RFR: 8370254: Add VM_MEMORY_JAVA mmap tag to MacOS mmap calls [v6]

Wed Nov 5 05:09:16 UTC 2025

On Tue, 4 Nov 2025 19:07:32 GMT, Nityanand Rai <duke at openjdk.org> wrote:

>> Add VM_MEMORY_JAVA tag to mmap calls in os_bsd.cpp for better memory tracking of java process on macOs
>
> Nityanand Rai has updated the pull request incrementally with one additional commit since the last revision:
> 
>   minor refactoring to reduce code duplication

Changes requested by jsjolen (Reviewer).

test/hotspot/gtest/runtime/test_os.cpp line 744:

> 742:     EXPECT_TRUE(GtestUtils::is_memory_tagged_as_java(p, 1 * M))
> 743:       << "JVM memory allocated via os::reserve_memory should be tagged with VM_MEMORY_JAVA on macOS";
> 744: #endif

Move all of these snippets into one separate test

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PR Review: https://git.openjdk.org/jdk/pull/27868#pullrequestreview-3419863275
PR Review Comment: https://git.openjdk.org/jdk/pull/27868#discussion_r2492971686