RFR: JDK-8305414: gtest/NMTGtests.java is failing various sub-tests [v5]

[Thomas Stuefe]

On Wed, 5 Apr 2023 05:27:12 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> [JDK-8304815](https://bugs.openjdk.org/browse/JDK-8304815) added the ability to use NMT for better hs-err reporting: we now ask NMT - if enabled - to make sense of otherwise unknown memory locations.
>> 
>> With C-heap blocks, the error printer now prints out a message if a memory location points into a live or dead malloc block. For details, see JDK-8304815 and the comments in mallocTracker.cpp.
>> 
>> The change came with its own gtest, which promptly started to fail intermittently. That failure was caused by a real issue the test found where we accidentally returned from MallocTracker::print_pointer_information() if we encountered unmapped memory (this makes the error intermittent). The return bypassed the block printing code, which made the test fail.
>> 
>> Patch fixes that, and also fixes some debug output in the test.
>> 
>> Tests: Ran the test manually on Linux aarch64; was able to reproduce the errors without patch, no errors with patch.
>
> Thomas Stuefe has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:
> 
>  - Merge branch 'openjdk:master' into JDK-8305414-gtest-NMTGtests.java-is-failing-various-sub-tests
>  - Merge branch 'master' into JDK-8305414-gtest-NMTGtests.java-is-failing-various-sub-tests
>  - Revert problemlisting
>  - Merge branch 'master' into JDK-8305414-gtest-NMTGtests.java-is-failing-various-sub-tests
>  - Merge branch 'master' into JDK-8305414-gtest-NMTGtests.java-is-failing-various-sub-tests
>  - JDK-8305414-gtest-NMTGtests.java-is-failing-various-sub-tests

Pinging @jdksjolen ...

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PR Comment: https://git.openjdk.org/jdk/pull/13296#issuecomment-1497015936