1 /* 2 * Copyright (c) 2016, 2020, 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/classLoaderDataGraph.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/moduleEntry.hpp" 29 #include "classfile/packageEntry.hpp" 30 #include "classfile/symbolTable.hpp" 31 #include "jfr/jfr.hpp" 32 #include "jfr/jni/jfrGetAllEventClasses.hpp" 33 #include "jfr/leakprofiler/checkpoint/objectSampleCheckpoint.hpp" 34 #include "jfr/recorder/checkpoint/types/jfrTypeSet.hpp" 35 #include "jfr/recorder/checkpoint/types/jfrTypeSetUtils.hpp" 36 #include "jfr/recorder/checkpoint/types/traceid/jfrTraceId.inline.hpp" 37 #include "jfr/utilities/jfrHashtable.hpp" 38 #include "jfr/utilities/jfrTypes.hpp" 39 #include "jfr/writers/jfrTypeWriterHost.hpp" 40 #include "memory/iterator.hpp" 41 #include "memory/resourceArea.hpp" 42 #include "oops/instanceKlass.hpp" 43 #include "oops/objArrayKlass.hpp" 44 #include "oops/oop.inline.hpp" 45 #include "utilities/accessFlags.hpp" 46 #include "utilities/bitMap.inline.hpp" 47 48 typedef const Klass* KlassPtr; 49 typedef const PackageEntry* PkgPtr; 50 typedef const ModuleEntry* ModPtr; 51 typedef const ClassLoaderData* CldPtr; 52 typedef const Method* MethodPtr; 53 typedef const Symbol* SymbolPtr; 54 typedef const JfrSymbolId::SymbolEntry* SymbolEntryPtr; 55 typedef const JfrSymbolId::CStringEntry* CStringEntryPtr; 56 57 static JfrCheckpointWriter* _writer = NULL; 58 static JfrCheckpointWriter* _leakp_writer = NULL; 59 static JfrArtifactSet* _artifacts = NULL; 60 static JfrArtifactClosure* _subsystem_callback = NULL; 61 static bool _class_unload = false; 62 static bool _flushpoint = false; 63 64 // incremented on each rotation 65 static u8 checkpoint_id = 1; 66 67 // creates a unique id by combining a checkpoint relative symbol id (2^24) 68 // with the current checkpoint id (2^40) 69 #define CREATE_SYMBOL_ID(sym_id) (((u8)((checkpoint_id << 24) | sym_id))) 70 71 static traceid create_symbol_id(traceid artifact_id) { 72 return artifact_id != 0 ? CREATE_SYMBOL_ID(artifact_id) : 0; 73 } 74 75 static bool current_epoch() { 76 return _class_unload || _flushpoint; 77 } 78 79 static bool previous_epoch() { 80 return !current_epoch(); 81 } 82 83 static bool is_complete() { 84 return !_artifacts->has_klass_entries() && current_epoch(); 85 } 86 87 static traceid mark_symbol(KlassPtr klass, bool leakp) { 88 return klass != NULL ? create_symbol_id(_artifacts->mark(klass, leakp)) : 0; 89 } 90 91 static traceid mark_symbol(Symbol* symbol, bool leakp) { 92 return symbol != NULL ? create_symbol_id(_artifacts->mark(symbol, leakp)) : 0; 93 } 94 95 static traceid get_bootstrap_name(bool leakp) { 96 return create_symbol_id(_artifacts->bootstrap_name(leakp)); 97 } 98 99 template <typename T> 100 static traceid artifact_id(const T* ptr) { 101 assert(ptr != NULL, "invariant"); 102 return TRACE_ID(ptr); 103 } 104 105 static traceid package_id(KlassPtr klass, bool leakp) { 106 assert(klass != NULL, "invariant"); 107 PkgPtr pkg_entry = klass->package(); 108 if (pkg_entry == NULL) { 109 return 0; 110 } 111 if (leakp) { 112 SET_LEAKP(pkg_entry); 113 } 114 // package implicitly tagged already 115 return artifact_id(pkg_entry); 116 } 117 118 static traceid module_id(PkgPtr pkg, bool leakp) { 119 assert(pkg != NULL, "invariant"); 120 ModPtr module_entry = pkg->module(); 121 if (module_entry == NULL) { 122 return 0; 123 } 124 if (leakp) { 125 SET_LEAKP(module_entry); 126 } else { 127 SET_TRANSIENT(module_entry); 128 } 129 return artifact_id(module_entry); 130 } 131 132 static traceid method_id(KlassPtr klass, MethodPtr method) { 133 assert(klass != NULL, "invariant"); 134 assert(method != NULL, "invariant"); 135 return METHOD_ID(klass, method); 136 } 137 138 static traceid cld_id(CldPtr cld, bool leakp) { 139 assert(cld != NULL, "invariant"); 140 assert(!cld->is_unsafe_anonymous(), "invariant"); 141 if (leakp) { 142 SET_LEAKP(cld); 143 } else { 144 SET_TRANSIENT(cld); 145 } 146 return artifact_id(cld); 147 } 148 149 template <typename T> 150 static s4 get_flags(const T* ptr) { 151 assert(ptr != NULL, "invariant"); 152 return ptr->access_flags().get_flags(); 153 } 154 155 static bool is_unsafe_anonymous(const Klass* klass) { 156 assert(klass != NULL, "invariant"); 157 assert(!klass->is_objArray_klass(), "invariant"); 158 return klass->is_instance_klass() && InstanceKlass::cast(klass)->is_unsafe_anonymous(); 159 } 160 161 static ClassLoaderData* get_cld(const Klass* klass) { 162 assert(klass != NULL, "invariant"); 163 if (klass->is_objArray_klass()) { 164 klass = ObjArrayKlass::cast(klass)->bottom_klass(); 165 } 166 return is_unsafe_anonymous(klass) ? 