1 /*

     2  * Copyright (c) 2003, 2017, 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/parallel/mutableSpace.hpp"

    29 #include "gc/serial/defNewGeneration.hpp"

    30 #include "gc/serial/tenuredGeneration.hpp"

    31 #include "gc/shared/collectorPolicy.hpp"

    32 #include "gc/shared/genCollectedHeap.hpp"

    33 #include "gc/shared/generation.hpp"

    34 #include "gc/shared/generationSpec.hpp"

    35 #include "logging/logConfiguration.hpp"

    36 #include "memory/heap.hpp"

    37 #include "memory/memRegion.hpp"

    38 #include "oops/oop.inline.hpp"

    39 #include "runtime/globals.hpp"

    40 #include "runtime/javaCalls.hpp"

    41 #include "services/classLoadingService.hpp"

    42 #include "services/lowMemoryDetector.hpp"

    43 #include "services/management.hpp"

    44 #include "services/memoryManager.hpp"

    45 #include "services/memoryPool.hpp"

    46 #include "services/memoryService.hpp"

    47 #include "utilities/growableArray.hpp"

    48 #include "utilities/macros.hpp"

    49 #if INCLUDE_ALL_GCS

    50 #include "gc/cms/concurrentMarkSweepGeneration.hpp"

    51 #include "gc/cms/parNewGeneration.hpp"

    52 #include "gc/g1/g1CollectedHeap.inline.hpp"

    53 #include "gc/parallel/parallelScavengeHeap.hpp"

    54 #include "gc/parallel/psOldGen.hpp"

    55 #include "gc/parallel/psYoungGen.hpp"

    56 #include "services/g1MemoryPool.hpp"

    57 #include "services/psMemoryPool.hpp"

    58 #endif // INCLUDE_ALL_GCS

    59 

    60 GrowableArray<MemoryPool*>* MemoryService::_pools_list =

    61   new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_pools_list_size, true);

    62 GrowableArray<MemoryManager*>* MemoryService::_managers_list =

    63   new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryManager*>(init_managers_list_size, true);

    64 

    65 GCMemoryManager* MemoryService::_minor_gc_manager      = NULL;

    66 GCMemoryManager* MemoryService::_major_gc_manager      = NULL;

    67 MemoryManager*   MemoryService::_code_cache_manager    = NULL;

    68 GrowableArray<MemoryPool*>* MemoryService::_code_heap_pools =

    69     new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_code_heap_pools_size, true);

    70 MemoryPool*      MemoryService::_metaspace_pool        = NULL;

    71 MemoryPool*      MemoryService::_compressed_class_pool = NULL;

    72 

    73 class GcThreadCountClosure: public ThreadClosure {

    74  private:

    75   int _count;

    76  public:

    77   GcThreadCountClosure() : _count(0) {};

    78   void do_thread(Thread* thread);

    79   int count() { return _count; }

    80 };

    81 

    82 void GcThreadCountClosure::do_thread(Thread* thread) {

    83   _count++;

    84 }

    85 

    86 void MemoryService::set_universe_heap(CollectedHeap* heap) {

    87   CollectedHeap::Name kind = heap->kind();

    88   switch (kind) {

    89     case CollectedHeap::GenCollectedHeap : {

    90       add_gen_collected_heap_info(GenCollectedHeap::heap());

    91       break;

    92     }

    93 #if INCLUDE_ALL_GCS

    94     case CollectedHeap::ParallelScavengeHeap : {

    95       add_parallel_scavenge_heap_info(ParallelScavengeHeap::heap());

    96       break;

    97     }

    98     case CollectedHeap::G1CollectedHeap : {

    99       add_g1_heap_info(G1CollectedHeap::heap());

   100       break;

   101     }

   102 #endif // INCLUDE_ALL_GCS

   103     default: {

   104       guarantee(false, "Unrecognized kind of heap");

   105     }

   106   }

   107 

   108   // set the GC thread count

   109   GcThreadCountClosure gctcc;

   110   heap->gc_threads_do(&gctcc);

   111   int count = gctcc.count();

   112   if (count > 0) {

   113     _minor_gc_manager->set_num_gc_threads(count);

   114     _major_gc_manager->set_num_gc_threads(count);

   115   }

   116 

   117   // All memory pools and memory managers are initialized.

