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 <unistd.h> 6 7 void *Thread1(void *x) { 8 int *p = (int*)x; 9 p[0] = 1; 10 return NULL; 11 } 12 13 void *Thread2(void *x) { 14 sleep(1); 15 char *p = (char*)x; 16 p[2] = 1; 17 return NULL; 18 } 19 20 int main() { 21 int *data = new int(42); 22 fprintf(stderr, "ptr1=%p\n", data); 23 fprintf(stderr, "ptr2=%p\n", (char*)data + 2); 24 pthread_t t[2]; 25 pthread_create(&t[0], NULL, Thread1, data); 26 pthread_create(&t[1], NULL, Thread2, data); 27 pthread_join(t[0], NULL); 28 pthread_join(t[1], NULL); 29 delete data; 30 } 31 32 // CHECK: ptr1=[[PTR1:0x[0-9,a-f]+]] 33 // CHECK: ptr2=[[PTR2:0x[0-9,a-f]+]] 34 // CHECK: WARNING: ThreadSanitizer: data race 35 // CHECK: Write of size 1 at [[PTR2]] by thread T2: 36 // CHECK: Previous write of size 4 at [[PTR1]] by thread T1: 37
