author | stefank |
Thu, 21 May 2015 09:23:46 +0200 | |
changeset 30869 | d5cbedffb50b |
parent 30868 | c1b24f26deed |
child 30870 | 3050fdcdc60b |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2000, 2015, 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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||
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#include "precompiled.hpp" |
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#include "classfile/symbolTable.hpp" |
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#include "classfile/systemDictionary.hpp" |
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#include "classfile/vmSymbols.hpp" |
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#include "code/codeCache.hpp" |
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#include "code/icBuffer.hpp" |
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#include "gc/shared/collectedHeap.inline.hpp" |
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#include "gc/shared/collectorCounters.hpp" |
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#include "gc/shared/gcLocker.inline.hpp" |
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#include "gc/shared/gcTrace.hpp" |
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#include "gc/shared/gcTraceTime.hpp" |
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#include "gc/shared/genCollectedHeap.hpp" |
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#include "gc/shared/genOopClosures.inline.hpp" |
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#include "gc/shared/generationSpec.hpp" |
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#include "gc/shared/space.hpp" |
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#include "gc/shared/strongRootsScope.hpp" |
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#include "gc/shared/vmGCOperations.hpp" |
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#include "gc/shared/workgroup.hpp" |
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#include "memory/filemap.hpp" |
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#include "memory/resourceArea.hpp" |
|
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#include "oops/oop.inline.hpp" |
|
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#include "runtime/biasedLocking.hpp" |
|
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#include "runtime/fprofiler.hpp" |
|
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#include "runtime/handles.hpp" |
|
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#include "runtime/handles.inline.hpp" |
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#include "runtime/java.hpp" |
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#include "runtime/vmThread.hpp" |
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#include "services/management.hpp" |
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#include "services/memoryService.hpp" |
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#include "utilities/macros.hpp" |
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#include "utilities/stack.inline.hpp" |
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#include "utilities/vmError.hpp" |
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#if INCLUDE_ALL_GCS |
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#include "gc/cms/concurrentMarkSweepThread.hpp" |
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#include "gc/cms/vmCMSOperations.hpp" |
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#endif // INCLUDE_ALL_GCS |
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NOT_PRODUCT(size_t GenCollectedHeap::_skip_header_HeapWords = 0;) |
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// The set of potentially parallel tasks in root scanning. |
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enum GCH_strong_roots_tasks { |
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GCH_PS_Universe_oops_do, |
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GCH_PS_JNIHandles_oops_do, |
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GCH_PS_ObjectSynchronizer_oops_do, |
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GCH_PS_FlatProfiler_oops_do, |
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GCH_PS_Management_oops_do, |
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GCH_PS_SystemDictionary_oops_do, |
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GCH_PS_ClassLoaderDataGraph_oops_do, |
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GCH_PS_jvmti_oops_do, |
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GCH_PS_CodeCache_oops_do, |
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GCH_PS_younger_gens, |
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// Leave this one last. |
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GCH_PS_NumElements |
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}; |
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||
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GenCollectedHeap::GenCollectedHeap(GenCollectorPolicy *policy) : |
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CollectedHeap(), |
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_rem_set(NULL), |
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_gen_policy(policy), |
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_process_strong_tasks(new SubTasksDone(GCH_PS_NumElements)), |
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_full_collections_completed(0) |
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{ |
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assert(policy != NULL, "Sanity check"); |
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if (UseConcMarkSweepGC) { |
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_workers = new FlexibleWorkGang("GC Thread", ParallelGCThreads, |
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/* are_GC_task_threads */true, |
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/* are_ConcurrentGC_threads */false); |
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_workers->initialize_workers(); |
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} else { |
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// Serial GC does not use workers. |
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_workers = NULL; |
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} |
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} |
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jint GenCollectedHeap::initialize() { |
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CollectedHeap::pre_initialize(); |
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||
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// While there are no constraints in the GC code that HeapWordSize |
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// be any particular value, there are multiple other areas in the |
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// system which believe this to be true (e.g. oop->object_size in some |
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// cases incorrectly returns the size in wordSize units rather than |
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// HeapWordSize). |
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guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); |
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// Allocate space for the heap. |
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char* heap_address; |
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ReservedSpace heap_rs; |
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size_t heap_alignment = collector_policy()->heap_alignment(); |
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heap_address = allocate(heap_alignment, &heap_rs); |
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if (!heap_rs.is_reserved()) { |
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vm_shutdown_during_initialization( |
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"Could not reserve enough space for object heap"); |
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return JNI_ENOMEM; |
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} |
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initialize_reserved_region((HeapWord*)heap_rs.base(), (HeapWord*)(heap_rs.base() + heap_rs.size())); |
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_rem_set = collector_policy()->create_rem_set(reserved_region()); |
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set_barrier_set(rem_set()->bs()); |
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ReservedSpace young_rs = heap_rs.first_part(gen_policy()->young_gen_spec()->max_size(), false, false); |
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_young_gen = gen_policy()->young_gen_spec()->init(young_rs, 0, rem_set()); |
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heap_rs = heap_rs.last_part(gen_policy()->young_gen_spec()->max_size()); |
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ReservedSpace old_rs = heap_rs.first_part(gen_policy()->old_gen_spec()->max_size(), false, false); |
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_old_gen = gen_policy()->old_gen_spec()->init(old_rs, 1, rem_set()); |
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clear_incremental_collection_failed(); |
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#if INCLUDE_ALL_GCS |
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// If we are running CMS, create the collector responsible |
139 |
