src/libcompiler_builtins/compiler-rt/test/tsan/ignore_race.cc

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