February 2022 - aarch64-port-dev

Simple HTTP server app crashes on JDK 11 and 8 on OSv AArch64
by Waldek Kozaczuk 05 Mar '22

05 Mar '22

Hi, I am one of the committers to the OSv project (http://osv.io/) OSv is is a Linux-compatible unikernel. OSv has been able to run unmodified Linux version of Java very well since early on including Java 7 all the way to Java 14 (or possibly including the latest one) on x86_64. However, I have discovered some problems trying to run JVM apps on OSv aarch64 port which probably has some gaps compared to x64_64. And I am looking for some hints or help, in general, to figure out what exactly might be the cause of this issue. In essence, a simple HTTP server app (see the code in the link - https://github.com/cloudius-systems/osv-apps/blob/master/java-httpserver/Ht…) crashes once I sent some requests using curl. The crash looks like this on openjdk11: OSv v0.55.0-241-g8d4039b3 eth0: 192.168.122.15 Booted up in 61.89 ms Cmdline: /usr/lib/jvm/java/bin/java -cp /java-httpserver HttpServerApp ! Listening on port 8000 ... # # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000200009248830, pid=2, tid=47 # # JRE version: OpenJDK Runtime Environment (11.0.10+9) (build 11.0.10+9-Ubuntu-0ubuntu1.20.10) # Java VM: OpenJDK 64-Bit Server VM (11.0.10+9-Ubuntu-0ubuntu1.20.10, mixed mode, tiered, compressed oops, serial gc, linux-aarch64) # Problematic frame: # v ~BufferBlob::I2C/C2I adapters # # Core dump will be written. Default location: core.2 (may not exist) # # An error report file with more information is saved as: # /tmp/hs_err_pid2.log Could not load hsdis-aarch64.so; library not loadable; PrintAssembly is disabled # # If you would like to submit a bug report, please visit: # https://bugs.launchpad.net/ubuntu/+source/openjdk-lts # # # A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000200009248830, pid=2, tid=47 # # JRE version: OpenJDK Runtime Environment (11.0.10+9) (build 11.0.10+9-Ubuntu-0ubuntu1.20.10) # Java VM: OpenJDK 64-Bit Server VM (11.0.10+9-Ubuntu-0ubuntu1.20.10, mixed mode, tiered, compressed oops, serial gc, linux-aarch64) # Problematic frame: # v ~BufferBlob::I2C/C2I adapters # # Core dump will be written. Default location: core.2 (may not exist) # # If you would like to submit a bug report, please visit: # https://bugs.launchpad.net/ubuntu/+source/openjdk-lts # --------------- S U M M A R Y ------------ Command Line: HttpServerApp Host: AArch64, 1 cores, 1G, Linux Time: Sat Apr 24 04:10:05 2021 UTC elapsed time: 13.255518 seconds (0d 0h 0m 13s) --------------- T H R E A D --------------- Current thread (0xffff900042e8b000): JavaThread "HTTP-Dispatcher" [_thread_in_Java, id=47, stack(0x000020007a801000,0x000020007aa00000)] Stack: [0x000020007a801000,0x000020007aa00000], sp=0x000020007a9fdb40, free space=2034k Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code) v ~BufferBlob::I2C/C2I adapters J 356 c1 java.lang.invoke.InvokerBytecodeGenerator.emitStaticInvoke(Ljava/lang/invoke/MemberName;Ljava/lang/invoke/LambdaForm$Name;)V java.base(a)11.0.10 (258 bytes) @ 0x000020000982c21c [0x000020000982be00+0x000000000000041c] C 0x0000200078a6de18 siginfo: si_signo: 11 (SIGSEGV), si_code: 2057296688 (unknown), si_errno: 8192, si_addr: 0x0000a00042f0f000 Please see this issue details for full output including core dump and state of registers - https://github.com/cloudius-systems/osv/issues/1157#issue-933793577. It is interesting, that when I disable JIT by adding '-X int' to the java command line, the app works flawlessly. That makes me thinks that the problem most likely happens somewhere in JVM when bytecode is translated into aarch64 machine code to be exxecuted later. I wonder if possibly it has to do with ARM I-cache/D-cache synchronization (see https://community.arm.com/developer/ip-products/processors/b/processors-ip-…) which somehow is not well supported by OSv. I actually had to fix a similar problem in OSv MMU code (see https://github.com/cloudius-systems/osv/commit/71919b9bb50604da56dec0ebe6cd…) to make sure that any page fault to populate page with executable permission calls *__builtin___clear_cache*() which was essential when loading any application ELF file in memory. I am guessing, in case of JIT it must be more complicated but presumably JVM also needs to clear I-cache after the machine code is generated and loaded into memory before execution. Obviously it is still my speculation. But that is where I need more hints and possibly pointers to the JVM code to help me understand what is going on. It would be nice if I could understand how the JIT works to some extent especially as far as interactions with Linux kernel go and what possibly might be wrong/missing in OSv aarch64 port. I am also speculating that JDK 8 crashes on OSv even though looking different might be have same root cause: OSv v0.55.0-266-g5aedb749 eth0: 192.168.122.15 Booted up in 92.21 ms Cmdline: java.so -cp /java-example Hello java.so: Starting JVM app using: io/osv/nonisolated/RunNonIsolatedJvmApp java.so: Setting Java system classloader to NonIsolatingOsvSystemClassLoader # # A fatal error has been detected by the Java Runtime Environment: # # Internal Error (assembler_aarch64.hpp:237), pid=2, tid=0xffffa0004109c630 # guarantee(val < (1U << nbits)) failed: Field too big for insn # # JRE version: (8.0_282-b08) (build ) # Java VM: OpenJDK 64-Bit Server VM (25.282-b08 mixed mode linux-aarch64 compressed oops) # Core dump written. Default location: //core or core.2 # # An error report file with more information is saved as: # /tmp/hs_err_pid2.log # # If you would like to submit a bug report, please visit: # http://bugreport.java.com/bugreport/crash.jsp # Aborted [backtrace] 0x000010000097a750 <???+9938768> 0x0000100000b90590 <???+12125584> See https://github.com/cloudius-systems/osv/issues/1145 for details. Any help would be greatly appreciated. Best regards, Waldek