// for collecting the CMS generations. |
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140 |
if (collector_policy()->is_concurrent_mark_sweep_policy()) { |
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bool success = create_cms_collector(); |
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if (!success) return JNI_ENOMEM; |
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} |
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#endif // INCLUDE_ALL_GCS |
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return JNI_OK; |
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} |
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char* GenCollectedHeap::allocate(size_t alignment, |
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ReservedSpace* heap_rs){ |
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// Now figure out the total size. |
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const size_t pageSize = UseLargePages ? os::large_page_size() : os::vm_page_size(); |
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assert(alignment % pageSize == 0, "Must be"); |
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GenerationSpec* young_spec = gen_policy()->young_gen_spec(); |
156 |
GenerationSpec* old_spec = gen_policy()->old_gen_spec(); |
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158 |
// Check for overflow. |
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159 |
size_t total_reserved = young_spec->max_size() + old_spec->max_size(); |
|
160 |
if (total_reserved < young_spec->max_size()) { |
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vm_exit_during_initialization("The size of the object heap + VM data exceeds " |
|
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"the maximum representable size"); |
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} |
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assert(total_reserved % alignment == 0, |
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err_msg("Gen size; total_reserved=" SIZE_FORMAT ", alignment=" |
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SIZE_FORMAT, total_reserved, alignment)); |
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*heap_rs = Universe::reserve_heap(total_reserved, alignment); |
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return heap_rs->base(); |
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} |
171 |
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void GenCollectedHeap::post_initialize() { |
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30152 | 173 |
CollectedHeap::post_initialize(); |
174 |
ref_processing_init(); |
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GenCollectorPolicy *policy = (GenCollectorPolicy *)collector_policy(); |
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guarantee(policy->is_generation_policy(), "Illegal policy type"); |
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assert((_young_gen->kind() == Generation::DefNew) || |
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(_young_gen->kind() == Generation::ParNew), |
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"Wrong youngest generation type"); |
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DefNewGeneration* def_new_gen = (DefNewGeneration*)_young_gen; |
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assert(_old_gen->kind() == Generation::ConcurrentMarkSweep || |
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_old_gen->kind() == Generation::MarkSweepCompact, |
1 | 184 |
"Wrong generation kind"); |
185 |
||
186 |
policy->initialize_size_policy(def_new_gen->eden()->capacity(), |
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187 |
_old_gen->capacity(), |
1 | 188 |
def_new_gen->from()->capacity()); |
189 |
policy->initialize_gc_policy_counters(); |
|
190 |
} |
|
191 |
||
192 |
void GenCollectedHeap::ref_processing_init() { |
|
29200 | 193 |
_young_gen->ref_processor_init(); |
194 |
_old_gen->ref_processor_init(); |
|
1 | 195 |
} |
196 |
||
197 |
size_t GenCollectedHeap::capacity() const { |
|
29200 | 198 |
return _young_gen->capacity() + _old_gen->capacity(); |
1 | 199 |
} |
200 |
||
201 |
size_t GenCollectedHeap::used() const { |
|
29200 | 202 |
return _young_gen->used() + _old_gen->used(); |
1 | 203 |
} |
204 |
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// Save the "used_region" for generations level and lower. |
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void GenCollectedHeap::save_used_regions(int level) { |
30155 | 207 |
assert(level == 0 || level == 1, "Illegal level parameter"); |
29200 | 208 |
if (level == 1) { |
209 |
_old_gen->save_used_region(); |
|
1 | 210 |
} |
29200 | 211 |
_young_gen->save_used_region(); |
1 | 212 |
} |
213 |
||
214 |
size_t GenCollectedHeap::max_capacity() const { |
|
29200 | 215 |
return _young_gen->max_capacity() + _old_gen->max_capacity(); |
1 | 216 |
} |
217 |
||
218 |
// Update the _full_collections_completed counter |
|
219 |
// at the end of a stop-world full GC. |
|
220 |
unsigned int GenCollectedHeap::update_full_collections_completed() { |
|
221 |
MonitorLockerEx ml(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
222 |
assert(_full_collections_completed <= _total_full_collections, |
|
223 |
"Can't complete more collections than were started"); |
|
224 |
_full_collections_completed = _total_full_collections; |
|
225 |
ml.notify_all(); |
|
226 |
return _full_collections_completed; |
|
227 |
} |
|
228 |
||
229 |
// Update the _full_collections_completed counter, as appropriate, |
|
230 |
// at the end of a concurrent GC cycle. Note the conditional update |
|
231 |
// below to allow this method to be called by a concurrent collector |
|
232 |
// without synchronizing in any manner with the VM thread (which |
|
233 |
// may already have initiated a STW full collection "concurrently"). |
|
234 |
unsigned int GenCollectedHeap::update_full_collections_completed(unsigned int count) { |
|
235 |
MonitorLockerEx ml(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
236 |
assert((_full_collections_completed <= _total_full_collections) && |
|
237 |
(count <= _total_full_collections), |
|
238 |
"Can't complete more collections than were started"); |
|
239 |
if (count > _full_collections_completed) { |
|
240 |
_full_collections_completed = count; |
|
241 |
ml.notify_all(); |
|
242 |
} |
|
243 |
return _full_collections_completed; |
|
244 |
} |
|
245 |
||
246 |
||
247 |
#ifndef PRODUCT |
|
248 |
// Override of memory state checking method in CollectedHeap: |
|
249 |
// Some collectors (CMS for example) can't have badHeapWordVal written |
|
250 |
// in the first two words of an object. (For instance , in the case of |
|
251 |
// CMS these words hold state used to synchronize between certain |
|
252 |
// (concurrent) GC steps and direct allocating mutators.) |
|
253 |
// The skip_header_HeapWords() method below, allows us to skip |
|
254 |
// over the requisite number of HeapWord's. Note that (for |
|
255 |
// generational collectors) this means that those many words are |
|
256 |
// skipped in each object, irrespective of the generation in which |
|
257 |
// that object lives. The resultant loss of precision seems to be |
|
258 |
// harmless and the pain of avoiding that imprecision appears somewhat |
|
259 |
// higher than we are prepared to pay for such rudimentary debugging |
|
260 |
// support. |
|
261 |
void GenCollectedHeap::check_for_non_bad_heap_word_value(HeapWord* addr, |
|
262 |
size_t size) { |
|
263 |
if (CheckMemoryInitialization && ZapUnusedHeapArea) { |
|
264 |
// We are asked to check a size in HeapWords, |
|
265 |
// but the memory is mangled in juint words. |
|
266 |
juint* start = (juint*) (addr + skip_header_HeapWords()); |
|
267 |
juint* end = (juint*) (addr + size); |
|
268 |
for (juint* slot = start; slot < end; slot += 1) { |
|
269 |
assert(*slot == badHeapWordVal, |
|
270 |
"Found non badHeapWordValue in pre-allocation check"); |
|
271 |
} |
|
272 |
} |
|
273 |
} |
|
274 |
#endif |
|
275 |
||
276 |
HeapWord* GenCollectedHeap::attempt_allocation(size_t size, |
|
277 |
bool is_tlab, |
|
278 |
bool first_only) { |
|
29200 | 279 |
HeapWord* res = NULL; |
280 |
||
281 |
if (_young_gen->should_allocate(size, is_tlab)) { |
|
282 |
res = _young_gen->allocate(size, is_tlab); |
|
283 |
if (res != NULL || first_only) { |
|
284 |
return res; |
|
1 | 285 |
} |
286 |
} |
|
29200 | 287 |
|
288 |
if (_old_gen->should_allocate(size, is_tlab)) { |
|
289 |
res = _old_gen->allocate(size, is_tlab); |
|
290 |
} |
|
291 |
||
292 |
return res; |
|
1 | 293 |
} |
294 |
||
295 |
HeapWord* GenCollectedHeap::mem_allocate(size_t size, |
|
296 |
bool* gc_overhead_limit_was_exceeded) { |
|
297 |
return collector_policy()->mem_allocate_work(size, |
|
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
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diff
changeset
|
298 |
false /* is_tlab */, |
1 | 299 |
gc_overhead_limit_was_exceeded); |
300 |
} |
|
301 |
||
302 |
bool GenCollectedHeap::must_clear_all_soft_refs() { |
|
303 |
return _gc_cause == GCCause::_last_ditch_collection; |
|
304 |
} |
|
305 |
||
306 |
bool GenCollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
|
5433
c182d4c3039e
6919638: CMS: ExplicitGCInvokesConcurrent misinteracts with gc locker
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diff
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|
307 |
return UseConcMarkSweepGC && |
c182d4c3039e
6919638: CMS: ExplicitGCInvokesConcurrent misinteracts with gc locker
ysr
parents:
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diff
changeset
|
308 |
((cause == GCCause::_gc_locker && GCLockerInvokesConcurrent) || |
