1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include "test.h" 3 4 int Global; 5 pthread_mutex_t mtx1; 6 pthread_mutex_t mtx2; 7 pthread_rwlock_t mtx3; 8 9 void *Thread1(void *x) { 10 barrier_wait(&barrier); 11 pthread_mutex_lock(&mtx1); 12 Global++; 13 pthread_mutex_unlock(&mtx1); 14 return NULL; 15 } 16 17 void *Thread2(void *x) { 18 pthread_mutex_lock(&mtx1); 19 pthread_mutex_unlock(&mtx1); 20 pthread_mutex_lock(&mtx2); 21 pthread_rwlock_rdlock(&mtx3); 22 Global--; 23 pthread_mutex_unlock(&mtx2); 24 pthread_rwlock_unlock(&mtx3); 25 barrier_wait(&barrier); 26 return NULL; 27 } 28 29 int main() { 30 barrier_init(&barrier, 2); 31 // CHECK: WARNING: ThreadSanitizer: data race 32 // CHECK: Write of size 4 at {{.*}} by thread T1 33 // CHECK: (mutexes: write [[M1:M[0-9]+]]): 34 // CHECK: Previous write of size 4 at {{.*}} by thread T2 35 // CHECK: (mutexes: write [[M2:M[0-9]+]], read [[M3:M[0-9]+]]): 36 // CHECK: Mutex [[M1]] (0x{{.*}}) created at: 37 // CHECK: #1 main {{.*}}mutexset6.cc:[[@LINE+5]] 38 // CHECK: Mutex [[M2]] (0x{{.*}}) created at: 39 // CHECK: #1 main {{.*}}mutexset6.cc:[[@LINE+4]] 40 // CHECK: Mutex [[M3]] (0x{{.*}}) created at: 41 // CHECK: #1 main {{.*}}mutexset6.cc:[[@LINE+3]] 42 pthread_mutex_init(&mtx1, 0); 43 pthread_mutex_init(&mtx2, 0); 44 pthread_rwlock_init(&mtx3, 0); 45 pthread_t t[2]; 46 pthread_create(&t[0], NULL, Thread1, NULL); 47 pthread_create(&t[1], NULL, Thread2, NULL); 48 pthread_join(t[0], NULL); 49 pthread_join(t[1], NULL); 50 pthread_mutex_destroy(&mtx1); 51 pthread_mutex_destroy(&mtx2); 52 pthread_rwlock_destroy(&mtx3); 53 } 54
