1 /*
2 * Copyright (c) 2016, 2019, 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.hpp"
27 #include "code/codeBlob.hpp"
28 #include "code/codeCache.hpp"
29 #include "gc_interface/gcCause.hpp"
30 #include "gc_interface/gcName.hpp"
31 #include "gc_implementation/shared/gcTrace.hpp"
32 #include "gc_implementation/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/mutexLocker.hpp"
47 #include "runtime/osThread.hpp"
48 #include "runtime/safepoint.hpp"
49 #include "runtime/synchronizer.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vm_operations.hpp"
52
53 #ifdef COMPILER2
54 #include "opto/compile.hpp"
55 #include "opto/node.hpp"
56 #endif
57 #if INCLUDE_ALL_GCS
58 #include "gc_implementation/g1/g1HeapRegionTraceType.hpp"
59 #include "gc_implementation/g1/g1YCTypes.hpp"
60 #endif
61
62 // Requires a ResourceMark for get_thread_name/as_utf8
63 class JfrCheckpointThreadClosure : public ThreadClosure {
64 private:
65 JfrCheckpointWriter& _writer;
66 JfrCheckpointContext _ctx;
67 const int64_t _count_position;
68 Thread* const _curthread;
69 u4 _count;
70
71 public:
72 JfrCheckpointThreadClosure(JfrCheckpointWriter& writer) : _writer(writer),
73 _ctx(writer.context()),
74 _count_position(writer.reserve(sizeof(u4))),
75 _curthread(Thread::current()),
76 _count(0) {
77 }
78
79 ~JfrCheckpointThreadClosure() {
80 if (_count == 0) {
81 // restore
82 _writer.set_context(_ctx);
83 return;
84 }
85 _writer.write_count(_count, _count_position);
86 }
87
88 void do_thread(Thread* t);
89 };
90
91 // Requires a ResourceMark for get_thread_name/as_utf8
92 void JfrCheckpointThreadClosure::do_thread(Thread* t) {
93 assert(t != NULL, "invariant");
94 assert_locked_or_safepoint(Threads_lock);
95 const JfrThreadLocal* const tl = t->jfr_thread_local();
96 assert(tl != NULL, "invariant");
97 if (tl->is_dead()) {
98 return;
99 }
100 ++_count;
101 _writer.write_key(tl->thread_id());
102 _writer.write(t->name());
103 const OSThread* const os_thread = t->osthread();
104 _writer.write<traceid>(os_thread != NULL ? os_thread->thread_id() : 0);
105 if (t->is_Java_thread()) {
106 JavaThread* const jt = (JavaThread*)t;
107 _writer.write(jt->name());
108 _writer.write(java_lang_Thread::thread_id(jt->threadObj()));
109 _writer.write(JfrThreadGroup::thread_group_id(jt, _curthread));
110 // since we are iterating threads during a safepoint, also issue notification
111 JfrJavaEventWriter::notify(jt);
112 return;
113 }
114 _writer.write((const char*)NULL); // java name
115 _writer.write((traceid)0); // java thread id
116 _writer.write((traceid)0); // java thread group
117 }
118
119 void JfrThreadConstantSet::serialize(JfrCheckpointWriter& writer) {
120 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
121 JfrCheckpointThreadClosure tc(writer);
122 Threads::threads_do(&tc);
123 }
124
125 void JfrThreadGroupConstant::serialize(JfrCheckpointWriter& writer) {
126 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
127 JfrThreadGroup::serialize(writer);
128 }
129
130 static const char* flag_value_origin_to_string(Flag::Flags origin) {
131 switch (origin) {
132 case Flag::DEFAULT: return "Default";
133 case Flag::COMMAND_LINE: return "Command line";
134 case Flag::ENVIRON_VAR: return "Environment variable";
135 case Flag::CONFIG_FILE: return "Config file";
136 case Flag::MANAGEMENT: return "Management";
137 case Flag::ERGONOMIC: return "Ergonomic";
138 case Flag::ATTACH_ON_DEMAND: return "Attach on demand";
139 case Flag::INTERNAL: return "Internal";
140 default: ShouldNotReachHere(); return "";
141 }
142 }
143
144 void FlagValueOriginConstant::serialize(JfrCheckpointWriter& writer) {
145 static const u4 nof_entries = Flag::LAST_VALUE_ORIGIN + 1;
146 writer.write_count(nof_entries);
147 for (u4 i = 0; i < nof_entries; ++i) {
148 writer.write_key(i);
149 writer.write(flag_value_origin_to_string((Flag::Flags)i));
150 }
151 }
152
153 void MonitorInflateCauseConstant::serialize(JfrCheckpointWriter& writer) {
154 static const u4 nof_entries = ObjectSynchronizer::inflate_cause_nof;
155 writer.write_count(nof_entries);
156 for (u4 i = 0; i < nof_entries; ++i) {
157 writer.write_key(i);
158 writer.write(ObjectSynchronizer::inflate_cause_name((ObjectSynchronizer::InflateCause)i));
159 }
160 }
161
162 void GCCauseConstant::serialize(JfrCheckpointWriter& writer) {
163 static const u4 nof_entries = GCCause::_last_gc_cause;
164 writer.write_count(nof_entries);
165 for (u4 i = 0; i < nof_entries; ++i) {
166 writer.write_key(i);
167 writer.write(GCCause::to_string((GCCause::Cause)i));
168 }
169 }
170
171 void GCNameConstant::serialize(JfrCheckpointWriter& writer) {
172 static const u4 nof_entries = GCNameEndSentinel;
173 writer.write_count(nof_entries);
174 for (u4 i = 0; i < nof_entries; ++i) {
175 writer.write_key(i);
176 writer.write(GCNameHelper::to_string((GCName)i));
177 }
178 }
179
180 void GCWhenConstant::serialize(JfrCheckpointWriter& writer) {
181 static const u4 nof_entries = GCWhen::GCWhenEndSentinel;
182 writer.write_count(nof_entries);
183 for (u4 i = 0; i < nof_entries; ++i) {
184 writer.write_key(i);
185 writer.write(GCWhen::to_string((GCWhen::Type)i));
186 }
187 }
188
189 void G1HeapRegionTypeConstant::serialize(JfrCheckpointWriter& writer) {
190 static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
191 writer.write_count(nof_entries);
192 for (u4 i = 0; i < nof_entries; ++i) {
193 writer.write_key(i);
194 writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
195 }
196 }
197
198 void GCThresholdUpdaterConstant::serialize(JfrCheckpointWriter& writer) {
199 static const u4 nof_entries = MetaspaceGCThresholdUpdater::Last;
200 writer.write_count(nof_entries);
201 for (u4 i = 0; i < nof_entries; ++i) {
202 writer.write_key(i);
203 writer.write(MetaspaceGCThresholdUpdater::to_string((MetaspaceGCThresholdUpdater::Type)i));
204 }
205 }
206
207 void MetadataTypeConstant::serialize(JfrCheckpointWriter& writer) {
208 static const u4 nof_entries = Metaspace::MetadataTypeCount;
209 writer.write_count(nof_entries);
210 for (u4 i = 0; i < nof_entries; ++i) {
211 writer.write_key(i);
212 writer.write(Metaspace::metadata_type_name((Metaspace::MetadataType)i));
213 }
214 }
215
216 void MetaspaceObjectTypeConstant::serialize(JfrCheckpointWriter& writer) {
217 static const u4 nof_entries = MetaspaceObj::_number_of_types;
218 writer.write_count(nof_entries);
219 for (u4 i = 0; i < nof_entries; ++i) {
220 writer.write_key(i);
221 writer.write(MetaspaceObj::type_name((MetaspaceObj::Type)i));
222 }
223 }
224
225 void G1YCTypeConstant::serialize(JfrCheckpointWriter& writer) {
226 #if INCLUDE_ALL_GCS
227 static const u4 nof_entries = G1YCTypeEndSentinel;
228 writer.write_count(nof_entries);
229 for (u4 i = 0; i < nof_entries; ++i) {
230 writer.write_key(i);
231 writer.write(G1YCTypeHelper::to_string((G1YCType)i));
232 }
233 #endif
234 }
235
236 static const char* reference_type_to_string(ReferenceType rt) {
237 switch (rt) {
238 case REF_NONE: return "None reference";
239 case REF_OTHER: return "Other reference";
240 case REF_SOFT: return "Soft reference";
241 case REF_WEAK: return "Weak reference";
242 case REF_FINAL: return "Final reference";
243 case REF_PHANTOM: return "Phantom reference";
244 default:
245 ShouldNotReachHere();
246 return NULL;
247 }
248 }
249
250 void ReferenceTypeConstant::serialize(JfrCheckpointWriter& writer) {
