? 16.52
>> 16???????? 70.15?? 47.76???? 52.37???? 47.26???? 70.91??? 14.53
>> 24???????? 77.38?? 78.14???? 81.67???? 71.98???? 87.20??? 21.70
>> 32???????? 87.54?? 98.01???? 84.73???? 86.79??? 109.25??? 22.65
>> 48??????? 121.54? 128.14??? 120.51??? 104.35??? 175.08??? 26.85
>>
>> In a more complex workload, we were seeing up to 3x better performance, rather than 40x as contention will typically 
>> be lower than that in the microbenchmark presented here.
>>
>> The PR changes code quite outside its immediate area, and adds some complexity, different timing and more memory 
>> overhead, particularly on machines with large core counts. There is also a reliance of the threads involved hashing 
>> well to avoid contention. Closing may also take more time on machines with large core-counts. I wouldn't anticipate 
>> threads spinning in acquire0 during closing to be an issue as well-written programs should close when the 
>> SharedSession is unused. There is a small cost in the uncontended, single threaded benchmark on the order or 1-2ns.
>>
>> Programmer's might instead be advised to use Shared.ofAuto() if contention is the biggest issue, however this may 
>> introduce a delay when freeing resources.
>>
>>
>> In terms of alternatives in the literature, there is the paper "Scalable Reader-Writer Locks" (Lev, Luchangco, 
>> Olszewski, 2009) introduces C-SNZI, which has the concept of a "Closeable, Scalable Non-Zero Indicator". It does 
>> require more complex data-structures that have to be traversed in a fashion that may be slower than the SharedSession 
>> implemention today.
>>
>> I look forward to hearing peoples thoughts.
>>
>> Stuart
>>
>>
>>
>>


From maurizio.cimadamore at oracle.com  Mon Dec  8 17:31:17 2025
From: maurizio.cimadamore at oracle.com (Maurizio Cimadamore)
Date: Mon, 8 Dec 2025 17:31:17 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
Message-ID: <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>


>
>> This problem is quite similar to a read/write lock scenario (as you 
>> also mention):
>>
>> * the threads doing the acquires/release are effectively expressing a 
>> desire to "read" a segment in a given piece of code. So, multiple 
>> readers can co-exist.
>> * the thread doing the close is effectively expressing a desire to 
>> "write" the segment -- so it should only be allowed to do so when 
>> there's no readers.
>>
>> In principle, something like this
>>
>> https://docs.oracle.com/en/java/javase/25/docs/api//java.base/java/util/concurrent/locks/StampedLock.html 
>>
> I experimented with StampedLock, but found that it scaled more or less 
> the same as the existing implementation. acquire0() calls 
> tryReadLock(), release0() calling tryUnlockRead() and justClose() 
> calling tryWriteLock(). It appears the compare-and-swap operation is a 
> bottleneck.
Interesting -- thanks for sharing!
>
>> Should work quite well for this use cases. Or, even using a LongAdder 
>> as an acquire/release counter:
>>
>> https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/concurrent/atomic/LongAdder.html 
>>
> I found LongAdder/Striped64 interesting as, if necessary, we could 
> look at how it is handling memory. The SharedSession code I wrote 
> allocates memory upfront, such that a scenario with one thread would 
> use as much memory as when there are 128 threads on 128 cores. But 
> besides that, getting the sum is not atomic, and neither is acting 
> upon it. I experimented with? AtomicLong, with a close operation 
> subtracting a very large value to force the counter negative, but that 
> wasn't too different from before, dependent on atomic reads/writes to 
> a single memory location.

Yeah --- after I sent the message I realized that sum() is good enough 
for ensuring e.g. that when closing there's no pending acquire -- but 
not for the opposite: e.g. ensuring that acquire can't happen during a 
close... so it's weaker than a RW lock (but the internals use some 
redundancy to reduce contention, which is kind of what you also do here).

For the purpose of implementation clarity -- would it be useful to wrap 
the various counters plus logic to acquire/release (and "closing" state) 
into a separate abstraction, which is then used by SharedMemorySession? 
A sort of "atomic" LongAdder, if you will :-)

That might make it easier to verify the correctness of the 
implementation, by validating each aspect (the atomic long adder, and 
its use from SharedMemorySession) separately.

Cheers
Maurizio


From stuart.monteith at arm.com  Mon Dec  8 18:40:19 2025
From: stuart.monteith at arm.com (Stuart Monteith)
Date: Mon, 8 Dec 2025 18:40:19 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
Message-ID: <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>

On 08/12/2025 17:31, Maurizio Cimadamore wrote:
> 
>>
>>> This problem is quite similar to a read/write lock scenario (as you also mention):
>>>
>>> * the threads doing the acquires/release are effectively expressing a desire to "read" a segment in a given piece of 
>>> code. So, multiple readers can co-exist.
>>> * the thread doing the close is effectively expressing a desire to "write" the segment -- so it should only be 
>>> allowed to do so when there's no readers.
>>>
>>> In principle, something like this
>>>
>>> https://docs.oracle.com/en/java/javase/25/docs/api//java.base/java/util/concurrent/locks/StampedLock.html
>> I experimented with StampedLock, but found that it scaled more or less the same as the existing implementation. 
>> acquire0() calls tryReadLock(), release0() calling tryUnlockRead() and justClose() calling tryWriteLock(). It appears 
>> the compare-and-swap operation is a bottleneck.
> Interesting -- thanks for sharing!
>>
>>> Should work quite well for this use cases. Or, even using a LongAdder as an acquire/release counter:
>>>
>>> https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/util/concurrent/atomic/LongAdder.html
>> I found LongAdder/Striped64 interesting as, if necessary, we could look at how it is handling memory. The 
>> SharedSession code I wrote allocates memory upfront, such that a scenario with one thread would use as much memory as 
>> when there are 128 threads on 128 cores. But besides that, getting the sum is not atomic, and neither is acting upon 
>> it. I experimented with? AtomicLong, with a close operation subtracting a very large value to force the counter 
>> negative, but that wasn't too different from before, dependent on atomic reads/writes to a single memory location.
> 
> Yeah --- after I sent the message I realized that sum() is good enough for ensuring e.g. that when closing there's no 
> pending acquire -- but not for the opposite: e.g. ensuring that acquire can't happen during a close... so it's weaker 
> than a RW lock (but the internals use some redundancy to reduce contention, which is kind of what you also do here).
> 

sum() is really just a snapshot, it adds up the counters (Cells), so it wouldn't ensure the counter was at zero. 
Immediately after returning zero a thread could have already incremented it.

Striped64 uses JavaUtilConcurrentTLRAccess to get random number, which could be an improvement over using Thread.hashCode().


> For the purpose of implementation clarity -- would it be useful to wrap the various counters plus logic to acquire/ 
> release (and "closing" state) into a separate abstraction, which is then used by SharedMemorySession? A sort of "atomic" 
> LongAdder, if you will :-)
> 
> That might make it easier to verify the correctness of the implementation, by validating each aspect (the atomic long 
> adder, and its use from SharedMemorySession) separately.

Sure, that would be a bit cleaner, thanks.

> 
> Cheers
> Maurizio
> 


From maurizio.cimadamore at oracle.com  Mon Dec  8 18:42:34 2025
From: maurizio.cimadamore at oracle.com (Maurizio Cimadamore)
Date: Mon, 8 Dec 2025 18:42:34 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
Message-ID: <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>


> sum() is really just a snapshot, it adds up the counters (Cells), so 
> it wouldn't ensure the counter was at zero. Immediately after 
> returning zero a thread could have already incremented it.
Yes. What I mean is: you can check if close() should throw because of 
pending acquires. But, as I said, we can use that in any way to "block" 
other acquires from happening in case we _do_ want to close. Which 
leaves us exposed.
>
>
>> For the purpose of implementation clarity -- would it be useful to 
>> wrap the various counters plus logic to acquire/ release (and 
>> "closing" state) into a separate abstraction, which is then used by 
>> SharedMemorySession? A sort of "atomic" LongAdder, if you will :-)
>>
>> That might make it easier to verify the correctness of the 
>> implementation, by validating each aspect (the atomic long adder, and 
>> its use from SharedMemorySession) separately.
>
> Sure, that would be a bit cleaner, thanks.

Thanks.


Maurizio

From mr.chrisvest at gmail.com  Mon Dec  8 19:45:05 2025
From: mr.chrisvest at gmail.com (Chris Vest)
Date: Mon, 8 Dec 2025 11:45:05 -0800
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
 <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
Message-ID: <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>

For what it's worth, in Netty we implement our reference counting with
incrementing by 2 instead of 1, and use the low odd bit to indicate the
released state.
This allows us to acquire using getAndAdd, which scales much better than a
CAS loop.
Unfortunately we still need to use a CAS loop when implementing release, so
that still has contention problems.

For reference:
https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/src/main/java/io/netty/util/internal/RefCnt.java#L258-L295

On Mon, Dec 8, 2025 at 10:42?AM Maurizio Cimadamore <
maurizio.cimadamore at oracle.com> wrote:

>
> > sum() is really just a snapshot, it adds up the counters (Cells), so
> > it wouldn't ensure the counter was at zero. Immediately after
> > returning zero a thread could have already incremented it.
> Yes. What I mean is: you can check if close() should throw because of
> pending acquires. But, as I said, we can use that in any way to "block"
> other acquires from happening in case we _do_ want to close. Which
> leaves us exposed.
> >
> >
> >> For the purpose of implementation clarity -- would it be useful to
> >> wrap the various counters plus logic to acquire/ release (and
> >> "closing" state) into a separate abstraction, which is then used by
> >> SharedMemorySession? A sort of "atomic" LongAdder, if you will :-)
> >>
> >> That might make it easier to verify the correctness of the
> >> implementation, by validating each aspect (the atomic long adder, and
> >> its use from SharedMemorySession) separately.
> >
> > Sure, that would be a bit cleaner, thanks.
>
> Thanks.
>
>
> Maurizio
>
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From stuart.monteith at arm.com  Wed Dec 10 14:48:09 2025
From: stuart.monteith at arm.com (Stuart Monteith)
Date: Wed, 10 Dec 2025 14:48:09 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
 <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
 <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>
Message-ID: <60305e66-b7da-42e8-883c-a443fdaebfed@arm.com>

Thanks Chris,
	I've taken a look and implemented SharedSession with something similar to your RefCnt. One of the differences with 
SharedSession is that we have a separate close method. I can implement acquire0 with getAndAdd(2), release0 with 
getAndAdd(-2) and close with compareAndSwap(0, 1). With the additional tests against 0x80000001 for acquire0 and 
release0, I have something that passes the unit tests for java/foreign.

The benchmarking is quite promising, but I'll need to look more closely at it - it doesn't scale better on all platforms.

Thanks,
	Stuart




On 08/12/2025 19:45, Chris Vest wrote:
> For what it's worth, in Netty we implement our reference counting with incrementing by 2 instead of 1, and use the low 
> odd bit to indicate the released state.
> This allows us to acquire using getAndAdd, which scales much better than a CAS loop.
> Unfortunately we still need to use a CAS loop when implementing release, so that still has contention problems.
> 
> For reference: https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/src/main/java/io/ 
> netty/util/internal/RefCnt.java#L258-L295 <https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/ 
> common/src/main/java/io/netty/util/internal/RefCnt.java#L258-L295>
> 
> On Mon, Dec 8, 2025 at 10:42?AM Maurizio Cimadamore <maurizio.cimadamore at oracle.com 
> <mailto:maurizio.cimadamore at oracle.com>> wrote:
> 
> 
>      > sum() is really just a snapshot, it adds up the counters (Cells), so
>      > it wouldn't ensure the counter was at zero. Immediately after
>      > returning zero a thread could have already incremented it.
>     Yes. What I mean is: you can check if close() should throw because of
>     pending acquires. But, as I said, we can use that in any way to "block"
>     other acquires from happening in case we _do_ want to close. Which
>     leaves us exposed.
>      >
>      >
>      >> For the purpose of implementation clarity -- would it be useful to
>      >> wrap the various counters plus logic to acquire/ release (and
>      >> "closing" state) into a separate abstraction, which is then used by
>      >> SharedMemorySession? A sort of "atomic" LongAdder, if you will :-)
>      >>
>      >> That might make it easier to verify the correctness of the
>      >> implementation, by validating each aspect (the atomic long adder, and
>      >> its use from SharedMemorySession) separately.
>      >
>      > Sure, that would be a bit cleaner, thanks.
> 
>     Thanks.
> 
> 
>     Maurizio
> 


From maurizio.cimadamore at oracle.com  Wed Dec 10 16:21:29 2025
From: maurizio.cimadamore at oracle.com (Maurizio Cimadamore)
Date: Wed, 10 Dec 2025 16:21:29 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <60305e66-b7da-42e8-883c-a443fdaebfed@arm.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
 <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
 <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>
 <60305e66-b7da-42e8-883c-a443fdaebfed@arm.com>
Message-ID: <5377e995-e0e2-4477-a7ac-ea7178dfba47@oracle.com>

What I like (a lot) about this is that now we're back to using the same 
"bit" of information for both liveness and acquire count (IIUC). If 
that's the case, it would be much simpler to convince ourselves this is 
correct.

Thanks
Maurizio

On 10/12/2025 14:48, Stuart Monteith wrote:
> Thanks Chris,
> ????I've taken a look and implemented SharedSession with something 
> similar to your RefCnt. One of the differences with SharedSession is 
> that we have a separate close method. I can implement acquire0 with 
> getAndAdd(2), release0 with getAndAdd(-2) and close with 
> compareAndSwap(0, 1). With the additional tests against 0x80000001 for 
> acquire0 and release0, I have something that passes the unit tests for 
> java/foreign.
>
> The benchmarking is quite promising, but I'll need to look more 
> closely at it - it doesn't scale better on all platforms.
>
> Thanks,
> ????Stuart
>
>
>
>
> On 08/12/2025 19:45, Chris Vest wrote:
>> For what it's worth, in Netty we implement our reference counting 
>> with incrementing by 2 instead of 1, and use the low odd bit to 
>> indicate the released state.
>> This allows us to acquire using getAndAdd, which scales much better 
>> than a CAS loop.
>> Unfortunately we still need to use a CAS loop when implementing 
>> release, so that still has contention problems.
>>
>> For reference: 
>> https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/src/main/java/io/__;!!ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$ 
>> netty/util/internal/RefCnt.java#L258-L295 
>> <https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!!ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$ 
>> common/src/main/java/io/netty/util/internal/RefCnt.java#L258-L295>
>>
>> On Mon, Dec 8, 2025 at 10:42?AM Maurizio Cimadamore 
>> <maurizio.cimadamore at oracle.com 
>> <mailto:maurizio.cimadamore at oracle.com>> wrote:
>>
>>
>> ???? > sum() is really just a snapshot, it adds up the counters 
>> (Cells), so
>> ???? > it wouldn't ensure the counter was at zero. Immediately after
>> ???? > returning zero a thread could have already incremented it.
>> ??? Yes. What I mean is: you can check if close() should throw 
>> because of
>> ??? pending acquires. But, as I said, we can use that in any way to 
>> "block"
>> ??? other acquires from happening in case we _do_ want to close. Which
>> ??? leaves us exposed.
>> ???? >
>> ???? >
>> ???? >> For the purpose of implementation clarity -- would it be 
>> useful to
>> ???? >> wrap the various counters plus logic to acquire/ release (and
>> ???? >> "closing" state) into a separate abstraction, which is then 
>> used by
>> ???? >> SharedMemorySession? A sort of "atomic" LongAdder, if you 
>> will :-)
>> ???? >>
>> ???? >> That might make it easier to verify the correctness of the
>> ???? >> implementation, by validating each aspect (the atomic long 
>> adder, and
>> ???? >> its use from SharedMemorySession) separately.
>> ???? >
>> ???? > Sure, that would be a bit cleaner, thanks.
>>
>> ??? Thanks.
>>
>>
>> ??? Maurizio
>>
>

From duke at openjdk.org  Fri Dec 12 11:10:25 2025
From: duke at openjdk.org (duke)
Date: Fri, 12 Dec 2025 11:10:25 GMT
Subject: git: openjdk/panama-foreign: foreign-memaccess+abi: 79 new changesets
Message-ID: <873dec3e-7c46-4401-b1d3-b7273708d542@openjdk.org>

Changeset: c09167df
Branch: foreign-memaccess+abi
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-05 14:01:36 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c09167df60f44642492ec20f133713388f4802ad

8373113: Fix whitespace in RunTests.gmk

Reviewed-by: tbell

! make/RunTests.gmk

Changeset: ee0b8a72
Branch: foreign-memaccess+abi
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-05 15:39:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ee0b8a72c64f7ac5058dbe5b2062cb35b6195484

8373102: com/sun/jdi/MethodInvokeWithTraceOnTest.java can fail with ObjectCollectedException when run with a small heap

Reviewed-by: amenkov, sspitsyn

! src/jdk.jdi/share/classes/com/sun/tools/jdi/EventSetImpl.java
! test/jdk/ProblemList.txt

