1 /* 2 * Copyright (c) 2003, 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/javaClasses.inline.hpp" 27 #include "classfile/moduleEntry.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "code/nmethod.hpp" 30 #include "code/pcDesc.hpp" 31 #include "code/scopeDesc.hpp" 32 #include "gc/shared/oopStorageSet.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "jvmtifiles/jvmtiEnv.hpp" 35 #include "logging/log.hpp" 36 #include "logging/logStream.hpp" 37 #include "memory/allocation.inline.hpp" 38 #include "memory/resourceArea.hpp" 39 #include "memory/universe.hpp" 40 #include "oops/objArrayKlass.hpp" 41 #include "oops/objArrayOop.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/oopHandle.inline.hpp" 44 #include "prims/jvmtiCodeBlobEvents.hpp" 45 #include "prims/jvmtiEventController.hpp" 46 #include "prims/jvmtiEventController.inline.hpp" 47 #include "prims/jvmtiExport.hpp" 48 #include "prims/jvmtiImpl.hpp" 49 #include "prims/jvmtiManageCapabilities.hpp" 50 #include "prims/jvmtiRawMonitor.hpp" 51 #include "prims/jvmtiRedefineClasses.hpp" 52 #include "prims/jvmtiTagMap.hpp" 53 #include "prims/jvmtiThreadState.inline.hpp" 54 #include "runtime/arguments.hpp" 55 #include "runtime/fieldDescriptor.inline.hpp" 56 #include "runtime/handles.inline.hpp" 57 #include "runtime/interfaceSupport.inline.hpp" 58 #include "runtime/javaCalls.hpp" 59 #include "runtime/jniHandles.inline.hpp" 60 #include "runtime/objectMonitor.hpp" 61 #include "runtime/objectMonitor.inline.hpp" 62 #include "runtime/os.inline.hpp" 63 #include "runtime/safepointVerifiers.hpp" 64 #include "runtime/serviceThread.hpp" 65 #include "runtime/thread.inline.hpp" 66 #include "runtime/threadSMR.hpp" 67 #include "runtime/vframe.inline.hpp" 68 #include "utilities/macros.hpp" 69 70 #ifdef JVMTI_TRACE 71 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 72 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 73 #else 74 #define EVT_TRIG_TRACE(evt,out) 75 #define EVT_TRACE(evt,out) 76 #endif 77 78 /////////////////////////////////////////////////////////////// 79 // 80 // JvmtiEventTransition 81 // 82 // TO DO -- 83 // more handle purging 84 85 // Use this for JavaThreads and state is _thread_in_vm. 86 class JvmtiJavaThreadEventTransition : StackObj { 87 private: 88 ResourceMark _rm; 89 ThreadToNativeFromVM _transition; 90 HandleMark _hm; 91 92 public: 93 JvmtiJavaThreadEventTransition(JavaThread *thread) : 94 _rm(), 95 _transition(thread), 96 _hm(thread) {}; 97 }; 98 99 // For JavaThreads which are not in _thread_in_vm state 100 // and other system threads use this. 101 class JvmtiThreadEventTransition : StackObj { 102 private: 103 ResourceMark _rm; 104 HandleMark _hm; 105 JavaThreadState _saved_state; 106 JavaThread *_jthread; 107 108 public: 109 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm(thread) { 110 if (thread->is_Java_thread()) { 111 _jthread = (JavaThread *)thread; 112 _saved_state = _jthread->thread_state(); 113 if (_saved_state == _thread_in_Java) { 114 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 115 } else { 116 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 117 } 118 } else { 119 _jthread = NULL; 120 } 121 } 122 123 ~JvmtiThreadEventTransition() { 124 if (_jthread != NULL) 125 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 126 } 127 }; 128 129 130 /////////////////////////////////////////////////////////////// 131 // 132 // JvmtiEventMark 133 // 134 135 class JvmtiEventMark : public StackObj { 136 private: 137 JavaThread *_thread; 138 JNIEnv* _jni_env; 139 JvmtiThreadState::ExceptionState _saved_exception_state; 140 #if 0 141 JNIHandleBlock* _hblock; 142 #endif 143 144 public: 145 JvmtiEventMark(JavaThread *thread) : _thread(thread), 146 _jni_env(thread->jni_environment()), 147 _saved_exception_state(JvmtiThreadState::ES_CLEARED) { 148 #if 0 149 _hblock = thread->active_handles(); 150 _hblock->clear_thoroughly(); // so we can be safe 151 #else 152 // we want to use the code above - but that needs the JNIHandle changes - later... 153 // for now, steal JNI push local frame code 154 JvmtiThreadState *state = thread->jvmti_thread_state(); 155 // we are before an event. 156 // Save current jvmti thread exception state. 157 if (state != NULL) { 158 _saved_exception_state = state->get_exception_state(); 159 } 160 161 JNIHandleBlock* old_handles = thread->active_handles(); 162 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 163 assert(new_handles != NULL, "should not be NULL"); 164 new_handles->set_pop_frame_link(old_handles); 165 thread->set_active_handles(new_handles); 166 #endif 167 assert(thread == JavaThread::current(), "thread must be current!"); 168 thread->frame_anchor()->make_walkable(thread); 169 }; 170 171 ~JvmtiEventMark() { 172 #if 0 173 _hblock->clear(); // for consistency with future correct behavior 174 #else 175 // we want to use the code above - but that needs the JNIHandle changes - later... 176 // for now, steal JNI pop local frame code 177 JNIHandleBlock* old_handles = _thread->active_handles(); 178 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 179 assert(new_handles != NULL, "should not be NULL"); 180 _thread->set_active_handles(new_handles); 181 // Note that we set the pop_frame_link to NULL explicitly, otherwise 182 // the release_block call will release the blocks. 183 old_handles->set_pop_frame_link(NULL); 184 JNIHandleBlock::release_block(old_handles, _thread); // may block 185 #endif 186 187 JvmtiThreadState* state = _thread->jvmti_thread_state(); 188 // we are continuing after an event. 189 if (state != NULL) { 190 // Restore the jvmti thread exception state. 191 state->restore_exception_state(_saved_exception_state); 192 } 193 } 194 195 #if 0 196 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 197 #else 198 // we want to use the code above - but that needs the JNIHandle changes - later... 199 // for now, use regular make_local 200 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 201 #endif 202 203 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); } 204 205 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); } 206 207 JNIEnv* jni_env() { return _jni_env; } 208 }; 209 210 class JvmtiThreadEventMark : public JvmtiEventMark { 211 private: 212 jthread _jt; 213 214 public: 215 JvmtiThreadEventMark(JavaThread *thread) : 216 JvmtiEventMark(thread) { 217 _jt = (jthread)(to_jobject(thread->threadObj())); 218 }; 219 jthread jni_thread() { return _jt; } 220 }; 221 222 class JvmtiClassEventMark : public JvmtiThreadEventMark { 223 private: 224 jclass _jc; 225 226 public: 227 JvmtiClassEventMark(JavaThread *thread, Klass* klass) : 228 JvmtiThreadEventMark(thread) { 229 _jc = to_jclass(klass); 230 }; 231 jclass jni_class() { return _jc; } 232 }; 233 234 class JvmtiMethodEventMark : public JvmtiThreadEventMark { 235 private: 236 jmethodID _mid; 237 238 public: 239 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) : 240 JvmtiThreadEventMark(thread), 241 _mid(to_jmethodID(method)) {}; 242 jmethodID jni_methodID() { return _mid; } 243 }; 244 245 class JvmtiLocationEventMark : public JvmtiMethodEventMark { 246 private: 247 jlocation _loc; 248 249 public: 250 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) : 251 JvmtiMethodEventMark(thread, method), 252 _loc(location - method->code_base()) {}; 253 jlocation location() { return _loc; } 254 }; 255 256 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 257 private: 258 jobject _exc; 259 260 public: 261 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) : 262 JvmtiLocationEventMark(thread, method, location), 263 _exc(to_jobject(exception())) {}; 264 jobject exception() { return _exc; } 265 }; 266 267 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 268 private: 269 const char *_class_name; 270 jobject _jloader; 271 jobject _protection_domain; 272 jclass _class_being_redefined; 273 274 public: 275 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 276 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) { 277 _class_name = name != NULL? name->as_utf8() : NULL; 278 _jloader = (jobject)to_jobject(class_loader()); 279 _protection_domain = (jobject)to_jobject(prot_domain()); 280 if (class_being_redefined == NULL) { 281 _class_being_redefined = NULL; 282 } else { 283 _class_being_redefined = (jclass)to_jclass(class_being_redefined); 284 } 285 }; 286 const char *class_name() { 287 return _class_name; 288 } 289 jobject jloader() { 290 return _jloader; 291 } 292 jobject protection_domain() { 293 return _protection_domain; 294 } 295 jclass class_being_redefined() { 296 return _class_being_redefined; 297 } 298 }; 299 300 ////////////////////////////////////////////////////////////////////////////// 301 302 int JvmtiExport::_field_access_count = 0; 303 int JvmtiExport::_field_modification_count = 0; 304 305 bool JvmtiExport::_can_access_local_variables = false; 306 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 307 bool JvmtiExport::_can_modify_any_class = false; 308 bool JvmtiExport::_can_walk_any_space = false; 309 310 uint64_t JvmtiExport::_redefinition_count = 0; 311 bool JvmtiExport::_all_dependencies_are_recorded = false; 312 313 // 314 // field access management 315 // 316 317 // interpreter generator needs the address of the counter 318 address JvmtiExport::get_field_access_count_addr() { 319 // We don't grab a lock because we don't want to 320 // serialize field access between all threads. This means that a 321 // thread on another processor can see the wrong count value and 322 // may either miss making a needed call into post_field_access() 323 // or will make an unneeded call into post_field_access(). We pay 324 // this price to avoid slowing down the VM when we aren't watching 325 // field accesses. 326 // Other access/mutation safe by virtue of being in VM state. 327 return (address)(&_field_access_count); 328 } 329 330 // 331 // field modification management 332 // 333 334 // interpreter generator needs the address of the counter 335 address JvmtiExport::get_field_modification_count_addr() { 336 // We don't grab a lock because we don't 337 // want to serialize field modification between all threads. This 338 // means that a thread on another processor can see the wrong 339 // count value and may either miss making a needed call into 340 // post_field_modification() or will make an unneeded call into 341 // post_field_modification(). We pay this price to avoid slowing 342 // down the VM when we aren't watching field modifications. 343 // Other access/mutation safe by virtue of being in VM state. 344 return (address)(&_field_modification_count); 345 } 346 347 348 /////////////////////////////////////////////////////////////// 349 // Functions needed by java.lang.instrument for starting up javaagent. 350 /////////////////////////////////////////////////////////////// 351 352 jint 353 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 354 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 355 // has already been validated in JNI GetEnv(). 356 int major, minor, micro; 357 358 // micro version doesn't matter here (yet?) 359 decode_version_values(version, &major, &minor, µ); 360 switch (major) { 361 case 1: 362 switch (minor) { 363 case 0: // version 1.0.<micro> is recognized 364 case 1: // version 1.1.<micro> is recognized 365 case 2: // version 1.2.<micro> is recognized 366 break; 367 368 default: 369 return JNI_EVERSION; // unsupported minor version number 370 } 371 break; 372 case 9: 373 switch (minor) { 374 case 0: // version 9.0.<micro> is recognized 375 break; 376 default: 377 return JNI_EVERSION; // unsupported minor version number 378 } 379 break; 380 case 11: 381 switch (minor) { 382 case 0: // version 11.0.<micro> is recognized 383 break; 384 default: 385 return JNI_EVERSION; // unsupported minor version number 386 } 387 break; 388 default: 389 // Starting from 13 we do not care about minor version anymore 390 if (major < 13 || major > Abstract_VM_Version::vm_major_version()) { 391 return JNI_EVERSION; // unsupported major version number 392 } 393 } 394 395 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 396 JavaThread* current_thread = JavaThread::current(); 397 // transition code: native to VM 398 ThreadInVMfromNative __tiv(current_thread); 399 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 400 debug_only(VMNativeEntryWrapper __vew;) 401 402 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 403 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 404 return JNI_OK; 405 406 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 407 // not live, no thread to transition 408 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 409 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 410 return JNI_OK; 411 412 } else { 413 // Called at the wrong time 414 *penv = NULL; 415 return JNI_EDETACHED; 416 } 417 } 418 419 void 420 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) { 421 if (!Universe::is_module_initialized()) { 422 return; // extra safety 423 } 424 assert(!h_module.is_null(), "module should always be set"); 425 426 // Invoke the transformedByAgent method 427 JavaValue result(T_VOID); 428 JavaCalls::call_static(&result, 429 SystemDictionary::module_Modules_klass(), 430 vmSymbols::transformedByAgent_name(), 431 vmSymbols::transformedByAgent_signature(), 432 h_module, 433 THREAD); 434 435 if (HAS_PENDING_EXCEPTION) { 436 LogTarget(Trace, jvmti) log; 437 LogStream log_stream(log); 438 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 439 log_stream.cr(); 440 CLEAR_PENDING_EXCEPTION; 441 return; 442 } 443 } 444 445 jvmtiError 446 JvmtiExport::add_module_reads(Handle module, 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"); 452 453 // Invoke the addReads method 454 JavaValue result(T_VOID); 455 JavaCalls::call_static(&result, 456 SystemDictionary::module_Modules_klass(), 457 vmSymbols::addReads_name(), 458 vmSymbols::addReads_signature(), 459 module, 460 to_module, 461 THREAD); 462 463 if (HAS_PENDING_EXCEPTION) { 464 LogTarget(Trace, jvmti) log; 465 LogStream log_stream(log); 466 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 467 log_stream.cr(); 468 CLEAR_PENDING_EXCEPTION; 469 return JVMTI_ERROR_INTERNAL; 470 } 471 return JVMTI_ERROR_NONE; 472 } 473 474 jvmtiError 475 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 476 if (!Universe::is_module_initialized()) { 477 return JVMTI_ERROR_NONE; // extra safety 478 } 479 assert(!module.is_null(), "module should always be set"); 480 assert(!to_module.is_null(), "to_module should always be set"); 481 assert(!pkg_name.is_null(), "pkg_name should always be set"); 482 483 // Invoke the addExports method 484 JavaValue result(T_VOID); 485 JavaCalls::call_static(&result, 486 SystemDictionary::module_Modules_klass(), 487 vmSymbols::addExports_name(), 488 vmSymbols::addExports_signature(), 489 module, 490 pkg_name, 491 to_module, 492 THREAD); 493 494 if (HAS_PENDING_EXCEPTION) { 495 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 496 LogTarget(Trace, jvmti) log; 497 LogStream log_stream(log); 498 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 499 log_stream.cr(); 500 CLEAR_PENDING_EXCEPTION; 501 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 502 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 503 } 504 return JVMTI_ERROR_INTERNAL; 505 } 506 return JVMTI_ERROR_NONE; 507 } 508 509 jvmtiError 510 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 511 if (!Universe::is_module_initialized()) { 512 return JVMTI_ERROR_NONE; // extra safety 513 } 514 assert(!module.is_null(), "module should always be set"); 515 assert(!to_module.is_null(), "to_module should always be set"); 516 assert(!pkg_name.is_null(), "pkg_name should always be set"); 517 518 // Invoke the addOpens method 519 JavaValue result(T_VOID); 520 JavaCalls::call_static(&result, 521 SystemDictionary::module_Modules_klass(), 522 vmSymbols::addOpens_name(), 523 vmSymbols::addExports_signature(), 524 module, 525 pkg_name, 526 to_module, 527 THREAD); 528 529 if (HAS_PENDING_EXCEPTION) { 530 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 531 LogTarget(Trace, jvmti) log; 532 LogStream log_stream(log); 533 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 534 log_stream.cr(); 535 CLEAR_PENDING_EXCEPTION; 536 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 537 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 538 } 539 return JVMTI_ERROR_INTERNAL; 540 } 541 return JVMTI_ERROR_NONE; 542 } 543 544 jvmtiError 545 JvmtiExport::add_module_uses(Handle module, Handle service, 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"); 551 552 // Invoke the addUses method 553 JavaValue result(T_VOID); 554 JavaCalls::call_static(&result, 555 SystemDictionary::module_Modules_klass(), 556 vmSymbols::addUses_name(), 557 vmSymbols::addUses_signature(), 558 module, 559 service, 560 THREAD); 561 562 if (HAS_PENDING_EXCEPTION) { 563 LogTarget(Trace, jvmti) log; 564 LogStream log_stream(log); 565 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 566 log_stream.cr(); 567 CLEAR_PENDING_EXCEPTION; 568 return JVMTI_ERROR_INTERNAL; 569 } 570 return JVMTI_ERROR_NONE; 571 } 572 573 jvmtiError 574 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) { 575 if (!Universe::is_module_initialized()) { 576 return JVMTI_ERROR_NONE; // extra safety 577 } 578 assert(!module.is_null(), "module should always be set"); 579 assert(!service.is_null(), "service should always be set"); 580 assert(!impl_class.is_null(), "impl_class should always be set"); 581 582 // Invoke the addProvides method 583 JavaValue result(T_VOID); 584 JavaCalls::call_static(&result, 585 SystemDictionary::module_Modules_klass(), 586 vmSymbols::addProvides_name(), 587 vmSymbols::addProvides_signature(), 588 module, 589 service, 590 impl_class, 591 THREAD); 592 593 if (HAS_PENDING_EXCEPTION) { 594 LogTarget(Trace, jvmti) log; 595 LogStream log_stream(log); 596 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 597 log_stream.cr(); 598 CLEAR_PENDING_EXCEPTION; 599 return JVMTI_ERROR_INTERNAL; 600 } 601 return JVMTI_ERROR_NONE; 602 } 603 604 void 605 JvmtiExport::decode_version_values(jint version, int * major, int * minor, 606 int * micro) { 607 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 608 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 609 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 610 } 611 612 void JvmtiExport::enter_primordial_phase() { 613 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 614 } 615 616 void JvmtiExport::enter_early_start_phase() { 617 set_early_vmstart_recorded(true); 618 } 619 620 void JvmtiExport::enter_start_phase() { 621 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 622 } 623 624 void JvmtiExport::enter_onload_phase() { 625 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 626 } 627 628 void JvmtiExport::enter_live_phase() { 629 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 630 } 631 632 // 633 // JVMTI events that the VM posts to the debugger and also startup agent 634 // and call the agent's premain() for java.lang.instrument. 635 // 636 637 void JvmtiExport::post_early_vm_start() { 638 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" )); 639 640 // can now enable some events 641 JvmtiEventController::vm_start(); 642 643 JvmtiEnvIterator it; 644 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 645 // Only early vmstart envs post early VMStart event 646 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 647 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" )); 648 JavaThread *thread = JavaThread::current(); 649 JvmtiThreadEventMark jem(thread); 650 JvmtiJavaThreadEventTransition jet(thread); 651 jvmtiEventVMStart callback = env->callbacks()->VMStart; 652 if (callback != NULL) { 653 (*callback)(env->jvmti_external(), jem.jni_env()); 654 } 655 } 656 } 657 } 658 659 void JvmtiExport::post_vm_start() { 660 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" )); 661 662 // can now enable some events 663 JvmtiEventController::vm_start(); 664 665 JvmtiEnvIterator it; 666 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 667 // Early vmstart envs do not post normal VMStart event 668 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 669 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" )); 670 671 JavaThread *thread = JavaThread::current(); 672 JvmtiThreadEventMark jem(thread); 673 JvmtiJavaThreadEventTransition jet(thread); 674 jvmtiEventVMStart callback = env->callbacks()->VMStart; 675 if (callback != NULL) { 676 (*callback)(env->jvmti_external(), jem.jni_env()); 677 } 678 } 679 } 680 } 681 682 static OopStorage* _jvmti_oop_storage = NULL; 683 684 OopStorage* JvmtiExport::jvmti_oop_storage() { 685 assert(_jvmti_oop_storage != NULL, "not yet initialized"); 686 return _jvmti_oop_storage; 687 } 688 689 void JvmtiExport::initialize_oop_storage() { 690 // OopStorage needs to be created early in startup and unconditionally 691 // because of OopStorageSet static array indices. 692 _jvmti_oop_storage = OopStorageSet::create_strong("JVMTI OopStorage"); 693 } 694 695 void JvmtiExport::post_vm_initialized() { 696 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" )); 697 698 // can now enable events 699 JvmtiEventController::vm_init(); 700 701 JvmtiEnvIterator it; 702 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 703 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 704 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" )); 705 706 JavaThread *thread = JavaThread::current(); 707 JvmtiThreadEventMark jem(thread); 708 JvmtiJavaThreadEventTransition jet(thread); 709 jvmtiEventVMInit callback = env->callbacks()->VMInit; 710 if (callback != NULL) { 711 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 712 } 713 } 714 } 715 } 716 717 718 void JvmtiExport::post_vm_death() { 719 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" )); 720 721 JvmtiEnvIterator it; 722 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 723 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 724 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" )); 725 726 JavaThread *thread = JavaThread::current(); 727 JvmtiEventMark jem(thread); 728 JvmtiJavaThreadEventTransition jet(thread); 729 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 730 if (callback != NULL) { 731 (*callback)(env->jvmti_external(), jem.jni_env()); 732 } 733 } 734 } 735 736 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 737 JvmtiEventController::vm_death(); 738 } 739 740 char** 741 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 742 // Have to grab JVMTI thread state lock to be sure environment doesn't 743 // go away while we iterate them. No locks during VM bring-up. 744 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 745 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 746 } else { 747 MutexLocker mu(JvmtiThreadState_lock); 748 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 749 } 750 } 751 752 // Convert an external thread reference to a JavaThread found on the 753 // specified ThreadsList. The ThreadsListHandle in the caller "protects" 754 // the returned JavaThread *. 755 // 756 // If thread_oop_p is not NULL, then the caller wants to use the oop 757 // after this call so the oop is returned. On success, *jt_pp is set 758 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned. 759 // On error, returns various JVMTI_ERROR_* values. 760 // 761 jvmtiError 762 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list, 763 jthread thread, 764 JavaThread ** jt_pp, 765 oop * thread_oop_p) { 766 assert(t_list != NULL, "must have a ThreadsList"); 767 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 768 // thread_oop_p is optional so no assert() 769 770 oop thread_oop = JNIHandles::resolve_external_guard(thread); 771 if (thread_oop == NULL) { 772 // NULL jthread, GC'ed jthread or a bad JNI handle. 773 return JVMTI_ERROR_INVALID_THREAD; 774 } 775 // Looks like an oop at this point. 776 777 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 778 // The oop is not a java.lang.Thread. 779 return JVMTI_ERROR_INVALID_THREAD; 780 } 781 // Looks like a java.lang.Thread oop at this point. 782 783 if (thread_oop_p != NULL) { 784 // Return the oop to the caller; the caller may still want 785 // the oop even if this function returns an error. 786 *thread_oop_p = thread_oop; 787 } 788 789 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 790 if (java_thread == NULL) { 791 // The java.lang.Thread does not contain a JavaThread * so it has 792 // not yet run or it has died. 793 return JVMTI_ERROR_THREAD_NOT_ALIVE; 794 } 795 // Looks like a live JavaThread at this point. 796 797 // We do not check the EnableThreadSMRExtraValidityChecks option 798 // for this includes() call because JVM/TI's spec is tighter. 799 if (!t_list->includes(java_thread)) { 800 // Not on the JavaThreads list so it is not alive. 801 return JVMTI_ERROR_THREAD_NOT_ALIVE; 802 } 803 804 // Return a live JavaThread that is "protected" by the 805 // ThreadsListHandle in the caller. 806 *jt_pp = java_thread; 807 808 return JVMTI_ERROR_NONE; 809 } 810 811 // Convert an oop to a JavaThread found on the specified ThreadsList. 812 // The ThreadsListHandle in the caller "protects" the returned 813 // JavaThread *. 814 // 815 // On success, *jt_pp is set to the converted JavaThread * and 816 // JVMTI_ERROR_NONE is returned. On error, returns various 817 // JVMTI_ERROR_* values. 818 // 819 jvmtiError 820 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop, 821 JavaThread ** jt_pp) { 822 assert(t_list != NULL, "must have a ThreadsList"); 823 assert(thread_oop != NULL, "must have an oop"); 824 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 825 826 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 827 // The oop is not a java.lang.Thread. 