compiler-rt/test/tsan/mop_with_offset.cpp

   1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2 #include "test.h"
   3
   4 void *Thread1(void *x) {
   5   int *p = (int*)x;
   6   p[0] = 1;
   7   barrier_wait(&barrier);
   8   return NULL;
   9 }
  10
  11 void *Thread2(void *x) {
  12   barrier_wait(&barrier);
  13   char *p = (char*)x;
  14   p[2] = 1;
  15   return NULL;
  16 }
  17
  18 int main() {
  19   barrier_init(&barrier, 2);
  20   int *data = new int(42);
  21   print_address("ptr1=", 1, data);
  22   print_address("ptr2=", 1, (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 T2:
  35 // CHECK:   Previous write of size 4 at [[PTR1]] by thread T1: