1 /*
   2  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/systemDictionary.hpp"
  27 #include "classfile/vmSymbols.hpp"
  28 #include "gc_implementation/shared/mutableSpace.hpp"
  29 #include "memory/collectorPolicy.hpp"
  30 #include "memory/defNewGeneration.hpp"
  31 #include "memory/genCollectedHeap.hpp"
  32 #include "memory/generation.hpp"
  33 #include "memory/generationSpec.hpp"
  34 #include "memory/heap.hpp"
  35 #include "memory/memRegion.hpp"
  36 #include "memory/tenuredGeneration.hpp"
  37 #include "oops/oop.inline.hpp"
  38 #include "runtime/globals.hpp"
  39 #include "runtime/javaCalls.hpp"
  40 #include "services/classLoadingService.hpp"
  41 #include "services/lowMemoryDetector.hpp"
  42 #include "services/management.hpp"
  43 #include "services/memoryManager.hpp"
  44 #include "services/memoryPool.hpp"
  45 #include "services/memoryService.hpp"
  46 #include "utilities/growableArray.hpp"
  47 #include "utilities/macros.hpp"
  48 #if INCLUDE_ALL_GCS
  49 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp"
  50 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
  51 #include "gc_implementation/parNew/parNewGeneration.hpp"
  52 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
  53 #include "gc_implementation/parallelScavenge/psOldGen.hpp"
  54 #include "gc_implementation/parallelScavenge/psYoungGen.hpp"
  55 #include "services/g1MemoryPool.hpp"
  56 #include "services/psMemoryPool.hpp"
  57 #endif // INCLUDE_ALL_GCS
  58 
  59 GrowableArray<MemoryPool*>* MemoryService::_pools_list =
  60   new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_pools_list_size, true);
  61 GrowableArray<MemoryManager*>* MemoryService::_managers_list =
  62   new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryManager*>(init_managers_list_size, true);
  63 
  64 GCMemoryManager* MemoryService::_minor_gc_manager      = NULL;
  65 GCMemoryManager* MemoryService::_major_gc_manager      = NULL;
  66 MemoryPool*      MemoryService::_code_heap_pool        = NULL;
  67 MemoryPool*      MemoryService::_metaspace_pool        = NULL;
  68 MemoryPool*      MemoryService::_compressed_class_pool = NULL;
  69 
  70 class GcThreadCountClosure: public ThreadClosure {
  71  private:
  72   int _count;
  73  public:
  74   GcThreadCountClosure() : _count(0) {};
  75   void do_thread(Thread* thread);
  76   int count() { return _count; }
  77 };
  78 
  79 void GcThreadCountClosure::do_thread(Thread* thread) {
  80   _count++;
  81 }
  82 
  83 void MemoryService::set_universe_heap(CollectedHeap* heap) {
  84   CollectedHeap::Name kind = heap->kind();
  85   switch (kind) {
  86     case CollectedHeap::GenCollectedHeap : {
  87       add_gen_collected_heap_info(GenCollectedHeap::heap());
  88       break;
  89     }
  90 #if INCLUDE_ALL_GCS
  91     case CollectedHeap::ParallelScavengeHeap : {
  92       add_parallel_scavenge_heap_info(ParallelScavengeHeap::heap());
  93       break;
  94     }
  95     case CollectedHeap::G1CollectedHeap : {
  96       add_g1_heap_info(G1CollectedHeap::heap());
  97       break;
  98     }
  99 #endif // INCLUDE_ALL_GCS
 100     default: {
 101       guarantee(false, "Unrecognized kind of heap");
 102     }
 103   }
 104 
 105   // set the GC thread count
 106   GcThreadCountClosure gctcc;
 107   heap->gc_threads_do(&gctcc);
 108   int count = gctcc.count();
 109   if (count > 0) {
 110     _minor_gc_manager->set_num_gc_threads(count);
 111     _major_gc_manager->set_num_gc_threads(count);
 112   }
 113 
 114   // All memory pools and memory managers are initialized.
 115   //
 116   _minor_gc_manager->initialize_gc_stat_info();
 117   _major_gc_manager->initialize_gc_stat_info();
 118 }
 119 
 120 // Add memory pools for GenCollectedHeap
 121 // This function currently only supports two generations collected heap.
 122 // The collector for GenCollectedHeap will have two memory managers.