c182d4c3039e
6919638: CMS: ExplicitGCInvokesConcurrent misinteracts with gc locker
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changeset
|
309 |
(cause == GCCause::_java_lang_system_gc && ExplicitGCInvokesConcurrent)); |
1 | 310 |
} |
311 |
||
29200 | 312 |
void GenCollectedHeap::collect_generation(Generation* gen, bool full, size_t size, |
313 |
bool is_tlab, bool run_verification, bool clear_soft_refs, |
|
314 |
bool restore_marks_for_biased_locking) { |
|
315 |
// Timer for individual generations. Last argument is false: no CR |
|
316 |
// FIXME: We should try to start the timing earlier to cover more of the GC pause |
|
317 |
// The PrintGCDetails logging starts before we have incremented the GC id. We will do that later |
|
318 |
// so we can assume here that the next GC id is what we want. |
|
319 |
GCTraceTime t1(gen->short_name(), PrintGCDetails, false, NULL, GCId::peek()); |
|
320 |
TraceCollectorStats tcs(gen->counters()); |
|
321 |
TraceMemoryManagerStats tmms(gen->kind(),gc_cause()); |
|
322 |
||
323 |
size_t prev_used = gen->used(); |
|
324 |
gen->stat_record()->invocations++; |
|
325 |
gen->stat_record()->accumulated_time.start(); |
|
326 |
||
327 |
// Must be done anew before each collection because |
|
328 |
// a previous collection will do mangling and will |
|
329 |
// change top of some spaces. |
|
330 |
record_gen_tops_before_GC(); |
|
331 |
||
332 |
if (PrintGC && Verbose) { |
|
333 |
gclog_or_tty->print("level=%d invoke=%d size=" SIZE_FORMAT, |
|
334 |
gen->level(), |
|
335 |
gen->stat_record()->invocations, |
|
336 |
size * HeapWordSize); |
|
337 |
} |
|
338 |
||
339 |
if (run_verification && VerifyBeforeGC) { |
|
340 |
HandleMark hm; // Discard invalid handles created during verification |
|
341 |
Universe::verify(" VerifyBeforeGC:"); |
|
342 |
} |
|
343 |
COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
344 |
||
345 |
if (restore_marks_for_biased_locking) { |
|
346 |
// We perform this mark word preservation work lazily |
|
347 |
// because it's only at this point that we know whether we |
|
348 |
// absolutely have to do it; we want to avoid doing it for |
|
349 |
// scavenge-only collections where it's unnecessary |
|
350 |
BiasedLocking::preserve_marks(); |
|
351 |
} |
|
352 |
||
353 |
// Do collection work |
|
354 |
{ |
|
355 |
// Note on ref discovery: For what appear to be historical reasons, |
|
356 |
// GCH enables and disabled (by enqueing) refs discovery. |
|
357 |
// In the future this should be moved into the generation's |
|
358 |
// collect method so that ref discovery and enqueueing concerns |
|
359 |
// are local to a generation. The collect method could return |
|
360 |
// an appropriate indication in the case that notification on |
|
361 |
// the ref lock was needed. This will make the treatment of |
|
362 |
// weak refs more uniform (and indeed remove such concerns |
|
363 |
// from GCH). XXX |
|
364 |
||
365 |
HandleMark hm; // Discard invalid handles created during gc |
|
366 |
save_marks(); // save marks for all gens |
|
367 |
// We want to discover references, but not process them yet. |
|
368 |
// This mode is disabled in process_discovered_references if the |
|
369 |
// generation does some collection work, or in |
|
370 |
// enqueue_discovered_references if the generation returns |
|
371 |
// without doing any work. |
|
372 |
ReferenceProcessor* rp = gen->ref_processor(); |
|
373 |
// If the discovery of ("weak") refs in this generation is |
|
374 |
// atomic wrt other collectors in this configuration, we |
|
375 |
// are guaranteed to have empty discovered ref lists. |
|
376 |
if (rp->discovery_is_atomic()) { |
|
377 |
rp->enable_discovery(); |
|
378 |
rp->setup_policy(clear_soft_refs); |
|
379 |
} else { |
|
380 |
// collect() below will enable discovery as appropriate |
|
381 |
} |
|
382 |
gen->collect(full, clear_soft_refs, size, is_tlab); |
|
383 |
if (!rp->enqueuing_is_done()) { |
|
384 |
rp->enqueue_discovered_references(); |
|
385 |
} else { |
|
386 |
rp->set_enqueuing_is_done(false); |
|
387 |
} |
|
388 |
rp->verify_no_references_recorded(); |
|
389 |
} |
|
390 |
||
391 |
COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
|
392 |
||
393 |
gen->stat_record()->accumulated_time.stop(); |
|
394 |
||
395 |
update_gc_stats(gen->level(), full); |
|
396 |
||
397 |
if (run_verification && VerifyAfterGC) { |
|
398 |
HandleMark hm; // Discard invalid handles created during verification |
|
399 |
Universe::verify(" VerifyAfterGC:"); |
|
400 |
} |
|
401 |
||
402 |
if (PrintGCDetails) { |
|
403 |
gclog_or_tty->print(":"); |
|
404 |
gen->print_heap_change(prev_used); |
|
405 |
} |
|
406 |
} |
|
407 |
||
408 |
void GenCollectedHeap::do_collection(bool full, |
|
1 | 409 |
bool clear_all_soft_refs, |
410 |
size_t size, |
|
411 |
bool is_tlab, |
|
412 |
int max_level) { |
|
413 |
ResourceMark rm; |
|
414 |
DEBUG_ONLY(Thread* my_thread = Thread::current();) |
|
415 |
||
416 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
|
417 |
assert(my_thread->is_VM_thread() || |
|
418 |
my_thread->is_ConcurrentGC_thread(), |
|
419 |
"incorrect thread type capability"); |
|
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
420 |
assert(Heap_lock->is_locked(), |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
421 |
"the requesting thread should have the Heap_lock"); |
1 | 422 |
guarantee(!is_gc_active(), "collection is not reentrant"); |
423 |
||
424 |
if (GC_locker::check_active_before_gc()) { |
|
425 |
return; // GC is disabled (e.g. JNI GetXXXCritical operation) |
|
426 |
} |
|
427 |
||
5343
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
428 |
const bool do_clear_all_soft_refs = clear_all_soft_refs || |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
429 |
collector_policy()->should_clear_all_soft_refs(); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
430 |
|
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
431 |
ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
95a5c4b89273
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
4641
diff
changeset
|
432 |
|
23854
50f7f89b34e0
8038934: Remove prefix allocated_ from methods and variables in Metaspace
ehelin
parents:
23508
diff
changeset
|
433 |
const size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
1 | 434 |
|
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
435 |
print_heap_before_gc(); |
1 | 436 |
|
437 |
{ |
|
438 |
FlagSetting fl(_is_gc_active, true); |
|
439 |
||
30155 | 440 |
bool complete = full && (max_level == 1 /* old */); |
12630
ddf6ee008138
7166894: Add gc cause to GC logging for all collectors
brutisso
parents:
12379
diff
changeset
|
441 |
const char* gc_cause_prefix = complete ? "Full GC" : "GC"; |
1 | 442 |
TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); |
25350
6423a57e5451
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
24941
diff
changeset
|
443 |
// The PrintGCDetails logging starts before we have incremented the GC id. We will do that later |
6423a57e5451
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
24941
diff
changeset
|
444 |
// so we can assume here that the next GC id is what we want. |
6423a57e5451
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
24941
diff
changeset
|
445 |
GCTraceTime t(GCCauseString(gc_cause_prefix, gc_cause()), PrintGCDetails, false, NULL, GCId::peek()); |
1 | 446 |
|
447 |
gc_prologue(complete); |
|
448 |
increment_total_collections(complete); |
|
449 |
||
450 |
size_t gch_prev_used = used(); |
|
29200 | 451 |
bool run_verification = total_collections() >= VerifyGCStartAt; |
1 | 452 |
|
29200 | 453 |
bool prepared_for_verification = false; |
454 |
int max_level_collected = 0; |
|
455 |
bool old_collects_young = (max_level == 1) && |
|
456 |
full && |
|
457 |
_old_gen->full_collects_younger_generations(); |
|
458 |
if (!old_collects_young && |
|
459 |
_young_gen->should_collect(full, size, is_tlab)) { |
|
460 |
if (run_verification && VerifyGCLevel <= 0 && VerifyBeforeGC) { |
|
461 |
prepare_for_verify(); |
|
462 |
prepared_for_verification = true; |
|
463 |
} |
|
464 |
||
465 |
assert(!_young_gen->performs_in_place_marking(), "No young generation do in place marking"); |
|
466 |
collect_generation(_young_gen, |
|
467 |
full, |
|
468 |
size, |
|
469 |
is_tlab, |
|
470 |
run_verification && VerifyGCLevel <= 0, |
|
471 |
do_clear_all_soft_refs, |
|
472 |
false); |
|
473 |
||
474 |
if (size > 0 && (!is_tlab || _young_gen->supports_tlab_allocation()) && |
|
475 |
size * HeapWordSize <= _young_gen->unsafe_max_alloc_nogc()) { |
|
476 |
// Allocation request was met by young GC. |
|
477 |
size = 0; |
|
27252 | 478 |
} |
1 | 479 |
} |
480 |
||
27252 | 481 |
bool must_restore_marks_for_biased_locking = false; |
482 |
||
29200 | 483 |
if (max_level == 1 && _old_gen->should_collect(full, size, is_tlab)) { |
484 |
if (!complete) { |
|
485 |
// The full_collections increment was missed above. |
|
486 |
increment_total_full_collections(); |
|
487 |
} |
|
27252 | 488 |
|
29200 | 489 |
pre_full_gc_dump(NULL); // do any pre full gc dumps |
27252 | 490 |
|
29200 | 491 |
if (!prepared_for_verification && run_verification && |
492 |
VerifyGCLevel <= 1 && VerifyBeforeGC) { |
|
493 |
prepare_for_verify(); |
|
494 |
} |
|
27252 | 495 |
|
29200 | 496 |
assert(_old_gen->performs_in_place_marking(), "All old generations do in place marking"); |
497 |
collect_generation(_old_gen, |
|
498 |
full, |
|
499 |
size, |
|
500 |
is_tlab, |
|
501 |
run_verification && VerifyGCLevel <= 1, |
|
502 |
do_clear_all_soft_refs, |
|
503 |
true); |
|
27252 | 504 |
|
29200 | 505 |
must_restore_marks_for_biased_locking = true; |
506 |
max_level_collected = 1; |
|
1 | 507 |
} |
508 |
