1 /* 2 * Copyright (c) 2003, 2021, 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 "classfile/moduleEntry.hpp" 28 #include "classfile/vmClasses.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/nmethod.hpp" 31 #include "code/pcDesc.hpp" 32 #include "code/scopeDesc.hpp" 33 #include "gc/shared/oopStorageSet.hpp" 34 #include "interpreter/interpreter.hpp" 35 #include "jvmtifiles/jvmtiEnv.hpp" 36 #include "logging/log.hpp" 37 #include "logging/logStream.hpp" 38 #include "memory/allocation.inline.hpp" 39 #include "memory/resourceArea.hpp" 40 #include "memory/universe.hpp" 41 #include "oops/klass.inline.hpp" 42 #include "oops/objArrayKlass.hpp" 43 #include "oops/objArrayOop.hpp" 44 #include "oops/oop.inline.hpp" 45 #include "oops/oopHandle.inline.hpp" 46 #include "prims/jvmtiCodeBlobEvents.hpp" 47 #include "prims/jvmtiEventController.hpp" 48 #include "prims/jvmtiEventController.inline.hpp" 49 #include "prims/jvmtiExport.hpp" 50 #include "prims/jvmtiImpl.hpp" 51 #include "prims/jvmtiManageCapabilities.hpp" 52 #include "prims/jvmtiRawMonitor.hpp" 53 #include "prims/jvmtiRedefineClasses.hpp" 54 #include "prims/jvmtiTagMap.hpp" 55 #include "prims/jvmtiThreadState.inline.hpp" 56 #include "runtime/arguments.hpp" 57 #include "runtime/fieldDescriptor.inline.hpp" 58 #include "runtime/handles.inline.hpp" 59 #include "runtime/interfaceSupport.inline.hpp" 60 #include "runtime/javaCalls.hpp" 61 #include "runtime/jniHandles.inline.hpp" 62 #include "runtime/objectMonitor.hpp" 63 #include "runtime/objectMonitor.inline.hpp" 64 #include "runtime/os.hpp" 65 #include "runtime/osThread.hpp" 66 #include "runtime/safepointVerifiers.hpp" 67 #include "runtime/serviceThread.hpp" 68 #include "runtime/thread.inline.hpp" 69 #include "runtime/threadSMR.hpp" 70 #include "runtime/vframe.inline.hpp" 71 #include "runtime/vm_version.hpp" 72 #include "utilities/macros.hpp" 73 74 #ifdef JVMTI_TRACE 75 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 76 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 77 #else 78 #define EVT_TRIG_TRACE(evt,out) 79 #define EVT_TRACE(evt,out) 80 #endif 81 82 /////////////////////////////////////////////////////////////// 83 // 84 // JvmtiEventTransition 85 // 86 // TO DO -- 87 // more handle purging 88 89 // Use this for JavaThreads and state is _thread_in_vm. 90 class JvmtiJavaThreadEventTransition : StackObj { 91 private: 92 ResourceMark _rm; 93 ThreadToNativeFromVM _transition; 94 HandleMark _hm; 95 96 public: 97 JvmtiJavaThreadEventTransition(JavaThread *thread) : 98 _rm(), 99 _transition(thread), 100 _hm(thread) {}; 101 }; 102 103 // For JavaThreads which are not in _thread_in_vm state 104 // and other system threads use this. 105 class JvmtiThreadEventTransition : StackObj { 106 private: 107 ResourceMark _rm; 108 HandleMark _hm; 109 JavaThreadState _saved_state; 110 JavaThread *_jthread; 111 112 public: 113 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm(thread) { 114 if (thread->is_Java_thread()) { 115 _jthread = JavaThread::cast(thread); 116 _saved_state = _jthread->thread_state(); 117 if (_saved_state == _thread_in_Java) { 118 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 119 } else { 120 ThreadStateTransition::transition_from_vm(_jthread, _thread_in_native); 121 } 122 } else { 123 _jthread = NULL; 124 } 125 } 126 127 ~JvmtiThreadEventTransition() { 128 if (_jthread != NULL) 129 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 130 } 131 }; 132 133 134 /////////////////////////////////////////////////////////////// 135 // 136 // JvmtiEventMark 137 // 138 139 class JvmtiEventMark : public StackObj { 140 private: 141 JavaThread *_thread; 142 JNIEnv* _jni_env; 143 JvmtiThreadState::ExceptionState _saved_exception_state; 144 145 public: 146 JvmtiEventMark(JavaThread *thread) : _thread(thread), 147 _jni_env(thread->jni_environment()), 148 _saved_exception_state(JvmtiThreadState::ES_CLEARED) { 149 JvmtiThreadState *state = thread->jvmti_thread_state(); 150 // we are before an event. 151 // Save current jvmti thread exception state. 152 if (state != NULL) { 153 _saved_exception_state = state->get_exception_state(); 154 } 155 156 thread->push_jni_handle_block(); 157 assert(thread == JavaThread::current(), "thread must be current!"); 158 thread->frame_anchor()->make_walkable(thread); 159 }; 160 161 ~JvmtiEventMark() { 162 _thread->pop_jni_handle_block(); 163 164 JvmtiThreadState* state = _thread->jvmti_thread_state(); 165 // we are continuing after an event. 166 if (state != NULL) { 167 // Restore the jvmti thread exception state. 168 state->restore_exception_state(_saved_exception_state); 169 } 170 } 171 172 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 173 174 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); } 175 176 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); } 177 178 JNIEnv* jni_env() { return _jni_env; } 179 }; 180 181 class JvmtiThreadEventMark : public JvmtiEventMark { 182 private: 183 jthread _jt; 184 185 public: 186 JvmtiThreadEventMark(JavaThread *thread) : 187 JvmtiEventMark(thread) { 188 _jt = (jthread)(to_jobject(thread->threadObj())); 189 }; 190 jthread jni_thread() { return _jt; } 191 }; 192 193 class JvmtiClassEventMark : public JvmtiThreadEventMark { 194 private: 195 jclass _jc; 196 197 public: 198 JvmtiClassEventMark(JavaThread *thread, Klass* klass) : 199 JvmtiThreadEventMark(thread) { 200 _jc = to_jclass(klass); 201 }; 202 jclass jni_class() { return _jc; } 203 }; 204 205 class JvmtiMethodEventMark : public JvmtiThreadEventMark { 206 private: 207 jmethodID _mid; 208 209 public: 210 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) : 211 JvmtiThreadEventMark(thread), 212 _mid(to_jmethodID(method)) {}; 213 jmethodID jni_methodID() { return _mid; } 214 }; 215 216 class JvmtiLocationEventMark : public JvmtiMethodEventMark { 217 private: 218 jlocation _loc; 219 220 public: 221 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) : 222 JvmtiMethodEventMark(thread, method), 223 _loc(location - method->code_base()) {}; 224 jlocation location() { return _loc; } 225 }; 226 227 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 228 private: 229 jobject _exc; 230 231 public: 232 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) : 233 JvmtiLocationEventMark(thread, method, location), 234 _exc(to_jobject(exception())) {}; 235 jobject exception() { return _exc; } 236 }; 237 238 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 239 private: 240 const char *_class_name; 241 jobject _jloader; 242 jobject _protection_domain; 243 jclass _class_being_redefined; 244 245 public: 246 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 247 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) { 248 _class_name = name != NULL? name->as_utf8() : NULL; 249 _jloader = (jobject)to_jobject(class_loader()); 250 _protection_domain = (jobject)to_jobject(prot_domain()); 251 if (class_being_redefined == NULL) { 252 _class_being_redefined = NULL; 253 } else { 254 _class_being_redefined = (jclass)to_jclass(class_being_redefined); 255 } 256 }; 257 const char *class_name() { 258 return _class_name; 259 } 260 jobject jloader() { 261 return _jloader; 262 } 263 jobject protection_domain() { 264 return _protection_domain; 265 } 266 jclass class_being_redefined() { 267 return _class_being_redefined; 268 } 269 }; 270 271 ////////////////////////////////////////////////////////////////////////////// 272 273 int JvmtiExport::_field_access_count = 0; 274 int JvmtiExport::_field_modification_count = 0; 275 276 bool JvmtiExport::_can_access_local_variables = false; 277 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 278 bool JvmtiExport::_can_modify_any_class = false; 279 bool JvmtiExport::_can_walk_any_space = false; 280 281 uint64_t JvmtiExport::_redefinition_count = 0; 282 bool JvmtiExport::_all_dependencies_are_recorded = false; 283 284 // 285 // field access management 286 // 287 288 // interpreter generator needs the address of the counter 289 address JvmtiExport::get_field_access_count_addr() { 290 // We don't grab a lock because we don't want to 291 // serialize field access between all threads. This means that a 292 // thread on another processor can see the wrong count value and 293 // may either miss making a needed call into post_field_access() 294 // or will make an unneeded call into post_field_access(). We pay 295 // this price to avoid slowing down the VM when we aren't watching 296 // field accesses. 297 // Other access/mutation safe by virtue of being in VM state. 298 return (address)(&_field_access_count); 299 } 300 301 // 302 // field modification management 303 // 304 305 // interpreter generator needs the address of the counter 306 address JvmtiExport::get_field_modification_count_addr() { 307 // We don't grab a lock because we don't 308 // want to serialize field modification between all threads. This 309 // means that a thread on another processor can see the wrong 310 // count value and may either miss making a needed call into 311 // post_field_modification() or will make an unneeded call into 312 // post_field_modification(). We pay this price to avoid slowing 313 // down the VM when we aren't watching field modifications. 314 // Other access/mutation safe by virtue of being in VM state. 315 return (address)(&_field_modification_count); 316 } 317 318 319 /////////////////////////////////////////////////////////////// 320 // Functions needed by java.lang.instrument for starting up javaagent. 321 /////////////////////////////////////////////////////////////// 322 323 jint 324 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 325 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 326 // has already been validated in JNI GetEnv(). 327 int major, minor, micro; 328 329 // micro version doesn't matter here (yet?) 330 decode_version_values(version, &major, &minor, µ); 331 switch (major) { 332 case 1: 333 switch (minor) { 334 case 0: // version 1.0.<micro> is recognized 335 case 1: // version 1.1.<micro> is recognized 336 case 2: // version 1.2.<micro> is recognized 337 break; 338 339 default: 340 return JNI_EVERSION; // unsupported minor version number 341 } 342 break; 343 case 9: 344 switch (minor) { 345 case 0: // version 9.0.<micro> is recognized 346 break; 347 default: 348 return JNI_EVERSION; // unsupported minor version number 349 } 350 break; 351 case 11: 352 switch (minor) { 353 case 0: // version 11.0.<micro> is recognized 354 break; 355 default: 356 return JNI_EVERSION; // unsupported minor version number 357 } 358 break; 359 default: 360 // Starting from 13 we do not care about minor version anymore 361 if (major < 13 || major > VM_Version::vm_major_version()) { 362 return JNI_EVERSION; // unsupported major version number 363 } 364 } 365 366 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 367 JavaThread* current_thread = JavaThread::current(); 368 // transition code: native to VM 369 ThreadInVMfromNative __tiv(current_thread); 370 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 371 debug_only(VMNativeEntryWrapper __vew;) 372 373 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 374 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 375 return JNI_OK; 376 377 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 378 // not live, no thread to transition 379 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 380 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 381 return JNI_OK; 382 383 } else { 384 // Called at the wrong time 385 *penv = NULL; 386 return JNI_EDETACHED; 387 } 388 } 389 390 void 391 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) { 392 if (!Universe::is_module_initialized()) { 393 return; // extra safety 394 } 395 assert(!h_module.is_null(), "module should always be set"); 396 397 // Invoke the transformedByAgent method 398 JavaValue result(T_VOID); 399 JavaCalls::call_static(&result, 400 vmClasses::module_Modules_klass(), 401 vmSymbols::transformedByAgent_name(), 402 vmSymbols::transformedByAgent_signature(), 403 h_module, 404 THREAD); 405 406 if (HAS_PENDING_EXCEPTION) { 407 LogTarget(Trace, jvmti) log; 408 LogStream log_stream(log); 409 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 410 log_stream.cr(); 411 CLEAR_PENDING_EXCEPTION; 412 return; 413 } 414 } 415 416 jvmtiError 417 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) { 418 if (!Universe::is_module_initialized()) { 419 return JVMTI_ERROR_NONE; // extra safety 420 } 421 assert(!module.is_null(), "module should always be set"); 422 assert(!to_module.is_null(), "to_module should always be set"); 423 424 // Invoke the addReads method 425 JavaValue result(T_VOID); 426 JavaCalls::call_static(&result, 427 vmClasses::module_Modules_klass(), 428 vmSymbols::addReads_name(), 429 vmSymbols::addReads_signature(), 430 module, 431 to_module, 432 THREAD); 433 434 if (HAS_PENDING_EXCEPTION) { 435 LogTarget(Trace, jvmti) log; 436 LogStream log_stream(log); 437 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 438 log_stream.cr(); 439 CLEAR_PENDING_EXCEPTION; 440 return JVMTI_ERROR_INTERNAL; 441 } 442 return JVMTI_ERROR_NONE; 443 } 444 445 jvmtiError 446 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 447 if (!Universe::is_module_initialized()) { 448 return JVMTI_ERROR_NONE; // extra safety 449 } 450 assert(!module.is_null(), "module should always be set"); 451 assert(!to_module.is_null(), "to_module should always be set"); 452 assert(!pkg_name.is_null(), "pkg_name should always be set"); 453 454 // Invoke the addExports method 455 JavaValue result(T_VOID); 456 JavaCalls::call_static(&result, 457 vmClasses::module_Modules_klass(), 458 vmSymbols::addExports_name(), 459 vmSymbols::addExports_signature(), 460 module, 461 pkg_name, 462 to_module, 463 THREAD); 464 465 if (HAS_PENDING_EXCEPTION) { 466 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 467 LogTarget(Trace, jvmti) log; 468 LogStream log_stream(log); 469 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 470 log_stream.cr(); 471 CLEAR_PENDING_EXCEPTION; 472 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 473 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 474 } 475 return JVMTI_ERROR_INTERNAL; 476 } 477 return JVMTI_ERROR_NONE; 478 } 479 480 jvmtiError 481 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 482 if (!Universe::is_module_initialized()) { 483 return JVMTI_ERROR_NONE; // extra safety 484 } 485 assert(!module.is_null(), "module should always be set"); 486 assert(!to_module.is_null(), "to_module should always be set"); 487 assert(!pkg_name.is_null(), "pkg_name should always be set"); 488 489 // Invoke the addOpens method 490 JavaValue result(T_VOID); 491 JavaCalls::call_static(&result, 492 vmClasses::module_Modules_klass(), 493 vmSymbols::addOpens_name(), 494 vmSymbols::addExports_signature(), 495 module, 496 pkg_name, 497 to_module, 498 THREAD); 499 500 if (HAS_PENDING_EXCEPTION) { 501 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 502 LogTarget(Trace, jvmti) log; 503 LogStream log_stream(log); 504 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 505 log_stream.cr(); 506 CLEAR_PENDING_EXCEPTION; 507 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 508 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 509 } 510 return JVMTI_ERROR_INTERNAL; 511 } 512 return JVMTI_ERROR_NONE; 513 } 514 515 jvmtiError 516 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) { 517 if (!Universe::is_module_initialized()) { 518 return JVMTI_ERROR_NONE; // extra safety 519 } 520 assert(!module.is_null(), "module should always be set"); 521 assert(!service.is_null(), "service should always be set"); 522 523 // Invoke the addUses method 524 JavaValue result(T_VOID); 525 JavaCalls::call_static(&result, 526 vmClasses::module_Modules_klass(), 527 vmSymbols::addUses_name(), 528 vmSymbols::addUses_signature(), 529 module, 530 service, 531 THREAD); 532 533 if (HAS_PENDING_EXCEPTION) { 534 LogTarget(Trace, jvmti) log; 535 LogStream log_stream(log); 536 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 537 log_stream.cr(); 538 CLEAR_PENDING_EXCEPTION; 539 return JVMTI_ERROR_INTERNAL; 540 } 541 return JVMTI_ERROR_NONE; 542 } 543 544 jvmtiError 545 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) { 546 if (!Universe::is_module_initialized()) { 547 return JVMTI_ERROR_NONE; // extra safety 548 } 549 assert(!module.is_null(), "module should always be set"); 550 assert(!service.is_null(), "service should always be set"); 551 assert(!impl_class.is_null(), "impl_class should always be set"); 552 553 // Invoke the addProvides method 554 JavaValue result(T_VOID); 555 JavaCalls::call_static(&result, 556 vmClasses::module_Modules_klass(), 557 vmSymbols::addProvides_name(), 558 vmSymbols::addProvides_signature(), 559 module, 560 service, 561 impl_class, 562 THREAD); 563 564 if (HAS_PENDING_EXCEPTION) { 565 LogTarget(Trace, jvmti) log; 566 LogStream log_stream(log); 567 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 568 log_stream.cr(); 569 CLEAR_PENDING_EXCEPTION; 570 return JVMTI_ERROR_INTERNAL; 571 } 572 return JVMTI_ERROR_NONE; 573 } 574 575 void 576 JvmtiExport::decode_version_values(jint version, int * major, int * minor, 577 int * micro) { 578 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 579 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 580 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 581 } 582 583 void JvmtiExport::enter_primordial_phase() { 584 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 585 } 586 587 void JvmtiExport::enter_early_start_phase() { 588 set_early_vmstart_recorded(true); 589 } 590 591 void JvmtiExport::enter_start_phase() { 592 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 593 } 594 595 void JvmtiExport::enter_onload_phase() { 596 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 597 } 598 599 void JvmtiExport::enter_live_phase() { 600 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 601 } 602 603 // 604 // JVMTI events that the VM posts to the debugger and also startup agent 605 // and call the agent's premain() for java.lang.instrument. 606 // 607 608 void JvmtiExport::post_early_vm_start() { 609 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" )); 610 611 // can now enable some events 612 JvmtiEventController::vm_start(); 613 614 JvmtiEnvIterator it; 615 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 616 // Only early vmstart envs post early VMStart event 617 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 618 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" )); 619 JavaThread *thread = JavaThread::current(); 620 JvmtiThreadEventMark jem(thread); 621 JvmtiJavaThreadEventTransition jet(thread); 622 jvmtiEventVMStart callback = env->callbacks()->VMStart; 623 if (callback != NULL) { 624 (*callback)(env->jvmti_external(), jem.jni_env()); 625 } 626 } 627 } 628 } 629 630 void JvmtiExport::post_vm_start() { 631 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" )); 632 633 // can now enable some events 634 JvmtiEventController::vm_start(); 635 636 JvmtiEnvIterator it; 637 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 638 // Early vmstart envs do not post normal VMStart event 639 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 640 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" )); 641 642 JavaThread *thread = JavaThread::current(); 643 JvmtiThreadEventMark jem(thread); 644 JvmtiJavaThreadEventTransition jet(thread); 645 jvmtiEventVMStart callback = env->callbacks()->VMStart; 646 if (callback != NULL) { 647 (*callback)(env->jvmti_external(), jem.jni_env()); 648 } 649 } 650 } 651 } 652 653 static OopStorage* _jvmti_oop_storage = NULL; 654 static OopStorage* _weak_tag_storage = NULL; 655 656 OopStorage* JvmtiExport::jvmti_oop_storage() { 657 assert(_jvmti_oop_storage != NULL, "not yet initialized"); 658 return _jvmti_oop_storage; 659 } 660 661 OopStorage* JvmtiExport::weak_tag_storage() { 662 assert(_weak_tag_storage != NULL, "not yet initialized"); 663 return _weak_tag_storage; 664 } 665 666 void JvmtiExport::initialize_oop_storage() { 667 // OopStorage needs to be created early in startup and unconditionally 668 // because of OopStorageSet static array indices. 669 _jvmti_oop_storage = OopStorageSet::create_strong("JVMTI OopStorage", mtServiceability); 670 _weak_tag_storage = OopStorageSet::create_weak("JVMTI Tag Weak OopStorage", mtServiceability); 671 _weak_tag_storage->register_num_dead_callback(&JvmtiTagMap::gc_notification); 672 } 673 674 void JvmtiExport::post_vm_initialized() { 675 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" )); 676 677 // can now enable events 678 JvmtiEventController::vm_init(); 679 680 JvmtiEnvIterator it; 681 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 682 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 683 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" )); 684 685 JavaThread *thread = JavaThread::current(); 686 JvmtiThreadEventMark jem(thread); 687 JvmtiJavaThreadEventTransition jet(thread); 688 jvmtiEventVMInit callback = env->callbacks()->VMInit; 689 if (callback != NULL) { 690 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 691 } 692 } 693 } 694 } 695 696 697 void JvmtiExport::post_vm_death() { 698 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" )); 699 700 JvmtiEnvIterator it; 701 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 702 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 703 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" )); 704 705 JavaThread *thread = JavaThread::current(); 706 JvmtiEventMark jem(thread); 707 JvmtiJavaThreadEventTransition jet(thread); 708 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 709 if (callback != NULL) { 710 (*callback)(env->jvmti_external(), jem.jni_env()); 711 } 712 } 713 } 714 715 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 716 JvmtiEventController::vm_death(); 717 } 718 719 char** 720 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 721 // Have to grab JVMTI thread state lock to be sure environment doesn't 722 // go away while we iterate them. No locks during VM bring-up. 723 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 724 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 725 } else { 726 MutexLocker mu(JvmtiThreadState_lock); 727 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 728 } 729 } 730 731 // Convert an external thread reference to a JavaThread found on the 732 // specified ThreadsList. The ThreadsListHandle in the caller "protects" 733 // the returned JavaThread *. 734 // 735 // If thread_oop_p is not NULL, then the caller wants to use the oop 736 // after this call so the oop is returned. On success, *jt_pp is set 737 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned. 738 // On error, returns various JVMTI_ERROR_* values. 739 // 740 jvmtiError 741 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list, 742 jthread thread, 743 JavaThread ** jt_pp, 744 oop * thread_oop_p) { 745 assert(t_list != NULL, "must have a ThreadsList"); 746 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 747 // thread_oop_p is optional so no assert() 748 749 oop thread_oop = JNIHandles::resolve_external_guard(thread); 750 if (thread_oop == NULL) { 751 // NULL jthread, GC'ed jthread or a bad JNI handle. 752 return JVMTI_ERROR_INVALID_THREAD; 753 } 754 // Looks like an oop at this point. 755 756 if (!thread_oop->is_a(vmClasses::Thread_klass())) { 757 // The oop is not a java.lang.Thread. 758 return JVMTI_ERROR_INVALID_THREAD; 759 } 760 // Looks like a java.lang.Thread oop at this point. 761 762 if (thread_oop_p != NULL) { 763 // Return the oop to the caller; the caller may still want 764 // the oop even if this function returns an error. 765 *thread_oop_p = thread_oop; 766 } 767 768 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 769 if (java_thread == NULL) { 770 // The java.lang.Thread does not contain a JavaThread * so it has 771 // not yet run or it has died. 772 return JVMTI_ERROR_THREAD_NOT_ALIVE; 773 } 774 // Looks like a live JavaThread at this point. 775 776 // We do not check the EnableThreadSMRExtraValidityChecks option 777 // for this includes() call because JVM/TI's spec is tighter. 778 if (!t_list->includes(java_thread)) { 779 // Not on the JavaThreads list so it is not alive. 780 return JVMTI_ERROR_THREAD_NOT_ALIVE; 781 } 782 783 // Return a live JavaThread that is "protected" by the 784 // ThreadsListHandle in the caller. 785 *jt_pp = java_thread; 786 787 return JVMTI_ERROR_NONE; 788 } 789 790 // Convert an oop to a JavaThread found on the specified ThreadsList. 791 // The ThreadsListHandle in the caller "protects" the returned 792 // JavaThread *. 793 // 794 // On success, *jt_pp is set to the converted JavaThread * and 795 // JVMTI_ERROR_NONE is returned. On error, returns various 796 // JVMTI_ERROR_* values. 797 // 798 jvmtiError 799 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop, 800 JavaThread ** jt_pp) { 801 assert(t_list != NULL, "must have a ThreadsList"); 802 assert(thread_oop != NULL, "must have an oop"); 803 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 804 805 if (!thread_oop->is_a(vmClasses::Thread_klass())) { 806 // The oop is not a java.lang.Thread. 807 return JVMTI_ERROR_INVALID_THREAD; 808 } 809 // Looks like a java.lang.Thread oop at this point. 810 811 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 812 if (java_thread == NULL) { 813 // The java.lang.Thread does not contain a JavaThread * so it has 814 // not yet run or it has died. 815 return JVMTI_ERROR_THREAD_NOT_ALIVE; 816 } 817 // Looks like a live JavaThread at this point. 818 819 // We do not check the EnableThreadSMRExtraValidityChecks option 820 // for this includes() call because JVM/TI's spec is tighter. 