tsan: add a test for __tsan_default_options()

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192873 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 32 insertions, 8 deletions

diff --git a/lib/tsan/lit_tests/default_options.cc b/lib/tsan/lit_tests/default_options.cc
new file mode 100644
index 00000000..652a7bf1
--- /dev/null
+++ b/lib/tsan/lit_tests/default_options.cc
@@ -0,0 +1,32 @@
+// RUN: %clang_tsan -O1 %s -o %t && not %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+
+extern "C" const char *__tsan_default_options() {
+  return "report_bugs=0";
+}
+
+int Global;
+
+void *Thread1(void *x) {
+  Global = 42;
+  return NULL;
+}
+
+void *Thread2(void *x) {
+  Global = 43;
+  return NULL;
+}
+
+int main() {
+  pthread_t t[2];
+  pthread_create(&t[0], NULL, Thread1, NULL);
+  pthread_create(&t[1], NULL, Thread2, NULL);
+  pthread_join(t[0], NULL);
+  pthread_join(t[1], NULL);
+  fprintf(stderr, "DONE\n");
+  return 0;
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer: data race
+// CHECK: DONE
diff --git a/lib/tsan/rtl/tsan_flags.cc b/lib/tsan/rtl/tsan_flags.cc
index 247bf784..cf699f20 100644
--- a/lib/tsan/rtl/tsan_flags.cc
+++ b/lib/tsan/rtl/tsan_flags.cc
@@ -23,14 +23,6 @@ Flags *flags() {
   return &CTX()->flags;
 }
 
-#if !SANITIZER_SUPPORTS_WEAK_HOOKS
-extern "C" {
-SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
-const char* __asan_default_options() { return ""; }
-}  // extern "C"
-#endif
-
-
 // Can be overriden in frontend.
 #ifdef TSAN_EXTERNAL_HOOKS
 void OverrideFlags(Flags *f);