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| // RUN: %clangxx_tsan -O1 --std=c++11 %s -o %t
// RUN: %env_tsan_opts=report_destroy_locked=0 %run %t 2>&1 | FileCheck %s
#include "custom_mutex.h"
// Regression test for a bug.
// Thr1 destroys a locked mutex, previously such mutex was not removed from
// sync map and as the result subsequent uses of a mutex located at the same
// address caused false race reports.
Mutex mu(false, __tsan_mutex_write_reentrant);
long data;
void *thr1(void *arg) {
mu.Lock();
mu.~Mutex();
new(&mu) Mutex(true, __tsan_mutex_write_reentrant);
return 0;
}
void *thr2(void *arg) {
barrier_wait(&barrier);
mu.Lock();
data++;
mu.Unlock();
return 0;
}
int main() {
barrier_init(&barrier, 2);
pthread_t th;
pthread_create(&th, 0, thr1, 0);
pthread_join(th, 0);
barrier_init(&barrier, 2);
pthread_create(&th, 0, thr2, 0);
mu.Lock();
data++;
mu.Unlock();
barrier_wait(&barrier);
pthread_join(th, 0);
fprintf(stderr, "DONE\n");
return 0;
}
// CHECK-NOT: WARNING: ThreadSanitizer: data race
// CHECK: DONE
|