test/msan/tls_reuse.cc

   1 // RUN: %clangxx_msan -m64 -O0 %s -o %t && %run %t
   2
   3 // Check that when TLS block is reused between threads, its shadow is cleaned.
   4
   5 #include <pthread.h>
   6 #include <stdio.h>
   7
   8 int __thread x;
   9
  10 void *ThreadFn(void *) {
  11   if (!x)
  12     printf("zzz\n");
  13   int y;
  14   int * volatile p = &y;
  15   x = *p;
  16   return 0;
  17 }
  18
  19 int main(void) {
  20   pthread_t t;
  21   for (int i = 0; i < 100; ++i) {
  22     pthread_create(&t, 0, ThreadFn, 0);
  23     pthread_join(t, 0);
  24   }
  25   return 0;
  26 }