[llvm-dev] libFuzzer signal handling tests

Kostya Serebryany via llvm-dev llvm-dev at lists.llvm.org
Wed Jun 27 16:17:58 PDT 2018

+Matt Morehouse <mascasa at google.com>

On Wed, Jun 27, 2018 at 4:14 PM George Karpenkov <ekarpenkov at apple.com>

> Hi,
> Now that we include libFuzzer tests into check-all we might want to take
> another look at flaky ones.
> For us, sigusr.test and merge-sigusr.test tend to fail every now and then.
> Those tests send a signal to a fuzzing target which sleeps for 1 second on
> every invocation,
> and check that the signal is processed and sigaction callback runs within
> 2 seconds.
> In my understanding there’s no guarantee that the signal would be handled
> within 2 seconds.
> I’m marking them as unsupported on Darwin,
> but I’m surprised that there aren’t similar issues on Linux.
> Could they be rewritten in a more stable way [I’m really not sure how] or
> removed altogether?
> George
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