   118   //

   119   _minor_gc_manager->initialize_gc_stat_info();

   120   _major_gc_manager->initialize_gc_stat_info();

   121 }

   122 

   123 // Add memory pools for GenCollectedHeap

   124 // This function currently only supports two generations collected heap.

   125 // The collector for GenCollectedHeap will have two memory managers.

   126 void MemoryService::add_gen_collected_heap_info(GenCollectedHeap* heap) {

   127   CollectorPolicy* policy = heap->collector_policy();

   128 

   129   assert(policy->is_generation_policy(), "Only support two generations");

   130   GenCollectorPolicy* gen_policy = policy->as_generation_policy();

   131   if (gen_policy != NULL) {

   132     Generation::Name kind = gen_policy->young_gen_spec()->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         _minor_gc_manager = MemoryManager::get_parnew_memory_manager();

   140         break;

   141 #endif // INCLUDE_ALL_GCS

   142       default:

   143         guarantee(false, "Unrecognized generation spec");

   144         break;

   145     }

   146     if (policy->is_mark_sweep_policy()) {

   147       _major_gc_manager = MemoryManager::get_msc_memory_manager();

   148 #if INCLUDE_ALL_GCS

   149     } else if (policy->is_concurrent_mark_sweep_policy()) {

   150       _major_gc_manager = MemoryManager::get_cms_memory_manager();

   151 #endif // INCLUDE_ALL_GCS

   152     } else {

   153       guarantee(false, "Unknown two-gen policy");

   154     }

   155   } else {

   156     guarantee(false, "Non two-gen policy");

   157   }

   158   _managers_list->append(_minor_gc_manager);

   159   _managers_list->append(_major_gc_manager);

   160 

   161   add_generation_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager);

   162   add_generation_memory_pool(heap->old_gen(), _major_gc_manager);

   163 }

   164 

   165 #if INCLUDE_ALL_GCS

   166 // Add memory pools for ParallelScavengeHeap

   167 // This function currently only supports two generations collected heap.

   168 // The collector for ParallelScavengeHeap will have two memory managers.

   169 void MemoryService::add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap) {

   170   // Two managers to keep statistics about _minor_gc_manager and _major_gc_manager GC.

   171   _minor_gc_manager = MemoryManager::get_psScavenge_memory_manager();

   172   _major_gc_manager = MemoryManager::get_psMarkSweep_memory_manager();

   173   _managers_list->append(_minor_gc_manager);

   174   _managers_list->append(_major_gc_manager);

   175 

   176   add_psYoung_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager);

   177   add_psOld_memory_pool(heap->old_gen(), _major_gc_manager);

   178 }

   179 

   180 void MemoryService::add_g1_heap_info(G1CollectedHeap* g1h) {

   181   assert(UseG1GC, "sanity");

   182 

   183   _minor_gc_manager = MemoryManager::get_g1YoungGen_memory_manager();

   184   _major_gc_manager = MemoryManager::get_g1OldGen_memory_manager();

   185   _managers_list->append(_minor_gc_manager);

   186   _managers_list->append(_major_gc_manager);

   187 

   188   add_g1YoungGen_memory_pool(g1h, _major_gc_manager, _minor_gc_manager);

   189   add_g1OldGen_memory_pool(g1h, _major_gc_manager);

   190 }

   191 #endif // INCLUDE_ALL_GCS

   192 

   193 MemoryPool* MemoryService::add_gen(Generation* gen,

   194                                    const char* name,

   195                                    bool is_heap,

   196                                    bool support_usage_threshold) {

   197 

   198   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);

   199   GenerationPool* pool = new GenerationPool(gen, name, type, support_usage_threshold);

   200   _pools_list->append(pool);

   201   return (MemoryPool*) pool;

   202 }

   203 

   204 MemoryPool* MemoryService::add_space(ContiguousSpace* space,

   205                                      const char* name,

   206                                      bool is_heap,

   207                                      size_t max_size,

   208                                      bool support_usage_threshold) {

   209   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);

   210   ContiguousSpacePool* pool = new ContiguousSpacePool(space, name, type, max_size, support_usage_threshold);

   211 

   212   _pools_list->append(pool);

   213   return (MemoryPool*) pool;

   214 }

   215 

   216 MemoryPool* MemoryService::add_survivor_spaces(DefNewGeneration* young_gen,

   217                                                const char* name,

   218                                                bool is_heap,

   219                                                size_t max_size,

   220                                                bool support_usage_threshold) {

   221   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);

   222   SurvivorContiguousSpacePool* pool = new SurvivorContiguousSpacePool(young_gen, name, type, max_size, support_usage_threshold);

   223 

   224   _pools_list->append(pool);

   225   return (MemoryPool*) pool;

   226 }

   227 

   228 #if INCLUDE_ALL_GCS

   229 MemoryPool* MemoryService::add_cms_space(CompactibleFreeListSpace* space,

   230                                          const char* name,

   231                                          bool is_heap,

   232                                          size_t max_size,

   233                                          bool support_usage_threshold) {

   234   MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);

   235   CompactibleFreeListSpacePool* pool = new CompactibleFreeListSpacePool(space, name, type, max_size, support_usage_threshold);

   236   _pools_list->append(pool);

   237   return (MemoryPool*) pool;

   238 }

   239 #endif // INCLUDE_ALL_GCS

   240 

   241 // Add memory pool(s) for one generation

   242 void MemoryService::add_generation_memory_pool(Generation* gen,

   243                                                MemoryManager* major_mgr,

   244                                                MemoryManager* minor_mgr) {

   245   guarantee(gen != NULL, "No generation for memory pool");

   246   Generation::Name kind = gen->kind();

   247   int index = _pools_list->length();

   248 

   249   switch (kind) {

   250     case Generation::DefNew: {

   251       assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");

   252       DefNewGeneration* young_gen = (DefNewGeneration*) gen;

   253       // Add a memory pool for each space and young gen doesn't

   254       // support low memory detection as it is expected to get filled up.

   255       MemoryPool* eden = add_space(young_gen->eden(),

   256                                    "Eden Space",

   257                                    true, /* is_heap */

   258                                    young_gen->max_eden_size(),

   259                                    false /* support_usage_threshold */);

   260       MemoryPool* survivor = add_survivor_spaces(young_gen,

   261                                                  "Survivor Space",

   262                                                  true, /* is_heap */

   263                                                  young_gen->max_survivor_size(),

   264                                                  false /* support_usage_threshold */);

   265       break;

   266     }

   267 

   268 #if INCLUDE_ALL_GCS

   269     case Generation::ParNew:

   270     {

   271       assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");

   272       // Add a memory pool for each space and young gen doesn't

   273       // support low memory detection as it is expected to get filled up.

   274       ParNewGeneration* parnew_gen = (ParNewGeneration*) gen;

   275       MemoryPool* eden = add_space(parnew_gen->eden(),

   276                                    "Par Eden Space",

   277                                    true /* is_heap */,

   278                                    parnew_gen->max_eden_size(),

   279                                    false /* support_usage_threshold */);

   280       MemoryPool* survivor = add_survivor_spaces(parnew_gen,

   281                                                  "Par Survivor Space",

   282                                                  true, /* is_heap */

   283                                                  parnew_gen->max_survivor_size(),

   284                                                  false /* support_usage_threshold */);

   285 

   286       break;

   287     }

   288 #endif // INCLUDE_ALL_GCS

   289 

   290     case Generation::MarkSweepCompact: {

   291       assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager");

   292       add_gen(gen,

   293               "Tenured Gen",

   294               true, /* is_heap */

   295               true  /* support_usage_threshold */);

   296       break;

   297     }

   298 

   299 #if INCLUDE_ALL_GCS

   300     case Generation::ConcurrentMarkSweep:

   301     {

   302       assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager");

   303       ConcurrentMarkSweepGeneration* cms = (ConcurrentMarkSweepGeneration*) gen;

   304       MemoryPool* pool = add_cms_space(cms->cmsSpace(),

   305                                        "CMS Old Gen",

   306                                        true, /* is_heap */

   307                                        cms->reserved().byte_size(),

   308                                        true  /* support_usage_threshold */);

   309       break;

   310     }

   311 #endif // INCLUDE_ALL_GCS

   312 

   313     default:

   314       assert(false, "should not reach here");

   315       // no memory pool added for others

   316       break;

   317   }

   318 

   319   assert(major_mgr != NULL, "Should have at least one manager");

   320   // Link managers and the memory pools together

   321   for (int i = index; i < _pools_list->length(); i++) {

   322     MemoryPool* pool = _pools_list->at(i);

   323     major_mgr->add_pool(pool);

   324     if (minor_mgr != NULL) {

   325       minor_mgr->add_pool(pool);

   326     }

   327   }

   328 }

   329 

   330 

   331 #if INCLUDE_ALL_GCS

   332 void MemoryService::add_psYoung_memory_pool(PSYoungGen* young_gen, MemoryManager* major_mgr, MemoryManager* minor_mgr) {

   333   assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");

   334 

   335   // Add a memory pool for each space and young gen doesn't

   336   // support low memory detection as it is expected to get filled up.

   337   EdenMutableSpacePool* eden = new EdenMutableSpacePool(young_gen,

   338                                                         young_gen->eden_space(),

   339                                                         "PS Eden Space",

   340                                                         MemoryPool::Heap,

   341                                                         false /* support_usage_threshold */);

   342 

   343   SurvivorMutableSpacePool* survivor = new SurvivorMutableSpacePool(young_gen,

   344                                                                     "PS Survivor Space",

   345                                                                     MemoryPool::Heap,

   346                                                                     false /* support_usage_threshold */);

   347 

   348   major_mgr->add_pool(eden);

   349   major_mgr->add_pool(survivor);

   350   minor_mgr->add_pool(eden);

   351   minor_mgr->add_pool(survivor);

   352   _pools_list->append(eden);

   353   _pools_list->append(survivor);

   354 }

   355 

   356 void MemoryService::add_psOld_memory_pool(PSOldGen* old_gen, MemoryManager* mgr) {

   357   PSGenerationPool* old_gen_pool = new PSGenerationPool(old_gen,

   358                                                        "PS Old Gen",

   359                                                        MemoryPool::Heap,

   360                                                        true /* support_usage_threshold */);

   361   mgr->add_pool(old_gen_pool);

   362   _pools_list->append(old_gen_pool);

   363 }

   364 

   365 void MemoryService::add_g1YoungGen_memory_pool(G1CollectedHeap* g1h,

   366                                                MemoryManager* major_mgr,

   367                                                MemoryManager* minor_mgr) {

   368   assert(major_mgr != NULL && minor_mgr != NULL, "should have two managers");

   369 

   370   G1EdenPool* eden = new G1EdenPool(g1h);

   371   G1SurvivorPool* survivor = new G1SurvivorPool(g1h);

   372 

   373   major_mgr->add_pool(eden);

   374   major_mgr->add_pool(survivor);

   375   minor_mgr->add_pool(eden);

   376   minor_mgr->add_pool(survivor);

   377   _pools_list->append(eden);

   378   _pools_list->append(survivor);

   379 }

   380 

   381 void MemoryService::add_g1OldGen_memory_pool(G1CollectedHeap* g1h,

   382                                              MemoryManager* mgr) {

   383   assert(mgr != NULL, "should have one manager");

