compiler-rt/test/asan/TestCases/Linux/unpoison_tls.cpp

   1 // Test that TLS is unpoisoned on thread death.
   2 // REQUIRES: x86-target-arch && !android
   3
   4 // RUN: %clangxx_asan -O0 %s -pthread -o %t && %run %t 2>&1
   5 // RUN: %clangxx_asan -O1 %s -pthread -o %t && %run %t 2>&1
   6
   7 #include <assert.h>
   8 #include <pthread.h>
   9 #include <stdio.h>
  10
  11 #include <sanitizer/asan_interface.h>
  12
  13 __thread int64_t tls_var[2];
  14
  15 volatile int64_t *p_tls_var;
  16
  17 void *first(void *arg) {
  18   ASAN_POISON_MEMORY_REGION(&tls_var, sizeof(tls_var));
  19   p_tls_var = tls_var;
  20   return 0;
  21 }
  22
  23 void *second(void *arg) {
  24   assert(tls_var == p_tls_var);
  25   *p_tls_var = 1;
  26   return 0;
  27 }
  28
  29 int main(int argc, char *argv[]) {
  30   pthread_t p;
  31   assert(0 == pthread_create(&p, 0, first, 0));
  32   assert(0 == pthread_join(p, 0));
  33   assert(0 == pthread_create(&p, 0, second, 0));
  34   assert(0 == pthread_join(p, 0));
  35   return 0;
  36 }