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 MemoryManager*   MemoryService::_code_cache_manager    = NULL;
  67 GrowableArray<MemoryPool*>* MemoryService::_code_heap_pools =
  68     new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_code_heap_pools_size, true);
  69 MemoryPool*      MemoryService::_metaspace_pool        = NULL;
  70 MemoryPool*      MemoryService::_compressed_class_pool = NULL;
  71 
  72 class GcThreadCountClosure: public ThreadClosure {
  73  private:
  74   int _count;
  75  public:
  76   GcThreadCountClosure() : _count(0) {};
  77   void do_thread(Thread* thread);
  78   int count() { return _count; }
  79 };
  80 
  81 void GcThreadCountClosure::do_thread(Thread* thread) {
  82   _count++;
  83 }
  84 
  85 void MemoryService::set_universe_heap(CollectedHeap* heap) {
  86   CollectedHeap::Name kind = heap->kind();
  87   switch (kind) {
  88     case CollectedHeap::GenCollectedHeap : {
  89       add_gen_collected_heap_info(GenCollectedHeap::heap());
  90       break;
  91     }
  92 #if INCLUDE_ALL_GCS
  93     case CollectedHeap::ParallelScavengeHeap : {
  94       add_parallel_scavenge_heap_info(ParallelScavengeHeap::heap());
  95       break;
  96     }
  97     case CollectedHeap::G1CollectedHeap : {
  98       add_g1_heap_info(G1CollectedHeap::heap());
  99       break;
 100     }
 101 #endif // INCLUDE_ALL_GCS
 102     default: {
 103       guarantee(false, "Unrecognized kind of heap");
 104     }
 105   }
 106 
 107   // set the GC thread count
 108   GcThreadCountClosure gctcc;
 109   heap->gc_threads_do(&gctcc);
 110   int count = gctcc.count();
 111   if (count > 0) {
 112     _minor_gc_manager->set_num_gc_threads(count);
 113     _major_gc_manager->set_num_gc_threads(count);
 114   }
 115 
 116   // All memory pools and memory managers are initialized.
 117   //
 118   _minor_gc_manager->initialize_gc_stat_info();
 119   _major_gc_manager->initialize_gc_stat_info();
 120 }
 121 
 122 // Add memory pools for GenCollectedHeap
 123 // This function currently only supports two generations collected heap.
 124 // The collector for GenCollectedHeap will have two memory managers.
 125 void MemoryService::add_gen_collected_heap_info(GenCollectedHeap* heap) {
 126   CollectorPolicy* policy = heap->collector_policy();
 127 
 128   assert(policy->is_generation_policy(), "Only support two generations");
 129   guarantee(heap->n_gens() == 2, "Only support two-generation heap");
 130 
 131   GenCollectorPolicy* gen_policy = policy->as_generation_policy();
 132   if (gen_policy != NULL) {
 133     GenerationSpec** specs = gen_policy->generations();
 134     Generation::Name kind = specs[0]->name();
 135     switch (kind) {
 136       case Generation::DefNew:
 137         _minor_gc_manager = MemoryManager::get_copy_memory_manager();
 138         break;
 139 #if INCLUDE_ALL_GCS
 140       case Generation::ParNew:
 141         _minor_gc_manager = MemoryManager::get_parnew_memory_manager();
 142         break;
 143 #endif // INCLUDE_ALL_GCS
 144       default:
 145         guarantee(false, "Unrecognized generation spec");
 146         break;
 147     }
 148     if (policy->is_mark_sweep_policy()) {
 149       _major_gc_manager = MemoryManager::get_msc_memory_manager();
 150 #if INCLUDE_ALL_GCS
 151     } else if (policy->is_concurrent_mark_sweep_policy()) {
 152       _major_gc_manager = MemoryManager::get_cms_memory_manager();
 153 #endif // INCLUDE_ALL_GCS
 154     } else {
 155       guarantee(false, "Unknown two-gen policy");
 156     }
 157   } else {
 158     guarantee(false, "Non two-gen policy");
 159   }
 160   _managers_list->append(_minor_gc_manager);
 161   _managers_list->append(_major_gc_manager);
 162 
 163   add_generation_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager);
 164   add_generation_memory_pool(heap->old_gen(), _major_gc_manager);
 165 }
 166 
 167 #if INCLUDE_ALL_GCS
 168 // Add memory pools for ParallelScavengeHeap
 169 // This function currently only supports two generations collected heap.
 170 // The collector for ParallelScavengeHeap will have two memory managers.