251 static const u4 nof_entries = REF_PHANTOM + 1;
252 writer.write_count(nof_entries);
253 for (u4 i = 0; i < nof_entries; ++i) {
254 writer.write_key(i);
255 writer.write(reference_type_to_string((ReferenceType)i));
256 }
257 }
258
259 void NarrowOopModeConstant::serialize(JfrCheckpointWriter& writer) {
260 static const u4 nof_entries = Universe::HeapBasedNarrowOop + 1;
261 writer.write_count(nof_entries);
262 for (u4 i = 0; i < nof_entries; ++i) {
263 writer.write_key(i);
264 writer.write(Universe::narrow_oop_mode_to_string((Universe::NARROW_OOP_MODE)i));
265 }
266 }
267
268 void CompilerPhaseTypeConstant::serialize(JfrCheckpointWriter& writer) {
269 #ifdef COMPILER2
270 static const u4 nof_entries = PHASE_NUM_TYPES;
271 writer.write_count(nof_entries);
272 for (u4 i = 0; i < nof_entries; ++i) {
273 writer.write_key(i);
274 writer.write(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i));
275 }
276 #endif
277 }
278
279 void CodeBlobTypeConstant::serialize(JfrCheckpointWriter& writer) {
280 static const u4 nof_entries = CodeBlobType::NumTypes;
281 writer.write_count(nof_entries);
282 writer.write_key((u4)CodeBlobType::All);
283 writer.write("CodeCache");
284 };
285
286 void VMOperationTypeConstant::serialize(JfrCheckpointWriter& writer) {
287 static const u4 nof_entries = VM_Operation::VMOp_Terminating;
288 writer.write_count(nof_entries);
289 for (u4 i = 0; i < nof_entries; ++i) {
290 writer.write_key(i);
291 writer.write(VM_Operation::name(VM_Operation::VMOp_Type(i)));
292 }
293 }
294
295 class TypeSetSerialization {
296 private:
297 bool _class_unload;
298 public:
299 explicit TypeSetSerialization(bool class_unload) : _class_unload(class_unload) {}
300 void write(JfrCheckpointWriter& writer, JfrCheckpointWriter* leakp_writer) {
301 JfrTypeSet::serialize(&writer, leakp_writer, _class_unload);
302 }
303 };
304
305 void ClassUnloadTypeSet::serialize(JfrCheckpointWriter& writer) {
306 TypeSetSerialization type_set(true);
307 if (LeakProfiler::is_running()) {
308 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
309 type_set.write(writer, &leakp_writer);
310 ObjectSampleCheckpoint::install(leakp_writer, true, true);
311 return;
312 }
313 type_set.write(writer, NULL);
314 };
315
316 void TypeSet::serialize(JfrCheckpointWriter& writer) {
317 TypeSetSerialization type_set(false);
318 if (LeakProfiler::is_running()) {
319 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
320 type_set.write(writer, &leakp_writer);
321 ObjectSampleCheckpoint::install(leakp_writer, false, true);
322 return;
323 }
324 type_set.write(writer, NULL);
325 };
326
327 void ThreadStateConstant::serialize(JfrCheckpointWriter& writer) {
328 JfrThreadState::serialize(writer);
329 }
330
331 void JfrThreadConstant::serialize(JfrCheckpointWriter& writer) {
332 assert(_thread != NULL, "invariant");
333 assert(_thread == Thread::current(), "invariant");
334 assert(_thread->is_Java_thread(), "invariant");
335 assert(!_thread->jfr_thread_local()->has_thread_checkpoint(), "invariant");
336 ResourceMark rm(_thread);
337 const oop threadObj = _thread->threadObj();
338 assert(threadObj != NULL, "invariant");
339 const u8 java_lang_thread_id = java_lang_Thread::thread_id(threadObj);
340 const char* const thread_name = _thread->name();
341 const traceid thread_group_id = JfrThreadGroup::thread_group_id(_thread);
342 writer.write_count(1);
343 writer.write_key(_thread->jfr_thread_local()->thread_id());
344 writer.write(thread_name);
345 writer.write((traceid)_thread->osthread()->thread_id());
346 writer.write(thread_name);
347 writer.write(java_lang_thread_id);
348 writer.write(thread_group_id);
349 JfrThreadGroup::serialize(&writer, thread_group_id);
350 }