   384 

   385   G1OldGenPool* old_gen = new G1OldGenPool(g1h);

   386   mgr->add_pool(old_gen);

   387   _pools_list->append(old_gen);

   388 }

   389 #endif // INCLUDE_ALL_GCS

   390 

   391 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap, const char* name) {

   392   // Create new memory pool for this heap

   393   MemoryPool* code_heap_pool = new CodeHeapPool(heap, name, true /* support_usage_threshold */);

   394 

   395   // Append to lists

   396   _code_heap_pools->append(code_heap_pool);

   397   _pools_list->append(code_heap_pool);

   398 

   399   if (_code_cache_manager == NULL) {

   400     // Create CodeCache memory manager

   401     _code_cache_manager = MemoryManager::get_code_cache_memory_manager();

   402     _managers_list->append(_code_cache_manager);

   403   }

   404 

   405   _code_cache_manager->add_pool(code_heap_pool);

   406 }

   407 

   408 void MemoryService::add_metaspace_memory_pools() {

   409   MemoryManager* mgr = MemoryManager::get_metaspace_memory_manager();

   410 

   411   _metaspace_pool = new MetaspacePool();

   412   mgr->add_pool(_metaspace_pool);

   413   _pools_list->append(_metaspace_pool);

   414 

   415   if (UseCompressedClassPointers) {

   416     _compressed_class_pool = new CompressedKlassSpacePool();

   417     mgr->add_pool(_compressed_class_pool);

   418     _pools_list->append(_compressed_class_pool);

   419   }

   420 

   421   _managers_list->append(mgr);

   422 }

   423 

   424 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {

   425   for (int i = 0; i < _managers_list->length(); i++) {

   426     MemoryManager* mgr = _managers_list->at(i);

   427     if (mgr->is_manager(mh)) {

   428       return mgr;

   429     }

   430   }

   431   return NULL;

   432 }

   433 

   434 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {

   435   for (int i = 0; i < _pools_list->length(); i++) {

   436     MemoryPool* pool = _pools_list->at(i);

   437     if (pool->is_pool(ph)) {

   438       return pool;

   439     }

   440   }

   441   return NULL;

   442 }

   443 

   444 void MemoryService::track_memory_usage() {

   445   // Track the peak memory usage

   446   for (int i = 0; i < _pools_list->length(); i++) {

   447     MemoryPool* pool = _pools_list->at(i);

   448     pool->record_peak_memory_usage();

   449   }

   450 

   451   // Detect low memory

   452   LowMemoryDetector::detect_low_memory();

   453 }

   454 

   455 void MemoryService::track_memory_pool_usage(MemoryPool* pool) {

   456   // Track the peak memory usage

   457   pool->record_peak_memory_usage();

   458 

   459   // Detect low memory

   460   if (LowMemoryDetector::is_enabled(pool)) {

   461     LowMemoryDetector::detect_low_memory(pool);

   462   }

   463 }

   464 

   465 void MemoryService::gc_begin(bool fullGC, bool recordGCBeginTime,

   466                              bool recordAccumulatedGCTime,

   467                              bool recordPreGCUsage, bool recordPeakUsage) {

   468 

   469   GCMemoryManager* mgr;

   470   if (fullGC) {

   471     mgr = _major_gc_manager;

   472   } else {

   473     mgr = _minor_gc_manager;

   474   }

   475   assert(mgr->is_gc_memory_manager(), "Sanity check");

   476   mgr->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime);

   477 

   478   // Track the peak memory usage when GC begins

   479   if (recordPeakUsage) {

   480     for (int i = 0; i < _pools_list->length(); i++) {

   481       MemoryPool* pool = _pools_list->at(i);

   482       pool->record_peak_memory_usage();

