1 /* 2 * Copyright (c) 2003, 2016, 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/systemDictionary.hpp" 27 #include "code/nmethod.hpp" 28 #include "code/pcDesc.hpp" 29 #include "code/scopeDesc.hpp" 30 #include "interpreter/interpreter.hpp" 31 #include "jvmtifiles/jvmtiEnv.hpp" 32 #include "logging/log.hpp" 33 #include "logging/logStream.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "oops/objArrayKlass.hpp" 36 #include "oops/objArrayOop.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "prims/jvmtiCodeBlobEvents.hpp" 39 #include "prims/jvmtiEventController.hpp" 40 #include "prims/jvmtiEventController.inline.hpp" 41 #include "prims/jvmtiExport.hpp" 42 #include "prims/jvmtiImpl.hpp" 43 #include "prims/jvmtiManageCapabilities.hpp" 44 #include "prims/jvmtiRawMonitor.hpp" 45 #include "prims/jvmtiRedefineClasses.hpp" 46 #include "prims/jvmtiTagMap.hpp" 47 #include "prims/jvmtiThreadState.inline.hpp" 48 #include "runtime/arguments.hpp" 49 #include "runtime/handles.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/javaCalls.hpp" 52 #include "runtime/objectMonitor.hpp" 53 #include "runtime/objectMonitor.inline.hpp" 54 #include "runtime/os.inline.hpp" 55 #include "runtime/thread.inline.hpp" 56 #include "runtime/vframe.hpp" 57 #include "services/attachListener.hpp" 58 #include "services/serviceUtil.hpp" 59 #include "utilities/macros.hpp" 60 #if INCLUDE_ALL_GCS 61 #include "gc/parallel/psMarkSweep.hpp" 62 #endif // INCLUDE_ALL_GCS 63 64 #ifdef JVMTI_TRACE 65 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 66 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 67 #else 68 #define EVT_TRIG_TRACE(evt,out) 69 #define EVT_TRACE(evt,out) 70 #endif 71 72 /////////////////////////////////////////////////////////////// 73 // 74 // JvmtiEventTransition 75 // 76 // TO DO -- 77 // more handle purging 78 79 // Use this for JavaThreads and state is _thread_in_vm. 80 class JvmtiJavaThreadEventTransition : StackObj { 81 private: 82 ResourceMark _rm; 83 ThreadToNativeFromVM _transition; 84 HandleMark _hm; 85 86 public: 87 JvmtiJavaThreadEventTransition(JavaThread *thread) : 88 _rm(), 89 _transition(thread), 90 _hm(thread) {}; 91 }; 92 93 // For JavaThreads which are not in _thread_in_vm state 94 // and other system threads use this. 95 class JvmtiThreadEventTransition : StackObj { 96 private: 97 ResourceMark _rm; 98 HandleMark _hm; 99 JavaThreadState _saved_state; 100 JavaThread *_jthread; 101 102 public: 103 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { 104 if (thread->is_Java_thread()) { 105 _jthread = (JavaThread *)thread; 106 _saved_state = _jthread->thread_state(); 107 if (_saved_state == _thread_in_Java) { 108 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 109 } else { 110 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 111 } 112 } else { 113 _jthread = NULL; 114 } 115 } 116 117 ~JvmtiThreadEventTransition() { 118 if (_jthread != NULL) 119 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 120 } 121 }; 122 123 124 /////////////////////////////////////////////////////////////// 125 // 126 // JvmtiEventMark 127 // 128 129 class JvmtiEventMark : public StackObj { 130 private: 131 JavaThread *_thread; 132 JNIEnv* _jni_env; 133 JvmtiThreadState::ExceptionState _exception_state; 134 #if 0 135 JNIHandleBlock* _hblock; 136 #endif 137 138 public: 139 JvmtiEventMark(JavaThread *thread) : _thread(thread), 140 _jni_env(thread->jni_environment()) { 141 #if 0 142 _hblock = thread->active_handles(); 143 _hblock->clear_thoroughly(); // so we can be safe 144 #else 145 // we want to use the code above - but that needs the JNIHandle changes - later... 146 // for now, steal JNI push local frame code 147 JvmtiThreadState *state = thread->jvmti_thread_state(); 148 // we are before an event. 149 // Save current jvmti thread exception state. 150 if (state != NULL) { 151 state->save_exception_state(&_exception_state); 152 } 153 else { 154 // For safety ... 155 _exception_state = JvmtiThreadState::ES_CLEARED; 156 } 157 158 JNIHandleBlock* old_handles = thread->active_handles(); 159 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 160 assert(new_handles != NULL, "should not be NULL"); 161 new_handles->set_pop_frame_link(old_handles); 162 thread->set_active_handles(new_handles); 163 #endif 164 assert(thread == JavaThread::current(), "thread must be current!"); 165 thread->frame_anchor()->make_walkable(thread); 166 }; 167 168 ~JvmtiEventMark() { 169 #if 0 170 _hblock->clear(); // for consistency with future correct behavior 171 #else 172 // we want to use the code above - but that needs the JNIHandle changes - later... 173 // for now, steal JNI pop local frame code 174 JNIHandleBlock* old_handles = _thread->active_handles(); 175 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 176 assert(new_handles != NULL, "should not be NULL"); 177 _thread->set_active_handles(new_handles); 178 // Note that we set the pop_frame_link to NULL explicitly, otherwise 179 // the release_block call will release the blocks. 180 old_handles->set_pop_frame_link(NULL); 181 JNIHandleBlock::release_block(old_handles, _thread); // may block 182 #endif 183 184 JvmtiThreadState* state = _thread->jvmti_thread_state(); 185 // we are continuing after an event. 186 if (state != NULL) { 187 // Restore the jvmti thread exception state. 188 state->restore_exception_state(_exception_state); 189 } 190 } 191 192 #if 0 193 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 194 #else 195 // we want to use the code above - but that needs the JNIHandle changes - later... 196 // for now, use regular make_local 197 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 198 #endif 199 200 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); } 201 202 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); } 203 204 JNIEnv* jni_env() { return _jni_env; } 205 }; 206 207 class JvmtiThreadEventMark : public JvmtiEventMark { 208 private: 209 jthread _jt; 210 211 public: 212 JvmtiThreadEventMark(JavaThread *thread) : 213 JvmtiEventMark(thread) { 214 _jt = (jthread)(to_jobject(thread->threadObj())); 215 }; 216 jthread jni_thread() { return _jt; } 217 }; 218 219 class JvmtiClassEventMark : public JvmtiThreadEventMark { 220 private: 221 jclass _jc; 222 223 public: 224 JvmtiClassEventMark(JavaThread *thread, Klass* klass) : 225 JvmtiThreadEventMark(thread) { 226 _jc = to_jclass(klass); 227 }; 228 jclass jni_class() { return _jc; } 229 }; 230 231 class JvmtiMethodEventMark : public JvmtiThreadEventMark { 232 private: 233 jmethodID _mid; 234 235 public: 236 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) : 237 JvmtiThreadEventMark(thread), 238 _mid(to_jmethodID(method)) {}; 239 jmethodID jni_methodID() { return _mid; } 240 }; 241 242 class JvmtiLocationEventMark : public JvmtiMethodEventMark { 243 private: 244 jlocation _loc; 245 246 public: 247 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) : 248 JvmtiMethodEventMark(thread, method), 249 _loc(location - method->code_base()) {}; 250 jlocation location() { return _loc; } 251 }; 252 253 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 254 private: 255 jobject _exc; 256 257 public: 258 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) : 259 JvmtiLocationEventMark(thread, method, location), 260 _exc(to_jobject(exception())) {}; 261 jobject exception() { return _exc; } 262 }; 263 264 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 265 private: 266 const char *_class_name; 267 jobject _jloader; 268 jobject _protection_domain; 269 jclass _class_being_redefined; 270 271 public: 272 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 273 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) { 274 _class_name = name != NULL? name->as_utf8() : NULL; 275 _jloader = (jobject)to_jobject(class_loader()); 276 _protection_domain = (jobject)to_jobject(prot_domain()); 277 if (class_being_redefined == NULL) { 278 _class_being_redefined = NULL; 279 } else { 280 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)()); 281 } 282 }; 283 const char *class_name() { 284 return _class_name; 285 } 286 jobject jloader() { 287 return _jloader; 288 } 289 jobject protection_domain() { 290 return _protection_domain; 291 } 292 jclass class_being_redefined() { 293 return _class_being_redefined; 294 } 295 }; 296 297 ////////////////////////////////////////////////////////////////////////////// 298 299 int JvmtiExport::_field_access_count = 0; 300 int JvmtiExport::_field_modification_count = 0; 301 302 bool JvmtiExport::_can_access_local_variables = false; 303 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 304 bool JvmtiExport::_can_modify_any_class = false; 305 bool JvmtiExport::_can_walk_any_space = false; 306 307 bool JvmtiExport::_has_redefined_a_class = false; 308 bool JvmtiExport::_all_dependencies_are_recorded = false; 309 310 // 311 // field access management 312 // 313 314 // interpreter generator needs the address of the counter 315 address JvmtiExport::get_field_access_count_addr() { 316 // We don't grab a lock because we don't want to 317 // serialize field access between all threads. This means that a 318 // thread on another processor can see the wrong count value and 319 // may either miss making a needed call into post_field_access() 320 // or will make an unneeded call into post_field_access(). We pay 321 // this price to avoid slowing down the VM when we aren't watching 322 // field accesses. 323 // Other access/mutation safe by virtue of being in VM state. 324 return (address)(&_field_access_count); 325 } 326 327 // 328 // field modification management 329 // 330 331 // interpreter generator needs the address of the counter 332 address JvmtiExport::get_field_modification_count_addr() { 333 // We don't grab a lock because we don't 334 // want to serialize field modification between all threads. This 335 // means that a thread on another processor can see the wrong 336 // count value and may either miss making a needed call into 337 // post_field_modification() or will make an unneeded call into 338 // post_field_modification(). We pay this price to avoid slowing 339 // down the VM when we aren't watching field modifications. 340 // Other access/mutation safe by virtue of being in VM state. 341 return (address)(&_field_modification_count); 342 } 343 344 345 /////////////////////////////////////////////////////////////// 346 // Functions needed by java.lang.instrument for starting up javaagent. 347 /////////////////////////////////////////////////////////////// 348 349 jint 350 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 351 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 352 // has already been validated in JNI GetEnv(). 353 int major, minor, micro; 354 355 // micro version doesn't matter here (yet?) 356 decode_version_values(version, &major, &minor, µ); 357 switch (major) { 358 case 1: 359 switch (minor) { 360 case 0: // version 1.0.<micro> is recognized 361 case 1: // version 1.1.<micro> is recognized 362 case 2: // version 1.2.<micro> is recognized 363 break; 364 365 default: 366 return JNI_EVERSION; // unsupported minor version number 367 } 368 break; 369 case 9: 370 switch (minor) { 371 case 0: // version 9.0.