||
509 |
// Update "complete" boolean wrt what actually transpired -- |
|
510 |
// for instance, a promotion failure could have led to |
|
511 |
// a whole heap collection. |
|
30155 | 512 |
complete = complete || (max_level_collected == 1 /* old */); |
1 | 513 |
|
2141
e9a644aaff87
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
2010
diff
changeset
|
514 |
if (complete) { // We did a "major" collection |
18025 | 515 |
// FIXME: See comment at pre_full_gc_dump call |
516 |
post_full_gc_dump(NULL); // do any post full gc dumps |
|
2141
e9a644aaff87
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
2010
diff
changeset
|
517 |
} |
e9a644aaff87
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
2010
diff
changeset
|
518 |
|
1 | 519 |
if (PrintGCDetails) { |
520 |
print_heap_change(gch_prev_used); |
|
521 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
522 |
// Print metaspace info for full GC with PrintGCDetails flag. |
1 | 523 |
if (complete) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
524 |
MetaspaceAux::print_metaspace_change(metadata_prev_used); |
1 | 525 |
} |
526 |
} |
|
527 |
||
29200 | 528 |
// Adjust generation sizes. |
30155 | 529 |
if (max_level_collected == 1 /* old */) { |
29200 | 530 |
_old_gen->compute_new_size(); |
1 | 531 |
} |
29200 | 532 |
_young_gen->compute_new_size(); |
1 | 533 |
|
534 |
if (complete) { |
|
16385
4a05c6d94b04
8005602: NPG: classunloading does not happen while CMS GC with -XX:+CMSClassUnloadingEnabled is used
mgerdin
parents:
15482
diff
changeset
|
535 |
// Delete metaspaces for unloaded class loaders and clean up loader_data graph |
4a05c6d94b04
8005602: NPG: classunloading does not happen while CMS GC with -XX:+CMSClassUnloadingEnabled is used
mgerdin
parents:
15482
diff
changeset
|
536 |
ClassLoaderDataGraph::purge(); |
17109
90e6c31bbbe4
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
17105
diff
changeset
|
537 |
MetaspaceAux::verify_metrics(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
538 |
// Resize the metaspace capacity after full collections |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
539 |
MetaspaceGC::compute_new_size(); |
1 | 540 |
update_full_collections_completed(); |
541 |
} |
|
542 |
||
543 |
// Track memory usage and detect low memory after GC finishes |
|
544 |
MemoryService::track_memory_usage(); |
|
545 |
||
546 |
gc_epilogue(complete); |
|
547 |
||
548 |
if (must_restore_marks_for_biased_locking) { |
|
549 |
BiasedLocking::restore_marks(); |
|
550 |
} |
|
551 |
} |
|
552 |
||
11636
3c07b54482a5
7141200: log some interesting information in ring buffers for crashes
never
parents:
11396
diff
changeset
|
553 |
print_heap_after_gc(); |
1 | 554 |
|
2010
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1893
diff
changeset
|
555 |
#ifdef TRACESPINNING |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1893
diff
changeset
|
556 |
ParallelTaskTerminator::print_termination_counts(); |
c13462bbad17
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
1893
diff
changeset
|
557 |
#endif |
1 | 558 |
} |
559 |
||
560 |
HeapWord* GenCollectedHeap::satisfy_failed_allocation(size_t size, bool is_tlab) { |
|
561 |
return collector_policy()->satisfy_failed_allocation(size, is_tlab); |
|
562 |
} |
|
563 |
||
11396
917d8673b5ef
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
11251
diff
changeset
|
564 |
void GenCollectedHeap::set_par_threads(uint t) { |
30152 | 565 |
assert(t == 0 || !UseSerialGC, "Cannot have parallel threads"); |
566 |
CollectedHeap::set_par_threads(t); |
|
1 | 567 |
} |
568 |
||
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
569 |
#ifdef ASSERT |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
570 |
class AssertNonScavengableClosure: public OopClosure { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
571 |
public: |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
572 |
virtual void do_oop(oop* p) { |
29803 | 573 |
assert(!GenCollectedHeap::heap()->is_in_partial_collection(*p), |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
574 |
"Referent should not be scavengable."); } |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
575 |
virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); } |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
576 |
}; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
577 |
static AssertNonScavengableClosure assert_is_non_scavengable_closure; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
578 |
#endif |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
579 |
|
30868
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
580 |
void GenCollectedHeap::process_roots(StrongRootsScope* scope, |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
581 |
ScanningOption so, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
582 |
OopClosure* strong_roots, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
583 |
OopClosure* weak_roots, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
584 |
CLDClosure* strong_cld_closure, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
585 |
CLDClosure* weak_cld_closure, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
586 |
CodeBlobClosure* code_roots) { |
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
587 |
// General roots. |
29802
d485440c958a
8076225: Move the thread claim parity from SharedHeap to Thread
mgerdin
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29800
diff
changeset
|
588 |
assert(Threads::thread_claim_parity() != 0, "must have called prologue code"); |
29693
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8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
589 |
assert(code_roots != NULL, "code root closure should always be set"); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
590 |
// _n_termination for _process_strong_tasks should be set up stream |
fac175f7a466
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mgerdin
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changeset
|
591 |
// in a method not running in a GC worker. Otherwise the GC worker |
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8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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changeset
|
592 |
// could be trying to change the termination condition while the task |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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parents:
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diff
changeset
|
593 |
// is executing in another GC worker. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
594 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
595 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_ClassLoaderDataGraph_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
596 |
ClassLoaderDataGraph::roots_cld_do(strong_cld_closure, weak_cld_closure); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
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changeset
|
597 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
598 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
599 |
// Some CLDs contained in the thread frames should be considered strong. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
600 |
// Don't process them if they will be processed during the ClassLoaderDataGraph phase. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
601 |
CLDClosure* roots_from_clds_p = (strong_cld_closure != weak_cld_closure) ? strong_cld_closure : NULL; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
602 |
// Only process code roots from thread stacks if we aren't visiting the entire CodeCache anyway |
fac175f7a466
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mgerdin
parents:
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diff
changeset
|
603 |
CodeBlobClosure* roots_from_code_p = (so & SO_AllCodeCache) ? NULL : code_roots; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
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diff
changeset
|
604 |
|
30868
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
605 |
bool is_par = scope->n_threads() > 1; |
30147
af9a41999c6e
8076314: Remove the static instance variable SharedHeap:: _sh
brutisso
parents:
29804
diff
changeset
|
606 |
Threads::possibly_parallel_oops_do(is_par, strong_roots, roots_from_clds_p, roots_from_code_p); |
29693
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8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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changeset
|
607 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
608 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_Universe_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
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diff
changeset
|
609 |
Universe::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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parents:
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changeset
|
610 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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parents:
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changeset
|
611 |
// Global (strong) JNI handles |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
612 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_JNIHandles_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
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parents:
29684
diff
changeset
|
613 |
JNIHandles::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
614 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
615 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
616 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_ObjectSynchronizer_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
617 |
ObjectSynchronizer::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
618 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
619 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_FlatProfiler_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
620 |
FlatProfiler::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
621 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
622 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_Management_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
623 |
Management::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
624 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
625 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_jvmti_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
626 |
JvmtiExport::oops_do(strong_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
627 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
628 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
629 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_SystemDictionary_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
630 |
SystemDictionary::roots_oops_do(strong_roots, weak_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
631 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
632 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
633 |
// All threads execute the following. A specific chunk of buckets |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
634 |
// from the StringTable are the individual tasks. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
635 |
if (weak_roots != NULL) { |
30581
a91d6c47f076
8079275: Remove CollectedHeap::use_parallel_gc_threads
stefank
parents:
30258
diff
changeset
|
636 |
if (is_par) { |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
637 |
StringTable::possibly_parallel_oops_do(weak_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
638 |
} else { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
639 |
StringTable::oops_do(weak_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
640 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
641 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
642 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
643 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_CodeCache_oops_do)) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
644 |
if (so & SO_ScavengeCodeCache) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
645 |
assert(code_roots != NULL, "must supply closure for code cache"); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
646 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
647 |
// We only visit parts of the CodeCache when scavenging. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
648 |
CodeCache::scavenge_root_nmethods_do(code_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
649 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
650 |
if (so & SO_AllCodeCache) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
651 |
assert(code_roots != NULL, "must supply closure for code cache"); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
652 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
653 |
// CMSCollector uses this to do intermediate-strength collections. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
654 |
// We scan the entire code cache, since CodeCache::do_unloading is not called. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
655 |
CodeCache::blobs_do(code_roots); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
656 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
657 |
// Verify that the code cache contents are not subject to |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
658 |
// movement by a scavenging collection. |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
659 |
DEBUG_ONLY(CodeBlobToOopClosure assert_code_is_non_scavengable(&assert_is_non_scavengable_closure, !CodeBlobToOopClosure::FixRelocations)); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
660 |
DEBUG_ONLY(CodeCache::asserted_non_scavengable_nmethods_do(&assert_code_is_non_scavengable)); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
661 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
662 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
663 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
664 |
|
30868
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
665 |
void GenCollectedHeap::gen_process_roots(StrongRootsScope* scope, |
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
666 |
int level, |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
667 |
bool younger_gens_as_roots, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
668 |
ScanningOption so, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
669 |
bool only_strong_roots, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
670 |
OopsInGenClosure* not_older_gens, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
671 |
OopsInGenClosure* older_gens, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
672 |
CLDClosure* cld_closure) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
673 |
const bool is_adjust_phase = !only_strong_roots && !younger_gens_as_roots; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
674 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
675 |
bool is_moving_collection = false; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
676 |
if (level == 0 || is_adjust_phase) { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
677 |
// young collections are always moving |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
678 |
is_moving_collection = true; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
679 |
} |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
680 |
|
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
681 |
MarkingCodeBlobClosure mark_code_closure(not_older_gens, is_moving_collection); |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
682 |
OopsInGenClosure* weak_roots = only_strong_roots ? NULL : not_older_gens; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
683 |
CLDClosure* weak_cld_closure = only_strong_roots ? NULL : cld_closure; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
684 |
|
30868
c1b24f26deed
8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
stefank
parents:
30867
diff
changeset
|
685 |
process_roots(scope, so, |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
686 |
not_older_gens, weak_roots, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
687 |
cld_closure, weak_cld_closure, |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
688 |
&mark_code_closure); |
1 | 689 |
|
690 |
if (younger_gens_as_roots) { |
|
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
691 |
if (!_process_strong_tasks->is_task_claimed(GCH_PS_younger_gens)) { |
29200 | 692 |
if (level == 1) { |
693 |
not_older_gens->set_generation(_young_gen); |
|
694 |
_young_gen->oop_iterate(not_older_gens); |
|
1 | 695 |
} |
696 |
not_older_gens->reset_generation(); |
|
697 |
} |
|
698 |
} |
|
699 |
// When collection is parallel, all threads get to cooperate to do |
|
700 |
// older-gen scanning. |
|
29200 | 701 |
if (level == 0) { |
702 |
older_gens->set_generation(_old_gen); |
|
703 |
rem_set()->younger_refs_iterate(_old_gen, older_gens); |
|
1 | 704 |
older_gens->reset_generation(); |
705 |
} |
|
706 |
||
30869 | 707 |
_process_strong_tasks->all_tasks_completed(scope->n_threads()); |
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
708 |
} |
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
709 |
|
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
710 |
|
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
711 |
class AlwaysTrueClosure: public BoolObjectClosure { |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
712 |
public: |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
713 |
bool do_object_b(oop p) { return true; } |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
714 |
}; |
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
715 |
static AlwaysTrueClosure always_true; |
1 | 716 |
|
22882
195c8f70d605
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
22552
diff
changeset
|
717 |
void GenCollectedHeap::gen_process_weak_roots(OopClosure* root_closure) { |
29693
fac175f7a466
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
29684
diff
changeset
|
718 |
JNIHandles::weak_oops_do(&always_true, root_closure); |
29200 | 719 |
_young_gen->ref_processor()->weak_oops_do(root_closure); |
720 |
_old_gen->ref_processor()->weak_oops_do(root_closure); |
|
1 | 721 |
} |
722 |
||
723 |
#define GCH_SINCE_SAVE_MARKS_ITERATE_DEFN(OopClosureType, nv_suffix) \ |
|
724 |
void GenCollectedHeap:: \ |
|
725 |
oop_since_save_marks_iterate(int level, \ |
|
726 |
OopClosureType* cur, \ |
|
727 |
OopClosureType* older) { \ |
|
29200 | 728 |
if (level == 0) { \ |
729 |
_young_gen->oop_since_save_marks_iterate##nv_suffix(cur); \ |
|
730 |
_old_gen->oop_since_save_marks_iterate##nv_suffix(older); \ |
|
731 |
} else { \ |
|
732 |
_old_gen->oop_since_save_marks_iterate##nv_suffix(cur); \ |
|
1 | 733 |
} \ |
734 |
} |
|
735 |
||
736 |
ALL_SINCE_SAVE_MARKS_CLOSURES(GCH_SINCE_SAVE_MARKS_ITERATE_DEFN) |
|
737 |
||
738 |
#undef GCH_SINCE_SAVE_MARKS_ITERATE_DEFN |
|
739 |
||
740 |
bool GenCollectedHeap::no_allocs_since_save_marks(int level) { |
|
29200 | 741 |
if (level == 0 && !_young_gen->no_allocs_since_save_marks()) { |
742 |
return false; |
|
1 | 743 |
} |
29200 | 744 |
return _old_gen->no_allocs_since_save_marks(); |
1 | 745 |
} |
746 |
||
747 |
