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/recorder/access/jfrThreadData.hpp"
34 #include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
35 #include "jfr/recorder/checkpoint/constant/jfrConstant.hpp"
36 #include "jfr/recorder/jfrRecorder.hpp"
37 #include "jfr/recorder/checkpoint/constant/jfrTagSet.hpp"
38 #include "jfr/recorder/checkpoint/constant/jfrThreadGroup.hpp"
39 #include "jfr/leakprofiler/checkpoint/objectSampleCheckpoint.hpp"
40 #include "jfr/leakprofiler/leakProfiler.hpp"
41 #include "jfr/writers/jfrJavaEventWriter.hpp"
42 #include "memory/metaspaceGCThresholdUpdater.hpp"
43 #include "memory/referenceType.hpp"
44 #include "memory/universe.hpp"
45 #include "runtime/mutexLocker.hpp"
46 #include "runtime/osThread.hpp"
47 #include "runtime/safepoint.hpp"
48 #include "runtime/synchronizer.hpp"
49 #include "runtime/thread.inline.hpp"
50 #include "runtime/vm_operations.hpp"
51 #include "trace/traceVM.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 // implementation for the static registration function exposed in the api
63 bool JfrConstantSerializer::register_serializer(JfrConstantTypeId id, bool require_safepoint, bool permit_cache, JfrConstantSerializer* cs) {
64 assert(cs != NULL, "invariant");
65 return JfrCheckpointManager::register_serializer(id, require_safepoint, permit_cache, cs);
66 }
67
68 class JfrCheckpointThreadCountClosure : public ThreadClosure {
69 private:
70 u4 _total_threads;
71 public:
72 JfrCheckpointThreadCountClosure() : _total_threads(0) {}
73 u4 total_threads() { return _total_threads; }
74 void do_thread(Thread *t) { _total_threads++; }
75 };
76
77 // Requires a ResourceMark for get_thread_name/as_utf8
78 class JfrCheckpointThreadClosure : public ThreadClosure {
79 private:
80 JfrCheckpointWriter& _writer;
81 Thread* _curthread;
82 public:
83 JfrCheckpointThreadClosure(JfrCheckpointWriter& writer) : _writer(writer), _curthread(Thread::current()) {}
84 void do_thread(Thread* t);
85 };
86
87 // Requires a ResourceMark for get_thread_name/as_utf8
88 void JfrCheckpointThreadClosure::do_thread(Thread* t) {
89 assert(t != NULL, "invariant");
90 assert_locked_or_safepoint(Threads_lock);
91 _writer.write_key(t->trace_data()->thread_id());
92 _writer.write(t->name());
93 const OSThread* const os_thread = t->osthread();
94 _writer.write<traceid>(os_thread != NULL ? os_thread->thread_id() : (u8)0);
95 if (t->is_Java_thread()) {
96 JavaThread* const jt = (JavaThread*)t;
97 _writer.write(jt->name());
98 _writer.write(java_lang_Thread::thread_id(jt->threadObj()));
99 _writer.write(JfrThreadGroup::thread_group_id(jt, _curthread));
100 // since we are iterating threads during a safepoint, also issue notification
101 JfrJavaEventWriter::notify(jt);
102 return;
103 }
104 _writer.write((const char*)NULL); // java name
105 _writer.write<traceid>((traceid)0); // java thread id
106 _writer.write<traceid>((traceid)0); // java thread group
107 }
108
109 void JfrThreadConstantSet::write_constants(JfrCheckpointWriter& writer) {
110 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
111 JfrCheckpointThreadCountClosure tcc;
112 Threads::threads_do(&tcc);
113 const u4 total_threads = tcc.total_threads();
114 // THREADS
115 writer.write_number_of_constants(total_threads);
116 JfrCheckpointThreadClosure tc(writer);
117 Threads::threads_do(&tc);
118 }
119
120 void JfrThreadGroupConstant::write_constants(JfrCheckpointWriter& writer) {
121 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
122 JfrThreadGroup::write(writer);
123 }
124
125 static const char* flag_value_origin_to_string(Flag::Flags origin) {
126 switch (origin) {
127 case Flag::DEFAULT: return "Default";
128 case Flag::COMMAND_LINE: return "Command line";
129 case Flag::ENVIRON_VAR: return "Environment variable";
130 case Flag::CONFIG_FILE: return "Config file";
131 case Flag::MANAGEMENT: return "Management";
132 case Flag::ERGONOMIC: return "Ergonomic";
133 case Flag::ATTACH_ON_DEMAND: return "Attach on demand";
134 case Flag::INTERNAL: return "Internal";
135 default: ShouldNotReachHere(); return "";
136 }
137 }
138
139 void FlagValueOriginConstant::write_constants(JfrCheckpointWriter& writer) {
140 static const u4 nof_entries = Flag::LAST_VALUE_ORIGIN + 1;
141 writer.write_number_of_constants(nof_entries);
142 for (u4 i = 0; i < nof_entries; ++i) {
143 writer.write_key(i);
144 writer.write(flag_value_origin_to_string((Flag::Flags)i));
145 }
146 }
147
148 void GCCauseConstant::write_constants(JfrCheckpointWriter& writer) {
149 static const u4 nof_entries = GCCause::_last_gc_cause;
150 writer.write_number_of_constants(nof_entries);
151 for (u4 i = 0; i < nof_entries; ++i) {
152 writer.write_key(i);
153 writer.write(GCCause::to_string((GCCause::Cause)i));
154 }
155 }
156
157 void GCNameConstant::write_constants(JfrCheckpointWriter& writer) {
158 static const u4 nof_entries = GCNameEndSentinel;
159 writer.write_number_of_constants(nof_entries);
160 for (u4 i = 0; i < nof_entries; ++i) {
161 writer.write_key(i);
162 writer.write(GCNameHelper::to_string((GCName)i));
163 }
164 }
165
166 void GCWhenConstant::write_constants(JfrCheckpointWriter& writer) {
167 static const u4 nof_entries = GCWhen::GCWhenEndSentinel;
168 writer.write_number_of_constants(nof_entries);
169 for (u4 i = 0; i < nof_entries; ++i) {
170 writer.write_key(i);
171 writer.write(GCWhen::to_string((GCWhen::Type)i));
172 }
173 }
174
175 void G1HeapRegionTypeConstant::write_constants(JfrCheckpointWriter& writer) {
176 static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
177 writer.write_number_of_constants(nof_entries);
178 for (u4 i = 0; i < nof_entries; ++i) {
179 writer.write_key(i);
180 writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
181 }
182 }
183
184 void GCThresholdUpdaterConstant::write_constants(JfrCheckpointWriter& writer) {
185 static const u4 nof_entries = MetaspaceGCThresholdUpdater::Last;
186 writer.write_number_of_constants(nof_entries);
187 for (u4 i = 0; i < nof_entries; ++i) {
188 writer.write_key(i);
189 writer.write(MetaspaceGCThresholdUpdater::to_string((MetaspaceGCThresholdUpdater::Type)i));
190 }
191 }
192
193 void MetadataTypeConstant::write_constants(JfrCheckpointWriter& writer) {
194 static const u4 nof_entries = Metaspace::MetadataTypeCount;
195 writer.write_number_of_constants(nof_entries);
196 for (u4 i = 0; i < nof_entries; ++i) {
197 writer.write_key(i);
198 writer.write(Metaspace::metadata_type_name((Metaspace::MetadataType)i));
199 }
200 }
201
202 void MetaspaceObjTypeConstant::write_constants(JfrCheckpointWriter& writer) {
203 static const u4 nof_entries = MetaspaceObj::_number_of_types;
204 writer.write_number_of_constants(nof_entries);
205 for (u4 i = 0; i < nof_entries; ++i) {
206 writer.write_key(i);
207 writer.write(MetaspaceObj::type_name((MetaspaceObj::Type)i));
208 }
209 }
210
211 void G1YCTypeConstant::write_constants(JfrCheckpointWriter& writer) {
212 #if INCLUDE_ALL_GCS
213 static const u4 nof_entries = G1YCTypeEndSentinel;
214 writer.write_number_of_constants(nof_entries);
215 for (u4 i = 0; i < nof_entries; ++i) {
216 writer.write_key(i);
217 writer.write(G1YCTypeHelper::to_string((G1YCType)i));
218 }
219 #endif
220 }
221
222 static const char* reference_type_to_string(ReferenceType rt) {
223 switch (rt) {
224 case REF_NONE: return "None reference";
225 case REF_OTHER: return "Other reference";
226 case REF_SOFT: return "Soft reference";
227 case REF_WEAK: return "Weak reference";
228 case REF_FINAL: return "Final reference";
229 case REF_PHANTOM: return "Phantom reference";
230 default:
231 ShouldNotReachHere();
232 return NULL;
233 }
234 }
235
236 void ReferenceTypeConstant::write_constants(JfrCheckpointWriter& writer) {
237 static const u4 nof_entries = REF_PHANTOM + 1;
238 writer.write_number_of_constants(nof_entries);
239 for (u4 i = 0; i < nof_entries; ++i) {
240 writer.write_key(i);
