1 /*
2 * Copyright (c) 2016, 2018, 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/javaClasses.inline.hpp"
27 #include "code/codeBlob.hpp"
28 #include "code/codeCache.hpp"
29 #include "gc/shared/gcCause.hpp"
30 #include "gc/shared/gcName.hpp"
31 #include "gc/shared/gcTrace.hpp"
32 #include "gc/shared/gcWhen.hpp"
33 #include "jfr/leakprofiler/checkpoint/objectSampleCheckpoint.hpp"
34 #include "jfr/leakprofiler/leakProfiler.hpp"
35 #include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
36 #include "jfr/recorder/checkpoint/types/jfrType.hpp"
37 #include "jfr/recorder/jfrRecorder.hpp"
38 #include "jfr/recorder/checkpoint/types/jfrThreadGroup.hpp"
39 #include "jfr/recorder/checkpoint/types/jfrThreadState.hpp"
40 #include "jfr/recorder/checkpoint/types/jfrTypeSet.hpp"
41 #include "jfr/support/jfrThreadLocal.hpp"
42 #include "jfr/writers/jfrJavaEventWriter.hpp"
43 #include "memory/metaspaceGCThresholdUpdater.hpp"
44 #include "memory/referenceType.hpp"
45 #include "memory/universe.hpp"
46 #include "runtime/flags/jvmFlag.hpp"
47 #include "runtime/mutexLocker.hpp"
48 #include "runtime/osThread.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/synchronizer.hpp"
51 #include "runtime/thread.inline.hpp"
52 #include "runtime/vmOperations.hpp"
53
54 #ifdef COMPILER2
55 #include "opto/compile.hpp"
56 #include "opto/node.hpp"
57 #endif
58 #if INCLUDE_G1GC
59 #include "gc/g1/g1HeapRegionTraceType.hpp"
60 #include "gc/g1/g1YCTypes.hpp"
61 #endif
62
63 // Requires a ResourceMark for get_thread_name/as_utf8
64 class JfrCheckpointThreadClosure : public ThreadClosure {
65 private:
66 JfrCheckpointWriter& _writer;
67 JfrCheckpointContext _ctx;
68 const int64_t _count_position;
69 Thread* const _curthread;
70 u4 _count;
71
72 public:
JfrCheckpointThreadClosure(JfrCheckpointWriter & writer)73 JfrCheckpointThreadClosure(JfrCheckpointWriter& writer) : _writer(writer),
74 _ctx(writer.context()),
75 _count_position(writer.reserve(sizeof(u4))),
76 _curthread(Thread::current()),
77 _count(0) {
78 }
79
~JfrCheckpointThreadClosure()80 ~JfrCheckpointThreadClosure() {
81 if (_count == 0) {
82 // restore
83 _writer.set_context(_ctx);
84 return;
85 }
86 _writer.write_count(_count, _count_position);
87 }
88
89 void do_thread(Thread* t);
90 };
91
92 // Requires a ResourceMark for get_thread_name/as_utf8
do_thread(Thread * t)93 void JfrCheckpointThreadClosure::do_thread(Thread* t) {
94 assert(t != NULL, "invariant");
95 assert_locked_or_safepoint(Threads_lock);
96 const JfrThreadLocal* const tl = t->jfr_thread_local();
97 assert(tl != NULL, "invariant");
98 if (tl->is_dead()) {
99 return;
100 }
101 ++_count;
102 _writer.write_key(tl->thread_id());
103 _writer.write(t->name());
104 const OSThread* const os_thread = t->osthread();
105 _writer.write<traceid>(os_thread != NULL ? os_thread->thread_id() : 0);
106 if (t->is_Java_thread()) {
107 JavaThread* const jt = (JavaThread*)t;
108 _writer.write(jt->name());
109 _writer.write(java_lang_Thread::thread_id(jt->threadObj()));
110 _writer.write(JfrThreadGroup::thread_group_id(jt, _curthread));
111 // since we are iterating threads during a safepoint, also issue notification
112 JfrJavaEventWriter::notify(jt);
113 return;
114 }
115 _writer.write((const char*)NULL); // java name
116 _writer.write((traceid)0); // java thread id
117 _writer.write((traceid)0); // java thread group
118 }
119
serialize(JfrCheckpointWriter & writer)120 void JfrThreadConstantSet::serialize(JfrCheckpointWriter& writer) {
121 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
122 JfrCheckpointThreadClosure tc(writer);
123 Threads::threads_do(&tc);
124 }
125
serialize(JfrCheckpointWriter & writer)126 void JfrThreadGroupConstant::serialize(JfrCheckpointWriter& writer) {
127 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
128 JfrThreadGroup::serialize(writer);
129 }
130
flag_value_origin_to_string(JVMFlag::Flags origin)131 static const char* flag_value_origin_to_string(JVMFlag::Flags origin) {
132 switch (origin) {
133 case JVMFlag::DEFAULT: return "Default";
134 case JVMFlag::COMMAND_LINE: return "Command line";
135 case JVMFlag::ENVIRON_VAR: return "Environment variable";
136 case JVMFlag::CONFIG_FILE: return "Config file";
137 case JVMFlag::MANAGEMENT: return "Management";
138 case JVMFlag::ERGONOMIC: return "Ergonomic";
139 case JVMFlag::ATTACH_ON_DEMAND: return "Attach on demand";
140 case JVMFlag::INTERNAL: return "Internal";
141 default: ShouldNotReachHere(); return "";
142 }
143 }
144
serialize(JfrCheckpointWriter & writer)145 void FlagValueOriginConstant::serialize(JfrCheckpointWriter& writer) {
146 static const u4 nof_entries = JVMFlag::LAST_VALUE_ORIGIN + 1;
147 writer.write_count(nof_entries);
148 for (u4 i = 0; i < nof_entries; ++i) {
149 writer.write_key(i);
150 writer.write(flag_value_origin_to_string((JVMFlag::Flags)i));
151 }
152 }
153
serialize(JfrCheckpointWriter & writer)154 void MonitorInflateCauseConstant::serialize(JfrCheckpointWriter& writer) {
155 static const u4 nof_entries = ObjectSynchronizer::inflate_cause_nof;
156 writer.write_count(nof_entries);
157 for (u4 i = 0; i < nof_entries; ++i) {
158 writer.write_key(i);
159 writer.write(ObjectSynchronizer::inflate_cause_name((ObjectSynchronizer::InflateCause)i));
160 }
161 }
162
serialize(JfrCheckpointWriter & writer)163 void GCCauseConstant::serialize(JfrCheckpointWriter& writer) {
164 static const u4 nof_entries = GCCause::_last_gc_cause;
165 writer.write_count(nof_entries);
166 for (u4 i = 0; i < nof_entries; ++i) {
167 writer.write_key(i);
168 writer.write(GCCause::to_string((GCCause::Cause)i));
169 }
170 }
171
serialize(JfrCheckpointWriter & writer)172 void GCNameConstant::serialize(JfrCheckpointWriter& writer) {
173 static const u4 nof_entries = GCNameEndSentinel;
174 writer.write_count(nof_entries);
175 for (u4 i = 0; i < nof_entries; ++i) {
176 writer.write_key(i);
177 writer.write(GCNameHelper::to_string((GCName)i));
178 }
179 }
180
serialize(JfrCheckpointWriter & writer)181 void GCWhenConstant::serialize(JfrCheckpointWriter& writer) {
182 static const u4 nof_entries = GCWhen::GCWhenEndSentinel;
183 writer.write_count(nof_entries);
184 for (u4 i = 0; i < nof_entries; ++i) {
185 writer.write_key(i);
186 writer.write(GCWhen::to_string((GCWhen::Type)i));
187 }
188 }
189
serialize(JfrCheckpointWriter & writer)190 void G1HeapRegionTypeConstant::serialize(JfrCheckpointWriter& writer) {
191 static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
