SharedMutex TSAN: call destroy only if the annotation was created

Summary:
SharedMutex TSAN: call destroy only if the annotation was created

(Note: this ignores all push blocking failures!)

Reviewed By: yfeldblum

Differential Revision: D27379654

fbshipit-source-id: 90be62eb9e932c83e025a96dd36c4cba992e6267

folly/SharedMutex.h

@@ -771,8 +771,10 @@ class SharedMutexImpl : std::conditional_t<
 
   void annotateDestroy() {
     if (AnnotateForThreadSanitizer) {
-      annotateLazyCreate();
-      annotate_rwlock_destroy(this, __FILE__, __LINE__);
+      // call destroy only if the annotation was created
+      if (state_.load() & kAnnotationCreated) {
+        annotate_rwlock_destroy(this, __FILE__, __LINE__);
+      }
     }
   }