Mercurial > hg > graal-jvmci-8
view src/share/vm/classfile/metadataOnStackMark.hpp @ 12837:82af7d7a0128
8003420: NPG: make new GC root for pd_set
Summary: Move protection domain oops from system dictionary entries into a seperate set; the system dictionary references entries in that set now. This allows fast iteration during non-classunloading garbage collection. Implementation based on initial prototype from Ioi Lam (iklam).
Reviewed-by: coleenp, iklam
author | tschatzl |
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date | Wed, 09 Oct 2013 10:57:01 +0200 |
parents | 5daaddd917a1 |
children | b12a2a9b05ca |
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/* * Copyright (c) 2013, 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 * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP #define SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP #include "memory/allocation.hpp" class Metadata; // Helper class to mark and unmark metadata used on the stack as either handles // or executing methods, so that it can't be deleted during class redefinition // and class unloading. // This is also used for other things that can be deallocated, like class // metadata during parsing, relocated methods, and methods in backtraces. class MetadataOnStackMark : public StackObj { NOT_PRODUCT(static bool _is_active;) public: MetadataOnStackMark(); ~MetadataOnStackMark(); static void record(Metadata* m); }; #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP