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 static const u4 nof_entries = G1HeapRegionTraceType::G1HeapRegionTypeEndSentinel; 192 writer.write_count(nof_entries); 193 for (u4 i = 0; i < nof_entries; ++i) { 194 writer.write_key(i); 195 writer.write(G1HeapRegionTraceType::to_string((G1HeapRegionTraceType::Type)i)); 196 } 197 } 198 199 void GCThresholdUpdaterConstant::serialize(JfrCheckpointWriter& writer) { 200 static const u4 nof_entries = MetaspaceGCThresholdUpdater::Last; 201 writer.write_count(nof_entries); 202 for (u4 i = 0; i < nof_entries; ++i) { 203 writer.write_key(i); 204 writer.write(MetaspaceGCThresholdUpdater::to_string((MetaspaceGCThresholdUpdater::Type)i)); 205 } 206 } 207 208 void MetadataTypeConstant::serialize(JfrCheckpointWriter& writer) { 209 static const u4 nof_entries = Metaspace::MetadataTypeCount; 210 writer.write_count(nof_entries); 211 for (u4 i = 0; i < nof_entries; ++i) { 212 writer.write_key(i); 213 writer.write(Metaspace::metadata_type_name((Metaspace::MetadataType)i)); 214 } 215 } 216 217 void MetaspaceObjectTypeConstant::serialize(JfrCheckpointWriter& writer) { 218 static const u4 nof_entries = MetaspaceObj::_number_of_types; 219 writer.write_count(nof_entries); 220 for (u4 i = 0; i < nof_entries; ++i) { 221 writer.write_key(i); 222 writer.write(MetaspaceObj::type_name((MetaspaceObj::Type)i)); 223 } 224 } 225 226 void G1YCTypeConstant::serialize(JfrCheckpointWriter& writer) { 227 #if INCLUDE_G1GC 228 static const u4 nof_entries = G1YCTypeEndSentinel; 229 writer.write_count(nof_entries); 230 for (u4 i = 0; i < nof_entries; ++i) { 231 writer.write_key(i); 232 writer.write(G1YCTypeHelper::to_string((G1YCType)i)); 233 } 234 #endif 235 } 236 237 static const char* reference_type_to_string(ReferenceType rt) { 238 switch (rt) { 239 case REF_NONE: return "None reference"; 240 case REF_OTHER: return "Other reference"; 241 case REF_SOFT: return "Soft reference"; 242 case REF_WEAK: return "Weak reference"; 243 case REF_FINAL: return "Final reference"; 244 case REF_PHANTOM: return "Phantom reference"; 245 default: 246 ShouldNotReachHere(); 247 return NULL; 248 } 249 } 250 251 void ReferenceTypeConstant::serialize(JfrCheckpointWriter& writer) { 252 static const u4 nof_entries = REF_PHANTOM + 1; 253 writer.write_count(nof_entries); 254 for (u4 i = 0; i < nof_entries; ++i) { 255 writer.write_key(i); 256 writer.write(reference_type_to_string((ReferenceType)i)); 257 } 258 } 259 260 void NarrowOopModeConstant::serialize(JfrCheckpointWriter& writer) { 261 static const u4 nof_entries = Universe::HeapBasedNarrowOop + 1; 262 writer.write_count(nof_entries); 263 for (u4 i = 0; i < nof_entries; ++i) { 264 writer.write_key(i); 265 writer.write(Universe::narrow_oop_mode_to_string((Universe::NARROW_OOP_MODE)i)); 266 } 267 } 268 269 void CompilerPhaseTypeConstant::serialize(JfrCheckpointWriter& writer) { 270 #ifdef COMPILER2 271 static const u4 nof_entries = PHASE_NUM_TYPES; 272 writer.write_count(nof_entries); 273 for (u4 i = 0; i < nof_entries; ++i) { 274 writer.write_key(i); 275 writer.write(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i)); 276 } 277 #endif 278 } 279 280 void CodeBlobTypeConstant::serialize(JfrCheckpointWriter& writer) { 281 static const u4 nof_entries = CodeBlobType::NumTypes; 282 writer.write_count(nof_entries); 283 for (u4 i = 0; i < nof_entries; ++i) { 284 writer.write_key(i); 285 writer.write(CodeCache::get_code_heap_name(i)); 286 } 287 }; 288 289 void VMOperationTypeConstant::serialize(JfrCheckpointWriter& writer) { 290 static const u4 nof_entries = VM_Operation::VMOp_Terminating; 291 writer.write_count(nof_entries); 292 for (u4 i = 0; i < nof_entries; ++i) { 293 writer.write_key(i); 294 writer.write(VM_Operation::name(VM_Operation::VMOp_Type(i))); 295 } 296 } 297 298 class TypeSetSerialization { 299 private: 300 bool _class_unload; 301 public: 302 explicit TypeSetSerialization(bool class_unload) : _class_unload(class_unload) {} 303 void write(JfrCheckpointWriter& writer, JfrCheckpointWriter* leakp_writer) { 304 JfrTypeSet::serialize(&writer, leakp_writer, _class_unload); 305 } 306 }; 307 308 void ClassUnloadTypeSet::serialize(JfrCheckpointWriter& writer) { 309 TypeSetSerialization type_set(true); 310 if (LeakProfiler::is_running()) { 311 JfrCheckpointWriter leakp_writer(false, true, Thread::current()); 312 type_set.write(writer, &leakp_writer); 313 ObjectSampleCheckpoint::install(leakp_writer, true, true); 314 return; 315 } 316 type_set.write(writer, NULL); 317 }; 318 319 void TypeSet::serialize(JfrCheckpointWriter& writer) { 320 TypeSetSerialization type_set(false); 321 if (LeakProfiler::is_suspended()) { 322 JfrCheckpointWriter leakp_writer(false, true, Thread::current()); 323 type_set.write(writer, &leakp_writer); 324 ObjectSampleCheckpoint::install(leakp_writer, false, true); 325 return; 326 } 327 type_set.write(writer, NULL); 328 }; 329 330 void ThreadStateConstant::serialize(JfrCheckpointWriter& writer) { 331 JfrThreadState::serialize(writer); 332 } 333 334 void JfrThreadConstant::serialize(JfrCheckpointWriter& writer) { 335 assert(_thread != NULL, "invariant"); 336 assert(_thread == Thread::current(), "invariant"); 337 assert(_thread->is_Java_thread(), "invariant"); 338 assert(!_thread->jfr_thread_local()->has_thread_checkpoint(), "invariant"); 339 ResourceMark rm(_thread); 340 const oop threadObj = _thread->threadObj(); 341 assert(threadObj != NULL, "invariant"); 342 const u8 java_lang_thread_id = java_lang_Thread::thread_id(threadObj); 343 const char* const thread_name = _thread->name(); 344 const traceid thread_group_id = JfrThreadGroup::thread_group_id(_thread); 345 writer.write_count(1); 346 writer.write_key(_thread->jfr_thread_local()->thread_id()); 347 writer.write(thread_name); 348 writer.write((traceid)_thread->osthread()->thread_id()); 349 writer.write(thread_name); 350 writer.write(java_lang_thread_id); 351 writer.write(thread_group_id); 352 JfrThreadGroup::serialize(&writer, thread_group_id); 353 }