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/vm_operations.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 intptr_t _count_position; 69 Thread* const _curthread; 70 u4 _count; 71 72 public: 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 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 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 } 119 120 void JfrThreadConstantSet::serialize(JfrCheckpointWriter& writer) { 121 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); 122 JfrCheckpointThreadClosure tc(writer); 123 Threads::threads_do(&tc); 124 } 125 126 void JfrThreadGroupConstant::serialize(JfrCheckpointWriter& writer) { 127 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); 128 JfrThreadGroup::serialize(writer); 129 } 130 131 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 } 144 145 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 } 153 154 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 } 162 163 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 } 171 172 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 } 180 181 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 } 189 190 void G1HeapRegionTypeConstant::serialize(JfrCheckpointWriter& writer) { 191 #if INCLUDE_G1GC 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 #endif 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::metadata_type_name((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 = Universe::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(Universe::narrow_oop_mode_to_string((Universe::NARROW_OOP_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, 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_suspended()) { 324 JfrCheckpointWriter leakp_writer(false, true, Thread::current()); 325 type_set.write(writer, &leakp_writer); 326 ObjectSampleCheckpoint::install(leakp_writer, false, true); 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 }