1 /* 2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "code/nmethod.hpp" 28 #include "code/pcDesc.hpp" 29 #include "code/scopeDesc.hpp" 30 #include "interpreter/interpreter.hpp" 31 #include "jvmtifiles/jvmtiEnv.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "oops/objArrayKlass.hpp" 34 #include "oops/objArrayOop.hpp" 35 #include "prims/jvmtiCodeBlobEvents.hpp" 36 #include "prims/jvmtiEventController.hpp" 37 #include "prims/jvmtiEventController.inline.hpp" 38 #include "prims/jvmtiExport.hpp" 39 #include "prims/jvmtiImpl.hpp" 40 #include "prims/jvmtiManageCapabilities.hpp" 41 #include "prims/jvmtiRawMonitor.hpp" 42 #include "prims/jvmtiTagMap.hpp" 43 #include "prims/jvmtiThreadState.inline.hpp" 44 #include "runtime/arguments.hpp" 45 #include "runtime/handles.hpp" 46 #include "runtime/interfaceSupport.hpp" 47 #include "runtime/objectMonitor.hpp" 48 #include "runtime/objectMonitor.inline.hpp" 49 #include "runtime/thread.hpp" 50 #include "runtime/vframe.hpp" 51 #include "services/attachListener.hpp" 52 #include "services/serviceUtil.hpp" 53 #include "utilities/macros.hpp" 54 #if INCLUDE_ALL_GCS 55 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp" 56 #endif // INCLUDE_ALL_GCS 57 58 #ifdef JVMTI_TRACE 59 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; } 60 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; } 61 #else 62 #define EVT_TRIG_TRACE(evt,out) 63 #define EVT_TRACE(evt,out) 64 #endif 65 66 /////////////////////////////////////////////////////////////// 67 // 68 // JvmtiEventTransition 69 // 70 // TO DO -- 71 // more handle purging 72 73 // Use this for JavaThreads and state is _thread_in_vm. 74 class JvmtiJavaThreadEventTransition : StackObj { 75 private: 76 ResourceMark _rm; 77 ThreadToNativeFromVM _transition; 78 HandleMark _hm; 79 80 public: 81 JvmtiJavaThreadEventTransition(JavaThread *thread) : 82 _rm(), 83 _transition(thread), 84 _hm(thread) {}; 85 }; 86 87 // For JavaThreads which are not in _thread_in_vm state 88 // and other system threads use this. 89 class JvmtiThreadEventTransition : StackObj { 90 private: 91 ResourceMark _rm; 92 HandleMark _hm; 93 JavaThreadState _saved_state; 94 JavaThread *_jthread; 95 96 public: 97 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { 98 if (thread->is_Java_thread()) { 99 _jthread = (JavaThread *)thread; 100 _saved_state = _jthread->thread_state(); 101 if (_saved_state == _thread_in_Java) { 102 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 103 } else { 104 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 105 } 106 } else { 107 _jthread = NULL; 108 } 109 } 110 111 ~JvmtiThreadEventTransition() { 112 if (_jthread != NULL) 113 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 114 } 115 }; 116 117 118 /////////////////////////////////////////////////////////////// 119 // 120 // JvmtiEventMark 121 // 122 123 class JvmtiEventMark : public StackObj { 124 private: 125 JavaThread *_thread; 126 JNIEnv* _jni_env; 127 bool _exception_detected; 128 bool _exception_caught; 129 #if 0 130 JNIHandleBlock* _hblock; 131 #endif 132 133 public: 134 JvmtiEventMark(JavaThread *thread) : _thread(thread), 135 _jni_env(thread->jni_environment()) { 136 #if 0 137 _hblock = thread->active_handles(); 138 _hblock->clear_thoroughly(); // so we can be safe 139 #else 140 // we want to use the code above - but that needs the JNIHandle changes - later... 141 // for now, steal JNI push local frame code 142 JvmtiThreadState *state = thread->jvmti_thread_state(); 143 // we are before an event. 144 // Save current jvmti thread exception state. 145 if (state != NULL) { 146 _exception_detected = state->is_exception_detected(); 147 _exception_caught = state->is_exception_caught(); 148 } else { 149 _exception_detected = false; 150 _exception_caught = false; 151 } 152 153 JNIHandleBlock* old_handles = thread->active_handles(); 154 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 155 assert(new_handles != NULL, "should not be NULL"); 156 new_handles->set_pop_frame_link(old_handles); 157 thread->set_active_handles(new_handles); 158 #endif 159 assert(thread == JavaThread::current(), "thread must be current!"); 160 thread->frame_anchor()->make_walkable(thread); 161 }; 162 163 ~JvmtiEventMark() { 164 #if 0 165 _hblock->clear(); // for consistency with future correct behavior 166 #else 167 // we want to use the code above - but that needs the JNIHandle changes - later... 