[llvm-dev] Non-determinism in libFuzzer tests on AArch64

[Diana Picus via llvm-dev]

Hi,

I've seen this issue pop up on the mailing list a couple of times
before with no resolution [1][2][3].

It has been getting really bad for our AArch64 buildbots lately. You
can see a few examples at the end of my email [4], but we have the
same failures on a couple of other bots as well.

Does anyone have any idea how to reproduce / investigate these issues?
If not, is it reasonable to mark the tests as unsupported on AArch64?

Thanks,
Diana

[1] https://lists.llvm.org/pipermail/llvm-dev/2018-June/124334.html
[2] http://lists.llvm.org/pipermail/llvm-dev/2019-January/128861.html
[3] https://lists.llvm.org/pipermail/llvm-dev/2018-November/127701.html
[4] clang-cmake-aarch64-lld failures:
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6264
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6262
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6260
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6255
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6253
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6250
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6247
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6245
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6237
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6235
http://lab.llvm.org:8011/builders/clang-cmake-aarch64-lld/builds/6229