167 InstanceKlass::cast(klass)->unsafe_anonymous_host()->class_loader_data() : klass->class_loader_data(); 168 } 169 170 template <typename T> 171 static void set_serialized(const T* ptr) { 172 assert(ptr != NULL, "invariant"); 173 SET_SERIALIZED(ptr); 174 assert(IS_SERIALIZED(ptr), "invariant"); 175 CLEAR_THIS_EPOCH_CLEARED_BIT(ptr); 176 } 177 178 /* 179 * In C++03, functions used as template parameters must have external linkage; 180 * this restriction was removed in C++11. Change back to "static" and 181 * rename functions when C++11 becomes available. 182 * 183 * The weird naming is an effort to decrease the risk of name clashes. 184 */ 185 186 static int write_klass(JfrCheckpointWriter* writer, KlassPtr klass, bool leakp) { 187 assert(writer != NULL, "invariant"); 188 assert(_artifacts != NULL, "invariant"); 189 assert(klass != NULL, "invariant"); 190 writer->write(artifact_id(klass)); 191 writer->write(cld_id(get_cld(klass), leakp)); 192 writer->write(mark_symbol(klass, leakp)); 193 writer->write(package_id(klass, leakp)); 194 writer->write(get_flags(klass)); 195 return 1; 196 } 197 198 int write__klass(JfrCheckpointWriter* writer, const void* k) { 199 assert(k != NULL, "invariant"); 200 KlassPtr klass = (KlassPtr)k; 201 set_serialized(klass); 202 return write_klass(writer, klass, false); 203 } 204 205 int write__klass__leakp(JfrCheckpointWriter* writer, const void* k) { 206 assert(k != NULL, "invariant"); 207 KlassPtr klass = (KlassPtr)k; 208 return write_klass(writer, klass, true); 209 } 210 211 static bool is_implied(const Klass* klass) { 212 assert(klass != NULL, "invariant"); 213 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()) || klass == SystemDictionary::Object_klass(); 214 } 215 216 static void do_implied(Klass* klass) { 217 assert(klass != NULL, "invariant"); 218 if (is_implied(klass)) { 219 if (_leakp_writer != NULL) { 220 SET_LEAKP(klass); 221 } 222 _subsystem_callback->do_artifact(klass); 223 } 224 } 225 226 static void do_unloaded_klass(Klass* klass) { 227 assert(klass != NULL, "invariant"); 228 assert(_subsystem_callback != NULL, "invariant"); 229 if (IS_JDK_JFR_EVENT_SUBKLASS(klass)) { 230 JfrEventClasses::increment_unloaded_event_class(); 231 } 232 if (USED_THIS_EPOCH(klass)) { 233 ObjectSampleCheckpoint::on_klass_unload(klass); 234 _subsystem_callback->do_artifact(klass); 235 return; 236 } 237 do_implied(klass); 238 } 239 240 static void do_klass(Klass* klass) { 241 assert(klass != NULL, "invariant"); 242 assert(_subsystem_callback != NULL, "invariant"); 243 if (_flushpoint) { 244 if (USED_THIS_EPOCH(klass)) { 245 _subsystem_callback->do_artifact(klass); 246 return; 247 } 248 } else { 249 if (USED_PREV_EPOCH(klass)) { 250 _subsystem_callback->do_artifact(klass); 251 return; 252 } 253 } 254 do_implied(klass); 255 } 256 257 static void do_klasses() { 258 if (_class_unload) { 259 ClassLoaderDataGraph::classes_unloading_do(&do_unloaded_klass); 260 return; 261 } 262 ClassLoaderDataGraph::classes_do(&do_klass); 263 } 264 265 typedef SerializePredicate<KlassPtr> KlassPredicate; 266 typedef JfrPredicatedTypeWriterImplHost<KlassPtr, KlassPredicate, write__klass> KlassWriterImpl; 267 typedef JfrTypeWriterHost<KlassWriterImpl, TYPE_CLASS> KlassWriter; 268 typedef CompositeFunctor<KlassPtr, KlassWriter, KlassArtifactRegistrator> KlassWriterRegistration; 269 typedef JfrArtifactCallbackHost<KlassPtr, KlassWriterRegistration> KlassCallback; 270 271 template <> 272 class LeakPredicate<const Klass*> { 273 public: 274 LeakPredicate(bool class_unload) {} 275 bool operator()(const Klass* klass) { 276 assert(klass != NULL, "invariant"); 277 return IS_LEAKP(klass) || is_implied(klass); 278 } 279 }; 280 281 typedef LeakPredicate<KlassPtr> LeakKlassPredicate; 282 typedef JfrPredicatedTypeWriterImplHost<KlassPtr, LeakKlassPredicate, write__klass__leakp> LeakKlassWriterImpl; 283 typedef JfrTypeWriterHost<LeakKlassWriterImpl, TYPE_CLASS> LeakKlassWriter; 284 285 typedef CompositeFunctor<KlassPtr, LeakKlassWriter, KlassWriter> CompositeKlassWriter; 286 typedef CompositeFunctor<KlassPtr, CompositeKlassWriter, KlassArtifactRegistrator> CompositeKlassWriterRegistration; 287 typedef JfrArtifactCallbackHost<KlassPtr, CompositeKlassWriterRegistration> CompositeKlassCallback; 288 289 static bool write_klasses() { 290 assert(!_artifacts->has_klass_entries(), "invariant"); 291 assert(_writer != NULL, "invariant"); 292 KlassArtifactRegistrator reg(_artifacts); 293 KlassWriter kw(_writer, _class_unload); 294 KlassWriterRegistration kwr(&kw, ®); 295 if (_leakp_writer == NULL) { 296 KlassCallback callback(&kwr); 297 _subsystem_callback = &callback; 298 do_klasses(); 299 } else { 300 LeakKlassWriter lkw(_leakp_writer, _class_unload); 301 CompositeKlassWriter ckw(&lkw, &kw); 302 CompositeKlassWriterRegistration ckwr(&ckw, ®); 303 CompositeKlassCallback callback(&ckwr); 304 _subsystem_callback = &callback; 305 do_klasses(); 306 } 307 if (is_complete()) { 308 return false; 309 } 310 _artifacts->tally(kw); 311 return true; 312 } 313 314 template <typename T> 315 static void do_previous_epoch_artifact(JfrArtifactClosure* callback, T* value) { 316 assert(callback != NULL, "invariant"); 317 assert(value != NULL, "invariant"); 318 if (USED_PREV_EPOCH(value)) { 319 callback->do_artifact(value); 320 assert(IS_NOT_SERIALIZED(value), "invariant"); 321 return; 322 } 323 if (IS_SERIALIZED(value)) { 324 CLEAR_SERIALIZED(value); 325 } 326 assert(IS_NOT_SERIALIZED(value), "invariant"); 327 } 328 329 typedef JfrArtifactCallbackHost<KlassPtr, KlassArtifactRegistrator> RegistrationCallback; 330 331 static void register_klass(Klass* klass) { 332 assert(klass != NULL, "invariant"); 333 assert(_subsystem_callback != NULL, "invariant"); 334 do_previous_epoch_artifact(_subsystem_callback, klass); 335 } 336 337 static void do_register_klasses() { 338 ClassLoaderDataGraph::classes_do(®ister_klass); 339 } 340 341 static void register_klasses() { 342 assert(!_artifacts->has_klass_entries(), "invariant"); 343 KlassArtifactRegistrator reg(_artifacts); 344 RegistrationCallback callback(®); 345 _subsystem_callback = &callback; 346 do_register_klasses(); 347 } 348 349 static int write_package(JfrCheckpointWriter* writer, PkgPtr pkg, bool leakp) { 350 assert(writer != NULL, "invariant"); 351 assert(_artifacts != NULL, "invariant"); 352 assert(pkg != NULL, "invariant"); 353 writer->write(artifact_id(pkg)); 354 writer->write(mark_symbol(pkg->name(), leakp)); 355 writer->write(module_id(pkg, leakp)); 356 writer->write((bool)pkg->is_exported()); 357 return 1; 358 } 359 360 int write__package(JfrCheckpointWriter* writer, const void* p) { 361 assert(p != NULL, "invariant"); 362 PkgPtr pkg = (PkgPtr)p; 363 set_serialized(pkg); 364 return write_package(writer, pkg, false); 365 } 366 367 int write__package__leakp(JfrCheckpointWriter* writer, const void* p) { 368 assert(p != NULL, "invariant"); 369 PkgPtr pkg = (PkgPtr)p; 370 CLEAR_LEAKP(pkg); 371 return write_package(writer, pkg, true); 372 } 373 374 static void do_package(PackageEntry* entry) { 375 do_previous_epoch_artifact(_subsystem_callback, entry); 376 } 377 378 static void do_packages() { 379 ClassLoaderDataGraph::packages_do(&do_package); 380 } 381 382 class PackageFieldSelector { 383 public: 384 typedef PkgPtr TypePtr; 385 static TypePtr select(KlassPtr klass) { 386 assert(klass != NULL, "invariant"); 387 return klass->package(); 388 } 389 }; 390 391 typedef SerializePredicate<PkgPtr> PackagePredicate; 392 typedef JfrPredicatedTypeWriterImplHost<PkgPtr, PackagePredicate, write__package> PackageWriterImpl; 393 typedef JfrTypeWriterHost<PackageWriterImpl, TYPE_PACKAGE> PackageWriter; 394 typedef CompositeFunctor<PkgPtr, PackageWriter, ClearArtifact<PkgPtr> > PackageWriterWithClear; 395 typedef KlassToFieldEnvelope<PackageFieldSelector, PackageWriter> KlassPackageWriter; 396 typedef JfrArtifactCallbackHost<PkgPtr, PackageWriterWithClear> PackageCallback; 397 398 typedef LeakPredicate<PkgPtr> LeakPackagePredicate; 399 typedef JfrPredicatedTypeWriterImplHost<PkgPtr, LeakPackagePredicate, write__package__leakp> LeakPackageWriterImpl; 400 typedef JfrTypeWriterHost<LeakPackageWriterImpl, TYPE_PACKAGE> LeakPackageWriter; 401 402 typedef CompositeFunctor<PkgPtr, LeakPackageWriter, PackageWriter> CompositePackageWriter; 403 typedef KlassToFieldEnvelope<PackageFieldSelector, CompositePackageWriter> KlassCompositePackageWriter; 404 typedef KlassToFieldEnvelope<PackageFieldSelector, PackageWriterWithClear> KlassPackageWriterWithClear; 405 typedef CompositeFunctor<PkgPtr, CompositePackageWriter, ClearArtifact<PkgPtr> > CompositePackageWriterWithClear; 406 typedef JfrArtifactCallbackHost<PkgPtr, CompositePackageWriterWithClear> CompositePackageCallback; 407 408 static void write_packages() { 409 assert(_writer != NULL, "invariant"); 410 PackageWriter pw(_writer, _class_unload); 411 KlassPackageWriter kpw(&pw); 412 if (current_epoch()) { 413 _artifacts->iterate_klasses(kpw); 414 _artifacts->tally(pw); 415 return; 416 } 417 assert(previous_epoch(), "invariant"); 418 if (_leakp_writer == NULL) { 419 _artifacts->iterate_klasses(kpw); 420 ClearArtifact<PkgPtr> clear; 421 PackageWriterWithClear pwwc(&pw, &clear); 422 PackageCallback callback(&pwwc); 423 _subsystem_callback = &callback; 424 do_packages(); 425 } else { 426 LeakPackageWriter lpw(_leakp_writer, _class_unload); 427 CompositePackageWriter cpw(&lpw, &pw); 428 KlassCompositePackageWriter kcpw(&cpw); 429 _artifacts->iterate_klasses(kcpw); 430 ClearArtifact<PkgPtr> clear; 431 CompositePackageWriterWithClear cpwwc(&cpw, &clear); 432 CompositePackageCallback callback(&cpwwc); 433 _subsystem_callback = &callback; 434 do_packages(); 435 } 436 _artifacts->tally(pw); 437 } 438 439 typedef JfrArtifactCallbackHost<PkgPtr, ClearArtifact<PkgPtr> > ClearPackageCallback; 440 441 static void clear_packages() { 442 ClearArtifact<PkgPtr> clear; 443 ClearPackageCallback callback(&clear); 444 _subsystem_callback = &callback; 445 do_packages(); 446 } 447 448 static int write_module(JfrCheckpointWriter* writer, ModPtr mod, bool leakp) { 449 assert(mod != NULL, "invariant"); 450 assert(_artifacts != NULL, "invariant"); 451 writer->write(artifact_id(mod)); 452 writer->write(mark_symbol(mod->name(), leakp)); 453 writer->write(mark_symbol(mod->version(), leakp)); 454 writer->write(mark_symbol(mod->location(), leakp)); 455 writer->write(cld_id(mod->loader_data(), leakp)); 456 return 1; 457 } 458 459 int write__module(JfrCheckpointWriter* writer, const void* m) { 460 assert(m != NULL, "invariant"); 461 ModPtr mod = (ModPtr)m; 462 set_serialized(mod); 463 return write_module(writer, mod, false); 464 } 465 466 int write__module__leakp(JfrCheckpointWriter* writer, const void* m) { 467 assert(m != NULL, "invariant"); 468 ModPtr mod = (ModPtr)m; 469 CLEAR_LEAKP(mod); 470 return write_module(writer, mod, true); 471 } 472 473 static void do_module(ModuleEntry* entry) { 474 do_previous_epoch_artifact(_subsystem_callback, entry); 475 } 476 477 static void do_modules() { 478 ClassLoaderDataGraph::modules_do(&do_module); 479 } 480 481 class ModuleFieldSelector { 482 public: 483 typedef ModPtr TypePtr; 484 static TypePtr select(KlassPtr klass) { 485 assert(klass != NULL, "invariant"); 486 PkgPtr pkg = klass->package(); 487 return pkg != NULL ? pkg->module() : NULL; 488 } 489 }; 490 491 typedef SerializePredicate<ModPtr> ModulePredicate; 492 typedef JfrPredicatedTypeWriterImplHost<ModPtr, ModulePredicate, write__module> ModuleWriterImpl; 493 typedef JfrTypeWriterHost<ModuleWriterImpl, TYPE_MODULE> ModuleWriter; 494 typedef CompositeFunctor<ModPtr, ModuleWriter, ClearArtifact<ModPtr> > ModuleWriterWithClear; 495 typedef JfrArtifactCallbackHost<ModPtr, ModuleWriterWithClear> ModuleCallback; 496 typedef KlassToFieldEnvelope<ModuleFieldSelector, ModuleWriter> KlassModuleWriter; 497 498 typedef LeakPredicate<ModPtr> LeakModulePredicate; 499 typedef JfrPredicatedTypeWriterImplHost<ModPtr, LeakModulePredicate, write__module__leakp> LeakModuleWriterImpl; 500 typedef JfrTypeWriterHost<LeakModuleWriterImpl, TYPE_MODULE> LeakModuleWriter; 501 502 typedef CompositeFunctor<ModPtr, LeakModuleWriter, ModuleWriter> CompositeModuleWriter; 503 typedef KlassToFieldEnvelope<ModuleFieldSelector, CompositeModuleWriter> KlassCompositeModuleWriter; 504 typedef CompositeFunctor<ModPtr, CompositeModuleWriter, ClearArtifact<ModPtr> > CompositeModuleWriterWithClear; 505 typedef JfrArtifactCallbackHost<ModPtr, CompositeModuleWriterWithClear> CompositeModuleCallback; 506 507 static void write_modules() { 508 assert(_writer != NULL, "invariant"); 509 ModuleWriter mw(_writer, _class_unload); 510 KlassModuleWriter kmw(&mw); 511 if (current_epoch()) { 512 _artifacts->iterate_klasses(kmw); 513 _artifacts->tally(mw); 514 return; 515 } 516 assert(previous_epoch(), "invariant"); 517 if (_leakp_writer == NULL) { 518 _artifacts->iterate_klasses(kmw); 519 ClearArtifact<ModPtr> clear; 520 ModuleWriterWithClear mwwc(&mw, &clear); 521 ModuleCallback callback(&mwwc); 522 _subsystem_callback = &callback; 523 do_modules(); 524 } else { 525 