[PATCH] D138986: [AIX][BigArchive] Treat the archive is empty if the first child member offset is zero

Mon Dec 19 10:15:36 PST 2022

hctim added a comment.

Looks like this broke the ASan buildbot: https://lab.llvm.org/buildbot/#/builders/5/builds/30103

  -- Testing: 70627 tests, 80 workers --
  Testing:  0.. 10.. 20.. 30.. 40.. 50.. 60.. 
  FAIL: LLVM :: Object/archive-big-malformed-first-member.test (50724 of 70627)
  ******************** TEST 'LLVM :: Object/archive-big-malformed-first-member.test' FAILED ********************
  Script:
  --
  : 'RUN: at line 2';   echo    "<bigaf>" > /b/sanitizer-x86_64-linux-fast/build/llvm_build_asan/test/Object/Output/archive-big-malformed-first-member.test.tmp.a
  : 'RUN: at line 3';   echo -n "0                   0                   0                   128                 0                   0                   " >> /b/sanitizer-x86_64-linux-fast/build/llvm_build_asan/test/Object/Output/archive-big-malformed-first-member.test.tmp.a
  : 'RUN: at line 4';   not /b/sanitizer-x86_64-linux-fast/build/llvm_build_asan/bin/llvm-ar tv /b/sanitizer-x86_64-linux-fast/build/llvm_build_asan/test/Object/Output/archive-big-malformed-first-member.test.tmp.a 2>&1 | grep 'truncated or malformed archive'
  --
  Exit Code: 1

I'm guessing that the `2>&1 | grep` in the test runline is supporessing an ASan report.

You can reproduce the sanitizer buildbots using our bot scripts here <https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild>, but this error looks reasonable easy to reproduce with a cmake containing `-DLLVM_USE_SANITIZER=Address`.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D138986/new/

https://reviews.llvm.org/D138986