 123 void MemoryService::add_gen_collected_heap_info(GenCollectedHeap* heap) {
 124   CollectorPolicy* policy = heap->collector_policy();
 125 
 126   assert(policy->is_two_generation_policy(), "Only support two generations");
 127   guarantee(heap->n_gens() == 2, "Only support two-generation heap");
 128 
 129   TwoGenerationCollectorPolicy* two_gen_policy = policy->as_two_generation_policy();
 130   if (two_gen_policy != NULL) {
 131     GenerationSpec** specs = two_gen_policy->generations();
 132     Generation::Name kind = specs[0]->name();
 133     switch (kind) {
 134       case Generation::DefNew:
 135         _minor_gc_manager = MemoryManager::get_copy_memory_manager();
 136         break;
 137 #if INCLUDE_ALL_GCS
 138       case Generation::ParNew:
 139       case Generation::ASParNew:
 140         _minor_gc_manager = MemoryManager::get_parnew_memory_manager();
 141         break;
 142 #endif // INCLUDE_ALL_GCS
 143       default:
 144         guarantee(false, "Unrecognized generation spec");
 145         break;
 146     }
 147     if (policy->is_mark_sweep_policy()) {
 148       _major_gc_manager = MemoryManager::get_msc_memory_manager();
 149 #if INCLUDE_ALL_GCS
 150     } else if (policy->is_concurrent_mark_sweep_policy()) {
 151       _major_gc_manager = MemoryManager::get_cms_memory_manager();
 152 #endif // INCLUDE_ALL_GCS
 153     } else {
 154       guarantee(false, "Unknown two-gen policy");
 155     }
 156   } else {
 157     guarantee(false, "Non two-gen policy");
 158   }
 159   _managers_list->append(_minor_gc_manager);
 160   _managers_list->append(_major_gc_manager);
 161 
 162   add_generation_memory_pool(heap->get_gen(minor), _major_gc_manager, _minor_gc_manager);
 163   add_generation_memory_pool(heap->get_gen(major), _major_gc_manager);
 164 }
 165 
 166 #if INCLUDE_ALL_GCS
 167 // Add memory pools for ParallelScavengeHeap
 168 // This function currently only supports two generations collected heap.
 169 // The collector for ParallelScavengeHeap will have two memory managers.
 170 void MemoryService::add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap) {
 171   // Two managers to keep statistics about _minor_gc_manager and _major_gc_manager GC.
 172   _minor_gc_manager = MemoryManager::get_psScavenge_memory_manager();
 173   _major_gc_manager = MemoryManager::get_psMarkSweep_memory_manager();
 174   _managers_list->append(_minor_gc_manager);
 175   _managers_list->append(_major_gc_manager);
 176 
 177   add_psYoung_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager);
 178   add_psOld_memory_pool(heap->old_gen(), _major_gc_manager);
 179 }
 180 
 181 void MemoryService::add_g1_heap_info(G1CollectedHeap* g1h) {
 182   assert(UseG1GC, "sanity");
 183 
 184   _minor_gc_manager = MemoryManager::get_g1YoungGen_memory_manager();
 185   _major_gc_manager = MemoryManager::get_g1OldGen_memory_manager();
 186   _managers_list->append(_minor_gc_manager);
 187   _managers_list->append(_major_gc_manager);
 188 
 189   add_g1YoungGen_memory_pool(g1h, _major_gc_manager, _minor_gc_manager);
 190   add_g1OldGen_memory_pool(g1h, _major_gc_manager);
 191 }
 192 #endif // INCLUDE_ALL_GCS
 193 
 194 MemoryPool* MemoryService::add_gen(Generation* gen,
 195                                    const char* name,
 196                                    bool is_heap,
 197                                    bool support_usage_threshold) {
 198 
 199   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 200   GenerationPool* pool = new GenerationPool(gen, name, type, support_usage_threshold);
 201   _pools_list->append(pool);
 202   return (MemoryPool*) pool;
 203 }
 204 
 205 MemoryPool* MemoryService::add_space(ContiguousSpace* space,
 206                                      const char* name,
 207                                      bool is_heap,
 208                                      size_t max_size,
 209                                      bool support_usage_threshold) {
 210   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 211   ContiguousSpacePool* pool = new ContiguousSpacePool(space, name, type, max_size, support_usage_threshold);
 212 
 213   _pools_list->append(pool);
 214   return (MemoryPool*) pool;
 215 }
 216 
 217 MemoryPool* MemoryService::add_survivor_spaces(DefNewGeneration* gen,
 218                                                const char* name,
 219                                                bool is_heap,
 220                                                size_t max_size,
 221                                                bool support_usage_threshold) {
 222   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 223   SurvivorContiguousSpacePool* pool = new SurvivorContiguousSpacePool(gen, name, type, max_size, support_usage_threshold);
 224 
 225   _pools_list->append(pool);
 226   return (MemoryPool*) pool;
 227 }
 228 
 229 #if INCLUDE_ALL_GCS
 230 MemoryPool* MemoryService::add_cms_space(CompactibleFreeListSpace* space,
 231                                          const char* name,