   483     }

   484   }

   485 }

   486 

   487 void MemoryService::gc_end(bool fullGC, bool recordPostGCUsage,

   488                            bool recordAccumulatedGCTime,

   489                            bool recordGCEndTime, bool countCollection,

   490                            GCCause::Cause cause) {

   491 

   492   GCMemoryManager* mgr;

   493   if (fullGC) {

   494     mgr = (GCMemoryManager*) _major_gc_manager;

   495   } else {

   496     mgr = (GCMemoryManager*) _minor_gc_manager;

   497   }

   498   assert(mgr->is_gc_memory_manager(), "Sanity check");

   499 

   500   // register the GC end statistics and memory usage

   501   mgr->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,

   502               countCollection, cause);

   503 }

   504 

   505 void MemoryService::oops_do(OopClosure* f) {

   506   int i;

   507 

   508   for (i = 0; i < _pools_list->length(); i++) {

   509     MemoryPool* pool = _pools_list->at(i);

   510     pool->oops_do(f);

   511   }

   512   for (i = 0; i < _managers_list->length(); i++) {

   513     MemoryManager* mgr = _managers_list->at(i);

   514     mgr->oops_do(f);

   515   }

   516 }

   517 

   518 bool MemoryService::set_verbose(bool verbose) {

   519   MutexLocker m(Management_lock);

   520   // verbose will be set to the previous value

   521   if (verbose) {

   522     LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));

   523   } else {

   524     LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));

   525   }

   526   ClassLoadingService::reset_trace_class_unloading();

   527 

   528   return verbose;

   529 }

   530 

   531 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {

   532   InstanceKlass* ik = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);

   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 // availability 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       _fullGC = false;

   575       assert(false, "Unrecognized gc generation kind.");

   576   }

   577   // this has to be called in a stop the world pause and represent

   578   // an entire gc pause, start to finish:

   579   initialize(_fullGC, cause, true, true, true, true, true, true, true);

   580 }

   581 

   582 TraceMemoryManagerStats::TraceMemoryManagerStats(bool fullGC,

   583                                                  GCCause::Cause cause,

   584                                                  bool recordGCBeginTime,

   585                                                  bool recordPreGCUsage,

   586                                                  bool recordPeakUsage,

   587                                                  bool recordPostGCUsage,

   588                                                  bool recordAccumulatedGCTime,

   589                                                  bool recordGCEndTime,

   590                                                  bool countCollection) {

   591   initialize(fullGC, cause, recordGCBeginTime, recordPreGCUsage, recordPeakUsage,

   592              recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,

   593              countCollection);

   594 }

   595 

   596 // for a subclass to create then initialize an instance before invoking

   597 // the MemoryService

   598 void TraceMemoryManagerStats::initialize(bool fullGC,

   599                                          GCCause::Cause cause,

   600                                          bool recordGCBeginTime,

   601                                          bool recordPreGCUsage,

   602                                          bool recordPeakUsage,

   603                                          bool recordPostGCUsage,

   604                                          bool recordAccumulatedGCTime,

   605                                          bool recordGCEndTime,

   606                                          bool countCollection) {

   607   _fullGC = fullGC;

   608   _recordGCBeginTime = recordGCBeginTime;

   609   _recordPreGCUsage = recordPreGCUsage;

   610   _recordPeakUsage = recordPeakUsage;

   611   _recordPostGCUsage = recordPostGCUsage;

   612   _recordAccumulatedGCTime = recordAccumulatedGCTime;

   613   _recordGCEndTime = recordGCEndTime;

   614   _countCollection = countCollection;

   615   _cause = cause;

   616 

   617   MemoryService::gc_begin(_fullGC, _recordGCBeginTime, _recordAccumulatedGCTime,

   618                           _recordPreGCUsage, _recordPeakUsage);

   619 }

   620 

   621 TraceMemoryManagerStats::~TraceMemoryManagerStats() {

   622   MemoryService::gc_end(_fullGC, _recordPostGCUsage, _recordAccumulatedGCTime,

   623                         _recordGCEndTime, _countCollection, _cause);

   624 }