| // RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s |
| #include "custom_mutex.h" |
| |
| // Test that failed TryLock does not induce parasitic synchronization. |
| |
| Mutex mu(true, 0); |
| long data; |
| |
| void *thr(void *arg) { |
| mu.Lock(); |
| data++; |
| mu.Unlock(); |
| mu.Lock(); |
| barrier_wait(&barrier); |
| barrier_wait(&barrier); |
| mu.Unlock(); |
| return 0; |
| } |
| |
| int main() { |
| barrier_init(&barrier, 2); |
| pthread_t th; |
| pthread_create(&th, 0, thr, 0); |
| barrier_wait(&barrier); |
| if (mu.TryLock()) { |
| fprintf(stderr, "TryLock succeeded, should not\n"); |
| exit(0); |
| } |
| data++; |
| barrier_wait(&barrier); |
| pthread_join(th, 0); |
| fprintf(stderr, "DONE\n"); |
| return 0; |
| } |
| |
| // CHECK: ThreadSanitizer: data race |
| // CHECK-NEXT: Write of size 8 at {{.*}} by main thread: |
| // CHECK-NEXT: #0 main {{.*}}custom_mutex1.cpp:29 |
| // CHECK: DONE |