unpoison_tls.cc revision 2d1fdb26e458c4ddc04155c1d421bced3ba90cd0 
1// Test that TLS is unpoisoned on thread death.
2// REQUIRES: x86_64-supported-target,i386-supported-target
3
4// RUN: %clangxx_asan -O1 %s -lpthread -o %t && %run %t 2>&1
5
6#include <assert.h>
7#include <pthread.h>
8#include <stdio.h>
9
10#include <sanitizer/asan_interface.h>
11
12__thread int64_t tls_var[2];
13
14volatile int64_t *p_tls_var;
15
16void *first(void *arg) {
17  ASAN_POISON_MEMORY_REGION(&tls_var, sizeof(tls_var));
18  p_tls_var = tls_var;
19  return 0;
20}
21
22void *second(void *arg) {
23  assert(tls_var == p_tls_var);
24  *p_tls_var = 1;
25  return 0;
26}
27
28int main(int argc, char *argv[]) {
29  pthread_t p;
30  assert(0 == pthread_create(&p, 0, first, 0));
31  assert(0 == pthread_join(p, 0));
32  assert(0 == pthread_create(&p, 0, second, 0));
33  assert(0 == pthread_join(p, 0));
34  return 0;
35}
36