1 #include <pthread.h> 2 #include <stddef.h> 3 #include <stdio.h> 4 #include <unistd.h> 5 6 void *Thread1(void *x) { 7 int *p = (int*)x; 8 p[0] = 1; 9 return NULL; 10 } 11 12 void *Thread2(void *x) { 13 usleep(500*1000); 14 char *p = (char*)x; 15 p[2] = 1; 16 return NULL; 17 } 18 19 int main() { 20 int *data = new int(42); 21 fprintf(stderr, "ptr1=%p\n", data); 22 fprintf(stderr, "ptr2=%p\n", (char*)data + 2); 23 pthread_t t[2]; 24 pthread_create(&t[0], NULL, Thread1, data); 25 pthread_create(&t[1], NULL, Thread2, data); 26 pthread_join(t[0], NULL); 27 pthread_join(t[1], NULL); 28 delete data; 29 } 30 31 // CHECK: ptr1=[[PTR1:0x[0-9,a-f]+]] 32 // CHECK: ptr2=[[PTR2:0x[0-9,a-f]+]] 33 // CHECK: WARNING: ThreadSanitizer: data race 34 // CHECK: Write of size 1 at [[PTR2]] by thread 2: 35 // CHECK: Previous write of size 4 at [[PTR1]] by thread 1: 36 37