192 writer.write_count(nof_entries);
193 for (u4 i = 0; i < nof_entries; ++i) {
194 writer.write_key(i);
195 writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
196 }
197 }
198
serialize(JfrCheckpointWriter & writer)199 void GCThresholdUpdaterConstant::serialize(JfrCheckpointWriter& writer) {
200 static const u4 nof_entries = MetaspaceGCThresholdUpdater::Last;
201 writer.write_count(nof_entries);
202 for (u4 i = 0; i < nof_entries; ++i) {
203 writer.write_key(i);
204 writer.write(MetaspaceGCThresholdUpdater::to_string((MetaspaceGCThresholdUpdater::Type)i));
205 }
206 }
207
serialize(JfrCheckpointWriter & writer)208 void MetadataTypeConstant::serialize(JfrCheckpointWriter& writer) {
209 static const u4 nof_entries = Metaspace::MetadataTypeCount;
210 writer.write_count(nof_entries);
211 for (u4 i = 0; i < nof_entries; ++i) {
212 writer.write_key(i);
213 writer.write(Metaspace::metadata_type_name((Metaspace::MetadataType)i));
214 }
215 }
216
serialize(JfrCheckpointWriter & writer)217 void MetaspaceObjectTypeConstant::serialize(JfrCheckpointWriter& writer) {
218 static const u4 nof_entries = MetaspaceObj::_number_of_types;
219 writer.write_count(nof_entries);
220 for (u4 i = 0; i < nof_entries; ++i) {
221 writer.write_key(i);
222 writer.write(MetaspaceObj::type_name((MetaspaceObj::Type)i));
223 }
224 }
225
serialize(JfrCheckpointWriter & writer)226 void G1YCTypeConstant::serialize(JfrCheckpointWriter& writer) {
227 #if INCLUDE_G1GC
228 static const u4 nof_entries = G1YCTypeEndSentinel;
229 writer.write_count(nof_entries);
230 for (u4 i = 0; i < nof_entries; ++i) {
231 writer.write_key(i);
232 writer.write(G1YCTypeHelper::to_string((G1YCType)i));
233 }
234 #endif
235 }
236
reference_type_to_string(ReferenceType rt)237 static const char* reference_type_to_string(ReferenceType rt) {
238 switch (rt) {
239 case REF_NONE: return "None reference";
240 case REF_OTHER: return "Other reference";
241 case REF_SOFT: return "Soft reference";
242 case REF_WEAK: return "Weak reference";
243 case REF_FINAL: return "Final reference";
244 case REF_PHANTOM: return "Phantom reference";
245 default:
246 ShouldNotReachHere();
247 return NULL;
248 }
249 }
250
serialize(JfrCheckpointWriter & writer)251 void ReferenceTypeConstant::serialize(JfrCheckpointWriter& writer) {
252 static const u4 nof_entries = REF_PHANTOM + 1;
253 writer.write_count(nof_entries);
254 for (u4 i = 0; i < nof_entries; ++i) {
255 writer.write_key(i);
256 writer.write(reference_type_to_string((ReferenceType)i));
257 }
258 }
259
serialize(JfrCheckpointWriter & writer)260 void NarrowOopModeConstant::serialize(JfrCheckpointWriter& writer) {
261 static const u4 nof_entries = Universe::HeapBasedNarrowOop + 1;
262 writer.write_count(nof_entries);
263 for (u4 i = 0; i < nof_entries; ++i) {
264 writer.write_key(i);
265 writer.write(Universe::narrow_oop_mode_to_string((Universe::NARROW_OOP_MODE)i));
266 }
267 }
268
serialize(JfrCheckpointWriter & writer)269 void CompilerPhaseTypeConstant::serialize(JfrCheckpointWriter& writer) {
270 #ifdef COMPILER2
271 static const u4 nof_entries = PHASE_NUM_TYPES;
272 writer.write_count(nof_entries);
273 for (u4 i = 0; i < nof_entries; ++i) {
274 writer.write_key(i);