LeakModuleWriter lmw(_leakp_writer, _class_unload); 526 CompositeModuleWriter cmw(&lmw, &mw); 527 KlassCompositeModuleWriter kcpw(&cmw); 528 _artifacts->iterate_klasses(kcpw); 529 ClearArtifact<ModPtr> clear; 530 CompositeModuleWriterWithClear cmwwc(&cmw, &clear); 531 CompositeModuleCallback callback(&cmwwc); 532 _subsystem_callback = &callback; 533 do_modules(); 534 } 535 _artifacts->tally(mw); 536 } 537 538 typedef JfrArtifactCallbackHost<ModPtr, ClearArtifact<ModPtr> > ClearModuleCallback; 539 540 static void clear_modules() { 541 ClearArtifact<ModPtr> clear; 542 ClearModuleCallback callback(&clear); 543 _subsystem_callback = &callback; 544 do_modules(); 545 } 546 547 static int write_classloader(JfrCheckpointWriter* writer, CldPtr cld, bool leakp) { 548 assert(cld != NULL, "invariant"); 549 assert(!cld->is_unsafe_anonymous(), "invariant"); 550 // class loader type 551 const Klass* class_loader_klass = cld->class_loader_klass(); 552 if (class_loader_klass == NULL) { 553 // (primordial) boot class loader 554 writer->write(artifact_id(cld)); // class loader instance id 555 writer->write((traceid)0); // class loader type id (absence of) 556 writer->write(get_bootstrap_name(leakp)); // maps to synthetic name -> "bootstrap" 557 } else { 558 writer->write(artifact_id(cld)); // class loader instance id 559 writer->write(artifact_id(class_loader_klass)); // class loader type id 560 writer->write(mark_symbol(cld->name(), leakp)); // class loader instance name 561 } 562 return 1; 563 } 564 565 int write__classloader(JfrCheckpointWriter* writer, const void* c) { 566 assert(c != NULL, "invariant"); 567 CldPtr cld = (CldPtr)c; 568 set_serialized(cld); 569 return write_classloader(writer, cld, false); 570 } 571 572 int write__classloader__leakp(JfrCheckpointWriter* writer, const void* c) { 573 assert(c != NULL, "invariant"); 574 CldPtr cld = (CldPtr)c; 575 CLEAR_LEAKP(cld); 576 return write_classloader(writer, cld, true); 577 } 578 579 static void do_class_loader_data(ClassLoaderData* cld) { 580 do_previous_epoch_artifact(_subsystem_callback, cld); 581 } 582 583 class KlassCldFieldSelector { 584 public: 585 typedef CldPtr TypePtr; 586 static TypePtr select(KlassPtr klass) { 587 assert(klass != NULL, "invariant"); 588 return get_cld(klass); 589 } 590 }; 591 592 class ModuleCldFieldSelector { 593 public: 594 typedef CldPtr TypePtr; 595 static TypePtr select(KlassPtr klass) { 596 assert(klass != NULL, "invariant"); 597 ModPtr mod = ModuleFieldSelector::select(klass); 598 return mod != NULL ? mod->loader_data() : NULL; 599 } 600 }; 601 602 class CLDCallback : public CLDClosure { 603 public: 604 CLDCallback() {} 605 void do_cld(ClassLoaderData* cld) { 606 assert(cld != NULL, "invariant"); 607 if (cld->is_unsafe_anonymous()) { 608 return; 609 } 610 do_class_loader_data(cld); 611 } 612 }; 613 614 static void do_class_loaders() { 615 CLDCallback cld_cb; 616 ClassLoaderDataGraph::loaded_cld_do(&cld_cb); 617 } 618 619 typedef SerializePredicate<CldPtr> CldPredicate; 620 typedef JfrPredicatedTypeWriterImplHost<CldPtr, CldPredicate, write__classloader> CldWriterImpl; 621 typedef JfrTypeWriterHost<CldWriterImpl, TYPE_CLASSLOADER> CldWriter; 622 typedef CompositeFunctor<CldPtr, CldWriter, ClearArtifact<CldPtr> > CldWriterWithClear; 623 typedef JfrArtifactCallbackHost<CldPtr, CldWriterWithClear> CldCallback; 624 typedef KlassToFieldEnvelope<KlassCldFieldSelector, CldWriter> KlassCldWriter; 625 typedef KlassToFieldEnvelope<ModuleCldFieldSelector, CldWriter> ModuleCldWriter; 626 typedef CompositeFunctor<KlassPtr, KlassCldWriter, ModuleCldWriter> KlassAndModuleCldWriter; 627 628 typedef LeakPredicate<CldPtr> LeakCldPredicate; 629 typedef JfrPredicatedTypeWriterImplHost<CldPtr, LeakCldPredicate, write__classloader__leakp> LeakCldWriterImpl; 630 typedef JfrTypeWriterHost<LeakCldWriterImpl, TYPE_CLASSLOADER> LeakCldWriter; 631 632 typedef CompositeFunctor<CldPtr, LeakCldWriter, CldWriter> CompositeCldWriter; 633 typedef KlassToFieldEnvelope<KlassCldFieldSelector, CompositeCldWriter> KlassCompositeCldWriter; 634 typedef KlassToFieldEnvelope<ModuleCldFieldSelector, CompositeCldWriter> ModuleCompositeCldWriter; 635 typedef CompositeFunctor<KlassPtr, KlassCompositeCldWriter, ModuleCompositeCldWriter> KlassAndModuleCompositeCldWriter; 636 typedef CompositeFunctor<CldPtr, CompositeCldWriter, ClearArtifact<CldPtr> > CompositeCldWriterWithClear; 637 typedef