[all-commits] [llvm/llvm-project] 8a34f6: [ASAN] Do not consider alignment during object siz...

[Pavel Skripkin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8a34f6dba14e49332ff63abfa6a8aa3ca560fc50
      https://github.com/llvm/llvm-project/commit/8a34f6dba14e49332ff63abfa6a8aa3ca560fc50
  Author: Pavel Skripkin <paskripkin at gmail.com>
  Date:   2024-09-19 (Thu, 19 Sep 2024)

  Changed paths:
    M llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
    M llvm/test/Instrumentation/AddressSanitizer/instrument_global.ll

  Log Message:
  -----------
  [ASAN] Do not consider alignment during object size calculations (#109120)

It was found that ASAN logic optimizes away out-of-bound access
instrumentation for over-aligned arrays. See #108287 for complete code
examples.

Fix it by not considering alignment during object size calculation,
since out-of-bounds access for over-aligned object is still UB and
should be reported by ASAN.

Closes: #108287



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications