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_mutex_t mtx2; 9 10 void *Thread1(void *x) { 11 pthread_mutex_lock(&mtx1); 12 pthread_mutex_lock(&mtx2); 13 Global++; 14 pthread_mutex_unlock(&mtx2); 15 pthread_mutex_unlock(&mtx1); 16 return NULL; 17 } 18 19 void *Thread2(void *x) { 20 sleep(1); 21 Global--; 22 return NULL; 23 } 24 25 int main() { 26 // CHECK: WARNING: ThreadSanitizer: data race 27 // CHECK: Write of size 4 at {{.*}} by thread T2: 28 // CHECK: Previous write of size 4 at {{.*}} by thread T1 29 // CHECK: (mutexes: write [[M1:M[0-9]+]], write [[M2:M[0-9]+]]): 30 // CHECK: Mutex [[M1]] (0x{{.*}}) created at: 31 // CHECK: #0 pthread_mutex_init 32 // CHECK: #1 main {{.*}}/mutexset4.cc:[[@LINE+4]] 33 // CHECK: Mutex [[M2]] (0x{{.*}}) created at: 34 // CHECK: #0 pthread_mutex_init 35 // CHECK: #1 main {{.*}}/mutexset4.cc:[[@LINE+2]] 36 pthread_mutex_init(&mtx1, 0); 37 pthread_mutex_init(&mtx2, 0); 38 pthread_t t[2]; 39 pthread_create(&t[0], NULL, Thread1, NULL); 40 pthread_create(&t[1], NULL, Thread2, NULL); 41 pthread_join(t[0], NULL); 42 pthread_join(t[1], NULL); 43 pthread_mutex_destroy(&mtx1); 44 pthread_mutex_destroy(&mtx2); 45 } 46
