1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include "test.h" 3 4 pthread_mutex_t Mtx; 5 int Global; 6 7 void *Thread2(void *x) { 8 barrier_wait(&barrier); 9 // CHECK: WARNING: ThreadSanitizer: data race 10 // CHECK-NEXT: Atomic read of size 1 at {{.*}} by thread T2: 11 // CHECK-NEXT: #0 pthread_mutex_lock 12 // CHECK-NEXT: #1 Thread2{{.*}} {{.*}}race_on_mutex.c:[[@LINE+1]]{{(:3)?}} ({{.*}}) 13 pthread_mutex_lock(&Mtx); 14 Global = 43; 15 pthread_mutex_unlock(&Mtx); 16 return NULL; 17 } 18 19 void *Thread1(void *x) { 20 // CHECK: Previous write of size {{[0-9]+}} at {{.*}} by thread T1: 21 // CHECK: #{{[0-9]+}} {{.*}}pthread_mutex_init {{.*}} ({{.*}}) 22 // CHECK-NEXT: #{{[0-9]+}} Thread1{{.*}} {{.*}}race_on_mutex.c:[[@LINE+1]]{{(:3)?}} ({{.*}}) 23 pthread_mutex_init(&Mtx, 0); 24 pthread_mutex_lock(&Mtx); 25 Global = 42; 26 pthread_mutex_unlock(&Mtx); 27 barrier_wait(&barrier); 28 return NULL; 29 } 30 31 int main() { 32 barrier_init(&barrier, 2); 33 pthread_t t[2]; 34 pthread_create(&t[0], NULL, Thread1, NULL); 35 pthread_create(&t[1], NULL, Thread2, NULL); 36 pthread_join(t[0], NULL); 37 pthread_join(t[1], NULL); 38 pthread_mutex_destroy(&Mtx); 39 return 0; 40 } 41
