jvmtiExport.cpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 2003, 2010, 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 "incls/_precompiled.incl" 26# include "incls/_jvmtiExport.cpp.incl" 27 28#ifdef JVMTI_TRACE 29#define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; } 30#define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; } 31#else 32#define EVT_TRIG_TRACE(evt,out) 33#define EVT_TRACE(evt,out) 34#endif 35 36/////////////////////////////////////////////////////////////// 37// 38// JvmtiEventTransition 39// 40// TO DO -- 41// more handle purging 42 43// Use this for JavaThreads and state is _thread_in_vm. 44class JvmtiJavaThreadEventTransition : StackObj { 45private: 46 ResourceMark _rm; 47 ThreadToNativeFromVM _transition; 48 HandleMark _hm; 49 50public: 51 JvmtiJavaThreadEventTransition(JavaThread *thread) : 52 _rm(), 53 _transition(thread), 54 _hm(thread) {}; 55}; 56 57// For JavaThreads which are not in _thread_in_vm state 58// and other system threads use this. 59class JvmtiThreadEventTransition : StackObj { 60private: 61 ResourceMark _rm; 62 HandleMark _hm; 63 JavaThreadState _saved_state; 64 JavaThread *_jthread; 65 66public: 67 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { 68 if (thread->is_Java_thread()) { 69 _jthread = (JavaThread *)thread; 70 _saved_state = _jthread->thread_state(); 71 if (_saved_state == _thread_in_Java) { 72 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 73 } else { 74 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 75 } 76 } else { 77 _jthread = NULL; 78 } 79 } 80 81 ~JvmtiThreadEventTransition() { 82 if (_jthread != NULL) 83 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 84 } 85}; 86 87 88/////////////////////////////////////////////////////////////// 89// 90// JvmtiEventMark 91// 92 93class JvmtiEventMark : public StackObj { 94private: 95 JavaThread *_thread; 96 JNIEnv* _jni_env; 97 bool _exception_detected; 98 bool _exception_caught; 99#if 0 100 JNIHandleBlock* _hblock; 101#endif 102 103public: 104 JvmtiEventMark(JavaThread *thread) : _thread(thread), 105 _jni_env(thread->jni_environment()) { 106#if 0 107 _hblock = thread->active_handles(); 108 _hblock->clear_thoroughly(); // so we can be safe 109#else 110 // we want to use the code above - but that needs the JNIHandle changes - later... 111 // for now, steal JNI push local frame code 112 JvmtiThreadState *state = thread->jvmti_thread_state(); 113 // we are before an event. 114 // Save current jvmti thread exception state. 115 if (state != NULL) { 116 _exception_detected = state->is_exception_detected(); 117 _exception_caught = state->is_exception_caught(); 118 } else { 119 _exception_detected = false; 120 _exception_caught = false; 121 } 122 123 JNIHandleBlock* old_handles = thread->active_handles(); 124 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 125 assert(new_handles != NULL, "should not be NULL"); 126 new_handles->set_pop_frame_link(old_handles); 127 thread->set_active_handles(new_handles); 128#endif 129 assert(thread == JavaThread::current(), "thread must be current!"); 130 thread->frame_anchor()->make_walkable(thread); 131 }; 132 133 ~JvmtiEventMark() { 134#if 0 135 _hblock->clear(); // for consistency with future correct behavior 136#else 137 // we want to use the code above - but that needs the JNIHandle changes - later... 138 // for now, steal JNI pop local frame code 139 JNIHandleBlock* old_handles = _thread->active_handles(); 140 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 141 assert(new_handles != NULL, "should not be NULL"); 142 _thread->set_active_handles(new_handles); 143 // Note that we set the pop_frame_link to NULL explicitly, otherwise 144 // the release_block call will release the blocks. 145 old_handles->set_pop_frame_link(NULL); 146 JNIHandleBlock::release_block(old_handles, _thread); // may block 147#endif 148 149 JvmtiThreadState* state = _thread->jvmti_thread_state(); 150 // we are continuing after an event. 151 if (state != NULL) { 152 // Restore the jvmti thread exception state. 153 if (_exception_detected) { 154 state->set_exception_detected(); 155 } 156 if (_exception_caught) { 157 state->set_exception_caught(); 158 } 159 } 160 } 161 162#if 0 163 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 164#else 165 // we want to use the code above - but that needs the JNIHandle changes - later... 166 // for now, use regular make_local 167 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 168#endif 169 170 jclass to_jclass(klassOop klass) { return (klass == NULL ? NULL : (jclass)to_jobject(Klass::cast(klass)->java_mirror())); } 171 172 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); } 173 174 JNIEnv* jni_env() { return _jni_env; } 175}; 176 177class JvmtiThreadEventMark : public JvmtiEventMark { 178private: 179 jthread _jt; 180 181public: 182 JvmtiThreadEventMark(JavaThread *thread) : 183 JvmtiEventMark(thread) { 184 _jt = (jthread)(to_jobject(thread->threadObj())); 185 }; 186 jthread jni_thread() { return _jt; } 187}; 188 189class JvmtiClassEventMark : public JvmtiThreadEventMark { 190private: 191 jclass _jc; 192 193public: 194 JvmtiClassEventMark(JavaThread *thread, klassOop klass) : 195 JvmtiThreadEventMark(thread) { 196 _jc = to_jclass(klass); 197 }; 198 jclass jni_class() { return _jc; } 199}; 200 201class JvmtiMethodEventMark : public JvmtiThreadEventMark { 202private: 203 jmethodID _mid; 204 205public: 206 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) : 207 JvmtiThreadEventMark(thread), 208 _mid(to_jmethodID(method)) {}; 209 jmethodID jni_methodID() { return _mid; } 210}; 211 212class JvmtiLocationEventMark : public JvmtiMethodEventMark { 213private: 214 jlocation _loc; 215 216public: 217 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) : 218 JvmtiMethodEventMark(thread, method), 219 _loc(location - method->code_base()) {}; 220 jlocation location() { return _loc; } 221}; 222 223class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 224private: 225 jobject _exc; 226 227public: 228 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) : 229 JvmtiLocationEventMark(thread, method, location), 230 _exc(to_jobject(exception())) {}; 231 jobject exception() { return _exc; } 232}; 233 234class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 235private: 236 const char *_class_name; 237 jobject _jloader; 238 jobject _protection_domain; 239 jclass _class_being_redefined; 240 241public: 242 JvmtiClassFileLoadEventMark(JavaThread *thread, symbolHandle name, 243 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) { 244 _class_name = name() != NULL? name->as_utf8() : NULL; 245 _jloader = (jobject)to_jobject(class_loader()); 246 _protection_domain = (jobject)to_jobject(prot_domain()); 247 if (class_being_redefined == NULL) { 248 _class_being_redefined = NULL; 249 } else { 250 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)()); 251 } 252 }; 253 const char *class_name() { 254 return _class_name; 255 } 256 jobject jloader() { 257 return _jloader; 258 } 259 jobject protection_domain() { 260 return _protection_domain; 261 } 262 jclass class_being_redefined() { 263 return _class_being_redefined; 264 } 265}; 266 267////////////////////////////////////////////////////////////////////////////// 268 269int JvmtiExport::_field_access_count = 0; 270int JvmtiExport::_field_modification_count = 0; 271 272bool JvmtiExport::_can_access_local_variables = false; 273bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 274bool JvmtiExport::_can_modify_any_class = false; 275bool JvmtiExport::_can_walk_any_space = false; 276 277bool JvmtiExport::_has_redefined_a_class = false; 278bool JvmtiExport::_all_dependencies_are_recorded = false; 279 280// 281// field access management 282// 283 284// interpreter generator needs the address of the counter 285address JvmtiExport::get_field_access_count_addr() { 286 // We don't grab a lock because we don't want to 287 // serialize field access between all threads. This means that a 288 // thread on another processor can see the wrong count value and 289 // may either miss making a needed call into post_field_access() 290 // or will make an unneeded call into post_field_access(). We pay 291 // this price to avoid slowing down the VM when we aren't watching 292 // field accesses. 293 // Other access/mutation safe by virtue of being in VM state. 294 return (address)(&_field_access_count); 295} 296 297// 298// field modification management 299// 300 301// interpreter generator needs the address of the counter 302address JvmtiExport::get_field_modification_count_addr() { 303 // We don't grab a lock because we don't 304 // want to serialize field modification between all threads. This 305 // means that a thread on another processor can see the wrong 306 // count value and may either miss making a needed call into 307 // post_field_modification() or will make an unneeded call into 308 // post_field_modification(). We pay this price to avoid slowing 309 // down the VM when we aren't watching field modifications. 310 // Other access/mutation safe by virtue of being in VM state. 311 return (address)(&_field_modification_count); 312} 313 314 315/////////////////////////////////////////////////////////////// 316// Functions needed by java.lang.instrument for starting up javaagent. 317/////////////////////////////////////////////////////////////// 318 319jint 320JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 321 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 322 // has already been validated in JNI GetEnv(). 323 int major, minor, micro; 324 325 // micro version doesn't matter here (yet?) 326 decode_version_values(version, &major, &minor, µ); 327 switch (major) { 328 case 1: 329 switch (minor) { 330 case 0: // version 1.0.<micro> is recognized 331 case 1: // version 1.1.<micro> is recognized 332 break; 333 334 default: 335 return JNI_EVERSION; // unsupported minor version number 336 } 337 break; 338 339 default: 340 return JNI_EVERSION; // unsupported major version number 341 } 342 343 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 344 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread(); 345 // transition code: native to VM 346 ThreadInVMfromNative __tiv(current_thread); 347 __ENTRY(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 348 debug_only(VMNativeEntryWrapper __vew;) 349 350 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 351 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 352 return JNI_OK; 353 354 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 355 // not live, no thread to transition 356 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 357 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 358 return JNI_OK; 359 360 } else { 361 // Called at the wrong time 362 *penv = NULL; 363 return JNI_EDETACHED; 364 } 365} 366 367 368void 369JvmtiExport::decode_version_values(jint version, int * major, int * minor, 370 int * micro) { 371 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 372 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 373 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 374} 375 376void JvmtiExport::enter_primordial_phase() { 377 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 378} 379 380void JvmtiExport::enter_start_phase() { 381 JvmtiManageCapabilities::recompute_always_capabilities(); 382 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 383} 384 385void JvmtiExport::enter_onload_phase() { 386 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 387} 388 389void JvmtiExport::enter_live_phase() { 390 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 391} 392 393// 394// JVMTI events that the VM posts to the debugger and also startup agent 395// and call the agent's premain() for java.lang.instrument. 396// 397 398void JvmtiExport::post_vm_start() { 399 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" )); 400 401 // can now enable some events 402 JvmtiEventController::vm_start(); 403 404 JvmtiEnvIterator it; 405 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 406 if (env->is_enabled(JVMTI_EVENT_VM_START)) { 407 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" )); 408 409 JavaThread *thread = JavaThread::current(); 410 JvmtiThreadEventMark jem(thread); 411 JvmtiJavaThreadEventTransition jet(thread); 412 jvmtiEventVMStart callback = env->callbacks()->VMStart; 413 if (callback != NULL) { 414 (*callback)(env->jvmti_external(), jem.jni_env()); 415 } 416 } 417 } 418} 419 420 421void JvmtiExport::post_vm_initialized() { 422 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" )); 423 424 // can now enable events 425 JvmtiEventController::vm_init(); 426 427 JvmtiEnvIterator it; 428 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 429 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 430 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" )); 431 432 JavaThread *thread = JavaThread::current(); 433 JvmtiThreadEventMark jem(thread); 434 JvmtiJavaThreadEventTransition jet(thread); 435 jvmtiEventVMInit callback = env->callbacks()->VMInit; 436 if (callback != NULL) { 437 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 438 } 439 } 440 } 441} 442 443 444void JvmtiExport::post_vm_death() { 445 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" )); 446 447 JvmtiEnvIterator it; 448 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 449 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 450 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" )); 451 452 JavaThread *thread = JavaThread::current(); 453 JvmtiEventMark jem(thread); 454 JvmtiJavaThreadEventTransition jet(thread); 455 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 456 if (callback != NULL) { 457 (*callback)(env->jvmti_external(), jem.jni_env()); 458 } 459 } 460 } 461 462 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 463 JvmtiEventController::vm_death(); 464} 465 466char** 467JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 468 // Have to grab JVMTI thread state lock to be sure environment doesn't 469 // go away while we iterate them. No locks during VM bring-up. 470 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 471 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 472 } else { 473 MutexLocker mu(JvmtiThreadState_lock); 474 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 475 } 476} 477 478class JvmtiClassFileLoadHookPoster : public StackObj { 479 private: 480 symbolHandle _h_name; 481 Handle _class_loader; 482 Handle _h_protection_domain; 483 unsigned char ** _data_ptr; 484 unsigned char ** _end_ptr; 485 JavaThread * _thread; 486 jint _curr_len; 487 unsigned char * _curr_data; 488 JvmtiEnv * _curr_env; 489 jint * _cached_length_ptr; 490 unsigned char ** _cached_data_ptr; 491 JvmtiThreadState * _state; 492 KlassHandle * _h_class_being_redefined; 493 JvmtiClassLoadKind _load_kind; 494 495 public: 496 inline JvmtiClassFileLoadHookPoster(symbolHandle h_name, Handle class_loader, 497 Handle h_protection_domain, 498 unsigned char **data_ptr, unsigned char **end_ptr, 499 unsigned char **cached_data_ptr, 500 jint *cached_length_ptr) { 501 _h_name = h_name; 502 _class_loader = class_loader; 503 _h_protection_domain = h_protection_domain; 504 _data_ptr = data_ptr; 505 _end_ptr = end_ptr; 506 _thread = JavaThread::current(); 507 _curr_len = *end_ptr - *data_ptr; 508 _curr_data = *data_ptr; 509 _curr_env = NULL; 510 _cached_length_ptr = cached_length_ptr; 511 _cached_data_ptr = cached_data_ptr; 512 *_cached_length_ptr = 0; 513 *_cached_data_ptr = NULL; 514 515 _state = _thread->jvmti_thread_state(); 516 if (_state != NULL) { 517 _h_class_being_redefined = _state->get_class_being_redefined(); 518 _load_kind = _state->get_class_load_kind(); 519 // Clear class_being_redefined flag here. The action 520 // from agent handler could generate a new class file load 521 // hook event and if it is not cleared the new event generated 522 // from regular class file load could have this stale redefined 523 // class handle info. 524 _state->clear_class_being_redefined(); 525 } else { 526 // redefine and retransform will always set the thread state 527 _h_class_being_redefined = (KlassHandle *) NULL; 528 _load_kind = jvmti_class_load_kind_load; 529 } 530 } 531 532 void post() { 533// EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, 534// ("JVMTI [%s] class file load hook event triggered", 535// JvmtiTrace::safe_get_thread_name(_thread))); 536 post_all_envs(); 537 copy_modified_data(); 538 } 539 540 private: 541 void post_all_envs() { 542 if (_load_kind != jvmti_class_load_kind_retransform) { 543 // for class load and redefine, 544 // call the non-retransformable agents 545 JvmtiEnvIterator it; 546 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 547 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 548 // non-retransformable agents cannot retransform back, 549 // so no need to cache the original class file bytes 550 post_to_env(env, false); 551 } 552 } 553 } 554 JvmtiEnvIterator it; 555 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 556 // retransformable agents get all events 557 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 558 // retransformable agents need to cache the original class file 559 // bytes if changes are made via the ClassFileLoadHook 560 post_to_env(env, true); 561 } 562 } 563 } 564 565 void post_to_env(JvmtiEnv* env, bool caching_needed) { 566 unsigned char *new_data = NULL; 567 jint new_len = 0; 568// EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, 569// ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d", 570// JvmtiTrace::safe_get_thread_name(_thread), 571// _h_name.is_null() ? "NULL" : _h_name->as_utf8(), 572// _curr_data, _curr_len )); 573 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 574 _h_protection_domain, 575 _h_class_being_redefined); 576 JvmtiJavaThreadEventTransition jet(_thread); 577 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)? 578 NULL : jem.jni_env(); 579 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 580 if (callback != NULL) { 581 (*callback)(env->jvmti_external(), jni_env, 582 jem.class_being_redefined(), 583 jem.jloader(), jem.class_name(), 584 jem.protection_domain(), 585 _curr_len, _curr_data, 586 &new_len, &new_data); 587 } 588 if (new_data != NULL) { 589 // this agent has modified class data. 590 if (caching_needed && *_cached_data_ptr == NULL) { 591 // data has been changed by the new retransformable agent 592 // and it hasn't already been cached, cache it 593 *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len); 594 memcpy(*_cached_data_ptr, _curr_data, _curr_len); 595 *_cached_length_ptr = _curr_len; 596 } 597 598 if (_curr_data != *_data_ptr) { 599 // curr_data is previous agent modified class data. 600 // And this has been changed by the new agent so 601 // we can delete it now. 602 _curr_env->Deallocate(_curr_data); 603 } 604 605 // Class file data has changed by the current agent. 606 _curr_data = new_data; 607 _curr_len = new_len; 608 // Save the current agent env we need this to deallocate the 609 // memory allocated by this agent. 610 _curr_env = env; 611 } 612 } 613 614 void copy_modified_data() { 615 // if one of the agent has modified class file data. 616 // Copy modified class data to new resources array. 617 if (_curr_data != *_data_ptr) { 618 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 619 memcpy(*_data_ptr, _curr_data, _curr_len); 620 *_end_ptr = *_data_ptr + _curr_len; 621 _curr_env->Deallocate(_curr_data); 622 } 623 } 624}; 625 626bool JvmtiExport::_should_post_class_file_load_hook = false; 627 628// this entry is for class file load hook on class load, redefine and retransform 629void JvmtiExport::post_class_file_load_hook(symbolHandle h_name, 630 Handle class_loader, 631 Handle h_protection_domain, 632 unsigned char **data_ptr, 633 unsigned char **end_ptr, 634 unsigned char **cached_data_ptr, 635 jint *cached_length_ptr) { 636 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 637 h_protection_domain, 638 data_ptr, end_ptr, 639 cached_data_ptr, 640 cached_length_ptr); 641 poster.post(); 642} 643 644void JvmtiExport::report_unsupported(bool on) { 645 // If any JVMTI service is turned on, we need to exit before native code 646 // tries to access nonexistant services. 647 if (on) { 648 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 649 } 650} 651 652 653#ifndef JVMTI_KERNEL 654static inline klassOop oop_to_klassOop(oop obj) { 655 klassOop k = obj->klass(); 656 657 // if the object is a java.lang.Class then return the java mirror 658 if (k == SystemDictionary::Class_klass()) { 659 if (!java_lang_Class::is_primitive(obj)) { 660 k = java_lang_Class::as_klassOop(obj); 661 assert(k != NULL, "class for non-primitive mirror must exist"); 662 } 663 } 664 return k; 665} 666 667class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark { 668 private: 669 jobject _jobj; 670 jlong _size; 671 public: 672 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klassOop(obj)) { 673 _jobj = (jobject)to_jobject(obj); 674 _size = obj->size() * wordSize; 675 }; 676 jobject jni_jobject() { return _jobj; } 677 jlong size() { return _size; } 678}; 679 680class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 681 private: 682 jint _code_size; 683 const void *_code_data; 684 jint _map_length; 685 jvmtiAddrLocationMap *_map; 686 const void *_compile_info; 687 public: 688 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 689 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 690 _code_data = nm->code_begin(); 691 _code_size = nm->code_size(); 692 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 693 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 694 } 695 ~JvmtiCompiledMethodLoadEventMark() { 696 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); 697 } 698 699 jint code_size() { return _code_size; } 700 const void *code_data() { return _code_data; } 701 jint map_length() { return _map_length; } 702 const jvmtiAddrLocationMap* map() { return _map; } 703 const void *compile_info() { return _compile_info; } 704}; 705 706 707 708class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 709private: 710 jobject _jobj; 711public: 712 JvmtiMonitorEventMark(JavaThread *thread, oop object) 713 : JvmtiThreadEventMark(thread){ 714 _jobj = to_jobject(object); 715 } 716 jobject jni_object() { return _jobj; } 717}; 718 719/////////////////////////////////////////////////////////////// 720// 721// pending CompiledMethodUnload support 722// 723 724bool JvmtiExport::_have_pending_compiled_method_unload_events; 725GrowableArray<jmethodID>* JvmtiExport::_pending_compiled_method_unload_method_ids; 726GrowableArray<const void *>* JvmtiExport::_pending_compiled_method_unload_code_begins; 727JavaThread* JvmtiExport::_current_poster; 728 729// post any pending CompiledMethodUnload events 730 731void JvmtiExport::post_pending_compiled_method_unload_events() { 732 JavaThread* self = JavaThread::current(); 733 assert(!self->owns_locks(), "can't hold locks"); 734 735 // Indicates if this is the first activiation of this function. 736 // In theory the profiler's callback could call back into VM and provoke 737 // another CompiledMethodLoad event to be posted from this thread. As the 738 // stack rewinds we need to ensure that the original activation does the 739 // completion and notifies any waiters. 740 bool first_activation = false; 741 742 // the jmethodID (may not be valid) to be used for a single event 743 jmethodID method; 744 const void *code_begin; 745 746 // grab the monitor and check if another thread is already posting 747 // events. If there is another thread posting events then we wait 748 // until it completes. (In theory we could check the pending events to 749 // see if any of the addresses overlap with the event that we want to 750 // post but as it will happen so rarely we just block any thread waiting 751 // to post a CompiledMethodLoad or DynamicCodeGenerated event until all 752 // pending CompiledMethodUnload events have been posted). 753 // 754 // If another thread isn't posting we examine the list of pending jmethodIDs. 755 // If the list is empty then we are done. If it's not empty then this thread 756 // (self) becomes the pending event poster and we remove the top (last) 757 // event from the list. Note that this means we remove the newest event first 758 // but as they are all CompiledMethodUnload events the order doesn't matter. 759 // Once we have removed a jmethodID then we exit the monitor. Any other thread 760 // wanting to post a CompiledMethodLoad or DynamicCodeGenerated event will 761 // be forced to wait on the monitor. 762 { 763 MutexLocker mu(JvmtiPendingEvent_lock); 764 if (_current_poster != self) { 765 while (_current_poster != NULL) { 766 JvmtiPendingEvent_lock->wait(); 767 } 768 } 769 if ((_pending_compiled_method_unload_method_ids == NULL) || 770 (_pending_compiled_method_unload_method_ids->length() == 0)) { 771 return; 772 } 773 if (_current_poster == NULL) { 774 _current_poster = self; 775 first_activation = true; 776 } else { 777 // re-entrant 778 guarantee(_current_poster == self, "checking"); 779 } 780 method = _pending_compiled_method_unload_method_ids->pop(); 781 code_begin = _pending_compiled_method_unload_code_begins->pop(); 782 } 783 784 // This thread is the pending event poster so it first posts the CompiledMethodUnload 785 // event for the jmethodID that has been removed from the list. Once posted it 786 // re-grabs the monitor and checks the list again. If the list is empty then and this 787 // is the first activation of the function then we reset the _have_pending_events 788 // flag, cleanup _current_poster to indicate that no thread is now servicing the 789 // pending events list, and finally notify any thread that might be waiting. 790 for (;;) { 791 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 792 ("JVMTI [%s] method compile unload event triggered", 793 JvmtiTrace::safe_get_thread_name(self))); 794 795 // post the event for each environment that has this event enabled. 796 JvmtiEnvIterator it; 797 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 798 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 799 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 800 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT, 801 JvmtiTrace::safe_get_thread_name(self), method)); 802 803 JvmtiEventMark jem(self); 804 JvmtiJavaThreadEventTransition jet(self); 805 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 806 if (callback != NULL) { 807 (*callback)(env->jvmti_external(), method, code_begin); 808 } 809 } 810 } 811 812 // event posted, now re-grab monitor and get the next event 813 // If there's no next event then we are done. If this is the first 814 // activiation of this function by this thread notify any waiters 815 // so that they can post. 816 { 817 MutexLocker ml(JvmtiPendingEvent_lock); 818 if (_pending_compiled_method_unload_method_ids->length() == 0) { 819 if (first_activation) { 820 _have_pending_compiled_method_unload_events = false; 821 _current_poster = NULL; 822 JvmtiPendingEvent_lock->notify_all(); 823 } 824 return; 825 } 826 method = _pending_compiled_method_unload_method_ids->pop(); 827 code_begin = _pending_compiled_method_unload_code_begins->pop(); 828 } 829 } 830} 831 832/////////////////////////////////////////////////////////////// 833// 834// JvmtiExport 835// 836 837void JvmtiExport::post_raw_breakpoint(JavaThread *thread, methodOop method, address location) { 838 HandleMark hm(thread); 839 methodHandle mh(thread, method); 840 841 JvmtiThreadState *state = thread->jvmti_thread_state(); 842 if (state == NULL) { 843 return; 844 } 845 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered", 846 JvmtiTrace::safe_get_thread_name(thread))); 847 JvmtiEnvThreadStateIterator it(state); 848 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 849 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 850 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 851 ThreadState old_os_state = thread->osthread()->get_state(); 852 thread->osthread()->set_state(BREAKPOINTED); 853 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d", 854 JvmtiTrace::safe_get_thread_name(thread), 855 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 856 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 857 location - mh()->code_base() )); 858 859 JvmtiEnv *env = ets->get_env(); 860 JvmtiLocationEventMark jem(thread, mh, location); 861 JvmtiJavaThreadEventTransition jet(thread); 862 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 863 if (callback != NULL) { 864 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 865 jem.jni_methodID(), jem.location()); 866 } 867 868 ets->set_breakpoint_posted(); 869 thread->osthread()->set_state(old_os_state); 870 } 871 } 872} 873 874////////////////////////////////////////////////////////////////////////////// 875 876bool JvmtiExport::_can_get_source_debug_extension = false; 877bool JvmtiExport::_can_maintain_original_method_order = false; 878bool JvmtiExport::_can_post_interpreter_events = false; 879bool JvmtiExport::_can_post_on_exceptions = false; 880bool JvmtiExport::_can_post_breakpoint = false; 881bool JvmtiExport::_can_post_field_access = false; 882bool JvmtiExport::_can_post_field_modification = false; 883bool JvmtiExport::_can_post_method_entry = false; 884bool JvmtiExport::_can_post_method_exit = false; 885bool JvmtiExport::_can_pop_frame = false; 886bool JvmtiExport::_can_force_early_return = false; 887 888bool JvmtiExport::_should_post_single_step = false; 889bool JvmtiExport::_should_post_field_access = false; 890bool JvmtiExport::_should_post_field_modification = false; 891bool JvmtiExport::_should_post_class_load = false; 892bool JvmtiExport::_should_post_class_prepare = false; 893bool JvmtiExport::_should_post_class_unload = false; 894bool JvmtiExport::_should_post_thread_life = false; 895bool JvmtiExport::_should_clean_up_heap_objects = false; 896bool JvmtiExport::_should_post_native_method_bind = false; 897bool JvmtiExport::_should_post_dynamic_code_generated = false; 898bool JvmtiExport::_should_post_data_dump = false; 899bool JvmtiExport::_should_post_compiled_method_load = false; 900bool JvmtiExport::_should_post_compiled_method_unload = false; 901bool JvmtiExport::_should_post_monitor_contended_enter = false; 902bool JvmtiExport::_should_post_monitor_contended_entered = false; 903bool JvmtiExport::_should_post_monitor_wait = false; 904bool JvmtiExport::_should_post_monitor_waited = false; 905bool JvmtiExport::_should_post_garbage_collection_start = false; 906bool JvmtiExport::_should_post_garbage_collection_finish = false; 907bool JvmtiExport::_should_post_object_free = false; 908bool JvmtiExport::_should_post_resource_exhausted = false; 909bool JvmtiExport::_should_post_vm_object_alloc = false; 910bool JvmtiExport::_should_post_on_exceptions = false; 911 912//////////////////////////////////////////////////////////////////////////////////////////////// 913 914 915// 916// JVMTI single step management 917// 918void JvmtiExport::at_single_stepping_point(JavaThread *thread, methodOop method, address location) { 919 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 920 921 HandleMark hm(thread); 922 methodHandle mh(thread, method); 923 924 // update information about current location and post a step event 925 JvmtiThreadState *state = thread->jvmti_thread_state(); 926 if (state == NULL) { 927 return; 928 } 929 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered", 930 JvmtiTrace::safe_get_thread_name(thread))); 931 if (!state->hide_single_stepping()) { 932 if (state->is_pending_step_for_popframe()) { 933 state->process_pending_step_for_popframe(); 934 } 935 if (state->is_pending_step_for_earlyret()) { 936 state->process_pending_step_for_earlyret(); 937 } 938 JvmtiExport::post_single_step(thread, mh(), location); 939 } 940} 941 942 943void JvmtiExport::expose_single_stepping(JavaThread *thread) { 944 JvmtiThreadState *state = thread->jvmti_thread_state(); 945 if (state != NULL) { 946 state->clear_hide_single_stepping(); 947 } 948} 949 950 951bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 952 JvmtiThreadState *state = thread->jvmti_thread_state(); 953 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 954 state->set_hide_single_stepping(); 955 return true; 956 } else { 957 return false; 958 } 959} 960 961void JvmtiExport::post_class_load(JavaThread *thread, klassOop klass) { 962 HandleMark hm(thread); 963 KlassHandle kh(thread, klass); 964 965 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered", 966 JvmtiTrace::safe_get_thread_name(thread))); 967 JvmtiThreadState* state = thread->jvmti_thread_state(); 968 if (state == NULL) { 969 return; 970 } 971 JvmtiEnvThreadStateIterator it(state); 972 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 973 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 974 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s", 975 JvmtiTrace::safe_get_thread_name(thread), 976 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); 977 978 JvmtiEnv *env = ets->get_env(); 979 JvmtiClassEventMark jem(thread, kh()); 980 JvmtiJavaThreadEventTransition jet(thread); 981 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 982 if (callback != NULL) { 983 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 984 } 985 } 986 } 987} 988 989 990void JvmtiExport::post_class_prepare(JavaThread *thread, klassOop klass) { 991 HandleMark hm(thread); 992 KlassHandle kh(thread, klass); 993 994 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered", 995 JvmtiTrace::safe_get_thread_name(thread))); 996 JvmtiThreadState* state = thread->jvmti_thread_state(); 997 if (state == NULL) { 998 return; 999 } 1000 JvmtiEnvThreadStateIterator it(state); 1001 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1002 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 1003 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s", 1004 JvmtiTrace::safe_get_thread_name(thread), 1005 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); 1006 1007 JvmtiEnv *env = ets->get_env(); 1008 JvmtiClassEventMark jem(thread, kh()); 1009 JvmtiJavaThreadEventTransition jet(thread); 1010 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 1011 if (callback != NULL) { 1012 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1013 } 1014 } 1015 } 1016} 1017 1018void JvmtiExport::post_class_unload(klassOop klass) { 1019 Thread *thread = Thread::current(); 1020 HandleMark hm(thread); 1021 KlassHandle kh(thread, klass); 1022 1023 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" )); 1024 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1025 assert(thread->is_VM_thread(), "wrong thread"); 1026 1027 // get JavaThread for whom we are proxy 1028 JavaThread *real_thread = 1029 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread(); 1030 1031 JvmtiEnvIterator it; 1032 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1033 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1034 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s", 1035 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); 1036 1037 // do everything manually, since this is a proxy - needs special care 1038 JNIEnv* jni_env = real_thread->jni_environment(); 1039 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); 1040 jclass jk = (jclass)JNIHandles::make_local(real_thread, Klass::cast(kh())->java_mirror()); 1041 1042 // Before we call the JVMTI agent, we have to set the state in the 1043 // thread for which we are proxying. 