[all-commits] [llvm/llvm-project] 77f5a3: [Bitstream] Temporarily disable UBSan for invalid ...

[Andrew Browne via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 77f5a3fbba7a5405085553d14df1aac174235dfc
      https://github.com/llvm/llvm-project/commit/77f5a3fbba7a5405085553d14df1aac174235dfc
  Author: Andrew Browne <browneee at google.com>
  Date:   2022-02-07 (Mon, 07 Feb 2022)

  Changed paths:
    A llvm/test/Bitcode/invalid-no-ubsan.test
    M llvm/test/Bitcode/invalid.test

  Log Message:
  -----------
  [Bitstream] Temporarily disable UBSan for invalid bitcode tests. This fixes failing sanitizer buildbots.

Tests added by
  https://github.com/llvm/llvm-project/commit/3c86642edd28f1ce970882edaba8dce468ec7401
  https://github.com/llvm/llvm-project/commit/f4fca0fbb052e55935b483c8955c440b59511ce8
cause existing code to exhibit UB:
  https://github.com/llvm/llvm-project/blob/b4c6d1bb379192cb5b712fda9f60cd105f21194f/llvm/include/llvm/Bitstream/BitstreamReader.h#L244

llvm/include/llvm/Bitstream/BitstreamReader.h:244:51:
runtime error: shift exponent 35 is too large for 32-bit type 'unsigned int'

Hitting the UBSan error before the expected error causes the test to fail under UBSan:

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D119182