author | rkennke |
Tue, 02 Apr 2019 18:13:42 +0200 | |
changeset 54383 | cdc3bb0983a6 |
parent 54344 | 8cd2af66ac7c |
child 54423 | 6c0ab8bd8da5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 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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#include "precompiled.hpp" |
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#include "classfile/classLoaderDataGraph.hpp" |
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#include "classfile/stringTable.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "code/codeCache.hpp" |
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#include "gc/shenandoah/shenandoahRootProcessor.hpp" |
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#include "gc/shenandoah/shenandoahHeap.hpp" |
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#include "gc/shenandoah/shenandoahPhaseTimings.hpp" |
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#include "gc/shenandoah/shenandoahStringDedup.hpp" |
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#include "gc/shenandoah/shenandoahTimingTracker.hpp" |
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#include "gc/shenandoah/shenandoahUtils.hpp" |
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#include "gc/shenandoah/shenandoahVMOperations.hpp" |
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#include "gc/shared/weakProcessor.inline.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "memory/iterator.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "runtime/thread.hpp" |
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#include "services/management.hpp" |
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struct PhaseMap { |
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WeakProcessorPhases::Phase _weak_processor_phase; |
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ShenandoahPhaseTimings::GCParPhases _shenandoah_phase; |
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}; |
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static const struct PhaseMap phase_mapping[] = { |
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#if INCLUDE_JVMTI |
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{WeakProcessorPhases::jvmti, ShenandoahPhaseTimings::JVMTIWeakRoots}, |
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#endif |
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#if INCLUDE_JFR |
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{WeakProcessorPhases::jfr, ShenandoahPhaseTimings::JFRWeakRoots}, |
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#endif |
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{WeakProcessorPhases::jni, ShenandoahPhaseTimings::JNIWeakRoots}, |
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{WeakProcessorPhases::stringtable, ShenandoahPhaseTimings::StringTableRoots}, |
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{WeakProcessorPhases::vm, ShenandoahPhaseTimings::VMWeakRoots} |
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}; |
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STATIC_ASSERT(sizeof(phase_mapping) / sizeof(PhaseMap) == WeakProcessorPhases::phase_count); |
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ShenandoahRootProcessor::ShenandoahRootProcessor(ShenandoahHeap* heap, uint n_workers, |
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ShenandoahPhaseTimings::Phase phase) : |
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_process_strong_tasks(new SubTasksDone(SHENANDOAH_RP_PS_NumElements)), |
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_srs(n_workers), |
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_par_state_string(StringTable::weak_storage()), |
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_phase(phase), |
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_coderoots_all_iterator(ShenandoahCodeRoots::iterator()), |
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_weak_processor_timings(n_workers), |
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_weak_processor_task(&_weak_processor_timings, n_workers), |
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_processed_weak_roots(false) { |
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heap->phase_timings()->record_workers_start(_phase); |
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if (ShenandoahStringDedup::is_enabled()) { |
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StringDedup::gc_prologue(false); |
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} |
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} |
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ShenandoahRootProcessor::~ShenandoahRootProcessor() { |
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delete _process_strong_tasks; |
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if (ShenandoahStringDedup::is_enabled()) { |
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StringDedup::gc_epilogue(); |
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} |
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ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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if (_processed_weak_roots) { |
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assert(_weak_processor_timings.max_threads() == n_workers(), "Must match"); |
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for (uint index = 0; index < WeakProcessorPhases::phase_count; index ++) { |
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weak_processor_timing_to_shenandoah_timing(phase_mapping[index]._weak_processor_phase, |
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phase_mapping[index]._shenandoah_phase, |
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worker_times); |
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} |
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} |
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ShenandoahHeap::heap()->phase_timings()->record_workers_end(_phase); |
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} |
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void ShenandoahRootProcessor::weak_processor_timing_to_shenandoah_timing(const WeakProcessorPhases::Phase wpp, |
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const ShenandoahPhaseTimings::GCParPhases spp, |
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ShenandoahWorkerTimings* worker_times) const { |
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if (WeakProcessorPhases::is_serial(wpp)) { |
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worker_times->record_time_secs(spp, 0, _weak_processor_timings.phase_time_sec(wpp)); |
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} else { |
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for (uint index = 0; index < _weak_processor_timings.max_threads(); index ++) { |
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worker_times->record_time_secs(spp, index, _weak_processor_timings.worker_time_sec(index, wpp)); |
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} |
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} |
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110 |
} |
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111 |
|
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void ShenandoahRootProcessor::process_all_roots_slow(OopClosure* oops) { |
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113 |
CLDToOopClosure clds(oops, ClassLoaderData::_claim_strong); |
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114 |
CodeBlobToOopClosure blobs(oops, !CodeBlobToOopClosure::FixRelocations); |
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115 |
|
