nested signal handling

[ramosian-glider]

Originally reported on Google Code with ID 71

The reproducer is supplied offline. Nested signals are not handled in the reproducer.

Reported by dvyukov@google.com on 2014-08-06 07:37:22

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- _Attachment: [nested_signals.cpp](https://storage.googleapis.com/google-code-attachments/thread-sanitizer/issue-71/comment-0/nested_signals.cpp)_

[ramosian-glider]

Also please note magic sleeps placed in both threads! Without them signals sent from
main thread are lost.

Reported by igor@ikseek.com on 2014-08-09 16:07:42

[ramosian-glider]

Commit 216903
http://llvm.org/viewvc/llvm-project?view=revision&revision=216903
allows recursive interceptors.

I will also try to eliminate the need in sleep(1) in main.

The sleep in BusyThread still will be required. But it does not need to be a sleep,
it can be any function intercepted by tsan (e.g. malloc or free), so I would expect
it to not be a problem.

Reported by dvyukov@google.com on 2014-09-02 12:39:26

[ramosian-glider]

Awesome, thanks!

Reported by igor@unity3d.com on 2014-09-03 09:51:26

[ramosian-glider]

I've submitted
http://llvm.org/viewvc/llvm-project?view=revision&revision=217031
which should eliminate the need in sleep in the main thread.

Igor, I hope that this part of tasn now works for you.
If you have any other issues with tsan, feel free to file bug reports.

Reported by dvyukov@google.com on 2014-09-03 12:36:36

• Status changed: Fixed

[ramosian-glider]

Adding Project:ThreadSanitizer as part of GitHub migration.

Reported by glider@google.com on 2015-07-30 09:21:32

• Labels added: ProjectThreadSanitizer