test/tsan/ignore_race.cc

   1 // RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
   2 #include <pthread.h>
   3 #include <stdio.h>
   4 #include <unistd.h>
   5
   6 int Global;
   7
   8 extern "C" void AnnotateIgnoreWritesBegin(const char *f, int l);
   9 extern "C" void AnnotateIgnoreWritesEnd(const char *f, int l);
  10 extern "C" void AnnotateIgnoreReadsBegin(const char *f, int l);
  11 extern "C" void AnnotateIgnoreReadsEnd(const char *f, int l);
  12
  13 void *Thread(void *x) {
  14   AnnotateIgnoreWritesBegin(__FILE__, __LINE__);
  15   AnnotateIgnoreReadsBegin(__FILE__, __LINE__);
  16   Global = 42;
  17   AnnotateIgnoreReadsEnd(__FILE__, __LINE__);
  18   AnnotateIgnoreWritesEnd(__FILE__, __LINE__);
  19   return 0;
  20 }
  21
  22 int main() {
  23   pthread_t t;
  24   pthread_create(&t, 0, Thread, 0);
  25   sleep(1);
  26   Global = 43;
  27   pthread_join(t, 0);
  28   printf("OK\n");
  29 }
  30
  31 // CHECK-NOT: WARNING: ThreadSanitizer: data race