[all-commits] [llvm/llvm-project] ac38ab: [lsan] Use VReport if not REGISTERS_AVAILABLE (#11...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ac38ab594f1b7c9a9f67007f7684e4d46b2588be
      https://github.com/llvm/llvm-project/commit/ac38ab594f1b7c9a9f67007f7684e4d46b2588be
  Author: Fangrui Song <i at maskray.me>
  Date:   2024-11-20 (Wed, 20 Nov 2024)

  Changed paths:
    M compiler-rt/lib/lsan/lsan_common.cpp

  Log Message:
  -----------
  [lsan] Use VReport if not REGISTERS_AVAILABLE (#116555)

Certain tests (many are from lld/test) run `... '2>&1 | count 0` to
ensure that there is no stderr message.

GetRegistersAndSP may rarely fail, leading to
a spurious failure like (with a local hack to make `count` dump the
input):

```
+ /home/ray/llvm/out/asan/bin/ld.lld func1-gcs.o func2-gcs.o func3-gcs.o -o /dev/null -z gcs-report=warning -z gcs=never
+ /home/ray/llvm/out/asan/bin/count 0
Expected 0 lines, got 1.
==2403039==Unable to get registers from thread 2403018.
```

The failure can reliably be reproduced by running `ninja check-lld` a
few times under asan+lsan (see the bot
sanitizer-x86_64-linux-bootstrap-asan).



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