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/metaspace.hpp"
44 #include "memory/metaspace/metaspaceEnums.hpp"
45 #include "memory/referenceType.hpp"
46 #include "memory/universe.hpp"
47 #include "oops/compressedOops.hpp"
48 #include "runtime/flags/jvmFlag.hpp"
49 #include "runtime/mutexLocker.hpp"
50 #include "runtime/osThread.hpp"
51 #include "runtime/safepoint.hpp"
52 #include "runtime/synchronizer.hpp"
53 #include "runtime/thread.inline.hpp"
54 #include "runtime/vmOperations.hpp"
55
56 #ifdef COMPILER2
57 #include "opto/compile.hpp"
58 #include "opto/node.hpp"
59 #endif
60 #if INCLUDE_G1GC
61 #include "gc/g1/g1HeapRegionTraceType.hpp"
62 #include "gc/g1/g1YCTypes.hpp"
63 #endif
64
65 // Requires a ResourceMark for get_thread_name/as_utf8
66 class JfrCheckpointThreadClosure : public ThreadClosure {
67 private:
68 JfrCheckpointWriter& _writer;
69 JfrCheckpointContext _ctx;
70 const int64_t _count_position;
71 Thread* const _curthread;
72 u4 _count;
73
74 public:
75 JfrCheckpointThreadClosure(JfrCheckpointWriter& writer) : _writer(writer),
76 _ctx(writer.context()),
77 _count_position(writer.reserve(sizeof(u4))),
78 _curthread(Thread::current()),
79 _count(0) {
80 }
81
82 ~JfrCheckpointThreadClosure() {
83 if (_count == 0) {
84 // restore
85 _writer.set_context(_ctx);
86 return;
87 }
88 _writer.write_count(_count, _count_position);
89 }
90
91 void do_thread(Thread* t);
92 };
93
94 // Requires a ResourceMark for get_thread_name/as_utf8
95 void JfrCheckpointThreadClosure::do_thread(Thread* t) {
96 assert(t != NULL, "invariant");
97 assert_locked_or_safepoint(Threads_lock);
98 const JfrThreadLocal* const tl = t->jfr_thread_local();
99 assert(tl != NULL, "invariant");
100 if (tl->is_dead()) {
101 return;
102 }
103 ++_count;
104 _writer.write_key(tl->thread_id());
105 _writer.write(t->name());
106 const OSThread* const os_thread = t->osthread();
107 _writer.write<traceid>(os_thread != NULL ? os_thread->thread_id() : 0);
108 if (t->is_Java_thread()) {
109 JavaThread* const jt = (JavaThread*)t;
110 _writer.write(jt->name());
111 _writer.write(java_lang_Thread::thread_id(jt->threadObj()));
112 _writer.write(JfrThreadGroup::thread_group_id(jt, _curthread));
113 // since we are iterating threads during a safepoint, also issue notification
114 JfrJavaEventWriter::notify(jt);
115 return;
116 }
117 _writer.write((const char*)NULL); // java name
118 _writer.write((traceid)0); // java thread id
119 _writer.write((traceid)0); // java thread group
120 }
121
122 void JfrThreadConstantSet::serialize(JfrCheckpointWriter& writer) {
123 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
124 JfrCheckpointThreadClosure tc(writer);
125 Threads::threads_do(&tc);
126 }
127
128 void JfrThreadGroupConstant::serialize(JfrCheckpointWriter& writer) {
129 assert(SafepointSynchronize::is_at_safepoint(), "invariant");
130 JfrThreadGroup::serialize(writer);
131 }
132
133 static const char* flag_value_origin_to_string(JVMFlag::Flags origin) {
134 switch (origin) {
135 case JVMFlag::DEFAULT: return "Default";
136 case JVMFlag::COMMAND_LINE: return "Command line";
137 case JVMFlag::ENVIRON_VAR: return "Environment variable";
138 case JVMFlag::CONFIG_FILE: return "Config file";
139 case JVMFlag::MANAGEMENT: return "Management";
140 case JVMFlag::ERGONOMIC: return "Ergonomic";
141 case JVMFlag::ATTACH_ON_DEMAND: return "Attach on demand";
142 case JVMFlag::INTERNAL: return "Internal";
143 default: ShouldNotReachHere(); return "";
144 }
145 }
146
147 void FlagValueOriginConstant::serialize(JfrCheckpointWriter& writer) {
148 static const u4 nof_entries = JVMFlag::LAST_VALUE_ORIGIN + 1;
149 writer.write_count(nof_entries);