bool GenCollectedHeap::supports_inline_contig_alloc() const { |
|
29200 | 748 |
return _young_gen->supports_inline_contig_alloc(); |
1 | 749 |
} |
750 |
||
751 |
HeapWord** GenCollectedHeap::top_addr() const { |
|
29200 | 752 |
return _young_gen->top_addr(); |
1 | 753 |
} |
754 |
||
755 |
HeapWord** GenCollectedHeap::end_addr() const { |
|
29200 | 756 |
return _young_gen->end_addr(); |
1 | 757 |
} |
758 |
||
759 |
// public collection interfaces |
|
760 |
||
761 |
void GenCollectedHeap::collect(GCCause::Cause cause) { |
|
762 |
if (should_do_concurrent_full_gc(cause)) { |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
763 |
#if INCLUDE_ALL_GCS |
1 | 764 |
// mostly concurrent full collection |
765 |
collect_mostly_concurrent(cause); |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
766 |
#else // INCLUDE_ALL_GCS |
1 | 767 |
ShouldNotReachHere(); |
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
768 |
#endif // INCLUDE_ALL_GCS |
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
769 |
} else if (cause == GCCause::_wb_young_gc) { |
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
770 |
// minor collection for WhiteBox API |
30155 | 771 |
collect(cause, 0 /* young */); |
1 | 772 |
} else { |
773 |
#ifdef ASSERT |
|
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
774 |
if (cause == GCCause::_scavenge_alot) { |
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
775 |
// minor collection only |
30155 | 776 |
collect(cause, 0 /* young */); |
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
777 |
} else { |
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
778 |
// Stop-the-world full collection |
30155 | 779 |
collect(cause, 1 /* old */); |
26183
bbe259d3c8bc
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
parents:
25730
diff
changeset
|
780 |
} |
1 | 781 |
#else |
782 |
// Stop-the-world full collection |
|
30155 | 783 |
collect(cause, 1 /* old */); |
1 | 784 |
#endif |
785 |
} |
|
786 |
} |
|
787 |
||
788 |
void GenCollectedHeap::collect(GCCause::Cause cause, int max_level) { |
|
789 |
// The caller doesn't have the Heap_lock |
|
790 |
assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
|
791 |
MutexLocker ml(Heap_lock); |
|
792 |
collect_locked(cause, max_level); |
|
793 |
} |
|
794 |
||
795 |
void GenCollectedHeap::collect_locked(GCCause::Cause cause) { |
|
796 |
// The caller has the Heap_lock |
|
797 |
assert(Heap_lock->owned_by_self(), "this thread should own the Heap_lock"); |
|
30155 | 798 |
collect_locked(cause, 1 /* old */); |
1 | 799 |
} |
800 |
||
801 |
// this is the private collection interface |
|
802 |
// The Heap_lock is expected to be held on entry. |
|
803 |
||
804 |
void GenCollectedHeap::collect_locked(GCCause::Cause cause, int max_level) { |
|
805 |
// Read the GC count while holding the Heap_lock |
|
806 |
unsigned int gc_count_before = total_collections(); |
|
807 |
unsigned int full_gc_count_before = total_full_collections(); |
|
808 |
{ |
|
809 |
MutexUnlocker mu(Heap_lock); // give up heap lock, execute gets it back |
|
810 |
VM_GenCollectFull op(gc_count_before, full_gc_count_before, |
|
811 |
cause, max_level); |
|
812 |
VMThread::execute(&op); |
|
813 |
} |
|
814 |
} |
|
815 |
||
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
816 |
#if INCLUDE_ALL_GCS |
1 | 817 |
bool GenCollectedHeap::create_cms_collector() { |
818 |
||
29200 | 819 |
assert(_old_gen->kind() == Generation::ConcurrentMarkSweep, |
1 | 820 |
"Unexpected generation kinds"); |
821 |
// Skip two header words in the block content verification |
|
822 |
NOT_PRODUCT(_skip_header_HeapWords = CMSCollector::skip_header_HeapWords();) |
|
823 |
CMSCollector* collector = new CMSCollector( |
|
29200 | 824 |
(ConcurrentMarkSweepGeneration*)_old_gen, |
1 | 825 |
_rem_set->as_CardTableRS(), |
826 |
(ConcurrentMarkSweepPolicy*) collector_policy()); |
|
827 |
||
828 |
if (collector == NULL || !collector->completed_initialization()) { |
|
829 |
if (collector) { |
|
830 |
delete collector; // Be nice in embedded situation |
|
831 |
} |
|
832 |
vm_shutdown_during_initialization("Could not create CMS collector"); |
|
833 |
return false; |
|
834 |
} |
|
835 |
return true; // success |
|
836 |
} |
|
837 |
||
838 |
void GenCollectedHeap::collect_mostly_concurrent(GCCause::Cause cause) { |
|
839 |
assert(!Heap_lock->owned_by_self(), "Should not own Heap_lock"); |
|
840 |
||
841 |
MutexLocker ml(Heap_lock); |
|
842 |
// Read the GC counts while holding the Heap_lock |
|
843 |
unsigned int full_gc_count_before = total_full_collections(); |
|
844 |
unsigned int gc_count_before = total_collections(); |
|
845 |
{ |
|
846 |
MutexUnlocker mu(Heap_lock); |
|
847 |
VM_GenCollectFullConcurrent op(gc_count_before, full_gc_count_before, cause); |
|
848 |
VMThread::execute(&op); |
|
849 |
} |
|
850 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
851 |
#endif // INCLUDE_ALL_GCS |
1 | 852 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
853 |
void GenCollectedHeap::do_full_collection(bool clear_all_soft_refs) { |
30155 | 854 |
do_full_collection(clear_all_soft_refs, 1 /* old */); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
855 |
} |
1 | 856 |
|
857 |
void GenCollectedHeap::do_full_collection(bool clear_all_soft_refs, |
|
858 |
int max_level) { |
|
859 |
int local_max_level; |
|
7419
263dd4e89b9d
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
7397
diff
changeset
|
860 |
if (!incremental_collection_will_fail(false /* don't consult_young */) && |
1 | 861 |
gc_cause() == GCCause::_gc_locker) { |
862 |
local_max_level = 0; |
|
863 |
} else { |
|
864 |
local_max_level = max_level; |
|
865 |
} |
|
866 |
||
867 |
do_collection(true /* full */, |
|
868 |
clear_all_soft_refs /* clear_all_soft_refs */, |
|
869 |
0 /* size */, |
|
870 |
false /* is_tlab */, |
|
871 |
local_max_level /* max_level */); |
|
872 |
// Hack XXX FIX ME !!! |
|
873 |
// A scavenge may not have been attempted, or may have |
|
874 |
// been attempted and failed, because the old gen was too full |
|
875 |
if (local_max_level == 0 && gc_cause() == GCCause::_gc_locker && |
|
7419
263dd4e89b9d
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
ysr
parents:
7397
diff
changeset
|
876 |
incremental_collection_will_fail(false /* don't consult_young */)) { |
1 | 877 |
if (PrintGCDetails) { |
878 |
gclog_or_tty->print_cr("GC locker: Trying a full collection " |
|
879 |
"because scavenge failed"); |
|
880 |
} |
|
881 |
// This time allow the old gen to be collected as well |
|
882 |
do_collection(true /* full */, |
|
883 |
clear_all_soft_refs /* clear_all_soft_refs */, |
|
884 |
0 /* size */, |
|
885 |
false /* is_tlab */, |
|
30155 | 886 |
1 /* old */ /* max_level */); |
1 | 887 |
} |
888 |
} |
|
889 |
||
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
890 |
bool GenCollectedHeap::is_in_young(oop p) { |
29200 | 891 |
bool result = ((HeapWord*)p) < _old_gen->reserved().start(); |
892 |
assert(result == _young_gen->is_in_reserved(p), |
|
24424
2658d7834c6e
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
24353
diff
changeset
|
893 |
err_msg("incorrect test - result=%d, p=" INTPTR_FORMAT, result, p2i((void*)p))); |
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
894 |
return result; |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
895 |
} |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
896 |
|
11247 | 897 |
// Returns "TRUE" iff "p" points into the committed areas of the heap. |
1 | 898 |
bool GenCollectedHeap::is_in(const void* p) const { |
29200 | 899 |
return _young_gen->is_in(p) || _old_gen->is_in(p); |
1 | 900 |
} |
901 |
||
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
902 |
#ifdef ASSERT |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
903 |
// Don't implement this by using is_in_young(). This method is used |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
904 |
// in some cases to check that is_in_young() is correct. |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
905 |
bool GenCollectedHeap::is_in_partial_collection(const void* p) { |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
906 |
assert(is_in_reserved(p) || p == NULL, |
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
907 |
"Does not work if address is non-null and outside of the heap"); |
29200 | 908 |
return p < _young_gen->reserved().end() && p != NULL; |
1 | 909 |
} |
9935
51267b5e1a3d
7041789: 30% perf regression with c2/arm following 7017732
jmasa
parents:
9623
diff
changeset
|
910 |
#endif |
1 | 911 |
|
30152 | 912 |
void GenCollectedHeap::oop_iterate_no_header(OopClosure* cl) { |
913 |
NoHeaderExtendedOopClosure no_header_cl(cl); |
|
914 |
oop_iterate(&no_header_cl); |
|
915 |
} |
|
916 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
917 |
void GenCollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
29200 | 918 |
_young_gen->oop_iterate(cl); |
919 |
_old_gen->oop_iterate(cl); |
|
1 | 920 |
} |
921 |
||
922 |
void GenCollectedHeap::object_iterate(ObjectClosure* cl) { |
|
29200 | 923 |
_young_gen->object_iterate(cl); |
924 |
_old_gen->object_iterate(cl); |
|
1 | 925 |
} |
926 |
||
1893
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1610
diff
changeset
|
927 |
void GenCollectedHeap::safe_object_iterate(ObjectClosure* cl) { |
29200 | 928 |
_young_gen->safe_object_iterate(cl); |
929 |
_old_gen->safe_object_iterate(cl); |
|
1893
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1610
diff
changeset
|
930 |
} |
c82e388e17c5
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
1610
diff
changeset
|
931 |
|
1 | 932 |
Space* GenCollectedHeap::space_containing(const void* addr) const { |
29200 | 933 |
Space* res = _young_gen->space_containing(addr); |
934 |
if (res != NULL) { |
