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#include <pthread.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
char *data = new char[10];
char *data1 = new char[10];
char *data2 = new char[10];
void *Thread1(void *x) {
memcpy(data+5, data1, 1);
return NULL;
}
void *Thread2(void *x) {
usleep(500*1000);
memcpy(data+3, data2, 4);
return NULL;
}
int main() {
fprintf(stderr, "addr=%p\n", &data[5]);
pthread_t t[2];
pthread_create(&t[0], NULL, Thread1, NULL);
pthread_create(&t[1], NULL, Thread2, NULL);
pthread_join(t[0], NULL);
pthread_join(t[1], NULL);
return 0;
}
// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 1 at [[ADDR]] by thread 2:
// CHECK: #0 memcpy
// CHECK: #1 Thread2
// CHECK: Previous write of size 1 at [[ADDR]] by thread 1:
// CHECK: #0 memcpy
// CHECK: #1 Thread1
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