275 writer.write(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i));
276 }
277 #endif
278 }
279
serialize(JfrCheckpointWriter & writer)280 void CodeBlobTypeConstant::serialize(JfrCheckpointWriter& writer) {
281 static const u4 nof_entries = CodeBlobType::NumTypes;
282 writer.write_count(nof_entries);
283 for (u4 i = 0; i < nof_entries; ++i) {
284 writer.write_key(i);
285 writer.write(CodeCache::get_code_heap_name(i));
286 }
287 };
288
serialize(JfrCheckpointWriter & writer)289 void VMOperationTypeConstant::serialize(JfrCheckpointWriter& writer) {
290 static const u4 nof_entries = VM_Operation::VMOp_Terminating;
291 writer.write_count(nof_entries);
292 for (u4 i = 0; i < nof_entries; ++i) {
293 writer.write_key(i);
294 writer.write(VM_Operation::name(VM_Operation::VMOp_Type(i)));
295 }
296 }
297
298 class TypeSetSerialization {
299 private:
300 bool _class_unload;
301 public:
TypeSetSerialization(bool class_unload)302 explicit TypeSetSerialization(bool class_unload) : _class_unload(class_unload) {}
write(JfrCheckpointWriter & writer,JfrCheckpointWriter * leakp_writer)303 void write(JfrCheckpointWriter& writer, JfrCheckpointWriter* leakp_writer) {
304 JfrTypeSet::serialize(&writer, leakp_writer, _class_unload);
305 }
306 };
307
serialize(JfrCheckpointWriter & writer)308 void ClassUnloadTypeSet::serialize(JfrCheckpointWriter& writer) {
309 TypeSetSerialization type_set(true);
310 if (LeakProfiler::is_running()) {
311 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
312 type_set.write(writer, &leakp_writer);
313 ObjectSampleCheckpoint::install(leakp_writer, true, true);
314 return;
315 }
316 type_set.write(writer, NULL);
317 };
318
serialize(JfrCheckpointWriter & writer)319 void TypeSet::serialize(JfrCheckpointWriter& writer) {
320 TypeSetSerialization type_set(false);
321 if (LeakProfiler::is_suspended()) {
322 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
323 type_set.write(writer, &leakp_writer);
324 ObjectSampleCheckpoint::install(leakp_writer, false, true);
325 return;
326 }
327 type_set.write(writer, NULL);
328 };
329
serialize(JfrCheckpointWriter & writer)330 void ThreadStateConstant::serialize(JfrCheckpointWriter& writer) {
331 JfrThreadState::serialize(writer);
332 }
333
serialize(JfrCheckpointWriter & writer)334 void JfrThreadConstant::serialize(JfrCheckpointWriter& writer) {
335 assert(_thread != NULL, "invariant");
336 assert(_thread == Thread::current(), "invariant");
337 assert(_thread->is_Java_thread(), "invariant");
338 assert(!_thread->jfr_thread_local()->has_thread_checkpoint(), "invariant");
339 ResourceMark rm(_thread);
340 const oop threadObj = _thread->threadObj();
341 assert(threadObj != NULL, "invariant");
342 const u8 java_lang_thread_id = java_lang_Thread::thread_id(threadObj);
343 const char* const thread_name = _thread->name();
344 const traceid thread_group_id = JfrThreadGroup::thread_group_id(_thread);
345 writer.write_count(1);
346 writer.write_key(_thread->jfr_thread_local()->thread_id());
347 writer.write(thread_name);
348 writer.write((traceid)_thread->osthread()->thread_id());
349 writer.write(thread_name);
350 writer.write(java_lang_thread_id);
351 writer.write(thread_group_id);
352 JfrThreadGroup::serialize(&writer, thread_group_id);
353 }
354