[webkit-changes] [WebKit/WebKit] 0d4acd: Fix undefined behavior in pas_bitvector.h's PAS_BI...

[Chris Dumez]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 0d4acd6a56aa2244c83c28d541ed531cdd540940
      https://github.com/WebKit/WebKit/commit/0d4acd6a56aa2244c83c28d541ed531cdd540940
  Author: Chris Dumez <cdumez at apple.com>
  Date:   2023-03-16 (Thu, 16 Mar 2023)

  Changed paths:
    M Source/bmalloc/libpas/src/libpas/pas_bitvector.h

  Log Message:
  -----------
  Fix undefined behavior in pas_bitvector.h's PAS_BITVECTOR_BIT_MASK()
https://bugs.webkit.org/show_bug.cgi?id=254035

Reviewed by Yusuke Suzuki.

Fix undefined behavior in pas_bitvector.h's PAS_BITVECTOR_BIT_MASK():
/Volumes/Work/WebKit/OpenSource/Source/bmalloc/libpas/src/libpas/pas_bitvector.h:97:24: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior

This was found by UBSan.

* Source/bmalloc/libpas/src/libpas/pas_bitvector.h:

Canonical link: https://commits.webkit.org/261764@main