168 // for now, steal JNI pop local frame code 169 JNIHandleBlock* old_handles = _thread->active_handles(); 170 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 171 assert(new_handles != NULL, "should not be NULL"); 172 _thread->set_active_handles(new_handles); 173 // Note that we set the pop_frame_link to NULL explicitly, otherwise 174 // the release_block call will release the blocks. 175 old_handles->set_pop_frame_link(NULL); 176 JNIHandleBlock::release_block(old_handles, _thread); // may block 177 #endif 178 179 JvmtiThreadState* state = _thread->jvmti_thread_state(); 180 // we are continuing after an event. 181 if (state != NULL) { 182 // Restore the jvmti thread exception state. 183 if (_exception_detected) { 184 state->set_exception_detected(); 185 } 186 if (_exception_caught) { 187 state->set_exception_caught(); 188 } 189 } 190 } 191 192 #if 0 193 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 194 #else 195 // we want to use the code above - but that needs the JNIHandle changes - later... 196 // for now, use regular make_local 197 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 198 #endif 199 200 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); } 201 202 jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); } 203 204 JNIEnv* jni_env() { return _jni_env; } 205 }; 206 207 class JvmtiThreadEventMark : public JvmtiEventMark { 208 private: 209 jthread _jt; 210 211 public: 212 JvmtiThreadEventMark(JavaThread *thread) : 213 JvmtiEventMark(thread) { 214 _jt = (jthread)(to_jobject(thread->threadObj())); 215 }; 216 jthread jni_thread() { return _jt; } 217 }; 218 219 class JvmtiClassEventMark : public JvmtiThreadEventMark { 220 private: 221 jclass _jc; 222 223 public: 224 JvmtiClassEventMark(JavaThread *thread, Klass* klass) : 225 JvmtiThreadEventMark(thread) { 226 _jc = to_jclass(klass); 227 }; 228 jclass jni_class() { return _jc; } 229 }; 230 231 class JvmtiMethodEventMark : public JvmtiThreadEventMark { 232 private: 233 jmethodID _mid; 234 235 public: 236 JvmtiMethodEventMark(JavaThread *thread, methodHandle method) : 237 JvmtiThreadEventMark(thread), 238 _mid(to_jmethodID(method)) {}; 239 jmethodID jni_methodID() { return _mid; } 240 }; 241 242 class JvmtiLocationEventMark : public JvmtiMethodEventMark { 243 private: 244 jlocation _loc; 245 246 public: 247 JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) : 248 JvmtiMethodEventMark(thread, method), 249 _loc(location - method->code_base()) {}; 250 jlocation location() { return _loc; } 251 }; 252 253 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 254 private: 255 jobject _exc; 256 257 public: 258 JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) : 259 JvmtiLocationEventMark(thread, method, location), 260 _exc(to_jobject(exception())) {}; 261 jobject exception() { return _exc; } 262 }; 263 264 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 265 private: 266 const char *_class_name; 267 jobject _jloader; 268 jobject _protection_domain; 269 jclass _class_being_redefined; 270 271 public: 272 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 273 Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) { 274 _class_name = name != NULL? name->as_utf8() : NULL; 275 _jloader = (jobject)to_jobject(class_loader()); 276 _protection_domain = (jobject)to_jobject(prot_domain()); 277 if (class_being_redefined == NULL) { 278 _class_being_redefined = NULL; 279 } else { 280 _class_being_redefined = (jclass)to_jclass((*class_being_redefined)()); 281 } 282 }; 283 const char *class_name() { 284 return _class_name; 285 } 286 jobject jloader() { 287 return _jloader; 288 } 289 jobject protection_domain() { 290 return _protection_domain; 291 } 292 jclass class_being_redefined() { 293 return _class_being_redefined; 294 } 295 }; 296 297 ////////////////////////////////////////////////////////////////////////////// 298 299 int JvmtiExport::_field_access_count = 0; 300 int JvmtiExport::_field_modification_count = 0; 301 302 bool JvmtiExport::_can_access_local_variables = false; 303 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 304 bool JvmtiExport::_can_modify_any_class = false; 305 bool JvmtiExport::_can_walk_any_space = false; 306 307 bool JvmtiExport::_has_redefined_a_class = false; 308 bool JvmtiExport::_all_dependencies_are_recorded = false; 309 310 // 311 // field access management 312 // 313 314 // interpreter generator needs the address of the counter 315 address JvmtiExport::get_field_access_count_addr() { 316 // We don't grab a lock because we don't want to 317 // serialize field access between all threads. This means that a 318 // thread on another processor can see the wrong count value and 319 // may either miss making a needed call into post_field_access() 320 // or will make an unneeded call into post_field_access(). We pay 321 // this price to avoid slowing down the VM when we aren't watching 322 // field accesses. 323 // Other access/mutation safe by virtue of being in VM state. 324 return (address)(&_field_access_count); 325 } 326 327 // 328 // field modification management 329 // 330 331 // interpreter generator needs the address of the counter 332 address JvmtiExport::get_field_modification_count_addr() { 333 // We don't grab a lock because we don't 334 // want to serialize field modification between all threads. This 335 // means that a thread on another processor can see the wrong 336 // count value and may either miss making a needed call into 337 // post_field_modification() or will make an unneeded call into 338 // post_field_modification(). We pay this price to avoid slowing 339 // down the VM when we aren't watching field modifications. 340 // Other access/mutation safe by virtue of being in VM state. 341 return (address)(&_field_modification_count); 342 } 343 344 345 /////////////////////////////////////////////////////////////// 346 // Functions needed by java.lang.instrument for starting up javaagent. 347 /////////////////////////////////////////////////////////////// 348 349 jint 350 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 351 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 352 // has already been validated in JNI GetEnv(). 353 int major, minor, micro; 354 355 // micro version doesn't matter here (yet?) 356 decode_version_values(version, &major, &minor, µ); 357 switch (major) { 358 case 1: 359 switch (minor) { 360 case 0: // version 1.0.<micro> is recognized 361 case 1: // version 1.1.<micro> is recognized 362 case 2: // version 1.2.<micro> is recognized 363 break; 364 365 default: 366 return JNI_EVERSION; // unsupported minor version number 367 } 368 break; 369 default: 370 return JNI_EVERSION; // unsupported major version number 371 } 372 373 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 374 JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread(); 375 // transition code: native to VM 376 ThreadInVMfromNative __tiv(current_thread); 377 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 378 debug_only(VMNativeEntryWrapper __vew;) 379 380 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 381 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 382 return JNI_OK; 383 384 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 385 // not live, no thread to transition 386 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 387 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 388 return JNI_OK; 389 390 } else { 391 // Called at the wrong time 392 *penv = NULL; 393 return JNI_EDETACHED; 394 } 395 } 396 397 398 void 399 JvmtiExport::decode_version_values(jint version, int * major, int * minor, 400 int * micro) { 401 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 402 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 403 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 404 } 405 406 void JvmtiExport::enter_primordial_phase() { 407 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 408 } 409 410 void JvmtiExport::enter_start_phase() { 411 JvmtiManageCapabilities::recompute_always_capabilities(); 412 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 413 } 414 415 void JvmtiExport::enter_onload_phase() { 416 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 417 } 418 419 void JvmtiExport::enter_live_phase() { 420 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 421 } 422 423 // 424 // JVMTI events that the VM posts to the debugger and also startup agent 425 // and call the agent's premain() for java.lang.instrument. 