[jdk8u-dev] RFR: 8352942: jdk/jfr/startupargs/TestMemoryOptions.java fails with 32-bit build

[Paul Hohensee]

On Wed, 26 Mar 2025 08:53:12 GMT, KIRIYAMA Takuya <duke at openjdk.org> wrote:

> Hi All,
> I would like to add this bug fix for the bug in jdk/jfr/startupargs/TestMemoryOptions.java. This test contains 24 test cases and fails the "ThreadBufferSizeExceedMemorySize" case.
> The cause of this bug is the memory allocation issue, which occurs only on 32-bit Server VM, not on Client VM or 64-bit JDK. The failure happens because Server VM's default heap size reduces available memory space, causing JFR to fail memory allocation.
> To resolve this issue, -Xmx256M is explicitly set, matching the Client VM default heap size, ensuring sufficient memory space remains available for JFR.
> I believe that this test verifies that the combination of memory options for JFR is valid or invalid and that the MaxHeapSize setting does not affect the verification.
> Change has been verified locally, test-fix only, no risk.
> 
> Would someone please review this fix?

Yes, there is lack of enthusiasm for 32-bit ports, and the x86 32-bit port is in the process of being removed in JDK 25. But, the arm-32 port still exists in tip, and the LTS 32-bit ports are still supported.

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PR Comment: https://git.openjdk.org/jdk8u-dev/pull/641#issuecomment-2762143563