[webkit-changes] [WebKit/WebKit] b8999f: Gracefully handle guard-page mmap failures in OSAl...

[Marcus Plutowski]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: b8999f1cf051e935d8ec14b70f7191e88eb7791d
      https://github.com/WebKit/WebKit/commit/b8999f1cf051e935d8ec14b70f7191e88eb7791d
  Author: Marcus Plutowski <marcus_plutowski at apple.com>
  Date:   2024-09-04 (Wed, 04 Sep 2024)

  Changed paths:
    M Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp

  Log Message:
  -----------
  Gracefully handle guard-page mmap failures in OSAllocatorPOSIX
https://bugs.webkit.org/show_bug.cgi?id=279155
rdar://135306076

Reviewed by Yusuke Suzuki.

While it's unlikely that these mmap calls fail, it is still possible --
e.g. if the process hits the maximum number of allocations midway
through this call. This patch makes it so that we won't just ignore such
failures, and will instead clean up + tell the caller that their
allocation failed.

* Source/WTF/wtf/posix/OSAllocatorPOSIX.cpp:
(WTF::OSAllocator::tryReserveAndCommit):

Canonical link: https://commits.webkit.org/283195@main



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