1 /*
   2  * Copyright (c) 2012, 2015, 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 "gc/shared/copyFailedInfo.hpp"
  27 #include "gc/shared/gcHeapSummary.hpp"
  28 #include "gc/shared/gcId.hpp"
  29 #include "gc/shared/gcTimer.hpp"
  30 #include "gc/shared/gcTrace.hpp"
  31 #include "gc/shared/objectCountEventSender.hpp"
  32 #include "gc/shared/referenceProcessorStats.hpp"
  33 #include "memory/heapInspection.hpp"
  34 #include "memory/resourceArea.hpp"
  35 #include "runtime/os.hpp"
  36 #include "utilities/globalDefinitions.hpp"
  37 #include "utilities/macros.hpp"
  38 #include "utilities/ticks.inline.hpp"
  39 #if INCLUDE_ALL_GCS
  40 #include "gc/g1/evacuationInfo.hpp"
  41 #endif
  42 
  43 #define assert_unset_gc_id() assert(_shared_gc_info.gc_id().is_undefined(), "GC already started?")
  44 #define assert_set_gc_id() assert(!_shared_gc_info.gc_id().is_undefined(), "GC not started?")
  45 
  46 void GCTracer::report_gc_start_impl(GCCause::Cause cause, const Ticks& timestamp) {
  47   assert_unset_gc_id();
  48 
  49   GCId gc_id = GCId::create();
  50   _shared_gc_info.set_gc_id(gc_id);
  51   _shared_gc_info.set_cause(cause);
  52   _shared_gc_info.set_start_timestamp(timestamp);
  53 }
  54 
  55 void GCTracer::report_gc_start(GCCause::Cause cause, const Ticks& timestamp) {
  56   assert_unset_gc_id();
  57 
  58   report_gc_start_impl(cause, timestamp);
  59 }
  60 
  61 bool GCTracer::has_reported_gc_start() const {
  62   return !_shared_gc_info.gc_id().is_undefined();
  63 }
  64 
  65 void GCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
  66   assert_set_gc_id();
  67 
  68   _shared_gc_info.set_sum_of_pauses(time_partitions->sum_of_pauses());
  69   _shared_gc_info.set_longest_pause(time_partitions->longest_pause());
  70   _shared_gc_info.set_end_timestamp(timestamp);
  71 
  72   send_phase_events(time_partitions);
  73   send_garbage_collection_event();
  74 }
  75 
  76 void GCTracer::report_gc_end(const Ticks& timestamp, TimePartitions* time_partitions) {
  77   assert_set_gc_id();
  78 
  79   report_gc_end_impl(timestamp, time_partitions);
  80 
  81   _shared_gc_info.set_gc_id(GCId::undefined());
  82 }
  83 
  84 void GCTracer::report_gc_reference_stats(const ReferenceProcessorStats& rps) const {
  85   assert_set_gc_id();
  86 
  87   send_reference_stats_event(REF_SOFT, rps.soft_count());
  88   send_reference_stats_event(REF_WEAK, rps.weak_count());
  89   send_reference_stats_event(REF_FINAL, rps.final_count());
  90   send_reference_stats_event(REF_PHANTOM, rps.phantom_count());
  91 }
  92 
  93 #if INCLUDE_SERVICES
  94 class ObjectCountEventSenderClosure : public KlassInfoClosure {
  95   const GCId _gc_id;
  96   const double _size_threshold_percentage;
  97   const size_t _total_size_in_words;
  98   const Ticks _timestamp;
  99 
 100  public:
 101   ObjectCountEventSenderClosure(GCId gc_id, size_t total_size_in_words, const Ticks& timestamp) :
 102     _gc_id(gc_id),
 103     _size_threshold_percentage(ObjectCountCutOffPercent / 100),
 104     _total_size_in_words(total_size_in_words),
 105     _timestamp(timestamp)
 106   {}
 107 
 108   virtual void do_cinfo(KlassInfoEntry* entry) {
 109     if (should_send_event(entry)) {
 110       ObjectCountEventSender::send(entry, _gc_id, _timestamp);
 111     }
 112   }
 113 
 114  private:
 115   bool should_send_event(const KlassInfoEntry* entry) const {
 116     double percentage_of_heap = ((double) entry->words()) / _total_size_in_words;
 117     return percentage_of_heap >= _size_threshold_percentage;
 118   }
 119 };
 120 
 121 void GCTracer::report_object_count_after_gc(BoolObjectClosure* is_alive_cl) {
 122   assert_set_gc_id();
 123   assert(is_alive_cl != NULL, "Must supply function to check liveness");
 124 
 125   if (ObjectCountEventSender::should_send_event()) {
 126     ResourceMark rm;
 127 
 128     KlassInfoTable cit(false);
 129     if (!cit.allocation_failed()) {
 130       HeapInspection hi(false, false, false, NULL);
 131       hi.populate_table(&cit, is_alive_cl);
