From shade at openjdk.java.net  Mon Mar  8 18:23:27 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Mon, 8 Mar 2021 18:23:27 GMT
Subject: RFR: CODETOOLS-7902835: JOL: ObjectShapes.processJAR should close
 resources properly
Message-ID: <GdonUqV3vrpgL8030yq6OM5TePHn0Sq5tNO2ZQc7s4E=.db8f5985-738f-42a4-b276-760bf45e1e53@github.com>

SonarCloud instance reports a few easy-to-fix issues in this method.

-------------

Commit messages:
 - Fix whitespace
 - CODETOOLS-7902835: JOL: ObjectShapes.processJAR should close resources properly

Changes: https://git.openjdk.java.net/jol/pull/9/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jol&pr=9&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902835
  Stats: 7 lines in 1 file changed: 0 ins; 3 del; 4 mod
  Patch: https://git.openjdk.java.net/jol/pull/9.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/9/head:pull/9

PR: https://git.openjdk.java.net/jol/pull/9

From duke at openjdk.java.net  Mon Mar  8 18:35:45 2021
From: duke at openjdk.java.net (duke)
Date: Mon, 8 Mar 2021 18:35:45 GMT
Subject: git: openjdk/jol: CODETOOLS-7902835: JOL: ObjectShapes.processJAR
 should close resources properly
Message-ID: <6bd59c6d-6c7e-451b-86fc-67800cbcfe23@openjdk.java.net>

Changeset: 1f34d1b5
Author:    Aleksey Shipil?v <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2021-03-08 19:35:21 +0000
URL:       https://git.openjdk.java.net/jol/commit/1f34d1b5

CODETOOLS-7902835: JOL: ObjectShapes.processJAR should close resources properly


! jol-cli/src/main/java/org/openjdk/jol/operations/ObjectShapes.java


From shade at openjdk.java.net  Mon Mar  8 18:38:12 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Mon, 8 Mar 2021 18:38:12 GMT
Subject: Withdrawn: CODETOOLS-7902835: JOL: ObjectShapes.processJAR should
 close resources properly
In-Reply-To: <GdonUqV3vrpgL8030yq6OM5TePHn0Sq5tNO2ZQc7s4E=.db8f5985-738f-42a4-b276-760bf45e1e53@github.com>
References: <GdonUqV3vrpgL8030yq6OM5TePHn0Sq5tNO2ZQc7s4E=.db8f5985-738f-42a4-b276-760bf45e1e53@github.com>
Message-ID: <tTEkcrxpfDCo2My0YbN7tfnFEz7wSUP9g-1ejAVB8sg=.661aa840-7fb6-47a1-b34f-07d2e468e7d8@github.com>

On Mon, 8 Mar 2021 18:18:54 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> SonarCloud instance reports a few easy-to-fix issues in this method.

This pull request has been closed without being integrated.

-------------

PR: https://git.openjdk.java.net/jol/pull/9

From shade at openjdk.java.net  Mon Mar  8 18:39:17 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Mon, 8 Mar 2021 18:39:17 GMT
Subject: RFR: CODETOOLS-7902836: JOL: Fix incorrect implicit numeric promotions
Message-ID: <b5C-PnIE-Cmoamyff8KQwPJF3IaZQ3MvJIAHVTD5cFY=.c041c86e-d89c-42c9-ac66-a91b800c6339@github.com>

SonarCloud instance reports a few places where implicit promotions are not what we want them to be. The most notorious please is in HeapDumpReader::digestObjArray.

-------------

Commit messages:
 - CODETOOLS-7902836: JOL: Fix incorrect implicit numeric promotions

Changes: https://git.openjdk.java.net/jol/pull/10/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jol&pr=10&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902836
  Stats: 8 lines in 2 files changed: 3 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jol/pull/10.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/10/head:pull/10

PR: https://git.openjdk.java.net/jol/pull/10

From shade at openjdk.java.net  Mon Mar  8 18:56:12 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Mon, 8 Mar 2021 18:56:12 GMT
Subject: Withdrawn: CODETOOLS-7902836: JOL: Fix incorrect implicit numeric
 promotions
In-Reply-To: <b5C-PnIE-Cmoamyff8KQwPJF3IaZQ3MvJIAHVTD5cFY=.c041c86e-d89c-42c9-ac66-a91b800c6339@github.com>
References: <b5C-PnIE-Cmoamyff8KQwPJF3IaZQ3MvJIAHVTD5cFY=.c041c86e-d89c-42c9-ac66-a91b800c6339@github.com>
Message-ID: <RUuuMsoa1lEwHcXcxPcQleDob1EbUTU4Zbp-vyf3q3o=.d0e8fe3a-f0ba-4b50-8ad8-d9cf48cc8b05@github.com>

On Mon, 8 Mar 2021 18:34:50 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> SonarCloud instance reports a few places where implicit promotions are not what we want them to be. The most notorious please is in HeapDumpReader::digestObjArray.

This pull request has been closed without being integrated.

-------------

PR: https://git.openjdk.java.net/jol/pull/10

From duke at openjdk.java.net  Mon Mar  8 19:49:19 2021
From: duke at openjdk.java.net (duke)
Date: Mon, 8 Mar 2021 19:49:19 GMT
Subject: git: openjdk/jol: CODETOOLS-7902836: JOL: Fix incorrect implicit
 numeric promotions
Message-ID: <b1489ab0-437b-4c7b-a957-1f2d85e74847@openjdk.java.net>

Changeset: bdd2c2df
Author:    Aleksey Shipil?v <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2021-03-08 19:54:01 +0000
URL:       https://git.openjdk.java.net/jol/commit/bdd2c2df

CODETOOLS-7902836: JOL: Fix incorrect implicit numeric promotions


! jol-core/src/main/java/org/openjdk/jol/heap/HeapDumpReader.java
! jol-core/src/main/java/org/openjdk/jol/info/GraphLayout.java


From shade at openjdk.java.net  Mon Mar 29 13:21:51 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Mon, 29 Mar 2021 13:21:51 GMT
Subject: RFR: CODETOOLS-7902866: JOL: Rework the instance dump output:
 formatting, decoding mark/class words, array length
Message-ID: <LgnP4CtWYEe_hZJ3heju3dOuA0LmWMmZeu52qgJEi-4=.fac78a54-f8cf-44c0-9c63-ba35cee8799d@github.com>

JOL already knows a lot about the target VM. It can also decode the object headers more verbosely.

-------------

Commit messages:
 - CODETOOLS-7902866: JOL: Rework the instance dump output: formatting, decoding mark/class words, array length
 - Decode mark word

Changes: https://git.openjdk.java.net/jol/pull/11/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jol&pr=11&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902866
  Stats: 231 lines in 7 files changed: 155 ins; 23 del; 53 mod
  Patch: https://git.openjdk.java.net/jol/pull/11.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/11/head:pull/11

PR: https://git.openjdk.java.net/jol/pull/11

From duke at openjdk.java.net  Mon Mar 29 13:24:44 2021
From: duke at openjdk.java.net (duke)
Date: Mon, 29 Mar 2021 13:24:44 GMT
Subject: git: openjdk/jol: CODETOOLS-7902866: JOL: Rework the instance dump
 output: formatting, decoding mark/class words, array length
Message-ID: <ee114004-66cc-4691-9a49-2c5edbc957c5@openjdk.java.net>

Changeset: cc7c063d
Author:    Aleksey Shipil?v <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2021-03-29 15:24:19 +0000
URL:       https://git.openjdk.java.net/jol/commit/cc7c063d

CODETOOLS-7902866: JOL: Rework the instance dump output: formatting, decoding mark/class words, array length


! README.md
! jol-core/src/main/java/org/openjdk/jol/info/ClassLayout.java
! jol-core/src/main/java/org/openjdk/jol/vm/HotspotUnsafe.java
! jol-core/src/main/java/org/openjdk/jol/vm/VMOptions.java
! jol-core/src/main/java/org/openjdk/jol/vm/VirtualMachine.java
! jol-core/src/main/java/org/openjdk/jol/vm/sa/UniverseData.java
! jol-core/src/main/java/org/openjdk/jol/vm/sa/UniverseTask.java


From shade at openjdk.java.net  Mon Mar 29 13:27:39 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Mon, 29 Mar 2021 13:27:39 GMT
Subject: Withdrawn: CODETOOLS-7902866: JOL: Rework the instance dump output:
 formatting, decoding mark/class words, array length
In-Reply-To: <LgnP4CtWYEe_hZJ3heju3dOuA0LmWMmZeu52qgJEi-4=.fac78a54-f8cf-44c0-9c63-ba35cee8799d@github.com>
References: <LgnP4CtWYEe_hZJ3heju3dOuA0LmWMmZeu52qgJEi-4=.fac78a54-f8cf-44c0-9c63-ba35cee8799d@github.com>
Message-ID: <OqStoCPO2wO0NhBUi6LmR5-ZujDS6LOF9k8uAp4TYow=.de08539e-95e2-488a-92ef-dc299805b4a6@github.com>

On Mon, 29 Mar 2021 13:17:19 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> JOL already knows a lot about the target VM. It can also decode the object headers more verbosely.
> 
> `JOLSample_14_FatLocking` example output:
> 
> $ ~/Install/jdk11u-dev/bin/java -cp jol-samples/target/jol-samples.jar org.openjdk.jol.samples.JOLSample_14_FatLocking
> # WARNING: Unable to get Instrumentation. Dynamic Attach failed. You may add this JAR as -javaagent manually, or supply -Djdk.attach.allowAttachSelf
> # Running 64-bit HotSpot VM.
> # Using compressed oop with 3-bit shift.
> # Using compressed klass with 0x0000000800000000 base address and 0-bit shift.
> # Objects are 8 bytes aligned.
> # Field sizes by type: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]
> # Array element sizes: 4, 1, 1, 2, 2, 4, 4, 8, 8 [bytes]
> 
> **** Fresh object
> org.openjdk.jol.samples.JOLSample_14_FatLocking$A object internals:
> OFF  SZ   TYPE DESCRIPTION               VALUE
>   0   8        (object header: mark)     0x0000000000000005 (biasable; age: 0)
>   8   4        (object header: class)    0x000d5d08
>  12   4        (object alignment gap)    
> Instance size: 16 bytes
> Space losses: 0 bytes internal + 4 bytes external = 4 bytes total
> 
> **** Before the lock
> org.openjdk.jol.samples.JOLSample_14_FatLocking$A object internals:
> OFF  SZ   TYPE DESCRIPTION               VALUE
>   0   8        (object header: mark)     0x00007f5eec70c005 (biased: 0x0000001fd7bb1c30; epoch: 0; age: 0)
>   8   4        (object header: class)    0x000d5d08
>  12   4        (object alignment gap)    
> Instance size: 16 bytes
> Space losses: 0 bytes internal + 4 bytes external = 4 bytes total
> 
> **** With the lock
> org.openjdk.jol.samples.JOLSample_14_FatLocking$A object internals:
> OFF  SZ   TYPE DESCRIPTION               VALUE
>   0   8        (object header: mark)     0x00007f5e64008682 (fat lock: 0x00007f5e64008682)
>   8   4        (object header: class)    0x000d5d08
>  12   4        (object alignment gap)    
> Instance size: 16 bytes
> Space losses: 0 bytes internal + 4 bytes external = 4 bytes total
> 
> **** After the lock
> org.openjdk.jol.samples.JOLSample_14_FatLocking$A object internals:
> OFF  SZ   TYPE DESCRIPTION               VALUE
>   0   8        (object header: mark)     0x00007f5e64008682 (fat lock: 0x00007f5e64008682)
>   8   4        (object header: class)    0x000d5d08
>  12   4        (object alignment gap)    
> Instance size: 16 bytes
> Space losses: 0 bytes internal + 4 bytes external = 4 bytes total
> 
> **** After System.gc()
> org.openjdk.jol.samples.JOLSample_14_FatLocking$A object internals:
> OFF  SZ   TYPE DESCRIPTION               VALUE
>   0   8        (object header: mark)     0x0000000000000001 (non-biasable; age: 0)
>   8   4        (object header: class)    0x000d5d08
>  12   4        (object alignment gap)    
> Instance size: 16 bytes
> Space losses: 0 bytes internal + 4 bytes external = 4 bytes total