Changeset: 4d696d0d
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-05 15:46:07 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/4d696d0d0ed523e3c99c68214586673913b1c7b5

8373086: Make isexceeded001.java more robust

Reviewed-by: jsikstro, tschatzl

! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/MemoryPoolMBean/isUsageThresholdExceeded/isexceeded001.java

Changeset: 520c092a
Branch: foreign-memaccess+abi
Author:    Neha Joshi <neha.j.joshi at oracle.com>
Committer: Rajan Halade <rhalade at openjdk.org>
Date:      2025-12-05 16:46:26 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/520c092a658559a5d65f06a51061db3aae09931e

8362658: sun/security/ssl/SSLEngineImpl/* tests duplicate jvm flags

Co-authored-by: Lei Zhu <korov9.c at gmail.com>
Reviewed-by: myankelevich, rhalade

! test/jdk/ProblemList-jvmti-stress-agent.txt
! test/jdk/sun/security/ssl/SSLEngineImpl/SSLEngineKeyLimit.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTClient.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTNoSessionCreation.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTParallel.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTSequence.java
! test/jdk/sun/security/ssl/SSLSessionImpl/ResumptionUpdateBoundValues.java
! test/jdk/sun/security/ssl/SSLSocketImpl/SSLSocketKeyLimit.java

Changeset: a20b7eb9
Branch: foreign-memaccess+abi
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2025-12-05 17:35:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a20b7eb943c19f9852bfaaec1fbbff647f1f5273

8373125: Add defensive screening of modifiers for Field and Parameter toString() results

Reviewed-by: alanb, liach

! src/java.base/share/classes/java/lang/reflect/Field.java
! src/java.base/share/classes/java/lang/reflect/Parameter.java
! test/jdk/java/lang/reflect/Modifier/toStringTest.java

Changeset: 43787890
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-05 19:17:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/43787890291d71de61b28b8a4e3bf9aaba46757a

8373145: [BACKOUT] Remove ThreadLocalAllocBuffer::_reserve_for_allocation_prefetch

Reviewed-by: mdoerr, kvn

! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/share/gc/shared/threadLocalAllocBuffer.cpp
! src/hotspot/share/gc/shared/threadLocalAllocBuffer.hpp
! src/hotspot/share/opto/macro.cpp
! src/hotspot/share/runtime/vmStructs.cpp
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/ThreadLocalAllocBuffer.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/VM.java

Changeset: f3dd8daa
Branch: foreign-memaccess+abi
Author:    Brent Christian <bchristi at openjdk.org>
Date:      2025-12-05 19:30:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f3dd8daaa92896be51254e5abf3e0ec5b1ff5173

8371748: Remove the (empty) ThreadPoolExecutor.finalize() method

Reviewed-by: vklang, jpai, alanb

! src/java.base/share/classes/java/util/concurrent/ThreadPoolExecutor.java

Changeset: be8cbfa6
Branch: foreign-memaccess+abi
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-05 20:37:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/be8cbfa6129d19403c9871c22721b902856f1886

8362083: JDI VirtualMachine/dispose/dispose001 failed with FATAL ERROR in native method: JDWP cannot set thread local storage, jvmtiError=JVMTI_ERROR_WRONG_PHASE(112)

Reviewed-by: lmesnik, sspitsyn, amenkov

! src/jdk.jdwp.agent/share/native/libjdwp/threadControl.c

Changeset: 2596608b
Branch: foreign-memaccess+abi
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-05 21:20:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2596608ba1bb1b271dfa062bf732a5095e22fffd

8370846: Support execution of mlvm testing with test thread factory

Reviewed-by: cjplummer

! test/hotspot/jtreg/vmTestbase/vm/mlvm/share/jdi/JDIBreakpointTest.java
! test/lib/jdk/test/lib/thread/TestThreadFactory.java

Changeset: b0f59f60
Branch: foreign-memaccess+abi
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-06 00:02:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b0f59f6021a00dc569e08810b34db21553a5b68d

8373127: Update nsk/monitoring tests to support virtual thread factory testing

Reviewed-by: kevinw, amenkov

! test/hotspot/jtreg/vmTestbase/nsk/monitoring/MemoryUsage/from/from001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/from_c/from_c001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/getLockName/getlockname001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/getLockOwnerName/getlockownername001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/isInNative/isinnative001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadMXBean/GetThreadAllocatedBytes/BaseBehaviorTest.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadMXBean/GetThreadCpuTime/BaseBehaviorTest.java

Changeset: 5f083aba
Branch: foreign-memaccess+abi
Author:    Patrick Strawderman <pstrawderman at netflix.com>
Committer: Viktor Klang <vklang at openjdk.org>
Date:      2025-12-06 15:34:14 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5f083abafc7abfaa46ddd053668cdfbfd2ad8a87

8179918: EnumSet spliterator should report SORTED, ORDERED, NONNULL

Reviewed-by: vklang

! src/java.base/share/classes/java/util/EnumSet.java
+ test/jdk/java/util/EnumSet/EnumSetSpliteratorTest.java

Changeset: 7da91533
Branch: foreign-memaccess+abi
Author:    Sergey Chernyshev <schernyshev at openjdk.org>
Committer: Volkan Yazici <vyazici at openjdk.org>
Date:      2025-12-08 09:06:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7da91533aaf2033cedee6e2a56fb693f26909df5

8369950: TLS connection to IPv6 address fails with BCJSSE due to IllegalArgumentException

Co-authored-by: Mikhail Yankelevich <myankelevich at openjdk.org>
Reviewed-by: djelinski, vyazici, dfuchs, myankelevich

! src/java.base/share/classes/sun/net/www/protocol/https/HttpsClient.java
+ test/jdk/javax/net/ssl/HttpsURLConnection/SubjectAltNameIP.java

Changeset: 35001508
Branch: foreign-memaccess+abi
Author:    Jan Lahoda <jlahoda at openjdk.org>
Date:      2025-12-08 10:04:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/350015088281eb9e6e9e3a9811f38adac5f7a975

8373094: javac may fail because of unattributed break in a loop

Reviewed-by: vromero

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
! test/langtools/tools/javac/recovery/AttrRecovery.java

Changeset: a6594794
Branch: foreign-memaccess+abi
Author:    Francesco Andreuzzi <fandreuzzi at openjdk.org>
Date:      2025-12-08 11:45:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a6594794839807d56434d6f28fe3d581fb1e36c0

8367541: Parallel: Make young and old generation fields nonstatic in ParallelScavengeHeap

Reviewed-by: ayang

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp
! src/hotspot/share/gc/parallel/parallelScavengeHeap.hpp
! src/hotspot/share/gc/parallel/psScavenge.hpp
! src/hotspot/share/gc/parallel/vmStructs_parallelgc.hpp

Changeset: b83bf071
Branch: foreign-memaccess+abi
Author:    Qizheng Xing <qxing at openjdk.org>
Committer: Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-08 13:16:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b83bf0717eb8926efcf85a32be08f33a41bb48dd

8360192: C2: Make the type of count leading/trailing zero nodes more precise

Reviewed-by: qamai, epeter, jbhateja

! src/hotspot/share/opto/countbitsnode.cpp
+ test/hotspot/jtreg/compiler/c2/gvn/TestCountBitsRange.java
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/micro/org/openjdk/bench/vm/compiler/CountLeadingZeros.java

Changeset: 6700baa5
Branch: foreign-memaccess+abi
Author:    Hamlin Li <mli at openjdk.org>
Date:      2025-12-08 13:38:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6700baa5052046f53eb1b04ed3205bbd8e9e9070

8357551: RISC-V: support CMoveF/D vectorization

Reviewed-by: fyang, luhenry

! src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.cpp
! src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.hpp
! src/hotspot/cpu/riscv/macroAssembler_riscv.cpp
! src/hotspot/cpu/riscv/macroAssembler_riscv.hpp
! src/hotspot/cpu/riscv/riscv.ad
+ test/hotspot/jtreg/compiler/c2/irTests/TestConditionalMove.java
! test/hotspot/jtreg/compiler/c2/irTests/TestFPComparison2.java
+ test/hotspot/jtreg/compiler/c2/irTests/TestScalarConditionalMoveCmpObj.java
- test/hotspot/jtreg/compiler/c2/irTests/TestVectorConditionalMove.java
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
! test/micro/org/openjdk/bench/java/lang/ClassComparison.java
! test/micro/org/openjdk/bench/java/lang/FPComparison.java
! test/micro/org/openjdk/bench/java/lang/IntegerComparison.java
! test/micro/org/openjdk/bench/java/lang/LongComparison.java
! test/micro/org/openjdk/bench/java/lang/PointerComparison.java

Changeset: ed5fc9ad
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-08 14:21:40 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ed5fc9ad2defb75ea5a68fe6427a591376ce6d6b

8373087: Parallel: Rename PSGenerationPool to PSOldGenerationPool

Reviewed-by: tschatzl, jsikstro, iwalulya

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.hpp

Changeset: ac81ce51
Branch: foreign-memaccess+abi
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-08 15:38:35 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ac81ce51fa4ed04b6dbcc28cb2dd8eabcfe52ad7

8372555: Test com/sun/jdi/ExceptionEvents.java failed: ObjectCollectedException

Reviewed-by: amenkov, dholmes

! test/jdk/com/sun/jdi/ExceptionEvents.java

Changeset: 355755d3
Branch: foreign-memaccess+abi
Author:    Anton Artemov <aartemov at openjdk.org>
Date:      2025-12-08 16:07:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/355755d35de5c3155d1ea8d1afdd0debe5296a13

8366671: Refactor Thread::SpinAcquire and Thread::SpinRelease

Co-authored-by: Axel Boldt-Christmas <aboldtch at openjdk.org>
Reviewed-by: coleenp, kbarrett, dholmes, aboldtch

! src/hotspot/share/jfr/recorder/service/jfrEventThrottler.cpp
! src/hotspot/share/jfr/support/jfrAdaptiveSampler.cpp
! src/hotspot/share/jfr/support/jfrThreadLocal.cpp
- src/hotspot/share/jfr/utilities/jfrSpinlockHelper.hpp
! src/hotspot/share/runtime/objectMonitor.cpp
! src/hotspot/share/runtime/park.cpp
! src/hotspot/share/runtime/safepointVerifiers.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
+ src/hotspot/share/utilities/spinCriticalSection.cpp
+ src/hotspot/share/utilities/spinCriticalSection.hpp
! test/hotspot/gtest/jfr/test_adaptiveSampler.cpp

Changeset: 811591c5
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-08 16:11:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/811591c5c332e6427dc96819451e046841fe635b

8373262: Parallel: gc/metaspace/CompressedClassSpaceSizeInJmapHeap.java fails

Reviewed-by: cjplummer

! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/parallel/ParallelScavengeHeap.java

Changeset: d34ef196
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-08 18:51:34 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d34ef196c298aa91f8511714cfb04b15ae7fbf0a

8370198: Test gc/arguments/TestShrinkHeapInSteps.java crashed:  assert(left >= right) failed: avoid underflow

Reviewed-by: stefank, tschatzl

! src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
! src/hotspot/cpu/riscv/macroAssembler_riscv.cpp
! src/hotspot/share/gc/serial/serialHeap.cpp
! src/hotspot/share/gc/serial/serialHeap.hpp

Changeset: b118caf6
Branch: foreign-memaccess+abi
Author:    Alexandre Iline <shurailine at openjdk.org>
Date:      2025-12-08 22:16:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b118caf6777cbf5bf75b41156fdfaaa15479f924

8373285: Update JCov for class file version 71

Reviewed-by: erikj

! make/conf/jib-profiles.js

Changeset: 8df3f3d3
Branch: foreign-memaccess+abi
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-08 22:45:59 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8df3f3d3417bc8fdb5a75d986e084441bbf6ebd2

8373117: Update build doc link in README.md

Reviewed-by: ayang, tbell

! README.md

Changeset: b86b2cbc
Branch: foreign-memaccess+abi
Author:    Ben Taylor <btaylor at openjdk.org>
Committer: Y. Srinivas Ramakrishna <ysr at openjdk.org>
Date:      2025-12-09 00:17:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b86b2cbc7d9dd57aeaf64f70f248a120ae3cb751

8352914: Shenandoah: Change definition of ShenandoahSharedValue to int32_t to leverage platform atomics

Reviewed-by: wkemper, ysr

! src/hotspot/share/gc/shenandoah/shenandoahSharedVariables.hpp

Changeset: c03d445a
Branch: foreign-memaccess+abi
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-09 00:34:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c03d445a8ccfced5a59da680c37587f1024f3eca

6223700: XP L&F: Non-TopLevel JMenu's painting error

Reviewed-by: kizune, dnguyen

! src/java.desktop/windows/classes/com/sun/java/swing/plaf/windows/WindowsMenuUI.java
+ test/jdk/javax/swing/JMenu/TestPaintSpillOverBug.java

Changeset: b1c95501
Branch: foreign-memaccess+abi
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-09 01:00:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b1c955018281a228a67695e5077666d751cd87d2

8372554: Test windows-x64-cmp-baseline failed due to differences with splashscreen object file

Reviewed-by: dholmes

! make/modules/java.desktop/lib/ClientLibraries.gmk

Changeset: 3ea82b9f
Branch: foreign-memaccess+abi
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-09 01:16:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3ea82b9ff90aebc1a169fdd967c44408dc4a4f51

8373272: Genshen: ShenandoahOldGenerationTest fails after JDK-8373056

Reviewed-by: wkemper

! test/hotspot/gtest/gc/shenandoah/test_shenandoahOldGeneration.cpp

Changeset: c9ab330b
Branch: foreign-memaccess+abi
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-09 03:28:11 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c9ab330b7bdd3cc2410ffdb336a63aa0ac7256a3

8373116: Genshen: arraycopy_work should be always done for arrays in old gen during young concurrent marking
8372498: [genshen] gc/TestAllocHumongousFragment.java#generational causes intermittent SIGSEGV crashes

Reviewed-by: wkemper, kdnilsen

! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.hpp
! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.inline.hpp

Changeset: 35fe0b11
Branch: foreign-memaccess+abi
Author:    Harshit470250 <133243171+Harshit470250 at users.noreply.github.com>
Committer: Amit Kumar <amitkumar at openjdk.org>
Date:      2025-12-09 04:59:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/35fe0b11015bd3a88ee21c76b54f9d4969fdedf6

8372641: [s390x] Test failure TestMergeStores.java

Reviewed-by: mhaessig, amitkumar, lucy

! src/hotspot/cpu/s390/s390.ad

Changeset: 020e3f95
Branch: foreign-memaccess+abi
Author:    David Holmes <dholmes at openjdk.org>
Date:      2025-12-09 05:15:47 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/020e3f959194029715c18891e79aeed020abd59c

8373293: Change the exception handling in TestNestHostErrorWithMultiThread.java

Reviewed-by: jpai, iklam

! test/hotspot/jtreg/runtime/Nestmates/membership/TestNestHostErrorWithMultiThread.java

Changeset: cba09cd1
Branch: foreign-memaccess+abi
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-09 07:40:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/cba09cd10d4e4482852a317786242836419c313b

5107379: Component orientation in JOptionPane is not proper in Motif L&F.

Reviewed-by: tr, kizune

! src/java.desktop/share/classes/com/sun/java/swing/plaf/motif/MotifOptionPaneUI.java
+ test/jdk/javax/swing/plaf/motif/TestIconRTL.java

Changeset: 3a8a6e07
Branch: foreign-memaccess+abi
Author:    Ramkumar Sunderbabu <rsunderbabu at openjdk.org>
Committer: Ivan Walulya <iwalulya at openjdk.org>
Date:      2025-12-09 09:15:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3a8a6e07f2a2cffa467815df55e746e92765903d

8319326: GC: Make TestParallelRefProc use createTestJavaProcessBuilder

Reviewed-by: stefank, iwalulya

! test/hotspot/jtreg/gc/arguments/TestParallelRefProc.java

Changeset: 24244e41
Branch: foreign-memaccess+abi
Author:    Ramkumar Sunderbabu <rsunderbabu at openjdk.org>
Committer: Ivan Walulya <iwalulya at openjdk.org>
Date:      2025-12-09 09:17:38 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/24244e41210be5b71b9e8238badbf975ed4b02ef

8319161: GC: Make TestParallelGCThreads use createTestJavaProcessBuilder

Reviewed-by: stefank, iwalulya

! test/hotspot/jtreg/gc/arguments/TestParallelGCThreads.java

Changeset: 9c91c68d
Branch: foreign-memaccess+abi
Author:    Kevin Walls <kevinw at openjdk.org>
Date:      2025-12-09 09:18:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/9c91c68d1d5938d7e2b9a90c82b0a36ef1a063cd

8373111: Test java/lang/management/MemoryMXBean/MemoryManagement.java timed out

Reviewed-by: lmesnik

! test/jdk/java/lang/management/MemoryMXBean/MemoryManagement.java

Changeset: 786833cd
Branch: foreign-memaccess+abi
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-09 09:44:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/786833cd1bf8eda1cef25da392a055f4eb371abf

8373022: serviceability/sa/ClhsdbScanOops.java assumes no GC should occur

Reviewed-by: cjplummer, stefank, ayang, tschatzl

! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/serviceability/sa/ClhsdbScanOops.java

Changeset: 1f49edd9
Branch: foreign-memaccess+abi
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-09 10:02:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1f49edd9783ed4579d989d6939ee75e926f0716a

4459231: Focus of JTabbedPane(with Scrollable tablayout) changes on change in LookAndFeel

Reviewed-by: tr, kizune

! src/java.desktop/share/classes/javax/swing/plaf/basic/BasicTabbedPaneUI.java
+ test/jdk/javax/swing/JTabbedPane/TabbedPaneBugWithLNF.java

Changeset: 0a557890
Branch: foreign-memaccess+abi
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-09 10:04:25 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0a557890a50b0dc83c70dc877027d951dcc05470

8373025: test/hotspot/jtreg/gc/cslocker/TestCSLocker.java may deadlock

Reviewed-by: ayang, tschatzl, stefank

! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/gc/cslocker/TestCSLocker.java
! test/hotspot/jtreg/gc/cslocker/libTestCSLocker.c

Changeset: 830c4d3b
Branch: foreign-memaccess+abi
Author:    Anton Artemov <aartemov at openjdk.org>
Date:      2025-12-09 10:15:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/830c4d3b198597b6af7a21b708bd3a852af200d4

8366272: The os::xxx APIs do not manage errno correctly

Reviewed-by: dholmes

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/posix/os_posix.cpp
! src/hotspot/os/posix/signals_posix.cpp
! src/hotspot/os/windows/os_windows.cpp

Changeset: a4eb57c5
Branch: foreign-memaccess+abi
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-09 12:45:36 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a4eb57c5ec6254e59e486042015dd00457284ef2

8367028: compiler/c2/irTests/TestFloat16ScalarOperations.java failing intermittently because of constant folding

Reviewed-by: chagedorn, syan, rcastanedalo

! test/hotspot/jtreg/compiler/c2/irTests/TestFloat16ScalarOperations.java

Changeset: 8c8d21db
Branch: foreign-memaccess+abi
Author:    Ioi Lam <iklam at openjdk.org>
Date:      2025-12-09 16:10:13 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8c8d21db6f5bdc35f6eddf91065b4eec462a716f

8373295: Wrong log tag for UseCompressedOops ergo setting

Reviewed-by: dholmes, ysuenaga

! src/hotspot/share/runtime/arguments.cpp
- test/hotspot/jtreg/runtime/cds/appcds/sharedStrings/SysDictCrash.java

Changeset: 831fe94c
Branch: foreign-memaccess+abi
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-09 17:01:08 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/831fe94c75c407b2399be9b89630d8d117c2996c

8373255: Unexpected iobj and ipdb files after JDK-8370438

Reviewed-by: serb

! make/common/native/Flags.gmk

Changeset: b99be505
Branch: foreign-memaccess+abi
Author:    Neha Joshi <neha.j.joshi at oracle.com>
Committer: Rajan Halade <rhalade at openjdk.org>
Date:      2025-12-09 18:06:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b99be505a5e3c8304be62a8b373d746fc52e8f0e

8368524: Tests are skipped and shown as passed in test/jdk/sun/security/pkcs11/Cipher/KeyWrap

Reviewed-by: myankelevich, rhalade

! test/jdk/sun/security/pkcs11/Cipher/KeyWrap/NISTWrapKAT.java
! test/jdk/sun/security/pkcs11/Cipher/KeyWrap/TestGeneral.java

Changeset: b2daf9de
Branch: foreign-memaccess+abi
Author:    Naoto Sato <naoto at openjdk.org>
Date:      2025-12-09 18:21:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b2daf9de3097de4d3b3c7d565e29a48b4aae19ee

8355522: Remove the `java.locale.useOldISOCodes` system property

Reviewed-by: jlu, joehw

! src/java.base/share/classes/java/util/Locale.java
! src/java.base/share/classes/jdk/internal/util/StaticProperty.java
! src/java.base/share/classes/sun/util/locale/BaseLocale.java
! src/java.base/share/classes/sun/util/locale/provider/LocaleResources.java
! test/jdk/java/util/Locale/LocaleTest.java
! test/jdk/java/util/Locale/UseOldISOCodesTest.java

Changeset: 1ae4a6c4
Branch: foreign-memaccess+abi
Author:    Matthew Donovan <mdonovan at openjdk.org>
Date:      2025-12-09 18:48:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1ae4a6c43ea21d4b147bcfcfaf1484c6e618dce5

8373101: JdkClient and JdkServer test classes ignore namedGroups field

Reviewed-by: rhalade

! test/jdk/javax/net/ssl/TLSCommon/interop/JdkClient.java
! test/jdk/javax/net/ssl/TLSCommon/interop/JdkServer.java

Changeset: 7f9951a9
Branch: foreign-memaccess+abi
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-12-10 00:07:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7f9951a93479ac0ddd74375fdef92095fb65741b

8373207: Make DeferredStatic class template constant initializable

Reviewed-by: jsjolen, stefank, iwalulya

! src/hotspot/share/utilities/deferredStatic.hpp

Changeset: eef9813a
Branch: foreign-memaccess+abi
Author:    Xueming Shen <sherman at openjdk.org>
Date:      2025-12-10 00:50:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/eef9813ad42b02db5fc636e661a751d5120a639e

8371446: VectorAPI: Add unit tests for masks from various long values

Reviewed-by: psandoz

! test/jdk/jdk/incubator/vector/AbstractVectorTest.java
! test/jdk/jdk/incubator/vector/Byte128VectorTests.java
! test/jdk/jdk/incubator/vector/Byte256VectorTests.java
! test/jdk/jdk/incubator/vector/Byte512VectorTests.java
! test/jdk/jdk/incubator/vector/Byte64VectorTests.java
! test/jdk/jdk/incubator/vector/ByteMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Double128VectorTests.java
! test/jdk/jdk/incubator/vector/Double256VectorTests.java
! test/jdk/jdk/incubator/vector/Double512VectorTests.java
! test/jdk/jdk/incubator/vector/Double64VectorTests.java
! test/jdk/jdk/incubator/vector/DoubleMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Float128VectorTests.java
! test/jdk/jdk/incubator/vector/Float256VectorTests.java
! test/jdk/jdk/incubator/vector/Float512VectorTests.java
! test/jdk/jdk/incubator/vector/Float64VectorTests.java
! test/jdk/jdk/incubator/vector/FloatMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Int128VectorTests.java
! test/jdk/jdk/incubator/vector/Int256VectorTests.java
! test/jdk/jdk/incubator/vector/Int512VectorTests.java
! test/jdk/jdk/incubator/vector/Int64VectorTests.java
! test/jdk/jdk/incubator/vector/IntMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Long128VectorTests.java
! test/jdk/jdk/incubator/vector/Long256VectorTests.java
! test/jdk/jdk/incubator/vector/Long512VectorTests.java
! test/jdk/jdk/incubator/vector/Long64VectorTests.java
! test/jdk/jdk/incubator/vector/LongMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Short128VectorTests.java
! test/jdk/jdk/incubator/vector/Short256VectorTests.java
! test/jdk/jdk/incubator/vector/Short512VectorTests.java
! test/jdk/jdk/incubator/vector/Short64VectorTests.java
! test/jdk/jdk/incubator/vector/ShortMaxVectorTests.java
! test/jdk/jdk/incubator/vector/gen-template.sh
+ test/jdk/jdk/incubator/vector/templates/Kernel-BoolBinary-op.template
+ test/jdk/jdk/incubator/vector/templates/Kernel-BoolUnary-op.template
+ test/jdk/jdk/incubator/vector/templates/Unit-BoolBinary-op.template
+ test/jdk/jdk/incubator/vector/templates/Unit-BoolUnary-op.template
+ test/jdk/jdk/incubator/vector/templates/Unit-Mask-FromToLong.template
! test/jdk/jdk/incubator/vector/templates/Unit-Miscellaneous.template
! test/jdk/jdk/incubator/vector/templates/Unit-header.template

Changeset: a2622129
Branch: foreign-memaccess+abi
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-10 02:04:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a26221299e657b64379d2d56ed3b073f12b227d1

8255463: java/nio/channels/spi/SelectorProvider/inheritedChannel/InheritedChannelTest.java failed with ThreadTimeoutException

Reviewed-by: dfuchs, djelinski, bpb

! test/jdk/java/nio/channels/spi/SelectorProvider/inheritedChannel/InheritedChannelTest.java

Changeset: b6732d60
Branch: foreign-memaccess+abi
Author:    Xiaohong Gong <xgong at openjdk.org>
Date:      2025-12-10 02:09:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b6732d6048259de68a3dd5b4f66ac82f87270404

8371603: C2: Missing Ideal optimizations for load and store vectors on SVE

Co-authored-by: Emanuel Peter <epeter at openjdk.org>
Reviewed-by: epeter, erfang, haosun

! src/hotspot/cpu/aarch64/aarch64_vector.ad
! src/hotspot/cpu/aarch64/aarch64_vector_ad.m4
! src/hotspot/share/opto/matcher.hpp
! src/hotspot/share/opto/vectornode.cpp
! src/hotspot/share/opto/vectornode.hpp
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorLoadStoreOptimization.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorOperationsWithPartialSize.java

Changeset: d36a234c
Branch: foreign-memaccess+abi
Author:    Ioi Lam <iklam at openjdk.org>
Date:      2025-12-10 02:26:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d36a234c1228fdb12eb5931506ba1e03ebae95fc

8368701: CDS VerifierTest_1A.java failed on machines with 512 GB RAM

Reviewed-by: dholmes, lmesnik

! test/hotspot/jtreg/runtime/cds/appcds/VerifierTest.java

Changeset: a5968f93
Branch: foreign-memaccess+abi
Author:    Anjian Wen <wenanjian at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
Date:      2025-12-10 02:34:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a5968f936462741a7edea5bbbe73cb067af3d34f

8371968: RISC-V: implement AES CBC intrinsics

Reviewed-by: fyang, fjiang

! src/hotspot/cpu/riscv/stubGenerator_riscv.cpp

Changeset: 1bbbce75
Branch: foreign-memaccess+abi
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-10 04:31:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1bbbce75c5e68429c2a32519eb3c36d964dcdf57

6726690: SwingUtilities.replaceUI*Map() methods do not remove previously installed maps

Reviewed-by: azvegint, tr

! src/java.desktop/share/classes/javax/swing/SwingUtilities.java
+ test/jdk/javax/swing/SwingUtilities/UIMapTest.java

Changeset: 00068a80
Branch: foreign-memaccess+abi
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-12-10 08:45:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/00068a80304a809297d0df8698850861e9a1c5e9

8354282: C2: more crashes in compiled code because of dependency on removed range check CastIIs

Reviewed-by: chagedorn, qamai, galder, epeter

! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp
! src/hotspot/share/opto/castnode.cpp
! src/hotspot/share/opto/castnode.hpp
! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/escape.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/loopTransform.cpp
! src/hotspot/share/opto/loopnode.cpp
! src/hotspot/share/opto/loopopts.cpp
! src/hotspot/share/opto/macroArrayCopy.cpp
! test/hotspot/jtreg/compiler/c2/irTests/TestPushAddThruCast.java
! test/hotspot/jtreg/compiler/rangechecks/TestArrayAccessAboveRCAfterRCCastIIEliminated.java

Changeset: b60ac710
Branch: foreign-memaccess+abi
Author:    Anton Seoane Ampudia <aseoane at openjdk.org>
Committer: Christian Hagedorn <chagedorn at openjdk.org>
Date:      2025-12-10 08:53:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b60ac710bebf195972436da324983e61b51484ef

8364490: Fatal error on large SpecTrapLimitExtraEntries value

Reviewed-by: chagedorn, roland

! src/hotspot/share/runtime/globals.hpp
+ test/hotspot/jtreg/compiler/arguments/TestSpecTrapLimitExtraEntries.java

Changeset: 8eaeb699
Branch: foreign-memaccess+abi
Author:    David Briemann <dbriemann at openjdk.org>
Date:      2025-12-10 10:21:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8eaeb6990b85ac8717f4fc4ce883f674017b91f3

8372589: VM crashes on init when NonNMethodCodeHeapSize is set too small and UseTransparentHugePages is enabled

Reviewed-by: mdoerr, chagedorn

! src/hotspot/share/code/codeCache.cpp

Changeset: b58e3b60
Branch: foreign-memaccess+abi
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-10 12:08:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b58e3b600bb14bf7133eda0c37a4be4c82919d79

8373227: Test java/net/httpclient/http2/StreamFlowControlTest.java failed: should sleep time be raised?

Reviewed-by: djelinski

! test/jdk/java/net/httpclient/http2/StreamFlowControlTest.java

Changeset: 655e9cda
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-10 13:08:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/655e9cda3f6b1fa3a6f0553e7745aa088dde53e8

8373335: Serial: Clean up SerialHeap members by access specifies

Reviewed-by: jsikstro

! src/hotspot/share/gc/serial/serialHeap.cpp
! src/hotspot/share/gc/serial/serialHeap.hpp

Changeset: 54430a87
Branch: foreign-memaccess+abi
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-10 15:14:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/54430a87226096725b13f05326d08629420657ca

8373362: Http3TestServer should not log an exception stack trace when it is stopping normally

Reviewed-by: jpai, djelinski

! test/jdk/java/net/httpclient/lib/jdk/httpclient/test/lib/http3/Http3ServerExchange.java
! test/jdk/java/net/httpclient/lib/jdk/httpclient/test/lib/http3/Http3TestServer.java

Changeset: 11aa6e10
Branch: foreign-memaccess+abi
Author:    Fairoz Matte <fmatte at openjdk.org>
Date:      2025-12-10 18:15:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/11aa6e10c017a7257c60eb7395d728d32b2006d4

8373270: GCC 14.2.0 reports warning: '%s' directive output may be truncated

Reviewed-by: kbarrett, dholmes, alanb

! src/java.base/unix/native/libjli/java_md_common.c

Changeset: 413f852b
Branch: foreign-memaccess+abi
Author:    Mat Carter <macarte at openjdk.org>
Committer: Ioi Lam <iklam at openjdk.org>
Date:      2025-12-10 18:49:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/413f852bdb4767b2a1c29431144616668888138d

8369736: Add management interface for AOT cache creation

Reviewed-by: mr, iklam, kevinw

! src/hotspot/share/cds/aotMetaspace.cpp
! src/hotspot/share/include/jvm.h
! src/hotspot/share/prims/jvm.cpp
! src/java.management/share/classes/sun/management/VMManagement.java
! src/java.management/share/classes/sun/management/VMManagementImpl.java
! src/java.management/share/native/libmanagement/VMManagementImpl.c
+ src/jdk.management/share/classes/com/sun/management/internal/HotSpotAOTCacheImpl.java
! src/jdk.management/share/classes/com/sun/management/internal/PlatformMBeanProviderImpl.java
+ src/jdk.management/share/classes/jdk/management/HotSpotAOTCacheMXBean.java
+ test/hotspot/jtreg/runtime/cds/appcds/aotCache/HotSpotAOTCacheMXBeanTest.java

Changeset: 52aa7fe1
Branch: foreign-memaccess+abi
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-10 21:40:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/52aa7fe1c970709fe387b70a5020ea0e77c4047f

8334549: [Sound] Test timed out: javax/sound/sampled/Clip/OpenNonIntegralNumberOfSampleframes.java

Reviewed-by: aivanov, kizune

! test/jdk/javax/sound/sampled/Clip/OpenNonIntegralNumberOfSampleframes.java

Changeset: 74dca863
Branch: foreign-memaccess+abi
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-10 22:46:35 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/74dca863c2e61c13884c3454b8da7be125235970

8371718: (sc) Channels.new{Input,Output}Stream can allocate unbounded memory for a socket channel

Reviewed-by: alanb

! src/java.base/share/classes/sun/nio/ch/ChannelInputStream.java
! src/java.base/share/classes/sun/nio/ch/ChannelOutputStream.java
! src/java.base/share/classes/sun/nio/ch/NioSocketImpl.java
! src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java
! src/java.base/share/classes/sun/nio/ch/Streams.java
! test/jdk/java/nio/channels/Channels/SocketChannelStreams.java

Changeset: 920a99fa
Branch: foreign-memaccess+abi
Author:    Kevin Walls <kevinw at openjdk.org>
Date:      2025-12-11 07:44:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/920a99faeb6e0aee445df39cf8ddd43df18345d6

8370731: Tests in vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/ failed: OutOfMemoryError

Reviewed-by: sspitsyn

! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters001/CollectionCounters001.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters002/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters003/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters004/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters005/TestDescription.java

Changeset: b46aef88
Branch: foreign-memaccess+abi
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-11 08:17:25 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b46aef88b333db8866c60c18cbf842b6cb89dacf

8371871: libSharedCloseAgent.cpp crashes VS2019 and older VS2022 compiler

Reviewed-by: jvernee, mdoerr

! test/jdk/java/foreign/sharedclosejvmti/libSharedCloseAgent.cpp

Changeset: 4b774cb4
Branch: foreign-memaccess+abi
Author:    Saranya Natarajan <snatarajan at openjdk.org>
Date:      2025-12-11 08:43:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/4b774cb46d9355015a6bfcf53b47233d6f235239

8370489: Some compiler tests miss the @key randomness

Reviewed-by: dfenacci, epeter, chagedorn

! test/hotspot/jtreg/compiler/c2/TestMergeStores.java
! test/hotspot/jtreg/compiler/c2/TestMergeStoresMemorySegment.java
! test/hotspot/jtreg/compiler/c2/TestMinMaxSubword.java
! test/hotspot/jtreg/compiler/c2/aarch64/TestFloat16Replicate.java
! test/hotspot/jtreg/compiler/c2/irTests/ModDNodeTests.java
! test/hotspot/jtreg/compiler/c2/irTests/ModFNodeTests.java
! test/hotspot/jtreg/compiler/c2/irTests/ModINodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/ModLNodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/TestMulNodeIdealization.java
! test/hotspot/jtreg/compiler/c2/irTests/TestShiftAndMask.java
! test/hotspot/jtreg/compiler/c2/irTests/UDivINodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/UDivLNodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/UModINodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/UModLNodeIdealizationTests.java
! test/hotspot/jtreg/compiler/controldependency/TestDivDependentOnMainLoopGuard.java
! test/hotspot/jtreg/compiler/igvn/ExpressionFuzzer.java
! test/hotspot/jtreg/compiler/intrinsics/float16/TestFloat16MaxMinSpecialValues.java
! test/hotspot/jtreg/compiler/loopopts/InvariantCodeMotionReassociateAddSub.java
! test/hotspot/jtreg/compiler/loopopts/InvariantCodeMotionReassociateCmp.java
! test/hotspot/jtreg/compiler/loopopts/parallel_iv/TestParallelIvInIntCountedLoop.java
! test/hotspot/jtreg/compiler/loopopts/superword/MinMaxRed_Int.java
! test/hotspot/jtreg/compiler/loopopts/superword/ReductionPerf.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestAliasing.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestAlignVector.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestCompatibleUseDefTypeSize.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestDependencyOffsets.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestEquivalentInvariants.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestMemorySegment.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestMemorySegmentUnalignedAddress.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestSplitPacks.java
! test/hotspot/jtreg/compiler/vectorapi/Test8278948.java
! test/hotspot/jtreg/compiler/vectorapi/TestVectorAddMulReduction.java
! test/hotspot/jtreg/compiler/vectorapi/TestVectorCompressExpandBits.java
! test/hotspot/jtreg/compiler/vectorapi/VectorMaskCastIdentityTest.java
! test/hotspot/jtreg/compiler/vectorapi/VectorMultiplyOpt.java
! test/hotspot/jtreg/compiler/vectorapi/VectorSaturatedOperationsTest.java
! test/hotspot/jtreg/compiler/vectorization/TestAutoVecIntMinMax.java
! test/hotspot/jtreg/compiler/vectorization/TestEor3AArch64.java
! test/hotspot/jtreg/compiler/vectorization/TestMacroLogicVector.java
! test/hotspot/jtreg/compiler/vectorization/TestVectorZeroCount.java

Changeset: 6a6ff876
Branch: foreign-memaccess+abi
Author:    Roman Marchenko <rmarchenko at openjdk.org>
Committer: Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-11 08:48:26 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6a6ff876c515eba6cc89320e02dc5739d4540316

8372860: TestCodeCacheUnloadDuringConcCycle fails on ARM32

Reviewed-by: tschatzl, shade

! test/hotspot/jtreg/gc/g1/TestCodeCacheUnloadDuringConcCycle.java

Changeset: aa986be7
Branch: foreign-memaccess+abi
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-11 10:56:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/aa986be7529b7a2950202dbe6885e5224d331078

8373421: Parallel: Rename young generation eden and survivor space pool

Reviewed-by: tschatzl, jsikstro

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.hpp

Changeset: e1d1d53c
Branch: foreign-memaccess+abi
Author:    Daniel Gredler <dgredler at openjdk.org>
Date:      2025-12-11 13:53:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e1d1d53cd1211b64d1fef03583a23056908b3482

8167268: StandardGlyphVector.getGlyphMetrics creates metrics with erroneous bounds for characters with no outline (e.g., the space character ' ')

Reviewed-by: serb, prr

! src/java.desktop/share/classes/sun/font/StandardGlyphVector.java
+ test/jdk/java/awt/font/GlyphVector/GlyphMetricsTest.java

Changeset: b0bd0c39
Branch: foreign-memaccess+abi
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-11 14:13:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b0bd0c398ee0e0fd625eba1e7d9802a4e420a2c5

8372759: Test build/AbsPathsInImage.java fails after JDK-8370438

Reviewed-by: erikj

! make/autoconf/flags-ldflags.m4

Changeset: 2a1c676e
Branch: foreign-memaccess+abi
Author:    Ioi Lam <iklam at openjdk.org>
Date:      2025-12-11 14:33:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2a1c676e0a1a357f75ea008e8e12c7ae9340b9b1

8373464: Test JdkManagementCheckSince.java fails after JDK-8369736

Reviewed-by: dholmes, shade, kevinw

! src/jdk.management/share/classes/jdk/management/HotSpotAOTCacheMXBean.java

Changeset: 692edc48
Branch: foreign-memaccess+abi
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-11 15:30:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/692edc4879489d44a477a03028eb3e7ef9dff388

8373443: Update --release 26 symbol information for JDK 26 build 27

Reviewed-by: jlahoda, iris, darcy

! src/jdk.compiler/share/data/symbols/java.base-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.sql-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.incubator.foreign-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.jpackage-Q.sym.txt
! src/jdk.compiler/share/data/symbols/symbols

Changeset: 431dcf84
Branch: foreign-memaccess+abi
Author:    Daniel Gredler <dgredler at openjdk.org>
Date:      2025-12-11 20:15:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/431dcf84e9754c743105380ca69af647b57193bc

8368702: [macosx] Printing text with composite fonts loses font transform

Reviewed-by: psadhukhan, prr

! src/java.desktop/macosx/classes/sun/lwawt/macosx/CTextPipe.java
! test/jdk/java/awt/print/PrinterJob/PrintTextTest.java

Changeset: 66d7b0ce
Branch: foreign-memaccess+abi
Author:    Sergey Bylokhov <serb at openjdk.org>
Date:      2025-12-11 20:32:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/66d7b0ce8f8414c3d5fd3476b65152b9f2a9a587

8371657: [macosx] Programmatically selecting/deselecting List item triggers an ItemEvent

Reviewed-by: aivanov, azvegint, dnguyen, tr

! src/java.desktop/macosx/classes/sun/lwawt/LWListPeer.java
! test/jdk/ProblemList.txt
+ test/jdk/java/awt/List/NoEvents/ProgrammaticChange.java

Changeset: ae85d899
Branch: foreign-memaccess+abi
Author:    Xueming Shen <sherman at openjdk.org>
Date:      2025-12-11 20:47:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ae85d899d074c531371dece30319ace701517528

8373389: Two jdk/incubator/vector/ tests fails after JDK-8371446

Reviewed-by: psandoz

! test/jdk/jdk/incubator/vector/AbstractVectorTest.java
! test/jdk/jdk/incubator/vector/Byte128VectorTests.java
! test/jdk/jdk/incubator/vector/Byte256VectorTests.java
! test/jdk/jdk/incubator/vector/Byte512VectorTests.java
! test/jdk/jdk/incubator/vector/Byte64VectorTests.java
! test/jdk/jdk/incubator/vector/ByteMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Double128VectorTests.java
! test/jdk/jdk/incubator/vector/Double256VectorTests.java
! test/jdk/jdk/incubator/vector/Double512VectorTests.java
! test/jdk/jdk/incubator/vector/Double64VectorTests.java
! test/jdk/jdk/incubator/vector/DoubleMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Float128VectorTests.java
! test/jdk/jdk/incubator/vector/Float256VectorTests.java
! test/jdk/jdk/incubator/vector/Float512VectorTests.java
! test/jdk/jdk/incubator/vector/Float64VectorTests.java
! test/jdk/jdk/incubator/vector/FloatMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Int128VectorTests.java
! test/jdk/jdk/incubator/vector/Int256VectorTests.java
! test/jdk/jdk/incubator/vector/Int512VectorTests.java
! test/jdk/jdk/incubator/vector/Int64VectorTests.java
! test/jdk/jdk/incubator/vector/IntMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Long128VectorTests.java
! test/jdk/jdk/incubator/vector/Long256VectorTests.java
! test/jdk/jdk/incubator/vector/Long512VectorTests.java
! test/jdk/jdk/incubator/vector/Long64VectorTests.java
! test/jdk/jdk/incubator/vector/LongMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Short128VectorTests.java
! test/jdk/jdk/incubator/vector/Short256VectorTests.java
! test/jdk/jdk/incubator/vector/Short512VectorTests.java
! test/jdk/jdk/incubator/vector/Short64VectorTests.java
! test/jdk/jdk/incubator/vector/ShortMaxVectorTests.java

Changeset: c46bed72
Branch: foreign-memaccess+abi
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
Date:      2025-12-12 04:03:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c46bed7292aad21b8cf9defcccac43c010a1f116

8371502: serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java failing

Reviewed-by: lmesnik, amenkov

! test/hotspot/jtreg/serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java

Changeset: 325cdb7f
Branch: foreign-memaccess+abi
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-12 05:46:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/325cdb7fc5cd2ce1d2c2bf08ca064fb0f7e5a0b8

8373517: Revert the macos Tahoe specific change done in JDK-8359830

Reviewed-by: rriggs, bpb

! src/java.base/macosx/native/libjava/java_props_macosx.c

Changeset: 650de99f
Branch: foreign-memaccess+abi
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-12 07:17:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/650de99fc662a3e8473391627df9e523b6b80727

8367158: C2: create better fill and copy benchmarks, taking alignment into account

Reviewed-by: qamai, kvn

+ test/micro/org/openjdk/bench/vm/compiler/VectorBulkOperationsArray.java
+ test/micro/org/openjdk/bench/vm/compiler/VectorBulkOperationsMemorySegment.java

Changeset: dc625526
Branch: foreign-memaccess+abi
Author:    Hamlin Li <mli at openjdk.org>
Date:      2025-12-12 09:59:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/dc6255261f34c65d0e87814638817c97a880eb7f

8371920: [TEST] Enable CMove tests on other platforms

Reviewed-by: fyang, epeter

= test/hotspot/jtreg/compiler/c2/cmove/TestConditionalMove.java
= test/hotspot/jtreg/compiler/c2/cmove/TestFPComparison2.java
= test/hotspot/jtreg/compiler/c2/cmove/TestScalarConditionalMoveCmpObj.java

Changeset: f6fb82c1
Branch: foreign-memaccess+abi
Author:    duke <duke at openjdk.org>
Date:      2025-12-12 11:01:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f6fb82c1835ba8cc6e8e17b2c6da16411a3dd251

Automatic merge of jdk:master into master


Changeset: ce860932
Branch: foreign-memaccess+abi
Author:    duke <duke at openjdk.org>
Date:      2025-12-12 11:01:56 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ce86093200dcd898fb258231da4d32c8b9951844

Automatic merge of master into foreign-memaccess+abi

! README.md
! README.md


From duke at openjdk.org  Fri Dec 12 11:14:51 2025
From: duke at openjdk.org (duke)
Date: Fri, 12 Dec 2025 11:14:51 GMT
Subject: git: openjdk/panama-foreign: master: 78 new changesets
Message-ID: <d0a3ef8a-b5bd-4ce1-9c7a-51852812be30@openjdk.org>

Changeset: c09167df
Branch: master
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-05 14:01:36 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c09167df60f44642492ec20f133713388f4802ad

8373113: Fix whitespace in RunTests.gmk

Reviewed-by: tbell

! make/RunTests.gmk

Changeset: ee0b8a72
Branch: master
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-05 15:39:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ee0b8a72c64f7ac5058dbe5b2062cb35b6195484

8373102: com/sun/jdi/MethodInvokeWithTraceOnTest.java can fail with ObjectCollectedException when run with a small heap

Reviewed-by: amenkov, sspitsyn

! src/jdk.jdi/share/classes/com/sun/tools/jdi/EventSetImpl.java
! test/jdk/ProblemList.txt

Changeset: 4d696d0d
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-05 15:46:07 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/4d696d0d0ed523e3c99c68214586673913b1c7b5

8373086: Make isexceeded001.java more robust

Reviewed-by: jsikstro, tschatzl

! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/MemoryPoolMBean/isUsageThresholdExceeded/isexceeded001.java

Changeset: 520c092a
Branch: master
Author:    Neha Joshi <neha.j.joshi at oracle.com>
Committer: Rajan Halade <rhalade at openjdk.org>
Date:      2025-12-05 16:46:26 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/520c092a658559a5d65f06a51061db3aae09931e

8362658: sun/security/ssl/SSLEngineImpl/* tests duplicate jvm flags

Co-authored-by: Lei Zhu <korov9.c at gmail.com>
Reviewed-by: myankelevich, rhalade

! test/jdk/ProblemList-jvmti-stress-agent.txt
! test/jdk/sun/security/ssl/SSLEngineImpl/SSLEngineKeyLimit.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTClient.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTNoSessionCreation.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTParallel.java
! test/jdk/sun/security/ssl/SSLSessionImpl/MultiNSTSequence.java
! test/jdk/sun/security/ssl/SSLSessionImpl/ResumptionUpdateBoundValues.java
! test/jdk/sun/security/ssl/SSLSocketImpl/SSLSocketKeyLimit.java

Changeset: a20b7eb9
Branch: master
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2025-12-05 17:35:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a20b7eb943c19f9852bfaaec1fbbff647f1f5273

8373125: Add defensive screening of modifiers for Field and Parameter toString() results

Reviewed-by: alanb, liach

! src/java.base/share/classes/java/lang/reflect/Field.java
! src/java.base/share/classes/java/lang/reflect/Parameter.java
! test/jdk/java/lang/reflect/Modifier/toStringTest.java

Changeset: 43787890
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-05 19:17:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/43787890291d71de61b28b8a4e3bf9aaba46757a

8373145: [BACKOUT] Remove ThreadLocalAllocBuffer::_reserve_for_allocation_prefetch

Reviewed-by: mdoerr, kvn

! src/hotspot/cpu/ppc/ppc.ad
! src/hotspot/share/gc/shared/threadLocalAllocBuffer.cpp
! src/hotspot/share/gc/shared/threadLocalAllocBuffer.hpp
! src/hotspot/share/opto/macro.cpp
! src/hotspot/share/runtime/vmStructs.cpp
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/ThreadLocalAllocBuffer.java
! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/VM.java

Changeset: f3dd8daa
Branch: master
Author:    Brent Christian <bchristi at openjdk.org>
Date:      2025-12-05 19:30:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f3dd8daaa92896be51254e5abf3e0ec5b1ff5173

8371748: Remove the (empty) ThreadPoolExecutor.finalize() method

Reviewed-by: vklang, jpai, alanb

! src/java.base/share/classes/java/util/concurrent/ThreadPoolExecutor.java

Changeset: be8cbfa6
Branch: master
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-05 20:37:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/be8cbfa6129d19403c9871c22721b902856f1886

8362083: JDI VirtualMachine/dispose/dispose001 failed with FATAL ERROR in native method: JDWP cannot set thread local storage, jvmtiError=JVMTI_ERROR_WRONG_PHASE(112)

Reviewed-by: lmesnik, sspitsyn, amenkov

! src/jdk.jdwp.agent/share/native/libjdwp/threadControl.c

Changeset: 2596608b
Branch: master
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-05 21:20:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2596608ba1bb1b271dfa062bf732a5095e22fffd

8370846: Support execution of mlvm testing with test thread factory

Reviewed-by: cjplummer

! test/hotspot/jtreg/vmTestbase/vm/mlvm/share/jdi/JDIBreakpointTest.java
! test/lib/jdk/test/lib/thread/TestThreadFactory.java

Changeset: b0f59f60
Branch: master
Author:    Leonid Mesnik <lmesnik at openjdk.org>
Date:      2025-12-06 00:02:51 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b0f59f6021a00dc569e08810b34db21553a5b68d

8373127: Update nsk/monitoring tests to support virtual thread factory testing

Reviewed-by: kevinw, amenkov

! test/hotspot/jtreg/vmTestbase/nsk/monitoring/MemoryUsage/from/from001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/from_c/from_c001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/getLockName/getlockname001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/getLockOwnerName/getlockownername001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadInfo/isInNative/isinnative001/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadMXBean/GetThreadAllocatedBytes/BaseBehaviorTest.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/ThreadMXBean/GetThreadCpuTime/BaseBehaviorTest.java

Changeset: 5f083aba
Branch: master
Author:    Patrick Strawderman <pstrawderman at netflix.com>
Committer: Viktor Klang <vklang at openjdk.org>
Date:      2025-12-06 15:34:14 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/5f083abafc7abfaa46ddd053668cdfbfd2ad8a87

8179918: EnumSet spliterator should report SORTED, ORDERED, NONNULL

Reviewed-by: vklang

! src/java.base/share/classes/java/util/EnumSet.java
+ test/jdk/java/util/EnumSet/EnumSetSpliteratorTest.java

Changeset: 7da91533
Branch: master
Author:    Sergey Chernyshev <schernyshev at openjdk.org>
Committer: Volkan Yazici <vyazici at openjdk.org>
Date:      2025-12-08 09:06:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7da91533aaf2033cedee6e2a56fb693f26909df5

8369950: TLS connection to IPv6 address fails with BCJSSE due to IllegalArgumentException

Co-authored-by: Mikhail Yankelevich <myankelevich at openjdk.org>
Reviewed-by: djelinski, vyazici, dfuchs, myankelevich

! src/java.base/share/classes/sun/net/www/protocol/https/HttpsClient.java
+ test/jdk/javax/net/ssl/HttpsURLConnection/SubjectAltNameIP.java

Changeset: 35001508
Branch: master
Author:    Jan Lahoda <jlahoda at openjdk.org>
Date:      2025-12-08 10:04:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/350015088281eb9e6e9e3a9811f38adac5f7a975

8373094: javac may fail because of unattributed break in a loop

Reviewed-by: vromero

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
! test/langtools/tools/javac/recovery/AttrRecovery.java

Changeset: a6594794
Branch: master
Author:    Francesco Andreuzzi <fandreuzzi at openjdk.org>
Date:      2025-12-08 11:45:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a6594794839807d56434d6f28fe3d581fb1e36c0

8367541: Parallel: Make young and old generation fields nonstatic in ParallelScavengeHeap

Reviewed-by: ayang

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp
! src/hotspot/share/gc/parallel/parallelScavengeHeap.hpp
! src/hotspot/share/gc/parallel/psScavenge.hpp
! src/hotspot/share/gc/parallel/vmStructs_parallelgc.hpp

Changeset: b83bf071
Branch: master
Author:    Qizheng Xing <qxing at openjdk.org>
Committer: Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-08 13:16:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b83bf0717eb8926efcf85a32be08f33a41bb48dd

8360192: C2: Make the type of count leading/trailing zero nodes more precise

Reviewed-by: qamai, epeter, jbhateja

! src/hotspot/share/opto/countbitsnode.cpp
+ test/hotspot/jtreg/compiler/c2/gvn/TestCountBitsRange.java
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/micro/org/openjdk/bench/vm/compiler/CountLeadingZeros.java

Changeset: 6700baa5
Branch: master
Author:    Hamlin Li <mli at openjdk.org>
Date:      2025-12-08 13:38:22 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6700baa5052046f53eb1b04ed3205bbd8e9e9070

8357551: RISC-V: support CMoveF/D vectorization

Reviewed-by: fyang, luhenry

! src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.cpp
! src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.hpp
! src/hotspot/cpu/riscv/macroAssembler_riscv.cpp
! src/hotspot/cpu/riscv/macroAssembler_riscv.hpp
! src/hotspot/cpu/riscv/riscv.ad
+ test/hotspot/jtreg/compiler/c2/irTests/TestConditionalMove.java
! test/hotspot/jtreg/compiler/c2/irTests/TestFPComparison2.java
+ test/hotspot/jtreg/compiler/c2/irTests/TestScalarConditionalMoveCmpObj.java
- test/hotspot/jtreg/compiler/c2/irTests/TestVectorConditionalMove.java
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
! test/micro/org/openjdk/bench/java/lang/ClassComparison.java
! test/micro/org/openjdk/bench/java/lang/FPComparison.java
! test/micro/org/openjdk/bench/java/lang/IntegerComparison.java
! test/micro/org/openjdk/bench/java/lang/LongComparison.java
! test/micro/org/openjdk/bench/java/lang/PointerComparison.java

Changeset: ed5fc9ad
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-08 14:21:40 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ed5fc9ad2defb75ea5a68fe6427a591376ce6d6b

8373087: Parallel: Rename PSGenerationPool to PSOldGenerationPool

Reviewed-by: tschatzl, jsikstro, iwalulya

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.hpp

Changeset: ac81ce51
Branch: master
Author:    Chris Plummer <cjplummer at openjdk.org>
Date:      2025-12-08 15:38:35 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ac81ce51fa4ed04b6dbcc28cb2dd8eabcfe52ad7

8372555: Test com/sun/jdi/ExceptionEvents.java failed: ObjectCollectedException

Reviewed-by: amenkov, dholmes

! test/jdk/com/sun/jdi/ExceptionEvents.java

Changeset: 355755d3
Branch: master
Author:    Anton Artemov <aartemov at openjdk.org>
Date:      2025-12-08 16:07:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/355755d35de5c3155d1ea8d1afdd0debe5296a13

8366671: Refactor Thread::SpinAcquire and Thread::SpinRelease

Co-authored-by: Axel Boldt-Christmas <aboldtch at openjdk.org>
Reviewed-by: coleenp, kbarrett, dholmes, aboldtch

! src/hotspot/share/jfr/recorder/service/jfrEventThrottler.cpp
! src/hotspot/share/jfr/support/jfrAdaptiveSampler.cpp
! src/hotspot/share/jfr/support/jfrThreadLocal.cpp
- src/hotspot/share/jfr/utilities/jfrSpinlockHelper.hpp
! src/hotspot/share/runtime/objectMonitor.cpp
! src/hotspot/share/runtime/park.cpp
! src/hotspot/share/runtime/safepointVerifiers.cpp
! src/hotspot/share/runtime/thread.cpp
! src/hotspot/share/runtime/thread.hpp
+ src/hotspot/share/utilities/spinCriticalSection.cpp
+ src/hotspot/share/utilities/spinCriticalSection.hpp
! test/hotspot/gtest/jfr/test_adaptiveSampler.cpp

Changeset: 811591c5
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-08 16:11:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/811591c5c332e6427dc96819451e046841fe635b

8373262: Parallel: gc/metaspace/CompressedClassSpaceSizeInJmapHeap.java fails

Reviewed-by: cjplummer

! src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/parallel/ParallelScavengeHeap.java

Changeset: d34ef196
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-08 18:51:34 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d34ef196c298aa91f8511714cfb04b15ae7fbf0a

8370198: Test gc/arguments/TestShrinkHeapInSteps.java crashed:  assert(left >= right) failed: avoid underflow

Reviewed-by: stefank, tschatzl

! src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp
! src/hotspot/cpu/riscv/macroAssembler_riscv.cpp
! src/hotspot/share/gc/serial/serialHeap.cpp
! src/hotspot/share/gc/serial/serialHeap.hpp

Changeset: b118caf6
Branch: master
Author:    Alexandre Iline <shurailine at openjdk.org>
Date:      2025-12-08 22:16:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b118caf6777cbf5bf75b41156fdfaaa15479f924

8373285: Update JCov for class file version 71

Reviewed-by: erikj

! make/conf/jib-profiles.js

Changeset: 8df3f3d3
Branch: master
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-08 22:45:59 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8df3f3d3417bc8fdb5a75d986e084441bbf6ebd2

8373117: Update build doc link in README.md

Reviewed-by: ayang, tbell

! README.md

Changeset: b86b2cbc
Branch: master
Author:    Ben Taylor <btaylor at openjdk.org>
Committer: Y. Srinivas Ramakrishna <ysr at openjdk.org>
Date:      2025-12-09 00:17:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b86b2cbc7d9dd57aeaf64f70f248a120ae3cb751

8352914: Shenandoah: Change definition of ShenandoahSharedValue to int32_t to leverage platform atomics

Reviewed-by: wkemper, ysr

! src/hotspot/share/gc/shenandoah/shenandoahSharedVariables.hpp

Changeset: c03d445a
Branch: master
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-09 00:34:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c03d445a8ccfced5a59da680c37587f1024f3eca

6223700: XP L&F: Non-TopLevel JMenu's painting error

Reviewed-by: kizune, dnguyen

! src/java.desktop/windows/classes/com/sun/java/swing/plaf/windows/WindowsMenuUI.java
+ test/jdk/javax/swing/JMenu/TestPaintSpillOverBug.java

Changeset: b1c95501
Branch: master
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-09 01:00:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b1c955018281a228a67695e5077666d751cd87d2

8372554: Test windows-x64-cmp-baseline failed due to differences with splashscreen object file

Reviewed-by: dholmes

! make/modules/java.desktop/lib/ClientLibraries.gmk

Changeset: 3ea82b9f
Branch: master
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-09 01:16:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3ea82b9ff90aebc1a169fdd967c44408dc4a4f51

8373272: Genshen: ShenandoahOldGenerationTest fails after JDK-8373056

Reviewed-by: wkemper

! test/hotspot/gtest/gc/shenandoah/test_shenandoahOldGeneration.cpp

Changeset: c9ab330b
Branch: master
Author:    Xiaolong Peng <xpeng at openjdk.org>
Date:      2025-12-09 03:28:11 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c9ab330b7bdd3cc2410ffdb336a63aa0ac7256a3

8373116: Genshen: arraycopy_work should be always done for arrays in old gen during young concurrent marking
8372498: [genshen] gc/TestAllocHumongousFragment.java#generational causes intermittent SIGSEGV crashes

Reviewed-by: wkemper, kdnilsen

! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.hpp
! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.inline.hpp

Changeset: 35fe0b11
Branch: master
Author:    Harshit470250 <133243171+Harshit470250 at users.noreply.github.com>
Committer: Amit Kumar <amitkumar at openjdk.org>
Date:      2025-12-09 04:59:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/35fe0b11015bd3a88ee21c76b54f9d4969fdedf6

8372641: [s390x] Test failure TestMergeStores.java

Reviewed-by: mhaessig, amitkumar, lucy

! src/hotspot/cpu/s390/s390.ad

Changeset: 020e3f95
Branch: master
Author:    David Holmes <dholmes at openjdk.org>
Date:      2025-12-09 05:15:47 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/020e3f959194029715c18891e79aeed020abd59c

8373293: Change the exception handling in TestNestHostErrorWithMultiThread.java

Reviewed-by: jpai, iklam

! test/hotspot/jtreg/runtime/Nestmates/membership/TestNestHostErrorWithMultiThread.java

Changeset: cba09cd1
Branch: master
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-09 07:40:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/cba09cd10d4e4482852a317786242836419c313b

5107379: Component orientation in JOptionPane is not proper in Motif L&F.

Reviewed-by: tr, kizune

! src/java.desktop/share/classes/com/sun/java/swing/plaf/motif/MotifOptionPaneUI.java
+ test/jdk/javax/swing/plaf/motif/TestIconRTL.java

Changeset: 3a8a6e07
Branch: master
Author:    Ramkumar Sunderbabu <rsunderbabu at openjdk.org>
Committer: Ivan Walulya <iwalulya at openjdk.org>
Date:      2025-12-09 09:15:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/3a8a6e07f2a2cffa467815df55e746e92765903d

8319326: GC: Make TestParallelRefProc use createTestJavaProcessBuilder

Reviewed-by: stefank, iwalulya

! test/hotspot/jtreg/gc/arguments/TestParallelRefProc.java

Changeset: 24244e41
Branch: master
Author:    Ramkumar Sunderbabu <rsunderbabu at openjdk.org>
Committer: Ivan Walulya <iwalulya at openjdk.org>
Date:      2025-12-09 09:17:38 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/24244e41210be5b71b9e8238badbf975ed4b02ef

8319161: GC: Make TestParallelGCThreads use createTestJavaProcessBuilder

Reviewed-by: stefank, iwalulya

! test/hotspot/jtreg/gc/arguments/TestParallelGCThreads.java

Changeset: 9c91c68d
Branch: master
Author:    Kevin Walls <kevinw at openjdk.org>
Date:      2025-12-09 09:18:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/9c91c68d1d5938d7e2b9a90c82b0a36ef1a063cd

8373111: Test java/lang/management/MemoryMXBean/MemoryManagement.java timed out

Reviewed-by: lmesnik

! test/jdk/java/lang/management/MemoryMXBean/MemoryManagement.java

Changeset: 786833cd
Branch: master
Author:    Joel Sikstr?m <jsikstro at openjdk.org>
Date:      2025-12-09 09:44:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/786833cd1bf8eda1cef25da392a055f4eb371abf

8373022: serviceability/sa/ClhsdbScanOops.java assumes no GC should occur

Reviewed-by: cjplummer, stefank, ayang, tschatzl

! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/serviceability/sa/ClhsdbScanOops.java

Changeset: 1f49edd9
Branch: master
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-09 10:02:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1f49edd9783ed4579d989d6939ee75e926f0716a

4459231: Focus of JTabbedPane(with Scrollable tablayout) changes on change in LookAndFeel

Reviewed-by: tr, kizune

! src/java.desktop/share/classes/javax/swing/plaf/basic/BasicTabbedPaneUI.java
+ test/jdk/javax/swing/JTabbedPane/TabbedPaneBugWithLNF.java

Changeset: 0a557890
Branch: master
Author:    Axel Boldt-Christmas <aboldtch at openjdk.org>
Date:      2025-12-09 10:04:25 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/0a557890a50b0dc83c70dc877027d951dcc05470

8373025: test/hotspot/jtreg/gc/cslocker/TestCSLocker.java may deadlock

Reviewed-by: ayang, tschatzl, stefank

! test/hotspot/jtreg/ProblemList.txt
! test/hotspot/jtreg/gc/cslocker/TestCSLocker.java
! test/hotspot/jtreg/gc/cslocker/libTestCSLocker.c

Changeset: 830c4d3b
Branch: master
Author:    Anton Artemov <aartemov at openjdk.org>
Date:      2025-12-09 10:15:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/830c4d3b198597b6af7a21b708bd3a852af200d4

8366272: The os::xxx APIs do not manage errno correctly

Reviewed-by: dholmes

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/posix/os_posix.cpp
! src/hotspot/os/posix/signals_posix.cpp
! src/hotspot/os/windows/os_windows.cpp

Changeset: a4eb57c5
Branch: master
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-09 12:45:36 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a4eb57c5ec6254e59e486042015dd00457284ef2

8367028: compiler/c2/irTests/TestFloat16ScalarOperations.java failing intermittently because of constant folding

Reviewed-by: chagedorn, syan, rcastanedalo

! test/hotspot/jtreg/compiler/c2/irTests/TestFloat16ScalarOperations.java

Changeset: 8c8d21db
Branch: master
Author:    Ioi Lam <iklam at openjdk.org>
Date:      2025-12-09 16:10:13 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8c8d21db6f5bdc35f6eddf91065b4eec462a716f

8373295: Wrong log tag for UseCompressedOops ergo setting

Reviewed-by: dholmes, ysuenaga

! src/hotspot/share/runtime/arguments.cpp
- test/hotspot/jtreg/runtime/cds/appcds/sharedStrings/SysDictCrash.java

Changeset: 831fe94c
Branch: master
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2025-12-09 17:01:08 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/831fe94c75c407b2399be9b89630d8d117c2996c

8373255: Unexpected iobj and ipdb files after JDK-8370438

Reviewed-by: serb

! make/common/native/Flags.gmk

Changeset: b99be505
Branch: master
Author:    Neha Joshi <neha.j.joshi at oracle.com>
Committer: Rajan Halade <rhalade at openjdk.org>
Date:      2025-12-09 18:06:39 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b99be505a5e3c8304be62a8b373d746fc52e8f0e

8368524: Tests are skipped and shown as passed in test/jdk/sun/security/pkcs11/Cipher/KeyWrap

Reviewed-by: myankelevich, rhalade

! test/jdk/sun/security/pkcs11/Cipher/KeyWrap/NISTWrapKAT.java
! test/jdk/sun/security/pkcs11/Cipher/KeyWrap/TestGeneral.java

Changeset: b2daf9de
Branch: master
Author:    Naoto Sato <naoto at openjdk.org>
Date:      2025-12-09 18:21:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b2daf9de3097de4d3b3c7d565e29a48b4aae19ee

8355522: Remove the `java.locale.useOldISOCodes` system property

Reviewed-by: jlu, joehw

! src/java.base/share/classes/java/util/Locale.java
! src/java.base/share/classes/jdk/internal/util/StaticProperty.java
! src/java.base/share/classes/sun/util/locale/BaseLocale.java
! src/java.base/share/classes/sun/util/locale/provider/LocaleResources.java
! test/jdk/java/util/Locale/LocaleTest.java
! test/jdk/java/util/Locale/UseOldISOCodesTest.java

