--- a/hotspot/src/share/vm/memory/genRemSet.cpp Fri Aug 31 16:39:35 2012 -0700
+++ b/hotspot/src/share/vm/memory/genRemSet.cpp Sat Sep 01 13:25:18 2012 -0400
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -23,6 +23,7 @@
*/
#include "precompiled.hpp"
+#include "classfile/classLoaderData.hpp"
#include "memory/cardTableRS.hpp"
#include "memory/genRemSet.hpp"
@@ -39,3 +40,43 @@
return (0); // Make Windows compiler happy
}
}
+
+class HasAccumulatedModifiedOopsClosure : public KlassClosure {
+ bool _found;
+ public:
+ HasAccumulatedModifiedOopsClosure() : _found(false) {}
+ void do_klass(Klass* klass) {
+ if (_found) {
+ return;
+ }
+
+ if (klass->has_accumulated_modified_oops()) {
+ _found = true;
+ }
+ }
+ bool found() {
+ return _found;
+ }
+};
+
+bool KlassRemSet::mod_union_is_clear() {
+ HasAccumulatedModifiedOopsClosure closure;
+ ClassLoaderDataGraph::classes_do(&closure);
+
+ return !closure.found();
+}
+
+
+class ClearKlassModUnionClosure : public KlassClosure {
+ public:
+ void do_klass(Klass* klass) {
+ if (klass->has_accumulated_modified_oops()) {
+ klass->clear_accumulated_modified_oops();
+ }
+ }
+};
+
+void KlassRemSet::clear_mod_union() {
+ ClearKlassModUnionClosure closure;
+ ClassLoaderDataGraph::classes_do(&closure);
+}