[compiler-rt] [llvm] [tsan] Introduce Adaptive Delay Scheduling to TSAN (PR #178836)

[Chris Cotter via llvm-commits]

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@@ -1371,20 +1383,23 @@ INTERCEPTOR(int, pthread_cond_signal, void *c) {
   void *cond = init_cond(c);
   SCOPED_TSAN_INTERCEPTOR(pthread_cond_signal, cond);
   MemoryAccessRange(thr, pc, (uptr)c, sizeof(uptr), false);
+  GetFuzzingScheduler().MutexCvOp();
   return REAL(pthread_cond_signal)(cond);
 }
 
 INTERCEPTOR(int, pthread_cond_broadcast, void *c) {
   void *cond = init_cond(c);
   SCOPED_TSAN_INTERCEPTOR(pthread_cond_broadcast, cond);
   MemoryAccessRange(thr, pc, (uptr)c, sizeof(uptr), false);
+  GetFuzzingScheduler().MutexCvOp();
   return REAL(pthread_cond_broadcast)(cond);
 }
 
 INTERCEPTOR(int, pthread_cond_destroy, void *c) {
   void *cond = init_cond(c);
   SCOPED_TSAN_INTERCEPTOR(pthread_cond_destroy, cond);
   MemoryAccessRange(thr, pc, (uptr)c, sizeof(uptr), true);
+  GetFuzzingScheduler().MutexCvOp();
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ccotter wrote:

My thinking was to help catch races where another thread attempts to use a cv after it's been destroyed. But, thinking about it more, I do not think this delay helps, since it's the *other* thread that needs to be delayed, not the thread doing the destroy. I will remove this one.

https://github.com/llvm/llvm-project/pull/178836