JfrArtifactCallbackHost<CldPtr, CompositeCldWriterWithClear> CompositeCldCallback; 638 639 static void write_classloaders() { 640 assert(_writer != NULL, "invariant"); 641 CldWriter cldw(_writer, _class_unload); 642 KlassCldWriter kcw(&cldw); 643 ModuleCldWriter mcw(&cldw); 644 KlassAndModuleCldWriter kmcw(&kcw, &mcw); 645 if (current_epoch()) { 646 _artifacts->iterate_klasses(kmcw); 647 _artifacts->tally(cldw); 648 return; 649 } 650 assert(previous_epoch(), "invariant"); 651 if (_leakp_writer == NULL) { 652 _artifacts->iterate_klasses(kmcw); 653 ClearArtifact<CldPtr> clear; 654 CldWriterWithClear cldwwc(&cldw, &clear); 655 CldCallback callback(&cldwwc); 656 _subsystem_callback = &callback; 657 do_class_loaders(); 658 } else { 659 LeakCldWriter lcldw(_leakp_writer, _class_unload); 660 CompositeCldWriter ccldw(&lcldw, &cldw); 661 KlassCompositeCldWriter kccldw(&ccldw); 662 ModuleCompositeCldWriter mccldw(&ccldw); 663 KlassAndModuleCompositeCldWriter kmccldw(&kccldw, &mccldw); 664 _artifacts->iterate_klasses(kmccldw); 665 ClearArtifact<CldPtr> clear; 666 CompositeCldWriterWithClear ccldwwc(&ccldw, &clear); 667 CompositeCldCallback callback(&ccldwwc); 668 _subsystem_callback = &callback; 669 do_class_loaders(); 670 } 671 _artifacts->tally(cldw); 672 } 673 674 typedef JfrArtifactCallbackHost<CldPtr, ClearArtifact<CldPtr> > ClearCLDCallback; 675 676 static void clear_classloaders() { 677 ClearArtifact<CldPtr> clear; 678 ClearCLDCallback callback(&clear); 679 _subsystem_callback = &callback; 680 do_class_loaders(); 681 } 682 683 static u1 get_visibility(MethodPtr method) { 684 assert(method != NULL, "invariant"); 685 return const_cast<Method*>(method)->is_hidden() ? (u1)1 : (u1)0; 686 } 687 688 template <> 689 void set_serialized<Method>(MethodPtr method) { 690 assert(method != NULL, "invariant"); 691 SET_METHOD_SERIALIZED(method); 692 assert(IS_METHOD_SERIALIZED(method), "invariant"); 693 CLEAR_THIS_EPOCH_METHOD_CLEARED_BIT(method); 694 } 695 696 static int write_method(JfrCheckpointWriter* writer, MethodPtr method, bool leakp) { 697 assert(writer != NULL, "invariant"); 698 assert(method != NULL, "invariant"); 699 assert(_artifacts != NULL, "invariant"); 700 KlassPtr klass = method->method_holder(); 701 assert(klass != NULL, "invariant"); 702 writer->write(method_id(klass, method)); 703 writer->write(artifact_id(klass)); 704 writer->write(mark_symbol(method->name(), leakp)); 705 writer->write(mark_symbol(method->signature(), leakp)); 706 writer->write((u2)get_flags(method)); 707 writer->write(get_visibility(method)); 708 return 1; 709 } 710 711 int write__method(JfrCheckpointWriter* writer, const void* m) { 712 assert(m != NULL, "invariant"); 713 MethodPtr method = (MethodPtr)m; 714 set_serialized(method); 715 return write_method(writer, method, false); 716 } 717 718 int write__method__leakp(JfrCheckpointWriter* writer, const void* m) { 719 assert(m != NULL, "invariant"); 720 MethodPtr method = (MethodPtr)m; 721 return write_method(writer, method, true); 722 } 723 724 class BitMapFilter { 725 ResourceBitMap _bitmap; 726 public: 727 explicit BitMapFilter(int length = 0) : _bitmap((size_t)length) {} 728 bool operator()(size_t idx) { 729 if (_bitmap.size() == 0) { 730 return true; 731 } 732 if (_bitmap.at(idx)) { 733 return false; 734 } 735 _bitmap.set_bit(idx); 736 return true; 737 } 738 }; 739 740 class AlwaysTrue { 741 public: 742 explicit AlwaysTrue(int length = 0) {} 743 bool operator()(size_t idx) { 744 return true; 745 } 746 }; 747 748 template <typename MethodCallback, typename KlassCallback, class Filter, bool leakp> 749 class MethodIteratorHost { 750 private: 751 MethodCallback _method_cb; 752 KlassCallback _klass_cb; 753 MethodUsedPredicate<leakp> _method_used_predicate; 754 MethodFlagPredicate<leakp> _method_flag_predicate; 755 public: 756 MethodIteratorHost(JfrCheckpointWriter* writer, 757 bool current_epoch = false, 758 bool class_unload = false, 759 bool skip_header = false) : 760 _method_cb(writer, class_unload, skip_header), 761 _klass_cb(writer, class_unload, skip_header), 762 _method_used_predicate(current_epoch), 763 _method_flag_predicate(current_epoch) {} 764 765 bool operator()(KlassPtr klass) { 766 if (_method_used_predicate(klass)) { 767 const InstanceKlass* ik = InstanceKlass::cast(klass); 768 const int len = ik->methods()->length(); 769 Filter filter(ik->previous_versions() != NULL ? len : 0); 770 while (ik != NULL) { 771 for (int i = 0; i < len; ++i) { 772 MethodPtr method = ik->methods()->at(i); 773 if (_method_flag_predicate(method) && filter(i)) { 774 _method_cb(method); 775 } 776 } 777 // There can be multiple versions of the same method running 778 // due to redefinition. Need to inspect the complete set of methods. 779 ik = ik->previous_versions(); 780 } 781 } 782 return _klass_cb(klass); 783 } 784 785 int count() const { return _method_cb.count(); } 786 void add(int count) { _method_cb.add(count); } 787 }; 788 789 template <typename T, template <typename> class Impl> 790 class Wrapper { 791 Impl<T> _t; 792 public: 793 Wrapper(JfrCheckpointWriter*, bool, bool) : _t() {} 794 bool operator()(T const& value) { 795 return _t(value); 796 } 797 }; 798 799 template <typename T> 800 class EmptyStub { 801 public: 802 bool operator()(T const& value) { return true; } 803 }; 804 805 typedef SerializePredicate<MethodPtr> MethodPredicate; 806 typedef JfrPredicatedTypeWriterImplHost<MethodPtr, MethodPredicate, write__method> MethodWriterImplTarget; 807 typedef Wrapper<KlassPtr, EmptyStub> KlassCallbackStub; 808 typedef JfrTypeWriterHost<MethodWriterImplTarget, TYPE_METHOD> MethodWriterImpl; 809 typedef MethodIteratorHost<MethodWriterImpl, KlassCallbackStub, BitMapFilter, false> MethodWriter; 810 811 typedef LeakPredicate<MethodPtr> LeakMethodPredicate; 812 typedef JfrPredicatedTypeWriterImplHost<MethodPtr, LeakMethodPredicate, write__method__leakp> LeakMethodWriterImplTarget; 813 typedef JfrTypeWriterHost<LeakMethodWriterImplTarget, TYPE_METHOD> LeakMethodWriterImpl; 814 typedef MethodIteratorHost<LeakMethodWriterImpl, KlassCallbackStub, BitMapFilter, true> LeakMethodWriter; 815 typedef MethodIteratorHost<LeakMethodWriterImpl, KlassCallbackStub, BitMapFilter, true> LeakMethodWriter; 816 typedef CompositeFunctor<KlassPtr, LeakMethodWriter, MethodWriter> CompositeMethodWriter; 817 818 static void write_methods() { 819 assert(_writer != NULL, "invariant"); 820 MethodWriter mw(_writer, current_epoch(), _class_unload); 821 if (_leakp_writer == NULL) { 822 _artifacts->iterate_klasses(mw); 823 } else { 824 LeakMethodWriter lpmw(_leakp_writer, current_epoch(), _class_unload); 825 CompositeMethodWriter cmw(&lpmw, &mw); 826 _artifacts->iterate_klasses(cmw); 827 } 828 _artifacts->tally(mw); 829 } 830 831 template <> 832 void set_serialized<JfrSymbolId::SymbolEntry>(SymbolEntryPtr ptr) { 833 assert(ptr != NULL, "invariant"); 834 ptr->set_serialized(); 835 assert(ptr->is_serialized(), "invariant"); 836 } 837 838 template <> 839 void set_serialized<JfrSymbolId::CStringEntry>(CStringEntryPtr ptr) { 840 assert(ptr != NULL, "invariant"); 841 ptr->set_serialized(); 842 assert(ptr->is_serialized(), "invariant"); 843 } 844 845 static int write_symbol(JfrCheckpointWriter* writer, SymbolEntryPtr entry, bool leakp) { 846 assert(writer != NULL, "invariant"); 847 assert(entry != NULL, "invariant"); 848 ResourceMark rm; 849 writer->write(create_symbol_id(entry->id())); 850 writer->write(entry->value()->as_C_string()); 851 return 1; 852 } 853 854 int write__symbol(JfrCheckpointWriter* writer, const void* e) { 855 assert(e != NULL, "invariant"); 856 SymbolEntryPtr entry = (SymbolEntryPtr)e; 857 set_serialized(entry); 858 return write_symbol(writer, entry, false); 859 } 860 861 int write__symbol__leakp(JfrCheckpointWriter* writer, const void* e) { 862 assert(e != NULL, "invariant"); 863 SymbolEntryPtr entry = (SymbolEntryPtr)e; 864 return write_symbol(writer, entry, true); 865 } 866 867 static int write_cstring(JfrCheckpointWriter* writer, CStringEntryPtr entry, bool leakp) { 868 assert(writer != NULL, "invariant"); 869 assert(entry != NULL, "invariant"); 870 writer->write(create_symbol_id(entry->id())); 871 writer->write(entry->value()); 872 return 1; 873 } 874 875 int write__cstring(JfrCheckpointWriter* writer, const void* e) { 876 assert(e != NULL, "invariant"); 877 CStringEntryPtr entry = (CStringEntryPtr)e; 878 set_serialized(entry); 879 return write_cstring(writer, entry, false); 880 } 881 882 int write__cstring__leakp(JfrCheckpointWriter* writer, const void* e) { 883 assert(e != NULL, "invariant"); 884 CStringEntryPtr entry = (CStringEntryPtr)e; 885 return write_cstring(writer, entry, true); 886 } 887 888 typedef SymbolPredicate<SymbolEntryPtr, false> SymPredicate; 889 typedef JfrPredicatedTypeWriterImplHost<SymbolEntryPtr, SymPredicate, write__symbol> SymbolEntryWriterImpl; 890 typedef