150 for (u4 i = 0; i < nof_entries; ++i) {
151 writer.write_key(i);
152 writer.write(flag_value_origin_to_string((JVMFlag::Flags)i));
153 }
154 }
155
156 void MonitorInflateCauseConstant::serialize(JfrCheckpointWriter& writer) {
157 static const u4 nof_entries = ObjectSynchronizer::inflate_cause_nof;
158 writer.write_count(nof_entries);
159 for (u4 i = 0; i < nof_entries; ++i) {
160 writer.write_key(i);
161 writer.write(ObjectSynchronizer::inflate_cause_name((ObjectSynchronizer::InflateCause)i));
162 }
163 }
164
165 void GCCauseConstant::serialize(JfrCheckpointWriter& writer) {
166 static const u4 nof_entries = GCCause::_last_gc_cause;
167 writer.write_count(nof_entries);
168 for (u4 i = 0; i < nof_entries; ++i) {
169 writer.write_key(i);
170 writer.write(GCCause::to_string((GCCause::Cause)i));
171 }
172 }
173
174 void GCNameConstant::serialize(JfrCheckpointWriter& writer) {
175 static const u4 nof_entries = GCNameEndSentinel;
176 writer.write_count(nof_entries);
177 for (u4 i = 0; i < nof_entries; ++i) {
178 writer.write_key(i);
179 writer.write(GCNameHelper::to_string((GCName)i));
180 }
181 }
182
183 void GCWhenConstant::serialize(JfrCheckpointWriter& writer) {
184 static const u4 nof_entries = GCWhen::GCWhenEndSentinel;
185 writer.write_count(nof_entries);
186 for (u4 i = 0; i < nof_entries; ++i) {
187 writer.write_key(i);
188 writer.write(GCWhen::to_string((GCWhen::Type)i));
189 }
190 }
191
192 void G1HeapRegionTypeConstant::serialize(JfrCheckpointWriter& writer) {
193 static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel;
194 writer.write_count(nof_entries);
195 for (u4 i = 0; i < nof_entries; ++i) {
196 writer.write_key(i);
197 writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i));
198 }
199 }
200
201 void GCThresholdUpdaterConstant::serialize(JfrCheckpointWriter& writer) {
202 static const u4 nof_entries = MetaspaceGCThresholdUpdater::Last;
203 writer.write_count(nof_entries);
204 for (u4 i = 0; i < nof_entries; ++i) {
205 writer.write_key(i);
206 writer.write(MetaspaceGCThresholdUpdater::to_string((MetaspaceGCThresholdUpdater::Type)i));
207 }
208 }
209
210 void MetadataTypeConstant::serialize(JfrCheckpointWriter& writer) {
211 static const u4 nof_entries = metaspace::MetadataTypeCount;
212 writer.write_count(nof_entries);
213 for (u4 i = 0; i < nof_entries; ++i) {
214 writer.write_key(i);
215 writer.write(metaspace::describe_mdtype((metaspace::MetadataType)i));
216 }
217 }
218
219 void MetaspaceObjectTypeConstant::serialize(JfrCheckpointWriter& writer) {
220 static const u4 nof_entries = MetaspaceObj::_number_of_types;
221 writer.write_count(nof_entries);
222 for (u4 i = 0; i < nof_entries; ++i) {
223 writer.write_key(i);
224 writer.write(MetaspaceObj::type_name((MetaspaceObj::Type)i));
225 }
226 }
227
228 void G1YCTypeConstant::serialize(JfrCheckpointWriter& writer) {
229 #if INCLUDE_G1GC
230 static const u4 nof_entries = G1YCTypeEndSentinel;
231 writer.write_count(nof_entries);
232 for (u4 i = 0; i < nof_entries; ++i) {
233 writer.write_key(i);
234 writer.write(G1YCTypeHelper::to_string((G1YCType)i));
235 }
236 #endif
237 }
238
239 static const char* reference_type_to_string(ReferenceType rt) {
240 switch (rt) {
241 case REF_NONE: return "None reference";
242 case REF_OTHER: return "Other reference";
243 case REF_SOFT: return "Soft reference";
244 case REF_WEAK: return "Weak reference";
245 case REF_FINAL: return "Final reference";
246 case REF_PHANTOM: return "Phantom reference";
247 default:
248 ShouldNotReachHere();
249 return NULL;
250 }
251 }
252
253 void ReferenceTypeConstant::serialize(JfrCheckpointWriter& writer) {
254 static const u4 nof_entries = REF_PHANTOM + 1;
