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[v24.x] deps: V8: cherry-pick ea9c016f26ad - #66570
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Original commit message:
AIX: Fix race condition in DecommitPages
The current implementation of DecommitPages could lead to a race
condition where another thread maps the same region of memory right after we unmap it.
This is currently causing test failures on Node.js:
nodejs#62647
As a workaround we avoid unmapping the address space and instead
mark the region as inaccessible using mprotect. We originally
considered using madvise to release physical memory, but it is a
no-op on AIX and was omitted from this implementation.
IT:105
Change-Id: I8271a562be2e7ebcb685a2dd3b7425a38bebe1c9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/8193436
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Milad Farazmand <mfarazma@ibm.com>
Reviewed-by: Milad Farazmand <mfarazma@ibm.com>
Cr-Commit-Position: refs/heads/main@{#109206}
Refs: v8/v8@ea9c016
Signed-off-by: Richard Lau <richard.lau@ibm.com>
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Original commit message:
Refs: v8/v8@ea9c016
Refs: #62647
This is a backport of the referenced upstream V8 commit. It is similar to, but slightly different, to the change that landed on
main/v26.xunder #61898 (that PR is semver-major but this particular change is not). (The difference is due tomadvisebeing a no-op on AIX so was dropped from the upstream V8 CL.)