1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s 2 #include <pthread.h> 3 #include <stddef.h> 4 #include <stdio.h> 5 #include <string.h> 6 #include <unistd.h> 7 8 char *data = new char[10]; 9 char *data1 = new char[10]; 10 char *data2 = new char[10]; 11 12 void *Thread1(void *x) { 13 static volatile int size = 1; 14 memcpy(data+5, data1, size); 15 return NULL; 16 } 17 18 void *Thread2(void *x) { 19 static volatile int size = 4; 20 sleep(1); 21 memcpy(data+3, data2, size); 22 return NULL; 23 } 24 25 int main() { 26 fprintf(stderr, "addr=%p\n", &data[5]); 27 pthread_t t[2]; 28 pthread_create(&t[0], NULL, Thread1, NULL); 29 pthread_create(&t[1], NULL, Thread2, NULL); 30 pthread_join(t[0], NULL); 31 pthread_join(t[1], NULL); 32 return 0; 33 } 34 35 // CHECK: addr=[[ADDR:0x[0-9,a-f]+]] 36 // CHECK: WARNING: ThreadSanitizer: data race 37 // CHECK: Write of size 1 at [[ADDR]] by thread T2: 38 // CHECK: #0 memcpy 39 // CHECK: #1 Thread2 40 // CHECK: Previous write of size 1 at [[ADDR]] by thread T1: 41 // CHECK: #0 memcpy 42 // CHECK: #1 Thread1 43
