1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include "test.h" 3 #include <string.h> 4 5 int x[4], z[4]; 6 7 void *MemCpyThread(void *a) { 8 memcpy((int*)a, z, 16); 9 barrier_wait(&barrier); 10 return NULL; 11 } 12 13 void *MemSetThread(void *a) { 14 barrier_wait(&barrier); 15 memset((int*)a, 0, 16); 16 return NULL; 17 } 18 19 int main() { 20 barrier_init(&barrier, 2); 21 pthread_t t[2]; 22 // Race on x between memcpy and memset 23 pthread_create(&t[0], NULL, MemCpyThread, x); 24 pthread_create(&t[1], NULL, MemSetThread, x); 25 pthread_join(t[0], NULL); 26 pthread_join(t[1], NULL); 27 printf("PASS\n"); 28 return 0; 29 } 30 31 // CHECK: WARNING: ThreadSanitizer: data race 32 // CHECK: #0 memset 33 // CHECK: #1 MemSetThread 34 // CHECK: Previous write 35 // CHECK: #0 memcpy 36 // CHECK: #1 MemCpyThread 37 38