 171 void MemoryService::add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap) {
 172   // Two managers to keep statistics about _minor_gc_manager and _major_gc_manager GC.
 173   _minor_gc_manager = MemoryManager::get_psScavenge_memory_manager();
 174   _major_gc_manager = MemoryManager::get_psMarkSweep_memory_manager();
 175   _managers_list->append(_minor_gc_manager);
 176   _managers_list->append(_major_gc_manager);
 177 
 178   add_psYoung_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager);
 179   add_psOld_memory_pool(heap->old_gen(), _major_gc_manager);
 180 }
 181 
 182 void MemoryService::add_g1_heap_info(G1CollectedHeap* g1h) {
 183   assert(UseG1GC, "sanity");
 184 
 185   _minor_gc_manager = MemoryManager::get_g1YoungGen_memory_manager();
 186   _major_gc_manager = MemoryManager::get_g1OldGen_memory_manager();
 187   _managers_list->append(_minor_gc_manager);
 188   _managers_list->append(_major_gc_manager);
 189 
 190   add_g1YoungGen_memory_pool(g1h, _major_gc_manager, _minor_gc_manager);
 191   add_g1OldGen_memory_pool(g1h, _major_gc_manager);
 192 }
 193 #endif // INCLUDE_ALL_GCS
 194 
 195 MemoryPool* MemoryService::add_gen(Generation* gen,
 196                                    const char* name,
 197                                    bool is_heap,
 198                                    bool support_usage_threshold) {
 199 
 200   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 201   GenerationPool* pool = new GenerationPool(gen, name, type, support_usage_threshold);
 202   _pools_list->append(pool);
 203   return (MemoryPool*) pool;
 204 }
 205 
 206 MemoryPool* MemoryService::add_space(ContiguousSpace* space,
 207                                      const char* name,
 208                                      bool is_heap,
 209                                      size_t max_size,
 210                                      bool support_usage_threshold) {
 211   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 212   ContiguousSpacePool* pool = new ContiguousSpacePool(space, name, type, max_size, support_usage_threshold);
 213 
 214   _pools_list->append(pool);
 215   return (MemoryPool*) pool;
 216 }
 217 
 218 MemoryPool* MemoryService::add_survivor_spaces(DefNewGeneration* gen,
 219                                                const char* name,
 220                                                bool is_heap,
 221                                                size_t max_size,
 222                                                bool support_usage_threshold) {
 223   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 224   SurvivorContiguousSpacePool* pool = new SurvivorContiguousSpacePool(gen, name, type, max_size, support_usage_threshold);
 225 
 226   _pools_list->append(pool);
 227   return (MemoryPool*) pool;
 228 }
 229 
 230 #if INCLUDE_ALL_GCS
 231 MemoryPool* MemoryService::add_cms_space(CompactibleFreeListSpace* space,
 232                                          const char* name,
 233                                          bool is_heap,
 234                                          size_t max_size,
 235                                          bool support_usage_threshold) {
 236   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
 237   CompactibleFreeListSpacePool* pool = new CompactibleFreeListSpacePool(space, name, type, max_size, support_usage_threshold);
 238   _pools_list->append(pool);
 239   return (MemoryPool*) pool;
 240 }
 241 #endif // INCLUDE_ALL_GCS
 242 
 243 // Add memory pool(s) for one generation
 244 void MemoryService::add_generation_memory_pool(Generation* gen,
 245                                                MemoryManager* major_mgr,
 246                                                MemoryManager* minor_mgr) {
 247   guarantee(gen != NULL, "No generation for memory pool");
 248   Generation::Name kind = gen->kind();
 249   int index = _pools_list->length();
 250 
 251   switch (kind) {
 252     case Generation::DefNew: {
 253       assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
 254       DefNewGeneration* young_gen = (DefNewGeneration*) gen;
 255       // Add a memory pool for each space and young gen doesn't
 256       // support low memory detection as it is expected to get filled up.