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116 |
CodeCache::blobs_do(&blobs); |
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117 |
ClassLoaderDataGraph::cld_do(&clds); |
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118 |
Universe::oops_do(oops); |
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119 |
Management::oops_do(oops); |
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120 |
JvmtiExport::oops_do(oops); |
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121 |
JNIHandles::oops_do(oops); |
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122 |
ObjectSynchronizer::oops_do(oops); |
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SystemDictionary::oops_do(oops); |
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124 |
|
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125 |
// Do thread roots the last. This allows verification code to find |
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126 |
// any broken objects from those special roots first, not the accidental |
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// dangling reference from the thread root. |
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128 |
Threads::possibly_parallel_oops_do(false, oops, &blobs); |
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129 |
} |
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130 |
|
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131 |
void ShenandoahRootProcessor::process_strong_roots(OopClosure* oops, |
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132 |
CLDClosure* clds, |
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133 |
CodeBlobClosure* blobs, |
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134 |
ThreadClosure* thread_cl, |
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135 |
uint worker_id) { |
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136 |
|
54344 | 137 |
process_java_roots(oops, clds, NULL, blobs, thread_cl, worker_id); |
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138 |
process_vm_roots(oops, worker_id); |
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139 |
|
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140 |
_process_strong_tasks->all_tasks_completed(n_workers()); |
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141 |
} |
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142 |
|
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143 |
void ShenandoahRootProcessor::process_all_roots(OopClosure* oops, |
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144 |
CLDClosure* clds, |
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145 |
CodeBlobClosure* blobs, |
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146 |
ThreadClosure* thread_cl, |
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uint worker_id) { |
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148 |
|
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149 |
ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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150 |
process_java_roots(oops, clds, clds, blobs, thread_cl, worker_id); |
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151 |
process_vm_roots(oops, worker_id); |
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152 |
|
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153 |
if (blobs != NULL) { |
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154 |
ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::CodeCacheRoots, worker_id); |
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155 |
_coderoots_all_iterator.possibly_parallel_blobs_do(blobs); |
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|
156 |
} |
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|
157 |
|
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158 |
_process_strong_tasks->all_tasks_completed(n_workers()); |
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159 |
|
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160 |
} |
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161 |
|
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162 |
class ShenandoahParallelOopsDoThreadClosure : public ThreadClosure { |
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163 |
private: |
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164 |
OopClosure* _f; |
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165 |
CodeBlobClosure* _cf; |
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166 |
ThreadClosure* _thread_cl; |
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167 |
public: |
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|
168 |
ShenandoahParallelOopsDoThreadClosure(OopClosure* f, CodeBlobClosure* cf, ThreadClosure* thread_cl) : |
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169 |
_f(f), _cf(cf), _thread_cl(thread_cl) {} |
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|
170 |
|
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171 |
void do_thread(Thread* t) { |
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172 |
if (_thread_cl != NULL) { |
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|
173 |
_thread_cl->do_thread(t); |
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|
174 |
} |
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|
175 |
t->oops_do(_f, _cf); |
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|
176 |
} |
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|
177 |
}; |
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|
178 |
|
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|
179 |
void ShenandoahRootProcessor::process_java_roots(OopClosure* strong_roots, |
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180 |
CLDClosure* strong_clds, |
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181 |
CLDClosure* weak_clds, |
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182 |
CodeBlobClosure* strong_code, |
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183 |
ThreadClosure* thread_cl, |
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|
184 |
uint worker_id) |
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|
185 |
{ |
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|
186 |
ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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|
187 |
// Iterating over the CLDG and the Threads are done early to allow us to |
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|
188 |
// first process the strong CLDs and nmethods and then, after a barrier, |
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|
189 |
// let the thread process the weak CLDs and nmethods. |
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|
190 |
{ |
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|
191 |
ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::CLDGRoots, worker_id); |
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|
192 |
_cld_iterator.root_cld_do(strong_clds, weak_clds); |
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|
193 |
} |
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|
194 |
|
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195 |
{ |
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|
196 |
ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ThreadRoots, worker_id); |
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|
197 |
bool is_par = n_workers() > 1; |
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198 |
ResourceMark rm; |
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|
199 |
ShenandoahParallelOopsDoThreadClosure cl(strong_roots, strong_code, thread_cl); |
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|
200 |
Threads::possibly_parallel_threads_do(is_par, &cl); |
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|