241 writer.write(reference_type_to_string((ReferenceType)i));
242 }
243 }
244
245 void NarrowOopModeConstant::write_constants(JfrCheckpointWriter& writer) {
246 static const u4 nof_entries = Universe::HeapBasedNarrowOop + 1;
247 writer.write_number_of_constants(nof_entries);
248 for (u4 i = 0; i < nof_entries; ++i) {
249 writer.write_key(i);
250 writer.write(Universe::narrow_oop_mode_to_string((Universe::NARROW_OOP_MODE)i));
251 }
252 }
253
254 void CompilerPhaseTypeConstant::write_constants(JfrCheckpointWriter& writer) {
255 #ifdef COMPILER2
256 static const u4 nof_entries = PHASE_NUM_TYPES;
257 writer.write_number_of_constants(nof_entries);
258 for (u4 i = 0; i < nof_entries; ++i) {
259 writer.write_key(i);
260 writer.write(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i));
261 }
262 #endif
263 }
264
265 void CodeBlobTypeConstant::write_constants(JfrCheckpointWriter& writer) {
266 // only one code blob now in ajdk8
267 static const u4 nof_entries = CodeBlobType::NumTypes;
268 writer.write_number_of_constants(nof_entries);
269 writer.write_key((u4)CodeBlobType::All);
270 writer.write("CodeCache");
271 };
272
273 void VMOperationTypeConstant::write_constants(JfrCheckpointWriter& writer) {
274 static const u4 nof_entries = VM_Operation::VMOp_Terminating;
275 writer.write_number_of_constants(nof_entries);
276 for (u4 i = 0; i < nof_entries; ++i) {
277 writer.write_key(i);
278 writer.write(VM_Operation::name(VM_Operation::VMOp_Type(i)));
279 }
280 }
281
282 class ConstantTagSet {
283 private:
284 bool _class_unload;
285 public:
286 explicit ConstantTagSet(bool class_unload) : _class_unload(class_unload) {}
287 void write(JfrCheckpointWriter& writer, JfrCheckpointWriter* leakp_writer) {
288 JfrTagSet::write(&writer, leakp_writer, _class_unload);
289 }
290 };
291
292 void ClassUnloadConstantSet::write_constants(JfrCheckpointWriter& writer) {
293 ConstantTagSet tag_set(true);
294 if (LeakProfiler::is_running()) {
295 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
296 tag_set.write(writer, &leakp_writer);
297 ObjectSampleCheckpoint::install(leakp_writer, true, true);
298 return;
299 }
300 tag_set.write(writer, NULL);
301 };
302
303 void ConstantSet::write_constants(JfrCheckpointWriter& writer) {
304 ConstantTagSet tag_set(false);
305 if (LeakProfiler::is_suspended()) {
306 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
307 tag_set.write(writer, &leakp_writer);
308 ObjectSampleCheckpoint::install(leakp_writer, false, true);
309 return;
310 }
311 tag_set.write(writer, NULL);
312 };
313
314 void ThreadStateConstant::write_constants(JfrCheckpointWriter& writer) {
315 // Thread states
316 {
317 enum {
318 #define _dummy_enum(n, v) _dummy_##n,
319 MAKE_JAVATHREAD_STATES(_dummy_enum)
320 NUM_JAVATHREAD_STATES
321 };
322
323 writer.write_number_of_constants(NUM_JAVATHREAD_STATES);
324 #define _write_ts(n, v) writer.write<u8>(v); writer.write(#n);
325 MAKE_JAVATHREAD_STATES(_write_ts)
326 }
327 }
328
329 void JfrThreadConstant::write_constants(JfrCheckpointWriter& writer) {
330 assert(_thread != NULL, "invariant");
331 assert(_thread == Thread::current(), "invariant");
332 assert(_thread->is_Java_thread(), "invariant");
333 assert(!_thread->trace_data()->has_thread_checkpoint(), "invariant");
334 ResourceMark rm(_thread);
335 const oop threadObj = _thread->threadObj();
336 assert(threadObj != NULL, "invariant");
337 const u8 java_lang_thread_id = java_lang_Thread::thread_id(threadObj);
338 const char* const thread_name = _thread->name();
339 const traceid thread_group_id = JfrThreadGroup::thread_group_id(_thread);
340 writer.write_number_of_constants(1);
341 writer.write_key(_thread->trace_data()->thread_id());
342 writer.write(thread_name);
343 writer.write((u8)_thread->osthread()->thread_id());
344 writer.write(thread_name);
345 writer.write(java_lang_thread_id);
346 writer.write(thread_group_id);
347 JfrThreadGroup::write(&writer, thread_group_id);
348 }