Mercurial > hg > truffle
diff src/share/vm/memory/genRemSet.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
---|---|
date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | f95d63e2154a |
children | ab68fc0101ce |
line wrap: on
line diff
--- a/src/share/vm/memory/genRemSet.cpp Fri Aug 31 16:39:35 2012 -0700 +++ b/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); +}