1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include <pthread.h> 3 #include <stdio.h> 4 #include <unistd.h> 5 6 int Global; 7 pthread_mutex_t mtx1; 8 pthread_spinlock_t mtx2; 9 pthread_rwlock_t mtx3; 10 11 void *Thread1(void *x) { 12 sleep(1); 13 pthread_mutex_lock(&mtx1); 14 Global++; 15 pthread_mutex_unlock(&mtx1); 16 return NULL; 17 } 18 19 void *Thread2(void *x) { 20 pthread_mutex_lock(&mtx1); 21 pthread_mutex_unlock(&mtx1); 22 pthread_spin_lock(&mtx2); 23 pthread_rwlock_rdlock(&mtx3); 24 Global--; 25 pthread_spin_unlock(&mtx2); 26 pthread_rwlock_unlock(&mtx3); 27 return NULL; 28 } 29 30 int main() { 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_spin_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_spin_destroy(&mtx2); 52 pthread_rwlock_destroy(&mtx3); 53 } 54
