Mercurial > hg > graal-jvmci-8
view src/share/vm/classfile/metadataOnStackMark.hpp @ 24225:a2dbb6fcc923
Added tag jvmci-0.33 for changeset 3aed4cb813f4
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 18 Aug 2017 22:47:33 +0200 |
parents | b12a2a9b05ca |
children |
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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" #include "utilities/chunkedList.hpp" class Metadata; typedef ChunkedList<Metadata*, mtInternal> MetadataOnStackBuffer; // 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;) static volatile MetadataOnStackBuffer* _used_buffers; static volatile MetadataOnStackBuffer* _free_buffers; static MetadataOnStackBuffer* allocate_buffer(); static void retire_buffer(MetadataOnStackBuffer* buffer); public: MetadataOnStackMark(bool visit_code_cache); ~MetadataOnStackMark(); static void record(Metadata* m, Thread* thread); static void retire_buffer_for_thread(Thread* thread); static bool has_buffer_for_thread(Thread* thread); }; #endif // SHARE_VM_CLASSFILE_METADATAONSTACKMARK_HPP