Changeset: 1ae4a6c4
Branch: master
Author:    Matthew Donovan <mdonovan at openjdk.org>
Date:      2025-12-09 18:48:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1ae4a6c43ea21d4b147bcfcfaf1484c6e618dce5

8373101: JdkClient and JdkServer test classes ignore namedGroups field

Reviewed-by: rhalade

! test/jdk/javax/net/ssl/TLSCommon/interop/JdkClient.java
! test/jdk/javax/net/ssl/TLSCommon/interop/JdkServer.java

Changeset: 7f9951a9
Branch: master
Author:    Kim Barrett <kbarrett at openjdk.org>
Date:      2025-12-10 00:07:28 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/7f9951a93479ac0ddd74375fdef92095fb65741b

8373207: Make DeferredStatic class template constant initializable

Reviewed-by: jsjolen, stefank, iwalulya

! src/hotspot/share/utilities/deferredStatic.hpp

Changeset: eef9813a
Branch: master
Author:    Xueming Shen <sherman at openjdk.org>
Date:      2025-12-10 00:50:48 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/eef9813ad42b02db5fc636e661a751d5120a639e

8371446: VectorAPI: Add unit tests for masks from various long values

Reviewed-by: psandoz

! test/jdk/jdk/incubator/vector/AbstractVectorTest.java
! test/jdk/jdk/incubator/vector/Byte128VectorTests.java
! test/jdk/jdk/incubator/vector/Byte256VectorTests.java
! test/jdk/jdk/incubator/vector/Byte512VectorTests.java
! test/jdk/jdk/incubator/vector/Byte64VectorTests.java
! test/jdk/jdk/incubator/vector/ByteMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Double128VectorTests.java
! test/jdk/jdk/incubator/vector/Double256VectorTests.java
! test/jdk/jdk/incubator/vector/Double512VectorTests.java
! test/jdk/jdk/incubator/vector/Double64VectorTests.java
! test/jdk/jdk/incubator/vector/DoubleMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Float128VectorTests.java
! test/jdk/jdk/incubator/vector/Float256VectorTests.java
! test/jdk/jdk/incubator/vector/Float512VectorTests.java
! test/jdk/jdk/incubator/vector/Float64VectorTests.java
! test/jdk/jdk/incubator/vector/FloatMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Int128VectorTests.java
! test/jdk/jdk/incubator/vector/Int256VectorTests.java
! test/jdk/jdk/incubator/vector/Int512VectorTests.java
! test/jdk/jdk/incubator/vector/Int64VectorTests.java
! test/jdk/jdk/incubator/vector/IntMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Long128VectorTests.java
! test/jdk/jdk/incubator/vector/Long256VectorTests.java
! test/jdk/jdk/incubator/vector/Long512VectorTests.java
! test/jdk/jdk/incubator/vector/Long64VectorTests.java
! test/jdk/jdk/incubator/vector/LongMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Short128VectorTests.java
! test/jdk/jdk/incubator/vector/Short256VectorTests.java
! test/jdk/jdk/incubator/vector/Short512VectorTests.java
! test/jdk/jdk/incubator/vector/Short64VectorTests.java
! test/jdk/jdk/incubator/vector/ShortMaxVectorTests.java
! test/jdk/jdk/incubator/vector/gen-template.sh
+ test/jdk/jdk/incubator/vector/templates/Kernel-BoolBinary-op.template
+ test/jdk/jdk/incubator/vector/templates/Kernel-BoolUnary-op.template
+ test/jdk/jdk/incubator/vector/templates/Unit-BoolBinary-op.template
+ test/jdk/jdk/incubator/vector/templates/Unit-BoolUnary-op.template
+ test/jdk/jdk/incubator/vector/templates/Unit-Mask-FromToLong.template
! test/jdk/jdk/incubator/vector/templates/Unit-Miscellaneous.template
! test/jdk/jdk/incubator/vector/templates/Unit-header.template

Changeset: a2622129
Branch: master
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-10 02:04:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a26221299e657b64379d2d56ed3b073f12b227d1

8255463: java/nio/channels/spi/SelectorProvider/inheritedChannel/InheritedChannelTest.java failed with ThreadTimeoutException

Reviewed-by: dfuchs, djelinski, bpb

! test/jdk/java/nio/channels/spi/SelectorProvider/inheritedChannel/InheritedChannelTest.java

Changeset: b6732d60
Branch: master
Author:    Xiaohong Gong <xgong at openjdk.org>
Date:      2025-12-10 02:09:49 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b6732d6048259de68a3dd5b4f66ac82f87270404

8371603: C2: Missing Ideal optimizations for load and store vectors on SVE

Co-authored-by: Emanuel Peter <epeter at openjdk.org>
Reviewed-by: epeter, erfang, haosun

! src/hotspot/cpu/aarch64/aarch64_vector.ad
! src/hotspot/cpu/aarch64/aarch64_vector_ad.m4
! src/hotspot/share/opto/matcher.hpp
! src/hotspot/share/opto/vectornode.cpp
! src/hotspot/share/opto/vectornode.hpp
! test/hotspot/jtreg/compiler/lib/ir_framework/IRNode.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorLoadStoreOptimization.java
+ test/hotspot/jtreg/compiler/vectorapi/TestVectorOperationsWithPartialSize.java

Changeset: d36a234c
Branch: master
Author:    Ioi Lam <iklam at openjdk.org>
Date:      2025-12-10 02:26:04 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/d36a234c1228fdb12eb5931506ba1e03ebae95fc

8368701: CDS VerifierTest_1A.java failed on machines with 512 GB RAM

Reviewed-by: dholmes, lmesnik

! test/hotspot/jtreg/runtime/cds/appcds/VerifierTest.java

Changeset: a5968f93
Branch: master
Author:    Anjian Wen <wenanjian at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
Date:      2025-12-10 02:34:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/a5968f936462741a7edea5bbbe73cb067af3d34f

8371968: RISC-V: implement AES CBC intrinsics

Reviewed-by: fyang, fjiang

! src/hotspot/cpu/riscv/stubGenerator_riscv.cpp

Changeset: 1bbbce75
Branch: master
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2025-12-10 04:31:37 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/1bbbce75c5e68429c2a32519eb3c36d964dcdf57

6726690: SwingUtilities.replaceUI*Map() methods do not remove previously installed maps

Reviewed-by: azvegint, tr

! src/java.desktop/share/classes/javax/swing/SwingUtilities.java
+ test/jdk/javax/swing/SwingUtilities/UIMapTest.java

Changeset: 00068a80
Branch: master
Author:    Roland Westrelin <roland at openjdk.org>
Date:      2025-12-10 08:45:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/00068a80304a809297d0df8698850861e9a1c5e9

8354282: C2: more crashes in compiled code because of dependency on removed range check CastIIs

Reviewed-by: chagedorn, qamai, galder, epeter

! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp
! src/hotspot/share/opto/castnode.cpp
! src/hotspot/share/opto/castnode.hpp
! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/escape.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/loopTransform.cpp
! src/hotspot/share/opto/loopnode.cpp
! src/hotspot/share/opto/loopopts.cpp
! src/hotspot/share/opto/macroArrayCopy.cpp
! test/hotspot/jtreg/compiler/c2/irTests/TestPushAddThruCast.java
! test/hotspot/jtreg/compiler/rangechecks/TestArrayAccessAboveRCAfterRCCastIIEliminated.java

Changeset: b60ac710
Branch: master
Author:    Anton Seoane Ampudia <aseoane at openjdk.org>
Committer: Christian Hagedorn <chagedorn at openjdk.org>
Date:      2025-12-10 08:53:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b60ac710bebf195972436da324983e61b51484ef

8364490: Fatal error on large SpecTrapLimitExtraEntries value

Reviewed-by: chagedorn, roland

! src/hotspot/share/runtime/globals.hpp
+ test/hotspot/jtreg/compiler/arguments/TestSpecTrapLimitExtraEntries.java

Changeset: 8eaeb699
Branch: master
Author:    David Briemann <dbriemann at openjdk.org>
Date:      2025-12-10 10:21:42 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/8eaeb6990b85ac8717f4fc4ce883f674017b91f3

8372589: VM crashes on init when NonNMethodCodeHeapSize is set too small and UseTransparentHugePages is enabled

Reviewed-by: mdoerr, chagedorn

! src/hotspot/share/code/codeCache.cpp

Changeset: b58e3b60
Branch: master
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-10 12:08:53 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b58e3b600bb14bf7133eda0c37a4be4c82919d79

8373227: Test java/net/httpclient/http2/StreamFlowControlTest.java failed: should sleep time be raised?

Reviewed-by: djelinski

! test/jdk/java/net/httpclient/http2/StreamFlowControlTest.java

Changeset: 655e9cda
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-10 13:08:12 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/655e9cda3f6b1fa3a6f0553e7745aa088dde53e8

8373335: Serial: Clean up SerialHeap members by access specifies

Reviewed-by: jsikstro

! src/hotspot/share/gc/serial/serialHeap.cpp
! src/hotspot/share/gc/serial/serialHeap.hpp

Changeset: 54430a87
Branch: master
Author:    Daniel Fuchs <dfuchs at openjdk.org>
Date:      2025-12-10 15:14:46 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/54430a87226096725b13f05326d08629420657ca

8373362: Http3TestServer should not log an exception stack trace when it is stopping normally

Reviewed-by: jpai, djelinski

! test/jdk/java/net/httpclient/lib/jdk/httpclient/test/lib/http3/Http3ServerExchange.java
! test/jdk/java/net/httpclient/lib/jdk/httpclient/test/lib/http3/Http3TestServer.java

Changeset: 11aa6e10
Branch: master
Author:    Fairoz Matte <fmatte at openjdk.org>
Date:      2025-12-10 18:15:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/11aa6e10c017a7257c60eb7395d728d32b2006d4

8373270: GCC 14.2.0 reports warning: '%s' directive output may be truncated

Reviewed-by: kbarrett, dholmes, alanb

! src/java.base/unix/native/libjli/java_md_common.c

Changeset: 413f852b
Branch: master
Author:    Mat Carter <macarte at openjdk.org>
Committer: Ioi Lam <iklam at openjdk.org>
Date:      2025-12-10 18:49:30 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/413f852bdb4767b2a1c29431144616668888138d

8369736: Add management interface for AOT cache creation

Reviewed-by: mr, iklam, kevinw

! src/hotspot/share/cds/aotMetaspace.cpp
! src/hotspot/share/include/jvm.h
! src/hotspot/share/prims/jvm.cpp
! src/java.management/share/classes/sun/management/VMManagement.java
! src/java.management/share/classes/sun/management/VMManagementImpl.java
! src/java.management/share/native/libmanagement/VMManagementImpl.c
+ src/jdk.management/share/classes/com/sun/management/internal/HotSpotAOTCacheImpl.java
! src/jdk.management/share/classes/com/sun/management/internal/PlatformMBeanProviderImpl.java
+ src/jdk.management/share/classes/jdk/management/HotSpotAOTCacheMXBean.java
+ test/hotspot/jtreg/runtime/cds/appcds/aotCache/HotSpotAOTCacheMXBeanTest.java

Changeset: 52aa7fe1
Branch: master
Author:    Phil Race <prr at openjdk.org>
Date:      2025-12-10 21:40:18 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/52aa7fe1c970709fe387b70a5020ea0e77c4047f

8334549: [Sound] Test timed out: javax/sound/sampled/Clip/OpenNonIntegralNumberOfSampleframes.java

Reviewed-by: aivanov, kizune

! test/jdk/javax/sound/sampled/Clip/OpenNonIntegralNumberOfSampleframes.java

Changeset: 74dca863
Branch: master
Author:    Brian Burkhalter <bpb at openjdk.org>
Date:      2025-12-10 22:46:35 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/74dca863c2e61c13884c3454b8da7be125235970

8371718: (sc) Channels.new{Input,Output}Stream can allocate unbounded memory for a socket channel

Reviewed-by: alanb

! src/java.base/share/classes/sun/nio/ch/ChannelInputStream.java
! src/java.base/share/classes/sun/nio/ch/ChannelOutputStream.java
! src/java.base/share/classes/sun/nio/ch/NioSocketImpl.java
! src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java
! src/java.base/share/classes/sun/nio/ch/Streams.java
! test/jdk/java/nio/channels/Channels/SocketChannelStreams.java

Changeset: 920a99fa
Branch: master
Author:    Kevin Walls <kevinw at openjdk.org>
Date:      2025-12-11 07:44:10 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/920a99faeb6e0aee445df39cf8ddd43df18345d6

8370731: Tests in vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/ failed: OutOfMemoryError

Reviewed-by: sspitsyn

! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters001/CollectionCounters001.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters002/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters003/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters004/TestDescription.java
! test/hotspot/jtreg/vmTestbase/nsk/monitoring/GarbageCollectorMXBean/CollectionCounters/CollectionCounters005/TestDescription.java

Changeset: b46aef88
Branch: master
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-11 08:17:25 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b46aef88b333db8866c60c18cbf842b6cb89dacf

8371871: libSharedCloseAgent.cpp crashes VS2019 and older VS2022 compiler

Reviewed-by: jvernee, mdoerr

! test/jdk/java/foreign/sharedclosejvmti/libSharedCloseAgent.cpp

Changeset: 4b774cb4
Branch: master
Author:    Saranya Natarajan <snatarajan at openjdk.org>
Date:      2025-12-11 08:43:31 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/4b774cb46d9355015a6bfcf53b47233d6f235239

8370489: Some compiler tests miss the @key randomness

Reviewed-by: dfenacci, epeter, chagedorn

! test/hotspot/jtreg/compiler/c2/TestMergeStores.java
! test/hotspot/jtreg/compiler/c2/TestMergeStoresMemorySegment.java
! test/hotspot/jtreg/compiler/c2/TestMinMaxSubword.java
! test/hotspot/jtreg/compiler/c2/aarch64/TestFloat16Replicate.java
! test/hotspot/jtreg/compiler/c2/irTests/ModDNodeTests.java
! test/hotspot/jtreg/compiler/c2/irTests/ModFNodeTests.java
! test/hotspot/jtreg/compiler/c2/irTests/ModINodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/ModLNodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/TestMulNodeIdealization.java
! test/hotspot/jtreg/compiler/c2/irTests/TestShiftAndMask.java
! test/hotspot/jtreg/compiler/c2/irTests/UDivINodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/UDivLNodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/UModINodeIdealizationTests.java
! test/hotspot/jtreg/compiler/c2/irTests/UModLNodeIdealizationTests.java
! test/hotspot/jtreg/compiler/controldependency/TestDivDependentOnMainLoopGuard.java
! test/hotspot/jtreg/compiler/igvn/ExpressionFuzzer.java
! test/hotspot/jtreg/compiler/intrinsics/float16/TestFloat16MaxMinSpecialValues.java
! test/hotspot/jtreg/compiler/loopopts/InvariantCodeMotionReassociateAddSub.java
! test/hotspot/jtreg/compiler/loopopts/InvariantCodeMotionReassociateCmp.java
! test/hotspot/jtreg/compiler/loopopts/parallel_iv/TestParallelIvInIntCountedLoop.java
! test/hotspot/jtreg/compiler/loopopts/superword/MinMaxRed_Int.java
! test/hotspot/jtreg/compiler/loopopts/superword/ReductionPerf.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestAliasing.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestAlignVector.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestCompatibleUseDefTypeSize.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestDependencyOffsets.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestEquivalentInvariants.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestMemorySegment.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestMemorySegmentUnalignedAddress.java
! test/hotspot/jtreg/compiler/loopopts/superword/TestSplitPacks.java
! test/hotspot/jtreg/compiler/vectorapi/Test8278948.java
! test/hotspot/jtreg/compiler/vectorapi/TestVectorAddMulReduction.java
! test/hotspot/jtreg/compiler/vectorapi/TestVectorCompressExpandBits.java
! test/hotspot/jtreg/compiler/vectorapi/VectorMaskCastIdentityTest.java
! test/hotspot/jtreg/compiler/vectorapi/VectorMultiplyOpt.java
! test/hotspot/jtreg/compiler/vectorapi/VectorSaturatedOperationsTest.java
! test/hotspot/jtreg/compiler/vectorization/TestAutoVecIntMinMax.java
! test/hotspot/jtreg/compiler/vectorization/TestEor3AArch64.java
! test/hotspot/jtreg/compiler/vectorization/TestMacroLogicVector.java
! test/hotspot/jtreg/compiler/vectorization/TestVectorZeroCount.java

Changeset: 6a6ff876
Branch: master
Author:    Roman Marchenko <rmarchenko at openjdk.org>
Committer: Thomas Schatzl <tschatzl at openjdk.org>
Date:      2025-12-11 08:48:26 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/6a6ff876c515eba6cc89320e02dc5739d4540316

8372860: TestCodeCacheUnloadDuringConcCycle fails on ARM32

Reviewed-by: tschatzl, shade

! test/hotspot/jtreg/gc/g1/TestCodeCacheUnloadDuringConcCycle.java

Changeset: aa986be7
Branch: master
Author:    Albert Mingkun Yang <ayang at openjdk.org>
Date:      2025-12-11 10:56:20 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/aa986be7529b7a2950202dbe6885e5224d331078

8373421: Parallel: Rename young generation eden and survivor space pool

Reviewed-by: tschatzl, jsikstro

! src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.cpp
! src/hotspot/share/gc/parallel/psMemoryPool.hpp

Changeset: e1d1d53c
Branch: master
Author:    Daniel Gredler <dgredler at openjdk.org>
Date:      2025-12-11 13:53:01 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/e1d1d53cd1211b64d1fef03583a23056908b3482

8167268: StandardGlyphVector.getGlyphMetrics creates metrics with erroneous bounds for characters with no outline (e.g., the space character ' ')

Reviewed-by: serb, prr

! src/java.desktop/share/classes/sun/font/StandardGlyphVector.java
+ test/jdk/java/awt/font/GlyphVector/GlyphMetricsTest.java

Changeset: b0bd0c39
Branch: master
Author:    Matthias Baesken <mbaesken at openjdk.org>
Date:      2025-12-11 14:13:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/b0bd0c398ee0e0fd625eba1e7d9802a4e420a2c5

8372759: Test build/AbsPathsInImage.java fails after JDK-8370438

Reviewed-by: erikj

! make/autoconf/flags-ldflags.m4

Changeset: 2a1c676e
Branch: master
Author:    Ioi Lam <iklam at openjdk.org>
Date:      2025-12-11 14:33:44 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/2a1c676e0a1a357f75ea008e8e12c7ae9340b9b1

8373464: Test JdkManagementCheckSince.java fails after JDK-8369736

Reviewed-by: dholmes, shade, kevinw

! src/jdk.management/share/classes/jdk/management/HotSpotAOTCacheMXBean.java

Changeset: 692edc48
Branch: master
Author:    Nizar Benalla <nbenalla at openjdk.org>
Date:      2025-12-11 15:30:21 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/692edc4879489d44a477a03028eb3e7ef9dff388

8373443: Update --release 26 symbol information for JDK 26 build 27

Reviewed-by: jlahoda, iris, darcy

! src/jdk.compiler/share/data/symbols/java.base-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/java.sql-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.incubator.foreign-Q.sym.txt
+ src/jdk.compiler/share/data/symbols/jdk.jpackage-Q.sym.txt
! src/jdk.compiler/share/data/symbols/symbols

Changeset: 431dcf84
Branch: master
Author:    Daniel Gredler <dgredler at openjdk.org>
Date:      2025-12-11 20:15:45 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/431dcf84e9754c743105380ca69af647b57193bc

8368702: [macosx] Printing text with composite fonts loses font transform

Reviewed-by: psadhukhan, prr

! src/java.desktop/macosx/classes/sun/lwawt/macosx/CTextPipe.java
! test/jdk/java/awt/print/PrinterJob/PrintTextTest.java

Changeset: 66d7b0ce
Branch: master
Author:    Sergey Bylokhov <serb at openjdk.org>
Date:      2025-12-11 20:32:58 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/66d7b0ce8f8414c3d5fd3476b65152b9f2a9a587

8371657: [macosx] Programmatically selecting/deselecting List item triggers an ItemEvent

Reviewed-by: aivanov, azvegint, dnguyen, tr

! src/java.desktop/macosx/classes/sun/lwawt/LWListPeer.java
! test/jdk/ProblemList.txt
+ test/jdk/java/awt/List/NoEvents/ProgrammaticChange.java

Changeset: ae85d899
Branch: master
Author:    Xueming Shen <sherman at openjdk.org>
Date:      2025-12-11 20:47:32 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/ae85d899d074c531371dece30319ace701517528

8373389: Two jdk/incubator/vector/ tests fails after JDK-8371446

Reviewed-by: psandoz

! test/jdk/jdk/incubator/vector/AbstractVectorTest.java
! test/jdk/jdk/incubator/vector/Byte128VectorTests.java
! test/jdk/jdk/incubator/vector/Byte256VectorTests.java
! test/jdk/jdk/incubator/vector/Byte512VectorTests.java
! test/jdk/jdk/incubator/vector/Byte64VectorTests.java
! test/jdk/jdk/incubator/vector/ByteMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Double128VectorTests.java
! test/jdk/jdk/incubator/vector/Double256VectorTests.java
! test/jdk/jdk/incubator/vector/Double512VectorTests.java
! test/jdk/jdk/incubator/vector/Double64VectorTests.java
! test/jdk/jdk/incubator/vector/DoubleMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Float128VectorTests.java
! test/jdk/jdk/incubator/vector/Float256VectorTests.java
! test/jdk/jdk/incubator/vector/Float512VectorTests.java
! test/jdk/jdk/incubator/vector/Float64VectorTests.java
! test/jdk/jdk/incubator/vector/FloatMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Int128VectorTests.java
! test/jdk/jdk/incubator/vector/Int256VectorTests.java
! test/jdk/jdk/incubator/vector/Int512VectorTests.java
! test/jdk/jdk/incubator/vector/Int64VectorTests.java
! test/jdk/jdk/incubator/vector/IntMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Long128VectorTests.java
! test/jdk/jdk/incubator/vector/Long256VectorTests.java
! test/jdk/jdk/incubator/vector/Long512VectorTests.java
! test/jdk/jdk/incubator/vector/Long64VectorTests.java
! test/jdk/jdk/incubator/vector/LongMaxVectorTests.java
! test/jdk/jdk/incubator/vector/Short128VectorTests.java
! test/jdk/jdk/incubator/vector/Short256VectorTests.java
! test/jdk/jdk/incubator/vector/Short512VectorTests.java
! test/jdk/jdk/incubator/vector/Short64VectorTests.java
! test/jdk/jdk/incubator/vector/ShortMaxVectorTests.java

Changeset: c46bed72
Branch: master
Author:    Serguei Spitsyn <sspitsyn at openjdk.org>
Date:      2025-12-12 04:03:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/c46bed7292aad21b8cf9defcccac43c010a1f116

8371502: serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java failing

Reviewed-by: lmesnik, amenkov

! test/hotspot/jtreg/serviceability/jvmti/vthread/ThreadListStackTracesTest/ThreadListStackTracesTest.java

Changeset: 325cdb7f
Branch: master
Author:    Jaikiran Pai <jpai at openjdk.org>
Date:      2025-12-12 05:46:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/325cdb7fc5cd2ce1d2c2bf08ca064fb0f7e5a0b8

8373517: Revert the macos Tahoe specific change done in JDK-8359830

Reviewed-by: rriggs, bpb

! src/java.base/macosx/native/libjava/java_props_macosx.c

Changeset: 650de99f
Branch: master
Author:    Emanuel Peter <epeter at openjdk.org>
Date:      2025-12-12 07:17:17 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/650de99fc662a3e8473391627df9e523b6b80727

8367158: C2: create better fill and copy benchmarks, taking alignment into account

Reviewed-by: qamai, kvn

+ test/micro/org/openjdk/bench/vm/compiler/VectorBulkOperationsArray.java
+ test/micro/org/openjdk/bench/vm/compiler/VectorBulkOperationsMemorySegment.java

Changeset: dc625526
Branch: master
Author:    Hamlin Li <mli at openjdk.org>
Date:      2025-12-12 09:59:33 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/dc6255261f34c65d0e87814638817c97a880eb7f

8371920: [TEST] Enable CMove tests on other platforms

Reviewed-by: fyang, epeter

= test/hotspot/jtreg/compiler/c2/cmove/TestConditionalMove.java
= test/hotspot/jtreg/compiler/c2/cmove/TestFPComparison2.java
= test/hotspot/jtreg/compiler/c2/cmove/TestScalarConditionalMoveCmpObj.java

Changeset: f6fb82c1
Branch: master
Author:    duke <duke at openjdk.org>
Date:      2025-12-12 11:01:52 +0000
URL:       https://git.openjdk.org/panama-foreign/commit/f6fb82c1835ba8cc6e8e17b2c6da16411a3dd251

Automatic merge of jdk:master into master



From mr.chrisvest at gmail.com  Fri Dec 12 19:25:56 2025
From: mr.chrisvest at gmail.com (Chris Vest)
Date: Fri, 12 Dec 2025 11:25:56 -0800
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <5377e995-e0e2-4477-a7ac-ea7178dfba47@oracle.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
 <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
 <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>
 <60305e66-b7da-42e8-883c-a443fdaebfed@arm.com>
 <5377e995-e0e2-4477-a7ac-ea7178dfba47@oracle.com>
Message-ID: <CAHXi_0fRDOLUjXyJMmYXVGuHmYkyoafcfHMWVvOGRGXSqoymhw@mail.gmail.com>

Yeah, we previously also tried split counting, but reverted it because we
observed some weird rare issues, and got suspicious of it.

On Wed, Dec 10, 2025 at 8:21?AM Maurizio Cimadamore <
maurizio.cimadamore at oracle.com> wrote:

> What I like (a lot) about this is that now we're back to using the same
> "bit" of information for both liveness and acquire count (IIUC). If
> that's the case, it would be much simpler to convince ourselves this is
> correct.
>
> Thanks
> Maurizio
>
> On 10/12/2025 14:48, Stuart Monteith wrote:
> > Thanks Chris,
> >     I've taken a look and implemented SharedSession with something
> > similar to your RefCnt. One of the differences with SharedSession is
> > that we have a separate close method. I can implement acquire0 with
> > getAndAdd(2), release0 with getAndAdd(-2) and close with
> > compareAndSwap(0, 1). With the additional tests against 0x80000001 for
> > acquire0 and release0, I have something that passes the unit tests for
> > java/foreign.
> >
> > The benchmarking is quite promising, but I'll need to look more
> > closely at it - it doesn't scale better on all platforms.
> >
> > Thanks,
> >     Stuart
> >
> >
> >
> >
> > On 08/12/2025 19:45, Chris Vest wrote:
> >> For what it's worth, in Netty we implement our reference counting
> >> with incrementing by 2 instead of 1, and use the low odd bit to
> >> indicate the released state.
> >> This allows us to acquire using getAndAdd, which scales much better
> >> than a CAS loop.
> >> Unfortunately we still need to use a CAS loop when implementing
> >> release, so that still has contention problems.
> >>
> >> For reference:
> >>
> https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/src/main/java/io/__;!!ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$
> >> netty/util/internal/RefCnt.java#L258-L295
> >> <
> https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!!ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$
> >> common/src/main/java/io/netty/util/internal/RefCnt.java#L258-L295>
> >>
> >> On Mon, Dec 8, 2025 at 10:42?AM Maurizio Cimadamore
> >> <maurizio.cimadamore at oracle.com
> >> <mailto:maurizio.cimadamore at oracle.com>> wrote:
> >>
> >>
> >>      > sum() is really just a snapshot, it adds up the counters
> >> (Cells), so
> >>      > it wouldn't ensure the counter was at zero. Immediately after
> >>      > returning zero a thread could have already incremented it.
> >>     Yes. What I mean is: you can check if close() should throw
> >> because of
> >>     pending acquires. But, as I said, we can use that in any way to
> >> "block"
> >>     other acquires from happening in case we _do_ want to close. Which
> >>     leaves us exposed.
> >>      >
> >>      >
> >>      >> For the purpose of implementation clarity -- would it be
> >> useful to
> >>      >> wrap the various counters plus logic to acquire/ release (and
> >>      >> "closing" state) into a separate abstraction, which is then
> >> used by
> >>      >> SharedMemorySession? A sort of "atomic" LongAdder, if you
> >> will :-)
> >>      >>
> >>      >> That might make it easier to verify the correctness of the
> >>      >> implementation, by validating each aspect (the atomic long
> >> adder, and
> >>      >> its use from SharedMemorySession) separately.
> >>      >
> >>      > Sure, that would be a bit cleaner, thanks.
> >>
> >>     Thanks.
> >>
> >>
> >>     Maurizio
> >>
> >
>
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From stuart.monteith at arm.com  Sun Dec 14 23:07:08 2025
From: stuart.monteith at arm.com (Stuart Monteith)
Date: Sun, 14 Dec 2025 23:07:08 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <CAHXi_0fRDOLUjXyJMmYXVGuHmYkyoafcfHMWVvOGRGXSqoymhw@mail.gmail.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
 <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
 <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>
 <60305e66-b7da-42e8-883c-a443fdaebfed@arm.com>
 <5377e995-e0e2-4477-a7ac-ea7178dfba47@oracle.com>
 <CAHXi_0fRDOLUjXyJMmYXVGuHmYkyoafcfHMWVvOGRGXSqoymhw@mail.gmail.com>
Message-ID: <165cc8f4-0e0c-461c-888a-72ebe5dc8480@arm.com>

What I'm finding with the getAndAdd version is there is often an improvement, but the split counting, the multicounting 
as I called it, is much better in terms of performance (I'll share them in a week). I've tried to avoid weird issues 
with the split counting by having the code as simple as I could make it. Keeping the states consistent is important - if 
the code is in the middle of closing, it is important that getting the state of the counter pauses while that is decided.

BR,
	Stuart



On 12/12/2025 19:25, Chris Vest wrote:
> Yeah, we previously also tried split counting, but reverted it because we observed some weird rare issues, and got 
> suspicious of it.
> 
> On Wed, Dec 10, 2025 at 8:21?AM Maurizio Cimadamore <maurizio.cimadamore at oracle.com 
> <mailto:maurizio.cimadamore at oracle.com>> wrote:
> 
>     What I like (a lot) about this is that now we're back to using the same
>     "bit" of information for both liveness and acquire count (IIUC). If
>     that's the case, it would be much simpler to convince ourselves this is
>     correct.
> 
>     Thanks
>     Maurizio
> 
>     On 10/12/2025 14:48, Stuart Monteith wrote:
>      > Thanks Chris,
>      > ????I've taken a look and implemented SharedSession with something
>      > similar to your RefCnt. One of the differences with SharedSession is
>      > that we have a separate close method. I can implement acquire0 with
>      > getAndAdd(2), release0 with getAndAdd(-2) and close with
>      > compareAndSwap(0, 1). With the additional tests against 0x80000001 for
>      > acquire0 and release0, I have something that passes the unit tests for
>      > java/foreign.
>      >
>      > The benchmarking is quite promising, but I'll need to look more
>      > closely at it - it doesn't scale better on all platforms.
>      >
>      > Thanks,
>      > ????Stuart
>      >
>      >
>      >
>      >
>      > On 08/12/2025 19:45, Chris Vest wrote:
>      >> For what it's worth, in Netty we implement our reference counting
>      >> with incrementing by 2 instead of 1, and use the low odd bit to
>      >> indicate the released state.
>      >> This allows us to acquire using getAndAdd, which scales much better
>      >> than a CAS loop.
>      >> Unfortunately we still need to use a CAS loop when implementing
>      >> release, so that still has contention problems.
>      >>
>      >> For reference:
>      >> https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/
>     src/main/java/io/__;!!ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-
>     IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$ <https://urldefense.com/v3/__https://github.com/netty/netty/
>     blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/src/main/java/io/__;!!ACWV5N9M2RV99hQ!
>     JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$>
>      >> netty/util/internal/RefCnt.java#L258-L295
>      >> <https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!!
>     ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$
>     <https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!!
>     ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$>
>      >> common/src/main/java/io/netty/util/internal/RefCnt.java#L258-L295>
>      >>
>      >> On Mon, Dec 8, 2025 at 10:42?AM Maurizio Cimadamore
>      >> <maurizio.cimadamore at oracle.com <mailto:maurizio.cimadamore at oracle.com>
>      >> <mailto:maurizio.cimadamore at oracle.com <mailto:maurizio.cimadamore at oracle.com>>> wrote:
>      >>
>      >>
>      >> ???? > sum() is really just a snapshot, it adds up the counters
>      >> (Cells), so
>      >> ???? > it wouldn't ensure the counter was at zero. Immediately after
>      >> ???? > returning zero a thread could have already incremented it.
>      >> ??? Yes. What I mean is: you can check if close() should throw
>      >> because of
>      >> ??? pending acquires. But, as I said, we can use that in any way to
>      >> "block"
>      >> ??? other acquires from happening in case we _do_ want to close. Which
>      >> ??? leaves us exposed.
>      >> ???? >
>      >> ???? >
>      >> ???? >> For the purpose of implementation clarity -- would it be
>      >> useful to
>      >> ???? >> wrap the various counters plus logic to acquire/ release (and
>      >> ???? >> "closing" state) into a separate abstraction, which is then
>      >> used by
>      >> ???? >> SharedMemorySession? A sort of "atomic" LongAdder, if you
>      >> will :-)
>      >> ???? >>
>      >> ???? >> That might make it easier to verify the correctness of the
>      >> ???? >> implementation, by validating each aspect (the atomic long
>      >> adder, and
>      >> ???? >> its use from SharedMemorySession) separately.
>      >> ???? >
>      >> ???? > Sure, that would be a bit cleaner, thanks.
>      >>
>      >> ??? Thanks.
>      >>
>      >>
>      >> ??? Maurizio
>      >>
>      >
> 


From maurizio.cimadamore at oracle.com  Mon Dec 15 12:29:49 2025
From: maurizio.cimadamore at oracle.com (Maurizio Cimadamore)
Date: Mon, 15 Dec 2025 12:29:49 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <165cc8f4-0e0c-461c-888a-72ebe5dc8480@arm.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
 <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
 <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>
 <60305e66-b7da-42e8-883c-a443fdaebfed@arm.com>
 <5377e995-e0e2-4477-a7ac-ea7178dfba47@oracle.com>
 <CAHXi_0fRDOLUjXyJMmYXVGuHmYkyoafcfHMWVvOGRGXSqoymhw@mail.gmail.com>
 <165cc8f4-0e0c-461c-888a-72ebe5dc8480@arm.com>
Message-ID: <da76de4b-e294-48f4-99c1-c06b29f1bba5@oracle.com>

Another possibility would be to split the 64 bit state into, say 8-bit 
words.

Each word would act as a counter (up to 256 acquires, theoretically).

This would allow acquire/release/close to work on different parts of the 
state field (e.g. by issuing a byte-level CAS at the correct offset), 
while still allowing the close operation to atomically CAS the entire 
counter.

But, I'm not sure this would allow for better contention, as I'd assume 
that byte-level CAS will probably translate to a 64-bit CAS with some 
extra bit masking logic on top...

Maurizio

On 14/12/2025 23:07, Stuart Monteith wrote:
> What I'm finding with the getAndAdd version is there is often an 
> improvement, but the split counting, the multicounting as I called it, 
> is much better in terms of performance (I'll share them in a week). 
> I've tried to avoid weird issues with the split counting by having the 
> code as simple as I could make it. Keeping the states consistent is 
> important - if the code is in the middle of closing, it is important 
> that getting the state of the counter pauses while that is decided.
>
> BR,
> ????Stuart
>
>
>
> On 12/12/2025 19:25, Chris Vest wrote:
>> Yeah, we previously also tried split counting, but reverted it 
>> because we observed some weird rare issues, and got suspicious of it.
>>
>> On Wed, Dec 10, 2025 at 8:21?AM Maurizio Cimadamore 
>> <maurizio.cimadamore at oracle.com 
>> <mailto:maurizio.cimadamore at oracle.com>> wrote:
>>
>> ??? What I like (a lot) about this is that now we're back to using 
>> the same
>> ??? "bit" of information for both liveness and acquire count (IIUC). If
>> ??? that's the case, it would be much simpler to convince ourselves 
>> this is
>> ??? correct.
>>
>> ??? Thanks
>> ??? Maurizio
>>
>> ??? On 10/12/2025 14:48, Stuart Monteith wrote:
>> ???? > Thanks Chris,
>> ???? > ????I've taken a look and implemented SharedSession with 
>> something
>> ???? > similar to your RefCnt. One of the differences with 
>> SharedSession is
>> ???? > that we have a separate close method. I can implement acquire0 
>> with
>> ???? > getAndAdd(2), release0 with getAndAdd(-2) and close with
>> ???? > compareAndSwap(0, 1). With the additional tests against 
>> 0x80000001 for
>> ???? > acquire0 and release0, I have something that passes the unit 
>> tests for
>> ???? > java/foreign.
>> ???? >
>> ???? > The benchmarking is quite promising, but I'll need to look more
>> ???? > closely at it - it doesn't scale better on all platforms.
>> ???? >
>> ???? > Thanks,
>> ???? > ????Stuart
>> ???? >
>> ???? >
>> ???? >
>> ???? >
>> ???? > On 08/12/2025 19:45, Chris Vest wrote:
>> ???? >> For what it's worth, in Netty we implement our reference 
>> counting
>> ???? >> with incrementing by 2 instead of 1, and use the low odd bit to
>> ???? >> indicate the released state.
>> ???? >> This allows us to acquire using getAndAdd, which scales much 
>> better
>> ???? >> than a CAS loop.
>> ???? >> Unfortunately we still need to use a CAS loop when implementing
>> ???? >> release, so that still has contention problems.
>> ???? >>
>> ???? >> For reference:
>> ???? >> 
>> https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/
>> src/main/java/io/__;!!ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-
>> ??? IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$ 
>> <https://urldefense.com/v3/__https://github.com/netty/netty/
>> blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/src/main/java/io/__;!!ACWV5N9M2RV99hQ!
>> JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$>
>> ???? >> netty/util/internal/RefCnt.java#L258-L295
>> ???? >> 
>> <https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!!
>> ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$
>> <https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!!
>> ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$>
>> ???? >> 
>> common/src/main/java/io/netty/util/internal/RefCnt.java#L258-L295>
>> ???? >>
>> ???? >> On Mon, Dec 8, 2025 at 10:42?AM Maurizio Cimadamore
>> ???? >> <maurizio.cimadamore at oracle.com 
>> <mailto:maurizio.cimadamore at oracle.com>
>> ???? >> <mailto:maurizio.cimadamore at oracle.com 
>> <mailto:maurizio.cimadamore at oracle.com>>> wrote:
>> ???? >>
>> ???? >>
>> ???? >> ???? > sum() is really just a snapshot, it adds up the counters
>> ???? >> (Cells), so
>> ???? >> ???? > it wouldn't ensure the counter was at zero. 
>> Immediately after
>> ???? >> ???? > returning zero a thread could have already incremented 
>> it.
>> ???? >> ??? Yes. What I mean is: you can check if close() should throw
>> ???? >> because of
>> ???? >> ??? pending acquires. But, as I said, we can use that in any 
>> way to
>> ???? >> "block"
>> ???? >> ??? other acquires from happening in case we _do_ want to 
>> close. Which
>> ???? >> ??? leaves us exposed.
>> ???? >> ???? >
>> ???? >> ???? >
>> ???? >> ???? >> For the purpose of implementation clarity -- would it be
>> ???? >> useful to
>> ???? >> ???? >> wrap the various counters plus logic to acquire/ 
>> release (and
>> ???? >> ???? >> "closing" state) into a separate abstraction, which 
>> is then
>> ???? >> used by
>> ???? >> ???? >> SharedMemorySession? A sort of "atomic" LongAdder, if 
>> you
>> ???? >> will :-)
>> ???? >> ???? >>
>> ???? >> ???? >> That might make it easier to verify the correctness 
>> of the
>> ???? >> ???? >> implementation, by validating each aspect (the atomic 
>> long
>> ???? >> adder, and
>> ???? >> ???? >> its use from SharedMemorySession) separately.
>> ???? >> ???? >
>> ???? >> ???? > Sure, that would be a bit cleaner, thanks.
>> ???? >>
>> ???? >> ??? Thanks.
>> ???? >>
>> ???? >>
>> ???? >> ??? Maurizio
>> ???? >>
>> ???? >
>>
>

From maurizio.cimadamore at oracle.com  Mon Dec 15 13:33:04 2025
From: maurizio.cimadamore at oracle.com (Maurizio Cimadamore)
Date: Mon, 15 Dec 2025 13:33:04 +0000
Subject: Improve scaling of downcalls using MemorySegments allocated with
 shared arenas
In-Reply-To: <da76de4b-e294-48f4-99c1-c06b29f1bba5@oracle.com>
References: <3506dd6c-ef3d-4d4b-972b-fe83bb5debd8@arm.com>
 <b99f35e0-7683-4f7c-ba52-32eed1e9c83e@oracle.com>
 <f2f357a4-ba8b-4063-9a69-0a7cc1371e9e@arm.com>
 <c1756b90-6b03-4477-a18b-f41738cf1cb3@oracle.com>
 <f2091319-88f8-4dae-823a-e8f1d7598cf8@arm.com>
 <71229468-1ec8-47b0-a063-c0cc3e9cc8af@oracle.com>
 <CAHXi_0fMF8ZMnC1n54j6U81wiwQ_pPFQEG7UWkgZjQFEOpt3rw@mail.gmail.com>
 <60305e66-b7da-42e8-883c-a443fdaebfed@arm.com>
 <5377e995-e0e2-4477-a7ac-ea7178dfba47@oracle.com>
 <CAHXi_0fRDOLUjXyJMmYXVGuHmYkyoafcfHMWVvOGRGXSqoymhw@mail.gmail.com>
 <165cc8f4-0e0c-461c-888a-72ebe5dc8480@arm.com>
 <da76de4b-e294-48f4-99c1-c06b29f1bba5@oracle.com>
Message-ID: <fd93dc38-e816-4cd0-9ed5-379c9ef4f7f0@oracle.com>

There's also plenty of literarure around a multi-word CAS (MCAS) that 
feature the "disjoint-access parallel" property you want -- example

https://arxiv.org/pdf/2008.02527

They all seem to split the work in two phases:

* first, they create a descriptor for the MCAS operation they want to 
perform, and atomically set (with CAS) that into each memory address 
affected by the MCAS operation
* _after_ all affected locations have been correctly acquired with the 
same descriptor, we proceed to actually perform the desired CAS on all 
of them

This is general, but also very complex, as now we need some logic to 
allocate new descriptors and deallocate them when no longer needed -- 
which likely undoes any speedup achieved by using this more complex 
algorithm.

Of course we can take inspiration from this -- the closing thread could 
use a special value to signal that he wants to "own" all the counters 
(this can be done with a CAS from the expected non-acquired value to the 
special value).

Only if the closing thread manages to successfully set this special 
values on all the counters will it proceed to close the arena.

If something went wrong, and the special value cannot be set on some 
counters, the close fails (that means some acquire operation managed to 
sneak in between), and the counter state has to be reset for all the 
updated couters.

(perhaps this same logic can also be used to avoid close vs. close 
races, as one of the closing thread will see some counters _already_ in 
the special state, which means some other thread is attempting to close).

This seems quite similar to the approach Stuart tried to implement here:

https://github.com/openjdk/jdk/pull/28575

Cheers
Maurizio


On 15/12/2025 12:29, Maurizio Cimadamore wrote:
> Another possibility would be to split the 64 bit state into, say 8-bit 
> words.
>
> Each word would act as a counter (up to 256 acquires, theoretically).
>
> This would allow acquire/release/close to work on different parts of 
> the state field (e.g. by issuing a byte-level CAS at the correct 
> offset), while still allowing the close operation to atomically CAS 
> the entire counter.
>
> But, I'm not sure this would allow for better contention, as I'd 
> assume that byte-level CAS will probably translate to a 64-bit CAS 
> with some extra bit masking logic on top...
>
> Maurizio
>
> On 14/12/2025 23:07, Stuart Monteith wrote:
>> What I'm finding with the getAndAdd version is there is often an 
>> improvement, but the split counting, the multicounting as I called 
>> it, is much better in terms of performance (I'll share them in a 
>> week). I've tried to avoid weird issues with the split counting by 
>> having the code as simple as I could make it. Keeping the states 
>> consistent is important - if the code is in the middle of closing, it 
>> is important that getting the state of the counter pauses while that 
>> is decided.
>>
>> BR,
>> ????Stuart
>>
>>
>>
>> On 12/12/2025 19:25, Chris Vest wrote:
>>> Yeah, we previously also tried split counting, but reverted it 
>>> because we observed some weird rare issues, and got suspicious of it.
>>>
>>> On Wed, Dec 10, 2025 at 8:21?AM Maurizio Cimadamore 
>>> <maurizio.cimadamore at oracle.com 
>>> <mailto:maurizio.cimadamore at oracle.com>> wrote:
>>>
>>> ??? What I like (a lot) about this is that now we're back to using 
>>> the same
>>> ??? "bit" of information for both liveness and acquire count (IIUC). If
>>> ??? that's the case, it would be much simpler to convince ourselves 
>>> this is
>>> ??? correct.
>>>
>>> ??? Thanks
>>> ??? Maurizio
>>>
>>> ??? On 10/12/2025 14:48, Stuart Monteith wrote:
>>> ???? > Thanks Chris,
>>> ???? > ????I've taken a look and implemented SharedSession with 
>>> something
>>> ???? > similar to your RefCnt. One of the differences with 
>>> SharedSession is
>>> ???? > that we have a separate close method. I can implement 
>>> acquire0 with
>>> ???? > getAndAdd(2), release0 with getAndAdd(-2) and close with
>>> ???? > compareAndSwap(0, 1). With the additional tests against 
>>> 0x80000001 for
>>> ???? > acquire0 and release0, I have something that passes the unit 
>>> tests for
>>> ???? > java/foreign.
>>> ???? >
>>> ???? > The benchmarking is quite promising, but I'll need to look more
>>> ???? > closely at it - it doesn't scale better on all platforms.
>>> ???? >
>>> ???? > Thanks,
>>> ???? > ????Stuart
>>> ???? >
>>> ???? >
>>> ???? >
>>> ???? >
>>> ???? > On 08/12/2025 19:45, Chris Vest wrote:
>>> ???? >> For what it's worth, in Netty we implement our reference 
>>> counting
>>> ???? >> with incrementing by 2 instead of 1, and use the low odd bit to
>>> ???? >> indicate the released state.
>>> ???? >> This allows us to acquire using getAndAdd, which scales much 
>>> better
>>> ???? >> than a CAS loop.
>>> ???? >> Unfortunately we still need to use a CAS loop when implementing
>>> ???? >> release, so that still has contention problems.
>>> ???? >>
>>> ???? >> For reference:
>>> ???? >> 
>>> https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/
>>> src/main/java/io/__;!!ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ- 
>>>
>>> ??? IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$ 
>>> <https://urldefense.com/v3/__https://github.com/netty/netty/
>>> blob/2b29b5e87656203fecd1732ffb472a366a1918cc/common/src/main/java/io/__;!!ACWV5N9M2RV99hQ! 
>>>
>>> JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr6DvTDI0$> 
>>>
>>> ???? >> netty/util/internal/RefCnt.java#L258-L295
>>> ???? >> 
>>> <https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!!
>>> ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$ 
>>>
>>> <https://urldefense.com/v3/__https://github.com/netty/netty/blob/2b29b5e87656203fecd1732ffb472a366a1918cc/__;!! 
>>>
>>> ACWV5N9M2RV99hQ!JMRywug9hgGI_tWR1jAjiE8gIGbCfu9ZYKUrgzQiG8A3Woj6cYJa4S-ZKJ-IteJDrpe0GexRIhlFIKg6zUpWV3sr9MgkwZk$> 
>>>
>>> ???? >> 
>>> common/src/main/java/io/netty/util/internal/RefCnt.java#L258-L295>
>>> ???? >>
>>> ???? >> On Mon, Dec 8, 2025 at 10:42?AM Maurizio Cimadamore
>>> ???? >> <maurizio.cimadamore at oracle.com 
>>> <mailto:maurizio.cimadamore at oracle.com>
>>> ???? >> <mailto:maurizio.cimadamore at oracle.com 
>>> <mailto:maurizio.cimadamore at oracle.com>>> wrote:
>>> ???? >>
>>> ???? >>
>>> ???? >> ???? > sum() is really just a snapshot, it adds up the counters
>>> ???? >> (Cells), so
>>> ???? >> ???? > it wouldn't ensure the counter was at zero. 
>>> Immediately after
>>> ???? >> ???? > returning zero a thread could have already 
>>> incremented it.
>>> ???? >> ??? Yes. What I mean is: you can check if close() should throw
>>> ???? >> because of
>>> ???? >> ??? pending acquires. But, as I said, we can use that in any 
>>> way to
>>> ???? >> "block"
>>> ???? >> ??? other acquires from happening in case we _do_ want to 
>>> close. Which
>>> ???? >> ??? leaves us exposed.
>>> ???? >> ???? >
>>> ???? >> ???? >
>>> ???? >> ???? >> For the purpose of implementation clarity -- would 
>>> it be
>>> ???? >> useful to
>>> ???? >> ???? >> wrap the various counters plus logic to acquire/ 
>>> release (and
>>> ???? >> ???? >> "closing" state) into a separate abstraction, which 
>>> is then
>>> ???? >> used by
>>> ???? >> ???? >> SharedMemorySession? A sort of "atomic" LongAdder, 
>>> if you
>>> ???? >> will :-)
>>> ???? >> ???? >>
>>> ???? >> ???? >> That might make it easier to verify the correctness 
>>> of the
>>> ???? >> ???? >> implementation, by validating each aspect (the 
>>> atomic long
>>> ???? >> adder, and
>>> ???? >> ???? >> its use from SharedMemorySession) separately.
>>> ???? >> ???? >
>>> ???? >> ???? > Sure, that would be a bit cleaner, thanks.
>>> ???? >>
>>> ???? >> ??? Thanks.
>>> ???? >>
>>> ???? >>
>>> ???? >> ??? Maurizio
>>> ???? >>
>>> ???? >
>>>
>>