RFR: 8260262: Use common code in function unmap_shared() in perfMemory_posix.cpp

Thomas Stuefe stuefe at openjdk.java.net
Mon Aug 9 08:10:34 UTC 2021

On Wed, 4 Aug 2021 17:15:46 GMT, Harold Seigel <hseigel at openjdk.org> wrote:

> Please review this change to use common code in function unmap_shared() in perfMemory_posix.cpp, to fix JDK-8260262.  The change calls munmap() directly to deallocate the memory because functions mmap_create_shared() and mmap_attach_shared() call mmap() directly to allocate the memory.
> The change was tested by running Mach5 tiers 1-2 on Linux, MacOS, and Windows, and Mach5 tiers 3-5 on Linux x64 and MacOS x64.
> Note that testing on AIX is needed.
> Thanks, Harold

Hi Harold,

thank you for doing this. The patch looks fine to me.

About AIX testing, SAP started to withdraw from AIX development and IBM will take a bigger role in the long run. One of the effects of that decision is that we gave up our AIX CI for OpenJDK head. I still can build and test manually if necessary, but let's first see if IBM has their AIX test systems up yet. 

@tellison, could you guys test this or should I do this?

Thank you!


Marked as reviewed by stuefe (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/4995

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