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| author | Nazım Can Altınova <canaltinova@gmail.com> | 2024-03-26 12:32:52 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-03-26 12:32:52 +0100 |
| commit | f01377d8ebcb1f52fe75a236cdf34f1b8b1e99fb (patch) | |
| tree | cc2d7fe3d9e61f63c5181c1d05e9976719f839c1 /clang/lib/CodeGen/CodeGenModule.cpp | |
| parent | 5b544b511c7133fcb26a5c563b746a4baefb38d6 (diff) | |
| download | llvm-f01377d8ebcb1f52fe75a236cdf34f1b8b1e99fb.zip llvm-f01377d8ebcb1f52fe75a236cdf34f1b8b1e99fb.tar.gz llvm-f01377d8ebcb1f52fe75a236cdf34f1b8b1e99fb.tar.bz2 | |
[tsan] Mark `pthread_*_lock` functions as blocking (#84162)
Fixes #83561.
When a thread is blocked on a mutex and we send an async signal to that
mutex, it never arrives because tsan thinks that `pthread_mutex_lock` is
not a blocking function. This patch marks `pthread_*_lock` functions as
blocking so we can successfully deliver async signals like `SIGPROF`
when the thread is blocked on them.
See the issue also for more details. I also added a test, which is a
simplified version of the compiler explorer example I posted in the
issue.
Please let me know if you have any other ideas or things to improve!
Happy to work on them.
Also I filed #83844 which is more tricky because we don't have a libc
wrapper for `SYS_futex`. I'm not sure how to intercept this yet. Please
let me know if you have ideas on that as well. Thanks!
Diffstat (limited to 'clang/lib/CodeGen/CodeGenModule.cpp')
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