 257       MemoryPool* eden = add_space(young_gen->eden(),
 258                                    "Eden Space",
 259                                    true, /* is_heap */
 260                                    young_gen->max_eden_size(),
 261                                    false /* support_usage_threshold */);
 262       MemoryPool* survivor = add_survivor_spaces(young_gen,
 263                                                  "Survivor Space",
 264                                                  true, /* is_heap */
 265                                                  young_gen->max_survivor_size(),
 266                                                  false /* support_usage_threshold */);
 267       break;
 268     }
 269 
 270 #if INCLUDE_ALL_GCS
 271     case Generation::ParNew:
 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     {
 304       assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager");
 305       ConcurrentMarkSweepGeneration* cms = (ConcurrentMarkSweepGeneration*) gen;
 306       MemoryPool* pool = add_cms_space(cms->cmsSpace(),
 307                                        "CMS Old Gen",
 308                                        true, /* is_heap */
 309                                        cms->reserved().byte_size(),
 310                                        true  /* support_usage_threshold */);
 311       break;
 312     }
 313 #endif // INCLUDE_ALL_GCS
 314 
 315     default:
 316       assert(false, "should not reach here");
 317       // no memory pool added for others
 318       break;
 319   }
 320 
 321   assert(major_mgr != NULL, "Should have at least one manager");
 322   // Link managers and the memory pools together
 323   for (int i = index; i < _pools_list->length(); i++) {
 324     MemoryPool* pool = _pools_list->at(i);
 325     major_mgr->add_pool(pool);
 326     if (minor_mgr != NULL) {
 327       minor_mgr->add_pool(pool);
 328     }
 329   }
 330 }
 331 
 332 
 333 #if INCLUDE_ALL_GCS
 334 void MemoryService::add_psYoung_memory_pool(PSYoungGen* gen, MemoryManager* major_mgr, MemoryManager* minor_mgr) {
 335   assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
 336 
 337   // Add a memory pool for each space and young gen doesn't
 338   // support low memory detection as it is expected to get filled up.
 339   EdenMutableSpacePool* eden = new EdenMutableSpacePool(gen,
 340                                                         gen->eden_space(),
 341                                                         "PS Eden Space",
 342                                                         MemoryPool::Heap,
 343                                                         false /* support_usage_threshold */);
 344 
 345   SurvivorMutableSpacePool* survivor = new SurvivorMutableSpacePool(gen,
 346                                                                     "PS Survivor Space",
 347                                                                     MemoryPool::Heap,
 348                                                                     false /* support_usage_threshold */);
 349 
 350   major_mgr->add_pool(eden);
 351   major_mgr->add_pool(survivor);
 352   minor_mgr->add_pool(eden);
 353   minor_mgr->add_pool(survivor);
 354   _pools_list->append(eden);
 355   _pools_list->append(survivor);
 356 }
 357 
 358 void MemoryService::add_psOld_memory_pool(PSOldGen* gen, MemoryManager* mgr) {
 359   PSGenerationPool* old_gen = new PSGenerationPool(gen,
 360                                                    "PS Old Gen",
 361                                                    MemoryPool::Heap,
 362                                                    true /* support_usage_threshold */);
 363   mgr->add_pool(old_gen);
 364   _pools_list->append(old_gen);
 365 }
 366 
 367 void MemoryService::add_g1YoungGen_memory_pool(G1CollectedHeap* g1h,
 368                                                MemoryManager* major_mgr,
 369                                                MemoryManager* minor_mgr) {
 370   assert(major_mgr != NULL && minor_mgr != NULL, "should have two managers");
 371 
 372   G1EdenPool* eden = new G1EdenPool(g1h);
 373   G1SurvivorPool* survivor = new G1SurvivorPool(g1h);
 374 
 375   major_mgr->add_pool(eden);
 376   major_mgr->add_pool(survivor);
 377   minor_mgr->add_pool(eden);
 378   minor_mgr->add_pool(survivor);
 379   _pools_list->append(eden);
 380   _pools_list->append(survivor);
 381 }
 382 
 383 void MemoryService::add_g1OldGen_memory_pool(G1CollectedHeap* g1h,
 384                                              MemoryManager* mgr) {
 385   assert(mgr != NULL, "should have one manager");
 386 
 387   G1OldGenPool* old_gen = new G1OldGenPool(g1h);
 388   mgr->add_pool(old_gen);
 389   _pools_list->append(old_gen);
 390 }
 391 #endif // INCLUDE_ALL_GCS
 392 
 393 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap, const char* name) {
 394   // Create new memory pool for this heap
 395   MemoryPool* code_heap_pool = new CodeHeapPool(heap, name, true /* support_usage_threshold */);
 396 
 397   // Append to lists
 398   _code_heap_pools->append(code_heap_pool);
 399   _pools_list->append(code_heap_pool);
 400 
 401   if (_code_cache_manager == NULL) {
 402     // Create CodeCache memory manager
 403     _code_cache_manager = MemoryManager::get_code_cache_memory_manager();