This pull request has been closed without being integrated.

-------------

PR: https://git.openjdk.java.net/jol/pull/11

From shade at openjdk.java.net  Tue Mar 30 12:35:32 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 12:35:32 GMT
Subject: RFR: CODETOOLS-7902867: JOL: Use defined data model to print the
 header in class layout
Message-ID: <bxQ-B12S-jXmAytXOzNgZpSdhCrimgsTZCnExxAyXaE=.837479f9-1f66-42c3-bd59-444bdee326ca@github.com>

JOLSample_10_DataModels does not work properly after CODETOOLS-7902866. It only takes care of the "actual" VM layout, ignoring the defined data model. We need to make ClassLayout accept the data model.

-------------

Commit messages:
 - Remove excess imports
 - Remodel data model

Changes: https://git.openjdk.java.net/jol/pull/12/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jol&pr=12&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902867
  Stats: 974 lines in 20 files changed: 573 ins; 340 del; 61 mod
  Patch: https://git.openjdk.java.net/jol/pull/12.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/12/head:pull/12

PR: https://git.openjdk.java.net/jol/pull/12

From shade at openjdk.java.net  Tue Mar 30 12:39:38 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 12:39:38 GMT
Subject: RFR: CODETOOLS-7902867: JOL: Use defined data model to print the
 header in class layout [v2]
In-Reply-To: <bxQ-B12S-jXmAytXOzNgZpSdhCrimgsTZCnExxAyXaE=.837479f9-1f66-42c3-bd59-444bdee326ca@github.com>
References: <bxQ-B12S-jXmAytXOzNgZpSdhCrimgsTZCnExxAyXaE=.837479f9-1f66-42c3-bd59-444bdee326ca@github.com>
Message-ID: <96f0I8bnmqUNcd4EG4KORin5B4YemtXLoemUBTBabdg=.5f1971e3-8ec4-4a4b-8e84-d535d907e29e@github.com>

> JOLSample_10_DataModels does not work properly after CODETOOLS-7902866. It only takes care of the "actual" VM layout, ignoring the defined data model. We need to make ClassLayout accept the data model.

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Rename CCPTR to CCPS

-------------

Changes:
  - all: https://git.openjdk.java.net/jol/pull/12/files
  - new: https://git.openjdk.java.net/jol/pull/12/files/4d910e5f..51e23363

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jol&pr=12&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jol&pr=12&range=00-01

  Stats: 22 lines in 6 files changed: 0 ins; 0 del; 22 mod
  Patch: https://git.openjdk.java.net/jol/pull/12.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/12/head:pull/12

PR: https://git.openjdk.java.net/jol/pull/12

From duke at openjdk.java.net  Tue Mar 30 12:47:51 2021
From: duke at openjdk.java.net (duke)
Date: Tue, 30 Mar 2021 12:47:51 GMT
Subject: git: openjdk/jol: CODETOOLS-7902867: JOL: Use defined data model to
 print the header in class layout
Message-ID: <b5274af1-bb31-46b4-8beb-6c1ab703665e@openjdk.java.net>

Changeset: 25e78a0c
Author:    Aleksey Shipil?v <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2021-03-30 14:47:38 +0000
URL:       https://git.openjdk.java.net/jol/commit/25e78a0c

CODETOOLS-7902867: JOL: Use defined data model to print the header in class layout


! jol-cli/src/main/java/org/openjdk/jol/operations/HeapDumpStats.java
! jol-cli/src/main/java/org/openjdk/jol/operations/ObjectEstimates.java
! jol-cli/src/main/java/org/openjdk/jol/operations/StringCompress.java
- jol-core/src/main/java/org/openjdk/jol/datamodel/CurrentDataModel.java
! jol-core/src/main/java/org/openjdk/jol/datamodel/DataModel.java
+ jol-core/src/main/java/org/openjdk/jol/datamodel/Model32.java
+ jol-core/src/main/java/org/openjdk/jol/datamodel/Model64.java
+ jol-core/src/main/java/org/openjdk/jol/datamodel/Model64_CCPS.java
+ jol-core/src/main/java/org/openjdk/jol/datamodel/Model64_COOPS_CCPS.java
+ jol-core/src/main/java/org/openjdk/jol/datamodel/ModelVM.java
- jol-core/src/main/java/org/openjdk/jol/datamodel/X86_32_DataModel.java
- jol-core/src/main/java/org/openjdk/jol/datamodel/X86_64_COOPS_DataModel.java
- jol-core/src/main/java/org/openjdk/jol/datamodel/X86_64_DataModel.java
! jol-core/src/main/java/org/openjdk/jol/info/ClassLayout.java
! jol-core/src/main/java/org/openjdk/jol/layouters/CurrentLayouter.java
! jol-core/src/main/java/org/openjdk/jol/layouters/HotSpotLayouter.java
! jol-core/src/main/java/org/openjdk/jol/layouters/RawLayouter.java
! jol-core/src/test/java/org/openjdk/jol/layouters/HotspotLayouterRealTest.java
! jol-core/src/test/java/org/openjdk/jol/layouters/LayouterInvariantsTest.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_10_DataModels.java


From shade at openjdk.java.net  Tue Mar 30 12:50:13 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 12:50:13 GMT
Subject: Withdrawn: CODETOOLS-7902867: JOL: Use defined data model to print
 the header in class layout
In-Reply-To: <bxQ-B12S-jXmAytXOzNgZpSdhCrimgsTZCnExxAyXaE=.837479f9-1f66-42c3-bd59-444bdee326ca@github.com>
References: <bxQ-B12S-jXmAytXOzNgZpSdhCrimgsTZCnExxAyXaE=.837479f9-1f66-42c3-bd59-444bdee326ca@github.com>
Message-ID: <kYVUuiOD_KRDxBc51SmWbM3TTltCwI5ssWk8kBI_gm4=.702a5a8d-b2e7-45a6-8b50-836e6e180133@github.com>

On Tue, 30 Mar 2021 12:26:11 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> JOLSample_10_DataModels does not work properly after CODETOOLS-7902866. It only takes care of the "actual" VM layout, ignoring the defined data model. We need to make ClassLayout accept the data model.

This pull request has been closed without being integrated.

-------------

PR: https://git.openjdk.java.net/jol/pull/12

From shade at openjdk.java.net  Tue Mar 30 12:59:35 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 12:59:35 GMT
Subject: RFR: CODETOOLS-7902868: JOL: Rework JOL Samples for modern JDKs
Message-ID: <25jsvl6X6owY61CUbC6GX5fyriszHcjdDm1sQ5mytoM=.a1f1bbc1-69c3-49a8-bce9-e9bdea008d7a@github.com>

Current JOL samples were written in the era of JDK 8. Since then, quite a few improvements landed in JVMs, and we need to update the samples to reflect those.