 232                                          bool is_heap,
 233                                          size_t max_size,
 234                                          bool support_usage_threshold) {
 235   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 236   CompactibleFreeListSpacePool* pool = new CompactibleFreeListSpacePool(space, name, type, max_size, support_usage_threshold);
 237   _pools_list->append(pool);
 238   return (MemoryPool*) pool;
 239 }
 240 #endif // INCLUDE_ALL_GCS
 241 
 242 // Add memory pool(s) for one generation
 243 void MemoryService::add_generation_memory_pool(Generation* gen,
 244                                                MemoryManager* major_mgr,
 245                                                MemoryManager* minor_mgr) {
 246   guarantee(gen != NULL, "No generation for memory pool");
 247   Generation::Name kind = gen->kind();
 248   int index = _pools_list->length();
 249 
 250   switch (kind) {
 251     case Generation::DefNew: {
 252       assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
 253       DefNewGeneration* young_gen = (DefNewGeneration*) gen;
 254       // Add a memory pool for each space and young gen doesn't
 255       // support low memory detection as it is expected to get filled up.
 256       MemoryPool* eden = add_space(young_gen->eden(),
 257                                    "Eden Space",
 258                                    true, /* is_heap */
 259                                    young_gen->max_eden_size(),
 260                                    false /* support_usage_threshold */);
 261       MemoryPool* survivor = add_survivor_spaces(young_gen,
 262                                                  "Survivor Space",
 263                                                  true, /* is_heap */
 264                                                  young_gen->max_survivor_size(),
 265                                                  false /* support_usage_threshold */);
 266       break;
 267     }
 268 
 269 #if INCLUDE_ALL_GCS
 270     case Generation::ParNew:
 271     case Generation::ASParNew:
 272     {
 273       assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
 274       // Add a memory pool for each space and young gen doesn't
 275       // support low memory detection as it is expected to get filled up.
 276       ParNewGeneration* parnew_gen = (ParNewGeneration*) gen;
 277       MemoryPool* eden = add_space(parnew_gen->eden(),
 278                                    "Par Eden Space",
 279                                    true /* is_heap */,
 280                                    parnew_gen->max_eden_size(),
 281                                    false /* support_usage_threshold */);
 282       MemoryPool* survivor = add_survivor_spaces(parnew_gen,
 283                                                  "Par Survivor Space",
 284                                                  true, /* is_heap */
 285                                                  parnew_gen->max_survivor_size(),
 286                                                  false /* support_usage_threshold */);
 287 
 288       break;
 289     }
 290 #endif // INCLUDE_ALL_GCS
 291 
 292     case Generation::MarkSweepCompact: {
 293       assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager");
 294       add_gen(gen,
 295               "Tenured Gen",
 296               true, /* is_heap */
 297               true  /* support_usage_threshold */);
 298       break;
 299     }
 300 
 301 #if INCLUDE_ALL_GCS
 302     case Generation::ConcurrentMarkSweep:
 303     case Generation::ASConcurrentMarkSweep:
 304     {
 305       assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager");
 306       ConcurrentMarkSweepGeneration* cms = (ConcurrentMarkSweepGeneration*) gen;
 307       MemoryPool* pool = add_cms_space(cms->cmsSpace(),
 308                                        "CMS Old Gen",
 309                                        true, /* is_heap */
 310                                        cms->reserved().byte_size(),
 311                                        true  /* support_usage_threshold */);
 312       break;
 313     }
 314 #endif // INCLUDE_ALL_GCS
 315 
 316     default:
 317       assert(false, "should not reach here");
 318       // no memory pool added for others
 319       break;
 320   }
 321 
 322   assert(major_mgr != NULL, "Should have at least one manager");
 323   // Link managers and the memory pools together
 324   for (int i = index; i < _pools_list->length(); i++) {
 325     MemoryPool* pool = _pools_list->at(i);
 326     major_mgr->add_pool(pool);
 327     if (minor_mgr != NULL) {
 328       minor_mgr->add_pool(pool);
 329     }
 330   }
 331 }
 332 
 333 
 334 #if INCLUDE_ALL_GCS
 335 void MemoryService::add_psYoung_memory_pool(PSYoungGen* gen, MemoryManager* major_mgr, MemoryManager* minor_mgr) {
 336   assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
 337 
 338   // Add a memory pool for each space and young gen doesn't
 339   // support low memory detection as it is expected to get filled up.
 340   EdenMutableSpacePool* eden = new EdenMutableSpacePool(gen,
 341                                                         gen->eden_space(),
 342                                                         "PS Eden Space",
 343                                                         MemoryPool::Heap,
 344                                                         false /* support_usage_threshold */);
 345 
 346   SurvivorMutableSpacePool* survivor = new SurvivorMutableSpacePool(gen,
 347                                                                     "PS Survivor Space",
 348                                                                     MemoryPool::Heap,
 349                                                                     false /* support_usage_threshold */);
 350 
 351   major_mgr->add_pool(eden);
 352   major_mgr->add_pool(survivor);
 353   minor_mgr->add_pool(eden);
 354   minor_mgr->add_pool(survivor);
 355   _pools_list->append(eden);
 356   _pools_list->append(survivor);
 357 }
 358 
 359 void MemoryService::add_psOld_memory_pool(PSOldGen* gen, MemoryManager* mgr) {
 360   PSGenerationPool* old_gen = new PSGenerationPool(gen,
 361                                                    "PS Old Gen",
 362                                                    MemoryPool::Heap,
 363                                                    true /* support_usage_threshold */);
 364   mgr->add_pool(old_gen);
 365   _pools_list->append(old_gen);
 366 }
 367 
 368 void MemoryService::add_g1YoungGen_memory_pool(G1CollectedHeap* g1h,
 369                                                MemoryManager* major_mgr,
 370                                                MemoryManager* minor_mgr) {
 371   assert(major_mgr != NULL && minor_mgr != NULL, "should have two managers");
 372 
 373   G1EdenPool* eden = new G1EdenPool(g1h);
 374   G1SurvivorPool* survivor = new G1SurvivorPool(g1h);
 375 
 376   major_mgr->add_pool(eden);
 377   major_mgr->add_pool(survivor);
 378   minor_mgr->add_pool(eden);
 379   minor_mgr->add_pool(survivor);
 380   _pools_list->append(eden);
 381   _pools_list->append(survivor);
 382 }
 383 
 384 void MemoryService::add_g1OldGen_memory_pool(G1CollectedHeap* g1h,
 385                                              MemoryManager* mgr) {
 386   assert(mgr != NULL, "should have one manager");
 387 
 388   G1OldGenPool* old_gen = new G1OldGenPool(g1h);
 389   mgr->add_pool(old_gen);
 390   _pools_list->append(old_gen);
 391 }
 392 #endif // INCLUDE_ALL_GCS
 393 
 394 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap) {
 395   _code_heap_pool = new CodeHeapPool(heap,
 396                                      "Code Cache",
 397                                      true /* support_usage_threshold */);
 398   MemoryManager* mgr = MemoryManager::get_code_cache_memory_manager();
 399   mgr->add_pool(_code_heap_pool);
 400 
 401   _pools_list->append(_code_heap_pool);
 402   _managers_list->append(mgr);
 403 }
 404 
 405 void MemoryService::add_metaspace_memory_pools() {
 406   MemoryManager* mgr = MemoryManager::get_metaspace_memory_manager();
 407 
 408   _metaspace_pool = new MetaspacePool();
 409   mgr->add_pool(_metaspace_pool);
 410   _pools_list->append(_metaspace_pool);
 411 
 412   if (UseCompressedClassPointers) {
 413     _compressed_class_pool = new CompressedKlassSpacePool();
 414     mgr->add_pool(_compressed_class_pool);
 415     _pools_list->append(_compressed_class_pool);
 416   }
 417 
 418   _managers_list->append(mgr);
 419 }
 420 
 421 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {
 422   for (int i = 0; i < _managers_list->length(); i++) {
 423     MemoryManager* mgr = _managers_list->at(i);
 424     if (mgr->is_manager(mh)) {
 425       return mgr;
 426     }
 427   }
 428   return NULL;
 429 }
 430 
 431 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {
 432   for (int i = 0; i < _pools_list->length(); i++) {
 433     MemoryPool* pool = _pools_list->at(i);
 434     if (pool->is_pool(ph)) {
 435       return pool;
 436     }
 437   }
 438   return NULL;
 439 }
 440 
 441 void MemoryService::track_memory_usage() {
 442   // Track the peak memory usage
 443   for (int i = 0; i < _pools_list->length(); i++) {
 444     MemoryPool* pool = _pools_list->at(i);
 445     pool->record_peak_memory_usage();
 446   }
 447 
 448   // Detect low memory
 449   LowMemoryDetector::detect_low_memory();
 450 }
 451 
 452 void MemoryService::track_memory_pool_usage(MemoryPool* pool) {
 453   // Track the peak memory usage
 454   pool->record_peak_memory_usage();
 455 
 456   // Detect low memory
 457   if (LowMemoryDetector::is_enabled(pool)) {
 458     LowMemoryDetector::detect_low_memory(pool);
 459   }
 460 }
 461 
 462 void MemoryService::gc_begin(bool fullGC, bool recordGCBeginTime,
 463                              bool recordAccumulatedGCTime,
 464                              bool recordPreGCUsage, bool recordPeakUsage) {
 465 
 466   GCMemoryManager* mgr;
 467   if (fullGC) {
 468     mgr = _major_gc_manager;
 469   } else {
 470     mgr = _minor_gc_manager;
 471   }
 472   assert(mgr->is_gc_memory_manager(), "Sanity check");
 473   mgr->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime);
 474 
 475   // Track the peak memory usage when GC begins
 476   if (recordPeakUsage) {
 477     for (int i = 0; i < _pools_list->length(); i++) {
 478       MemoryPool* pool = _pools_list->at(i);
 479       pool->record_peak_memory_usage();
 480     }
 481   }
 482 }
 483 
 484 void MemoryService::gc_end(bool fullGC, bool recordPostGCUsage,
 485                            bool recordAccumulatedGCTime,
 486                            bool recordGCEndTime, bool countCollection,
 487                            GCCause::Cause cause) {
 488 
 489   GCMemoryManager* mgr;
 490   if (fullGC) {
 491     mgr = (GCMemoryManager*) _major_gc_manager;
 492   } else {
 493     mgr = (GCMemoryManager*) _minor_gc_manager;
 494   }
 495   assert(mgr->is_gc_memory_manager(), "Sanity check");
 496 
 497   // register the GC end statistics and memory usage
 498   mgr->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
 499               countCollection, cause);
 500 }
 501 
 502 void MemoryService::oops_do(OopClosure* f) {
 503   int i;
 504 
 505   for (i = 0; i < _pools_list->length(); i++) {
 506     MemoryPool* pool = _pools_list->at(i);
 507     pool->oops_do(f);
 508   }
 509   for (i = 0; i < _managers_list->length(); i++) {
 510     MemoryManager* mgr = _managers_list->at(i);
 511     mgr->oops_do(f);
 512   }
 513 }
 514 
 515 bool MemoryService::set_verbose(bool verbose) {
 516   MutexLocker m(Management_lock);
 517   // verbose will be set to the previous value
 518   bool succeed = CommandLineFlags::boolAtPut((char*)"PrintGC", &verbose, Flag::MANAGEMENT);
 519   assert(succeed, "Setting PrintGC flag fails");
 520   ClassLoadingService::reset_trace_class_unloading();
 521 
 522   return verbose;
 523 }
 524 
 525 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {
 526   Klass* k = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
 527   instanceKlassHandle ik(THREAD, k);
 528 
 529   instanceHandle obj = ik->allocate_instance_handle(CHECK_NH);
 530 
 531   JavaValue result(T_VOID);
 532   JavaCallArguments args(10);
 533   args.push_oop(obj);                         // receiver
 534   args.push_long(usage.init_size_as_jlong()); // Argument 1
 535   args.push_long(usage.used_as_jlong());      // Argument 2
 536   args.push_long(usage.committed_as_jlong()); // Argument 3
 537   args.push_long(usage.max_size_as_jlong());  // Argument 4
 538 
 539   JavaCalls::call_special(&result,
 540                           ik,
 541                           vmSymbols::object_initializer_name(),
 542                           vmSymbols::long_long_long_long_void_signature(),
 543                           &args,
 544                           CHECK_NH);
 545   return obj;
 546 }
 547 //
 548 // GC manager type depends on the type of Generation. Depending on the space
 549 // availablity and vm options the gc uses major gc manager or minor gc
 550 // manager or both. The type of gc manager depends on the generation kind.
