author | tschatzl |
Wed, 08 Aug 2018 15:31:07 +0200 | |
changeset 51334 | cc2c79d22508 |
parent 50113 | caf115bb98ad |
child 52850 | f527b24990d7 |
permissions | -rw-r--r-- |
50113 | 1 |
/* |
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* Copyright (c) 2017, 2018, 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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#include "precompiled.hpp" |
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#include "jfr/leakprofiler/sampling/objectSample.hpp" |
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#include "jfr/leakprofiler/sampling/sampleList.hpp" |
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#include "oops/oop.inline.hpp" |
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SampleList::SampleList(size_t limit, size_t cache_size) : |
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_free_list(), |
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_in_use_list(), |
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_last_resolved(NULL), |
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51334
cc2c79d22508
8208671: Runtime, JFR, Serviceability changes to allow enabling -Wreorder
tschatzl
parents:
50113
diff
changeset
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_allocated(0), |
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_limit(limit), |
51334
cc2c79d22508
8208671: Runtime, JFR, Serviceability changes to allow enabling -Wreorder
tschatzl
parents:
50113
diff
changeset
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_cache_size(cache_size) { |
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} |
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SampleList::~SampleList() { |
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deallocate_samples(_free_list); |
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deallocate_samples(_in_use_list); |
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} |
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ObjectSample* SampleList::last() const { |
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return _in_use_list.head(); |
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} |
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const ObjectSample* SampleList::last_resolved() const { |
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return _last_resolved; |
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} |
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void SampleList::set_last_resolved(const ObjectSample* sample) { |
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assert(last() == sample, "invariant"); |
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_last_resolved = sample; |
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} |
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void SampleList::link(ObjectSample* sample) { |
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assert(sample != NULL, "invariant"); |
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_in_use_list.prepend(sample); |
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} |
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void SampleList::unlink(ObjectSample* sample) { |
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assert(sample != NULL, "invariant"); |
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if (_last_resolved == sample) { |
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_last_resolved = sample->next(); |
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} |
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reset(_in_use_list.remove(sample)); |
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} |
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ObjectSample* SampleList::reuse(ObjectSample* sample) { |
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assert(sample != NULL, "invariant"); |
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unlink(sample); |
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link(sample); |
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return sample; |
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} |
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void SampleList::populate_cache() { |
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if (_free_list.count() < _cache_size) { |
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const size_t cache_delta = _cache_size - _free_list.count(); |
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for (size_t i = 0; i < cache_delta; ++i) { |
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ObjectSample* sample = newSample(); |
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if (sample != NULL) { |
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_free_list.append(sample); |
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} |
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} |
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} |
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} |
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ObjectSample* SampleList::newSample() const { |
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if (_limit == _allocated) { |
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return NULL; |
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} |
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++_allocated; |
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return new ObjectSample(); |
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} |
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ObjectSample* SampleList::get() { |
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ObjectSample* sample = _free_list.head(); |
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if (sample != NULL) { |
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link(_free_list.remove(sample)); |
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} else { |
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sample = newSample(); |
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if (sample != NULL) { |
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_in_use_list.prepend(sample); |
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} |
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} |
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if (_cache_size > 0 && sample != NULL) { |
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populate_cache(); |
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} |
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return sample; |
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} |
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void SampleList::release(ObjectSample* sample) { |
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assert(sample != NULL, "invariant"); |
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unlink(sample); |
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_free_list.append(sample); |
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} |
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void SampleList::deallocate_samples(List& list) { |
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if (list.count() > 0) { |
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ObjectSample* sample = list.head(); |
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while (sample != NULL) { |
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list.remove(sample); |
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delete sample; |
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sample = list.head(); |
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} |
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} |
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assert(list.count() == 0, "invariant"); |
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} |
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void SampleList::reset(ObjectSample* sample) { |
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assert(sample != NULL, "invariant"); |
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sample->reset(); |
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} |
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bool SampleList::is_full() const { |
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return _in_use_list.count() == _limit; |
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} |
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size_t SampleList::count() const { |
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return _in_use_list.count(); |
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} |