1044 JavaThreadState prev_state = real_thread->thread_state(); 1045 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint"); 1046 real_thread->set_thread_state(_thread_in_native); 1047 1048 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 1049 if (callback != NULL) { 1050 (*callback)(env->jvmti_external(), jni_env, jt, jk); 1051 } 1052 1053 assert(real_thread->thread_state() == _thread_in_native, 1054 "JavaThread should be in native"); 1055 real_thread->set_thread_state(prev_state); 1056 1057 JNIHandles::destroy_local(jk); 1058 JNIHandles::destroy_local(jt); 1059 } 1060 } 1061 } 1062} 1063 1064 1065void JvmtiExport::post_thread_start(JavaThread *thread) { 1066 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1067 1068 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered", 1069 JvmtiTrace::safe_get_thread_name(thread))); 1070 1071 // do JVMTI thread initialization (if needed) 1072 JvmtiEventController::thread_started(thread); 1073 1074 // Do not post thread start event for hidden java thread. 1075 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1076 !thread->is_hidden_from_external_view()) { 1077 JvmtiEnvIterator it; 1078 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1079 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1080 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent", 1081 JvmtiTrace::safe_get_thread_name(thread) )); 1082 1083 JvmtiThreadEventMark jem(thread); 1084 JvmtiJavaThreadEventTransition jet(thread); 1085 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1086 if (callback != NULL) { 1087 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1088 } 1089 } 1090 } 1091 } 1092} 1093 1094 1095void JvmtiExport::post_thread_end(JavaThread *thread) { 1096 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered", 1097 JvmtiTrace::safe_get_thread_name(thread))); 1098 1099 JvmtiThreadState *state = thread->jvmti_thread_state(); 1100 if (state == NULL) { 1101 return; 1102 } 1103 1104 // Do not post thread end event for hidden java thread. 1105 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1106 !thread->is_hidden_from_external_view()) { 1107 1108 JvmtiEnvThreadStateIterator it(state); 1109 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1110 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1111 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent", 1112 JvmtiTrace::safe_get_thread_name(thread) )); 1113 1114 JvmtiEnv *env = ets->get_env(); 1115 JvmtiThreadEventMark jem(thread); 1116 JvmtiJavaThreadEventTransition jet(thread); 1117 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1118 if (callback != NULL) { 1119 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1120 } 1121 } 1122 } 1123 } 1124} 1125 1126void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1127 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1128 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1129 1130 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" )); 1131 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent")); 1132 1133 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1134 if (callback != NULL) { 1135 (*callback)(env->jvmti_external(), tag); 1136 } 1137} 1138 1139void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1140 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" )); 1141 1142 JvmtiEnvIterator it; 1143 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1144 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1145 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" )); 1146 1147 JavaThread *thread = JavaThread::current(); 1148 JvmtiThreadEventMark jem(thread); 1149 JvmtiJavaThreadEventTransition jet(thread); 1150 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1151 if (callback != NULL) { 1152 (*callback)(env->jvmti_external(), jem.jni_env(), 1153 resource_exhausted_flags, NULL, description); 1154 } 1155 } 1156 } 1157} 1158 1159void JvmtiExport::post_method_entry(JavaThread *thread, methodOop method, frame current_frame) { 1160 HandleMark hm(thread); 1161 methodHandle mh(thread, method); 1162 1163 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s", 1164 JvmtiTrace::safe_get_thread_name(thread), 1165 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1166 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1167 1168 JvmtiThreadState* state = thread->jvmti_thread_state(); 1169 if (state == NULL || !state->is_interp_only_mode()) { 1170 // for any thread that actually wants method entry, interp_only_mode is set 1171 return; 1172 } 1173 1174 state->incr_cur_stack_depth(); 1175 1176 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1177 JvmtiEnvThreadStateIterator it(state); 1178 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1179 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1180 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s", 1181 JvmtiTrace::safe_get_thread_name(thread), 1182 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1183 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1184 1185 JvmtiEnv *env = ets->get_env(); 1186 JvmtiMethodEventMark jem(thread, mh); 1187 JvmtiJavaThreadEventTransition jet(thread); 1188 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1189 if (callback != NULL) { 1190 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1191 } 1192 } 1193 } 1194 } 1195} 1196 1197void JvmtiExport::post_method_exit(JavaThread *thread, methodOop method, frame current_frame) { 1198 HandleMark hm(thread); 1199 methodHandle mh(thread, method); 1200 1201 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s", 1202 JvmtiTrace::safe_get_thread_name(thread), 1203 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1204 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1205 1206 JvmtiThreadState *state = thread->jvmti_thread_state(); 1207 if (state == NULL || !state->is_interp_only_mode()) { 1208 // for any thread that actually wants method exit, interp_only_mode is set 1209 return; 1210 } 1211 1212 // return a flag when a method terminates by throwing an exception 1213 // i.e. if an exception is thrown and it's not caught by the current method 1214 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1215 1216 1217 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1218 Handle result; 1219 jvalue value; 1220 value.j = 0L; 1221 1222 // if the method hasn't been popped because of an exception then we populate 1223 // the return_value parameter for the callback. At this point we only have 1224 // the address of a "raw result" and we just call into the interpreter to 1225 // convert this into a jvalue. 1226 if (!exception_exit) { 1227 oop oop_result; 1228 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1229 if (type == T_OBJECT || type == T_ARRAY) { 1230 result = Handle(thread, oop_result); 1231 } 1232 } 1233 1234 JvmtiEnvThreadStateIterator it(state); 1235 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1236 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1237 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s", 1238 JvmtiTrace::safe_get_thread_name(thread), 1239 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1240 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1241 1242 JvmtiEnv *env = ets->get_env(); 1243 JvmtiMethodEventMark jem(thread, mh); 1244 if (result.not_null()) { 1245 value.l = JNIHandles::make_local(thread, result()); 1246 } 1247 JvmtiJavaThreadEventTransition jet(thread); 1248 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1249 if (callback != NULL) { 1250 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1251 jem.jni_methodID(), exception_exit, value); 1252 } 1253 } 1254 } 1255 } 1256 1257 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1258 JvmtiEnvThreadStateIterator it(state); 1259 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1260 int cur_frame_number = state->cur_stack_depth(); 1261 1262 if (ets->is_frame_pop(cur_frame_number)) { 1263 // we have a NotifyFramePop entry for this frame. 1264 // now check that this env/thread wants this event 1265 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1266 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s", 1267 JvmtiTrace::safe_get_thread_name(thread), 1268 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1269 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1270 1271 // we also need to issue a frame pop event for this frame 1272 JvmtiEnv *env = ets->get_env(); 1273 JvmtiMethodEventMark jem(thread, mh); 1274 JvmtiJavaThreadEventTransition jet(thread); 1275 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1276 if (callback != NULL) { 1277 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1278 jem.jni_methodID(), exception_exit); 1279 } 1280 } 1281 // remove the frame's entry 1282 ets->clear_frame_pop(cur_frame_number); 1283 } 1284 } 1285 } 1286 1287 state->decr_cur_stack_depth(); 1288} 1289 1290 1291// Todo: inline this for optimization 1292void JvmtiExport::post_single_step(JavaThread *thread, methodOop method, address location) { 1293 HandleMark hm(thread); 1294 methodHandle mh(thread, method); 1295 1296 JvmtiThreadState *state = thread->jvmti_thread_state(); 1297 if (state == NULL) { 1298 return; 1299 } 1300 JvmtiEnvThreadStateIterator it(state); 1301 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1302 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1303 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1304 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d", 1305 JvmtiTrace::safe_get_thread_name(thread), 1306 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1307 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1308 location - mh()->code_base() )); 1309 1310 JvmtiEnv *env = ets->get_env(); 1311 JvmtiLocationEventMark jem(thread, mh, location); 1312 JvmtiJavaThreadEventTransition jet(thread); 1313 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1314 if (callback != NULL) { 1315 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1316 jem.jni_methodID(), jem.location()); 1317 } 1318 1319 ets->set_single_stepping_posted(); 1320 } 1321 } 1322} 1323 1324 1325void JvmtiExport::post_exception_throw(JavaThread *thread, methodOop method, address location, oop exception) { 1326 HandleMark hm(thread); 1327 