 132       ObjectCountEventSenderClosure event_sender(_shared_gc_info.gc_id(), cit.size_of_instances_in_words(), Ticks::now());
 133       cit.iterate(&event_sender);
 134     }
 135   }
 136 }
 137 #endif // INCLUDE_SERVICES
 138 
 139 void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary) const {
 140   assert_set_gc_id();
 141 
 142   send_gc_heap_summary_event(when, heap_summary);
 143 }
 144 
 145 void GCTracer::report_metaspace_summary(GCWhen::Type when, const MetaspaceSummary& summary) const {
 146   assert_set_gc_id();
 147 
 148   send_meta_space_summary_event(when, summary);
 149 
 150   send_metaspace_chunk_free_list_summary(when, Metaspace::NonClassType, summary.metaspace_chunk_free_list_summary());
 151   if (UseCompressedClassPointers) {
 152     send_metaspace_chunk_free_list_summary(when, Metaspace::ClassType, summary.class_chunk_free_list_summary());
 153   }
 154 }
 155 
 156 void YoungGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 157   assert_set_gc_id();
 158   assert(_tenuring_threshold != UNSET_TENURING_THRESHOLD, "Tenuring threshold has not been reported");
 159 
 160   GCTracer::report_gc_end_impl(timestamp, time_partitions);
 161   send_young_gc_event();
 162 
 163   _tenuring_threshold = UNSET_TENURING_THRESHOLD;
 164 }
 165 
 166 void YoungGCTracer::report_promotion_failed(const PromotionFailedInfo& pf_info) const {
 167   assert_set_gc_id();
 168 
 169   send_promotion_failed_event(pf_info);
 170 }
 171 
 172 void YoungGCTracer::report_tenuring_threshold(const uint tenuring_threshold) {
 173   _tenuring_threshold = tenuring_threshold;
 174 }
 175 
 176 bool YoungGCTracer::should_report_promotion_in_new_plab_event() const {
 177   return should_send_promotion_in_new_plab_event();
 178 }
 179 
 180 bool YoungGCTracer::should_report_promotion_outside_plab_event() const {
 181   return should_send_promotion_outside_plab_event();
 182 }
 183 
 184 void YoungGCTracer::report_promotion_in_new_plab_event(Klass* klass, size_t obj_size,
 185                                                        uint age, bool tenured,
 186                                                        size_t plab_size) const {
 187   assert_set_gc_id();
 188   send_promotion_in_new_plab_event(klass, obj_size, age, tenured, plab_size);
 189 }
 190 
 191 void YoungGCTracer::report_promotion_outside_plab_event(Klass* klass, size_t obj_size,
 192                                                         uint age, bool tenured) const {
 193   assert_set_gc_id();
 194   send_promotion_outside_plab_event(klass, obj_size, age, tenured);
 195 }
 196 
 197 void OldGCTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 198   assert_set_gc_id();
 199 
 200   GCTracer::report_gc_end_impl(timestamp, time_partitions);
 201   send_old_gc_event();
 202 }
 203 
 204 void ParallelOldTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 205   assert_set_gc_id();
 206 
 207   OldGCTracer::report_gc_end_impl(timestamp, time_partitions);
 208   send_parallel_old_event();
 209 }
 210 
 211 void ParallelOldTracer::report_dense_prefix(void* dense_prefix) {
 212   assert_set_gc_id();
 213 
 214   _parallel_old_gc_info.report_dense_prefix(dense_prefix);
 215 }
 216 
 217 void OldGCTracer::report_concurrent_mode_failure() {
 218   assert_set_gc_id();
 219 
 220   send_concurrent_mode_failure_event();
 221 }
 222 
 223 #if INCLUDE_ALL_GCS
 224 void G1NewTracer::report_yc_type(G1YCType type) {
 225   assert_set_gc_id();
 226 
 227   _g1_young_gc_info.set_type(type);
 228 }
 229 
 230 void G1NewTracer::report_gc_end_impl(const Ticks& timestamp, TimePartitions* time_partitions) {
 231   assert_set_gc_id();
 232 
 233   YoungGCTracer::report_gc_end_impl(timestamp, time_partitions);
 234   send_g1_young_gc_event();
 235 }
 236 
 237 void G1NewTracer::report_evacuation_info(EvacuationInfo* info) {
 238   assert_set_gc_id();
 239 
 240   send_evacuation_info_event(info);
 241 }
 242 
 243 void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) {
 244   assert_set_gc_id();
 245 
 246   send_evacuation_failed_event(ef_info);
 247   ef_info.reset();
 248 }
 249 #endif