<micro> is recognized 372 break; 373 default: 374 return JNI_EVERSION; // unsupported minor version number 375 } 376 break; 377 default: 378 return JNI_EVERSION; // unsupported major version number 379 } 380 381 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 382 JavaThread* current_thread = JavaThread::current(); 383 // transition code: native to VM 384 ThreadInVMfromNative __tiv(current_thread); 385 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 386 debug_only(VMNativeEntryWrapper __vew;) 387 388 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 389 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 390 return JNI_OK; 391 392 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 393 // not live, no thread to transition 394 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 395 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 396 return JNI_OK; 397 398 } else { 399 // Called at the wrong time 400 *penv = NULL; 401 return JNI_EDETACHED; 402 } 403 } 404 405 void 406 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) { 407 if (!Universe::is_module_initialized()) { 408 return; // extra safety 409 } 410 assert(!h_module.is_null(), "module should always be set"); 411 412 // Invoke the transformedByAgent method 413 JavaValue result(T_VOID); 414 JavaCalls::call_static(&result, 415 SystemDictionary::module_Modules_klass(), 416 vmSymbols::transformedByAgent_name(), 417 vmSymbols::transformedByAgent_signature(), 418 h_module, 419 THREAD); 420 421 if (HAS_PENDING_EXCEPTION) { 422 LogTarget(Trace, jvmti) log; 423 LogStreamCHeap log_stream(log); 424 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 425 log_stream.cr(); 426 CLEAR_PENDING_EXCEPTION; 427 return; 428 } 429 } 430 431 void 432 JvmtiExport::decode_version_values(jint version, int * major, int * minor, 433 int * micro) { 434 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 435 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 436 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 437 } 438 439 void JvmtiExport::enter_primordial_phase() { 440 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 441 } 442 443 void JvmtiExport::enter_early_start_phase() { 444 JvmtiManageCapabilities::recompute_always_capabilities(); 445 set_early_vmstart_recorded(true); 446 } 447 448 void JvmtiExport::enter_start_phase() { 449 JvmtiManageCapabilities::recompute_always_capabilities(); 450 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 451 } 452 453 void JvmtiExport::enter_onload_phase() { 454 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 455 } 456 457 void JvmtiExport::enter_live_phase() { 458 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 459 } 460 461 // 462 // JVMTI events that the VM posts to the debugger and also startup agent 463 // and call the agent's premain() for java.lang.instrument. 464 // 465 466 void JvmtiExport::post_early_vm_start() { 467 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" )); 468 469 // can now enable some events 470 JvmtiEventController::vm_start(); 471 472 JvmtiEnvIterator it; 473 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 474 // Only early vmstart envs post early VMStart event 475 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 476 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" )); 477 JavaThread *thread = JavaThread::current(); 478 JvmtiThreadEventMark jem(thread); 479 JvmtiJavaThreadEventTransition jet(thread); 480 jvmtiEventVMStart callback = env->callbacks()->VMStart; 481 if (callback != NULL) { 482 (*callback)(env->jvmti_external(), jem.jni_env()); 483 } 484 } 485 } 486 } 487 488 void JvmtiExport::post_vm_start() { 489 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" )); 490 491 // can now enable some events 492 JvmtiEventController::vm_start(); 493 494 JvmtiEnvIterator it; 495 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 496 // Early vmstart envs do not post normal VMStart event 497 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 498 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" )); 499 500 JavaThread *thread = JavaThread::current(); 501 JvmtiThreadEventMark jem(thread); 502 JvmtiJavaThreadEventTransition jet(thread); 503 jvmtiEventVMStart callback = env->callbacks()->VMStart; 504 if (callback != NULL) { 505 (*callback)(env->jvmti_external(), jem.jni_env()); 506 } 507 } 508 } 509 } 510 511 512 void JvmtiExport::post_vm_initialized() { 513 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" )); 514 515 // can now enable events 516 JvmtiEventController::vm_init(); 517 518 JvmtiEnvIterator it; 519 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 520 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 521 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" )); 522 523 JavaThread *thread = JavaThread::current(); 524 JvmtiThreadEventMark jem(thread); 525 JvmtiJavaThreadEventTransition jet(thread); 526 jvmtiEventVMInit callback = env->callbacks()->VMInit; 527 if (callback != NULL) { 528 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 529 } 530 } 531 } 532 } 533 534 535 void JvmtiExport::post_vm_death() { 536 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" )); 537 538 JvmtiEnvIterator it; 539 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 540 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 541 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" )); 542 543 JavaThread *thread = JavaThread::current(); 544 JvmtiEventMark jem(thread); 545 JvmtiJavaThreadEventTransition jet(thread); 546 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 547 if (callback != NULL) { 548 (*callback)(env->jvmti_external(), jem.jni_env()); 549 } 550 } 551 } 552 553 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 554 JvmtiEventController::vm_death(); 555 } 556 557 char** 558 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 559 // Have to grab JVMTI thread state lock to be sure environment doesn't 560 // go away while we iterate them. No locks during VM bring-up. 561 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 562 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 563 } else { 564 MutexLocker mu(JvmtiThreadState_lock); 565 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 566 } 567 } 568 569 class JvmtiClassFileLoadHookPoster : public StackObj { 570 private: 571 Symbol* _h_name; 572 Handle _class_loader; 573 Handle _h_protection_domain; 574 unsigned char ** _data_ptr; 575 unsigned char ** _end_ptr; 576 JavaThread * _thread; 577 jint _curr_len; 578 unsigned char * _curr_data; 579 JvmtiEnv * _curr_env; 580 JvmtiCachedClassFileData ** _cached_class_file_ptr; 581 JvmtiThreadState * _state; 582 KlassHandle * _h_class_being_redefined; 583 JvmtiClassLoadKind _load_kind; 584 585 public: 586 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 587 Handle h_protection_domain, 588 unsigned char **data_ptr, unsigned char **end_ptr, 589 JvmtiCachedClassFileData **cache_ptr) { 590 _h_name = h_name; 591 _class_loader = class_loader; 592 _h_protection_domain = h_protection_domain; 593 _data_ptr = data_ptr; 594 _end_ptr = end_ptr; 595 _thread = JavaThread::current(); 596 _curr_len = *end_ptr - *data_ptr; 597 _curr_data = *data_ptr; 598 _curr_env = NULL; 599 _cached_class_file_ptr = cache_ptr; 600 601 _state = _thread->jvmti_thread_state(); 602 if (_state != NULL) { 603 _h_class_being_redefined = _state->get_class_being_redefined(); 604 _load_kind = _state->get_class_load_kind(); 605 Klass* klass = (_h_class_being_redefined == NULL) ? NULL : (*_h_class_being_redefined)(); 606 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) { 607 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module(); 608 assert(module_entry != NULL, "module_entry should always be set"); 609 if (module_entry->is_named() && 610 module_entry->module() != NULL && 611 !module_entry->has_default_read_edges()) { 612 if (!module_entry->set_has_default_read_edges()) { 613 // We won a potential race. 614 // Add read edges to the unnamed modules of the bootstrap and app class loaders 615 Handle class_module(_thread, JNIHandles::resolve(module_entry->module())); // Obtain j.l.r.Module 616 JvmtiExport::add_default_read_edges(class_module, _thread); 617 } 618 } 619 } 620 // Clear class_being_redefined flag here. The action 621 // from agent handler could generate a new class file load 622 // hook event and if it is not cleared the new event generated 623 // from regular class file load could have this stale redefined 624 // class handle info. 625 _state->clear_class_being_redefined(); 626 } else { 627 // redefine and retransform will always set the thread state 628 _h_class_being_redefined = (KlassHandle *) NULL; 629 _load_kind = jvmti_class_load_kind_load; 630 } 631 } 632 633 void post() { 634 post_all_envs(); 635 copy_modified_data(); 636 } 637 638 private: 639 void post_all_envs() { 640 if (_load_kind != jvmti_class_load_kind_retransform) { 641 // for class load and redefine, 642 // call the non-retransformable agents 643 JvmtiEnvIterator it; 644 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 645 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 646 // non-retransformable agents cannot retransform back, 647 // so no need to cache the original class file bytes 648 post_to_env(env, false); 649 } 650 } 651 } 652 JvmtiEnvIterator it; 653 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 654 // retransformable agents get all events 655 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 656 // retransformable agents need to cache the original class file 657 // bytes if changes are made via the ClassFileLoadHook 658 post_to_env(env, true); 659 } 660 } 661 } 662 663 void post_to_env(JvmtiEnv* env, bool caching_needed) { 664 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) { 665 return; 666 } 667 unsigned char *new_data = NULL; 668 jint new_len = 0; 669 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 670 _h_protection_domain, 671 _h_class_being_redefined); 672 JvmtiJavaThreadEventTransition jet(_thread); 673 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 674 if (callback != NULL) { 675 (*callback)(env->jvmti_external(), jem.jni_env(), 676 jem.class_being_redefined(), 677 jem.jloader(), jem.class_name(), 678 jem.protection_domain(), 679 _curr_len, _curr_data, 680 &new_len, &new_data); 681 } 682 if (new_data != NULL) { 683 // this agent has modified class data. 684 if (caching_needed && *_cached_class_file_ptr == NULL) { 685 // data has been changed by the new retransformable agent 686 // and it hasn't already been cached, cache it 687 JvmtiCachedClassFileData *p; 688 p = (JvmtiCachedClassFileData *)os::malloc( 689 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal); 690 if (p == NULL) { 691 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len, 692 OOM_MALLOC_ERROR, 693 "unable to allocate cached copy of original class bytes"); 694 } 695 p->length = _curr_len; 696 memcpy(p->data, _curr_data, _curr_len); 697 *_cached_class_file_ptr = p; 698 } 699 700 if (_curr_data != *_data_ptr) { 701 // curr_data is previous agent modified class data. 702 // And this has been changed by the new agent so 703 // we can delete it now. 704 _curr_env->Deallocate(_curr_data); 705 } 706 707 // Class file data has changed by the current agent. 708 _curr_data = new_data; 709 _curr_len = new_len; 710 // Save the current agent env we need this to deallocate the 711 // memory allocated by this agent. 712 _curr_env = env; 713 } 714 } 715 716 void copy_modified_data() { 717 // if one of the agent has modified class file data. 718 // Copy modified class data to new resources array. 