828 return JVMTI_ERROR_INVALID_THREAD; 829 } 830 // Looks like a java.lang.Thread oop at this point. 831 832 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 833 if (java_thread == NULL) { 834 // The java.lang.Thread does not contain a JavaThread * so it has 835 // not yet run or it has died. 836 return JVMTI_ERROR_THREAD_NOT_ALIVE; 837 } 838 // Looks like a live JavaThread at this point. 839 840 // We do not check the EnableThreadSMRExtraValidityChecks option 841 // for this includes() call because JVM/TI's spec is tighter. 842 if (!t_list->includes(java_thread)) { 843 // Not on the JavaThreads list so it is not alive. 844 return JVMTI_ERROR_THREAD_NOT_ALIVE; 845 } 846 847 // Return a live JavaThread that is "protected" by the 848 // ThreadsListHandle in the caller. 849 *jt_pp = java_thread; 850 851 return JVMTI_ERROR_NONE; 852 } 853 854 class JvmtiClassFileLoadHookPoster : public StackObj { 855 private: 856 Symbol* _h_name; 857 Handle _class_loader; 858 Handle _h_protection_domain; 859 unsigned char ** _data_ptr; 860 unsigned char ** _end_ptr; 861 JavaThread * _thread; 862 jint _curr_len; 863 unsigned char * _curr_data; 864 JvmtiEnv * _curr_env; 865 JvmtiCachedClassFileData ** _cached_class_file_ptr; 866 JvmtiThreadState * _state; 867 Klass* _class_being_redefined; 868 JvmtiClassLoadKind _load_kind; 869 bool _has_been_modified; 870 871 public: 872 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 873 Handle h_protection_domain, 874 unsigned char **data_ptr, unsigned char **end_ptr, 875 JvmtiCachedClassFileData **cache_ptr) { 876 _h_name = h_name; 877 _class_loader = class_loader; 878 _h_protection_domain = h_protection_domain; 879 _data_ptr = data_ptr; 880 _end_ptr = end_ptr; 881 _thread = JavaThread::current(); 882 _curr_len = *end_ptr - *data_ptr; 883 _curr_data = *data_ptr; 884 _curr_env = NULL; 885 _cached_class_file_ptr = cache_ptr; 886 _has_been_modified = false; 887 888 _state = _thread->jvmti_thread_state(); 889 if (_state != NULL) { 890 _class_being_redefined = _state->get_class_being_redefined(); 891 _load_kind = _state->get_class_load_kind(); 892 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined; 893 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) { 894 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module(); 895 assert(module_entry != NULL, "module_entry should always be set"); 896 if (module_entry->is_named() && 897 module_entry->module() != NULL && 898 !module_entry->has_default_read_edges()) { 899 if (!module_entry->set_has_default_read_edges()) { 900 // We won a potential race. 901 // Add read edges to the unnamed modules of the bootstrap and app class loaders 902 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module 903 JvmtiExport::add_default_read_edges(class_module, _thread); 904 } 905 } 906 } 907 // Clear class_being_redefined flag here. The action 908 // from agent handler could generate a new class file load 909 // hook event and if it is not cleared the new event generated 910 // from regular class file load could have this stale redefined 911 // class handle info. 912 _state->clear_class_being_redefined(); 913 } else { 914 // redefine and retransform will always set the thread state 915 _class_being_redefined = NULL; 916 _load_kind = jvmti_class_load_kind_load; 917 } 918 } 919 920 void post() { 921 post_all_envs(); 922 copy_modified_data(); 923 } 924 925 bool has_been_modified() { return _has_been_modified; } 926 927 private: 928 void post_all_envs() { 929 if (_load_kind != jvmti_class_load_kind_retransform) { 930 // for class load and redefine, 931 // call the non-retransformable agents 932 JvmtiEnvIterator it; 933 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 934 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 935 // non-retransformable agents cannot retransform back, 936 // so no need to cache the original class file bytes 937 post_to_env(env, false); 938 } 939 } 940 } 941 JvmtiEnvIterator it; 942 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 943 // retransformable agents get all events 944 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 945 // retransformable agents need to cache the original class file 946 // bytes if changes are made via the ClassFileLoadHook 947 post_to_env(env, true); 948 } 949 } 950 } 951 952 void post_to_env(JvmtiEnv* env, bool caching_needed) { 953 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) { 954 return; 955 } 956 unsigned char *new_data = NULL; 957 jint new_len = 0; 958 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 959 _h_protection_domain, 960 _class_being_redefined); 961 JvmtiJavaThreadEventTransition jet(_thread); 962 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 963 if (callback != NULL) { 964 (*callback)(env->jvmti_external(), jem.jni_env(), 965 jem.class_being_redefined(), 966 jem.jloader(), jem.class_name(), 967 jem.protection_domain(), 968 _curr_len, _curr_data, 969 &new_len, &new_data); 970 } 971 if (new_data != NULL) { 972 // this agent has modified class data. 973 _has_been_modified = true; 974 if (caching_needed && *_cached_class_file_ptr == NULL) { 975 // data has been changed by the new retransformable agent 976 // and it hasn't already been cached, cache it 977 JvmtiCachedClassFileData *p; 978 p = (JvmtiCachedClassFileData *)os::malloc( 979 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal); 980 if (p == NULL) { 981 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len, 982 OOM_MALLOC_ERROR, 983 "unable to allocate cached copy of original class bytes"); 984 } 985 p->length = _curr_len; 986 memcpy(p->data, _curr_data, _curr_len); 987 *_cached_class_file_ptr = p; 988 } 989 990 if (_curr_data != *_data_ptr) { 991 // curr_data is previous agent modified class data. 992 // And this has been changed by the new agent so 993 // we can delete it now. 994 _curr_env->Deallocate(_curr_data); 995 } 996 997 // Class file data has changed by the current agent. 998 _curr_data = new_data; 999 _curr_len = new_len; 1000 // Save the current agent env we need this to deallocate the 1001 // memory allocated by this agent. 1002 _curr_env = env; 1003 } 1004 } 1005 1006 void copy_modified_data() { 1007 // if one of the agent has modified class file data. 1008 // Copy modified class data to new resources array. 1009 if (_curr_data != *_data_ptr) { 1010 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 1011 memcpy(*_data_ptr, _curr_data, _curr_len); 1012 *_end_ptr = *_data_ptr + _curr_len; 1013 _curr_env->Deallocate(_curr_data); 1014 } 1015 } 1016 }; 1017 1018 bool JvmtiExport::is_early_phase() { 1019 return JvmtiEnvBase::get_phase() <= JVMTI_PHASE_PRIMORDIAL; 1020 } 1021 1022 bool JvmtiExport::has_early_class_hook_env() { 1023 JvmtiEnvIterator it; 1024 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1025 if (env->early_class_hook_env()) { 1026 return true; 1027 } 1028 } 1029 return false; 1030 } 1031 1032 bool JvmtiExport::_should_post_class_file_load_hook = false; 1033 1034 // this entry is for class file load hook on class load, redefine and retransform 1035 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name, 1036 Handle class_loader, 1037 Handle h_protection_domain, 1038 unsigned char **data_ptr, 1039 unsigned char **end_ptr, 1040 JvmtiCachedClassFileData **cache_ptr) { 1041 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1042 return false; 1043 } 1044 1045 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 1046 h_protection_domain, 1047 data_ptr, end_ptr, 1048 cache_ptr); 1049 poster.post(); 1050 return poster.has_been_modified(); 1051 } 1052 1053 void JvmtiExport::report_unsupported(bool on) { 1054 // If any JVMTI service is turned on, we need to exit before native code 1055 // tries to access nonexistant services. 1056 if (on) { 1057 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 1058 } 1059 } 1060 1061 1062 static inline Klass* oop_to_klass(oop obj) { 1063 Klass* k = obj->klass(); 1064 1065 // if the object is a java.lang.Class then return the java mirror 1066 if (k == SystemDictionary::Class_klass()) { 1067 if (!java_lang_Class::is_primitive(obj)) { 1068 k = java_lang_Class::as_Klass(obj); 1069 assert(k != NULL, "class for non-primitive mirror must exist"); 1070 } 1071 } 1072 return k; 1073 } 1074 1075 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark { 1076 private: 1077 jobject _jobj; 1078 jlong _size; 1079 public: 1080 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) { 1081 _jobj = (jobject)to_jobject(obj); 1082 _size = obj->size() * wordSize; 1083 }; 1084 jobject jni_jobject() { return _jobj; } 1085 jlong size() { return _size; } 1086 }; 1087 1088 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 1089 private: 1090 jint _code_size; 1091 const void *_code_data; 1092 jint _map_length; 1093 jvmtiAddrLocationMap *_map; 1094 const void *_compile_info; 1095 public: 1096 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 1097 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 1098 _code_data = nm->insts_begin(); 1099 _code_size = nm->insts_size(); 1100 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 1101 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 1102 } 1103 ~JvmtiCompiledMethodLoadEventMark() { 1104 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); 1105 } 1106 1107 jint code_size() { return _code_size; } 1108 const void *code_data() { return _code_data; } 1109 jint map_length() { return _map_length; } 1110 const jvmtiAddrLocationMap* map() { return _map; } 1111 const void *compile_info() { return _compile_info; } 1112 }; 1113 1114 1115 1116 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 1117 private: 1118 jobject _jobj; 1119 public: 1120 JvmtiMonitorEventMark(JavaThread *thread, oop object) 1121 : JvmtiThreadEventMark(thread){ 1122 _jobj = to_jobject(object); 1123 } 1124 jobject jni_object() { return _jobj; } 1125 }; 1126 1127 /////////////////////////////////////////////////////////////// 1128 // 1129 // pending CompiledMethodUnload support 1130 // 1131 1132 void JvmtiExport::post_compiled_method_unload( 1133 jmethodID method, const void *code_begin) { 1134 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1135 return; 1136 } 1137 JavaThread* thread = JavaThread::current(); 1138 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1139 ("[%s] method compile unload event triggered", 1140 JvmtiTrace::safe_get_thread_name(thread))); 1141 1142 // post the event for each environment that has this event enabled. 1143 JvmtiEnvIterator it; 1144 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1145 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 1146 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1147 continue; 1148 } 1149 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1150 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT, 1151 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 1152 1153 ResourceMark rm(thread); 1154 1155 JvmtiEventMark jem(thread); 1156 JvmtiJavaThreadEventTransition jet(thread); 1157 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 1158 if (callback != NULL) { 1159 (*callback)(env->jvmti_external(), method, code_begin); 1160 } 1161 } 1162 } 1163 } 1164 1165 /////////////////////////////////////////////////////////////// 1166 // 1167 // JvmtiExport 1168 // 1169 1170 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) { 1171 HandleMark hm(thread); 1172 methodHandle mh(thread, method); 1173 1174 JvmtiThreadState *state = thread->jvmti_thread_state(); 1175 if (state == NULL) { 1176 return; 1177 } 1178 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered", 1179 JvmtiTrace::safe_get_thread_name(thread))); 1180 JvmtiEnvThreadStateIterator it(state); 1181 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1182 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 1183 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 1184 ThreadState old_os_state = thread->osthread()->get_state(); 1185 thread->osthread()->set_state(BREAKPOINTED); 1186 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT, 1187 JvmtiTrace::safe_get_thread_name(thread), 1188 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1189 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1190 location - mh()->code_base() )); 1191 1192 JvmtiEnv *env = ets->get_env(); 1193 JvmtiLocationEventMark jem(thread, mh, location); 1194 JvmtiJavaThreadEventTransition jet(thread); 1195 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 1196 if (callback != NULL) { 1197 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1198 jem.jni_methodID(), jem.location()); 1199 } 1200 1201 ets->set_breakpoint_posted(); 1202 