112 lines
3.5 KiB
C++
112 lines
3.5 KiB
C++
/*
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* Copyright (c) 2017, 2020, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHCODEROOTS_HPP
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#define SHARE_GC_SHENANDOAH_SHENANDOAHCODEROOTS_HPP
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#include "code/codeCache.hpp"
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#include "gc/shenandoah/shenandoahSharedVariables.hpp"
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#include "gc/shenandoah/shenandoahLock.hpp"
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#include "gc/shenandoah/shenandoahPadding.hpp"
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#include "memory/allocation.hpp"
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#include "memory/iterator.hpp"
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#include "utilities/globalDefinitions.hpp"
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class ShenandoahHeap;
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class ShenandoahHeapRegion;
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class ShenandoahNMethodTable;
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class ShenandoahNMethodTableSnapshot;
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class WorkGang;
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class ShenandoahParallelCodeHeapIterator {
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friend class CodeCache;
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private:
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CodeHeap* _heap;
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shenandoah_padding(0);
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volatile int _claimed_idx;
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volatile bool _finished;
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shenandoah_padding(1);
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public:
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ShenandoahParallelCodeHeapIterator(CodeHeap* heap);
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void parallel_blobs_do(CodeBlobClosure* f);
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};
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class ShenandoahParallelCodeCacheIterator {
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friend class CodeCache;
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private:
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ShenandoahParallelCodeHeapIterator* _iters;
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int _length;
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NONCOPYABLE(ShenandoahParallelCodeCacheIterator);
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public:
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ShenandoahParallelCodeCacheIterator(const GrowableArray<CodeHeap*>* heaps);
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~ShenandoahParallelCodeCacheIterator();
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void parallel_blobs_do(CodeBlobClosure* f);
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};
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class ShenandoahCodeRootsIterator {
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friend class ShenandoahCodeRoots;
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protected:
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ShenandoahParallelCodeCacheIterator _par_iterator;
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ShenandoahSharedFlag _seq_claimed;
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ShenandoahNMethodTableSnapshot* _table_snapshot;
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public:
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ShenandoahCodeRootsIterator();
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~ShenandoahCodeRootsIterator();
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void possibly_parallel_blobs_do(CodeBlobClosure *f);
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void fast_parallel_blobs_do(CodeBlobClosure *f);
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};
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class ShenandoahCodeRoots : public AllStatic {
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friend class ShenandoahHeap;
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friend class ShenandoahCodeRootsIterator;
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public:
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static void initialize();
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static void register_nmethod(nmethod* nm);
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static void unregister_nmethod(nmethod* nm);
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static void flush_nmethod(nmethod* nm);
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static ShenandoahNMethodTable* table() {
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return _nmethod_table;
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}
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// Concurrent nmethod unloading support
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static void unlink(WorkGang* workers, bool unloading_occurred);
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static void purge(WorkGang* workers);
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static void arm_nmethods();
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static void disarm_nmethods();
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static int disarmed_value() { return _disarmed_value; }
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static int* disarmed_value_address() { return &_disarmed_value; }
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private:
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static ShenandoahNMethodTable* _nmethod_table;
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static int _disarmed_value;
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};
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#endif // SHARE_GC_SHENANDOAH_SHENANDOAHCODEROOTS_HPP
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