719 if (_curr_data != *_data_ptr) { 720 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 721 memcpy(*_data_ptr, _curr_data, _curr_len); 722 *_end_ptr = *_data_ptr + _curr_len; 723 _curr_env->Deallocate(_curr_data); 724 } 725 } 726 }; 727 728 bool JvmtiExport::_should_post_class_file_load_hook = false; 729 730 // this entry is for class file load hook on class load, redefine and retransform 731 void JvmtiExport::post_class_file_load_hook(Symbol* h_name, 732 Handle class_loader, 733 Handle h_protection_domain, 734 unsigned char **data_ptr, 735 unsigned char **end_ptr, 736 JvmtiCachedClassFileData **cache_ptr) { 737 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 738 return; 739 } 740 741 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 742 h_protection_domain, 743 data_ptr, end_ptr, 744 cache_ptr); 745 poster.post(); 746 } 747 748 void JvmtiExport::report_unsupported(bool on) { 749 // If any JVMTI service is turned on, we need to exit before native code 750 // tries to access nonexistant services. 751 if (on) { 752 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 753 } 754 } 755 756 757 static inline Klass* oop_to_klass(oop obj) { 758 Klass* k = obj->klass(); 759 760 // if the object is a java.lang.Class then return the java mirror 761 if (k == SystemDictionary::Class_klass()) { 762 if (!java_lang_Class::is_primitive(obj)) { 763 k = java_lang_Class::as_Klass(obj); 764 assert(k != NULL, "class for non-primitive mirror must exist"); 765 } 766 } 767 return k; 768 } 769 770 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark { 771 private: 772 jobject _jobj; 773 jlong _size; 774 public: 775 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) { 776 _jobj = (jobject)to_jobject(obj); 777 _size = obj->size() * wordSize; 778 }; 779 jobject jni_jobject() { return _jobj; } 780 jlong size() { return _size; } 781 }; 782 783 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 784 private: 785 jint _code_size; 786 const void *_code_data; 787 jint _map_length; 788 jvmtiAddrLocationMap *_map; 789 const void *_compile_info; 790 public: 791 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 792 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 793 _code_data = nm->insts_begin(); 794 _code_size = nm->insts_size(); 795 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 796 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 797 } 798 ~JvmtiCompiledMethodLoadEventMark() { 799 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); 800 } 801 802 jint code_size() { return _code_size; } 803 const void *code_data() { return _code_data; } 804 jint map_length() { return _map_length; } 805 const jvmtiAddrLocationMap* map() { return _map; } 806 const void *compile_info() { return _compile_info; } 807 }; 808 809 810 811 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 812 private: 813 jobject _jobj; 814 public: 815 JvmtiMonitorEventMark(JavaThread *thread, oop object) 816 : JvmtiThreadEventMark(thread){ 817 _jobj = to_jobject(object); 818 } 819 jobject jni_object() { return _jobj; } 820 }; 821 822 /////////////////////////////////////////////////////////////// 823 // 824 // pending CompiledMethodUnload support 825 // 826 827 void JvmtiExport::post_compiled_method_unload( 828 jmethodID method, const void *code_begin) { 829 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 830 return; 831 } 832 JavaThread* thread = JavaThread::current(); 833 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 834 ("[%s] method compile unload event triggered", 835 JvmtiTrace::safe_get_thread_name(thread))); 836 837 // post the event for each environment that has this event enabled. 838 JvmtiEnvIterator it; 839 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 840 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 841 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 842 continue; 843 } 844 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 845 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT, 846 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 847 848 ResourceMark rm(thread); 849 850 JvmtiEventMark jem(thread); 851 JvmtiJavaThreadEventTransition jet(thread); 852 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 853 if (callback != NULL) { 854 (*callback)(env->jvmti_external(), method, code_begin); 855 } 856 } 857 } 858 } 859 860 /////////////////////////////////////////////////////////////// 861 // 862 // JvmtiExport 863 // 864 865 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) { 866 HandleMark hm(thread); 867 methodHandle mh(thread, method); 868 869 JvmtiThreadState *state = thread->jvmti_thread_state(); 870 if (state == NULL) { 871 return; 872 } 873 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered", 874 JvmtiTrace::safe_get_thread_name(thread))); 875 JvmtiEnvThreadStateIterator it(state); 876 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 877 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 878 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 879 ThreadState old_os_state = thread->osthread()->get_state(); 880 thread->osthread()->set_state(BREAKPOINTED); 881 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT, 882 JvmtiTrace::safe_get_thread_name(thread), 883 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 884 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 885 location - mh()->code_base() )); 886 887 JvmtiEnv *env = ets->get_env(); 888 JvmtiLocationEventMark jem(thread, mh, location); 889 JvmtiJavaThreadEventTransition jet(thread); 890 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 891 if (callback != NULL) { 892 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 893 jem.jni_methodID(), jem.location()); 894 } 895 896 ets->set_breakpoint_posted(); 897 thread->osthread()->set_state(old_os_state); 898 } 899 } 900 } 901 902 ////////////////////////////////////////////////////////////////////////////// 903 904 bool JvmtiExport::_can_get_source_debug_extension = false; 905 bool JvmtiExport::_can_maintain_original_method_order = false; 906 bool JvmtiExport::_can_post_interpreter_events = false; 907 bool JvmtiExport::_can_post_on_exceptions = false; 908 bool JvmtiExport::_can_post_breakpoint = false; 909 bool JvmtiExport::_can_post_field_access = false; 910 bool JvmtiExport::_can_post_field_modification = false; 911 bool JvmtiExport::_can_post_method_entry = false; 912 bool JvmtiExport::_can_post_method_exit = false; 913 bool JvmtiExport::_can_pop_frame = false; 914 bool JvmtiExport::_can_force_early_return = false; 915 916 bool JvmtiExport::_early_vmstart_recorded = false; 917 918 bool JvmtiExport::_should_post_single_step = false; 919 bool JvmtiExport::_should_post_field_access = false; 920 bool JvmtiExport::_should_post_field_modification = false; 921 bool JvmtiExport::_should_post_class_load = false; 922 bool JvmtiExport::_should_post_class_prepare = false; 923 bool JvmtiExport::_should_post_class_unload = false; 924 bool JvmtiExport::_should_post_thread_life = false; 925 bool JvmtiExport::_should_clean_up_heap_objects = false; 926 bool JvmtiExport::_should_post_native_method_bind = false; 927 bool JvmtiExport::_should_post_dynamic_code_generated = false; 928 bool JvmtiExport::_should_post_data_dump = false; 929 bool JvmtiExport::_should_post_compiled_method_load = false; 930 bool JvmtiExport::_should_post_compiled_method_unload = false; 931 bool JvmtiExport::_should_post_monitor_contended_enter = false; 932 bool JvmtiExport::_should_post_monitor_contended_entered = false; 933 bool JvmtiExport::_should_post_monitor_wait = false; 934 bool JvmtiExport::_should_post_monitor_waited = false; 935 bool JvmtiExport::_should_post_garbage_collection_start = false; 936 bool JvmtiExport::_should_post_garbage_collection_finish = false; 937 bool JvmtiExport::_should_post_object_free = false; 938 bool JvmtiExport::_should_post_resource_exhausted = false; 939 bool JvmtiExport::_should_post_vm_object_alloc = false; 940 bool JvmtiExport::_should_post_on_exceptions = false; 941 942 //////////////////////////////////////////////////////////////////////////////////////////////// 943 944 945 // 946 // JVMTI single step management 947 // 948 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) { 949 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 950 951 HandleMark hm(thread); 952 methodHandle mh(thread, method); 953 954 // update information about current location and post a step event 955 JvmtiThreadState *state = thread->jvmti_thread_state(); 956 if (state == NULL) { 957 return; 958 } 959 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered", 960 JvmtiTrace::safe_get_thread_name(thread))); 961 if (!state->hide_single_stepping()) { 962 if (state->is_pending_step_for_popframe()) { 963 state->process_pending_step_for_popframe(); 964 } 965 if (state->is_pending_step_for_earlyret()) { 966 state->process_pending_step_for_earlyret(); 967 } 968 JvmtiExport::post_single_step(thread, mh(), location); 969 } 970 } 971 972 973 void JvmtiExport::expose_single_stepping(JavaThread *thread) { 974 JvmtiThreadState *state = thread->jvmti_thread_state(); 975 if (state != NULL) { 976 state->clear_hide_single_stepping(); 977 } 978 } 979 980 981 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 982 JvmtiThreadState *state = thread->jvmti_thread_state(); 983 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 984 state->set_hide_single_stepping(); 985 return true; 986 } else { 987 return false; 988 } 989 } 990 991 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) { 992 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 993 return; 994 } 995 HandleMark hm(thread); 996 KlassHandle kh(thread, klass); 997 998 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered", 999 JvmtiTrace::safe_get_thread_name(thread))); 1000 JvmtiThreadState* state = thread->jvmti_thread_state(); 1001 if (state == NULL) { 1002 return; 1003 } 1004 JvmtiEnvThreadStateIterator it(state); 1005 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1006 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 1007 JvmtiEnv *env = ets->get_env(); 1008 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1009 continue; 1010 } 1011 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s", 1012 JvmtiTrace::safe_get_thread_name(thread), 1013 kh()==NULL? "NULL" : kh()->external_name() )); 1014 JvmtiClassEventMark jem(thread, kh()); 1015 JvmtiJavaThreadEventTransition jet(thread); 1016 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 1017 if (callback != NULL) { 1018 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1019 } 1020 } 1021 } 1022 } 1023 1024 1025 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) { 1026 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1027 return; 1028 } 1029 HandleMark hm(thread); 1030 KlassHandle kh(thread, klass); 1031 1032 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered", 1033 JvmtiTrace::safe_get_thread_name(thread))); 1034 JvmtiThreadState* state = thread->jvmti_thread_state(); 1035 if (state == NULL) { 1036 return; 1037 } 1038 JvmtiEnvThreadStateIterator it(state); 1039 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1040 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 1041 JvmtiEnv *env = ets->get_env(); 1042 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1043 continue; 1044 } 1045 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s", 1046 JvmtiTrace::safe_get_thread_name(thread), 1047 kh()==NULL? "NULL" : kh()->external_name() )); 1048 JvmtiClassEventMark jem(thread, kh()); 1049 JvmtiJavaThreadEventTransition jet(thread); 1050 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 1051 if (callback != NULL) { 1052 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1053 } 1054 } 1055 } 1056 } 1057 1058 void JvmtiExport::post_class_unload(Klass* klass) { 1059 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1060 return; 1061 } 1062 Thread *thread = Thread::current(); 1063 HandleMark hm(thread); 1064 KlassHandle kh(thread, klass); 1065 1066 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" )); 1067 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1068 assert(thread->is_VM_thread(), "wrong thread"); 1069 1070 // get JavaThread for whom we are proxy 1071 JavaThread *real_thread = 1072 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread(); 1073 1074 JvmtiEnvIterator it; 1075 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1076 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1077 continue; 1078 } 1079 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1080 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s", 1081 kh()==NULL? "NULL" : kh()->external_name() )); 1082 1083 // do everything manually, since this is a proxy - needs special care 1084 JNIEnv* jni_env = real_thread->jni_environment(); 1085 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); 1086 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror()); 1087 1088 // Before we call the JVMTI agent, we have to set the state in the 1089 // thread for which we are proxying. 1090 JavaThreadState prev_state = real_thread->thread_state(); 1091 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() || 1092 (real_thread->is_Java_thread() && prev_state == _thread_blocked), 1093 "should be ConcurrentGCThread or JavaThread at safepoint"); 1094 real_thread->set_thread_state(_thread_in_native); 1095 1096 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 1097 if (callback != NULL) { 1098 (*callback)(env->jvmti_external(), jni_env, jt, jk); 1099 } 1100 1101 assert(real_thread->thread_state() == _thread_in_native, 1102 "JavaThread should be in native"); 1103 real_thread->set_thread_state(prev_state); 1104 1105 JNIHandles::destroy_local(jk); 1106 JNIHandles::destroy_local(jt); 1107 } 1108 } 1109 } 1110 } 1111 1112 1113 void JvmtiExport::post_thread_start(JavaThread *thread) { 1114 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1115 return; 1116 } 1117 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1118 1119 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered", 1120 JvmtiTrace::safe_get_thread_name(thread))); 1121 1122 // do JVMTI thread initialization (if needed) 1123 JvmtiEventController::thread_started(thread); 1124 1125 // Do not post thread start event for hidden java thread. 1126 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1127 !thread->is_hidden_from_external_view()) { 1128 JvmtiEnvIterator it; 1129 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1130 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1131 continue; 1132 } 1133 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1134 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent", 1135 JvmtiTrace::safe_get_thread_name(thread) )); 1136 1137 JvmtiThreadEventMark jem(thread); 1138 JvmtiJavaThreadEventTransition jet(thread); 1139 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1140 if (callback != NULL) { 1141 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1142 } 1143 } 1144 } 1145 } 1146 } 1147 1148 1149 void JvmtiExport::post_thread_end(JavaThread *thread) { 1150 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1151 return; 1152 } 1153 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered", 1154 JvmtiTrace::safe_get_thread_name(thread))); 1155 1156 JvmtiThreadState *state = thread->jvmti_thread_state(); 1157 if (state == NULL) { 1158 return; 1159 } 1160 1161 // Do not post thread end event for hidden java thread. 1162 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1163 !thread->is_hidden_from_external_view()) { 1164 1165 JvmtiEnvThreadStateIterator it(state); 1166 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1167 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1168 JvmtiEnv *env = ets->get_env(); 1169 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1170 continue; 1171 } 1172 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent", 1173 JvmtiTrace::safe_get_thread_name(thread) )); 1174 1175 JvmtiThreadEventMark jem(thread); 1176 JvmtiJavaThreadEventTransition jet(thread); 1177 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1178 if (callback != NULL) { 1179 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1180 } 1181 } 1182 } 1183 } 1184 } 1185 1186 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1187 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1188 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1189 1190 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" )); 1191 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent")); 1192 1193 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1194 if (callback != NULL) { 1195 (*callback)(env->jvmti_external(), tag); 1196 } 1197 } 1198 1199 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1200 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" )); 1201 1202 JvmtiEnvIterator it; 1203 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1204 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1205 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" )); 1206 1207 JavaThread *thread = JavaThread::current(); 1208 JvmtiThreadEventMark jem(thread); 1209 JvmtiJavaThreadEventTransition jet(thread); 1210 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1211 if (callback != NULL) { 1212 (*callback)(env->jvmti_external(), jem.jni_env(), 1213 resource_exhausted_flags, NULL, description); 1214 } 1215 } 1216 } 1217 } 1218 1219 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) { 1220 HandleMark hm(thread); 1221 methodHandle mh(thread, method); 1222 1223 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s", 1224 JvmtiTrace::safe_get_thread_name(thread), 1225 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1226 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1227 1228 JvmtiThreadState* state = thread->jvmti_thread_state(); 1229 if (state == NULL || !state->is_interp_only_mode()) { 1230 // for any thread that actually wants method entry, interp_only_mode is set 1231 return; 1232 } 1233 1234 state->incr_cur_stack_depth(); 1235 1236 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1237 JvmtiEnvThreadStateIterator it(state); 1238 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1239 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1240 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s", 1241 JvmtiTrace::safe_get_thread_name(thread), 1242 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1243 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1244 1245 JvmtiEnv *env = ets->get_env(); 1246 JvmtiMethodEventMark jem(thread, mh); 1247 JvmtiJavaThreadEventTransition jet(thread); 1248 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1249 if (callback != NULL) { 1250 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1251 } 1252 } 1253 } 1254 } 1255 } 1256 1257 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) { 1258 HandleMark hm(thread); 1259 methodHandle mh(thread, method); 1260 1261 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s", 1262 JvmtiTrace::safe_get_thread_name(thread), 1263 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1264 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1265 1266 JvmtiThreadState *state = thread->jvmti_thread_state(); 1267 if (state == NULL || !state->is_interp_only_mode()) { 1268 // for any thread that actually wants method exit, interp_only_mode is set 1269 return; 1270 } 1271 1272 // return a flag when a method terminates by throwing an exception 1273 // i.e. if an exception is thrown and it's not caught by the current method 1274 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1275 1276 1277 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1278 Handle result; 1279 jvalue value; 1280 value.j = 0L; 1281 1282 // if the method hasn't been popped because of an exception then we populate 1283 // the return_value parameter for the callback. At this point we only have 1284 // the address of a "raw result" and we just call into the interpreter to 1285 // convert this into a jvalue. 1286 if (!exception_exit) { 1287 oop oop_result; 1288 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1289 if (type == T_OBJECT || type == T_ARRAY) { 1290 result = Handle(thread, oop_result); 1291 } 1292 } 1293 1294 JvmtiEnvThreadStateIterator it(state); 1295 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1296 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1297 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s", 1298 JvmtiTrace::safe_get_thread_name(thread), 1299 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1300 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1301 1302 JvmtiEnv *env = ets->get_env(); 1303 JvmtiMethodEventMark jem(thread, mh); 1304 if (result.not_null()) { 1305 value.l = JNIHandles::make_local(thread, result()); 1306 } 1307 JvmtiJavaThreadEventTransition jet(thread); 1308 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1309 if (callback != NULL) { 1310 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1311 jem.jni_methodID(), exception_exit, value); 1312 } 1313 } 1314 } 1315 } 1316 1317 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1318 JvmtiEnvThreadStateIterator it(state); 1319 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1320 int cur_frame_number = state->cur_stack_depth(); 1321 1322 if (ets->is_frame_pop(cur_frame_number)) { 1323 // we have a NotifyFramePop entry for this frame. 1324 // now check that this env/thread wants this event 1325 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1326 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s", 1327 JvmtiTrace::safe_get_thread_name(thread), 1328 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1329 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1330 1331 // we also need to issue a frame pop event for this frame 1332 JvmtiEnv *env = ets->get_env(); 1333 JvmtiMethodEventMark jem(thread, mh); 1334 JvmtiJavaThreadEventTransition jet(thread); 1335 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1336 if (callback != NULL) { 1337 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1338 jem.jni_methodID(), exception_exit); 1339 } 1340 } 1341 // remove the frame's entry 1342 ets->clear_frame_pop(cur_frame_number); 1343 } 1344 } 1345 } 1346 1347 state->decr_cur_stack_depth(); 1348 } 1349 1350 1351 // Todo: inline this for optimization 1352 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) { 1353 HandleMark hm(thread); 1354 methodHandle mh(thread, method); 1355 1356 JvmtiThreadState *state = thread->jvmti_thread_state(); 1357 if (state == NULL) { 1358 return; 1359 } 1360 JvmtiEnvThreadStateIterator it(state); 1361 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1362 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1363 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1364 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT, 1365 JvmtiTrace::safe_get_thread_name(thread), 1366 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1367 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1368 location - mh()->code_base() )); 1369 1370 JvmtiEnv *env = ets->get_env(); 1371 JvmtiLocationEventMark jem(thread, mh, location); 1372 JvmtiJavaThreadEventTransition jet(thread); 1373 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1374 if (callback != NULL) { 1375 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1376 jem.jni_methodID(), jem.location()); 1377 } 1378 1379 ets->set_single_stepping_posted(); 1380 } 1381 } 1382 } 1383 1384 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) { 1385 HandleMark hm(thread); 1386 methodHandle mh(thread, method); 1387 Handle exception_handle(thread, exception); 1388 1389 JvmtiThreadState *state = thread->jvmti_thread_state(); 1390 if (state == NULL) { 1391 return; 1392 } 1393 1394 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered", 1395 JvmtiTrace::safe_get_thread_name(thread))); 1396 if (!state->is_exception_detected()) { 1397 state->set_exception_detected(); 1398 JvmtiEnvThreadStateIterator it(state); 1399 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1400 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1401 1402 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1403 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT, 1404 JvmtiTrace::safe_get_thread_name(thread), 1405 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1406 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1407 location - mh()->code_base() )); 1408 1409 JvmtiEnv *env = ets->get_env(); 1410 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1411 1412 // It's okay to clear these exceptions here because we duplicate 1413 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1414 EXCEPTION_MARK; 1415 1416 bool should_repeat; 1417 vframeStream st(thread); 1418 assert(!st.at_end(), "cannot be at end"); 1419 Method* current_method = NULL; 1420 // A GC may occur during the Method::fast_exception_handler_bci_for() 1421 // call below if it needs to load the constraint class. Using a 1422 // methodHandle to keep the 'current_method' from being deallocated 1423 // if GC happens. 1424 methodHandle current_mh = methodHandle(thread, current_method); 1425 int current_bci = -1; 1426 do { 1427 current_method = st.method(); 1428 current_mh = methodHandle(thread, current_method); 1429 current_bci = st.bci(); 1430 do { 1431 should_repeat = false; 1432 KlassHandle eh_klass(thread, exception_handle()->klass()); 1433 current_bci = Method::fast_exception_handler_bci_for( 1434 current_mh, eh_klass, current_bci, THREAD); 1435 if (HAS_PENDING_EXCEPTION) { 1436 exception_handle = Handle(thread, PENDING_EXCEPTION); 1437 CLEAR_PENDING_EXCEPTION; 1438 should_repeat = true; 1439 } 1440 } while (should_repeat && (current_bci != -1)); 1441 st.next(); 1442 } while ((current_bci < 0) && (!st.at_end())); 1443 1444 jmethodID catch_jmethodID; 1445 if (current_bci < 0) { 1446 catch_jmethodID = 0; 1447 current_bci = 0; 1448 } else { 1449 catch_jmethodID = jem.to_jmethodID(current_mh); 1450 } 1451 1452 JvmtiJavaThreadEventTransition jet(thread); 1453 jvmtiEventException callback = env->callbacks()->Exception; 1454 if (callback != NULL) { 1455 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1456 jem.jni_methodID(), jem.location(), 1457 jem.exception(), 1458 catch_jmethodID, current_bci); 1459 } 1460 } 1461 } 1462 } 1463 1464 // frames may get popped because of this throw, be safe - invalidate cached depth 1465 state->invalidate_cur_stack_depth(); 1466 } 1467 1468 1469 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) { 1470 HandleMark hm(thread); 1471 methodHandle mh(thread, method); 1472 Handle exception_handle(thread, exception); 1473 1474 JvmtiThreadState *state = thread->jvmti_thread_state(); 1475 if (state == NULL) { 1476 return; 1477 } 1478 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1479 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s", 1480 JvmtiTrace::safe_get_thread_name(thread), 1481 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1482 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1483 location==0? "no location:" : "", 1484 location==0? 0 : location - mh()->code_base(), 1485 in_handler_frame? "in handler frame" : "not handler frame" )); 1486 1487 if (state->is_exception_detected()) { 1488 1489 state->invalidate_cur_stack_depth(); 1490 if (!in_handler_frame) { 1491 // Not in exception handler. 1492 if(state->is_interp_only_mode()) { 1493 // method exit and frame pop events are posted only in interp mode. 1494 // When these events are enabled code should be in running in interp mode. 1495 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1496 // The cached cur_stack_depth might have changed from the 1497 // operations of frame pop or method exit. We are not 100% sure 1498 // the cached cur_stack_depth is still valid depth so invalidate 1499 // it. 1500 state->invalidate_cur_stack_depth(); 1501 } 1502 } else { 1503 // In exception handler frame. Report exception catch. 1504 assert(location != NULL, "must be a known location"); 1505 // Update cur_stack_depth - the frames above the current frame 1506 // have been unwound due to this exception: 1507 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1508 state->set_exception_caught(); 1509 1510 JvmtiEnvThreadStateIterator it(state); 1511 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1512 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1513 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1514 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT, 1515 JvmtiTrace::safe_get_thread_name(thread), 1516 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1517 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1518 location - mh()->code_base() )); 1519 1520 JvmtiEnv *env = ets->get_env(); 1521 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1522 JvmtiJavaThreadEventTransition jet(thread); 1523 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1524 if (callback != NULL) { 1525 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1526 jem.jni_methodID(), jem.location(), 1527 jem.exception()); 1528 } 1529 } 1530 } 1531 } 1532 } 1533 } 1534 1535 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1536 Klass* klass, jfieldID fieldID, bool is_static) { 1537 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1538 // At least one field access watch is set so we have more work 1539 // to do. This wrapper is used by entry points that allow us 1540 // to create handles in post_field_access_by_jni(). 1541 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1542 // event posting can block so refetch oop if we were passed a jobj 1543 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1544 } 1545 return obj; 1546 } 1547 1548 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1549 Klass* klass, jfieldID fieldID, bool is_static) { 1550 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1551 // At least one field access watch is set so we have more work 1552 // to do. This wrapper is used by "quick" entry points that don't 1553 // allow us to create handles in post_field_access_by_jni(). We 1554 // override that with a ResetNoHandleMark. 1555 ResetNoHandleMark rnhm; 1556 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1557 // event posting can block so refetch oop if we were passed a jobj 1558 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1559 } 1560 return obj; 1561 } 1562 1563 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1564 Klass* klass, jfieldID fieldID, bool is_static) { 1565 // We must be called with a Java context in order to provide reasonable 1566 // values for the klazz, method, and location fields. The callers of this 1567 // function don't make the call unless there is a Java context. 1568 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1569 1570 ResourceMark rm; 1571 fieldDescriptor fd; 1572 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1573 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1574 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1575 if (!valid_fieldID) return; 1576 // field accesses are not watched so bail 1577 if (!fd.is_field_access_watched()) return; 1578 1579 HandleMark hm(thread); 1580 KlassHandle h_klass(thread, klass); 1581 Handle h_obj; 1582 if (!is_static) { 1583 // non-static field accessors have an object, but we need a handle 1584 assert(obj != NULL, "non-static needs an object"); 1585 h_obj = Handle(thread, obj); 1586 } 1587 post_field_access(thread, 1588 thread->last_frame().interpreter_frame_method(), 1589 thread->last_frame().interpreter_frame_bcp(), 1590 h_klass, h_obj, fieldID); 1591 } 1592 1593 void JvmtiExport::post_field_access(JavaThread *thread, Method* method, 1594 address location, KlassHandle field_klass, Handle object, jfieldID field) { 1595 1596 HandleMark hm(thread); 1597 methodHandle mh(thread, method); 1598 1599 JvmtiThreadState *state = thread->jvmti_thread_state(); 1600 if (state == NULL) { 1601 return; 1602 } 1603 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered", 1604 JvmtiTrace::safe_get_thread_name(thread))); 1605 JvmtiEnvThreadStateIterator it(state); 1606 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1607 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1608 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT, 1609 JvmtiTrace::safe_get_thread_name(thread), 1610 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1611 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1612 location - mh()->code_base() )); 1613 1614 JvmtiEnv *env = ets->get_env(); 1615 JvmtiLocationEventMark jem(thread, mh, location); 1616 jclass field_jclass = jem.to_jclass(field_klass()); 1617 jobject field_jobject = jem.to_jobject(object()); 1618 JvmtiJavaThreadEventTransition jet(thread); 1619 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1620 if (callback != NULL) { 1621 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1622 jem.jni_methodID(), jem.location(), 1623 field_jclass, field_jobject, field); 1624 } 1625 } 1626 } 1627 } 1628 1629 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1630 Klass* klass, jfieldID fieldID, bool is_static, 1631 char sig_type, jvalue *value) { 1632 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1633 // At least one field modification watch is set so we have more work 1634 // to do. This wrapper is used by entry points that allow us 1635 // to create handles in post_field_modification_by_jni(). 1636 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1637 // event posting can block so refetch oop if we were passed a jobj 1638 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1639 } 1640 return obj; 1641 } 1642 1643 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1644 Klass* klass, jfieldID fieldID, bool is_static, 1645 char sig_type, jvalue *value) { 1646 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1647 // At least one field modification watch is set so we have more work 1648 // to do. This wrapper is used by "quick" entry points that don't 1649 // allow us to create handles in post_field_modification_by_jni(). We 1650 // override that with a ResetNoHandleMark. 1651 ResetNoHandleMark rnhm; 1652 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1653 // event posting can block so refetch oop if we were passed a jobj 1654 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1655 } 1656 return obj; 1657 } 1658 1659 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1660 Klass* klass, jfieldID fieldID, bool is_static, 1661 char sig_type, jvalue *value) { 1662 // We must be called with a Java context in order to provide reasonable 1663 // values for the klazz, method, and location fields. The callers of this 1664 // function don't make the call unless there is a Java context. 1665 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1666 1667 ResourceMark rm; 1668 fieldDescriptor fd; 1669 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1670 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1671 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1672 if (!valid_fieldID) return; 1673 // field modifications are not watched so bail 1674 if (!fd.is_field_modification_watched()) return; 1675 1676 HandleMark hm(thread); 1677 1678 Handle h_obj; 1679 if (!is_static) { 1680 // non-static field accessors have an object, but we need a handle 1681 assert(obj != NULL, "non-static needs an object"); 1682 h_obj = Handle(thread, obj); 1683 } 1684 KlassHandle h_klass(thread, klass); 1685 post_field_modification(thread, 1686 thread->last_frame().interpreter_frame_method(), 1687 thread->last_frame().interpreter_frame_bcp(), 1688 h_klass, h_obj, fieldID, sig_type, value); 1689 } 1690 1691 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method, 1692 address location, KlassHandle field_klass, Handle object, jfieldID field, 1693 char sig_type, jvalue *value) { 1694 1695 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') { 1696 // 'I' instructions are used for byte, char, short and int. 1697 // determine which it really is, and convert 1698 fieldDescriptor fd; 1699 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd); 1700 // should be found (if not, leave as is) 1701 if (found) { 1702 jint ival = value->i; 1703 // convert value from int to appropriate type 1704 switch (fd.field_type()) { 1705 case T_BOOLEAN: 1706 sig_type = 'Z'; 1707 value->i = 0; // clear it 1708 value->z = (jboolean)ival; 1709 break; 1710 case T_BYTE: 1711 sig_type = 'B'; 1712 value->i = 0; // clear it 1713 value->b = (jbyte)ival; 1714 break; 1715 case T_CHAR: 1716 sig_type = 'C'; 1717 value->i = 0; // clear it 1718 value->c = (jchar)ival; 1719 break; 1720 case T_SHORT: 1721 sig_type = 'S'; 1722 value->i = 0; // clear it 1723 value->s = (jshort)ival; 1724 break; 1725 case T_INT: 1726 // nothing to do 1727 break; 1728 default: 1729 // this is an integer instruction, should be one of above 1730 ShouldNotReachHere(); 1731 break; 1732 } 1733 } 1734 } 1735 1736 assert(sig_type != '[', "array should have sig_type == 'L'"); 1737 bool handle_created = false; 1738 1739 // convert oop to JNI handle. 1740 if (sig_type == 'L') { 1741 handle_created = true; 1742 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 1743 } 1744 1745 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 1746 1747 // Destroy the JNI handle allocated above. 1748 if (handle_created) { 1749 JNIHandles::destroy_local(value->l); 1750 } 1751 } 1752 1753 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method, 1754 address location, KlassHandle field_klass, Handle object, jfieldID field, 1755 char sig_type, jvalue *value_ptr) { 1756 1757 HandleMark hm(thread); 1758 methodHandle mh(thread, method); 1759 1760 JvmtiThreadState *state = thread->jvmti_thread_state(); 1761 if (state == NULL) { 1762 return; 1763 } 1764 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1765 ("[%s] Trg Field Modification event triggered", 1766 JvmtiTrace::safe_get_thread_name(thread))); 1767 1768 JvmtiEnvThreadStateIterator it(state); 1769 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1770 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 1771 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1772 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT, 1773 JvmtiTrace::safe_get_thread_name(thread), 1774 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1775 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1776 location - mh()->code_base() )); 1777 1778 JvmtiEnv *env = ets->get_env(); 1779 JvmtiLocationEventMark jem(thread, mh, location); 1780 jclass field_jclass = jem.to_jclass(field_klass()); 1781 jobject field_jobject = jem.to_jobject(object()); 1782 JvmtiJavaThreadEventTransition jet(thread); 1783 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 1784 if (callback != NULL) { 1785 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1786 jem.jni_methodID(), jem.location(), 1787 field_jclass, field_jobject, field, sig_type, *value_ptr); 1788 } 1789 } 1790 } 1791 } 1792 1793 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) { 1794 JavaThread* thread = JavaThread::current(); 1795 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1796 1797 HandleMark hm(thread); 1798 methodHandle mh(thread, method); 1799 1800 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered", 1801 JvmtiTrace::safe_get_thread_name(thread))); 1802 1803 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1804 JvmtiEnvIterator it; 1805 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1806 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1807 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent", 1808 JvmtiTrace::safe_get_thread_name(thread) )); 1809 1810 JvmtiMethodEventMark jem(thread, mh); 1811 JvmtiJavaThreadEventTransition jet(thread); 1812 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env(); 1813 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 1814 if (callback != NULL) { 1815 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 1816 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 1817 } 1818 } 1819 } 1820 } 1821 } 1822 1823 // Returns a record containing inlining information for the given nmethod 1824 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 1825 jint numstackframes = 0; 1826 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 1827 record->header.kind = JVMTI_CMLR_INLINE_INFO; 1828 record->header.next = NULL; 1829 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 1830 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 1831 record->numpcs = 0; 1832 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1833 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1834 record->numpcs++; 1835 } 1836 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 1837 int scope = 0; 1838 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1839 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1840 void* pc_address = (void*)p->real_pc(nm); 1841 assert(pc_address != NULL, "pc_address must be non-null"); 1842 record->pcinfo[scope].pc = pc_address; 1843 numstackframes=0; 1844 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1845 numstackframes++; 1846 } 1847 assert(numstackframes != 0, "numstackframes must be nonzero."); 1848 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 1849 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 1850 record->pcinfo[scope].numstackframes = numstackframes; 1851 int stackframe = 0; 1852 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1853 // 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() 1854 assert(sd->method() != NULL, "sd->method() cannot be null."); 1855 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 1856 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 1857 stackframe++; 1858 } 1859 scope++; 1860 } 1861 return record; 1862 } 1863 1864 void JvmtiExport::post_compiled_method_load(nmethod *nm) { 1865 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1866 return; 1867 } 1868 JavaThread* thread = JavaThread::current(); 1869 1870 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1871 ("[%s] method compile load event triggered", 1872 JvmtiTrace::safe_get_thread_name(thread))); 1873 1874 JvmtiEnvIterator it; 1875 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1876 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1877 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1878 continue; 1879 } 1880 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1881 ("[%s] class compile method load event sent %s.%s ", 1882 JvmtiTrace::safe_get_thread_name(thread), 1883 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 1884 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 1885 ResourceMark rm(thread); 1886 HandleMark hm(thread); 1887 1888 // Add inlining information 1889 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 1890 // Pass inlining information through the void pointer 1891 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 1892 JvmtiJavaThreadEventTransition jet(thread); 1893 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1894 if (callback != NULL) { 1895 (*callback)(env->jvmti_external(), jem.jni_methodID(), 1896 jem.code_size(), jem.code_data(), jem.map_length(), 1897 jem.map(), jem.compile_info()); 1898 } 1899 } 1900 } 1901 } 1902 1903 1904 // post a COMPILED_METHOD_LOAD event for a given environment 1905 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, 1906 const void *code_begin, const jint map_length, 1907 const jvmtiAddrLocationMap* map) 1908 { 1909 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) { 1910 return; 1911 } 1912 JavaThread* thread = JavaThread::current(); 1913 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1914 ("[%s] method compile load event triggered (by GenerateEvents)", 1915 JvmtiTrace::safe_get_thread_name(thread))); 1916 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1917 1918 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1919 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT, 1920 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 1921 1922 JvmtiEventMark jem(thread); 1923 JvmtiJavaThreadEventTransition jet(thread); 1924 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1925 if (callback != NULL) { 1926 (*callback)(env->jvmti_external(), method, 1927 length, code_begin, map_length, 1928 map, NULL); 1929 } 1930 } 1931 } 1932 1933 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 1934 assert(name != NULL && name[0] != '\0', "sanity check"); 1935 1936 JavaThread* thread = JavaThread::current(); 1937 // In theory everyone coming thru here is in_vm but we need to be certain 1938 // because a callee will do a vm->native transition 1939 ThreadInVMfromUnknown __tiv; 1940 1941 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1942 ("[%s] method dynamic code generated event triggered", 1943 JvmtiTrace::safe_get_thread_name(thread))); 1944 JvmtiEnvIterator it; 1945 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1946 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1947 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1948 ("[%s] dynamic code generated event sent for %s", 1949 JvmtiTrace::safe_get_thread_name(thread), name)); 1950 JvmtiEventMark jem(thread); 1951 JvmtiJavaThreadEventTransition jet(thread); 1952 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1953 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1954 if (callback != NULL) { 1955 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1956 } 1957 } 1958 } 1959 } 1960 1961 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 1962 jvmtiPhase phase = JvmtiEnv::get_phase(); 1963 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 1964 post_dynamic_code_generated_internal(name, code_begin, code_end); 1965 } else { 1966 // It may not be safe to post the event from this thread. Defer all 1967 // postings to the service thread so that it can perform them in a safe 1968 // context and in-order. 1969 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); 1970 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 1971 name, code_begin, code_end); 1972 JvmtiDeferredEventQueue::enqueue(event); 1973 } 1974 } 1975 1976 1977 // post a DYNAMIC_CODE_GENERATED event for a given environment 1978 // used by GenerateEvents 1979 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 1980 const void *code_begin, const void *code_end) 1981 { 1982 JavaThread* thread = JavaThread::current(); 1983 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1984 ("[%s] dynamic code generated event triggered (by GenerateEvents)", 1985 JvmtiTrace::safe_get_thread_name(thread))); 1986 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1987 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1988 ("[%s] dynamic code generated event sent for %s", 1989 JvmtiTrace::safe_get_thread_name(thread), name)); 1990 JvmtiEventMark jem(thread); 1991 JvmtiJavaThreadEventTransition jet(thread); 1992 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1993 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1994 if (callback != NULL) { 1995 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1996 } 1997 } 1998 } 1999 2000 // post a DynamicCodeGenerated event while holding locks in the VM. 2001 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 2002 address code_begin, address code_end) 2003 { 2004 // register the stub with the current dynamic code event collector 2005 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2006 // state can only be NULL if the current thread is exiting which 2007 // should not happen since we're trying to post an event 2008 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 2009 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 2010 guarantee(collector != NULL, "attempt to register stub without event collector"); 2011 collector->register_stub(name, code_begin, code_end); 2012 } 2013 2014 // Collect all the vm internally allocated objects which are visible to java world 2015 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 2016 Thread* thread = Thread::current_or_null(); 2017 if (thread != NULL && thread->is_Java_thread()) { 2018 // Can not take safepoint here. 2019 NoSafepointVerifier no_sfpt; 2020 // Can not take safepoint here so can not use state_for to get 2021 // jvmti thread state. 2022 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2023 if (state != NULL ) { 2024 // state is non NULL when VMObjectAllocEventCollector is enabled. 2025 JvmtiVMObjectAllocEventCollector *collector; 2026 collector = state->get_vm_object_alloc_event_collector(); 2027 if (collector != NULL && collector->is_enabled()) { 2028 // Don't record classes as these will be notified via the ClassLoad 2029 // event. 2030 if (obj->klass() != SystemDictionary::Class_klass()) { 2031 collector->record_allocation(obj); 2032 } 2033 } 2034 } 2035 } 2036 } 2037 2038 void JvmtiExport::post_garbage_collection_finish() { 2039 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 2040 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2041 ("[%s] garbage collection finish event triggered", 2042 JvmtiTrace::safe_get_thread_name(thread))); 2043 JvmtiEnvIterator it; 2044 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2045 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 2046 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2047 ("[%s] garbage collection finish event sent", 2048 JvmtiTrace::safe_get_thread_name(thread))); 2049 JvmtiThreadEventTransition jet(thread); 2050 // JNIEnv is NULL here because this event is posted from VM Thread 2051 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 2052 if (callback != NULL) { 2053 (*callback)(env->jvmti_external()); 2054 } 2055 } 2056 } 2057 } 2058 2059 void JvmtiExport::post_garbage_collection_start() { 2060 Thread* thread = Thread::current(); // this event is posted from vm-thread. 2061 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2062 ("[%s] garbage collection start event triggered", 2063 JvmtiTrace::safe_get_thread_name(thread))); 2064 JvmtiEnvIterator it; 2065 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2066 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 2067 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2068 ("[%s] garbage collection start event sent", 2069 JvmtiTrace::safe_get_thread_name(thread))); 2070 JvmtiThreadEventTransition jet(thread); 2071 // JNIEnv is NULL here because this event is posted from VM Thread 2072 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 2073 if (callback != NULL) { 2074 (*callback)(env->jvmti_external()); 2075 } 2076 } 2077 } 2078 } 2079 2080 void JvmtiExport::post_data_dump() { 2081 Thread *thread = Thread::current(); 2082 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2083 ("[%s] data dump request event triggered", 2084 JvmtiTrace::safe_get_thread_name(thread))); 2085 JvmtiEnvIterator it; 2086 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2087 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 2088 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2089 ("[%s] data dump request event sent", 2090 JvmtiTrace::safe_get_thread_name(thread))); 2091 JvmtiThreadEventTransition jet(thread); 2092 // JNIEnv is NULL here because this event is posted from VM Thread 2093 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 2094 if (callback != NULL) { 2095 (*callback)(env->jvmti_external()); 2096 } 2097 } 2098 } 2099 } 2100 2101 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 2102 oop object = (oop)obj_mntr->object(); 2103 if (!ServiceUtil::visible_oop(object)) { 2104 // Ignore monitor contended enter for vm internal object. 2105 return; 2106 } 2107 JvmtiThreadState *state = thread->jvmti_thread_state(); 2108 if (state == NULL) { 2109 return; 2110 } 2111 2112 HandleMark hm(thread); 2113 Handle h(thread, object); 2114 2115 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2116 ("[%s] montior contended enter event triggered", 2117 JvmtiTrace::safe_get_thread_name(thread))); 2118 2119 JvmtiEnvThreadStateIterator it(state); 2120 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2121 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2122 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2123 ("[%s] monitor contended enter event sent", 2124 JvmtiTrace::safe_get_thread_name(thread))); 2125 JvmtiMonitorEventMark jem(thread, h()); 2126 JvmtiEnv *env = ets->get_env(); 2127 JvmtiThreadEventTransition jet(thread); 2128 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2129 if (callback != NULL) { 2130 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2131 } 2132 } 2133 } 2134 } 2135 2136 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2137 oop object = (oop)obj_mntr->object(); 2138 if (!ServiceUtil::visible_oop(object)) { 2139 // Ignore monitor contended entered for vm internal object. 2140 return; 2141 } 2142 JvmtiThreadState *state = thread->jvmti_thread_state(); 2143 if (state == NULL) { 2144 return; 2145 } 2146 2147 HandleMark hm(thread); 2148 Handle h(thread, object); 2149 2150 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2151 ("[%s] montior contended entered event triggered", 2152 JvmtiTrace::safe_get_thread_name(thread))); 2153 2154 JvmtiEnvThreadStateIterator it(state); 2155 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2156 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2157 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2158 ("[%s] monitor contended enter event sent", 2159 JvmtiTrace::safe_get_thread_name(thread))); 2160 JvmtiMonitorEventMark jem(thread, h()); 2161 JvmtiEnv *env = ets->get_env(); 2162 JvmtiThreadEventTransition jet(thread); 2163 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2164 if (callback != NULL) { 2165 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2166 } 2167 } 2168 } 2169 } 2170 2171 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2172 jlong timeout) { 2173 JvmtiThreadState *state = thread->jvmti_thread_state(); 2174 if (state == NULL) { 2175 return; 2176 } 2177 2178 HandleMark hm(thread); 2179 Handle h(thread, object); 2180 2181 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2182 ("[%s] montior wait event triggered", 2183 JvmtiTrace::safe_get_thread_name(thread))); 2184 2185 JvmtiEnvThreadStateIterator it(state); 2186 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2187 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2188 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2189 ("[%s] monitor wait event sent", 2190 JvmtiTrace::safe_get_thread_name(thread))); 2191 JvmtiMonitorEventMark jem(thread, h()); 2192 JvmtiEnv *env = ets->get_env(); 2193 JvmtiThreadEventTransition jet(thread); 2194 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2195 if (callback != NULL) { 2196 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2197 jem.jni_object(), timeout); 2198 } 2199 } 2200 } 2201 } 2202 2203 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2204 oop object = (oop)obj_mntr->object(); 2205 if (!ServiceUtil::visible_oop(object)) { 2206 // Ignore monitor waited for vm internal object. 2207 return; 2208 } 2209 JvmtiThreadState *state = thread->jvmti_thread_state(); 2210 if (state == NULL) { 2211 return; 2212 } 2213 2214 HandleMark hm(thread); 2215 Handle h(thread, object); 2216 2217 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2218 ("[%s] montior waited event triggered", 2219 JvmtiTrace::safe_get_thread_name(thread))); 2220 2221 JvmtiEnvThreadStateIterator it(state); 2222 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2223 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2224 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2225 ("[%s] monitor waited event sent", 2226 JvmtiTrace::safe_get_thread_name(thread))); 2227 JvmtiMonitorEventMark jem(thread, h()); 2228 JvmtiEnv *env = ets->get_env(); 2229 JvmtiThreadEventTransition jet(thread); 2230 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2231 if (callback != NULL) { 2232 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2233 jem.jni_object(), timed_out); 2234 } 2235 } 2236 } 2237 } 2238 2239 2240 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2241 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered", 2242 JvmtiTrace::safe_get_thread_name(thread))); 2243 if (object == NULL) { 2244 return; 2245 } 2246 HandleMark hm(thread); 2247 Handle h(thread, object); 2248 JvmtiEnvIterator it; 2249 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2250 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2251 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s", 2252 JvmtiTrace::safe_get_thread_name(thread), 2253 object==NULL? "NULL" : object->klass()->external_name())); 2254 2255 JvmtiVMObjectAllocEventMark jem(thread, h()); 2256 JvmtiJavaThreadEventTransition jet(thread); 2257 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2258 if (callback != NULL) { 2259 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2260 jem.jni_jobject(), jem.jni_class(), jem.size()); 2261 } 2262 } 2263 } 2264 } 2265 2266 //////////////////////////////////////////////////////////////////////////////////////////////// 2267 2268 void JvmtiExport::cleanup_thread(JavaThread* thread) { 2269 assert(JavaThread::current() == thread, "thread is not current"); 2270 MutexLocker mu(JvmtiThreadState_lock); 2271 2272 if (thread->jvmti_thread_state() != NULL) { 2273 // This has to happen after the thread state is removed, which is 2274 // why it is not in post_thread_end_event like its complement 2275 // Maybe both these functions should be rolled into the posts? 2276 JvmtiEventController::thread_ended(thread); 2277 } 2278 } 2279 2280 void JvmtiExport::clear_detected_exception(JavaThread* thread) { 2281 assert(JavaThread::current() == thread, "thread is not current"); 2282 2283 JvmtiThreadState* state = thread->jvmti_thread_state(); 2284 if (state != NULL) { 2285 state->clear_exception_state(); 2286 } 2287 } 2288 2289 void JvmtiExport::oops_do(OopClosure* f) { 2290 JvmtiCurrentBreakpoints::oops_do(f); 2291 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f); 2292 } 2293 2294 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { 2295 JvmtiTagMap::weak_oops_do(is_alive, f); 2296 } 2297 2298 void JvmtiExport::gc_epilogue() { 2299 JvmtiCurrentBreakpoints::gc_epilogue(); 2300 } 2301 2302 // Onload raw monitor transition. 2303 void JvmtiExport::transition_pending_onload_raw_monitors() { 2304 JvmtiPendingMonitors::transition_raw_monitors(); 2305 } 2306 2307 //////////////////////////////////////////////////////////////////////////////////////////////// 2308 #if INCLUDE_SERVICES 2309 // Attach is disabled if SERVICES is not included 2310 2311 // type for the Agent_OnAttach entry point 2312 extern "C" { 2313 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2314 } 2315 2316 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) { 2317 // get agent name and options 2318 const char* agent = op->arg(0); 2319 const char* absParam = op->arg(1); 2320 const char* options = op->arg(2); 2321 2322 return load_agent_library(agent, absParam, options, st); 2323 } 2324 2325 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam, 2326 const char *options, outputStream* st) { 2327 char ebuf[1024]; 2328 char buffer[JVM_MAXPATHLEN]; 2329 void* library = NULL; 2330 jint result = JNI_ERR; 2331 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2332 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols); 2333 2334 // The abs paramter should be "true" or "false" 2335 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2336 2337 // Initially marked as invalid. It will be set to valid if we can find the agent 2338 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL); 2339 2340 // Check for statically linked in agent. If not found then if the path is 2341 // absolute we attempt to load the library. Otherwise we try to load it 2342 // from the standard dll directory. 2343 2344 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) { 2345 if (is_absolute_path) { 2346 library = os::dll_load(agent, ebuf, sizeof ebuf); 2347 } else { 2348 // Try to load the agent from the standard dll directory 2349 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), 2350 agent)) { 2351 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2352 } 2353 if (library == NULL) { 2354 // not found - try local path 2355 char ns[1] = {0}; 2356 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) { 2357 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2358 } 2359 } 2360 } 2361 if (library != NULL) { 2362 agent_lib->set_os_lib(library); 2363 agent_lib->set_valid(); 2364 } 2365 } 2366 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2367 // function 2368 if (agent_lib->valid()) { 2369 // Lookup the Agent_OnAttach function 2370 OnAttachEntry_t on_attach_entry = NULL; 2371 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, 2372 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries)); 2373 if (on_attach_entry == NULL) { 2374 // Agent_OnAttach missing - unload library 2375 if (!agent_lib->is_static_lib()) { 2376 os::dll_unload(library); 2377 } 2378 delete agent_lib; 2379 } else { 2380 // Invoke the Agent_OnAttach function 2381 JavaThread* THREAD = JavaThread::current(); 2382 { 2383 extern struct JavaVM_ main_vm; 2384 JvmtiThreadEventMark jem(THREAD); 2385 JvmtiJavaThreadEventTransition jet(THREAD); 2386 2387 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2388 } 2389 2390 // Agent_OnAttach may have used JNI 2391 if (HAS_PENDING_EXCEPTION) { 2392 CLEAR_PENDING_EXCEPTION; 2393 } 2394 2395 // If OnAttach returns JNI_OK then we add it to the list of 2396 // agent libraries so that we can call Agent_OnUnload later. 2397 if (result == JNI_OK) { 2398 Arguments::add_loaded_agent(agent_lib); 2399 } else { 2400 delete agent_lib; 2401 } 2402 2403 // Agent_OnAttach executed so completion status is JNI_OK 2404 st->print_cr("%d", result); 2405 result = JNI_OK; 2406 } 2407 } 2408 return result; 2409 } 2410 2411 #endif // INCLUDE_SERVICES 2412 //////////////////////////////////////////////////////////////////////////////////////////////// 2413 2414 // Setup current current thread for event collection. 2415 void JvmtiEventCollector::setup_jvmti_thread_state() { 2416 // set this event collector to be the current one. 2417 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2418 // state can only be NULL if the current thread is exiting which 2419 // should not happen since we're trying to configure for event collection 2420 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2421 if (is_vm_object_alloc_event()) { 2422 _prev = state->get_vm_object_alloc_event_collector(); 2423 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2424 } else if (is_dynamic_code_event()) { 2425 _prev = state->get_dynamic_code_event_collector(); 2426 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2427 } 2428 } 2429 2430 // Unset current event collection in this thread and reset it with previous 2431 // collector. 2432 void JvmtiEventCollector::unset_jvmti_thread_state() { 2433 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2434 if (state != NULL) { 2435 // restore the previous event collector (if any) 2436 if (is_vm_object_alloc_event()) { 2437 if (state->get_vm_object_alloc_event_collector() == this) { 2438 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2439 } else { 2440 // this thread's jvmti state was created during the scope of 2441 // the event collector. 2442 } 2443 } else { 2444 if (is_dynamic_code_event()) { 2445 if (state->get_dynamic_code_event_collector() == this) { 2446 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2447 } else { 2448 // this thread's jvmti state was created during the scope of 2449 // the event collector. 2450 } 2451 } 2452 } 2453 } 2454 } 2455 2456 // create the dynamic code event collector 2457 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2458 if (JvmtiExport::should_post_dynamic_code_generated()) { 2459 setup_jvmti_thread_state(); 2460 } 2461 } 2462 2463 // iterate over any code blob descriptors collected and post a 2464 // DYNAMIC_CODE_GENERATED event to the profiler. 2465 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2466 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2467 // iterate over any code blob descriptors that we collected 2468 if (_code_blobs != NULL) { 2469 for (int i=0; i<_code_blobs->length(); i++) { 2470 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2471 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2472 FreeHeap(blob); 2473 } 2474 delete _code_blobs; 2475 } 2476 unset_jvmti_thread_state(); 2477 } 2478 2479 // register a stub 2480 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2481 if (_code_blobs == NULL) { 2482 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true); 2483 } 2484 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2485 } 2486 2487 // Setup current thread to record vm allocated objects. 2488 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) { 2489 if (JvmtiExport::should_post_vm_object_alloc()) { 2490 _enable = true; 2491 setup_jvmti_thread_state(); 2492 } else { 2493 _enable = false; 2494 } 2495 } 2496 2497 // Post vm_object_alloc event for vm allocated objects visible to java 2498 // world. 2499 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2500 if (_allocated != NULL) { 2501 set_enabled(false); 2502 for (int i = 0; i < _allocated->length(); i++) { 2503 oop obj = _allocated->at(i); 2504 if (ServiceUtil::visible_oop(obj)) { 2505 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj); 2506 } 2507 } 2508 delete _allocated; 2509 } 2510 unset_jvmti_thread_state(); 2511 } 2512 2513 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) { 2514 assert(is_enabled(), "VM object alloc event collector is not enabled"); 2515 if (_allocated == NULL) { 2516 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true); 2517 } 2518 _allocated->push(obj); 2519 } 2520 2521 // GC support. 2522 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) { 2523 if (_allocated != NULL) { 2524 for(int i=_allocated->length() - 1; i >= 0; i--) { 2525 if (_allocated->at(i) != NULL) { 2526 f->do_oop(_allocated->adr_at(i)); 2527 } 2528 } 2529 } 2530 } 2531 2532 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { 2533 // no-op if jvmti not enabled 2534 if (!JvmtiEnv::environments_might_exist()) { 2535 return; 2536 } 2537 2538 // Runs at safepoint. So no need to acquire Threads_lock. 2539 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) { 2540 JvmtiThreadState *state = jthr->jvmti_thread_state(); 2541 if (state != NULL) { 2542 JvmtiVMObjectAllocEventCollector *collector; 2543 collector = state->get_vm_object_alloc_event_collector(); 2544 while (collector != NULL) { 2545 collector->oops_do(f); 2546 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev(); 2547 } 2548 } 2549 } 2550 } 2551 2552 2553 // Disable collection of VMObjectAlloc events 2554 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2555 // a no-op if VMObjectAlloc event is not enabled 2556 if (!JvmtiExport::should_post_vm_object_alloc()) { 2557 return; 2558 } 2559 Thread* thread = Thread::current_or_null(); 2560 if (thread != NULL && thread->is_Java_thread()) { 2561 JavaThread* current_thread = (JavaThread*)thread; 2562 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2563 if (state != NULL) { 2564 JvmtiVMObjectAllocEventCollector *collector; 2565 collector = state->get_vm_object_alloc_event_collector(); 2566 if (collector != NULL && collector->is_enabled()) { 2567 _collector = collector; 2568 _collector->set_enabled(false); 2569 } 2570 } 2571 } 2572 } 2573 2574 // Re-Enable collection of VMObjectAlloc events (if previously enabled) 2575 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2576 if (was_enabled()) { 2577 _collector->set_enabled(true); 2578 } 2579 }; 2580 2581 JvmtiGCMarker::JvmtiGCMarker() { 2582 // if there aren't any JVMTI environments then nothing to do 2583 if (!JvmtiEnv::environments_might_exist()) { 2584 return; 2585 } 2586 2587 if (JvmtiExport::should_post_garbage_collection_start()) { 2588 JvmtiExport::post_garbage_collection_start(); 2589 } 2590 2591 if (SafepointSynchronize::is_at_safepoint()) { 2592 // Do clean up tasks that need to be done at a safepoint 2593 JvmtiEnvBase::check_for_periodic_clean_up(); 2594 } 2595 } 2596 2597 JvmtiGCMarker::~JvmtiGCMarker() { 2598 // if there aren't any JVMTI environments then nothing to do 2599 if (!JvmtiEnv::environments_might_exist()) { 2600 return; 2601 } 2602 2603 // JVMTI notify gc finish 2604 if (JvmtiExport::should_post_garbage_collection_finish()) { 2605 JvmtiExport::post_garbage_collection_finish(); 2606 } 2607 }