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git: openjdk/aarch64-port: master: 8271008: appcds/*/MethodHandlesAsCollectorTest.java tests time out because of excessive GC (CodeCache GC Threshold) in loom
by Coleen Phillimore 22 Feb '22

22 Feb '22

Changeset: 022d8070 Author: Coleen Phillimore <coleenp(a)openjdk.org> Date: 2022-02-22 13:42:56 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/022d80707c346f4b82ac1eb53e… 8271008: appcds/*/MethodHandlesAsCollectorTest.java tests time out because of excessive GC (CodeCache GC Threshold) in loom Reviewed-by: thartmann, eosterlund ! src/hotspot/share/code/codeCache.cpp ! src/hotspot/share/code/codeCache.hpp ! src/hotspot/share/compiler/compilationPolicy.cpp ! src/hotspot/share/runtime/sweeper.cpp ! src/hotspot/share/runtime/sweeper.hpp

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git: openjdk/aarch64-port: master: 8260328: Drop redundant CSS properties from java.desktop HTML files
by Alexey Ivanov 22 Feb '22

22 Feb '22

Changeset: ab6d8e64 Author: Alexey Ivanov <aivanov(a)openjdk.org> Date: 2022-02-22 13:19:43 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/ab6d8e6424aa478eb7661d1d38… 8260328: Drop redundant CSS properties from java.desktop HTML files Reviewed-by: serb, dmarkov ! src/java.desktop/share/classes/javax/swing/plaf/synth/doc-files/componentProperties.html

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git: openjdk/aarch64-port: master: 8282220: contentType should not be a PKCS7's member
by John Jiang 22 Feb '22

22 Feb '22

Changeset: b95310b0 Author: John Jiang <jjiang(a)openjdk.org> Date: 2022-02-22 09:35:48 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/b95310b0908037c6743b937ae4… 8282220: contentType should not be a PKCS7's member Reviewed-by: xuelei ! src/java.base/share/classes/sun/security/pkcs/PKCS7.java

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git: openjdk/aarch64-port: master: 8281543: Remove unused code/headerfile dtraceAttacher.hpp
by Tobias Hartmann 22 Feb '22

22 Feb '22

Changeset: bc43320f Author: Emanuel Peter <emanuel.peter(a)oracle.com> Committer: Tobias Hartmann <thartmann(a)openjdk.org> Date: 2022-02-22 07:55:04 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/bc43320fd32debf863f37dc00e… 8281543: Remove unused code/headerfile dtraceAttacher.hpp Reviewed-by: thartmann ! src/hotspot/os/aix/attachListener_aix.cpp ! src/hotspot/os/bsd/attachListener_bsd.cpp ! src/hotspot/os/linux/attachListener_linux.cpp ! src/hotspot/os/windows/attachListener_windows.cpp - src/hotspot/share/services/dtraceAttacher.hpp

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git: openjdk/aarch64-port: master: 8281745: Create a regression test for JDK-4514331
by Abdul Kolarkunnu 22 Feb '22

22 Feb '22

Changeset: f9539521 Author: Manukumar V S <mvs(a)openjdk.org> Committer: Abdul Kolarkunnu <akolarkunnu(a)openjdk.org> Date: 2022-02-22 07:31:55 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/f9539521aee71e84cb052d3d04… 8281745: Create a regression test for JDK-4514331 Reviewed-by: serb + test/jdk/javax/swing/JTextArea/4514331/TabShiftsFocusToNextComponent.java

