1// RUN: %clangxx_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s 2#include <pthread.h> 3#include <stddef.h> 4#include <stdio.h> 5#include <string.h> 6#include <unistd.h> 7 8char *data = new char[10]; 9char *data1 = new char[10]; 10char *data2 = new char[10]; 11 12void *Thread1(void *x) { 13 static volatile int size = 1; 14 memcpy(data+5, data1, size); 15 return NULL; 16} 17 18void *Thread2(void *x) { 19 static volatile int size = 4; 20 sleep(1); 21 memcpy(data+3, data2, size); 22 return NULL; 23} 24 25int 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