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