821 if (!t_list->includes(java_thread)) { 822 // Not on the JavaThreads list so it is not alive. 823 return JVMTI_ERROR_THREAD_NOT_ALIVE; 824 } 825 826 // Return a live JavaThread that is "protected" by the 827 // ThreadsListHandle in the caller. 828 *jt_pp = java_thread; 829 830 return JVMTI_ERROR_NONE; 831 } 832 833 class JvmtiClassFileLoadHookPoster : public StackObj { 834 private: 835 Symbol* _h_name; 836 Handle _class_loader; 837 Handle _h_protection_domain; 838 unsigned char ** _data_ptr; 839 unsigned char ** _end_ptr; 840 JavaThread * _thread; 841 jint _curr_len; 842 unsigned char * _curr_data; 843 JvmtiEnv * _curr_env; 844 JvmtiCachedClassFileData ** _cached_class_file_ptr; 845 JvmtiThreadState * _state; 846 Klass* _class_being_redefined; 847 JvmtiClassLoadKind _load_kind; 848 bool _has_been_modified; 849 850 public: 851 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 852 Handle h_protection_domain, 853 unsigned char **data_ptr, unsigned char **end_ptr, 854 JvmtiCachedClassFileData **cache_ptr) { 855 _h_name = h_name; 856 _class_loader = class_loader; 857 _h_protection_domain = h_protection_domain; 858 _data_ptr = data_ptr; 859 _end_ptr = end_ptr; 860 _thread = JavaThread::current(); 861 _curr_len = *end_ptr - *data_ptr; 862 _curr_data = *data_ptr; 863 _curr_env = NULL; 864 _cached_class_file_ptr = cache_ptr; 865 _has_been_modified = false; 866 867 _state = _thread->jvmti_thread_state(); 868 if (_state != NULL) { 869 _class_being_redefined = _state->get_class_being_redefined(); 870 _load_kind = _state->get_class_load_kind(); 871 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined; 872 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) { 873 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module(); 874 assert(module_entry != NULL, "module_entry should always be set"); 875 if (module_entry->is_named() && 876 module_entry->module() != NULL && 877 !module_entry->has_default_read_edges()) { 878 if (!module_entry->set_has_default_read_edges()) { 879 // We won a potential race. 880 // Add read edges to the unnamed modules of the bootstrap and app class loaders 881 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module 882 JvmtiExport::add_default_read_edges(class_module, _thread); 883 } 884 } 885 } 886 // Clear class_being_redefined flag here. The action 887 // from agent handler could generate a new class file load 888 // hook event and if it is not cleared the new event generated 889 // from regular class file load could have this stale redefined 890 // class handle info. 891 _state->clear_class_being_redefined(); 892 } else { 893 // redefine and retransform will always set the thread state 894 _class_being_redefined = NULL; 895 _load_kind = jvmti_class_load_kind_load; 896 } 897 } 898 899 void post() { 900 post_all_envs(); 901 copy_modified_data(); 902 } 903 904 bool has_been_modified() { return _has_been_modified; } 905 906 private: 907 void post_all_envs() { 908 if (_load_kind != jvmti_class_load_kind_retransform) { 909 // for class load and redefine, 910 // call the non-retransformable agents 911 JvmtiEnvIterator it; 912 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 913 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 914 // non-retransformable agents cannot retransform back, 915 // so no need to cache the original class file bytes 916 post_to_env(env, false); 917 } 918 } 919 } 920 JvmtiEnvIterator it; 921 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 922 // retransformable agents get all events 923 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 924 // retransformable agents need to cache the original class file 925 // bytes if changes are made via the ClassFileLoadHook 926 post_to_env(env, true); 927 } 928 } 929 } 930 931 void post_to_env(JvmtiEnv* env, bool caching_needed) { 932 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) { 933 return; 934 } 935 unsigned char *new_data = NULL; 936 jint new_len = 0; 937 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 938 _h_protection_domain, 939 _class_being_redefined); 940 JvmtiJavaThreadEventTransition jet(_thread); 941 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 942 if (callback != NULL) { 943 (*callback)(env->jvmti_external(), jem.jni_env(), 944 jem.class_being_redefined(), 945 jem.jloader(), jem.class_name(), 946 jem.protection_domain(), 947 _curr_len, _curr_data, 948 &new_len, &new_data); 949 } 950 if (new_data != NULL) { 951 // this agent has modified class data. 952 _has_been_modified = true; 953 if (caching_needed && *_cached_class_file_ptr == NULL) { 954 // data has been changed by the new retransformable agent 955 // and it hasn't already been cached, cache it 956 JvmtiCachedClassFileData *p; 957 p = (JvmtiCachedClassFileData *)os::malloc( 958 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal); 959 if (p == NULL) { 960 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len, 961 OOM_MALLOC_ERROR, 962 "unable to allocate cached copy of original class bytes"); 963 } 964 p->length = _curr_len; 965 memcpy(p->data, _curr_data, _curr_len); 966 *_cached_class_file_ptr = p; 967 } 968 969 if (_curr_data != *_data_ptr) { 970 // curr_data is previous agent modified class data. 971 // And this has been changed by the new agent so 972 // we can delete it now. 973 _curr_env->Deallocate(_curr_data); 974 } 975 976 // Class file data has changed by the current agent. 977 _curr_data = new_data; 978 _curr_len = new_len; 979 // Save the current agent env we need this to deallocate the 980 // memory allocated by this agent. 981 _curr_env = env; 982 } 983 } 984 985 void copy_modified_data() { 986 // if one of the agent has modified class file data. 987 // Copy modified class data to new resources array. 988 if (_curr_data != *_data_ptr) { 989 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 990 memcpy(*_data_ptr, _curr_data, _curr_len); 991 *_end_ptr = *_data_ptr + _curr_len; 992 _curr_env->Deallocate(_curr_data); 993 } 994 } 995 }; 996 997 bool JvmtiExport::is_early_phase() { 998 return JvmtiEnvBase::get_phase() <= JVMTI_PHASE_PRIMORDIAL; 999 } 1000 1001 bool JvmtiExport::has_early_class_hook_env() { 1002 JvmtiEnvIterator it; 1003 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1004 if (env->early_class_hook_env()) { 1005 return true; 1006 } 1007 } 1008 return false; 1009 } 1010 1011 bool JvmtiExport::_should_post_class_file_load_hook = false; 1012 1013 // this entry is for class file load hook on class load, redefine and retransform 1014 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name, 1015 Handle class_loader, 1016 Handle h_protection_domain, 1017 unsigned char **data_ptr, 1018 unsigned char **end_ptr, 1019 JvmtiCachedClassFileData **cache_ptr) { 1020 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1021 return false; 1022 } 1023 1024 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 1025 h_protection_domain, 1026 data_ptr, end_ptr, 1027 cache_ptr); 1028 poster.post(); 1029 return poster.has_been_modified(); 1030 } 1031 1032 void JvmtiExport::report_unsupported(bool on) { 1033 // If any JVMTI service is turned on, we need to exit before native code 1034 // tries to access nonexistant services. 1035 if (on) { 1036 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 1037 } 1038 } 1039 1040 1041 static inline Klass* oop_to_klass(oop obj) { 1042 Klass* k = obj->klass(); 1043 1044 // if the object is a java.lang.Class then return the java mirror 1045 if (k == vmClasses::Class_klass()) { 1046 if (!java_lang_Class::is_primitive(obj)) { 1047 k = java_lang_Class::as_Klass(obj); 1048 assert(k != NULL, "class for non-primitive mirror must exist"); 1049 } 1050 } 1051 return k; 1052 } 1053 1054 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark { 1055 private: 1056 jobject _jobj; 1057 jlong _size; 1058 public: 1059 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) { 1060 _jobj = (jobject)to_jobject(obj); 1061 _size = obj->size() * wordSize; 1062 }; 1063 jobject jni_jobject() { return _jobj; } 1064 jlong size() { return _size; } 1065 }; 1066 1067 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 1068 private: 1069 jint _code_size; 1070 const void *_code_data; 1071 jint _map_length; 1072 jvmtiAddrLocationMap *_map; 1073 const void *_compile_info; 1074 public: 1075 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 1076 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 1077 _code_data = nm->code_begin(); 1078 _code_size = nm->code_size(); 1079 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 1080 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 1081 } 1082 ~JvmtiCompiledMethodLoadEventMark() { 1083 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); 1084 } 1085 1086 jint code_size() { return _code_size; } 1087 const void *code_data() { return _code_data; } 1088 jint map_length() { return _map_length; } 1089 const jvmtiAddrLocationMap* map() { return _map; } 1090 const void *compile_info() { return _compile_info; } 1091 }; 1092 1093 1094 1095 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 1096 private: 1097 jobject _jobj; 1098 public: 1099 JvmtiMonitorEventMark(JavaThread *thread, oop object) 1100 : JvmtiThreadEventMark(thread){ 1101 _jobj = to_jobject(object); 1102 } 1103 jobject jni_object() { return _jobj; } 1104 }; 1105 1106 /////////////////////////////////////////////////////////////// 1107 // 1108 // pending CompiledMethodUnload support 1109 // 1110 1111 void JvmtiExport::post_compiled_method_unload( 1112 jmethodID method, const void *code_begin) { 1113 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1114 return; 1115 } 1116 JavaThread* thread = JavaThread::current(); 1117 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1118 ("[%s] method compile unload event triggered", 1119 JvmtiTrace::safe_get_thread_name(thread))); 1120 1121 // post the event for each environment that has this event enabled. 1122 JvmtiEnvIterator it; 1123 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1124 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 1125 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1126 continue; 1127 } 1128 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1129 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT, 1130 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 1131 1132 ResourceMark rm(thread); 1133 1134 JvmtiEventMark jem(thread); 1135 JvmtiJavaThreadEventTransition jet(thread); 1136 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 1137 if (callback != NULL) { 1138 (*callback)(env->jvmti_external(), method, code_begin); 1139 } 1140 } 1141 } 1142 } 1143 1144 /////////////////////////////////////////////////////////////// 1145 // 1146 // JvmtiExport 1147 // 1148 1149 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) { 1150 HandleMark hm(thread); 1151 methodHandle mh(thread, method); 1152 1153 JvmtiThreadState *state = thread->jvmti_thread_state(); 1154 if (state == NULL) { 1155 return; 1156 } 1157 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered", 1158 JvmtiTrace::safe_get_thread_name(thread))); 1159 JvmtiEnvThreadStateIterator it(state); 1160 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1161 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 1162 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 1163 ThreadState old_os_state = thread->osthread()->get_state(); 1164 thread->osthread()->set_state(BREAKPOINTED); 1165 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT, 1166 JvmtiTrace::safe_get_thread_name(thread), 1167 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1168 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1169 location - mh()->code_base() )); 1170 1171 JvmtiEnv *env = ets->get_env(); 1172 JvmtiLocationEventMark jem(thread, mh, location); 1173 JvmtiJavaThreadEventTransition jet(thread); 1174 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 1175 if (callback != NULL) { 1176 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1177 jem.jni_methodID(), jem.location()); 1178 } 1179 1180 ets->set_breakpoint_posted(); 1181 thread->osthread()->set_state(old_os_state); 1182 } 1183 } 1184 } 1185 1186 ////////////////////////////////////////////////////////////////////////////// 1187 1188 bool JvmtiExport::_can_get_source_debug_extension = false; 1189 bool JvmtiExport::_can_maintain_original_method_order = false; 1190 bool JvmtiExport::_can_post_interpreter_events = false; 1191 bool JvmtiExport::_can_post_on_exceptions = false; 1192 bool JvmtiExport::_can_post_breakpoint = false; 1193 bool JvmtiExport::_can_post_field_access = false; 1194 bool JvmtiExport::_can_post_field_modification = false; 1195 bool JvmtiExport::_can_post_method_entry = false; 1196 bool JvmtiExport::_can_post_method_exit = false; 1197 bool JvmtiExport::_can_pop_frame = false; 1198 bool