author | zgu |
Wed, 15 May 2019 08:58:23 -0400 | |
changeset 54882 | b99e97bc5040 |
parent 54825 | 1b03400e5a8f |
child 54924 | ba1eccda5450 |
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/shenandoahClosures.inline.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 "memory/universe.hpp" |
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#include "runtime/thread.hpp" |
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#include "services/management.hpp" |
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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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_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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if (_processed_weak_roots) { |
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assert(_weak_processor_timings.max_threads() == n_workers(), "Must match"); |
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ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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ShenandoahTimingConverter::weak_processing_timing_to_shenandoah_timing(&_weak_processor_timings, |
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worker_times); |
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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::process_strong_roots(OopClosure* oops, |
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CLDClosure* clds, |
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CodeBlobClosure* blobs, |
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ThreadClosure* thread_cl, |
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uint worker_id) { |
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process_java_roots(oops, clds, NULL, blobs, thread_cl, worker_id); |
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process_vm_roots(oops, worker_id); |
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_process_strong_tasks->all_tasks_completed(n_workers()); |
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} |
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void ShenandoahRootProcessor::process_all_roots(OopClosure* oops, |
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CLDClosure* clds, |
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CodeBlobClosure* blobs, |
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ThreadClosure* thread_cl, |
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uint worker_id) { |
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ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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process_java_roots(oops, clds, clds, blobs, thread_cl, worker_id); |
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process_vm_roots(oops, worker_id); |
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if (blobs != NULL) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::CodeCacheRoots, worker_id); |
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_coderoots_all_iterator.possibly_parallel_blobs_do(blobs); |
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} |
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_process_strong_tasks->all_tasks_completed(n_workers()); |
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} |
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class ShenandoahParallelOopsDoThreadClosure : public ThreadClosure { |
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private: |
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111 |
OopClosure* _f; |
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CodeBlobClosure* _cf; |
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113 |
ThreadClosure* _thread_cl; |
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114 |
public: |
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ShenandoahParallelOopsDoThreadClosure(OopClosure* f, CodeBlobClosure* cf, ThreadClosure* thread_cl) : |
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_f(f), _cf(cf), _thread_cl(thread_cl) {} |
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117 |
|
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void do_thread(Thread* t) { |
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if (_thread_cl != NULL) { |
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_thread_cl->do_thread(t); |
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121 |
} |
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122 |
t->oops_do(_f, _cf); |
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123 |
} |
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124 |
}; |
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125 |
|
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126 |
void ShenandoahRootProcessor::process_java_roots(OopClosure* strong_roots, |
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127 |
CLDClosure* strong_clds, |
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128 |
CLDClosure* weak_clds, |
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129 |
CodeBlobClosure* strong_code, |
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130 |
ThreadClosure* thread_cl, |
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uint worker_id) |
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132 |
{ |
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133 |
ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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// Iterating over the CLDG and the Threads are done early to allow us to |
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// first process the strong CLDs and nmethods and then, after a barrier, |
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// let the thread process the weak CLDs and nmethods. |
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137 |
{ |
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138 |
ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::CLDGRoots, worker_id); |
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139 |
_cld_iterator.root_cld_do(strong_clds, weak_clds); |
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140 |
} |
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141 |
|
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142 |
{ |
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143 |
ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ThreadRoots, worker_id); |
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144 |
bool is_par = n_workers() > 1; |
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145 |
ResourceMark rm; |
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146 |
ShenandoahParallelOopsDoThreadClosure cl(strong_roots, strong_code, thread_cl); |
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Threads::possibly_parallel_threads_do(is_par, &cl); |
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148 |
} |
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149 |
} |
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150 |
|
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151 |
void ShenandoahRootProcessor::process_vm_roots(OopClosure* strong_roots, |
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uint worker_id) { |
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ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
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if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_Universe_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::UniverseRoots, worker_id); |
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156 |
Universe::oops_do(strong_roots); |
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157 |
} |
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158 |
|
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159 |
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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161 |
JNIHandles::oops_do(strong_roots); |
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162 |
} |
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163 |
