[PATCH] D20913: [asan] add primitives that allow coroutine implementations

[Dmitry Vyukov via llvm-commits]

dvyukov added a comment.

> @dvyokov I tried the signal triggering stuff with setitimer, but the resolution (on my machine at least) seems to low. The signal triggers 0 to 1 time, never close to critical parts. I even tried letting it run for 5min with a while (true) of the test, it didn't trigger any bad behavior.


Instead, I tried adding calls to ThrowAndCatch() in between the lines of StartEnterFiber() and the others functions directly in the library (of course I can't commit that), and I found a few bugs with that, not fixed yet.
My point is that using setitimer to trigger these bugs seems useless, do you still want me to do it? I have no other solution to unit-test that though...

Absolutely.
My OS is well able to trigger signal every 100us per core. We also have a bunch of test bots that run these tests continuously. Even if this test will find an issue after 100 runs, it's still very useful. Debugging such issue in production is costly.


http://reviews.llvm.org/D20913