tsan: fix deadlock reporting

currently deadlock detector reports effectively random stacks in report after flush
because it looks at old edges with wrong stacks

llvm-svn: 224519

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_deadlock_detector.h b/compiler-rt/lib/sanitizer_common/sanitizer_deadlock_detector.h
index c3ca210..86d5743 100644 (file)
--- a/compiler-rt/lib/sanitizer_common/sanitizer_deadlock_detector.h
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_deadlock_detector.h
@@ -178,6 +178,7 @@ class DeadlockDetector {
     recycled_nodes_.clear();
     available_nodes_.setAll();
     g_.clear();
+    n_edges_ = 0;
     return getAvailableNode(data);
   }