 404     _managers_list->append(_code_cache_manager);
 405   }
 406 
 407   _code_cache_manager->add_pool(code_heap_pool);
 408 }
 409 
 410 void MemoryService::add_metaspace_memory_pools() {
 411   MemoryManager* mgr = MemoryManager::get_metaspace_memory_manager();
 412 
 413   _metaspace_pool = new MetaspacePool();
 414   mgr->add_pool(_metaspace_pool);
 415   _pools_list->append(_metaspace_pool);
 416 
 417   if (UseCompressedClassPointers) {
 418     _compressed_class_pool = new CompressedKlassSpacePool();
 419     mgr->add_pool(_compressed_class_pool);
 420     _pools_list->append(_compressed_class_pool);
 421   }
 422 
 423   _managers_list->append(mgr);
 424 }
 425 
 426 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {
 427   for (int i = 0; i < _managers_list->length(); i++) {
 428     MemoryManager* mgr = _managers_list->at(i);
 429     if (mgr->is_manager(mh)) {
 430       return mgr;
 431     }
 432   }
 433   return NULL;
 434 }
 435 
 436 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {
 437   for (int i = 0; i < _pools_list->length(); i++) {
 438     MemoryPool* pool = _pools_list->at(i);
 439     if (pool->is_pool(ph)) {
 440       return pool;
 441     }
 442   }
 443   return NULL;
 444 }
 445 
 446 void MemoryService::track_memory_usage() {
 447   // Track the peak memory usage
 448   for (int i = 0; i < _pools_list->length(); i++) {
 449     MemoryPool* pool = _pools_list->at(i);
 450     pool->record_peak_memory_usage();
 451   }
 452 
 453   // Detect low memory
 454   LowMemoryDetector::detect_low_memory();
 455 }
 456 
 457 void MemoryService::track_memory_pool_usage(MemoryPool* pool) {
 458   // Track the peak memory usage
 459   pool->record_peak_memory_usage();
 460 
 461   // Detect low memory
 462   if (LowMemoryDetector::is_enabled(pool)) {
 463     LowMemoryDetector::detect_low_memory(pool);
 464   }
 465 }
 466 
 467 void MemoryService::gc_begin(bool fullGC, bool recordGCBeginTime,
 468                              bool recordAccumulatedGCTime,
 469                              bool recordPreGCUsage, bool recordPeakUsage) {
 470 
 471   GCMemoryManager* mgr;
 472   if (fullGC) {
 473     mgr = _major_gc_manager;
 474   } else {
 475     mgr = _minor_gc_manager;
 476   }
 477   assert(mgr->is_gc_memory_manager(), "Sanity check");
 478   mgr->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime);
 479 
 480   // Track the peak memory usage when GC begins
 481   if (recordPeakUsage) {
 482     for (int i = 0; i < _pools_list->length(); i++) {
 483       MemoryPool* pool = _pools_list->at(i);
 484       pool->record_peak_memory_usage();
 485     }
 486   }
 487 }
 488 
 489 void MemoryService::gc_end(bool fullGC, bool recordPostGCUsage,
 490                            bool recordAccumulatedGCTime,
 491                            bool recordGCEndTime, bool countCollection,
 492                            GCCause::Cause cause) {
 493 
 494   GCMemoryManager* mgr;
 495   if (fullGC) {
 496     mgr = (GCMemoryManager*) _major_gc_manager;
 497   } else {
 498     mgr = (GCMemoryManager*) _minor_gc_manager;
 499   }
 500   assert(mgr->is_gc_memory_manager(), "Sanity check");
 501 
 502   // register the GC end statistics and memory usage
 503   mgr->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
 504               countCollection, cause);
 505 }
 506 
 507 void MemoryService::oops_do(OopClosure* f) {
 508   int i;
 509 
 510   for (i = 0; i < _pools_list->length(); i++) {
 511     MemoryPool* pool = _pools_list->at(i);
 512     pool->oops_do(f);
 513   }
 514   for (i = 0; i < _managers_list->length(); i++) {
 515     MemoryManager* mgr = _managers_list->at(i);
 516     mgr->oops_do(f);
 517   }
 518 }
 519 
 520 bool MemoryService::set_verbose(bool verbose) {
 521   MutexLocker m(Management_lock);
 522   // verbose will be set to the previous value
 523   bool succeed = CommandLineFlags::boolAtPut((char*)"PrintGC", &verbose, Flag::MANAGEMENT);
 524   assert(succeed, "Setting PrintGC flag fails");
 525   ClassLoadingService::reset_trace_class_unloading();
 526 
 527   return verbose;
 528 }
 529 
 530 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {
 531   Klass* k = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
 532   instanceKlassHandle ik(THREAD, k);
 533 
 534   instanceHandle obj = ik->allocate_instance_handle(CHECK_NH);
 535 
 536   JavaValue result(T_VOID);
 537   JavaCallArguments args(10);
 538   args.push_oop(obj);                         // receiver
 539   args.push_long(usage.init_size_as_jlong()); // Argument 1
 540   args.push_long(usage.used_as_jlong());      // Argument 2
 541   args.push_long(usage.committed_as_jlong()); // Argument 3
 542   args.push_long(usage.max_size_as_jlong());  // Argument 4
 543 
 544   JavaCalls::call_special(&result,
 545                           ik,
 546                           vmSymbols::object_initializer_name(),
 547                           vmSymbols::long_long_long_long_void_signature(),
 548                           &args,
 549                           CHECK_NH);
 550   return obj;
 551 }
 552 //
 553 // GC manager type depends on the type of Generation. Depending on the space
 554 // availablity and vm options the gc uses major gc manager or minor gc
 555 // manager or both. The type of gc manager depends on the generation kind.