|
935 |
return res; |
|
1 | 936 |
} |
29200 | 937 |
res = _old_gen->space_containing(addr); |
938 |
assert(res != NULL, "Could not find containing space"); |
|
939 |
return res; |
|
1 | 940 |
} |
941 |
||
942 |
HeapWord* GenCollectedHeap::block_start(const void* addr) const { |
|
943 |
assert(is_in_reserved(addr), "block_start of address outside of heap"); |
|
29200 | 944 |
if (_young_gen->is_in_reserved(addr)) { |
945 |
assert(_young_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
946 |
return _young_gen->block_start(addr); |
|
1 | 947 |
} |
29200 | 948 |
|
949 |
assert(_old_gen->is_in_reserved(addr), "Some generation should contain the address"); |
|
950 |
assert(_old_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
951 |
return _old_gen->block_start(addr); |
|
1 | 952 |
} |
953 |
||
954 |
size_t GenCollectedHeap::block_size(const HeapWord* addr) const { |
|
955 |
assert(is_in_reserved(addr), "block_size of address outside of heap"); |
|
29200 | 956 |
if (_young_gen->is_in_reserved(addr)) { |
957 |
assert(_young_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
958 |
return _young_gen->block_size(addr); |
|
1 | 959 |
} |
29200 | 960 |
|
961 |
assert(_old_gen->is_in_reserved(addr), "Some generation should contain the address"); |
|
962 |
assert(_old_gen->is_in(addr), "addr should be in allocated part of generation"); |
|
963 |
return _old_gen->block_size(addr); |
|
1 | 964 |
} |
965 |
||
966 |
bool GenCollectedHeap::block_is_obj(const HeapWord* addr) const { |
|
967 |
assert(is_in_reserved(addr), "block_is_obj of address outside of heap"); |
|
968 |
assert(block_start(addr) == addr, "addr must be a block start"); |
|
29200 | 969 |
if (_young_gen->is_in_reserved(addr)) { |
970 |
return _young_gen->block_is_obj(addr); |
|
1 | 971 |
} |
29200 | 972 |
|
973 |
assert(_old_gen->is_in_reserved(addr), "Some generation should contain the address"); |
|
974 |
return _old_gen->block_is_obj(addr); |
|
1 | 975 |
} |
976 |
||
977 |
bool GenCollectedHeap::supports_tlab_allocation() const { |
|
29200 | 978 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
979 |
return _young_gen->supports_tlab_allocation(); |
|
1 | 980 |
} |
981 |
||
982 |
size_t GenCollectedHeap::tlab_capacity(Thread* thr) const { |
|
29200 | 983 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
984 |
if (_young_gen->supports_tlab_allocation()) { |
|
985 |
return _young_gen->tlab_capacity(); |
|
1 | 986 |
} |
29200 | 987 |
return 0; |
1 | 988 |
} |
989 |
||
22552 | 990 |
size_t GenCollectedHeap::tlab_used(Thread* thr) const { |
29200 | 991 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
992 |
if (_young_gen->supports_tlab_allocation()) { |
|
993 |
return _young_gen->tlab_used(); |
|
22552 | 994 |
} |
29200 | 995 |
return 0; |
22552 | 996 |
} |
997 |
||
1 | 998 |
size_t GenCollectedHeap::unsafe_max_tlab_alloc(Thread* thr) const { |
29200 | 999 |
assert(!_old_gen->supports_tlab_allocation(), "Old gen supports TLAB allocation?!"); |
1000 |
if (_young_gen->supports_tlab_allocation()) { |
|
1001 |
return _young_gen->unsafe_max_tlab_alloc(); |
|
1 | 1002 |
} |
29200 | 1003 |
return 0; |
1 | 1004 |
} |
1005 |
||
1006 |
HeapWord* GenCollectedHeap::allocate_new_tlab(size_t size) { |
|
1007 |
bool gc_overhead_limit_was_exceeded; |
|
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
1008 |
return collector_policy()->mem_allocate_work(size /* size */, |
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
1009 |
true /* is_tlab */, |
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
1010 |
&gc_overhead_limit_was_exceeded); |
1 | 1011 |
} |
1012 |
||
1013 |
// Requires "*prev_ptr" to be non-NULL. Deletes and a block of minimal size |
|
1014 |
// from the list headed by "*prev_ptr". |
|
1015 |
static ScratchBlock *removeSmallestScratch(ScratchBlock **prev_ptr) { |
|
1016 |
bool first = true; |
|
1017 |
size_t min_size = 0; // "first" makes this conceptually infinite. |
|
1018 |
ScratchBlock **smallest_ptr, *smallest; |
|
1019 |
ScratchBlock *cur = *prev_ptr; |
|
1020 |
while (cur) { |
|
1021 |
assert(*prev_ptr == cur, "just checking"); |
|
1022 |
if (first || cur->num_words < min_size) { |
|
1023 |
smallest_ptr = prev_ptr; |
|
1024 |
smallest = cur; |
|
1025 |
min_size = smallest->num_words; |
|
1026 |
first = false; |
|
1027 |
} |
|
1028 |
prev_ptr = &cur->next; |
|
1029 |
cur = cur->next; |
|
1030 |
} |
|
1031 |
smallest = *smallest_ptr; |
|
1032 |
*smallest_ptr = smallest->next; |
|
1033 |
return smallest; |
|
1034 |
} |
|
1035 |
||
1036 |
// Sort the scratch block list headed by res into decreasing size order, |
|
1037 |
// and set "res" to the result. |
|
1038 |
static void sort_scratch_list(ScratchBlock*& list) { |
|
1039 |
ScratchBlock* sorted = NULL; |
|
1040 |
ScratchBlock* unsorted = list; |
|
1041 |
while (unsorted) { |
|
1042 |
ScratchBlock *smallest = removeSmallestScratch(&unsorted); |
|
1043 |
smallest->next = sorted; |
|
1044 |
sorted = smallest; |
|
1045 |
} |
|
1046 |
list = sorted; |
|
1047 |
} |
|
1048 |
||
1049 |
ScratchBlock* GenCollectedHeap::gather_scratch(Generation* requestor, |
|
1050 |
size_t max_alloc_words) { |
|
1051 |
ScratchBlock* res = NULL; |
|
29200 | 1052 |
_young_gen->contribute_scratch(res, requestor, max_alloc_words); |
1053 |
_old_gen->contribute_scratch(res, requestor, max_alloc_words); |
|
1 | 1054 |
sort_scratch_list(res); |
1055 |
return res; |
|
1056 |
} |
|
1057 |
||
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1058 |
void GenCollectedHeap::release_scratch() { |
29200 | 1059 |
_young_gen->reset_scratch(); |
1060 |
_old_gen->reset_scratch(); |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1061 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1062 |
|
1 | 1063 |
class GenPrepareForVerifyClosure: public GenCollectedHeap::GenClosure { |
1064 |
void do_generation(Generation* gen) { |
|
1065 |
gen->prepare_for_verify(); |
|
1066 |
} |
|
1067 |
}; |
|
1068 |
||
1069 |
void GenCollectedHeap::prepare_for_verify() { |
|
1070 |
ensure_parsability(false); // no need to retire TLABs |
|
1071 |
GenPrepareForVerifyClosure blk; |
|
1072 |
generation_iterate(&blk, false); |
|
1073 |
} |
|
1074 |
||
1075 |
void GenCollectedHeap::generation_iterate(GenClosure* cl, |
|
1076 |
bool old_to_young) { |
|
1077 |
if (old_to_young) { |
|
29200 | 1078 |
cl->do_generation(_old_gen); |
1079 |
cl->do_generation(_young_gen); |
|
1 | 1080 |
} else { |
29200 | 1081 |
cl->do_generation(_young_gen); |
1082 |
cl->do_generation(_old_gen); |
|
1 | 1083 |
} |
1084 |
} |
|
1085 |
||
1086 |
bool GenCollectedHeap::is_maximal_no_gc() const { |
|
29200 | 1087 |
return _young_gen->is_maximal_no_gc() && _old_gen->is_maximal_no_gc(); |
1 | 1088 |
} |
1089 |
||
1090 |
void GenCollectedHeap::save_marks() { |
|
29200 | 1091 |
_young_gen->save_marks(); |
1092 |
_old_gen->save_marks(); |
|
1 | 1093 |
} |
1094 |
||
1095 |
GenCollectedHeap* GenCollectedHeap::heap() { |
|
30258
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1096 |
CollectedHeap* heap = Universe::heap(); |
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1097 |
assert(heap != NULL, "Uninitialized access to GenCollectedHeap::heap()"); |
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1098 |
assert(heap->kind() == CollectedHeap::GenCollectedHeap, "Not a GenCollectedHeap"); |
413e15d1b146
8077415: Remove duplicate variables holding the CollectedHeap
pliden
parents:
30177
diff
changeset
|
1099 |
return (GenCollectedHeap*)heap; |
1 | 1100 |
} |
1101 |
||
1102 |
void GenCollectedHeap::prepare_for_compaction() { |
|
1103 |
// Start by compacting into same gen. |
|
29200 | 1104 |
CompactPoint cp(_old_gen); |
1105 |
_old_gen->prepare_for_compaction(&cp); |
|
1106 |
_young_gen->prepare_for_compaction(&cp); |
|
1 | 1107 |
} |
1108 |
||
1109 |
GCStats* GenCollectedHeap::gc_stats(int level) const { |
|
29200 | 1110 |
if (level == 0) { |
1111 |
return _young_gen->gc_stats(); |
|
1112 |
} else { |
|
1113 |
return _old_gen->gc_stats(); |
|
1114 |
} |
|
1 | 1115 |
} |
1116 |
||
12379 | 1117 |
void GenCollectedHeap::verify(bool silent, VerifyOption option /* ignored */) { |
29200 | 1118 |
if (!silent) { |
1119 |
gclog_or_tty->print("%s", _old_gen->name()); |
|
1120 |
gclog_or_tty->print(" "); |
|
1 | 1121 |
} |
29200 | 1122 |
_old_gen->verify(); |
1123 |
||
1124 |
if (!silent) { |
|
1125 |
gclog_or_tty->print("%s", _young_gen->name()); |
|
1126 |
gclog_or_tty->print(" "); |
|
1127 |
} |
|
1128 |
_young_gen->verify(); |
|
1129 |
||
1 | 1130 |
if (!silent) { |
1131 |
gclog_or_tty->print("remset "); |
|
1132 |
} |
|
1133 |
rem_set()->verify(); |
|
1134 |
} |
|
1135 |
||
1136 |
void GenCollectedHeap::print_on(outputStream* st) const { |
|
29200 | 1137 |
_young_gen->print_on(st); |
1138 |
_old_gen->print_on(st); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
1139 |
MetaspaceAux::print_on(st); |
1 | 1140 |
} |
1141 |
||
1142 |
void GenCollectedHeap::gc_threads_do(ThreadClosure* tc) const { |
|
1143 |
if (workers() != NULL) { |
|
1144 |
workers()->threads_do(tc); |
|
1145 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1146 |
#if INCLUDE_ALL_GCS |
1 | 1147 |
if (UseConcMarkSweepGC) { |
1148 |
ConcurrentMarkSweepThread::threads_do(tc); |
|
1149 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1150 |
#endif // INCLUDE_ALL_GCS |
1 | 1151 |
} |
1152 |
||
1153 |
void GenCollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1154 |
#if INCLUDE_ALL_GCS |
27898
813ad96387b3
8065972: Remove support for ParNew+SerialOld and DefNew+CMS
brutisso
parents:
27887
diff
changeset
|
1155 |
if (UseConcMarkSweepGC) { |
1 | 1156 |
workers()->print_worker_threads_on(st); |
1157 |
ConcurrentMarkSweepThread::print_all_on(st); |
|
1158 |
} |
