test/tsan/mop_with_offset.cc

   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 <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: