compiler-rt/test/tsan/on_exit.cpp

   1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
   2
   3 // on_exit() is not available on Darwin.
   4 // UNSUPPORTED: darwin
   5
   6 #include "test.h"
   7
   8 volatile long global;
   9
  10 void *thread(void *x) {
  11   global++;
  12   barrier_wait(&barrier);
  13   return nullptr;
  14 }
  15
  16 void on_exit_callback(int status, void *arg) {
  17   fprintf(stderr, "on_exit_callback(%d, %lu)\n", status, (long)arg);
  18   global++;
  19 }
  20
  21 int main() {
  22   on_exit(on_exit_callback, (void *)42l);
  23   barrier_init(&barrier, 2);
  24   pthread_t th;
  25   pthread_create(&th, nullptr, thread, nullptr);
  26   pthread_detach(th);
  27   barrier_wait(&barrier);
  28   return 2;
  29 }
  30
  31 // CHECK: on_exit_callback(2, 42)
  32 // CHECK: WARNING: ThreadSanitizer: data race
  33 // CHECK:   Write of size 8
  34 // CHECK:     #0 on_exit_callback
  35 // CHECK:     #1 on_exit_callback_installed_at
  36 // CHECK:     #2 main