[TSan] Add the WTFAnnotateBenignRaceSized implementation and a test for

WTFAnnotateBenignRaceSized and AnnotateBenignRaceSized.

llvm-svn: 178534

1 files changed, 39 insertions, 0 deletions

diff --git a/compiler-rt/lib/tsan/lit_tests/benign_race.cc b/compiler-rt/lib/tsan/lit_tests/benign_race.cc
new file mode 100644
index 00000000000..a4d4d23c362
--- /dev/null
+++ b/compiler-rt/lib/tsan/lit_tests/benign_race.cc
@@ -0,0 +1,39 @@
+// RUN: %clang_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int Global;
+int WTFGlobal;
+
+extern "C" {
+void AnnotateBenignRaceSized(const char *f, int l,
+                             void *mem, unsigned int size, const char *desc);
+void WTFAnnotateBenignRaceSized(const char *f, int l,
+                                void *mem, unsigned int size,
+                                const char *desc);
+}
+
+
+void *Thread(void *x) {
+  Global = 42;
+  WTFGlobal = 142;
+  return 0;
+}
+
+int main() {
+  AnnotateBenignRaceSized(__FILE__, __LINE__,
+                          &Global, sizeof(Global), "Race on Global");
+  WTFAnnotateBenignRaceSized(__FILE__, __LINE__,
+                             &WTFGlobal, sizeof(WTFGlobal),
+                             "Race on WTFGlobal");
+  pthread_t t;
+  pthread_create(&t, 0, Thread, 0);
+  sleep(1);
+  Global = 43;
+  WTFGlobal = 143;
+  pthread_join(t, 0);
+  printf("OK\n");
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer: data race