thread->osthread()->set_state(old_os_state); 1203 } 1204 } 1205 } 1206 1207 ////////////////////////////////////////////////////////////////////////////// 1208 1209 bool JvmtiExport::_can_get_source_debug_extension = false; 1210 bool JvmtiExport::_can_maintain_original_method_order = false; 1211 bool JvmtiExport::_can_post_interpreter_events = false; 1212 bool JvmtiExport::_can_post_on_exceptions = false; 1213 bool JvmtiExport::_can_post_breakpoint = false; 1214 bool JvmtiExport::_can_post_field_access = false; 1215 bool JvmtiExport::_can_post_field_modification = false; 1216 bool JvmtiExport::_can_post_method_entry = false; 1217 bool JvmtiExport::_can_post_method_exit = false; 1218 bool JvmtiExport::_can_pop_frame = false; 1219 bool JvmtiExport::_can_force_early_return = false; 1220 bool JvmtiExport::_can_get_owned_monitor_info = false; 1221 1222 bool JvmtiExport::_early_vmstart_recorded = false; 1223 1224 bool JvmtiExport::_should_post_single_step = false; 1225 bool JvmtiExport::_should_post_field_access = false; 1226 bool JvmtiExport::_should_post_field_modification = false; 1227 bool JvmtiExport::_should_post_class_load = false; 1228 bool JvmtiExport::_should_post_class_prepare = false; 1229 bool JvmtiExport::_should_post_class_unload = false; 1230 bool JvmtiExport::_should_post_thread_life = false; 1231 bool JvmtiExport::_should_clean_up_heap_objects = false; 1232 bool JvmtiExport::_should_post_native_method_bind = false; 1233 bool JvmtiExport::_should_post_dynamic_code_generated = false; 1234 bool JvmtiExport::_should_post_data_dump = false; 1235 bool JvmtiExport::_should_post_compiled_method_load = false; 1236 bool JvmtiExport::_should_post_compiled_method_unload = false; 1237 bool JvmtiExport::_should_post_monitor_contended_enter = false; 1238 bool JvmtiExport::_should_post_monitor_contended_entered = false; 1239 bool JvmtiExport::_should_post_monitor_wait = false; 1240 bool JvmtiExport::_should_post_monitor_waited = false; 1241 bool JvmtiExport::_should_post_garbage_collection_start = false; 1242 bool JvmtiExport::_should_post_garbage_collection_finish = false; 1243 bool JvmtiExport::_should_post_object_free = false; 1244 bool JvmtiExport::_should_post_resource_exhausted = false; 1245 bool JvmtiExport::_should_post_vm_object_alloc = false; 1246 bool JvmtiExport::_should_post_sampled_object_alloc = false; 1247 bool JvmtiExport::_should_post_on_exceptions = false; 1248 1249 //////////////////////////////////////////////////////////////////////////////////////////////// 1250 1251 1252 // 1253 // JVMTI single step management 1254 // 1255 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) { 1256 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 1257 1258 HandleMark hm(thread); 1259 methodHandle mh(thread, method); 1260 1261 // update information about current location and post a step event 1262 JvmtiThreadState *state = thread->jvmti_thread_state(); 1263 if (state == NULL) { 1264 return; 1265 } 1266 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered", 1267 JvmtiTrace::safe_get_thread_name(thread))); 1268 if (!state->hide_single_stepping()) { 1269 if (state->is_pending_step_for_popframe()) { 1270 state->process_pending_step_for_popframe(); 1271 } 1272 if (state->is_pending_step_for_earlyret()) { 1273 state->process_pending_step_for_earlyret(); 1274 } 1275 JvmtiExport::post_single_step(thread, mh(), location); 1276 } 1277 } 1278 1279 1280 void JvmtiExport::expose_single_stepping(JavaThread *thread) { 1281 JvmtiThreadState *state = thread->jvmti_thread_state(); 1282 if (state != NULL) { 1283 state->clear_hide_single_stepping(); 1284 } 1285 } 1286 1287 1288 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 1289 JvmtiThreadState *state = thread->jvmti_thread_state(); 1290 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1291 state->set_hide_single_stepping(); 1292 return true; 1293 } else { 1294 return false; 1295 } 1296 } 1297 1298 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) { 1299 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1300 return; 1301 } 1302 HandleMark hm(thread); 1303 1304 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered", 1305 JvmtiTrace::safe_get_thread_name(thread))); 1306 JvmtiThreadState* state = thread->jvmti_thread_state(); 1307 if (state == NULL) { 1308 return; 1309 } 1310 JvmtiEnvThreadStateIterator it(state); 1311 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1312 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 1313 JvmtiEnv *env = ets->get_env(); 1314 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1315 continue; 1316 } 1317 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s", 1318 JvmtiTrace::safe_get_thread_name(thread), 1319 klass==NULL? "NULL" : klass->external_name() )); 1320 JvmtiClassEventMark jem(thread, klass); 1321 JvmtiJavaThreadEventTransition jet(thread); 1322 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 1323 if (callback != NULL) { 1324 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1325 } 1326 } 1327 } 1328 } 1329 1330 1331 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) { 1332 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1333 return; 1334 } 1335 HandleMark hm(thread); 1336 1337 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered", 1338 JvmtiTrace::safe_get_thread_name(thread))); 1339 JvmtiThreadState* state = thread->jvmti_thread_state(); 1340 if (state == NULL) { 1341 return; 1342 } 1343 JvmtiEnvThreadStateIterator it(state); 1344 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1345 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 1346 JvmtiEnv *env = ets->get_env(); 1347 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1348 continue; 1349 } 1350 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s", 1351 JvmtiTrace::safe_get_thread_name(thread), 1352 klass==NULL? "NULL" : klass->external_name() )); 1353 JvmtiClassEventMark jem(thread, klass); 1354 JvmtiJavaThreadEventTransition jet(thread); 1355 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 1356 if (callback != NULL) { 1357 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1358 } 1359 } 1360 } 1361 } 1362 1363 void JvmtiExport::post_class_unload(Klass* klass) { 1364 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1365 return; 1366 } 1367 1368 // postings to the service thread so that it can perform them in a safe 1369 // context and in-order. 1370 ResourceMark rm; 1371 // JvmtiDeferredEvent copies the string. 1372 JvmtiDeferredEvent event = JvmtiDeferredEvent::class_unload_event(klass->name()->as_C_string()); 1373 ServiceThread::enqueue_deferred_event(&event); 1374 } 1375 1376 1377 void JvmtiExport::post_class_unload_internal(const char* name) { 1378 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1379 return; 1380 } 1381 assert(Thread::current()->is_service_thread(), "must be called from ServiceThread"); 1382 JavaThread *thread = JavaThread::current(); 1383 HandleMark hm(thread); 1384 1385 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" )); 1386 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1387 1388 JvmtiEnvIterator it; 1389 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1390 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1391 continue; 1392 } 1393 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1394 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s", name)); 1395 1396 JvmtiEventMark jem(thread); 1397 JvmtiJavaThreadEventTransition jet(thread); 1398 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 1399 if (callback != NULL) { 1400 (*callback)(env->jvmti_external(), jem.jni_env(), name); 1401 } 1402 } 1403 } 1404 } 1405 } 1406 1407 1408 void JvmtiExport::post_thread_start(JavaThread *thread) { 1409 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1410 return; 1411 } 1412 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1413 1414 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered", 1415 JvmtiTrace::safe_get_thread_name(thread))); 1416 1417 // do JVMTI thread initialization (if needed) 1418 JvmtiEventController::thread_started(thread); 1419 1420 // Do not post thread start event for hidden java thread. 1421 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1422 !thread->is_hidden_from_external_view()) { 1423 JvmtiEnvIterator it; 1424 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1425 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1426 continue; 1427 } 1428 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1429 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent", 1430 JvmtiTrace::safe_get_thread_name(thread) )); 1431 1432 JvmtiThreadEventMark jem(thread); 1433 JvmtiJavaThreadEventTransition jet(thread); 1434 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1435 if (callback != NULL) { 1436 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1437 } 1438 } 1439 } 1440 } 1441 } 1442 1443 1444 void JvmtiExport::post_thread_end(JavaThread *thread) { 1445 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1446 return; 1447 } 1448 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered", 1449 JvmtiTrace::safe_get_thread_name(thread))); 1450 1451 JvmtiThreadState *state = thread->jvmti_thread_state(); 1452 if (state == NULL) { 1453 return; 1454 } 1455 1456 // Do not post thread end event for hidden java thread. 1457 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1458 !thread->is_hidden_from_external_view()) { 1459 1460 JvmtiEnvThreadStateIterator it(state); 1461 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1462 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1463 JvmtiEnv *env = ets->get_env(); 1464 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1465 continue; 1466 } 1467 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent", 1468 JvmtiTrace::safe_get_thread_name(thread) )); 1469 1470 JvmtiThreadEventMark jem(thread); 1471 JvmtiJavaThreadEventTransition jet(thread); 1472 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1473 if (callback != NULL) { 1474 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1475 } 1476 } 1477 } 1478 } 1479 } 1480 1481 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1482 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1483 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1484 1485 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" )); 1486 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent")); 1487 1488 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1489 if (callback != NULL) { 1490 (*callback)(env->jvmti_external(), tag); 1491 } 1492 } 1493 1494 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1495 1496 JavaThread *thread = JavaThread::current(); 1497 1498 // JDK-8213834: handlers of ResourceExhausted may attempt some analysis 1499 // which often requires running java. 1500 // This will cause problems on threads not able to run java, e.g. compiler 1501 // threads. To forestall these problems, we therefore suppress sending this 1502 // event from threads which are not able to run java. 1503 if (!thread->can_call_java()) { 1504 return; 1505 } 1506 1507 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" )); 1508 1509 JvmtiEnvIterator it; 1510 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1511 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1512 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" )); 1513 1514 JvmtiThreadEventMark jem(thread); 1515 JvmtiJavaThreadEventTransition jet(thread); 1516 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1517 if (callback != NULL) { 1518 (*callback)(env->jvmti_external(), jem.jni_env(), 1519 resource_exhausted_flags, NULL, description); 1520 } 1521 } 1522 } 1523 } 1524 1525 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) { 1526 HandleMark hm(thread); 1527 methodHandle mh(thread, method); 1528 1529 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s", 1530 JvmtiTrace::safe_get_thread_name(thread), 1531 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1532 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1533 1534 JvmtiThreadState* state = thread->jvmti_thread_state(); 1535 if (state == NULL || !state->is_interp_only_mode()) { 1536 // for any thread that actually wants method entry, interp_only_mode is set 1537 return; 1538 } 1539 1540 state->incr_cur_stack_depth(); 1541 1542 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1543 JvmtiEnvThreadStateIterator it(state); 1544 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1545 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1546 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s", 1547 JvmtiTrace::safe_get_thread_name(thread), 1548 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1549 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1550 1551 JvmtiEnv *env = ets->get_env(); 1552 JvmtiMethodEventMark jem(thread, mh); 1553 JvmtiJavaThreadEventTransition jet(thread); 1554 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1555 if (callback != NULL) { 1556 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1557 } 1558 } 1559 } 1560 } 1561 } 1562 1563 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) { 1564 HandleMark hm(thread); 1565 methodHandle mh(thread, method); 1566 1567 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s", 1568 JvmtiTrace::safe_get_thread_name(thread), 1569 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1570 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1571 1572 JvmtiThreadState *state = thread->jvmti_thread_state(); 1573 if (state == NULL || !state->is_interp_only_mode()) { 1574 // for any thread that actually wants method exit, interp_only_mode is set 1575 return; 1576 } 1577 1578 // return a flag when a method terminates by throwing an exception 1579 // i.e. if an exception is thrown and it's not caught by the current method 1580 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1581 1582 1583 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1584 Handle result; 1585 jvalue value; 1586 value.j = 0L; 1587 1588 // if the method hasn't been popped because of an exception then we populate 1589 // the return_value parameter for the callback. At this point we only have 1590 // the address of a "raw result" and we just call into the interpreter to 1591 // convert this into a jvalue. 1592 if (!exception_exit) { 1593 oop oop_result; 1594 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1595 if (is_reference_type(type)) { 1596 result = Handle(thread, oop_result); 1597 } 1598 } 1599 1600 JvmtiEnvThreadStateIterator it(state); 1601 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1602 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1603 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s", 1604 JvmtiTrace::safe_get_thread_name(thread), 1605 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1606 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1607 1608 JvmtiEnv *env = ets->get_env(); 1609 JvmtiMethodEventMark jem(thread, mh); 1610 if (result.not_null()) { 1611 value.l = JNIHandles::make_local(thread, result()); 1612 } 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 ets->clear_frame_pop(cur_frame_number); 1649 } 1650 } 1651 } 1652 1653 state->decr_cur_stack_depth(); 1654 } 1655 1656 1657 // Todo: inline this for optimization 1658 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) { 1659 HandleMark hm(thread); 1660 methodHandle mh(thread, method); 1661 1662 JvmtiThreadState *state = thread->jvmti_thread_state(); 1663 if (state == NULL) { 1664 return; 1665 } 1666 JvmtiEnvThreadStateIterator it(state); 1667 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1668 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1669 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1670 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT, 1671 JvmtiTrace::safe_get_thread_name(thread), 1672 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1673 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1674 location - mh()->code_base() )); 1675 1676 JvmtiEnv *env = ets->get_env(); 1677 JvmtiLocationEventMark jem(thread, mh, location); 1678 JvmtiJavaThreadEventTransition jet(thread); 1679 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1680 if (callback != NULL) { 1681 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1682 jem.jni_methodID(), jem.location()); 1683 } 1684 1685 ets->set_single_stepping_posted(); 1686 } 1687 } 1688 } 1689 1690 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) { 1691 HandleMark hm(thread); 1692 methodHandle mh(thread, method); 1693 Handle exception_handle(thread, exception); 1694 1695 JvmtiThreadState *state = thread->jvmti_thread_state(); 1696 if (state == NULL) { 1697 return; 1698 } 1699 1700 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered", 1701 JvmtiTrace::safe_get_thread_name(thread))); 1702 if (!state->is_exception_detected()) { 1703 state->set_exception_detected(); 1704 JvmtiEnvThreadStateIterator it(state); 1705 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1706 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1707 1708 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1709 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT, 1710 JvmtiTrace::safe_get_thread_name(thread), 1711 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1712 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1713 location - mh()->code_base() )); 1714 1715 JvmtiEnv *env = ets->get_env(); 1716 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1717 1718 // It's okay to clear these exceptions here because we duplicate 1719 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1720 EXCEPTION_MARK; 1721 1722 bool should_repeat; 1723 vframeStream st(thread); 1724 assert(!st.at_end(), "cannot be at end"); 1725 Method* current_method = NULL; 1726 // A GC may occur during the Method::fast_exception_handler_bci_for() 1727 // call below if it needs to load the constraint class. Using a 1728 // methodHandle to keep the 'current_method' from being deallocated 1729 // if GC happens. 1730 methodHandle current_mh = methodHandle(thread, current_method); 1731 int current_bci = -1; 1732 do { 1733 current_method = st.method(); 1734 current_mh = methodHandle(thread, current_method); 1735 current_bci = st.bci(); 1736 do { 1737 should_repeat = false; 1738 Klass* eh_klass = exception_handle()->klass(); 1739 current_bci = Method::fast_exception_handler_bci_for( 1740 current_mh, eh_klass, current_bci, THREAD); 1741 if (HAS_PENDING_EXCEPTION) { 1742 exception_handle = Handle(thread, PENDING_EXCEPTION); 1743 CLEAR_PENDING_EXCEPTION; 1744 should_repeat = true; 1745 } 1746 } while (should_repeat && (current_bci != -1)); 1747 st.next(); 1748 } while ((current_bci < 0) && (!st.at_end())); 1749 1750 jmethodID catch_jmethodID; 1751 if (current_bci < 0) { 1752 catch_jmethodID = 0; 1753 current_bci = 0; 1754 } else { 1755 catch_jmethodID = jem.to_jmethodID(current_mh); 1756 } 1757 1758 JvmtiJavaThreadEventTransition jet(thread); 1759 jvmtiEventException callback = env->callbacks()->Exception; 1760 if (callback != NULL) { 1761 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1762 jem.jni_methodID(), jem.location(), 1763 jem.exception(), 1764 catch_jmethodID, current_bci); 1765 } 1766 } 1767 } 1768 } 1769 1770 // frames may get popped because of this throw, be safe - invalidate cached depth 1771 state->invalidate_cur_stack_depth(); 1772 } 1773 1774 1775 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) { 1776 HandleMark hm(thread); 1777 methodHandle mh(thread, method); 1778 Handle exception_handle(thread, exception); 1779 1780 JvmtiThreadState *state = thread->jvmti_thread_state(); 1781 if (state == NULL) { 1782 return; 1783 } 1784 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1785 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s", 1786 JvmtiTrace::safe_get_thread_name(thread), 1787 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1788 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1789 location==0? "no location:" : "", 1790 location==0? 0 : location - mh()->code_base(), 1791 in_handler_frame? "in handler frame" : "not handler frame" )); 1792 1793 if (state->is_exception_detected()) { 1794 1795 state->invalidate_cur_stack_depth(); 1796 if (!in_handler_frame) { 1797 // Not in exception handler. 1798 if(state->is_interp_only_mode()) { 1799 // method exit and frame pop events are posted only in interp mode. 1800 // When these events are enabled code should be in running in interp mode. 1801 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1802 // The cached cur_stack_depth might have changed from the 1803 // operations of frame pop or method exit. We are not 100% sure 1804 // the cached cur_stack_depth is still valid depth so invalidate 1805 // it. 1806 state->invalidate_cur_stack_depth(); 1807 } 1808 } else { 1809 // In exception handler frame. Report exception catch. 1810 assert(location != NULL, "must be a known location"); 1811 // Update cur_stack_depth - the frames above the current frame 1812 // have been unwound due to this exception: 1813 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1814 state->set_exception_caught(); 1815 1816 JvmtiEnvThreadStateIterator it(state); 1817 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1818 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1819 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1820 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT, 1821 JvmtiTrace::safe_get_thread_name(thread), 1822 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1823 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1824 location - mh()->code_base() )); 1825 1826 JvmtiEnv *env = ets->get_env(); 1827 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1828 JvmtiJavaThreadEventTransition jet(thread); 1829 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1830 if (callback != NULL) { 1831 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1832 jem.jni_methodID(), jem.location(), 1833 jem.exception()); 1834 } 1835 } 1836 } 1837 } 1838 } 1839 } 1840 1841 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1842 Klass* klass, jfieldID fieldID, bool is_static) { 1843 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1844 // At least one field access watch is set so we have more work 1845 // to do. This wrapper is used by entry points that allow us 1846 // to create handles in post_field_access_by_jni(). 1847 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1848 // event posting can block so refetch oop if we were passed a jobj 1849 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1850 } 1851 return obj; 1852 } 1853 1854 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1855 Klass* klass, jfieldID fieldID, bool is_static) { 1856 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1857 // At least one field access watch is set so we have more work 1858 // to do. This wrapper is used by "quick" entry points that don't 1859 // allow us to create handles in post_field_access_by_jni(). We 1860 // override that with a ResetNoHandleMark. 1861 ResetNoHandleMark rnhm; 1862 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1863 // event posting can block so refetch oop if we were passed a jobj 1864 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1865 } 1866 return obj; 1867 } 1868 1869 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1870 Klass* klass, jfieldID fieldID, bool is_static) { 1871 // We must be called with a Java context in order to provide reasonable 1872 // values for the klazz, method, and location fields. The callers of this 1873 // function don't make the call unless there is a Java context. 1874 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1875 1876 ResourceMark rm; 1877 fieldDescriptor fd; 1878 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1879 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1880 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1881 if (!valid_fieldID) return; 1882 // field accesses are not watched so bail 1883 if (!fd.is_field_access_watched()) return; 1884 1885 HandleMark hm(thread); 1886 Handle h_obj; 1887 if (!is_static) { 1888 // non-static field accessors have an object, but we need a handle 1889 assert(obj != NULL, "non-static needs an object"); 1890 h_obj = Handle(thread, obj); 1891 } 1892 post_field_access(thread, 1893 thread->last_frame().interpreter_frame_method(), 1894 thread->last_frame().interpreter_frame_bcp(), 1895 klass, h_obj, fieldID); 1896 } 1897 1898 void JvmtiExport::post_field_access(JavaThread *thread, Method* method, 1899 address location, Klass* field_klass, Handle object, jfieldID field) { 1900 1901 HandleMark hm(thread); 1902 methodHandle mh(thread, method); 1903 1904 JvmtiThreadState *state = thread->jvmti_thread_state(); 1905 if (state == NULL) { 1906 return; 1907 } 1908 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered", 1909 JvmtiTrace::safe_get_thread_name(thread))); 1910 JvmtiEnvThreadStateIterator it(state); 1911 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1912 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1913 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT, 1914 JvmtiTrace::safe_get_thread_name(thread), 1915 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1916 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1917 location - mh()->code_base() )); 1918 1919 JvmtiEnv *env = ets->get_env(); 1920 JvmtiLocationEventMark jem(thread, mh, location); 1921 jclass field_jclass = jem.to_jclass(field_klass); 1922 jobject field_jobject = jem.to_jobject(object()); 1923 JvmtiJavaThreadEventTransition jet(thread); 1924 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1925 if (callback != NULL) { 1926 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1927 jem.jni_methodID(), jem.location(), 1928 field_jclass, field_jobject, field); 1929 } 1930 } 1931 } 1932 } 1933 1934 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1935 Klass* klass, jfieldID fieldID, bool is_static, 1936 char sig_type, jvalue *value) { 1937 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1938 // At least one field modification watch is set so we have more work 1939 // to do. This wrapper is used by entry points that allow us 1940 // to create handles in post_field_modification_by_jni(). 1941 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1942 // event posting can block so refetch oop if we were passed a jobj 1943 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1944 } 1945 return obj; 1946 } 1947 1948 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1949 Klass* klass, jfieldID fieldID, bool is_static, 1950 char sig_type, jvalue *value) { 1951 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1952 // At least one field modification watch is set so we have more work 1953 // to do. This wrapper is used by "quick" entry points that don't 1954 // allow us to create handles in post_field_modification_by_jni(). We 1955 // override that with a ResetNoHandleMark. 1956 ResetNoHandleMark rnhm; 1957 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1958 // event posting can block so refetch oop if we were passed a jobj 1959 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1960 } 1961 return obj; 1962 } 1963 1964 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1965 Klass* klass, jfieldID fieldID, bool is_static, 1966 char sig_type, jvalue *value) { 1967 // We must be called with a Java context in order to provide reasonable 1968 // values for the klazz, method, and location fields. The callers of this 1969 // function don't make the call unless there is a Java context. 1970 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1971 1972 ResourceMark rm; 1973 fieldDescriptor fd; 1974 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1975 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1976 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1977 if (!valid_fieldID) return; 1978 // field modifications are not watched so bail 1979 if (!fd.is_field_modification_watched()) return; 1980 1981 HandleMark hm(thread); 1982 1983 Handle h_obj; 1984 if (!is_static) { 1985 // non-static field accessors have an object, but we need a handle 1986 assert(obj != NULL, "non-static needs an object"); 1987 h_obj = Handle(thread, obj); 1988 } 1989 post_field_modification(thread, 1990 thread->last_frame().interpreter_frame_method(), 1991 thread->last_frame().interpreter_frame_bcp(), 1992 klass, h_obj, fieldID, sig_type, value); 1993 } 1994 1995 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method, 1996 address location, Klass* field_klass, Handle object, jfieldID field, 1997 char sig_type, jvalue *value) { 1998 1999 if (sig_type == JVM_SIGNATURE_INT || sig_type == JVM_SIGNATURE_BOOLEAN || 2000 sig_type == JVM_SIGNATURE_BYTE || sig_type == JVM_SIGNATURE_CHAR || 2001 sig_type == JVM_SIGNATURE_SHORT) { 2002 // 'I' instructions are used for byte, char, short and int. 2003 // determine which it really is, and convert 2004 fieldDescriptor fd; 2005 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd); 2006 // should be found (if not, leave as is) 2007 if (found) { 2008 jint ival = value->i; 2009 // convert value from int to appropriate type 2010 switch (fd.field_type()) { 2011 case T_BOOLEAN: 2012 sig_type = JVM_SIGNATURE_BOOLEAN; 2013 value->i = 0; // clear it 2014 value->z = (jboolean)ival; 2015 break; 2016 case T_BYTE: 2017 sig_type = JVM_SIGNATURE_BYTE; 2018 value->i = 0; // clear it 2019 value->b = (jbyte)ival; 2020 break; 2021 case T_CHAR: 2022 sig_type = JVM_SIGNATURE_CHAR; 2023 value->i = 0; // clear it 2024 value->c = (jchar)ival; 2025 break; 2026 case T_SHORT: 2027 sig_type = JVM_SIGNATURE_SHORT; 2028 value->i = 0; // clear it 2029 value->s = (jshort)ival; 2030 break; 2031 case T_INT: 2032 // nothing to do 2033 break; 2034 default: 2035 // this is an integer instruction, should be one of above 2036 ShouldNotReachHere(); 2037 break; 2038 } 2039 } 2040 } 2041 2042 assert(sig_type != JVM_SIGNATURE_ARRAY, "array should have sig_type == 'L'"); 2043 bool handle_created = false; 2044 2045 // convert oop to JNI handle. 2046 if (sig_type == JVM_SIGNATURE_CLASS) { 2047 handle_created = true; 2048 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 2049 } 2050 2051 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 2052 2053 // Destroy the JNI handle allocated above. 2054 if (handle_created) { 2055 JNIHandles::destroy_local(value->l); 2056 } 2057 } 2058 2059 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method, 2060 address location, Klass* field_klass, Handle object, jfieldID field, 2061 char sig_type, jvalue *value_ptr) { 2062 2063 HandleMark hm(thread); 2064 methodHandle mh(thread, method); 2065 2066 JvmtiThreadState *state = thread->jvmti_thread_state(); 2067 if (state == NULL) { 2068 return; 2069 } 2070 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2071 ("[%s] Trg Field Modification event triggered", 2072 JvmtiTrace::safe_get_thread_name(thread))); 2073 2074 JvmtiEnvThreadStateIterator it(state); 2075 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2076 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 2077 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2078 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT, 2079 JvmtiTrace::safe_get_thread_name(thread), 2080 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 2081 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 2082 location - mh()->code_base() )); 2083 2084 JvmtiEnv *env = ets->get_env(); 2085 JvmtiLocationEventMark jem(thread, mh, location); 2086 jclass field_jclass = jem.to_jclass(field_klass); 2087 jobject field_jobject = jem.to_jobject(object()); 2088 JvmtiJavaThreadEventTransition jet(thread); 2089 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 2090 if (callback != NULL) { 2091 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2092 jem.jni_methodID(), jem.location(), 2093 field_jclass, field_jobject, field, sig_type, *value_ptr); 2094 } 2095 } 2096 } 2097 } 2098 2099 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) { 2100 JavaThread* thread = JavaThread::current(); 2101 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 2102 2103 HandleMark hm(thread); 2104 methodHandle mh(thread, method); 2105 2106 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered", 2107 JvmtiTrace::safe_get_thread_name(thread))); 2108 2109 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2110 JvmtiEnvIterator it; 2111 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2112 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2113 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent", 2114 JvmtiTrace::safe_get_thread_name(thread) )); 2115 2116 JvmtiMethodEventMark jem(thread, mh); 2117 JvmtiJavaThreadEventTransition jet(thread); 2118 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env(); 2119 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 2120 if (callback != NULL) { 2121 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 2122 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 2123 } 2124 } 2125 } 2126 } 2127 } 2128 2129 // Returns a record containing inlining information for the given nmethod 2130 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 2131 jint numstackframes = 0; 2132 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 2133 record->header.kind = JVMTI_CMLR_INLINE_INFO; 2134 record->header.next = NULL; 2135 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 2136 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 2137 record->numpcs = 0; 2138 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2139 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2140 record->numpcs++; 2141 } 2142 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 2143 int scope = 0; 2144 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2145 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2146 void* pc_address = (void*)p->real_pc(nm); 2147 assert(pc_address != NULL, "pc_address must be non-null"); 2148 record->pcinfo[scope].pc = pc_address; 2149 numstackframes=0; 2150 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2151 numstackframes++; 2152 } 2153 assert(numstackframes != 0, "numstackframes must be nonzero."); 2154 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 2155 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 2156 record->pcinfo[scope].numstackframes = numstackframes; 2157 int stackframe = 0; 2158 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2159 // 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() 2160 guarantee(sd->method() != NULL, "sd->method() cannot be null."); 2161 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 2162 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 2163 stackframe++; 2164 } 2165 scope++; 2166 } 2167 return record; 2168 } 2169 2170 void JvmtiExport::post_compiled_method_load(nmethod *nm) { 2171 guarantee(!nm->is_unloading(), "nmethod isn't unloaded or unloading"); 2172 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 2173 return; 2174 } 2175 JavaThread* thread = JavaThread::current(); 2176 2177 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2178 ("[%s] method compile load event triggered", 2179 JvmtiTrace::safe_get_thread_name(thread))); 2180 2181 JvmtiEnvIterator it; 2182 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2183 post_compiled_method_load(env, nm); 2184 } 2185 } 2186 2187 // post a COMPILED_METHOD_LOAD event for a given environment 2188 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, nmethod *nm) { 2189 if (env->phase() == JVMTI_PHASE_PRIMORDIAL || !env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 2190 return; 2191 } 2192 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 2193 if (callback == NULL) { 2194 return; 2195 } 2196 JavaThread* thread = JavaThread::current(); 2197 2198 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2199 ("[%s] method compile load event sent %s.%s ", 2200 JvmtiTrace::safe_get_thread_name(thread), 2201 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 2202 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 2203 ResourceMark rm(thread); 2204 HandleMark hm(thread); 2205 2206 // Add inlining information 2207 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 2208 // Pass inlining information through the void pointer 2209 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 2210 JvmtiJavaThreadEventTransition jet(thread); 2211 (*callback)(env->jvmti_external(), jem.jni_methodID(), 2212 jem.code_size(), jem.code_data(), jem.map_length(), 2213 jem.map(), jem.compile_info()); 2214 } 2215 2216 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 2217 assert(name != NULL && name[0] != '\0', "sanity check"); 2218 2219 JavaThread* thread = JavaThread::current(); 2220 // In theory everyone coming thru here is in_vm but we need to be certain 2221 // because a callee will do a vm->native transition 2222 ThreadInVMfromUnknown __tiv; 2223 2224 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2225 ("[%s] method dynamic code generated event triggered", 2226 JvmtiTrace::safe_get_thread_name(thread))); 2227 JvmtiEnvIterator it; 2228 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2229 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2230 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2231 ("[%s] dynamic code generated event sent for %s", 2232 JvmtiTrace::safe_get_thread_name(thread), name)); 2233 JvmtiEventMark jem(thread); 2234 JvmtiJavaThreadEventTransition jet(thread); 2235 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2236 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2237 if (callback != NULL) { 2238 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2239 } 2240 } 2241 } 2242 } 2243 2244 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 2245 jvmtiPhase phase = JvmtiEnv::get_phase(); 2246 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 2247 post_dynamic_code_generated_internal(name, code_begin, code_end); 2248 } else { 2249 // It may not be safe to post the event from this thread. Defer all 2250 // postings to the service thread so that it can perform them in a safe 2251 // context and in-order. 2252 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 2253 name, code_begin, code_end); 2254 ServiceThread::enqueue_deferred_event(&event); 2255 } 2256 } 2257 2258 2259 // post a DYNAMIC_CODE_GENERATED event for a given environment 2260 // used by GenerateEvents 2261 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 2262 const void *code_begin, const void *code_end) 2263 { 2264 JavaThread* thread = JavaThread::current(); 2265 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2266 ("[%s] dynamic code generated event triggered (by GenerateEvents)", 2267 JvmtiTrace::safe_get_thread_name(thread))); 2268 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2269 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2270 ("[%s] dynamic code generated event sent for %s", 2271 JvmtiTrace::safe_get_thread_name(thread), name)); 2272 JvmtiEventMark jem(thread); 2273 JvmtiJavaThreadEventTransition jet(thread); 2274 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2275 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2276 if (callback != NULL) { 2277 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2278 } 2279 } 2280 } 2281 2282 // post a DynamicCodeGenerated event while holding locks in the VM. 2283 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 2284 address code_begin, address code_end) 2285 { 2286 // register the stub with the current dynamic code event collector 2287 // Cannot take safepoint here so do not use state_for to get 2288 // jvmti thread state. 2289 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2290 // state can only be NULL if the current thread is exiting which 2291 // should not happen since we're trying to post an event 2292 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 2293 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 2294 guarantee(collector != NULL, "attempt to register stub without event collector"); 2295 collector->register_stub(name, code_begin, code_end); 2296 } 2297 2298 // Collect all the vm internally allocated objects which are visible to java world 2299 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 2300 Thread* thread = Thread::current_or_null(); 2301 if (thread != NULL && thread->is_Java_thread()) { 2302 // Can not take safepoint here. 2303 NoSafepointVerifier no_sfpt; 2304 // Cannot take safepoint here so do not use state_for to get 2305 // jvmti thread state. 2306 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2307 if (state != NULL) { 2308 // state is non NULL when VMObjectAllocEventCollector is enabled. 2309 JvmtiVMObjectAllocEventCollector *collector; 2310 collector = state->get_vm_object_alloc_event_collector(); 2311 if (collector != NULL && collector->is_enabled()) { 2312 // Don't record classes as these will be notified via the ClassLoad 2313 // event. 2314 if (obj->klass() != SystemDictionary::Class_klass()) { 2315 collector->record_allocation(obj); 2316 } 2317 } 2318 } 2319 } 2320 } 2321 2322 // Collect all the sampled allocated objects. 2323 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) { 2324 Thread* thread = Thread::current_or_null(); 2325 if (thread != NULL && thread->is_Java_thread()) { 2326 // Can not take safepoint here. 2327 NoSafepointVerifier no_sfpt; 2328 // Cannot take safepoint here so do not use state_for to get 2329 // jvmti thread state. 2330 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2331 if (state != NULL) { 2332 // state is non NULL when SampledObjectAllocEventCollector is enabled. 2333 JvmtiSampledObjectAllocEventCollector *collector; 2334 collector = state->get_sampled_object_alloc_event_collector(); 2335 2336 if (collector != NULL && collector->is_enabled()) { 2337 collector->record_allocation(obj); 2338 } 2339 } 2340 } 2341 } 2342 2343 void JvmtiExport::post_garbage_collection_finish() { 2344 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 2345 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2346 ("[%s] garbage collection finish event triggered", 2347 JvmtiTrace::safe_get_thread_name(thread))); 2348 JvmtiEnvIterator it; 2349 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2350 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 2351 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2352 ("[%s] garbage collection finish event sent", 2353 JvmtiTrace::safe_get_thread_name(thread))); 2354 JvmtiThreadEventTransition jet(thread); 2355 // JNIEnv is NULL here because this event is posted from VM Thread 2356 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 2357 if (callback != NULL) { 2358 (*callback)(env->jvmti_external()); 2359 } 2360 } 2361 } 2362 } 2363 2364 void JvmtiExport::post_garbage_collection_start() { 2365 Thread* thread = Thread::current(); // this event is posted from vm-thread. 2366 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2367 ("[%s] garbage collection start event triggered", 2368 JvmtiTrace::safe_get_thread_name(thread))); 2369 JvmtiEnvIterator it; 2370 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2371 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 2372 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2373 ("[%s] garbage collection start event sent", 2374 JvmtiTrace::safe_get_thread_name(thread))); 2375 JvmtiThreadEventTransition jet(thread); 2376 // JNIEnv is NULL here because this event is posted from VM Thread 2377 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 2378 if (callback != NULL) { 2379 (*callback)(env->jvmti_external()); 2380 } 2381 } 2382 } 2383 } 2384 2385 void JvmtiExport::post_data_dump() { 2386 Thread *thread = Thread::current(); 2387 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2388 ("[%s] data dump request event triggered", 2389 JvmtiTrace::safe_get_thread_name(thread))); 2390 JvmtiEnvIterator it; 2391 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2392 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 2393 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2394 ("[%s] data dump request event sent", 2395 JvmtiTrace::safe_get_thread_name(thread))); 2396 JvmtiThreadEventTransition jet(thread); 2397 // JNIEnv is NULL here because this event is posted from VM Thread 2398 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 2399 if (callback != NULL) { 2400 (*callback)(env->jvmti_external()); 2401 } 2402 } 2403 } 2404 } 2405 2406 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 2407 oop object = (oop)obj_mntr->object(); 2408 JvmtiThreadState *state = thread->jvmti_thread_state(); 2409 if (state == NULL) { 2410 return; 2411 } 2412 2413 HandleMark hm(thread); 2414 Handle h(thread, object); 2415 2416 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2417 ("[%s] monitor contended enter event triggered", 2418 JvmtiTrace::safe_get_thread_name(thread))); 2419 2420 JvmtiEnvThreadStateIterator it(state); 2421 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2422 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2423 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2424 ("[%s] monitor contended enter event sent", 2425 JvmtiTrace::safe_get_thread_name(thread))); 2426 JvmtiMonitorEventMark jem(thread, h()); 2427 JvmtiEnv *env = ets->get_env(); 2428 JvmtiThreadEventTransition jet(thread); 2429 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2430 if (callback != NULL) { 2431 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2432 } 2433 } 2434 } 2435 } 2436 2437 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2438 oop object = (oop)obj_mntr->object(); 2439 JvmtiThreadState *state = thread->jvmti_thread_state(); 2440 if (state == NULL) { 2441 return; 2442 } 2443 2444 HandleMark hm(thread); 2445 Handle h(thread, object); 2446 2447 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2448 ("[%s] monitor contended entered event triggered", 2449 JvmtiTrace::safe_get_thread_name(thread))); 2450 2451 JvmtiEnvThreadStateIterator it(state); 2452 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2453 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2454 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2455 ("[%s] monitor contended enter event sent", 2456 JvmtiTrace::safe_get_thread_name(thread))); 2457 JvmtiMonitorEventMark jem(thread, h()); 2458 JvmtiEnv *env = ets->get_env(); 2459 JvmtiThreadEventTransition jet(thread); 2460 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2461 if (callback != NULL) { 2462 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2463 } 2464 } 2465 } 2466 } 2467 2468 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2469 jlong timeout) { 2470 JvmtiThreadState *state = thread->jvmti_thread_state(); 2471 if (state == NULL) { 2472 return; 2473 } 2474 2475 HandleMark hm(thread); 2476 Handle h(thread, object); 2477 2478 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2479 ("[%s] monitor wait event triggered", 2480 JvmtiTrace::safe_get_thread_name(thread))); 2481 2482 JvmtiEnvThreadStateIterator it(state); 2483 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2484 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2485 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2486 ("[%s] monitor wait event sent", 2487 JvmtiTrace::safe_get_thread_name(thread))); 2488 JvmtiMonitorEventMark jem(thread, h()); 2489 JvmtiEnv *env = ets->get_env(); 2490 JvmtiThreadEventTransition jet(thread); 2491 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2492 if (callback != NULL) { 2493 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2494 jem.jni_object(), timeout); 2495 } 2496 } 2497 } 2498 } 2499 2500 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2501 oop object = (oop)obj_mntr->object(); 2502 JvmtiThreadState *state = thread->jvmti_thread_state(); 2503 if (state == NULL) { 2504 return; 2505 } 2506 2507 HandleMark hm(thread); 2508 Handle h(thread, object); 2509 2510 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2511 ("[%s] monitor waited event triggered", 2512 JvmtiTrace::safe_get_thread_name(thread))); 2513 2514 JvmtiEnvThreadStateIterator it(state); 2515 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2516 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2517 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2518 ("[%s] monitor waited event sent", 2519 JvmtiTrace::safe_get_thread_name(thread))); 2520 JvmtiMonitorEventMark jem(thread, h()); 2521 JvmtiEnv *env = ets->get_env(); 2522 JvmtiThreadEventTransition jet(thread); 2523 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2524 if (callback != NULL) { 2525 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2526 jem.jni_object(), timed_out); 2527 } 2528 } 2529 } 2530 } 2531 2532 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2533 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered", 2534 JvmtiTrace::safe_get_thread_name(thread))); 2535 if (object == NULL) { 2536 return; 2537 } 2538 HandleMark hm(thread); 2539 Handle h(thread, object); 2540 JvmtiEnvIterator it; 2541 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2542 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2543 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s", 2544 JvmtiTrace::safe_get_thread_name(thread), 2545 object==NULL? "NULL" : object->klass()->external_name())); 2546 2547 JvmtiObjectAllocEventMark jem(thread, h()); 2548 JvmtiJavaThreadEventTransition jet(thread); 2549 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2550 if (callback != NULL) { 2551 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2552 jem.jni_jobject(), jem.jni_class(), jem.size()); 2553 } 2554 } 2555 } 2556 } 2557 2558 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) { 2559 JvmtiThreadState *state = thread->jvmti_thread_state(); 2560 if (state == NULL) { 2561 return; 2562 } 2563 2564 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2565 ("[%s] Trg sampled object alloc triggered", 2566 JvmtiTrace::safe_get_thread_name(thread))); 2567 if (object == NULL) { 2568 return; 2569 } 2570 HandleMark hm(thread); 2571 Handle h(thread, object); 2572 2573 JvmtiEnvThreadStateIterator it(state); 2574 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2575 if (ets->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) { 2576 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2577 ("[%s] Evt sampled object alloc sent %s", 2578 JvmtiTrace::safe_get_thread_name(thread), 2579 object == NULL ? "NULL" : object->klass()->external_name())); 2580 2581 JvmtiEnv *env = ets->get_env(); 2582 JvmtiObjectAllocEventMark jem(thread, h()); 2583 JvmtiJavaThreadEventTransition jet(thread); 2584 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc; 2585 if (callback != NULL) { 2586 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2587 jem.jni_jobject(), jem.jni_class(), jem.size()); 2588 } 2589 } 2590 } 2591 } 2592 2593 //////////////////////////////////////////////////////////////////////////////////////////////// 2594 2595 void JvmtiExport::cleanup_thread(JavaThread* thread) { 2596 assert(JavaThread::current() == thread, "thread is not current"); 2597 MutexLocker mu(thread, JvmtiThreadState_lock); 2598 2599 if (thread->jvmti_thread_state() != NULL) { 2600 // This has to happen after the thread state is removed, which is 2601 // why it is not in post_thread_end_event like its complement 2602 // Maybe both these functions should be rolled into the posts? 2603 JvmtiEventController::thread_ended(thread); 2604 } 2605 } 2606 2607 void JvmtiExport::clear_detected_exception(JavaThread* thread) { 2608 assert(JavaThread::current() == thread, "thread is not current"); 2609 2610 JvmtiThreadState* state = thread->jvmti_thread_state(); 2611 if (state != NULL) { 2612 state->clear_exception_state(); 2613 } 2614 } 2615 2616 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { 2617 JvmtiTagMap::weak_oops_do(is_alive, f); 2618 } 2619 2620 // Onload raw monitor transition. 2621 void JvmtiExport::transition_pending_onload_raw_monitors() { 2622 JvmtiPendingMonitors::transition_raw_monitors(); 2623 } 2624 2625 //////////////////////////////////////////////////////////////////////////////////////////////// 2626 #if INCLUDE_SERVICES 2627 // Attach is disabled if SERVICES is not included 2628 2629 // type for the Agent_OnAttach entry point 2630 extern "C" { 2631 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2632 } 2633 2634 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam, 2635 const char *options, outputStream* st) { 2636 char ebuf[1024] = {0}; 2637 char buffer[JVM_MAXPATHLEN]; 2638 void* library = NULL; 2639 jint result = JNI_ERR; 2640 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2641 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols); 2642 2643 // The abs paramter should be "true" or "false" 2644 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2645 2646 // Initially marked as invalid. It will be set to valid if we can find the agent 2647 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL); 2648 2649 // Check for statically linked in agent. If not found then if the path is 2650 // absolute we attempt to load the library. Otherwise we try to load it 2651 // from the standard dll directory. 2652 2653 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) { 2654 if (is_absolute_path) { 2655 library = os::dll_load(agent, ebuf, sizeof ebuf); 2656 } else { 2657 // Try to load the agent from the standard dll directory 2658 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(), 2659 agent)) { 2660 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2661 } 2662 if (library == NULL) { 2663 // not found - try OS default library path 2664 if (os::dll_build_name(buffer, sizeof(buffer), agent)) { 2665 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2666 } 2667 } 2668 } 2669 if (library != NULL) { 2670 agent_lib->set_os_lib(library); 2671 agent_lib->set_valid(); 2672 } 2673 } 2674 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2675 // function 2676 if (agent_lib->valid()) { 2677 // Lookup the Agent_OnAttach function 2678 OnAttachEntry_t on_attach_entry = NULL; 2679 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, 2680 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries)); 2681 if (on_attach_entry == NULL) { 2682 // Agent_OnAttach missing - unload library 2683 if (!agent_lib->is_static_lib()) { 2684 os::dll_unload(library); 2685 } 2686 st->print_cr("%s is not available in %s", 2687 on_attach_symbols[0], agent_lib->name()); 2688 delete agent_lib; 2689 } else { 2690 // Invoke the Agent_OnAttach function 2691 JavaThread* THREAD = JavaThread::current(); 2692 { 2693 extern struct JavaVM_ main_vm; 2694 JvmtiThreadEventMark jem(THREAD); 2695 JvmtiJavaThreadEventTransition jet(THREAD); 2696 2697 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2698 } 2699 2700 // Agent_OnAttach may have used JNI 2701 if (HAS_PENDING_EXCEPTION) { 2702 CLEAR_PENDING_EXCEPTION; 2703 } 2704 2705 // If OnAttach returns JNI_OK then we add it to the list of 2706 // agent libraries so that we can call Agent_OnUnload later. 2707 if (result == JNI_OK) { 2708 Arguments::add_loaded_agent(agent_lib); 2709 } else { 2710 delete agent_lib; 2711 } 2712 2713 // Agent_OnAttach executed so completion status is JNI_OK 2714 st->print_cr("return code: %d", result); 2715 result = JNI_OK; 2716 } 2717 } else { 2718 st->print_cr("%s was not loaded.", agent); 2719 if (*ebuf != '\0') { 2720 st->print_cr("%s", ebuf); 2721 } 2722 } 2723 return result; 2724 } 2725 2726 #endif // INCLUDE_SERVICES 2727 //////////////////////////////////////////////////////////////////////////////////////////////// 2728 2729 // Setup current current thread for event collection. 2730 void JvmtiEventCollector::setup_jvmti_thread_state() { 2731 // set this event collector to be the current one. 2732 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2733 // state can only be NULL if the current thread is exiting which 2734 // should not happen since we're trying to configure for event collection 2735 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2736 if (is_vm_object_alloc_event()) { 2737 JvmtiVMObjectAllocEventCollector *prev = state->get_vm_object_alloc_event_collector(); 2738 2739 // If we have a previous collector and it is disabled, it means this allocation came from a 2740 // callback induced VM Object allocation, do not register this collector then. 2741 if (prev && !prev->is_enabled()) { 2742 return; 2743 } 2744 _prev = prev; 2745 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2746 } else if (is_dynamic_code_event()) { 2747 _prev = state->get_dynamic_code_event_collector(); 2748 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2749 } else if (is_sampled_object_alloc_event()) { 2750 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector(); 2751 2752 if (prev) { 2753 // JvmtiSampledObjectAllocEventCollector wants only one active collector 2754 // enabled. This allows to have a collector detect a user code requiring 2755 // a sample in the callback. 2756 return; 2757 } 2758 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this); 2759 } 2760 2761 _unset_jvmti_thread_state = true; 2762 } 2763 2764 // Unset current event collection in this thread and reset it with previous 2765 // collector. 2766 void JvmtiEventCollector::unset_jvmti_thread_state() { 2767 if (!_unset_jvmti_thread_state) { 2768 return; 2769 } 2770 2771 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2772 if (state != NULL) { 2773 // restore the previous event collector (if any) 2774 if (is_vm_object_alloc_event()) { 2775 if (state->get_vm_object_alloc_event_collector() == this) { 2776 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2777 } else { 2778 // this thread's jvmti state was created during the scope of 2779 // the event collector. 2780 } 2781 } else if (is_dynamic_code_event()) { 2782 if (state->get_dynamic_code_event_collector() == this) { 2783 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2784 } else { 2785 // this thread's jvmti state was created during the scope of 2786 // the event collector. 2787 } 2788 } else if (is_sampled_object_alloc_event()) { 2789 if (state->get_sampled_object_alloc_event_collector() == this) { 2790 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev); 2791 } else { 2792 // this thread's jvmti state was created during the scope of 2793 // the event collector. 2794 } 2795 } 2796 } 2797 } 2798 2799 // create the dynamic code event collector 2800 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2801 if (JvmtiExport::should_post_dynamic_code_generated()) { 2802 setup_jvmti_thread_state(); 2803 } 2804 } 2805 2806 // iterate over any code blob descriptors collected and post a 2807 // DYNAMIC_CODE_GENERATED event to the profiler. 2808 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2809 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2810 // iterate over any code blob descriptors that we collected 2811 if (_code_blobs != NULL) { 2812 for (int i=0; i<_code_blobs->length(); i++) { 2813 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2814 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2815 FreeHeap(blob); 2816 } 2817 delete _code_blobs; 2818 } 2819 unset_jvmti_thread_state(); 2820 } 2821 2822 // register a stub 2823 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2824 if (_code_blobs == NULL) { 2825 _code_blobs = new (ResourceObj::C_HEAP, mtServiceability) GrowableArray<JvmtiCodeBlobDesc*>(1, mtServiceability); 2826 } 2827 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2828 } 2829 2830 // Setup current thread to record vm allocated objects. 2831 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() : 2832 _allocated(NULL), _enable(false), _post_callback(NULL) { 2833 } 2834 2835 // Post vm_object_alloc event for vm allocated objects visible to java 2836 // world. 2837 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() { 2838 if (_allocated) { 2839 set_enabled(false); 2840 for (int i = 0; i < _allocated->length(); i++) { 2841 oop obj = _allocated->at(i).resolve(); 2842 _post_callback(JavaThread::current(), obj); 2843 // Release OopHandle 2844 _allocated->at(i).release(JvmtiExport::jvmti_oop_storage()); 2845 2846 } 2847 delete _allocated, _allocated = NULL; 2848 } 2849 } 2850 2851 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) { 2852 assert(is_enabled(), "Object alloc event collector is not enabled"); 2853 if (_allocated == NULL) { 2854 _allocated = new (ResourceObj::C_HEAP, mtServiceability) GrowableArray<OopHandle>(1, mtServiceability); 2855 } 2856 _allocated->push(OopHandle(JvmtiExport::jvmti_oop_storage(), obj)); 2857 } 2858 2859 // Disable collection of VMObjectAlloc events 2860 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2861 // a no-op if VMObjectAlloc event is not enabled 2862 if (!JvmtiExport::should_post_vm_object_alloc()) { 2863 return; 2864 } 2865 Thread* thread = Thread::current_or_null(); 2866 if (thread != NULL && thread->is_Java_thread()) { 2867 JavaThread* current_thread = (JavaThread*)thread; 2868 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2869 if (state != NULL) { 2870 JvmtiVMObjectAllocEventCollector *collector; 2871 collector = state->get_vm_object_alloc_event_collector(); 2872 if (collector != NULL && collector->is_enabled()) { 2873 _collector = collector; 2874 _collector->set_enabled(false); 2875 } 2876 } 2877 } 2878 } 2879 2880 // Re-Enable collection of VMObjectAlloc events (if previously enabled) 2881 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2882 if (was_enabled()) { 2883 _collector->set_enabled(true); 2884 } 2885 }; 2886 2887 // Setup current thread to record vm allocated objects. 2888 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() { 2889 if (JvmtiExport::should_post_vm_object_alloc()) { 2890 _enable = true; 2891 setup_jvmti_thread_state(); 2892 _post_callback = JvmtiExport::post_vm_object_alloc; 2893 } 2894 } 2895 2896 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2897 if (_enable) { 2898 generate_call_for_allocated(); 2899 } 2900 unset_jvmti_thread_state(); 2901 } 2902 2903 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() { 2904 Thread* thread = Thread::current(); 2905 // Really only sample allocations if this is a JavaThread and not the compiler 2906 // thread. 2907 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) { 2908 return false; 2909 } 2910 2911 if (MultiArray_lock->owner() == thread) { 2912 return false; 2913 } 2914 return true; 2915 } 2916 2917 // Setup current thread to record sampled allocated objects. 2918 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() { 2919 if (JvmtiExport::should_post_sampled_object_alloc()) { 2920 if (!object_alloc_is_safe_to_sample()) { 2921 return; 2922 } 2923 2924 _enable = true; 2925 setup_jvmti_thread_state(); 2926 _post_callback = JvmtiExport::post_sampled_object_alloc; 2927 } 2928 } 2929 2930 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() { 2931 if (!_enable) { 2932 return; 2933 } 2934 2935 generate_call_for_allocated(); 2936 unset_jvmti_thread_state(); 2937 2938 // Unset the sampling collector as present in assertion mode only. 2939 assert(Thread::current()->is_Java_thread(), 2940 "Should always be in a Java thread"); 2941 } 2942 2943 JvmtiGCMarker::JvmtiGCMarker() { 2944 // if there aren't any JVMTI environments then nothing to do 2945 if (!JvmtiEnv::environments_might_exist()) { 2946 return; 2947 } 2948 2949 if (JvmtiExport::should_post_garbage_collection_start()) { 2950 JvmtiExport::post_garbage_collection_start(); 2951 } 2952 2953 if (SafepointSynchronize::is_at_safepoint()) { 2954 // Do clean up tasks that need to be done at a safepoint 2955 JvmtiEnvBase::check_for_periodic_clean_up(); 2956 } 2957 } 2958 2959 JvmtiGCMarker::~JvmtiGCMarker() { 2960 // if there aren't any JVMTI environments then nothing to do 2961 if (!JvmtiEnv::environments_might_exist()) { 2962 return; 2963 } 2964 2965 // JVMTI notify gc finish 2966 if (JvmtiExport::should_post_garbage_collection_finish()) { 2967 JvmtiExport::post_garbage_collection_finish(); 2968 } 2969 }