 551 // For DefNew, ParNew and ASParNew generation doing scavenge gc uses minor
 552 // gc manager (so _fullGC is set to false ) and for other generation kinds
 553 // doing mark-sweep-compact uses major gc manager (so _fullGC is set
 554 // to true).
 555 TraceMemoryManagerStats::TraceMemoryManagerStats(Generation::Name kind, GCCause::Cause cause) {
 556   switch (kind) {
 557     case Generation::DefNew:
 558 #if INCLUDE_ALL_GCS
 559     case Generation::ParNew:
 560     case Generation::ASParNew:
 561 #endif // INCLUDE_ALL_GCS
 562       _fullGC=false;
 563       break;
 564     case Generation::MarkSweepCompact:
 565 #if INCLUDE_ALL_GCS
 566     case Generation::ConcurrentMarkSweep:
 567     case Generation::ASConcurrentMarkSweep:
 568 #endif // INCLUDE_ALL_GCS
 569       _fullGC=true;
 570       break;
 571     default:
 572       assert(false, "Unrecognized gc generation kind.");
 573   }
 574   // this has to be called in a stop the world pause and represent
 575   // an entire gc pause, start to finish:
 576   initialize(_fullGC, cause,true, true, true, true, true, true, true);
 577 }
 578 TraceMemoryManagerStats::TraceMemoryManagerStats(bool fullGC,
 579                                                  GCCause::Cause cause,
 580                                                  bool recordGCBeginTime,
 581                                                  bool recordPreGCUsage,
 582                                                  bool recordPeakUsage,
 583                                                  bool recordPostGCUsage,
 584                                                  bool recordAccumulatedGCTime,
 585                                                  bool recordGCEndTime,
 586                                                  bool countCollection) {
 587     initialize(fullGC, cause, recordGCBeginTime, recordPreGCUsage, recordPeakUsage,
 588              recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
 589              countCollection);
 590 }
 591 
 592 // for a subclass to create then initialize an instance before invoking
 593 // the MemoryService
 594 void TraceMemoryManagerStats::initialize(bool fullGC,
 595                                          GCCause::Cause cause,
 596                                          bool recordGCBeginTime,
 597                                          bool recordPreGCUsage,
 598                                          bool recordPeakUsage,
 599                                          bool recordPostGCUsage,
 600                                          bool recordAccumulatedGCTime,
 601                                          bool recordGCEndTime,
 602                                          bool countCollection) {
 603   _fullGC = fullGC;
 604   _recordGCBeginTime = recordGCBeginTime;
 605   _recordPreGCUsage = recordPreGCUsage;
 606   _recordPeakUsage = recordPeakUsage;
 607   _recordPostGCUsage = recordPostGCUsage;
 608   _recordAccumulatedGCTime = recordAccumulatedGCTime;
 609   _recordGCEndTime = recordGCEndTime;
 610   _countCollection = countCollection;
 611   _cause = cause;
 612 
 613   MemoryService::gc_begin(_fullGC, _recordGCBeginTime, _recordAccumulatedGCTime,
 614                           _recordPreGCUsage, _recordPeakUsage);
 615 }
 616 
 617 TraceMemoryManagerStats::~TraceMemoryManagerStats() {
 618   MemoryService::gc_end(_fullGC, _recordPostGCUsage, _recordAccumulatedGCTime,
 619                         _recordGCEndTime, _countCollection, _cause);
 620 }