255 writer.write_count(nof_entries);
256 for (u4 i = 0; i < nof_entries; ++i) {
257 writer.write_key(i);
258 writer.write(reference_type_to_string((ReferenceType)i));
259 }
260 }
261
262 void NarrowOopModeConstant::serialize(JfrCheckpointWriter& writer) {
263 static const u4 nof_entries = CompressedOops::HeapBasedNarrowOop + 1;
264 writer.write_count(nof_entries);
265 for (u4 i = 0; i < nof_entries; ++i) {
266 writer.write_key(i);
267 writer.write(CompressedOops::mode_to_string((CompressedOops::Mode)i));
268 }
269 }
270
271 void CompilerPhaseTypeConstant::serialize(JfrCheckpointWriter& writer) {
272 #ifdef COMPILER2
273 static const u4 nof_entries = PHASE_NUM_TYPES;
274 writer.write_count(nof_entries);
275 for (u4 i = 0; i < nof_entries; ++i) {
276 writer.write_key(i);
277 writer.write(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i));
278 }
279 #endif
280 }
281
282 void CodeBlobTypeConstant::serialize(JfrCheckpointWriter& writer) {
283 static const u4 nof_entries = CodeBlobType::NumTypes;
284 writer.write_count(nof_entries);
285 for (u4 i = 0; i < nof_entries; ++i) {
286 writer.write_key(i);
287 writer.write(CodeCache::get_code_heap_name(i));
288 }
289 };
290
291 void VMOperationTypeConstant::serialize(JfrCheckpointWriter& writer) {
292 static const u4 nof_entries = VM_Operation::VMOp_Terminating;
293 writer.write_count(nof_entries);
294 for (u4 i = 0; i < nof_entries; ++i) {
295 writer.write_key(i);
296 writer.write(VM_Operation::name(VM_Operation::VMOp_Type(i)));
297 }
298 }
299
300 class TypeSetSerialization {
301 private:
302 bool _class_unload;
303 public:
304 explicit TypeSetSerialization(bool class_unload) : _class_unload(class_unload) {}
305 void write(JfrCheckpointWriter& writer, JfrCheckpointWriter* leakp_writer) {
306 JfrTypeSet::serialize(&writer, leakp_writer, _class_unload);
307 }
308 };
309
310 void ClassUnloadTypeSet::serialize(JfrCheckpointWriter& writer) {
311 TypeSetSerialization type_set(true);
312 if (LeakProfiler::is_running()) {
313 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
314 type_set.write(writer, &leakp_writer);
315 ObjectSampleCheckpoint::install(leakp_writer, true);
316 return;
317 }
318 type_set.write(writer, NULL);
319 };
320
321 void TypeSet::serialize(JfrCheckpointWriter& writer) {
322 TypeSetSerialization type_set(false);
323 if (LeakProfiler::is_running()) {
324 JfrCheckpointWriter leakp_writer(false, true, Thread::current());
325 type_set.write(writer, &leakp_writer);
326 ObjectSampleCheckpoint::install(leakp_writer, false);
327 return;
328 }
329 type_set.write(writer, NULL);
330 };
331
332 void ThreadStateConstant::serialize(JfrCheckpointWriter& writer) {
333 JfrThreadState::serialize(writer);
334 }
335
336 void JfrThreadConstant::serialize(JfrCheckpointWriter& writer) {
337 assert(_thread != NULL, "invariant");
338 assert(_thread == Thread::current(), "invariant");
339 assert(_thread->is_Java_thread(), "invariant");
340 assert(!_thread->jfr_thread_local()->has_thread_checkpoint(), "invariant");
341 ResourceMark rm(_thread);
342 const oop threadObj = _thread->threadObj();
343 assert(threadObj != NULL, "invariant");
344 const u8 java_lang_thread_id = java_lang_Thread::thread_id(threadObj);
345 const char* const thread_name = _thread->name();
346 const traceid thread_group_id = JfrThreadGroup::thread_group_id(_thread);
347 writer.write_count(1);
348 writer.write_key(_thread->jfr_thread_local()->thread_id());
349 writer.write(thread_name);
350 writer.write((traceid)_thread->osthread()->thread_id());
351 writer.write(thread_name);
352 writer.write(java_lang_thread_id);
353 writer.write(thread_group_id);
354 JfrThreadGroup::serialize(&writer, thread_group_id);
355 }