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/* |
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* Copyright (c) 2018, 2019, Oracle and/or its affiliates. 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_SHARED_WEAKPROCESSORPHASES_HPP |
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#define SHARE_GC_SHARED_WEAKPROCESSORPHASES_HPP |
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#include "gc/shared/oopStorageSet.hpp" |
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#include "memory/allocation.hpp" |
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#include "utilities/globalDefinitions.hpp" |
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#include "utilities/macros.hpp" |
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class BoolObjectClosure; |
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class OopClosure; |
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class OopStorage; |
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class WeakProcessorPhases : AllStatic { |
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public: |
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class Iterator; |
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typedef void (*Processor)(BoolObjectClosure*, OopClosure*); |
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enum Phase { |
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// Serial phases. |
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JVMTI_ONLY(jvmti JFR_ONLY(COMMA)) |
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JFR_ONLY(jfr) |
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// Additional implicit phase values follow for oopstorages. |
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}; |
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static const uint serial_phase_start = 0; |
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static const uint serial_phase_count = 0 JVMTI_ONLY(+ 1) JFR_ONLY(+ 1); |
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static const uint oopstorage_phase_start = serial_phase_count; |
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static const uint oopstorage_phase_count = OopStorageSet::weak_count; |
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static const uint phase_count = serial_phase_count + oopstorage_phase_count; |
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// Precondition: value < serial_phase_count |
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static Phase serial_phase(uint value); |
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// Precondition: value < oopstorage_phase_count |
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static Phase oopstorage_phase(uint value); |
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// Indexes relative to the corresponding phase_start constant. |
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// Precondition: is_serial(phase) or is_oopstorage(phase) accordingly |
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static uint serial_index(Phase phase); |
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static uint oopstorage_index(Phase phase); |
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static bool is_serial(Phase phase); |
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static bool is_oopstorage(Phase phase); |
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static Iterator serial_iterator(); |
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static Iterator oopstorage_iterator(); |
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// Precondition: is_serial(phase) |
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static const char* description(Phase phase); |
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// Precondition: is_serial(phase) |
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static Processor processor(Phase phase); |
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}; |
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typedef WeakProcessorPhases::Phase WeakProcessorPhase; |
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class WeakProcessorPhases::Iterator { |
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friend class WeakProcessorPhases; |
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uint _index; |
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uint _limit; |
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Iterator(uint index, uint limit) : _index(index), _limit(limit) {} |
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static const uint singular_value = UINT_MAX; |
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void verify_nonsingular() const NOT_DEBUG_RETURN; |
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void verify_category_match(const Iterator& other) const NOT_DEBUG_RETURN; |
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void verify_dereferenceable() const NOT_DEBUG_RETURN; |
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public: |
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// Construct a singular iterator for later assignment. The only valid |
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// operations are destruction and assignment. |
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Iterator() : _index(singular_value), _limit(singular_value) {} |
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bool is_end() const { |
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verify_nonsingular(); |
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return _index == _limit; |
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} |
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bool operator==(const Iterator& other) const { |
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verify_category_match(other); |
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return _index == other._index; |
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} |
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bool operator!=(const Iterator& other) const { |
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return !operator==(other); |
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} |
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Phase operator*() const { |
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verify_dereferenceable(); |
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return static_cast<Phase>(_index); |
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} |
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// Phase doesn't have members, so no operator->(). |
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Iterator& operator++() { |
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verify_dereferenceable(); |
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++_index; |
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return *this; |
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} |
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Iterator operator++(int) { |
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verify_dereferenceable(); |
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return Iterator(_index++, _limit); |
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} |
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Iterator begin() const { |
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verify_nonsingular(); |
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return *this; |
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} |
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Iterator end() const { |
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verify_nonsingular(); |
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return Iterator(_limit, _limit); |
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} |
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}; |
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inline WeakProcessorPhases::Iterator WeakProcessorPhases::serial_iterator() { |
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return Iterator(serial_phase_start, serial_phase_start + serial_phase_count); |
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} |
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inline WeakProcessorPhases::Iterator WeakProcessorPhases::oopstorage_iterator() { |
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return Iterator(oopstorage_phase_start, oopstorage_phase_start + oopstorage_phase_count); |
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} |
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#endif // SHARE_GC_SHARED_WEAKPROCESSORPHASES_HPP |