JvmtiExport::_can_force_early_return = false; 1199 bool JvmtiExport::_can_get_owned_monitor_info = false; 1200 1201 bool JvmtiExport::_early_vmstart_recorded = false; 1202 1203 bool JvmtiExport::_should_post_single_step = false; 1204 bool JvmtiExport::_should_post_field_access = false; 1205 bool JvmtiExport::_should_post_field_modification = false; 1206 bool JvmtiExport::_should_post_class_load = false; 1207 bool JvmtiExport::_should_post_class_prepare = false; 1208 bool JvmtiExport::_should_post_class_unload = false; 1209 bool JvmtiExport::_should_post_thread_life = false; 1210 bool JvmtiExport::_should_clean_up_heap_objects = false; 1211 bool JvmtiExport::_should_post_native_method_bind = false; 1212 bool JvmtiExport::_should_post_dynamic_code_generated = false; 1213 bool JvmtiExport::_should_post_data_dump = false; 1214 bool JvmtiExport::_should_post_compiled_method_load = false; 1215 bool JvmtiExport::_should_post_compiled_method_unload = false; 1216 bool JvmtiExport::_should_post_monitor_contended_enter = false; 1217 bool JvmtiExport::_should_post_monitor_contended_entered = false; 1218 bool JvmtiExport::_should_post_monitor_wait = false; 1219 bool JvmtiExport::_should_post_monitor_waited = false; 1220 bool JvmtiExport::_should_post_garbage_collection_start = false; 1221 bool JvmtiExport::_should_post_garbage_collection_finish = false; 1222 bool JvmtiExport::_should_post_object_free = false; 1223 bool JvmtiExport::_should_post_resource_exhausted = false; 1224 bool JvmtiExport::_should_post_vm_object_alloc = false; 1225 bool JvmtiExport::_should_post_sampled_object_alloc = false; 1226 bool JvmtiExport::_should_post_on_exceptions = false; 1227 1228 //////////////////////////////////////////////////////////////////////////////////////////////// 1229 1230 1231 // 1232 // JVMTI single step management 1233 // 1234 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) { 1235 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 1236 1237 HandleMark hm(thread); 1238 methodHandle mh(thread, method); 1239 1240 // update information about current location and post a step event 1241 JvmtiThreadState *state = thread->jvmti_thread_state(); 1242 if (state == NULL) { 1243 return; 1244 } 1245 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered", 1246 JvmtiTrace::safe_get_thread_name(thread))); 1247 if (!state->hide_single_stepping()) { 1248 if (state->is_pending_step_for_popframe()) { 1249 state->process_pending_step_for_popframe(); 1250 } 1251 if (state->is_pending_step_for_earlyret()) { 1252 state->process_pending_step_for_earlyret(); 1253 } 1254 JvmtiExport::post_single_step(thread, mh(), location); 1255 } 1256 } 1257 1258 1259 void JvmtiExport::expose_single_stepping(JavaThread *thread) { 1260 JvmtiThreadState *state = thread->jvmti_thread_state(); 1261 if (state != NULL) { 1262 state->clear_hide_single_stepping(); 1263 } 1264 } 1265 1266 1267 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 1268 JvmtiThreadState *state = thread->jvmti_thread_state(); 1269 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1270 state->set_hide_single_stepping(); 1271 return true; 1272 } else { 1273 return false; 1274 } 1275 } 1276 1277 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) { 1278 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1279 return; 1280 } 1281 HandleMark hm(thread); 1282 1283 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered", 1284 JvmtiTrace::safe_get_thread_name(thread))); 1285 JvmtiThreadState* state = thread->jvmti_thread_state(); 1286 if (state == NULL) { 1287 return; 1288 } 1289 JvmtiEnvThreadStateIterator it(state); 1290 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1291 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 1292 JvmtiEnv *env = ets->get_env(); 1293 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1294 continue; 1295 } 1296 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s", 1297 JvmtiTrace::safe_get_thread_name(thread), 1298 klass==NULL? "NULL" : klass->external_name() )); 1299 JvmtiClassEventMark jem(thread, klass); 1300 JvmtiJavaThreadEventTransition jet(thread); 1301 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 1302 if (callback != NULL) { 1303 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1304 } 1305 } 1306 } 1307 } 1308 1309 1310 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) { 1311 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1312 return; 1313 } 1314 HandleMark hm(thread); 1315 1316 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered", 1317 JvmtiTrace::safe_get_thread_name(thread))); 1318 JvmtiThreadState* state = thread->jvmti_thread_state(); 1319 if (state == NULL) { 1320 return; 1321 } 1322 JvmtiEnvThreadStateIterator it(state); 1323 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1324 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 1325 JvmtiEnv *env = ets->get_env(); 1326 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1327 continue; 1328 } 1329 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s", 1330 JvmtiTrace::safe_get_thread_name(thread), 1331 klass==NULL? "NULL" : klass->external_name() )); 1332 JvmtiClassEventMark jem(thread, klass); 1333 JvmtiJavaThreadEventTransition jet(thread); 1334 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 1335 if (callback != NULL) { 1336 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1337 } 1338 } 1339 } 1340 } 1341 1342 void JvmtiExport::post_class_unload(Klass* klass) { 1343 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1344 return; 1345 } 1346 1347 // postings to the service thread so that it can perform them in a safe 1348 // context and in-order. 1349 ResourceMark rm; 1350 // JvmtiDeferredEvent copies the string. 1351 JvmtiDeferredEvent event = JvmtiDeferredEvent::class_unload_event(klass->name()->as_C_string()); 1352 ServiceThread::enqueue_deferred_event(&event); 1353 } 1354 1355 1356 void JvmtiExport::post_class_unload_internal(const char* name) { 1357 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1358 return; 1359 } 1360 assert(Thread::current()->is_service_thread(), "must be called from ServiceThread"); 1361 JavaThread *thread = JavaThread::current(); 1362 HandleMark hm(thread); 1363 1364 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" )); 1365 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1366 1367 JvmtiEnvIterator it; 1368 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1369 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1370 continue; 1371 } 1372 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1373 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s", name)); 1374 1375 JvmtiEventMark jem(thread); 1376 JvmtiJavaThreadEventTransition jet(thread); 1377 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 1378 if (callback != NULL) { 1379 (*callback)(env->jvmti_external(), jem.jni_env(), name); 1380 } 1381 } 1382 } 1383 } 1384 } 1385 1386 1387 void JvmtiExport::post_thread_start(JavaThread *thread) { 1388 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1389 return; 1390 } 1391 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1392 1393 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered", 1394 JvmtiTrace::safe_get_thread_name(thread))); 1395 1396 // do JVMTI thread initialization (if needed) 1397 JvmtiEventController::thread_started(thread); 1398 1399 // Do not post thread start event for hidden java thread. 1400 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1401 !thread->is_hidden_from_external_view()) { 1402 JvmtiEnvIterator it; 1403 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1404 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1405 continue; 1406 } 1407 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1408 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent", 1409 JvmtiTrace::safe_get_thread_name(thread) )); 1410 1411 JvmtiThreadEventMark jem(thread); 1412 JvmtiJavaThreadEventTransition jet(thread); 1413 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1414 if (callback != NULL) { 1415 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1416 } 1417 } 1418 } 1419 } 1420 } 1421 1422 1423 void JvmtiExport::post_thread_end(JavaThread *thread) { 1424 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1425 return; 1426 } 1427 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered", 1428 JvmtiTrace::safe_get_thread_name(thread))); 1429 1430 JvmtiThreadState *state = thread->jvmti_thread_state(); 1431 if (state == NULL) { 1432 return; 1433 } 1434 1435 // Do not post thread end event for hidden java thread. 1436 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1437 !thread->is_hidden_from_external_view()) { 1438 1439 JvmtiEnvThreadStateIterator it(state); 1440 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1441 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1442 JvmtiEnv *env = ets->get_env(); 1443 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1444 continue; 1445 } 1446 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent", 1447 JvmtiTrace::safe_get_thread_name(thread) )); 1448 1449 JvmtiThreadEventMark jem(thread); 1450 JvmtiJavaThreadEventTransition jet(thread); 1451 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1452 if (callback != NULL) { 1453 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1454 } 1455 } 1456 } 1457 } 1458 } 1459 1460 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1461 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1462 1463 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" )); 1464 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent")); 1465 1466 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1467 if (callback != NULL) { 1468 (*callback)(env->jvmti_external(), tag); 1469 } 1470 } 1471 1472 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1473 1474 JavaThread *thread = JavaThread::current(); 1475 1476 log_error(jvmti)("Posting Resource Exhausted event: %s", 1477 description != nullptr ? description : "unknown"); 1478 1479 // JDK-8213834: handlers of ResourceExhausted may attempt some analysis 1480 // which often requires running java. 1481 // This will cause problems on threads not able to run java, e.g. compiler 1482 // threads. To forestall these problems, we therefore suppress sending this 1483 // event from threads which are not able to run java. 1484 if (!thread->can_call_java()) { 1485 return; 1486 } 1487 1488 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" )); 1489 1490 JvmtiEnvIterator it; 1491 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1492 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1493 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" )); 1494 1495 JvmtiThreadEventMark jem(thread); 1496 JvmtiJavaThreadEventTransition jet(thread); 1497 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1498 if (callback != NULL) { 1499 (*callback)(env->jvmti_external(), jem.jni_env(), 1500 resource_exhausted_flags, NULL, description); 1501 } 1502 } 1503 } 1504 } 1505 1506 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) { 1507 HandleMark hm(thread); 1508 methodHandle mh(thread, method); 1509 1510 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s", 1511 JvmtiTrace::safe_get_thread_name(thread), 1512 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1513 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1514 1515 JvmtiThreadState* state = thread->jvmti_thread_state(); 1516 if (state == NULL || !state->is_interp_only_mode()) { 1517 // for any thread that actually wants method entry, interp_only_mode is set 1518 return; 1519 } 1520 1521 state->incr_cur_stack_depth(); 1522 1523 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1524 JvmtiEnvThreadStateIterator it(state); 1525 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1526 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1527 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s", 1528 JvmtiTrace::safe_get_thread_name(thread), 1529 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1530 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1531 1532 JvmtiEnv *env = ets->get_env(); 1533 JvmtiMethodEventMark jem(thread, mh); 1534 JvmtiJavaThreadEventTransition jet(thread); 1535 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1536 if (callback != NULL) { 1537 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1538 } 1539 } 1540 } 1541 } 1542 } 1543 1544 void JvmtiExport::post_method_exit(JavaThread* thread, Method* method, frame current_frame) { 1545 HandleMark hm(thread); 1546 methodHandle mh(thread, method); 1547 1548 JvmtiThreadState *state = thread->jvmti_thread_state(); 1549 1550 if (state == NULL || !state->is_interp_only_mode()) { 1551 // for any thread that actually wants method exit, interp_only_mode is set 1552 return; 1553 } 1554 1555 // return a flag when a method terminates by throwing an exception 1556 // i.e. if an exception is thrown and it's not caught by the current method 1557 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1558 Handle result; 1559 jvalue value; 1560 value.j = 0L; 1561 1562 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1563 // if the method hasn't been popped because of an exception then we populate 1564 // the return_value parameter for the callback. At this point we only have 1565 // the address of a "raw result" and we just call into the interpreter to 1566 // convert this into a jvalue. 1567 if (!exception_exit) { 1568 oop oop_result; 1569 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1570 if (is_reference_type(type)) { 1571 result = Handle(thread, oop_result); 1572 value.l = JNIHandles::make_local(thread, result()); 1573 } 1574 } 1575 } 1576 1577 // Deferred transition to VM, so we can stash away the return oop before GC 1578 // Note that this transition is not needed when throwing an exception, because 1579 // there is no oop to retain. 1580 JavaThread* current = thread; // for JRT_BLOCK 1581 JRT_BLOCK 1582 post_method_exit_inner(thread, mh, state, exception_exit, current_frame, value); 1583 JRT_BLOCK_END 1584 1585 if (result.not_null() && !mh->is_native()) { 1586 // We have to restore the oop on the stack for interpreter frames 1587 *(oop*)current_frame.interpreter_frame_tos_address() = result(); 1588 } 1589 } 1590 1591 void JvmtiExport::post_method_exit_inner(JavaThread* thread, 1592 methodHandle& mh, 1593 JvmtiThreadState *state, 1594 bool exception_exit, 1595 frame current_frame, 1596 jvalue& value) { 1597 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s", 1598 JvmtiTrace::safe_get_thread_name(thread), 1599 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1600 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1601 1602 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1603 JvmtiEnvThreadStateIterator it(state); 1604 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1605 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1606 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s", 1607 JvmtiTrace::safe_get_thread_name(thread), 1608 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1609 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1610 1611 JvmtiEnv *env = ets->get_env(); 1612 JvmtiMethodEventMark jem(thread, mh); 1613 JvmtiJavaThreadEventTransition jet(thread); 1614 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1615 if (callback != NULL) { 1616 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1617 jem.jni_methodID(), exception_exit, value); 1618 } 1619 } 1620 } 1621 } 1622 1623 JvmtiEnvThreadStateIterator it(state); 1624 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1625 if (ets->has_frame_pops()) { 1626 int cur_frame_number = state->cur_stack_depth(); 1627 1628 if (ets->is_frame_pop(cur_frame_number)) { 1629 // we have a NotifyFramePop entry for this frame. 1630 // now check that this env/thread wants this event 1631 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1632 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s", 1633 JvmtiTrace::safe_get_thread_name(thread), 1634 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1635 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1636 1637 // we also need to issue a frame pop event for this frame 1638 JvmtiEnv *env = ets->get_env(); 1639 JvmtiMethodEventMark jem(thread, mh); 1640 JvmtiJavaThreadEventTransition jet(thread); 1641 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1642 if (callback != NULL) { 1643 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1644 jem.jni_methodID(), exception_exit); 1645 } 1646 } 1647 // remove the frame's entry 1648 { 1649 MutexLocker mu(JvmtiThreadState_lock); 1650 ets->clear_frame_pop(cur_frame_number); 1651 } 1652 } 1653 } 1654 } 1655 1656 state->decr_cur_stack_depth(); 1657 } 1658 1659 1660 // Todo: inline this for optimization 1661 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) { 1662 HandleMark hm(thread); 1663 methodHandle mh(thread, method); 1664 1665 JvmtiThreadState *state = thread->jvmti_thread_state(); 1666 if (state == NULL) { 1667 return; 1668 } 1669 JvmtiEnvThreadStateIterator it(state); 1670 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1671 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1672 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1673 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT, 1674 JvmtiTrace::safe_get_thread_name(thread), 1675 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1676 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1677 location - mh()->code_base() )); 1678 1679 JvmtiEnv *env = ets->get_env(); 1680 JvmtiLocationEventMark jem(thread, mh, location); 1681 JvmtiJavaThreadEventTransition jet(thread); 1682 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1683 if (callback != NULL) { 1684 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1685 jem.jni_methodID(), jem.location()); 1686 } 1687 1688 ets->set_single_stepping_posted(); 1689 } 1690 } 1691 } 1692 1693 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) { 1694 HandleMark hm(thread); 1695 methodHandle mh(thread, method); 1696 Handle exception_handle(thread, exception); 1697 1698 JvmtiThreadState *state = thread->jvmti_thread_state(); 1699 if (state == NULL) { 1700 return; 1701 } 1702 1703 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered", 1704 JvmtiTrace::safe_get_thread_name(thread))); 1705 if (!state->is_exception_detected()) { 1706 state->set_exception_detected(); 1707 JvmtiEnvThreadStateIterator it(state); 1708 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1709 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1710 1711 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1712 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT, 1713 JvmtiTrace::safe_get_thread_name(thread), 1714 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1715 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1716 location - mh()->code_base() )); 1717 1718 JvmtiEnv *env = ets->get_env(); 1719 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1720 1721 // It's okay to clear these exceptions here because we duplicate 1722 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1723 EXCEPTION_MARK; 1724 1725 bool should_repeat; 1726 vframeStream st(thread); 1727 assert(!st.at_end(), "cannot be at end"); 1728 Method* current_method = NULL; 1729 // A GC may occur during the Method::fast_exception_handler_bci_for() 1730 // call below if it needs to load the constraint class. Using a 1731 // methodHandle to keep the 'current_method' from being deallocated 1732 // if GC happens. 1733 methodHandle current_mh = methodHandle(thread, current_method); 1734 int current_bci = -1; 1735 do { 1736 current_method = st.method(); 1737 current_mh = methodHandle(thread, current_method); 1738 current_bci = st.bci(); 1739 do { 1740 should_repeat = false; 1741 Klass* eh_klass = exception_handle()->klass(); 1742 current_bci = Method::fast_exception_handler_bci_for( 1743 current_mh, eh_klass, current_bci, THREAD); 1744 if (HAS_PENDING_EXCEPTION) { 1745 exception_handle = Handle(thread, PENDING_EXCEPTION); 1746 CLEAR_PENDING_EXCEPTION; 1747 should_repeat = true; 1748 } 1749 } while (should_repeat && (current_bci != -1)); 1750 st.next(); 1751 } while ((current_bci < 0) && (!st.at_end())); 1752 1753 jmethodID catch_jmethodID; 1754 if (current_bci < 0) { 1755 catch_jmethodID = 0; 1756 current_bci = 0; 1757 } else { 1758 catch_jmethodID = jem.to_jmethodID(current_mh); 1759 } 1760 1761 JvmtiJavaThreadEventTransition jet(thread); 1762 jvmtiEventException callback = env->callbacks()->Exception; 1763 if (callback != NULL) { 1764 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1765 jem.jni_methodID(), jem.location(), 1766 jem.exception(), 1767 catch_jmethodID, current_bci); 1768 } 1769 } 1770 } 1771 } 1772 1773 // frames may get popped because of this throw, be safe - invalidate cached depth 1774 state->invalidate_cur_stack_depth(); 1775 } 1776 1777 1778 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) { 1779 HandleMark hm(thread); 1780 methodHandle mh(thread, method); 1781 Handle exception_handle(thread, exception); 1782 1783 JvmtiThreadState *state = thread->jvmti_thread_state(); 1784 if (state == NULL) { 1785 return; 1786 } 1787 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1788 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s", 1789 JvmtiTrace::safe_get_thread_name(thread), 1790 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1791 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1792 location==0? "no location:" : "", 1793 location==0? 0 : location - mh()->code_base(), 1794 in_handler_frame? "in handler frame" : "not handler frame" )); 1795 1796 if (state->is_exception_detected()) { 1797 1798 state->invalidate_cur_stack_depth(); 1799 if (!in_handler_frame) { 1800 // Not in exception handler. 1801 if(state->is_interp_only_mode()) { 1802 // method exit and frame pop events are posted only in interp mode. 1803 // When these events are enabled code should be in running in interp mode. 1804 jvalue no_value; 1805 no_value.j = 0L; 1806 JvmtiExport::post_method_exit_inner(thread, mh, state, true, thread->last_frame(), no_value); 1807 // The cached cur_stack_depth might have changed from the 1808 // operations of frame pop or method exit. We are not 100% sure 1809 // the cached cur_stack_depth is still valid depth so invalidate 1810 // it. 1811 state->invalidate_cur_stack_depth(); 1812 } 1813 } else { 1814 // In exception handler frame. Report exception catch. 1815 assert(location != NULL, "must be a known location"); 1816 // Update cur_stack_depth - the frames above the current frame 1817 // have been unwound due to this exception: 1818 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1819 state->set_exception_caught(); 1820 1821 JvmtiEnvThreadStateIterator it(state); 1822 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1823 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1824 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1825 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT, 1826 JvmtiTrace::safe_get_thread_name(thread), 1827 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1828 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1829 location - mh()->code_base() )); 1830 1831 JvmtiEnv *env = ets->get_env(); 1832 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1833 JvmtiJavaThreadEventTransition jet(thread); 1834 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1835 if (callback != NULL) { 1836 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1837 jem.jni_methodID(), jem.location(), 1838 jem.exception()); 1839 } 1840 } 1841 } 1842 } 1843 } 1844 } 1845 1846 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1847 Klass* klass, jfieldID fieldID, bool is_static) { 1848 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1849 // At least one field access watch is set so we have more work to do. 1850 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1851 // event posting can block so refetch oop if we were passed a jobj 1852 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1853 } 1854 return obj; 1855 } 1856 1857 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1858 Klass* klass, jfieldID fieldID, bool is_static) { 1859 // We must be called with a Java context in order to provide reasonable 1860 // values for the klazz, method, and location fields. The callers of this 1861 // function don't make the call unless there is a Java context. 1862 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1863 1864 ResourceMark rm; 1865 fieldDescriptor fd; 1866 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1867 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1868 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1869 if (!valid_fieldID) return; 1870 // field accesses are not watched so bail 1871 if (!fd.is_field_access_watched()) return; 1872 1873 HandleMark hm(thread); 1874 Handle h_obj; 1875 if (!is_static) { 1876 // non-static field accessors have an object, but we need a handle 1877 assert(obj != NULL, "non-static needs an object"); 1878 h_obj = Handle(thread, obj); 1879 } 1880 post_field_access(thread, 1881 thread->last_frame().interpreter_frame_method(), 1882 thread->last_frame().interpreter_frame_bcp(), 1883 klass, h_obj, fieldID); 1884 } 1885 1886 void JvmtiExport::post_field_access(JavaThread *thread, Method* method, 1887 address location, Klass* field_klass, Handle object, jfieldID field) { 1888 1889 HandleMark hm(thread); 1890 methodHandle mh(thread, method); 1891 1892 JvmtiThreadState *state = thread->jvmti_thread_state(); 1893 if (state == NULL) { 1894 return; 1895 } 1896 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered", 1897 JvmtiTrace::safe_get_thread_name(thread))); 1898 JvmtiEnvThreadStateIterator it(state); 1899 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1900 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1901 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT, 1902 JvmtiTrace::safe_get_thread_name(thread), 1903 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1904 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1905 location - mh()->code_base() )); 1906 1907 JvmtiEnv *env = ets->get_env(); 1908 JvmtiLocationEventMark jem(thread, mh, location); 1909 jclass field_jclass = jem.to_jclass(field_klass); 1910 jobject field_jobject = jem.to_jobject(object()); 1911 JvmtiJavaThreadEventTransition jet(thread); 1912 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1913 if (callback != NULL) { 1914 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1915 jem.jni_methodID(), jem.location(), 1916 field_jclass, field_jobject, field); 1917 } 1918 } 1919 } 1920 } 1921 1922 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1923 Klass* klass, jfieldID fieldID, bool is_static, 1924 char sig_type, jvalue *value) { 1925 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1926 // At least one field modification watch is set so we have more work to do. 1927 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1928 // event posting can block so refetch oop if we were passed a jobj 1929 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1930 } 1931 return obj; 1932 } 1933 1934 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1935 Klass* klass, jfieldID fieldID, bool is_static, 1936 char sig_type, jvalue *value) { 1937 // We must be called with a Java context in order to provide reasonable 1938 // values for the klazz, method, and location fields. The callers of this 1939 // function don't make the call unless there is a Java context. 1940 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1941 1942 ResourceMark rm; 1943 fieldDescriptor fd; 1944 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1945 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1946 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1947 if (!valid_fieldID) return; 1948 // field modifications are not watched so bail 1949 if (!fd.is_field_modification_watched()) return; 1950 1951 HandleMark hm(thread); 1952 1953 Handle h_obj; 1954 if (!is_static) { 1955 // non-static field accessors have an object, but we need a handle 1956 assert(obj != NULL, "non-static needs an object"); 1957 h_obj = Handle(thread, obj); 1958 } 1959 post_field_modification(thread, 1960 thread->last_frame().interpreter_frame_method(), 1961 thread->last_frame().interpreter_frame_bcp(), 1962 klass, h_obj, fieldID, sig_type, value); 1963 } 1964 1965 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method, 1966 address location, Klass* field_klass, Handle object, jfieldID field, 1967 char sig_type, jvalue *value) { 1968 1969 if (sig_type == JVM_SIGNATURE_INT || sig_type == JVM_SIGNATURE_BOOLEAN || 1970 sig_type == JVM_SIGNATURE_BYTE || sig_type == JVM_SIGNATURE_CHAR || 1971 sig_type == JVM_SIGNATURE_SHORT) { 1972 // 'I' instructions are used for byte, char, short and int. 1973 // determine which it really is, and convert 1974 fieldDescriptor fd; 1975 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd); 1976 // should be found (if not, leave as is) 1977 if (found) { 1978 jint ival = value->i; 1979 // convert value from int to appropriate type 1980 switch (fd.field_type()) { 1981 case T_BOOLEAN: 1982 sig_type = JVM_SIGNATURE_BOOLEAN; 1983 value->i = 0; // clear it 1984 value->z = (jboolean)ival; 1985 break; 1986 case T_BYTE: 1987 sig_type = JVM_SIGNATURE_BYTE; 1988 value->i = 0; // clear it 1989 value->b = (jbyte)ival; 1990 break; 1991 case T_CHAR: 1992 sig_type = JVM_SIGNATURE_CHAR; 1993 value->i = 0; // clear it 1994 value->c = (jchar)ival; 1995 break; 1996 case T_SHORT: 1997 sig_type = JVM_SIGNATURE_SHORT; 1998 value->i = 0; // clear it 1999 value->s = (jshort)ival; 2000 break; 2001 case T_INT: 2002 // nothing to do 2003 break; 2004 default: 2005 // this is an integer instruction, should be one of above 2006 ShouldNotReachHere(); 2007 break; 2008 } 2009 } 2010 } 2011 2012 assert(sig_type != JVM_SIGNATURE_ARRAY, "array should have sig_type == 'L'"); 2013 bool handle_created = false; 2014 2015 // convert oop to JNI handle. 2016 if (sig_type == JVM_SIGNATURE_CLASS || sig_type == JVM_SIGNATURE_PRIMITIVE_OBJECT) { 2017 handle_created = true; 2018 value->l = (jobject)JNIHandles::make_local(thread, cast_to_oop(value->l)); 2019 } 2020 2021 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 2022 2023 // Destroy the JNI handle allocated above. 2024 if (handle_created) { 2025 JNIHandles::destroy_local(value->l); 2026 } 2027 } 2028 2029 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method, 2030 address location, Klass* field_klass, Handle object, jfieldID field, 2031 char sig_type, jvalue *value_ptr) { 2032 2033 HandleMark hm(thread); 2034 methodHandle mh(thread, method); 2035 2036 JvmtiThreadState *state = thread->jvmti_thread_state(); 2037 if (state == NULL) { 2038 return; 2039 } 2040 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2041 ("[%s] Trg Field Modification event triggered", 2042 JvmtiTrace::safe_get_thread_name(thread))); 2043 2044 JvmtiEnvThreadStateIterator it(state); 2045 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2046 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 2047 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2048 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT, 2049 JvmtiTrace::safe_get_thread_name(thread), 2050 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 2051 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 2052 location - mh()->code_base() )); 2053 2054 JvmtiEnv *env = ets->get_env(); 2055 JvmtiLocationEventMark jem(thread, mh, location); 2056 jclass field_jclass = jem.to_jclass(field_klass); 2057 jobject field_jobject = jem.to_jobject(object()); 2058 JvmtiJavaThreadEventTransition jet(thread); 2059 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 2060 if (callback != NULL) { 2061 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2062 jem.jni_methodID(), jem.location(), 2063 field_jclass, field_jobject, field, sig_type, *value_ptr); 2064 } 2065 } 2066 } 2067 } 2068 2069 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) { 2070 JavaThread* thread = JavaThread::current(); 2071 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 2072 2073 HandleMark hm(thread); 2074 methodHandle mh(thread, method); 2075 2076 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered", 2077 JvmtiTrace::safe_get_thread_name(thread))); 2078 2079 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2080 JvmtiEnvIterator it; 2081 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2082 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2083 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent", 2084 JvmtiTrace::safe_get_thread_name(thread) )); 2085 2086 JvmtiMethodEventMark jem(thread, mh); 2087 JvmtiJavaThreadEventTransition jet(thread); 2088 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env(); 2089 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 2090 if (callback != NULL) { 2091 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 2092 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 2093 } 2094 } 2095 } 2096 } 2097 } 2098 2099 // Returns a record containing inlining information for the given nmethod 2100 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 2101 jint numstackframes = 0; 2102 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 2103 record->header.kind = JVMTI_CMLR_INLINE_INFO; 2104 record->header.next = NULL; 2105 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 2106 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 2107 record->numpcs = 0; 2108 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2109 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2110 record->numpcs++; 2111 } 2112 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 2113 int scope = 0; 2114 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2115 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2116 void* pc_address = (void*)p->real_pc(nm); 2117 assert(pc_address != NULL, "pc_address must be non-null"); 2118 record->pcinfo[scope].pc = pc_address; 2119 numstackframes=0; 2120 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2121 numstackframes++; 2122 } 2123 assert(numstackframes != 0, "numstackframes must be nonzero."); 2124 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 2125 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 2126 record->pcinfo[scope].numstackframes = numstackframes; 2127 int stackframe = 0; 2128 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2129 // sd->method() can be NULL for stubs but not for nmethods. To be completely robust, include an assert that we should never see a null sd->method() 2130 guarantee(sd->method() != NULL, "sd->method() cannot be null."); 2131 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 2132 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 2133 stackframe++; 2134 } 2135 scope++; 2136 } 2137 return record; 2138 } 2139 2140 void JvmtiExport::post_compiled_method_load(nmethod *nm) { 2141 guarantee(!nm->is_unloading(), "nmethod isn't unloaded or unloading"); 2142 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 2143 return; 2144 } 2145 JavaThread* thread = JavaThread::current(); 2146 2147 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2148 ("[%s] method compile load event triggered", 2149 JvmtiTrace::safe_get_thread_name(thread))); 2150 2151 JvmtiEnvIterator it; 2152 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2153 post_compiled_method_load(env, nm); 2154 } 2155 } 2156 2157 // post a COMPILED_METHOD_LOAD event for a given environment 2158 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, nmethod *nm) { 2159 if (env->phase() == JVMTI_PHASE_PRIMORDIAL || !env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 2160 return; 2161 } 2162 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 2163 if (callback == NULL) { 2164 return; 2165 } 2166 JavaThread* thread = JavaThread::current(); 2167 2168 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2169 ("[%s] method compile load event sent %s.%s ", 2170 JvmtiTrace::safe_get_thread_name(thread), 2171 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 2172 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 2173 ResourceMark rm(thread); 2174 HandleMark hm(thread); 2175 2176 assert(!nm->is_zombie(), "nmethod zombie in post_compiled_method_load"); 2177 // Add inlining information 2178 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 2179 // Pass inlining information through the void pointer 2180 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 2181 JvmtiJavaThreadEventTransition jet(thread); 2182 (*callback)(env->jvmti_external(), jem.jni_methodID(), 2183 jem.code_size(), jem.code_data(), jem.map_length(), 2184 jem.map(), jem.compile_info()); 2185 } 2186 2187 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 2188 assert(name != NULL && name[0] != '\0', "sanity check"); 2189 2190 JavaThread* thread = JavaThread::current(); 2191 // In theory everyone coming thru here is in_vm but we need to be certain 2192 // because a callee will do a vm->native transition 2193 ThreadInVMfromUnknown __tiv; 2194 2195 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2196 ("[%s] method dynamic code generated event triggered", 2197 JvmtiTrace::safe_get_thread_name(thread))); 2198 JvmtiEnvIterator it; 2199 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2200 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2201 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2202 ("[%s] dynamic code generated event sent for %s", 2203 JvmtiTrace::safe_get_thread_name(thread), name)); 2204 JvmtiEventMark jem(thread); 2205 JvmtiJavaThreadEventTransition jet(thread); 2206 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2207 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2208 if (callback != NULL) { 2209 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2210 } 2211 } 2212 } 2213 } 2214 2215 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 2216 jvmtiPhase phase = JvmtiEnv::get_phase(); 2217 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 2218 post_dynamic_code_generated_internal(name, code_begin, code_end); 2219 } else { 2220 // It may not be safe to post the event from this thread. Defer all 2221 // postings to the service thread so that it can perform them in a safe 2222 // context and in-order. 2223 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 2224 name, code_begin, code_end); 2225 ServiceThread::enqueue_deferred_event(&event); 2226 } 2227 } 2228 2229 2230 // post a DYNAMIC_CODE_GENERATED event for a given environment 2231 // used by GenerateEvents 2232 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 2233 const void *code_begin, const void *code_end) 2234 { 2235 JavaThread* thread = JavaThread::current(); 2236 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2237 ("[%s] dynamic code generated event triggered (by GenerateEvents)", 2238 JvmtiTrace::safe_get_thread_name(thread))); 2239 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2240 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2241 ("[%s] dynamic code generated event sent for %s", 2242 JvmtiTrace::safe_get_thread_name(thread), name)); 2243 JvmtiEventMark jem(thread); 2244 JvmtiJavaThreadEventTransition jet(thread); 2245 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2246 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2247 if (callback != NULL) { 2248 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2249 } 2250 } 2251 } 2252 2253 // post a DynamicCodeGenerated event while holding locks in the VM. 2254 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 2255 address code_begin, address code_end) 2256 { 2257 // register the stub with the current dynamic code event collector 2258 // Cannot take safepoint here so do not use state_for to get 2259 // jvmti thread state. 2260 // The collector and/or state might be NULL if JvmtiDynamicCodeEventCollector 2261 // has been initialized while JVMTI_EVENT_DYNAMIC_CODE_GENERATED was disabled. 2262 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2263 if (state != NULL) { 2264 JvmtiDynamicCodeEventCollector *collector = state->get_dynamic_code_event_collector(); 2265 if (collector != NULL) { 2266 collector->register_stub(name, code_begin, code_end); 2267 } 2268 } 2269 } 2270 2271 // Collect all the vm internally allocated objects which are visible to java world 2272 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 2273 Thread* thread = Thread::current_or_null(); 2274 if (thread != NULL && thread->is_Java_thread()) { 2275 // Can not take safepoint here. 2276 NoSafepointVerifier no_sfpt; 2277 // Cannot take safepoint here so do not use state_for to get 2278 // jvmti thread state. 2279 JvmtiThreadState *state = JavaThread::cast(thread)->jvmti_thread_state(); 2280 if (state != NULL) { 2281 // state is non NULL when VMObjectAllocEventCollector is enabled. 2282 JvmtiVMObjectAllocEventCollector *collector; 2283 collector = state->get_vm_object_alloc_event_collector(); 2284 if (collector != NULL && collector->is_enabled()) { 2285 // Don't record classes as these will be notified via the ClassLoad 2286 // event. 2287 if (obj->klass() != vmClasses::Class_klass()) { 2288 collector->record_allocation(obj); 2289 } 2290 } 2291 } 2292 } 2293 } 2294 2295 // Collect all the sampled allocated objects. 2296 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) { 2297 Thread* thread = Thread::current_or_null(); 2298 if (thread != NULL && thread->is_Java_thread()) { 2299 // Can not take safepoint here. 2300 NoSafepointVerifier no_sfpt; 2301 // Cannot take safepoint here so do not use state_for to get 2302 // jvmti thread state. 2303 JvmtiThreadState *state = JavaThread::cast(thread)->jvmti_thread_state(); 2304 if (state != NULL) { 2305 // state is non NULL when SampledObjectAllocEventCollector is enabled. 2306 JvmtiSampledObjectAllocEventCollector *collector; 2307 collector = state->get_sampled_object_alloc_event_collector(); 2308 2309 if (collector != NULL && collector->is_enabled()) { 2310 collector->record_allocation(obj); 2311 } 2312 } 2313 } 2314 } 2315 2316 void JvmtiExport::post_garbage_collection_finish() { 2317 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 2318 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2319 ("[%s] garbage collection finish event triggered", 2320 JvmtiTrace::safe_get_thread_name(thread))); 2321 JvmtiEnvIterator it; 2322 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2323 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 2324 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2325 ("[%s] garbage collection finish event sent", 2326 JvmtiTrace::safe_get_thread_name(thread))); 2327 JvmtiThreadEventTransition jet(thread); 2328 // JNIEnv is NULL here because this event is posted from VM Thread 2329 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 2330 if (callback != NULL) { 2331 (*callback)(env->jvmti_external()); 2332 } 2333 } 2334 } 2335 } 2336 2337 void JvmtiExport::post_garbage_collection_start() { 2338 Thread* thread = Thread::current(); // this event is posted from vm-thread. 2339 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2340 ("[%s] garbage collection start event triggered", 2341 JvmtiTrace::safe_get_thread_name(thread))); 2342 JvmtiEnvIterator it; 2343 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2344 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 2345 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2346 ("[%s] garbage collection start event sent", 2347 JvmtiTrace::safe_get_thread_name(thread))); 2348 JvmtiThreadEventTransition jet(thread); 2349 // JNIEnv is NULL here because this event is posted from VM Thread 2350 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 2351 if (callback != NULL) { 2352 (*callback)(env->jvmti_external()); 2353 } 2354 } 2355 } 2356 } 2357 2358 void JvmtiExport::post_data_dump() { 2359 Thread *thread = Thread::current(); 2360 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2361 ("[%s] data dump request event triggered", 2362 JvmtiTrace::safe_get_thread_name(thread))); 2363 JvmtiEnvIterator it; 2364 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2365 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 2366 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2367 ("[%s] data dump request event sent", 2368 JvmtiTrace::safe_get_thread_name(thread))); 2369 JvmtiThreadEventTransition jet(thread); 2370 // JNIEnv is NULL here because this event is posted from VM Thread 2371 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 2372 if (callback != NULL) { 2373 (*callback)(env->jvmti_external()); 2374 } 2375 } 2376 } 2377 } 2378 2379 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 2380 oop object = obj_mntr->object(); 2381 JvmtiThreadState *state = thread->jvmti_thread_state(); 2382 if (state == NULL) { 2383 return; 2384 } 2385 2386 HandleMark hm(thread); 2387 Handle h(thread, object); 2388 2389 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2390 ("[%s] monitor contended enter event triggered", 2391 JvmtiTrace::safe_get_thread_name(thread))); 2392 2393 JvmtiEnvThreadStateIterator it(state); 2394 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2395 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2396 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2397 ("[%s] monitor contended enter event sent", 2398 JvmtiTrace::safe_get_thread_name(thread))); 2399 JvmtiMonitorEventMark jem(thread, h()); 2400 JvmtiEnv *env = ets->get_env(); 2401 JvmtiThreadEventTransition jet(thread); 2402 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2403 if (callback != NULL) { 2404 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2405 } 2406 } 2407 } 2408 } 2409 2410 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2411 oop object = obj_mntr->object(); 2412 JvmtiThreadState *state = thread->jvmti_thread_state(); 2413 if (state == NULL) { 2414 return; 2415 } 2416 2417 HandleMark hm(thread); 2418 Handle h(thread, object); 2419 2420 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2421 ("[%s] monitor contended entered event triggered", 2422 JvmtiTrace::safe_get_thread_name(thread))); 2423 2424 JvmtiEnvThreadStateIterator it(state); 2425 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2426 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2427 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2428 ("[%s] monitor contended enter event sent", 2429 JvmtiTrace::safe_get_thread_name(thread))); 2430 JvmtiMonitorEventMark jem(thread, h()); 2431 JvmtiEnv *env = ets->get_env(); 2432 JvmtiThreadEventTransition jet(thread); 2433 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2434 if (callback != NULL) { 2435 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2436 } 2437 } 2438 } 2439 } 2440 2441 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2442 jlong timeout) { 2443 JvmtiThreadState *state = thread->jvmti_thread_state(); 2444 if (state == NULL) { 2445 return; 2446 } 2447 2448 HandleMark hm(thread); 2449 Handle h(thread, object); 2450 2451 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2452 ("[%s] monitor wait event triggered", 2453 JvmtiTrace::safe_get_thread_name(thread))); 2454 2455 JvmtiEnvThreadStateIterator it(state); 2456 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2457 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2458 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2459 ("[%s] monitor wait event sent", 2460 JvmtiTrace::safe_get_thread_name(thread))); 2461 JvmtiMonitorEventMark jem(thread, h()); 2462 JvmtiEnv *env = ets->get_env(); 2463 JvmtiThreadEventTransition jet(thread); 2464 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2465 if (callback != NULL) { 2466 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2467 jem.jni_object(), timeout); 2468 } 2469 } 2470 } 2471 } 2472 2473 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2474 oop object = obj_mntr->object(); 2475 JvmtiThreadState *state = thread->jvmti_thread_state(); 2476 if (state == NULL) { 2477 return; 2478 } 2479 2480 HandleMark hm(thread); 2481 Handle h(thread, object); 2482 2483 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2484 ("[%s] monitor waited event triggered", 2485 JvmtiTrace::safe_get_thread_name(thread))); 2486 2487 JvmtiEnvThreadStateIterator it(state); 2488 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2489 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2490 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2491 ("[%s] monitor waited event sent", 2492 JvmtiTrace::safe_get_thread_name(thread))); 2493 JvmtiMonitorEventMark jem(thread, h()); 2494 JvmtiEnv *env = ets->get_env(); 2495 JvmtiThreadEventTransition jet(thread); 2496 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2497 if (callback != NULL) { 2498 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2499 jem.jni_object(), timed_out); 2500 } 2501 } 2502 } 2503 } 2504 2505 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2506 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered", 2507 JvmtiTrace::safe_get_thread_name(thread))); 2508 if (object == NULL) { 2509 return; 2510 } 2511 HandleMark hm(thread); 2512 Handle h(thread, object); 2513 JvmtiEnvIterator it; 2514 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2515 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2516 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s", 2517 JvmtiTrace::safe_get_thread_name(thread), 2518 object==NULL? "NULL" : object->klass()->external_name())); 2519 2520 JvmtiObjectAllocEventMark jem(thread, h()); 2521 JvmtiJavaThreadEventTransition jet(thread); 2522 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2523 if (callback != NULL) { 2524 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2525 jem.jni_jobject(), jem.jni_class(), jem.size()); 2526 } 2527 } 2528 } 2529 } 2530 2531 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) { 2532 JvmtiThreadState *state = thread->jvmti_thread_state(); 2533 if (state == NULL) { 2534 return; 2535 } 2536 2537 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2538 ("[%s] Trg sampled object alloc triggered", 2539 JvmtiTrace::safe_get_thread_name(thread))); 2540 if (object == NULL) { 2541 return; 2542 } 2543 HandleMark hm(thread); 2544 Handle h(thread, object); 2545 2546 JvmtiEnvThreadStateIterator it(state); 2547 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2548 if (ets->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) { 2549 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2550 ("[%s] Evt sampled object alloc sent %s", 2551 JvmtiTrace::safe_get_thread_name(thread), 2552 object == NULL ? "NULL" : object->klass()->external_name())); 2553 2554 JvmtiEnv *env = ets->get_env(); 2555 JvmtiObjectAllocEventMark jem(thread, h()); 2556 JvmtiJavaThreadEventTransition jet(thread); 2557 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc; 2558 if (callback != NULL) { 2559 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2560 jem.jni_jobject(), jem.jni_class(), jem.size()); 2561 } 2562 } 2563 } 2564 } 2565 2566 //////////////////////////////////////////////////////////////////////////////////////////////// 2567 2568 void JvmtiExport::cleanup_thread(JavaThread* thread) { 2569 assert(JavaThread::current() == thread, "thread is not current"); 2570 MutexLocker mu(thread, JvmtiThreadState_lock); 2571 2572 if (thread->jvmti_thread_state() != NULL) { 2573 // This has to happen after the thread state is removed, which is 2574 // why it is not in post_thread_end_event like its complement 2575 // Maybe both these functions should be rolled into the posts? 2576 JvmtiEventController::thread_ended(thread); 2577 } 2578 } 2579 2580 void JvmtiExport::clear_detected_exception(JavaThread* thread) { 2581 assert(JavaThread::current() == thread, "thread is not current"); 2582 2583 JvmtiThreadState* state = thread->jvmti_thread_state(); 2584 if (state != NULL) { 2585 state->clear_exception_state(); 2586 } 2587 } 2588 2589 // Onload raw monitor transition. 2590 void JvmtiExport::transition_pending_onload_raw_monitors() { 2591 JvmtiPendingMonitors::transition_raw_monitors(); 2592 } 2593 2594 //////////////////////////////////////////////////////////////////////////////////////////////// 2595 #if INCLUDE_SERVICES 2596 // Attach is disabled if SERVICES is not included 2597 2598 // type for the Agent_OnAttach entry point 2599 extern "C" { 2600 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2601 } 2602 2603 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam, 2604 const char *options, outputStream* st) { 2605 char ebuf[1024] = {0}; 2606 char buffer[JVM_MAXPATHLEN]; 2607 void* library = NULL; 2608 jint result = JNI_ERR; 2609 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2610 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols); 2611 2612 // The abs paramter should be "true" or "false" 2613 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2614 2615 // Initially marked as invalid. It will be set to valid if we can find the agent 2616 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL); 2617 2618 // Check for statically linked in agent. If not found then if the path is 2619 // absolute we attempt to load the library. Otherwise we try to load it 2620 // from the standard dll directory. 2621 2622 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) { 2623 if (is_absolute_path) { 2624 library = os::dll_load(agent, ebuf, sizeof ebuf); 2625 } else { 2626 // Try to load the agent from the standard dll directory 2627 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(), 2628 agent)) { 2629 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2630 } 2631 if (library == NULL) { 2632 // not found - try OS default library path 2633 if (os::dll_build_name(buffer, sizeof(buffer), agent)) { 2634 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2635 } 2636 } 2637 } 2638 if (library != NULL) { 2639 agent_lib->set_os_lib(library); 2640 agent_lib->set_valid(); 2641 } 2642 } 2643 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2644 // function 2645 if (agent_lib->valid()) { 2646 // Lookup the Agent_OnAttach function 2647 OnAttachEntry_t on_attach_entry = NULL; 2648 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, 2649 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries)); 2650 if (on_attach_entry == NULL) { 2651 // Agent_OnAttach missing - unload library 2652 if (!agent_lib->is_static_lib()) { 2653 os::dll_unload(library); 2654 } 2655 st->print_cr("%s is not available in %s", 2656 on_attach_symbols[0], agent_lib->name()); 2657 delete agent_lib; 2658 } else { 2659 // Invoke the Agent_OnAttach function 2660 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2661 { 2662 extern struct JavaVM_ main_vm; 2663 JvmtiThreadEventMark jem(THREAD); 2664 JvmtiJavaThreadEventTransition jet(THREAD); 2665 2666 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2667 } 2668 2669 // Agent_OnAttach may have used JNI 2670 if (HAS_PENDING_EXCEPTION) { 2671 CLEAR_PENDING_EXCEPTION; 2672 } 2673 2674 // If OnAttach returns JNI_OK then we add it to the list of 2675 // agent libraries so that we can call Agent_OnUnload later. 2676 if (result == JNI_OK) { 2677 Arguments::add_loaded_agent(agent_lib); 2678 } else { 2679 if (!agent_lib->is_static_lib()) { 2680 os::dll_unload(library); 2681 } 2682 delete agent_lib; 2683 } 2684 2685 // Agent_OnAttach executed so completion status is JNI_OK 2686 st->print_cr("return code: %d", result); 2687 result = JNI_OK; 2688 } 2689 } else { 2690 st->print_cr("%s was not loaded.", agent); 2691 if (*ebuf != '\0') { 2692 st->print_cr("%s", ebuf); 2693 } 2694 } 2695 return result; 2696 } 2697 2698 #endif // INCLUDE_SERVICES 2699 //////////////////////////////////////////////////////////////////////////////////////////////// 2700 2701 // Setup current current thread for event collection. 2702 void JvmtiEventCollector::setup_jvmti_thread_state() { 2703 // set this event collector to be the current one. 2704 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2705 // state can only be NULL if the current thread is exiting which 2706 // should not happen since we're trying to configure for event collection 2707 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2708 if (is_vm_object_alloc_event()) { 2709 JvmtiVMObjectAllocEventCollector *prev = state->get_vm_object_alloc_event_collector(); 2710 2711 // If we have a previous collector and it is disabled, it means this allocation came from a 2712 // callback induced VM Object allocation, do not register this collector then. 2713 if (prev && !prev->is_enabled()) { 2714 return; 2715 } 2716 _prev = prev; 2717 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2718 } else if (is_dynamic_code_event()) { 2719 _prev = state->get_dynamic_code_event_collector(); 2720 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2721 } else if (is_sampled_object_alloc_event()) { 2722 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector(); 2723 2724 if (prev) { 2725 // JvmtiSampledObjectAllocEventCollector wants only one active collector 2726 // enabled. This allows to have a collector detect a user code requiring 2727 // a sample in the callback. 2728 return; 2729 } 2730 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this); 2731 } 2732 2733 _unset_jvmti_thread_state = true; 2734 } 2735 2736 // Unset current event collection in this thread and reset it with previous 2737 // collector. 2738 void JvmtiEventCollector::unset_jvmti_thread_state() { 2739 if (!_unset_jvmti_thread_state) { 2740 return; 2741 } 2742 2743 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2744 if (state != NULL) { 2745 // restore the previous event collector (if any) 2746 if (is_vm_object_alloc_event()) { 2747 if (state->get_vm_object_alloc_event_collector() == this) { 2748 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2749 } else { 2750 // this thread's jvmti state was created during the scope of 2751 // the event collector. 2752 } 2753 } else if (is_dynamic_code_event()) { 2754 if (state->get_dynamic_code_event_collector() == this) { 2755 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2756 } else { 2757 // this thread's jvmti state was created during the scope of 2758 // the event collector. 2759 } 2760 } else if (is_sampled_object_alloc_event()) { 2761 if (state->get_sampled_object_alloc_event_collector() == this) { 2762 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev); 2763 } else { 2764 // this thread's jvmti state was created during the scope of 2765 // the event collector. 2766 } 2767 } 2768 } 2769 } 2770 2771 // create the dynamic code event collector 2772 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2773 if (JvmtiExport::should_post_dynamic_code_generated()) { 2774 setup_jvmti_thread_state(); 2775 } 2776 } 2777 2778 // iterate over any code blob descriptors collected and post a 2779 // DYNAMIC_CODE_GENERATED event to the profiler. 2780 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2781 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2782 // iterate over any code blob descriptors that we collected 2783 if (_code_blobs != NULL) { 2784 for (int i=0; i<_code_blobs->length(); i++) { 2785 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2786 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2787 FreeHeap(blob); 2788 } 2789 delete _code_blobs; 2790 } 2791 unset_jvmti_thread_state(); 2792 } 2793 2794 // register a stub 2795 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2796 if (_code_blobs == NULL) { 2797 _code_blobs = new (ResourceObj::C_HEAP, mtServiceability) GrowableArray<JvmtiCodeBlobDesc*>(1, mtServiceability); 2798 } 2799 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2800 } 2801 2802 // Setup current thread to record vm allocated objects. 2803 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() : 2804 _allocated(NULL), _enable(false), _post_callback(NULL) { 2805 } 2806 2807 // Post vm_object_alloc event for vm allocated objects visible to java 2808 // world. 2809 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() { 2810 if (_allocated) { 2811 set_enabled(false); 2812 for (int i = 0; i < _allocated->length(); i++) { 2813 oop obj = _allocated->at(i).resolve(); 2814 _post_callback(JavaThread::current(), obj); 2815 // Release OopHandle 2816 _allocated->at(i).release(JvmtiExport::jvmti_oop_storage()); 2817 2818 } 2819 delete _allocated, _allocated = NULL; 2820 } 2821 } 2822 2823 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) { 2824 assert(is_enabled(), "Object alloc event collector is not enabled"); 2825 if (_allocated == NULL) { 2826 _allocated = new (ResourceObj::C_HEAP, mtServiceability) GrowableArray<OopHandle>(1, mtServiceability); 2827 } 2828 _allocated->push(OopHandle(JvmtiExport::jvmti_oop_storage(), obj)); 2829 } 2830 2831 // Disable collection of VMObjectAlloc events 2832 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2833 // a no-op if VMObjectAlloc event is not enabled 2834 if (!JvmtiExport::should_post_vm_object_alloc()) { 2835 return; 2836 } 2837 Thread* thread = Thread::current_or_null(); 2838 if (thread != NULL && thread->is_Java_thread()) { 2839 JavaThread* current_thread = JavaThread::cast(thread); 2840 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2841 if (state != NULL) { 2842 JvmtiVMObjectAllocEventCollector *collector; 2843 collector = state->get_vm_object_alloc_event_collector(); 2844 if (collector != NULL && collector->is_enabled()) { 2845 _collector = collector; 2846 _collector->set_enabled(false); 2847 } 2848 } 2849 } 2850 } 2851 2852 // Re-Enable collection of VMObjectAlloc events (if previously enabled) 2853 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2854 if (was_enabled()) { 2855 _collector->set_enabled(true); 2856 } 2857 }; 2858 2859 // Setup current thread to record vm allocated objects. 2860 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() { 2861 if (JvmtiExport::should_post_vm_object_alloc()) { 2862 _enable = true; 2863 setup_jvmti_thread_state(); 2864 _post_callback = JvmtiExport::post_vm_object_alloc; 2865 } 2866 } 2867 2868 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2869 if (_enable) { 2870 generate_call_for_allocated(); 2871 } 2872 unset_jvmti_thread_state(); 2873 } 2874 2875 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() { 2876 Thread* thread = Thread::current(); 2877 // Really only sample allocations if this is a JavaThread and not the compiler 2878 // thread. 2879 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) { 2880 return false; 2881 } 2882 2883 if (MultiArray_lock->owner() == thread) { 2884 return false; 2885 } 2886 return true; 2887 } 2888 2889 // Setup current thread to record sampled allocated objects. 2890 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() { 2891 if (JvmtiExport::should_post_sampled_object_alloc()) { 2892 if (!object_alloc_is_safe_to_sample()) { 2893 return; 2894 } 2895 2896 _enable = true; 2897 setup_jvmti_thread_state(); 2898 _post_callback = JvmtiExport::post_sampled_object_alloc; 2899 } 2900 } 2901 2902 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() { 2903 if (!_enable) { 2904 return; 2905 } 2906 2907 generate_call_for_allocated(); 2908 unset_jvmti_thread_state(); 2909 2910 // Unset the sampling collector as present in assertion mode only. 2911 assert(Thread::current()->is_Java_thread(), 2912 "Should always be in a Java thread"); 2913 } 2914 2915 JvmtiGCMarker::JvmtiGCMarker() { 2916 // if there aren't any JVMTI environments then nothing to do 2917 if (!JvmtiEnv::environments_might_exist()) { 2918 return; 2919 } 2920 2921 if (JvmtiExport::should_post_garbage_collection_start()) { 2922 JvmtiExport::post_garbage_collection_start(); 2923 } 2924 2925 if (SafepointSynchronize::is_at_safepoint()) { 2926 // Do clean up tasks that need to be done at a safepoint 2927 JvmtiEnvBase::check_for_periodic_clean_up(); 2928 } 2929 } 2930 2931 JvmtiGCMarker::~JvmtiGCMarker() { 2932 // if there aren't any JVMTI environments then nothing to do 2933 if (!JvmtiEnv::environments_might_exist()) { 2934 return; 2935 } 2936 2937 // JVMTI notify gc finish 2938 if (JvmtiExport::should_post_garbage_collection_finish()) { 2939 JvmtiExport::post_garbage_collection_finish(); 2940 } 2941 }