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git: openjdk/aarch64-port: master: 8282190: Typo in javadoc of java.time.format.DateTimeFormatter#getDecimalStyle
by Jaikiran Pai 22 Feb '22

22 Feb '22

Changeset: e0b49629 Author: Jaikiran Pai <jpai(a)openjdk.org> Date: 2022-02-22 01:39:28 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/e0b49629e95c98aabe8b75ec2f… 8282190: Typo in javadoc of java.time.format.DateTimeFormatter#getDecimalStyle Reviewed-by: dfuchs, rriggs, lancea, iris ! src/java.base/share/classes/java/time/format/DateTimeFormatter.java

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git: openjdk/aarch64-port: master: 8281523: Accessibility: Conversion from string literal loses const qualifier
by Alexey Ivanov 21 Feb '22

21 Feb '22

Changeset: e1c98bd1 Author: Daniel Jeliński <djelinski(a)openjdk.org> Committer: Alexey Ivanov <aivanov(a)openjdk.org> Date: 2022-02-21 17:40:27 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/e1c98bd1f2f57ddf47e4660038… 8281523: Accessibility: Conversion from string literal loses const qualifier Reviewed-by: prr, aivanov, kizune ! src/jdk.accessibility/windows/native/common/AccessBridgeDebug.cpp ! src/jdk.accessibility/windows/native/common/AccessBridgeDebug.h ! src/jdk.accessibility/windows/native/jaccessinspector/jaccessinspector.cpp ! src/jdk.accessibility/windows/native/libwindowsaccessbridge/AccessBridgeEventHandler.cpp ! src/jdk.accessibility/windows/native/libwindowsaccessbridge/AccessBridgeJavaVMInstance.cpp ! src/jdk.accessibility/windows/native/libwindowsaccessbridge/AccessBridgeMessageQueue.cpp ! src/jdk.accessibility/windows/native/libwindowsaccessbridge/WinAccessBridge.cpp ! src/jdk.accessibility/windows/native/toolscommon/AccessInfo.cpp ! src/jdk.accessibility/windows/native/toolscommon/AccessInfo.h

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git: openjdk/aarch64-port: master: 8280861: Robot color picker broken on Linux with scaling above 100%
by Anton Tarasov 21 Feb '22

21 Feb '22

Changeset: cc7cf812 Author: Maxim Kartashev <maxim.kartashev(a)jetbrains.com> Committer: Anton Tarasov <ant(a)openjdk.org> Date: 2022-02-21 11:39:29 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/cc7cf81256ed4d74493472017b… 8280861: Robot color picker broken on Linux with scaling above 100% Reviewed-by: serb ! src/java.desktop/unix/native/libawt_xawt/awt/awt_Robot.c ! src/java.desktop/unix/native/libawt_xawt/awt/gtk2_interface.c ! src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c ! src/java.desktop/unix/native/libawt_xawt/awt/gtk_interface.h ! test/jdk/java/awt/Robot/HiDPIScreenCapture/HiDPIRobotScreenCaptureTest.java + test/jdk/java/awt/Robot/HiDPIScreenCapture/ScreenCaptureGtkTest.java ! test/jdk/javax/swing/JPasswordField/TestSelectedTextBackgroundColor.java ! test/jdk/javax/swing/JProgressBar/TestJProgressBarHighlightColor.java ! test/jdk/javax/swing/JSlider/TestJSliderRendering.java ! test/jdk/javax/swing/JSpinner/TestSelectedTextBackgroundColor.java ! test/jdk/javax/swing/JTextPane/TestJTextPaneBackgroundColor.java ! test/jdk/javax/swing/JToolTip/TestTooltipBackgroundColor.java

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git: openjdk/aarch64-port: master: 8253757: Add LLVM-based backend for hsdis
by Magnus Ihse Bursie 21 Feb '22

21 Feb '22

Changeset: d7a706a5 Author: Magnus Ihse Bursie <ihse(a)openjdk.org> Date: 2022-02-21 10:37:44 +0000 URL: https://git.openjdk.java.net/aarch64-port/commit/d7a706a54076109b1a600a4d96… 8253757: Add LLVM-based backend for hsdis Co-authored-by: Magnus Ihse Bursie <ihse(a)openjdk.org> Co-authored-by: Ludovic Henry <luhenry(a)openjdk.org> Co-authored-by: Jorn Vernee <jvernee(a)openjdk.org> Co-authored-by: Nick Gasson <ngasson(a)openjdk.org> Reviewed-by: erikj, luhenry ! make/Hsdis.gmk ! make/autoconf/jdk-options.m4 ! src/utils/hsdis/README.md + src/utils/hsdis/llvm/hsdis-llvm.cpp

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