-------------

Commit messages:
 - Fix builds
 - Add missing files
 - Revert again
 - Revert after merge
 - Merge branch 'master' into samples-overhaul
 - Overhaul JOL Samples

Changes: https://git.openjdk.java.net/jol/pull/13/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jol&pr=13&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902868
  Stats: 751 lines in 32 files changed: 399 ins; 309 del; 43 mod
  Patch: https://git.openjdk.java.net/jol/pull/13.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/13/head:pull/13

PR: https://git.openjdk.java.net/jol/pull/13

From shade at openjdk.java.net  Tue Mar 30 16:56:38 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 16:56:38 GMT
Subject: RFR: CODETOOLS-7902868: JOL: Rework JOL Samples for modern JDKs
 [v2]
In-Reply-To: <25jsvl6X6owY61CUbC6GX5fyriszHcjdDm1sQ5mytoM=.a1f1bbc1-69c3-49a8-bce9-e9bdea008d7a@github.com>
References: <25jsvl6X6owY61CUbC6GX5fyriszHcjdDm1sQ5mytoM=.a1f1bbc1-69c3-49a8-bce9-e9bdea008d7a@github.com>
Message-ID: <HlSLCjto-PKANDY__xL67RHczncPKgo1rNTzqgIq1Fk=.7b5ca64f-a887-4803-9c48-05b622661c13@github.com>

> Current JOL samples were written in the era of JDK 8. Since then, quite a few improvements landed in JVMs, and we need to update the samples to reflect those.

Aleksey Shipilev has updated the pull request incrementally with two additional commits since the last revision:

 - Reshuffle test order
 - Contended without explicit imports

-------------

Changes:
  - all: https://git.openjdk.java.net/jol/pull/13/files
  - new: https://git.openjdk.java.net/jol/pull/13/files/7fe001b8..b811c002

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jol&pr=13&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jol&pr=13&range=00-01

  Stats: 77 lines in 14 files changed: 60 ins; 1 del; 16 mod
  Patch: https://git.openjdk.java.net/jol/pull/13.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/13/head:pull/13

PR: https://git.openjdk.java.net/jol/pull/13

From duke at openjdk.java.net  Tue Mar 30 17:02:47 2021
From: duke at openjdk.java.net (duke)
Date: Tue, 30 Mar 2021 17:02:47 GMT
Subject: git: openjdk/jol: CODETOOLS-7902868: JOL: Rework JOL Samples for
 modern JDKs
Message-ID: <769e479e-1735-4cd2-b1e4-d5e53ec16ce3@openjdk.java.net>

Changeset: 7ef9c724
Author:    Aleksey Shipil?v <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2021-03-30 19:02:22 +0000
URL:       https://git.openjdk.java.net/jol/commit/7ef9c724

CODETOOLS-7902868: JOL: Rework JOL Samples for modern JDKs


= jol-samples/src/main/java/jdk/internal/vm/annotation/Contended.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_01_Basic.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_02_Alignment.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_03_Packing.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_04_Inheritance.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_05_InheritanceBarrier.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_05_SuperGaps.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_06_Gaps.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_06_HierarchyGaps.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_07_Exceptions.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_08_Class.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_09_Contended.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_10_DataModels.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_11_ClassWord.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_12_BiasedLocking.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_12_ThinLocking.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_13_BiasedLocking.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_13_ThinLocking.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_14_FatLocking.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_15_IdentityHashCode.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_16_IHC_BL_Conflict.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_17_Allocation.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_17_ArrayLength.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_18_ArrayAlignment.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_19_AL_LL.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_19_Promotion.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_20_Allocation.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_21_Arrays.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_21_Layouts.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_22_Promotion.java
- jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_23_Defragmentation.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_23_Roots.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_24_Arrays.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_25_Compaction.java
+ jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_26_Defragmentation.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_27_Colocation.java
= jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_28_Difference.java


From shade at openjdk.java.net  Tue Mar 30 17:05:21 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 17:05:21 GMT
Subject: Withdrawn: CODETOOLS-7902868: JOL: Rework JOL Samples for modern JDKs
In-Reply-To: <25jsvl6X6owY61CUbC6GX5fyriszHcjdDm1sQ5mytoM=.a1f1bbc1-69c3-49a8-bce9-e9bdea008d7a@github.com>
References: <25jsvl6X6owY61CUbC6GX5fyriszHcjdDm1sQ5mytoM=.a1f1bbc1-69c3-49a8-bce9-e9bdea008d7a@github.com>
Message-ID: <KTFuLvqz7vfJCJYtnjoxdquLIx5DI-9kTDr--PHu0mw=.ea9d762f-7746-40d1-a359-f4937b6939f4@github.com>

On Tue, 30 Mar 2021 12:52:19 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Current JOL samples were written in the era of JDK 8. Since then, quite a few improvements landed in JVMs, and we need to update the samples to reflect those.