JfrTypeWriterHost<SymbolEntryWriterImpl, TYPE_SYMBOL> SymbolEntryWriter; 891 typedef SymbolPredicate<CStringEntryPtr, false> CStringPredicate; 892 typedef JfrPredicatedTypeWriterImplHost<CStringEntryPtr, CStringPredicate, write__cstring> CStringEntryWriterImpl; 893 typedef JfrTypeWriterHost<CStringEntryWriterImpl, TYPE_SYMBOL> CStringEntryWriter; 894 895 typedef SymbolPredicate<SymbolEntryPtr, true> LeakSymPredicate; 896 typedef JfrPredicatedTypeWriterImplHost<SymbolEntryPtr, LeakSymPredicate, write__symbol__leakp> LeakSymbolEntryWriterImpl; 897 typedef JfrTypeWriterHost<LeakSymbolEntryWriterImpl, TYPE_SYMBOL> LeakSymbolEntryWriter; 898 typedef CompositeFunctor<SymbolEntryPtr, LeakSymbolEntryWriter, SymbolEntryWriter> CompositeSymbolWriter; 899 typedef SymbolPredicate<CStringEntryPtr, true> LeakCStringPredicate; 900 typedef JfrPredicatedTypeWriterImplHost<CStringEntryPtr, LeakCStringPredicate, write__cstring__leakp> LeakCStringEntryWriterImpl; 901 typedef JfrTypeWriterHost<LeakCStringEntryWriterImpl, TYPE_SYMBOL> LeakCStringEntryWriter; 902 typedef CompositeFunctor<CStringEntryPtr, LeakCStringEntryWriter, CStringEntryWriter> CompositeCStringWriter; 903 904 static void write_symbols_with_leakp() { 905 assert(_leakp_writer != NULL, "invariant"); 906 SymbolEntryWriter sw(_writer, _class_unload); 907 LeakSymbolEntryWriter lsw(_leakp_writer, _class_unload); 908 CompositeSymbolWriter csw(&lsw, &sw); 909 _artifacts->iterate_symbols(csw); 910 CStringEntryWriter ccsw(_writer, _class_unload, true); // skip header 911 LeakCStringEntryWriter lccsw(_leakp_writer, _class_unload, true); // skip header 912 CompositeCStringWriter cccsw(&lccsw, &ccsw); 913 _artifacts->iterate_cstrings(cccsw); 914 sw.add(ccsw.count()); 915 lsw.add(lccsw.count()); 916 _artifacts->tally(sw); 917 } 918 919 static void write_symbols() { 920 assert(_writer != NULL, "invariant"); 921 if (_leakp_writer != NULL) { 922 write_symbols_with_leakp(); 923 return; 924 } 925 SymbolEntryWriter sw(_writer, _class_unload); 926 _artifacts->iterate_symbols(sw); 927 CStringEntryWriter csw(_writer, _class_unload, true); // skip header 928 _artifacts->iterate_cstrings(csw); 929 sw.add(csw.count()); 930 _artifacts->tally(sw); 931 } 932 933 typedef Wrapper<KlassPtr, ClearArtifact> ClearKlassBits; 934 typedef Wrapper<MethodPtr, ClearArtifact> ClearMethodFlag; 935 typedef MethodIteratorHost<ClearMethodFlag, ClearKlassBits, AlwaysTrue, false> ClearKlassAndMethods; 936 937 static bool clear_artifacts = false; 938 939 static void clear_klasses_and_methods() { 940 ClearKlassAndMethods clear(_writer); 941 _artifacts->iterate_klasses(clear); 942 } 943 944 static size_t teardown() { 945 assert(_artifacts != NULL, "invariant"); 946 const size_t total_count = _artifacts->total_count(); 947 if (previous_epoch()) { 948 clear_klasses_and_methods(); 949 clear_artifacts = true; 950 ++checkpoint_id; 951 } 952 return total_count; 953 } 954 955 static void setup(JfrCheckpointWriter* writer, JfrCheckpointWriter* leakp_writer, bool class_unload, bool flushpoint) { 956 _writer = writer; 957 _leakp_writer = leakp_writer; 958 _class_unload = class_unload; 959 _flushpoint = flushpoint; 960 if (_artifacts == NULL) { 961 _artifacts = new JfrArtifactSet(class_unload); 962 } else { 963 _artifacts->initialize(class_unload, clear_artifacts); 964 } 965 clear_artifacts = false; 966 assert(_artifacts != NULL, "invariant"); 967 assert(!_artifacts->has_klass_entries(), "invariant"); 968 } 969 970 /** 971 * Write all "tagged" (in-use) constant artifacts and their dependencies. 972 */ 973 size_t JfrTypeSet::serialize(JfrCheckpointWriter* writer, JfrCheckpointWriter* leakp_writer, bool class_unload, bool flushpoint) { 974 assert(writer != NULL, "invariant"); 975 ResourceMark rm; 976 setup(writer, leakp_writer, class_unload, flushpoint); 977 // write order is important because an individual write step 978 // might tag an artifact to be written in a subsequent step 979 if (!write_klasses()) { 980 return 0; 981 } 982 write_packages(); 983 write_modules(); 984 write_classloaders(); 985 write_methods(); 986 write_symbols(); 987 return teardown(); 988 } 989 990 /** 991 * Clear all tags from the previous epoch. 992 */ 993 void JfrTypeSet::clear() { 994 clear_artifacts = true; 995 setup(NULL, NULL, false, false); 996 register_klasses(); 997 clear_packages(); 998 clear_modules(); 999 clear_classloaders(); 1000 clear_klasses_and_methods(); 1001 }