am b478dab3: Merge "Add read barriers for the weak roots in the JNI weak globals."

* commit 'b478dab31955402e9f78665f45a3fb24f8f17b77':
  Add read barriers for the weak roots in the JNI weak globals.

1 files changed, 5 insertions, 1 deletions

diff --git a/runtime/indirect_reference_table-inl.h b/runtime/indirect_reference_table-inl.h
index 42a9757951..790f4d0c17 100644
--- a/runtime/indirect_reference_table-inl.h
+++ b/runtime/indirect_reference_table-inl.h
@@ -71,12 +71,16 @@ inline bool IndirectReferenceTable::CheckEntry(const char* what, IndirectRef ire
   return true;
 }
 
+template<ReadBarrierOption kReadBarrierOption>
 inline mirror::Object* IndirectReferenceTable::Get(IndirectRef iref) const {
   if (!GetChecked(iref)) {
     return kInvalidIndirectRefObject;
   }
-  mirror::Object* obj = table_[ExtractIndex(iref)];
+  mirror::Object** root = &table_[ExtractIndex(iref)];
+  mirror::Object* obj = *root;
   if (LIKELY(obj != kClearedJniWeakGlobal)) {
+    // The read barrier or VerifyObject won't handle kClearedJniWeakGlobal.
+    obj = ReadBarrier::BarrierForWeakRoot<mirror::Object, kReadBarrierOption>(root);
     VerifyObject(obj);
   }
   return obj;