This pull request has been closed without being integrated.

-------------

PR: https://git.openjdk.java.net/jol/pull/13

From shade at openjdk.java.net  Tue Mar 30 17:51:33 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 17:51:33 GMT
Subject: RFR: CODETOOLS-7902869: JOL: Support JDK 15+ field layouter simulation
Message-ID: <Sqx5TA6W-Kory86P_m_6Hkefd8vIMXyiYpbtTguCRbg=.d1a4bba8-74ce-4292-a7ff-e3cc277757d0@github.com>

JDK-8237767 added a new layouter. JOL needs to simulate it as well.

-------------

Commit messages:
 - Minor cleanup
 - Merge branch 'master' into jdk15-layouter
 - Add JDK 15 Hotspot layouter simulation

Changes: https://git.openjdk.java.net/jol/pull/14/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jol&pr=14&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902869
  Stats: 169 lines in 9 files changed: 130 ins; 15 del; 24 mod
  Patch: https://git.openjdk.java.net/jol/pull/14.diff
  Fetch: git fetch https://git.openjdk.java.net/jol pull/14/head:pull/14

PR: https://git.openjdk.java.net/jol/pull/14

From duke at openjdk.java.net  Tue Mar 30 18:01:17 2021
From: duke at openjdk.java.net (duke)
Date: Tue, 30 Mar 2021 18:01:17 GMT
Subject: git: openjdk/jol: CODETOOLS-7902869: JOL: Support JDK 15+ field
 layouter simulation
Message-ID: <fddd5bbf-fff3-4d9a-9643-8e16d3fa4cc2@openjdk.java.net>

Changeset: 320f2ee7
Author:    Aleksey Shipil?v <shade at redhat.com>
Committer: GitHub <noreply at github.com>
Date:      2021-03-30 20:00:48 +0000
URL:       https://git.openjdk.java.net/jol/commit/320f2ee7

CODETOOLS-7902869: JOL: Support JDK 15+ field layouter simulation


! jol-cli/src/main/java/org/openjdk/jol/operations/HeapDumpStats.java
! jol-cli/src/main/java/org/openjdk/jol/operations/ObjectEstimates.java
! jol-cli/src/main/java/org/openjdk/jol/operations/StringCompress.java
! jol-core/src/main/java/org/openjdk/jol/info/ClassData.java
! jol-core/src/main/java/org/openjdk/jol/info/FieldData.java
! jol-core/src/main/java/org/openjdk/jol/layouters/HotSpotLayouter.java
! jol-core/src/test/java/org/openjdk/jol/layouters/HotspotLayouterRealTest.java
! jol-core/src/test/java/org/openjdk/jol/layouters/LayouterInvariantsTest.java
! jol-samples/src/main/java/org/openjdk/jol/samples/JOLSample_10_DataModels.java


From shade at openjdk.java.net  Tue Mar 30 18:03:18 2021
From: shade at openjdk.java.net (Aleksey Shipilev)
Date: Tue, 30 Mar 2021 18:03:18 GMT
Subject: Withdrawn: CODETOOLS-7902869: JOL: Support JDK 15+ field layouter
 simulation
In-Reply-To: <Sqx5TA6W-Kory86P_m_6Hkefd8vIMXyiYpbtTguCRbg=.d1a4bba8-74ce-4292-a7ff-e3cc277757d0@github.com>
References: <Sqx5TA6W-Kory86P_m_6Hkefd8vIMXyiYpbtTguCRbg=.d1a4bba8-74ce-4292-a7ff-e3cc277757d0@github.com>
Message-ID: <Co4kaORIQ-sK3remKsxky1r_LoKc8L-DEPqAV1bp2gc=.c6443329-793e-460d-8358-f0eb7a1ec93c@github.com>

On Tue, 30 Mar 2021 17:47:28 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> JDK-8237767 added a new layouter. JOL needs to simulate it as well.

