1 /*
2 * Copyright (c) 2012, 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_implementation/shared/gcHeapSummary.hpp"
27 #include "gc_implementation/shared/gcTimer.hpp"
28 #include "gc_implementation/shared/gcTrace.hpp"
29 #include "gc_implementation/shared/copyFailedInfo.hpp"
30 #include "memory/heapInspection.hpp"
31 #include "memory/iterator.hpp"
32 #include "memory/referenceProcessorStats.hpp"
33 #include "utilities/globalDefinitions.hpp"
34
35 #ifndef SERIALGC
36 #include "gc_implementation/g1/evacuationInfo.hpp"
37 #endif
38
39 #define assert_unset_gc_id() assert(_shared_gc_info.id() == SharedGCInfo::UNSET_GCID, "GC already started?")
40 #define assert_set_gc_id() assert(_shared_gc_info.id() != SharedGCInfo::UNSET_GCID, "GC not started?")
41
42 static jlong GCTracer_next_gc_id = 0;
43 static GCId create_new_gc_id() {
44 return GCTracer_next_gc_id++;
45 }
46
47 void GCTracer::report_gc_start_impl(GCCause::Cause cause, jlong timestamp) {
48 assert_unset_gc_id();
49
50 GCId gc_id = create_new_gc_id();
51 _shared_gc_info.set_id(gc_id);
52 _shared_gc_info.set_cause(cause);
53 _shared_gc_info.set_start_timestamp(timestamp);
54 }
55
56 void GCTracer::report_gc_start(GCCause::Cause cause, jlong timestamp) {
57 assert_unset_gc_id();
58
59 report_gc_start_impl(cause, timestamp);
60 }
61
62 bool GCTracer::has_reported_gc_start() const {
63 return _shared_gc_info.id() != SharedGCInfo::UNSET_GCID;
64 }
65
66 void GCTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
67 assert_set_gc_id();
68
69 _shared_gc_info.set_sum_of_pauses(time_partitions->sum_of_pauses());
70 _shared_gc_info.set_longest_pause(time_partitions->longest_pause());
71 _shared_gc_info.set_end_timestamp(timestamp);
72
73 send_phase_events(time_partitions);
74 send_garbage_collection_event();
75 }
76
77 void GCTracer::report_gc_end(jlong timestamp, TimePartitions* time_partitions) {
78 assert_set_gc_id();
79
80 report_gc_end_impl(timestamp, time_partitions);
81
82 _shared_gc_info.set_id(SharedGCInfo::UNSET_GCID);
83 }
84
85 void GCTracer::report_gc_reference_stats(const ReferenceProcessorStats& rps) const {
86 assert_set_gc_id();
87
88 send_reference_stats_event(REF_SOFT, rps.soft_count());
89 send_reference_stats_event(REF_WEAK, rps.weak_count());
90 send_reference_stats_event(REF_FINAL, rps.final_count());
91 send_reference_stats_event(REF_PHANTOM, rps.phantom_count());
92 }
93
94 void ObjectCountEventSenderClosure::do_cinfo(KlassInfoEntry* entry) {
95 if (should_send_event(entry)) {
96 send_event(entry);
97 }
98 }
99
100 void ObjectCountEventSenderClosure::send_event(KlassInfoEntry* entry) {
101 _gc_tracer->send_object_count_after_gc_event(entry->klass(), entry->count(),
102 entry->words() * BytesPerWord);
103 }
104
105 bool ObjectCountEventSenderClosure::should_send_event(KlassInfoEntry* entry) const {
106 double percentage_of_heap = ((double) entry->words()) / _total_size_in_words;
107 return percentage_of_heap > _size_threshold_percentage;
108 }
109
110 bool ObjectCountFilter::do_object_b(oop obj) {
111 bool is_alive = _is_alive == NULL? true : _is_alive->do_object_b(obj);
112 return is_alive && is_externally_visible_klass(obj->klass());
113 }
114
115 bool ObjectCountFilter::is_externally_visible_klass(klassOop k) const {
116 // Do not expose internal implementation specific classes
117 return (k->klass_part()->oop_is_instance() || k->klass_part()->oop_is_array()) &&
118 k != Universe::systemObjArrayKlassObj();
119 }
120
121 void GCTracer::report_object_count_after_gc(BoolObjectClosure *is_alive_cl) {
122 if (should_send_object_count_after_gc_event()) {
123 ResourceMark rm;
124
125 KlassInfoTable cit(HeapInspection::start_of_perm_gen());
126 if (!cit.allocation_failed()) {
127 ObjectCountFilter object_filter(is_alive_cl);
128 HeapInspection::populate_table(&cit, false, &object_filter);
129
130 ObjectCountEventSenderClosure event_sender(this, cit.size_of_instances_in_words());
131 cit.iterate(&event_sender);
132 }
133 }
134 }
135
136 void GCTracer::report_gc_heap_summary(GCWhen::Type when, const GCHeapSummary& heap_summary, const PermGenSummary& perm_gen_summary) const {
137 assert_set_gc_id();
138
139 send_gc_heap_summary_event(when, heap_summary);
140 send_perm_gen_summary_event(when, perm_gen_summary);
141 }
142
143 void YoungGCTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
144 assert_set_gc_id();
145 assert(_tenuring_threshold != UNSET_TENURING_THRESHOLD, "Tenuring threshold has not been reported");
146
147 GCTracer::report_gc_end_impl(timestamp, time_partitions);
148 send_young_gc_event();
149
150 _tenuring_threshold = UNSET_TENURING_THRESHOLD;
151 }
152
153 void YoungGCTracer::report_promotion_failed(const PromotionFailedInfo& pf_info) {
154 assert_set_gc_id();
155
156 send_promotion_failed_event(pf_info);
157 }
158
159 void YoungGCTracer::report_tenuring_threshold(const uint tenuring_threshold) {
160 _tenuring_threshold = tenuring_threshold;
161 }
162
163 void OldGCTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
164 assert_set_gc_id();
165
166 GCTracer::report_gc_end_impl(timestamp, time_partitions);
167 send_old_gc_event();
168 }
169
170 void ParallelOldTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
171 assert_set_gc_id();
172
173 OldGCTracer::report_gc_end_impl(timestamp, time_partitions);
174 send_parallel_old_event();
175 }
176
177 void ParallelOldTracer::report_dense_prefix(void* dense_prefix) {
178 assert_set_gc_id();
179
180 _parallel_old_gc_info.report_dense_prefix(dense_prefix);
181 }
182
183 void OldGCTracer::report_concurrent_mode_failure() {
184 assert_set_gc_id();
185
186 send_concurrent_mode_failure_event();
187 }
188
189 #ifndef SERIALGC
190 void G1NewTracer::report_yc_type(G1YCType type) {
191 assert_set_gc_id();
192
193 _g1_young_gc_info.set_type(type);
194 }
195
196 void G1NewTracer::report_gc_end_impl(jlong timestamp, TimePartitions* time_partitions) {
197 assert_set_gc_id();
198
199 YoungGCTracer::report_gc_end_impl(timestamp, time_partitions);
200 send_g1_young_gc_event();
201 }
202
203 void G1NewTracer::report_evacuation_info(EvacuationInfo* info) {
204 assert_set_gc_id();
205
206 send_evacuation_info_event(info);
207 }
208
209 void G1NewTracer::report_evacuation_failed(EvacuationFailedInfo& ef_info) {
210 assert_set_gc_id();
211
212 send_evacuation_failed_event(ef_info);
213 ef_info.reset();
214 }
215 #endif