methodHandle mh(thread, method); 1328 Handle exception_handle(thread, exception); 1329 1330 JvmtiThreadState *state = thread->jvmti_thread_state(); 1331 if (state == NULL) { 1332 return; 1333 } 1334 1335 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered", 1336 JvmtiTrace::safe_get_thread_name(thread))); 1337 if (!state->is_exception_detected()) { 1338 state->set_exception_detected(); 1339 JvmtiEnvThreadStateIterator it(state); 1340 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1341 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1342 1343 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1344 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d", 1345 JvmtiTrace::safe_get_thread_name(thread), 1346 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1347 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1348 location - mh()->code_base() )); 1349 1350 JvmtiEnv *env = ets->get_env(); 1351 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1352 1353 // It's okay to clear these exceptions here because we duplicate 1354 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1355 EXCEPTION_MARK; 1356 1357 bool should_repeat; 1358 vframeStream st(thread); 1359 assert(!st.at_end(), "cannot be at end"); 1360 methodOop current_method = NULL; 1361 int current_bci = -1; 1362 do { 1363 current_method = st.method(); 1364 current_bci = st.bci(); 1365 do { 1366 should_repeat = false; 1367 KlassHandle eh_klass(thread, exception_handle()->klass()); 1368 current_bci = current_method->fast_exception_handler_bci_for( 1369 eh_klass, current_bci, THREAD); 1370 if (HAS_PENDING_EXCEPTION) { 1371 exception_handle = KlassHandle(thread, PENDING_EXCEPTION); 1372 CLEAR_PENDING_EXCEPTION; 1373 should_repeat = true; 1374 } 1375 } while (should_repeat && (current_bci != -1)); 1376 st.next(); 1377 } while ((current_bci < 0) && (!st.at_end())); 1378 1379 jmethodID catch_jmethodID; 1380 if (current_bci < 0) { 1381 catch_jmethodID = 0; 1382 current_bci = 0; 1383 } else { 1384 catch_jmethodID = jem.to_jmethodID( 1385 methodHandle(thread, current_method)); 1386 } 1387 1388 JvmtiJavaThreadEventTransition jet(thread); 1389 jvmtiEventException callback = env->callbacks()->Exception; 1390 if (callback != NULL) { 1391 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1392 jem.jni_methodID(), jem.location(), 1393 jem.exception(), 1394 catch_jmethodID, current_bci); 1395 } 1396 } 1397 } 1398 } 1399 1400 // frames may get popped because of this throw, be safe - invalidate cached depth 1401 state->invalidate_cur_stack_depth(); 1402} 1403 1404 1405void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) { 1406 HandleMark hm(thread); 1407 methodHandle mh(thread, method); 1408 Handle exception_handle(thread, exception); 1409 1410 JvmtiThreadState *state = thread->jvmti_thread_state(); 1411 if (state == NULL) { 1412 return; 1413 } 1414 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1415 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s", 1416 JvmtiTrace::safe_get_thread_name(thread), 1417 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1418 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1419 location==0? "no location:" : "", 1420 location==0? 0 : location - mh()->code_base(), 1421 in_handler_frame? "in handler frame" : "not handler frame" )); 1422 1423 if (state->is_exception_detected()) { 1424 1425 state->invalidate_cur_stack_depth(); 1426 if (!in_handler_frame) { 1427 // Not in exception handler. 1428 if(state->is_interp_only_mode()) { 1429 // method exit and frame pop events are posted only in interp mode. 1430 // When these events are enabled code should be in running in interp mode. 1431 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1432 // The cached cur_stack_depth might have changed from the 1433 // operations of frame pop or method exit. We are not 100% sure 1434 // the cached cur_stack_depth is still valid depth so invalidate 1435 // it. 1436 state->invalidate_cur_stack_depth(); 1437 } 1438 } else { 1439 // In exception handler frame. Report exception catch. 1440 assert(location != NULL, "must be a known location"); 1441 // Update cur_stack_depth - the frames above the current frame 1442 // have been unwound due to this exception: 1443 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1444 state->set_exception_caught(); 1445 1446 JvmtiEnvThreadStateIterator it(state); 1447 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1448 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1449 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1450 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d", 1451 JvmtiTrace::safe_get_thread_name(thread), 1452 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1453 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1454 location - mh()->code_base() )); 1455 1456 JvmtiEnv *env = ets->get_env(); 1457 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1458 JvmtiJavaThreadEventTransition jet(thread); 1459 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1460 if (callback != NULL) { 1461 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1462 jem.jni_methodID(), jem.location(), 1463 jem.exception()); 1464 } 1465 } 1466 } 1467 } 1468 } 1469} 1470 1471oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1472 klassOop klass, jfieldID fieldID, bool is_static) { 1473 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1474 // At least one field access watch is set so we have more work 1475 // to do. This wrapper is used by entry points that allow us 1476 // to create handles in post_field_access_by_jni(). 1477 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1478 // event posting can block so refetch oop if we were passed a jobj 1479 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1480 } 1481 return obj; 1482} 1483 1484oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1485 klassOop klass, jfieldID fieldID, bool is_static) { 1486 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1487 // At least one field access watch is set so we have more work 1488 // to do. This wrapper is used by "quick" entry points that don't 1489 // allow us to create handles in post_field_access_by_jni(). We 1490 // override that with a ResetNoHandleMark. 1491 ResetNoHandleMark rnhm; 1492 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1493 // event posting can block so refetch oop if we were passed a jobj 1494 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1495 } 1496 return obj; 1497} 1498 1499void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1500 klassOop klass, jfieldID fieldID, bool is_static) { 1501 // We must be called with a Java context in order to provide reasonable 1502 // values for the klazz, method, and location fields. The callers of this 1503 // function don't make the call unless there is a Java context. 1504 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1505 1506 ResourceMark rm; 1507 fieldDescriptor fd; 1508 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1509 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1510 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1511 if (!valid_fieldID) return; 1512 // field accesses are not watched so bail 1513 if (!fd.is_field_access_watched()) return; 1514 1515 HandleMark hm(thread); 1516 KlassHandle h_klass(thread, klass); 1517 Handle h_obj; 1518 if (!is_static) { 1519 // non-static field accessors have an object, but we need a handle 1520 assert(obj != NULL, "non-static needs an object"); 1521 h_obj = Handle(thread, obj); 1522 } 1523 post_field_access(thread, 1524 thread->last_frame().interpreter_frame_method(), 1525 thread->last_frame().interpreter_frame_bcp(), 1526 h_klass, h_obj, fieldID); 1527} 1528 1529void JvmtiExport::post_field_access(JavaThread *thread, methodOop method, 1530 address location, KlassHandle field_klass, Handle object, jfieldID field) { 1531 1532 HandleMark hm(thread); 1533 methodHandle mh(thread, method); 1534 1535 JvmtiThreadState *state = thread->jvmti_thread_state(); 1536 if (state == NULL) { 1537 return; 1538 } 1539 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered", 1540 JvmtiTrace::safe_get_thread_name(thread))); 1541 JvmtiEnvThreadStateIterator it(state); 1542 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1543 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1544 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d", 1545 JvmtiTrace::safe_get_thread_name(thread), 1546 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1547 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1548 location - mh()->code_base() )); 1549 1550 JvmtiEnv *env = ets->get_env(); 1551 JvmtiLocationEventMark jem(thread, mh, location); 1552 jclass field_jclass = jem.to_jclass(field_klass()); 1553 jobject field_jobject = jem.to_jobject(object()); 1554 JvmtiJavaThreadEventTransition jet(thread); 1555 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1556 if (callback != NULL) { 1557 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1558 jem.jni_methodID(), jem.location(), 1559 field_jclass, field_jobject, field); 1560 } 1561 } 1562 } 1563} 1564 1565oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1566 klassOop klass, jfieldID fieldID, bool is_static, 1567 char sig_type, jvalue *value) { 1568 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1569 // At least one field modification watch is set so we have more work 1570 // to do. This wrapper is used by entry points that allow us 1571 // to create handles in post_field_modification_by_jni(). 1572 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1573 // event posting can block so refetch oop if we were passed a jobj 1574 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1575 } 1576 return obj; 1577} 1578 1579oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1580 klassOop klass, jfieldID fieldID, bool is_static, 1581 char sig_type, jvalue *value) { 1582 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1583 // At least one field modification watch is set so we have more work 1584 // to do. This wrapper is used by "quick" entry points that don't 1585 // allow us to create handles in post_field_modification_by_jni(). We 1586 // override that with a ResetNoHandleMark. 1587 ResetNoHandleMark rnhm; 1588 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1589 // event posting can block so refetch oop if we were passed a jobj 1590 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1591 } 1592 return obj; 1593} 1594 1595void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1596 klassOop klass, jfieldID fieldID, bool is_static, 1597 char sig_type, jvalue *value) { 1598 // We must be called with a Java context in order to provide reasonable 1599 // values for the klazz, method, and location fields. The callers of this 1600 // function don't make the call unless there is a Java context. 