|
15482
470d0b0c09f1
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
14076
diff
changeset
|
1159 |
#endif // INCLUDE_ALL_GCS |
1 | 1160 |
} |
1161 |
||
16685
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1162 |
void GenCollectedHeap::print_on_error(outputStream* st) const { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1163 |
this->CollectedHeap::print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1164 |
|
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1165 |
#if INCLUDE_ALL_GCS |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1166 |
if (UseConcMarkSweepGC) { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1167 |
st->cr(); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1168 |
CMSCollector::print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1169 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1170 |
#endif // INCLUDE_ALL_GCS |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1171 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16680
diff
changeset
|
1172 |
|
1 | 1173 |
void GenCollectedHeap::print_tracing_info() const { |
24941
4ebbe176a7b1
8042298: Remove the names gen0 and gen1 from the GC code
jwilhelm
parents:
24424
diff
changeset
|
1174 |
if (TraceYoungGenTime) { |
29684
a36d90acae41
8057632: Remove auxiliary code used to handle the generations array
jwilhelm
parents:
29200
diff
changeset
|
1175 |
_young_gen->print_summary_info(); |
1 | 1176 |
} |
24941
4ebbe176a7b1
8042298: Remove the names gen0 and gen1 from the GC code
jwilhelm
parents:
24424
diff
changeset
|
1177 |
if (TraceOldGenTime) { |
29684
a36d90acae41
8057632: Remove auxiliary code used to handle the generations array
jwilhelm
parents:
29200
diff
changeset
|
1178 |
_old_gen->print_summary_info(); |
1 | 1179 |
} |
1180 |
} |
|
1181 |
||
1182 |
void GenCollectedHeap::print_heap_change(size_t prev_used) const { |
|
1183 |
if (PrintGCDetails && Verbose) { |
|
1184 |
gclog_or_tty->print(" " SIZE_FORMAT |
|
1185 |
"->" SIZE_FORMAT |
|
1186 |
"(" SIZE_FORMAT ")", |
|
1187 |
prev_used, used(), capacity()); |
|
1188 |
} else { |
|
1189 |
gclog_or_tty->print(" " SIZE_FORMAT "K" |
|
1190 |
"->" SIZE_FORMAT "K" |
|
1191 |
"(" SIZE_FORMAT "K)", |
|
1192 |
prev_used / K, used() / K, capacity() / K); |
|
1193 |
} |
|
1194 |
} |
|
1195 |
||
1196 |
class GenGCPrologueClosure: public GenCollectedHeap::GenClosure { |
|
1197 |
private: |
|
1198 |
bool _full; |
|
1199 |
public: |
|
1200 |
void do_generation(Generation* gen) { |
|
1201 |
gen->gc_prologue(_full); |
|
1202 |
} |
|
1203 |
GenGCPrologueClosure(bool full) : _full(full) {}; |
|
1204 |
}; |
|
1205 |
||
1206 |
void GenCollectedHeap::gc_prologue(bool full) { |
|
1207 |
assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
|
1208 |
||
1209 |
always_do_update_barrier = false; |
|
1210 |
// Fill TLAB's and such |
|
1211 |
CollectedHeap::accumulate_statistics_all_tlabs(); |
|
1212 |
ensure_parsability(true); // retire TLABs |
|
1213 |
||
1214 |
// Walk generations |
|
1215 |
GenGCPrologueClosure blk(full); |
|
1216 |
generation_iterate(&blk, false); // not old-to-young. |
|
1217 |
}; |
|
1218 |
||
1219 |
class GenGCEpilogueClosure: public GenCollectedHeap::GenClosure { |
|
1220 |
private: |
|
1221 |
bool _full; |
|
1222 |
public: |
|
1223 |
void do_generation(Generation* gen) { |
|
1224 |
gen->gc_epilogue(_full); |
|
1225 |
} |
|
1226 |
GenGCEpilogueClosure(bool full) : _full(full) {}; |
|
1227 |
}; |
|
1228 |
||
1229 |
void GenCollectedHeap::gc_epilogue(bool full) { |
|
1230 |
#ifdef COMPILER2 |
|
1231 |
assert(DerivedPointerTable::is_empty(), "derived pointer present"); |
|
1232 |
size_t actual_gap = pointer_delta((HeapWord*) (max_uintx-3), *(end_addr())); |
|
1233 |
guarantee(actual_gap > (size_t)FastAllocateSizeLimit, "inline allocation wraps"); |
|
1234 |
#endif /* COMPILER2 */ |
|
1235 |
||
1236 |
resize_all_tlabs(); |
|
1237 |
||
1238 |
GenGCEpilogueClosure blk(full); |
|
1239 |
generation_iterate(&blk, false); // not old-to-young. |
|
1240 |
||
10022
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1241 |
if (!CleanChunkPoolAsync) { |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1242 |
Chunk::clean_chunk_pool(); |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1243 |
} |
377345fb5fb5
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
9997
diff
changeset
|
1244 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
1245 |
MetaspaceCounters::update_performance_counters(); |
19322
e35f9ed4f081
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
19286
diff
changeset
|
1246 |
CompressedClassSpaceCounters::update_performance_counters(); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
12781
diff
changeset
|
1247 |
|
1 | 1248 |
always_do_update_barrier = UseConcMarkSweepGC; |
1249 |
}; |
|
1250 |
||
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1251 |
#ifndef PRODUCT |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1252 |
class GenGCSaveTopsBeforeGCClosure: public GenCollectedHeap::GenClosure { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1253 |
private: |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1254 |
public: |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1255 |
void do_generation(Generation* gen) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1256 |
gen->record_spaces_top(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1257 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1258 |
}; |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1259 |
|
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1260 |
void GenCollectedHeap::record_gen_tops_before_GC() { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1261 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1262 |
GenGCSaveTopsBeforeGCClosure blk; |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1263 |
generation_iterate(&blk, false); // not old-to-young. |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1264 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1265 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1266 |
#endif // not PRODUCT |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
360
diff
changeset
|
1267 |
|
1 | 1268 |
class GenEnsureParsabilityClosure: public GenCollectedHeap::GenClosure { |
1269 |
public: |
|
1270 |
void do_generation(Generation* gen) { |
|
1271 |
gen->ensure_parsability(); |
|
1272 |
} |
|
1273 |
}; |
|
1274 |
||
1275 |
void GenCollectedHeap::ensure_parsability(bool retire_tlabs) { |
|
1276 |
CollectedHeap::ensure_parsability(retire_tlabs); |
|
1277 |
GenEnsureParsabilityClosure ep_cl; |
|
1278 |
generation_iterate(&ep_cl, false); |
|
1279 |
} |
|
1280 |
||
19286
48394008c803
8022800: Use specific generations rather than generation iteration
brutisso
parents:
18687
diff
changeset
|
1281 |
oop GenCollectedHeap::handle_failed_promotion(Generation* old_gen, |
1 | 1282 |
oop obj, |
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
1283 |
size_t obj_size) { |
19286
48394008c803
8022800: Use specific generations rather than generation iteration
brutisso
parents:
18687
diff
changeset
|
1284 |
guarantee(old_gen->level() == 1, "We only get here with an old generation"); |
1 | 1285 |
assert(obj_size == (size_t)obj->size(), "bad obj_size passed in"); |
1286 |
HeapWord* result = NULL; |
|
1287 |
||
19286
48394008c803
8022800: Use specific generations rather than generation iteration
brutisso
parents:
18687
diff
changeset
|
1288 |
result = old_gen->expand_and_allocate(obj_size, false); |
1 | 1289 |
|
1290 |
if (result != NULL) { |
|
1291 |
Copy::aligned_disjoint_words((HeapWord*)obj, result, obj_size); |
|
1292 |
} |
|
1293 |
return oop(result); |
|
1294 |
} |
|
1295 |
||
1296 |
class GenTimeOfLastGCClosure: public GenCollectedHeap::GenClosure { |
|
1297 |
jlong _time; // in ms |
|
1298 |
jlong _now; // in ms |
|
1299 |
||
1300 |
public: |
|
1301 |
GenTimeOfLastGCClosure(jlong now) : _time(now), _now(now) { } |
|
1302 |
||
1303 |
jlong time() { return _time; } |
|
1304 |
||
1305 |
void do_generation(Generation* gen) { |
|
1306 |
_time = MIN2(_time, gen->time_of_last_gc(_now)); |
|
1307 |
} |
|
1308 |
}; |
|
1309 |
||
1310 |
jlong GenCollectedHeap::millis_since_last_gc() { |
|
22551 | 1311 |
// We need a monotonically non-decreasing time in ms but |
11251
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1312 |
// os::javaTimeMillis() does not guarantee monotonicity. |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1313 |
jlong now = os::javaTimeNanos() / NANOSECS_PER_MILLISEC; |
1 | 1314 |
GenTimeOfLastGCClosure tolgc_cl(now); |
1315 |
// iterate over generations getting the oldest |
|
1316 |
// time that a generation was collected |
|
1317 |
generation_iterate(&tolgc_cl, false); |
|
11251
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1318 |
|
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1319 |
// javaTimeNanos() is guaranteed to be monotonically non-decreasing |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1320 |
// provided the underlying platform provides such a time source |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1321 |
// (and it is bug free). So we still have to guard against getting |
e29da6b5622b
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
11247
diff
changeset
|
1322 |
// back a time later than 'now'. |
1 | 1323 |
jlong retVal = now - tolgc_cl.time(); |
1324 |
if (retVal < 0) { |
|
29800
fa5f7a2bf717
8076073: shared: PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC needs to be removed from source files
david
parents:
29794
diff
changeset
|
1325 |
NOT_PRODUCT(warning("time warp: " JLONG_FORMAT, retVal);) |
1 | 1326 |
return 0; |
1327 |
} |
|
1328 |
return retVal; |
|
1329 |
} |