[all-commits] [llvm/llvm-project] 0365cc: [HWASAN][LSAN] Fix false positive memory leak repo...

[kstoimenov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0365ccd2a1b3900491eef30b784f2ea13a4d073c
      https://github.com/llvm/llvm-project/commit/0365ccd2a1b3900491eef30b784f2ea13a4d073c
  Author: Kirill Stoimenov <kstoimenov at google.com>
  Date:   2023-07-18 (Tue, 18 Jul 2023)

  Changed paths:
    M compiler-rt/lib/lsan/lsan_common.cpp
    A compiler-rt/test/lsan/TestCases/user_pointer.cpp

  Log Message:
  -----------
  [HWASAN][LSAN] Fix false positive memory leak reports on X86_64

Before this patch when running HWASAN on x86_64 with with memory tagging support we got a bunch of false memory leak reports. The reason for that is that the heuristic used to detect if an 8 bytes could be a user pointer was not valid when memory tagging is used as the top byte could contain non-zero information.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D155338