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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165 |
Management::oops_do(strong_roots); |
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166 |
} |
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167 |
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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169 |
JvmtiExport::oops_do(strong_roots); |
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170 |
} |
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171 |
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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174 |
} |
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175 |
|
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176 |
{ |
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177 |
ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ObjectSynchronizerRoots, worker_id); |
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178 |
if (_process_strong_tasks->try_claim_task(SHENANDOAH_RP_PS_ObjectSynchronizer_oops_do)) { |
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179 |
ObjectSynchronizer::oops_do(strong_roots); |
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180 |
} |
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181 |
} |
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182 |
} |
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183 |
|
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184 |
uint ShenandoahRootProcessor::n_workers() const { |
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return _srs.n_threads(); |
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186 |
} |
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187 |
|
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ShenandoahRootEvacuator::ShenandoahRootEvacuator(ShenandoahHeap* heap, uint n_workers, ShenandoahPhaseTimings::Phase phase) : |
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189 |
_evacuation_tasks(new SubTasksDone(SHENANDOAH_EVAC_NumElements)), |
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190 |
_srs(n_workers), |
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191 |
_phase(phase), |
54687 | 192 |
_coderoots_cset_iterator(ShenandoahCodeRoots::cset_iterator()), |
193 |
_weak_processor_timings(n_workers), |
|
194 |
_weak_processor_task(&_weak_processor_timings, n_workers) { |
|
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195 |
heap->phase_timings()->record_workers_start(_phase); |
54423 | 196 |
if (ShenandoahStringDedup::is_enabled()) { |
197 |
StringDedup::gc_prologue(false); |
|
198 |
} |
|
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199 |
} |
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200 |
|
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201 |
ShenandoahRootEvacuator::~ShenandoahRootEvacuator() { |
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202 |
delete _evacuation_tasks; |
54423 | 203 |
if (ShenandoahStringDedup::is_enabled()) { |
204 |
StringDedup::gc_epilogue(); |
|
205 |
} |
|
54687 | 206 |
|
207 |
ShenandoahWorkerTimings* worker_times = ShenandoahHeap::heap()->phase_timings()->worker_times(); |
|
208 |
assert(_weak_processor_timings.max_threads() == n_workers(), "Must match"); |
|
209 |
ShenandoahTimingConverter::weak_processing_timing_to_shenandoah_timing(&_weak_processor_timings, |
|
210 |
worker_times); |
|
211 |
||
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ShenandoahHeap::heap()->phase_timings()->record_workers_end(_phase); |
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213 |
} |
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214 |
|
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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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218 |
|
54687 | 219 |
AlwaysTrueClosure always_true; |
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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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Threads::possibly_parallel_oops_do(is_par, oops, NULL); |
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} |
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{ |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::CLDGRoots, worker_id); |
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CLDToOopClosure clds(oops, ClassLoaderData::_claim_strong); |
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_cld_iterator.root_cld_do(&clds, &clds); |
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} |
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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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|
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if (ShenandoahStringDedup::is_enabled()) { |
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ShenandoahStringDedup::parallel_oops_do(&always_true, oops, worker_id); |
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} |
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if (_evacuation_tasks->try_claim_task(SHENANDOAH_EVAC_Universe_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::UniverseRoots, worker_id); |
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Universe::oops_do(oops); |
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} |
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if (_evacuation_tasks->try_claim_task(SHENANDOAH_EVAC_Management_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ManagementRoots, worker_id); |
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Management::oops_do(oops); |
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} |
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if (_evacuation_tasks->try_claim_task(SHENANDOAH_EVAC_jvmti_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::JVMTIRoots, worker_id); |
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JvmtiExport::oops_do(oops); |
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ShenandoahForwardedIsAliveClosure is_alive; |
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JvmtiExport::weak_oops_do(&is_alive, oops); |
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} |
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if (_evacuation_tasks->try_claim_task(SHENANDOAH_EVAC_JNIHandles_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::JNIRoots, worker_id); |
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JNIHandles::oops_do(oops); |
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} |
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if (_evacuation_tasks->try_claim_task(SHENANDOAH_EVAC_SystemDictionary_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::SystemDictionaryRoots, worker_id); |
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SystemDictionary::oops_do(oops); |
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} |
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if (_evacuation_tasks->try_claim_task(SHENANDOAH_EVAC_ObjectSynchronizer_oops_do)) { |
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ShenandoahWorkerTimingsTracker timer(worker_times, ShenandoahPhaseTimings::ObjectSynchronizerRoots, worker_id); |
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ObjectSynchronizer::oops_do(oops); |
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} |
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_weak_processor_task.work<AlwaysTrueClosure, OopClosure>(worker_id, &always_true, oops); |
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} |
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277 |
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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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// 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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void ParallelCLDRootIterator::root_cld_do(CLDClosure* strong, CLDClosure* weak) { |
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ClassLoaderDataGraph::roots_cld_do(strong, weak); |
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} |