Fix GC race condition in visit roots

While GC visits roots other code can change the set pending exception
due to lack of synchronization.

Change-Id: If387944ac933a66fe176df066c3a0ea52131cad4
Signed-off-by: Serguei Katkov <serguei.i.katkov@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/runtime/thread.h b/runtime/thread.h
index 88b4b0de8f..6569a962a0 100644
--- a/runtime/thread.h
+++ b/runtime/thread.h
@@ -326,7 +326,7 @@ class Thread {
     tlsPtr_.throw_location = throw_location;
   }
 
-  void ClearException() {
+  void ClearException() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
     tlsPtr_.exception = nullptr;
     tlsPtr_.throw_location.Clear();
   }