 556 // For DefNew and ParNew generation doing scavenge gc uses minor gc manager (so
 557 // _fullGC is set to false ) and for other generation kinds doing
 558 // mark-sweep-compact uses major gc manager (so _fullGC is set to true).
 559 TraceMemoryManagerStats::TraceMemoryManagerStats(Generation::Name kind, GCCause::Cause cause) {
 560   switch (kind) {
 561     case Generation::DefNew:
 562 #if INCLUDE_ALL_GCS
 563     case Generation::ParNew:
 564 #endif // INCLUDE_ALL_GCS
 565       _fullGC=false;
 566       break;
 567     case Generation::MarkSweepCompact:
 568 #if INCLUDE_ALL_GCS
 569     case Generation::ConcurrentMarkSweep:
 570 #endif // INCLUDE_ALL_GCS
 571       _fullGC=true;
 572       break;
 573     default:
 574       assert(false, "Unrecognized gc generation kind.");
 575   }
 576   // this has to be called in a stop the world pause and represent
 577   // an entire gc pause, start to finish:
 578   initialize(_fullGC, cause,true, true, true, true, true, true, true);
 579 }
 580 TraceMemoryManagerStats::TraceMemoryManagerStats(bool fullGC,
 581                                                  GCCause::Cause cause,
 582                                                  bool recordGCBeginTime,
 583                                                  bool recordPreGCUsage,
 584                                                  bool recordPeakUsage,
 585                                                  bool recordPostGCUsage,
 586                                                  bool recordAccumulatedGCTime,
 587                                                  bool recordGCEndTime,
 588                                                  bool countCollection) {
 589     initialize(fullGC, cause, recordGCBeginTime, recordPreGCUsage, recordPeakUsage,
 590              recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
 591              countCollection);
 592 }
 593 
 594 // for a subclass to create then initialize an instance before invoking
 595 // the MemoryService
 596 void TraceMemoryManagerStats::initialize(bool fullGC,
 597                                          GCCause::Cause cause,
 598                                          bool recordGCBeginTime,
 599                                          bool recordPreGCUsage,
 600                                          bool recordPeakUsage,
 601                                          bool recordPostGCUsage,
 602                                          bool recordAccumulatedGCTime,
 603                                          bool recordGCEndTime,
 604                                          bool countCollection) {
 605   _fullGC = fullGC;
 606   _recordGCBeginTime = recordGCBeginTime;
 607   _recordPreGCUsage = recordPreGCUsage;
 608   _recordPeakUsage = recordPeakUsage;
 609   _recordPostGCUsage = recordPostGCUsage;
 610   _recordAccumulatedGCTime = recordAccumulatedGCTime;
 611   _recordGCEndTime = recordGCEndTime;
 612   _countCollection = countCollection;
 613   _cause = cause;
 614 
 615   MemoryService::gc_begin(_fullGC, _recordGCBeginTime, _recordAccumulatedGCTime,
 616                           _recordPreGCUsage, _recordPeakUsage);
 617 }
 618 
 619 TraceMemoryManagerStats::~TraceMemoryManagerStats() {
 620   MemoryService::gc_end(_fullGC, _recordPostGCUsage, _recordAccumulatedGCTime,
 621                         _recordGCEndTime, _countCollection, _cause);
 622 }