8282200: ShouldNotReachHere() reached by AsyncGetCallTrace after JDK-8280422

[parttimenerd]

Fixes the mentioned bug by replacing the check in AsyncGetCallTrace using the newly introduced method JavaThread::thread_from_jni_environment.

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Progress

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Issue

• JDK-8282200: ShouldNotReachHere() reached by AsyncGetCallTrace after JDK-8280422

Reviewers

• David Holmes (@dholmes-ora - Reviewer)
• Martin Doerr (@TheRealMDoerr - Reviewer)
• Kevin Walls (@kevinjwalls - Committer)

Reviewing

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Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/7559/head:pull/7559
$ git checkout pull/7559

Update a local copy of the PR:
$ git checkout pull/7559
$ git pull https://git.openjdk.java.net/jdk pull/7559/head

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Checkout this PR locally:
$ git pr checkout 7559

View PR using the GUI difftool:
$ git pr show -t 7559

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/7559.diff

[bridgekeeper]

👋 Welcome back parttimenerd! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

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[mlbridge]

Webrevs

• 03: Full - Incremental (b5bd5f6e)
• 02: Full - Incremental (ca295d34)
• 01: Full - Incremental (9f701eb0)
• 00: Full (8364d4b0)

[parttimenerd]

Related to #7193

[dholmes-ora]

I marking this as changes requested because I need to investigate further. A shouldNotReachHere should never be reached, if it can be reached then the circumstances need investigated to see where the true problem lies.

Thanks,
David

[parttimenerd]

I'm willing to help...

The described error is not dependent on the JVM being a debug build, I can also reproduce it with a release build by decreasing the sampling interval.

[dholmes-ora]

Please see updates to JBS issue and the draft PR here:
#7566

You can either take my changes, or hand over to me and I will use my PR.

Thanks.

[parttimenerd]

To be frank, I would like to integrate your changes into my, because I need a second PR for JDK to be able to write such issues in JBS on my own.

To the PR itself: The main difference between both is that with my PR we say "this should not happen please check before if you really want this" and with your PR we don't. I liked your initial PR that threw an error for the normal case that we cannot call this method for a thread in an inconsistent state. As you stated in the comment in the method of your PR, it is only a special case for AsyncGetCallTrace.

What is the down side of having to explicitly check for this special case when you need it and otherwise throw an error?

[dholmes-ora]

I don't like unnecessary special-cases. I added the ShouldNotReachHere() due to flawed reasoning, so would like to remove it again and make the code look the way it would have if I had realized about AGCT at the time. Creating a new API just for AGCT to use is not necessary IMO.

Cheers.

[parttimenerd]

Good to know. I will change my PR accordingly (if this ok for you) :)

[dholmes-ora]

Please do update. Thanks.

[parttimenerd]

I've updated it. Thanks again.

[parttimenerd]

I ran my original tests and found no crashes.

[dholmes-ora]

Hi Johannes,

Your original changes need removing again.

Thanks,
David

[dholmes-ora]

Looks good to me (but I am biased :) )!

Thanks,
David

[openjdk]

@parttimenerd This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8282200: ShouldNotReachHere() reached by AsyncGetCallTrace after JDK-8280422

Reviewed-by: dholmes, mdoerr, kevinw

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 37 new commits pushed to the master branch:

• f4486a1: 8262400: runtime/exceptionMsgs/AbstractMethodError/AbstractMethodErrorTest.java fails in test_ame5_compiled_vtable_stub with wrapper
• 3cfffa4: 8282188: Unused static field MathContext.DEFAULT_DIGITS
• 379fd85: 8277369: Strange behavior of JMenuBar with RIGHT_TO_LEFT orientation, arrow keys behaves opposite traversing through keyboard
• cd3e59e: 8282299: Remove unused PartialArrayScanTask default constructor
• a661003: 8281614: serviceability/sa/ClhsdbFindPC.java fails with java.lang.RuntimeException: 'In code in NMethod for jdk/test/lib/apps/LingeredApp.steadyState' missing from stdout/stderr
• 43dc9ef: 8281988: Create a regression test for JDK-4618767
• 253cf78: 8282076: Merge some debug agent changes from the loom repo
• f86f38a: 8280901: MethodHandle::linkToNative stub is missing w/ -Xint
• e540e0a: 8282296: (se) Pipe.open() creates a Pipe implementation that uses Unix domain sockets (win)
• 7dc7184: 8282309: Operation before upper case conversion
• ... and 27 more: https://git.openjdk.java.net/jdk/compare/cc7cf81256ed4d74493472017b1c4df20fa2208a...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@dholmes-ora, @TheRealMDoerr, @kevinjwalls) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[TheRealMDoerr]

LGTM.

[parttimenerd]

/integrate

[openjdk]

@parttimenerd
Your change (at version b5bd5f6) is now ready to be sponsored by a Committer.

[TheRealMDoerr]

/sponsor

[openjdk]

Going to push as commit 231e48f.
Since your change was applied there have been 37 commits pushed to the master branch:

• f4486a1: 8262400: runtime/exceptionMsgs/AbstractMethodError/AbstractMethodErrorTest.java fails in test_ame5_compiled_vtable_stub with wrapper
• 3cfffa4: 8282188: Unused static field MathContext.DEFAULT_DIGITS
• 379fd85: 8277369: Strange behavior of JMenuBar with RIGHT_TO_LEFT orientation, arrow keys behaves opposite traversing through keyboard
• cd3e59e: 8282299: Remove unused PartialArrayScanTask default constructor
• a661003: 8281614: serviceability/sa/ClhsdbFindPC.java fails with java.lang.RuntimeException: 'In code in NMethod for jdk/test/lib/apps/LingeredApp.steadyState' missing from stdout/stderr
• 43dc9ef: 8281988: Create a regression test for JDK-4618767
• 253cf78: 8282076: Merge some debug agent changes from the loom repo
• f86f38a: 8280901: MethodHandle::linkToNative stub is missing w/ -Xint
• e540e0a: 8282296: (se) Pipe.open() creates a Pipe implementation that uses Unix domain sockets (win)
• 7dc7184: 8282309: Operation before upper case conversion
• ... and 27 more: https://git.openjdk.java.net/jdk/compare/cc7cf81256ed4d74493472017b1c4df20fa2208a...master

Your commit was automatically rebased without conflicts.

[openjdk]

@TheRealMDoerr @parttimenerd Pushed as commit 231e48f.

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