201 |
} |
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202 |
} |
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|
203 |
|
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204 |
void ShenandoahRootProcessor::process_vm_roots(OopClosure* strong_roots, |
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205 |
uint worker_id) { |
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206 |
ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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|
207 |
if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_Universe_oops_do)) { |
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208 |
ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::UniverseRoots, worker_id); |
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|
209 |
Universe::oops_do(strong_roots); |
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|
210 |
} |
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211 |
|
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212 |
if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_JNIHandles_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::JNIRoots, worker_id); |
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JNIHandles::oops_do(strong_roots); |
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} |
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if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_Management_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ManagementRoots, worker_id); |
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Management::oops_do(strong_roots); |
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} |
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if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_jvmti_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::JVMTIRoots, worker_id); |
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JvmtiExport::oops_do(strong_roots); |
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} |
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if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_SystemDictionary_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::SystemDictionaryRoots, worker_id); |
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SystemDictionary::oops_do(strong_roots); |
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} |
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|
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{ |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ObjectSynchronizerRoots, worker_id); |
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if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_ObjectSynchronizer_oops_do)) { |
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ObjectSynchronizer::oops_do(strong_roots); |
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} |
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} |
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} |
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|
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uint ShenandoahRootProcessor::n_workers() const { |
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return _srs.n_threads(); |
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} |
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240 |
|
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ShenandoahRootEvacuator::ShenandoahRootEvacuator(ShenandoahHeap* heap, uint n_workers, ShenandoahPhaseTimings::Phase phase) : |
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_evacuation_tasks(new SubTasksDone(SHENANDOAH_EVAC_NumElements)), |
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_srs(n_workers), |
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_phase(phase), |
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_coderoots_cset_iterator(ShenandoahCodeRoots::cset_iterator()) |
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{ |
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heap->phase_timings()->record_workers_start(_phase); |
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} |
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|
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ShenandoahRootEvacuator::~ShenandoahRootEvacuator() { |
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delete _evacuation_tasks; |
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ShenandoahHeap::heap()->phase_timings()->record_workers_end(_phase); |
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} |
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|
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void ShenandoahRootEvacuator::process_evacuate_roots(OopClosure* oops, |
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CodeBlobClosure* blobs, |
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uint worker_id) { |
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|
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ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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{ |
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bool is_par = n_workers() > 1; |
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ResourceMark rm; |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ThreadRoots, worker_id); |
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|
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Threads::possibly_parallel_oops_do(is_par, oops, NULL); |
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} |
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267 |
|
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if (blobs != NULL) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::CodeCacheRoots, worker_id); |
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_coderoots_cset_iterator.possibly_parallel_blobs_do(blobs); |
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} |
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272 |
|
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if (_evacuation_tasks->try_claim_task(SHENANDOAH_EVAC_jvmti_oops_do)) { |
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ShenandoahForwardedIsAliveClosure is_alive; |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::JVMTIRoots, worker_id); |
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JvmtiExport::weak_oops_do(&is_alive, oops); |
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} |
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} |
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279 |
|
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uint ShenandoahRootEvacuator::n_workers() const { |
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return _srs.n_threads(); |
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} |
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283 |
|
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// Implemenation of ParallelCLDRootIterator |
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ParallelCLDRootIterator::ParallelCLDRootIterator() { |
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assert(SafepointSynchronize::is_at_safepoint(), "Must at safepoint"); |
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ClassLoaderDataGraph::clear_claimed_marks(); |
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} |
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289 |
|
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void ParallelCLDRootIterator::root_cld_do(CLDClosure* strong, CLDClosure* weak) { |
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ClassLoaderDataGraph::roots_cld_do(strong, weak); |
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} |