mutexset8.cpp
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// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
#include "test.h"
int Global;
pthread_mutex_t *mtx;
void *Thread1(void *x) {
barrier_wait(&barrier);
pthread_mutex_lock(mtx);
Global++;
pthread_mutex_unlock(mtx);
return NULL;
}
void *Thread2(void *x) {
Global--;
barrier_wait(&barrier);
return NULL;
}
int main() {
barrier_init(&barrier, 2);
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 4 at {{.*}} by thread T1
// CHECK: (mutexes: write [[M1:M[0-9]+]]):
// CHECK: Previous write of size 4 at {{.*}} by thread T2:
// CHECK: Mutex [[M1]] (0x{{.*}}) created at:
// CHECK: #0 pthread_mutex_init
// CHECK: #1 main {{.*}}mutexset8.cpp
mtx = new pthread_mutex_t;
pthread_mutex_init(mtx, 0);
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
pthread_mutex_destroy(mtx);
delete mtx;
}