author | zgu |
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/* |
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* Copyright (c) 2017, 2019, Red Hat, Inc. All rights reserved. |
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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/shenandoahNMethod.hpp" |
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#include "memory/allocation.hpp" |
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#include "memory/iterator.hpp" |
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class ShenandoahHeap; |
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class ShenandoahHeapRegion; |
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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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DEFINE_PAD_MINUS_SIZE(0, DEFAULT_CACHE_LINE_SIZE, sizeof(volatile int)); |
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volatile int _claimed_idx; |
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volatile bool _finished; |
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DEFINE_PAD_MINUS_SIZE(1, DEFAULT_CACHE_LINE_SIZE, 0); |
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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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private: |
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// Noncopyable. |
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ShenandoahParallelCodeCacheIterator(const ShenandoahParallelCodeCacheIterator& o); |
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ShenandoahParallelCodeCacheIterator& operator=(const ShenandoahParallelCodeCacheIterator& o); |
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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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protected: |
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ShenandoahCodeRootsIterator(); |
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~ShenandoahCodeRootsIterator(); |
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template<bool CSET_FILTER> |
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void dispatch_parallel_blobs_do(CodeBlobClosure *f); |
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template<bool CSET_FILTER> |
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void fast_parallel_blobs_do(CodeBlobClosure *f); |
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}; |
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class ShenandoahAllCodeRootsIterator : public ShenandoahCodeRootsIterator { |
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public: |
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ShenandoahAllCodeRootsIterator() : ShenandoahCodeRootsIterator() {}; |
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void possibly_parallel_blobs_do(CodeBlobClosure *f); |
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}; |
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class ShenandoahCsetCodeRootsIterator : public ShenandoahCodeRootsIterator { |
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public: |
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ShenandoahCsetCodeRootsIterator() : ShenandoahCodeRootsIterator() {}; |
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void possibly_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 prepare_concurrent_unloading(); |
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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 |