[jdk17u-dev] RFR: 8319876: Reduce memory consumption of VM_ThreadDump::doit

[Elif Aslan]

On Wed, 26 Nov 2025 14:50:43 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

>> /Approval request. This pull request contains a backport of commit [8ec6b8de3bb3d7aeebdcb45d761b18cce3bab75e](https://github.com/openjdk/jdk/commit/8ec6b8de3bb3d7aeebdcb45d761b18cce3bab75e) from the openjdk/jdk repository to JDK 17.
>> 
>> This backport significantly reduces RSS memory usage during ThreadMXBean.dumpAllThreads(boolean, boolean) execution.
>> 
>> This is not a clean backport due to differences between JDK 17 and upstream:
>> 
>> Threading Context: Changed ResourceMark rm(VMThread::vm_thread()) to ResourceMark rm;
>> • Similar to https://github.com/openjdk/jdk21u-dev/pull/307
>> 
>> Minor conflict resolved: _threads = nullptr; → _threads = NULL; to match JDK 17 conventions
>> 
>> Ran tier 2 tests as recommended in addition to GHA tested additionally ran tier1 tests on my local mac and passed.
>
> Hi @elifaslan1 
> I removed the label. No fix request comment supplied.

Hi @GoeLin, 
What should I do to associate this PR to the JBS bug? Thanks

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PR Comment: https://git.openjdk.org/jdk17u-dev/pull/4006#issuecomment-3582507624