This pull request has been closed without being integrated.

-------------

PR: https://git.openjdk.java.net/jol/pull/14

From shade at redhat.com  Wed Mar 31 08:22:29 2021
From: shade at redhat.com (Aleksey Shipilev)
Date: Wed, 31 Mar 2021 10:22:29 +0200
Subject: JOL 0.15
Message-ID: <a627a221-82f4-660a-c506-8af863dfe3f0@redhat.com>

Hi,

JOL 0.14 is released and available on Maven Central. This release ships with multiple performance 
and compatibility fixes.

  *) ClassLayout now prints the detailed information on object headers: decoding mark words, 
printing class word, array length, etc
   7902866: JOL: Rework the instance dump output: formatting, decoding mark/class words, array length
   7902867: JOL: Use defined data model to print the header in class layout

  *) Layout simulations (for example, "estimates") are now able to simulate JDK 15+ field layouter
   7902869: JOL: Support JDK 15+ field layouter simulation

  *) Lots of performance improvements for graph walking: better field caching, better stack 
management, etc.
   - Use shared ClassValue for caching resolved Class fields
   - Eagerly do setAccessible(true) on first Field resolves in walkers
   - Optimize MathUtil.align to avoid modulo/division
   - Replace ArrayDeque with SimpleStack

  *) New GraphStats, a lightweight version of GraphLayout
    https://github.com/openjdk/jol/commit/c928a570665ba203f0b1ba8b4a6f87bdf1c10232

  *) Some fixes for SonarCloud warnings
    7902835: JOL: ObjectShapes.processJAR should close resources properly
    7902836: JOL: Fix incorrect implicit numeric promotions

  *) JOL Samples are reworked to capture VM improvements since JDK 8
    7902868: JOL: Rework JOL Samples for modern JDKs

Enjoy!

-- 
Thanks,
-Aleksey


From shade at redhat.com  Wed Mar 31 08:24:29 2021
From: shade at redhat.com (Aleksey Shipilev)
Date: Wed, 31 Mar 2021 10:24:29 +0200
Subject: JOL 0.15
In-Reply-To: <a627a221-82f4-660a-c506-8af863dfe3f0@redhat.com>
References: <a627a221-82f4-660a-c506-8af863dfe3f0@redhat.com>
Message-ID: <d793439b-8ba1-c689-09af-c115305c86ce@redhat.com>

On 3/31/21 10:22 AM, Aleksey Shipilev wrote:
> JOL 0.14 is released

That is 0.15, of course.

-- 
Thanks,
-Aleksey


From duke at openjdk.java.net  Wed Mar 31 09:00:27 2021
From: duke at openjdk.java.net (duke)
Date: Wed, 31 Mar 2021 09:00:27 GMT
Subject: git: openjdk/jol: 2 new changesets
Message-ID: <bdf1a148-5b41-41db-bcb7-b02e85a92b5c@openjdk.java.net>

Changeset: e4fe57da
Author:    Aleksey Shipilev <shade at redhat.com>
Date:      2021-03-31 08:03:02 +0000
URL:       https://git.openjdk.java.net/jol/commit/e4fe57da

JOL v0.15.

! jol-benchmarks/pom.xml
! jol-cli/pom.xml
! jol-core/pom.xml
! jol-samples/pom.xml
! pom.xml

Changeset: d48aa917
Author:    Aleksey Shipilev <shade at redhat.com>
Date:      2021-03-31 08:03:19 +0000
URL:       https://git.openjdk.java.net/jol/commit/d48aa917

Continue in 0.16-SNAPSHOT

! jol-benchmarks/pom.xml
! jol-cli/pom.xml
! jol-core/pom.xml
! jol-samples/pom.xml
! pom.xml