1601 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1602 1603 ResourceMark rm; 1604 fieldDescriptor fd; 1605 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1606 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1607 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1608 if (!valid_fieldID) return; 1609 // field modifications are not watched so bail 1610 if (!fd.is_field_modification_watched()) return; 1611 1612 HandleMark hm(thread); 1613 1614 Handle h_obj; 1615 if (!is_static) { 1616 // non-static field accessors have an object, but we need a handle 1617 assert(obj != NULL, "non-static needs an object"); 1618 h_obj = Handle(thread, obj); 1619 } 1620 KlassHandle h_klass(thread, klass); 1621 post_field_modification(thread, 1622 thread->last_frame().interpreter_frame_method(), 1623 thread->last_frame().interpreter_frame_bcp(), 1624 h_klass, h_obj, fieldID, sig_type, value); 1625} 1626 1627void JvmtiExport::post_raw_field_modification(JavaThread *thread, methodOop method, 1628 address location, KlassHandle field_klass, Handle object, jfieldID field, 1629 char sig_type, jvalue *value) { 1630 1631 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') { 1632 // 'I' instructions are used for byte, char, short and int. 1633 // determine which it really is, and convert 1634 fieldDescriptor fd; 1635 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd); 1636 // should be found (if not, leave as is) 1637 if (found) { 1638 jint ival = value->i; 1639 // convert value from int to appropriate type 1640 switch (fd.field_type()) { 1641 case T_BOOLEAN: 1642 sig_type = 'Z'; 1643 value->i = 0; // clear it 1644 value->z = (jboolean)ival; 1645 break; 1646 case T_BYTE: 1647 sig_type = 'B'; 1648 value->i = 0; // clear it 1649 value->b = (jbyte)ival; 1650 break; 1651 case T_CHAR: 1652 sig_type = 'C'; 1653 value->i = 0; // clear it 1654 value->c = (jchar)ival; 1655 break; 1656 case T_SHORT: 1657 sig_type = 'S'; 1658 value->i = 0; // clear it 1659 value->s = (jshort)ival; 1660 break; 1661 case T_INT: 1662 // nothing to do 1663 break; 1664 default: 1665 // this is an integer instruction, should be one of above 1666 ShouldNotReachHere(); 1667 break; 1668 } 1669 } 1670 } 1671 1672 // convert oop to JNI handle. 1673 if (sig_type == 'L' || sig_type == '[') { 1674 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 1675 } 1676 1677 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 1678 1679 // Destroy the JNI handle allocated above. 1680 if (sig_type == 'L') { 1681 JNIHandles::destroy_local(value->l); 1682 } 1683} 1684 1685void JvmtiExport::post_field_modification(JavaThread *thread, methodOop method, 1686 address location, KlassHandle field_klass, Handle object, jfieldID field, 1687 char sig_type, jvalue *value_ptr) { 1688 1689 HandleMark hm(thread); 1690 methodHandle mh(thread, method); 1691 1692 JvmtiThreadState *state = thread->jvmti_thread_state(); 1693 if (state == NULL) { 1694 return; 1695 } 1696 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1697 ("JVMTI [%s] Trg Field Modification event triggered", 1698 JvmtiTrace::safe_get_thread_name(thread))); 1699 1700 JvmtiEnvThreadStateIterator it(state); 1701 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1702 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 1703 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1704 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d", 1705 JvmtiTrace::safe_get_thread_name(thread), 1706 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1707 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1708 location - mh()->code_base() )); 1709 1710 JvmtiEnv *env = ets->get_env(); 1711 JvmtiLocationEventMark jem(thread, mh, location); 1712 jclass field_jclass = jem.to_jclass(field_klass()); 1713 jobject field_jobject = jem.to_jobject(object()); 1714 JvmtiJavaThreadEventTransition jet(thread); 1715 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 1716 if (callback != NULL) { 1717 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1718 jem.jni_methodID(), jem.location(), 1719 field_jclass, field_jobject, field, sig_type, *value_ptr); 1720 } 1721 } 1722 } 1723} 1724 1725void JvmtiExport::post_native_method_bind(methodOop method, address* function_ptr) { 1726 JavaThread* thread = JavaThread::current(); 1727 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1728 1729 HandleMark hm(thread); 1730 methodHandle mh(thread, method); 1731 1732 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered", 1733 JvmtiTrace::safe_get_thread_name(thread))); 1734 1735 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1736 JvmtiEnvIterator it; 1737 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1738 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1739 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent", 1740 JvmtiTrace::safe_get_thread_name(thread) )); 1741 1742 JvmtiMethodEventMark jem(thread, mh); 1743 JvmtiJavaThreadEventTransition jet(thread); 1744 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env(); 1745 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 1746 if (callback != NULL) { 1747 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 1748 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 1749 } 1750 } 1751 } 1752 } 1753} 1754 1755// Returns a record containing inlining information for the given nmethod 1756jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 1757 jint numstackframes = 0; 1758 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 1759 record->header.kind = JVMTI_CMLR_INLINE_INFO; 1760 record->header.next = NULL; 1761 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 1762 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 1763 record->numpcs = 0; 1764 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1765 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1766 record->numpcs++; 1767 } 1768 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 1769 int scope = 0; 1770 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1771 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1772 void* pc_address = (void*)p->real_pc(nm); 1773 assert(pc_address != NULL, "pc_address must be non-null"); 1774 record->pcinfo[scope].pc = pc_address; 1775 numstackframes=0; 1776 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1777 numstackframes++; 1778 } 1779 assert(numstackframes != 0, "numstackframes must be nonzero."); 1780 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 1781 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 1782 record->pcinfo[scope].numstackframes = numstackframes; 1783 int stackframe = 0; 1784 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1785 // 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() 1786 assert(!sd->method().is_null(), "sd->method() cannot be null."); 1787 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 1788 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 1789 stackframe++; 1790 } 1791 scope++; 1792 } 1793 return record; 1794} 1795 1796void JvmtiExport::post_compiled_method_load(nmethod *nm) { 1797 // If there are pending CompiledMethodUnload events then these are 1798 // posted before this CompiledMethodLoad event. We "lock" the nmethod and 1799 // maintain a handle to the methodOop to ensure that the nmethod isn't 1800 // flushed or unloaded while posting the events. 1801 JavaThread* thread = JavaThread::current(); 1802 if (have_pending_compiled_method_unload_events()) { 1803 methodHandle mh(thread, nm->method()); 1804 nmethodLocker nml(nm); 1805 post_pending_compiled_method_unload_events(); 1806 } 1807 1808 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1809 ("JVMTI [%s] method compile load event triggered", 1810 JvmtiTrace::safe_get_thread_name(thread))); 1811 1812 JvmtiEnvIterator it; 1813 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1814 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1815 1816 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1817 ("JVMTI [%s] class compile method load event sent %s.%s ", 1818 JvmtiTrace::safe_get_thread_name(thread), 1819 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 1820 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 1821 1822 ResourceMark rm(thread); 1823 1824 // Add inlining information 1825 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 1826 // Pass inlining information through the void pointer 1827 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 1828 JvmtiJavaThreadEventTransition jet(thread); 1829 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1830 if (callback != NULL) { 1831 (*callback)(env->jvmti_external(), jem.jni_methodID(), 1832 jem.code_size(), jem.code_data(), jem.map_length(), 1833 jem.map(), jem.compile_info()); 1834 } 1835 } 1836 } 1837} 1838 1839 1840// post a COMPILED_METHOD_LOAD event for a given environment 1841void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, 1842 const void *code_begin, const jint map_length, 1843 const jvmtiAddrLocationMap* map) 1844{ 1845 JavaThread* thread = JavaThread::current(); 1846 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1847 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)", 1848 JvmtiTrace::safe_get_thread_name(thread))); 1849 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1850 1851 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1852 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT, 1853 JvmtiTrace::safe_get_thread_name(thread), method)); 1854 1855 JvmtiEventMark jem(thread); 1856 JvmtiJavaThreadEventTransition jet(thread); 1857 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1858 if (callback != NULL) { 1859 (*callback)(env->jvmti_external(), method, 1860 length, code_begin, map_length, 1861 map, NULL); 1862 } 1863 } 1864} 1865 1866// used at a safepoint to post a CompiledMethodUnload event 1867void JvmtiExport::post_compiled_method_unload_at_safepoint(jmethodID mid, const void *code_begin) { 1868 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint"); 1869 1870 // create list lazily 1871 if (_pending_compiled_method_unload_method_ids == NULL) { 1872 _pending_compiled_method_unload_method_ids = new (ResourceObj::C_HEAP) GrowableArray<jmethodID>(10,true); 1873 _pending_compiled_method_unload_code_begins = new (ResourceObj::C_HEAP) GrowableArray<const void *>(10,true); 1874 } 1875 _pending_compiled_method_unload_method_ids->append(mid); 1876 _pending_compiled_method_unload_code_begins->append(code_begin); 1877 _have_pending_compiled_method_unload_events = true; 1878} 1879 1880void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 1881 JavaThread* thread = JavaThread::current(); 1882 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1883 ("JVMTI [%s] method dynamic code generated event triggered", 1884 JvmtiTrace::safe_get_thread_name(thread))); 1885 JvmtiEnvIterator it; 1886 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1887 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1888 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1889 ("JVMTI [%s] dynamic code generated event sent for %s", 1890 JvmtiTrace::safe_get_thread_name(thread), name)); 1891 JvmtiEventMark jem(thread); 1892 JvmtiJavaThreadEventTransition jet(thread); 1893 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1894 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1895 if (callback != NULL) { 1896 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1897 } 1898 } 1899 } 1900} 1901 1902void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 1903 // In theory everyone coming thru here is in_vm but we need to be certain 1904 // because a callee will do a vm->native transition 1905 ThreadInVMfromUnknown __tiv; 1906 jvmtiPhase phase = JvmtiEnv::get_phase(); 1907 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 1908 post_dynamic_code_generated_internal(name, code_begin, code_end); 1909 return; 1910 } 1911 1912 if (have_pending_compiled_method_unload_events()) { 1913 post_pending_compiled_method_unload_events(); 1914 } 1915 post_dynamic_code_generated_internal(name, code_begin, code_end); 1916} 1917 1918 1919// post a DYNAMIC_CODE_GENERATED event for a given environment 1920// used by GenerateEvents 1921void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 1922 const void *code_begin, const void *code_end) 1923{ 1924 JavaThread* thread = JavaThread::current(); 1925 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1926 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)", 1927 JvmtiTrace::safe_get_thread_name(thread))); 1928 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1929 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1930 ("JVMTI [%s] dynamic code generated event sent for %s", 1931 JvmtiTrace::safe_get_thread_name(thread), name)); 1932 JvmtiEventMark jem(thread); 1933 JvmtiJavaThreadEventTransition jet(thread); 1934 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1935 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1936 if (callback != NULL) { 1937 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1938 } 1939 } 1940} 1941 1942// post a DynamicCodeGenerated event while holding locks in the VM. 1943void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 1944 address code_begin, address code_end) 1945{ 1946 // register the stub with the current dynamic code event collector 1947 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 1948 // state can only be NULL if the current thread is exiting which 1949 // should not happen since we're trying to post an event 1950 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 1951 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 1952 guarantee(collector != NULL, "attempt to register stub without event collector"); 1953 collector->register_stub(name, code_begin, code_end); 1954} 1955 1956// Collect all the vm internally allocated objects which are visible to java world 1957void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 1958 Thread* thread = ThreadLocalStorage::thread(); 1959 if (thread != NULL && thread->is_Java_thread()) { 1960 // Can not take safepoint here. 1961 No_Safepoint_Verifier no_sfpt; 1962 // Can not take safepoint here so can not use state_for to get 1963 // jvmti thread state. 1964 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 1965 if (state != NULL ) { 1966 // state is non NULL when VMObjectAllocEventCollector is enabled. 1967 JvmtiVMObjectAllocEventCollector *collector; 1968 collector = state->get_vm_object_alloc_event_collector(); 1969 if (collector != NULL && collector->is_enabled()) { 1970 // Don't record classes as these will be notified via the ClassLoad 1971 // event. 1972 if (obj->klass() != SystemDictionary::Class_klass()) { 1973 collector->record_allocation(obj); 1974 } 1975 } 1976 } 1977 } 1978} 1979 1980void JvmtiExport::post_garbage_collection_finish() { 1981 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 1982 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 1983 ("JVMTI [%s] garbage collection finish event triggered", 1984 JvmtiTrace::safe_get_thread_name(thread))); 1985 JvmtiEnvIterator it; 1986 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1987 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 1988 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 1989 ("JVMTI [%s] garbage collection finish event sent ", 1990 JvmtiTrace::safe_get_thread_name(thread))); 1991 JvmtiThreadEventTransition jet(thread); 1992 // JNIEnv is NULL here because this event is posted from VM Thread 1993 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 1994 if (callback != NULL) { 1995 (*callback)(env->jvmti_external()); 1996 } 1997 } 1998 } 1999} 2000 2001void JvmtiExport::post_garbage_collection_start() { 2002 Thread* thread = Thread::current(); // this event is posted from vm-thread. 2003 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2004 ("JVMTI [%s] garbage collection start event triggered", 2005 JvmtiTrace::safe_get_thread_name(thread))); 2006 JvmtiEnvIterator it; 2007 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2008 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 2009 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2010 ("JVMTI [%s] garbage collection start event sent ", 2011 JvmtiTrace::safe_get_thread_name(thread))); 2012 JvmtiThreadEventTransition jet(thread); 2013 // JNIEnv is NULL here because this event is posted from VM Thread 2014 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 2015 if (callback != NULL) { 2016 (*callback)(env->jvmti_external()); 2017 } 2018 } 2019 } 2020} 2021 2022void JvmtiExport::post_data_dump() { 2023 Thread *thread = Thread::current(); 2024 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2025 ("JVMTI [%s] data dump request event triggered", 2026 JvmtiTrace::safe_get_thread_name(thread))); 2027 JvmtiEnvIterator it; 2028 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2029 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 2030 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2031 ("JVMTI [%s] data dump request event sent ", 2032 JvmtiTrace::safe_get_thread_name(thread))); 2033 JvmtiThreadEventTransition jet(thread); 2034 // JNIEnv is NULL here because this event is posted from VM Thread 2035 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 2036 if (callback != NULL) { 2037 (*callback)(env->jvmti_external()); 2038 } 2039 } 2040 } 2041} 2042 2043void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 2044 oop object = (oop)obj_mntr->object(); 2045 if (!ServiceUtil::visible_oop(object)) { 2046 // Ignore monitor contended enter for vm internal object. 2047 return; 2048 } 2049 JvmtiThreadState *state = thread->jvmti_thread_state(); 2050 if (state == NULL) { 2051 return; 2052 } 2053 2054 HandleMark hm(thread); 2055 Handle h(thread, object); 2056 2057 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2058 ("JVMTI [%s] montior contended enter event triggered", 2059 JvmtiTrace::safe_get_thread_name(thread))); 2060 2061 JvmtiEnvThreadStateIterator it(state); 2062 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2063 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2064 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2065 ("JVMTI [%s] monitor contended enter event sent", 2066 JvmtiTrace::safe_get_thread_name(thread))); 2067 JvmtiMonitorEventMark jem(thread, h()); 2068 JvmtiEnv *env = ets->get_env(); 2069 JvmtiThreadEventTransition jet(thread); 2070 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2071 if (callback != NULL) { 2072 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2073 } 2074 } 2075 } 2076} 2077 2078void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2079 oop object = (oop)obj_mntr->object(); 2080 if (!ServiceUtil::visible_oop(object)) { 2081 // Ignore monitor contended entered for vm internal object. 2082 return; 2083 } 2084 JvmtiThreadState *state = thread->jvmti_thread_state(); 2085 if (state == NULL) { 2086 return; 2087 } 2088 2089 HandleMark hm(thread); 2090 Handle h(thread, object); 2091 2092 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2093 ("JVMTI [%s] montior contended entered event triggered", 2094 JvmtiTrace::safe_get_thread_name(thread))); 2095 2096 JvmtiEnvThreadStateIterator it(state); 2097 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2098 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2099 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2100 ("JVMTI [%s] monitor contended enter event sent", 2101 JvmtiTrace::safe_get_thread_name(thread))); 2102 JvmtiMonitorEventMark jem(thread, h()); 2103 JvmtiEnv *env = ets->get_env(); 2104 JvmtiThreadEventTransition jet(thread); 2105 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2106 if (callback != NULL) { 2107 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2108 } 2109 } 2110 } 2111} 2112 2113void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2114 jlong timeout) { 2115 JvmtiThreadState *state = thread->jvmti_thread_state(); 2116 if (state == NULL) { 2117 return; 2118 } 2119 2120 HandleMark hm(thread); 2121 Handle h(thread, object); 2122 2123 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2124 ("JVMTI [%s] montior wait event triggered", 2125 JvmtiTrace::safe_get_thread_name(thread))); 2126 2127 JvmtiEnvThreadStateIterator it(state); 2128 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2129 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2130 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2131 ("JVMTI [%s] monitor wait event sent ", 2132 JvmtiTrace::safe_get_thread_name(thread))); 2133 JvmtiMonitorEventMark jem(thread, h()); 2134 JvmtiEnv *env = ets->get_env(); 2135 JvmtiThreadEventTransition jet(thread); 2136 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2137 if (callback != NULL) { 2138 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2139 jem.jni_object(), timeout); 2140 } 2141 } 2142 } 2143} 2144 2145void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2146 oop object = (oop)obj_mntr->object(); 2147 if (!ServiceUtil::visible_oop(object)) { 2148 // Ignore monitor waited for vm internal object. 2149 return; 2150 } 2151 JvmtiThreadState *state = thread->jvmti_thread_state(); 2152 if (state == NULL) { 2153 return; 2154 } 2155 2156 HandleMark hm(thread); 2157 Handle h(thread, object); 2158 2159 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2160 ("JVMTI [%s] montior waited event triggered", 2161 JvmtiTrace::safe_get_thread_name(thread))); 2162 2163 JvmtiEnvThreadStateIterator it(state); 2164 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2165 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2166 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2167 ("JVMTI [%s] monitor waited event sent ", 2168 JvmtiTrace::safe_get_thread_name(thread))); 2169 JvmtiMonitorEventMark jem(thread, h()); 2170 JvmtiEnv *env = ets->get_env(); 2171 JvmtiThreadEventTransition jet(thread); 2172 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2173 if (callback != NULL) { 2174 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2175 jem.jni_object(), timed_out); 2176 } 2177 } 2178 } 2179} 2180 2181 2182void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2183 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered", 2184 JvmtiTrace::safe_get_thread_name(thread))); 2185 if (object == NULL) { 2186 return; 2187 } 2188 HandleMark hm(thread); 2189 Handle h(thread, object); 2190 JvmtiEnvIterator it; 2191 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2192 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2193 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s", 2194 JvmtiTrace::safe_get_thread_name(thread), 2195 object==NULL? "NULL" : Klass::cast(java_lang_Class::as_klassOop(object))->external_name())); 2196 2197 JvmtiVMObjectAllocEventMark jem(thread, h()); 2198 JvmtiJavaThreadEventTransition jet(thread); 2199 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2200 if (callback != NULL) { 2201 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2202 jem.jni_jobject(), jem.jni_class(), jem.size()); 2203 } 2204 } 2205 } 2206} 2207 2208//////////////////////////////////////////////////////////////////////////////////////////////// 2209 2210void JvmtiExport::cleanup_thread(JavaThread* thread) { 2211 assert(JavaThread::current() == thread, "thread is not current"); 2212 2213 2214 // This has to happen after the thread state is removed, which is 2215 // why it is not in post_thread_end_event like its complement 2216 // Maybe both these functions should be rolled into the posts? 2217 JvmtiEventController::thread_ended(thread); 2218} 2219 2220void JvmtiExport::oops_do(OopClosure* f) { 2221 JvmtiCurrentBreakpoints::oops_do(f); 2222 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f); 2223} 2224 2225// Onload raw monitor transition. 2226void JvmtiExport::transition_pending_onload_raw_monitors() { 2227 JvmtiPendingMonitors::transition_raw_monitors(); 2228} 2229 2230//////////////////////////////////////////////////////////////////////////////////////////////// 2231 2232// type for the Agent_OnAttach entry point 2233extern "C" { 2234 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2235} 2236 2237#ifndef SERVICES_KERNEL 2238jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) { 2239 char ebuf[1024]; 2240 char buffer[JVM_MAXPATHLEN]; 2241 void* library; 2242 jint result = JNI_ERR; 2243 2244 // get agent name and options 2245 const char* agent = op->arg(0); 2246 const char* absParam = op->arg(1); 2247 const char* options = op->arg(2); 2248 2249 // The abs paramter should be "true" or "false" 2250 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2251 2252 2253 // If the path is absolute we attempt to load the library. Otherwise we try to 2254 // load it from the standard dll directory. 2255 2256 if (is_absolute_path) { 2257 library = hpi::dll_load(agent, ebuf, sizeof ebuf); 2258 } else { 2259 // Try to load the agent from the standard dll directory 2260 hpi::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), agent); 2261 library = hpi::dll_load(buffer, ebuf, sizeof ebuf); 2262 if (library == NULL) { 2263 // not found - try local path 2264 char ns[1] = {0}; 2265 hpi::dll_build_name(buffer, sizeof(buffer), ns, agent); 2266 library = hpi::dll_load(buffer, ebuf, sizeof ebuf); 2267 } 2268 } 2269 2270 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2271 // function 2272 if (library != NULL) { 2273 2274 // Lookup the Agent_OnAttach function 2275 OnAttachEntry_t on_attach_entry = NULL; 2276 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2277 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) { 2278 on_attach_entry = 2279 CAST_TO_FN_PTR(OnAttachEntry_t, hpi::dll_lookup(library, on_attach_symbols[symbol_index])); 2280 if (on_attach_entry != NULL) break; 2281 } 2282 2283 if (on_attach_entry == NULL) { 2284 // Agent_OnAttach missing - unload library 2285 hpi::dll_unload(library); 2286 } else { 2287 // Invoke the Agent_OnAttach function 2288 JavaThread* THREAD = JavaThread::current(); 2289 { 2290 extern struct JavaVM_ main_vm; 2291 JvmtiThreadEventMark jem(THREAD); 2292 JvmtiJavaThreadEventTransition jet(THREAD); 2293 2294 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2295 } 2296 2297 // Agent_OnAttach may have used JNI 2298 if (HAS_PENDING_EXCEPTION) { 2299 CLEAR_PENDING_EXCEPTION; 2300 } 2301 2302 // If OnAttach returns JNI_OK then we add it to the list of 2303 // agent libraries so that we can call Agent_OnUnload later. 2304 if (result == JNI_OK) { 2305 Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library); 2306 } 2307 2308 // Agent_OnAttach executed so completion status is JNI_OK 2309 st->print_cr("%d", result); 2310 result = JNI_OK; 2311 } 2312 } 2313 return result; 2314} 2315#endif // SERVICES_KERNEL 2316 2317// CMS has completed referencing processing so may need to update 2318// tag maps. 2319void JvmtiExport::cms_ref_processing_epilogue() { 2320 if (JvmtiEnv::environments_might_exist()) { 2321 JvmtiTagMap::cms_ref_processing_epilogue(); 2322 } 2323} 2324 2325 2326//////////////////////////////////////////////////////////////////////////////////////////////// 2327 2328// Setup current current thread for event collection. 2329void JvmtiEventCollector::setup_jvmti_thread_state() { 2330 // set this event collector to be the current one. 2331 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2332 // state can only be NULL if the current thread is exiting which 2333 // should not happen since we're trying to configure for event collection 2334 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2335 if (is_vm_object_alloc_event()) { 2336 _prev = state->get_vm_object_alloc_event_collector(); 2337 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2338 } else if (is_dynamic_code_event()) { 2339 _prev = state->get_dynamic_code_event_collector(); 2340 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2341 } 2342} 2343 2344// Unset current event collection in this thread and reset it with previous 2345// collector. 2346void JvmtiEventCollector::unset_jvmti_thread_state() { 2347 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2348 if (state != NULL) { 2349 // restore the previous event collector (if any) 2350 if (is_vm_object_alloc_event()) { 2351 if (state->get_vm_object_alloc_event_collector() == this) { 2352 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2353 } else { 2354 // this thread's jvmti state was created during the scope of 2355 // the event collector. 2356 } 2357 } else { 2358 if (is_dynamic_code_event()) { 2359 if (state->get_dynamic_code_event_collector() == this) { 2360 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2361 } else { 2362 // this thread's jvmti state was created during the scope of 2363 // the event collector. 2364 } 2365 } 2366 } 2367 } 2368} 2369 2370// create the dynamic code event collector 2371JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2372 if (JvmtiExport::should_post_dynamic_code_generated()) { 2373 setup_jvmti_thread_state(); 2374 } 2375} 2376 2377// iterate over any code blob descriptors collected and post a 2378// DYNAMIC_CODE_GENERATED event to the profiler. 2379JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2380 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2381 // iterate over any code blob descriptors that we collected 2382 if (_code_blobs != NULL) { 2383 for (int i=0; i<_code_blobs->length(); i++) { 2384 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2385 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2386 FreeHeap(blob); 2387 } 2388 delete _code_blobs; 2389 } 2390 unset_jvmti_thread_state(); 2391} 2392 2393// register a stub 2394void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2395 if (_code_blobs == NULL) { 2396 _code_blobs = new (ResourceObj::C_HEAP) GrowableArray<JvmtiCodeBlobDesc*>(1,true); 2397 } 2398 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2399} 2400 2401// Setup current thread to record vm allocated objects. 2402JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) { 2403 if (JvmtiExport::should_post_vm_object_alloc()) { 2404 _enable = true; 2405 setup_jvmti_thread_state(); 2406 } else { 2407 _enable = false; 2408 } 2409} 2410 2411// Post vm_object_alloc event for vm allocated objects visible to java 2412// world. 2413JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2414 if (_allocated != NULL) { 2415 set_enabled(false); 2416 for (int i = 0; i < _allocated->length(); i++) { 2417 oop obj = _allocated->at(i); 2418 if (ServiceUtil::visible_oop(obj)) { 2419 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj); 2420 } 2421 } 2422 delete _allocated; 2423 } 2424 unset_jvmti_thread_state(); 2425} 2426 2427void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) { 2428 assert(is_enabled(), "VM object alloc event collector is not enabled"); 2429 if (_allocated == NULL) { 2430 _allocated = new (ResourceObj::C_HEAP) GrowableArray<oop>(1, true); 2431 } 2432 _allocated->push(obj); 2433} 2434 2435// GC support. 2436void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) { 2437 if (_allocated != NULL) { 2438 for(int i=_allocated->length() - 1; i >= 0; i--) { 2439 if (_allocated->at(i) != NULL) { 2440 f->do_oop(_allocated->adr_at(i)); 2441 } 2442 } 2443 } 2444} 2445 2446void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { 2447 // no-op if jvmti not enabled 2448 if (!JvmtiEnv::environments_might_exist()) { 2449 return; 2450 } 2451 2452 // Runs at safepoint. So no need to acquire Threads_lock. 2453 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) { 2454 JvmtiThreadState *state = jthr->jvmti_thread_state(); 2455 if (state != NULL) { 2456 JvmtiVMObjectAllocEventCollector *collector; 2457 collector = state->get_vm_object_alloc_event_collector(); 2458 while (collector != NULL) { 2459 collector->oops_do(f); 2460 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev(); 2461 } 2462 } 2463 } 2464} 2465 2466 2467// Disable collection of VMObjectAlloc events 2468NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2469 // a no-op if VMObjectAlloc event is not enabled 2470 if (!JvmtiExport::should_post_vm_object_alloc()) { 2471 return; 2472 } 2473 Thread* thread = ThreadLocalStorage::thread(); 2474 if (thread != NULL && thread->is_Java_thread()) { 2475 JavaThread* current_thread = (JavaThread*)thread; 2476 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2477 if (state != NULL) { 2478 JvmtiVMObjectAllocEventCollector *collector; 2479 collector = state->get_vm_object_alloc_event_collector(); 2480 if (collector != NULL && collector->is_enabled()) { 2481 _collector = collector; 2482 _collector->set_enabled(false); 2483 } 2484 } 2485 } 2486} 2487 2488// Re-Enable collection of VMObjectAlloc events (if previously enabled) 2489NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2490 if (was_enabled()) { 2491 _collector->set_enabled(true); 2492 } 2493}; 2494 2495JvmtiGCMarker::JvmtiGCMarker(bool full) : _full(full), _invocation_count(0) { 2496 assert(Thread::current()->is_VM_thread(), "wrong thread"); 2497 2498 // if there aren't any JVMTI environments then nothing to do 2499 if (!JvmtiEnv::environments_might_exist()) { 2500 return; 2501 } 2502 2503 if (ForceFullGCJVMTIEpilogues) { 2504 // force 'Full GC' was done semantics for JVMTI GC epilogues 2505 _full = true; 2506 } 2507 2508 // GarbageCollectionStart event posted from VM thread - okay because 2509 // JVMTI is clear that the "world is stopped" and callback shouldn't 2510 // try to call into the VM. 2511 if (JvmtiExport::should_post_garbage_collection_start()) { 2512 JvmtiExport::post_garbage_collection_start(); 2513 } 2514 2515 // if "full" is false it probably means this is a scavenge of the young 2516 // generation. However it could turn out that a "full" GC is required 2517 // so we record the number of collections so that it can be checked in 2518 // the destructor. 2519 if (!_full) { 2520 _invocation_count = Universe::heap()->total_full_collections(); 2521 } 2522 2523 // Do clean up tasks that need to be done at a safepoint 2524 JvmtiEnvBase::check_for_periodic_clean_up(); 2525} 2526 2527JvmtiGCMarker::~JvmtiGCMarker() { 2528 // if there aren't any JVMTI environments then nothing to do 2529 if (!JvmtiEnv::environments_might_exist()) { 2530 return; 2531 } 2532 2533 // JVMTI notify gc finish 2534 if (JvmtiExport::should_post_garbage_collection_finish()) { 2535 JvmtiExport::post_garbage_collection_finish(); 2536 } 2537 2538 // we might have initially started out doing a scavenge of the young 2539 // generation but could have ended up doing a "full" GC - check the 2540 // GC count to see. 2541 if (!_full) { 2542 _full = (_invocation_count != Universe::heap()->total_full_collections()); 2543 } 2544 2545 // Full collection probably means the perm generation has been GC'ed 2546 // so we clear the breakpoint cache. 2547 if (_full) { 2548 JvmtiCurrentBreakpoints::gc_epilogue(); 2549 } 2550 2551 // Notify heap/object tagging support 2552 JvmtiTagMap::gc_epilogue(_full); 2553} 2554#endif // JVMTI_KERNEL 2555