426 // 427 428 void JvmtiExport::post_vm_start() { 429 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" )); 430 431 // can now enable some events 432 JvmtiEventController::vm_start(); 433 434 JvmtiEnvIterator it; 435 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 436 if (env->is_enabled(JVMTI_EVENT_VM_START)) { 437 EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" )); 438 439 JavaThread *thread = JavaThread::current(); 440 JvmtiThreadEventMark jem(thread); 441 JvmtiJavaThreadEventTransition jet(thread); 442 jvmtiEventVMStart callback = env->callbacks()->VMStart; 443 if (callback != NULL) { 444 (*callback)(env->jvmti_external(), jem.jni_env()); 445 } 446 } 447 } 448 } 449 450 451 void JvmtiExport::post_vm_initialized() { 452 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" )); 453 454 // can now enable events 455 JvmtiEventController::vm_init(); 456 457 JvmtiEnvIterator it; 458 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 459 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 460 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" )); 461 462 JavaThread *thread = JavaThread::current(); 463 JvmtiThreadEventMark jem(thread); 464 JvmtiJavaThreadEventTransition jet(thread); 465 jvmtiEventVMInit callback = env->callbacks()->VMInit; 466 if (callback != NULL) { 467 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 468 } 469 } 470 } 471 } 472 473 474 void JvmtiExport::post_vm_death() { 475 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" )); 476 477 JvmtiEnvIterator it; 478 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 479 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 480 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" )); 481 482 JavaThread *thread = JavaThread::current(); 483 JvmtiEventMark jem(thread); 484 JvmtiJavaThreadEventTransition jet(thread); 485 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 486 if (callback != NULL) { 487 (*callback)(env->jvmti_external(), jem.jni_env()); 488 } 489 } 490 } 491 492 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 493 JvmtiEventController::vm_death(); 494 } 495 496 char** 497 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 498 // Have to grab JVMTI thread state lock to be sure environment doesn't 499 // go away while we iterate them. No locks during VM bring-up. 500 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 501 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 502 } else { 503 MutexLocker mu(JvmtiThreadState_lock); 504 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 505 } 506 } 507 508 class JvmtiClassFileLoadHookPoster : public StackObj { 509 private: 510 Symbol* _h_name; 511 Handle _class_loader; 512 Handle _h_protection_domain; 513 unsigned char ** _data_ptr; 514 unsigned char ** _end_ptr; 515 JavaThread * _thread; 516 jint _curr_len; 517 unsigned char * _curr_data; 518 JvmtiEnv * _curr_env; 519 jint * _cached_length_ptr; 520 unsigned char ** _cached_data_ptr; 521 JvmtiThreadState * _state; 522 KlassHandle * _h_class_being_redefined; 523 JvmtiClassLoadKind _load_kind; 524 525 public: 526 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 527 Handle h_protection_domain, 528 unsigned char **data_ptr, unsigned char **end_ptr, 529 unsigned char **cached_data_ptr, 530 jint *cached_length_ptr) { 531 _h_name = h_name; 532 _class_loader = class_loader; 533 _h_protection_domain = h_protection_domain; 534 _data_ptr = data_ptr; 535 _end_ptr = end_ptr; 536 _thread = JavaThread::current(); 537 _curr_len = *end_ptr - *data_ptr; 538 _curr_data = *data_ptr; 539 _curr_env = NULL; 540 _cached_length_ptr = cached_length_ptr; 541 _cached_data_ptr = cached_data_ptr; 542 543 _state = _thread->jvmti_thread_state(); 544 if (_state != NULL) { 545 _h_class_being_redefined = _state->get_class_being_redefined(); 546 _load_kind = _state->get_class_load_kind(); 547 // Clear class_being_redefined flag here. The action 548 // from agent handler could generate a new class file load 549 // hook event and if it is not cleared the new event generated 550 // from regular class file load could have this stale redefined 551 // class handle info. 552 _state->clear_class_being_redefined(); 553 } else { 554 // redefine and retransform will always set the thread state 555 _h_class_being_redefined = (KlassHandle *) NULL; 556 _load_kind = jvmti_class_load_kind_load; 557 } 558 } 559 560 void post() { 561 // EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, 562 // ("JVMTI [%s] class file load hook event triggered", 563 // JvmtiTrace::safe_get_thread_name(_thread))); 564 post_all_envs(); 565 copy_modified_data(); 566 } 567 568 private: 569 void post_all_envs() { 570 if (_load_kind != jvmti_class_load_kind_retransform) { 571 // for class load and redefine, 572 // call the non-retransformable agents 573 JvmtiEnvIterator it; 574 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 575 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 576 // non-retransformable agents cannot retransform back, 577 // so no need to cache the original class file bytes 578 post_to_env(env, false); 579 } 580 } 581 } 582 JvmtiEnvIterator it; 583 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 584 // retransformable agents get all events 585 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 586 // retransformable agents need to cache the original class file 587 // bytes if changes are made via the ClassFileLoadHook 588 post_to_env(env, true); 589 } 590 } 591 } 592 593 void post_to_env(JvmtiEnv* env, bool caching_needed) { 594 unsigned char *new_data = NULL; 595 jint new_len = 0; 596 // EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, 597 // ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d", 598 // JvmtiTrace::safe_get_thread_name(_thread), 599 // _h_name == NULL ? "NULL" : _h_name->as_utf8(), 600 // _curr_data, _curr_len )); 601 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 602 _h_protection_domain, 603 _h_class_being_redefined); 604 JvmtiJavaThreadEventTransition jet(_thread); 605 JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)? 606 NULL : jem.jni_env(); 607 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 608 if (callback != NULL) { 609 (*callback)(env->jvmti_external(), jni_env, 610 jem.class_being_redefined(), 611 jem.jloader(), jem.class_name(), 612 jem.protection_domain(), 613 _curr_len, _curr_data, 614 &new_len, &new_data); 615 } 616 if (new_data != NULL) { 617 // this agent has modified class data. 618 if (caching_needed && *_cached_data_ptr == NULL) { 619 // data has been changed by the new retransformable agent 620 // and it hasn't already been cached, cache it 621 *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len, mtInternal); 622 if (*_cached_data_ptr == NULL) { 623 vm_exit_out_of_memory(_curr_len, OOM_MALLOC_ERROR, "unable to allocate cached copy of original class bytes"); 624 } 625 memcpy(*_cached_data_ptr, _curr_data, _curr_len); 626 *_cached_length_ptr = _curr_len; 627 } 628 629 if (_curr_data != *_data_ptr) { 630 // curr_data is previous agent modified class data. 631 // And this has been changed by the new agent so 632 // we can delete it now. 633 _curr_env->Deallocate(_curr_data); 634 } 635 636 // Class file data has changed by the current agent. 637 _curr_data = new_data; 638 _curr_len = new_len; 639 // Save the current agent env we need this to deallocate the 640 // memory allocated by this agent. 641 _curr_env = env; 642 } 643 } 644 645 void copy_modified_data() { 646 // if one of the agent has modified class file data. 647 // Copy modified class data to new resources array. 648 if (_curr_data != *_data_ptr) { 649 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 650 memcpy(*_data_ptr, _curr_data, _curr_len); 651 *_end_ptr = *_data_ptr + _curr_len; 652 _curr_env->Deallocate(_curr_data); 653 } 654 } 655 }; 656 657 bool JvmtiExport::_should_post_class_file_load_hook = false; 658 659 // this entry is for class file load hook on class load, redefine and retransform 660 void JvmtiExport::post_class_file_load_hook(Symbol* h_name, 661 Handle class_loader, 662 Handle h_protection_domain, 663 unsigned char **data_ptr, 664 unsigned char **end_ptr, 665 unsigned char **cached_data_ptr, 666 jint *cached_length_ptr) { 667 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 668 h_protection_domain, 669 data_ptr, end_ptr, 670 cached_data_ptr, 671 cached_length_ptr); 672 poster.post(); 673 } 674 675 void JvmtiExport::report_unsupported(bool on) { 676 // If any JVMTI service is turned on, we need to exit before native code 677 // tries to access nonexistant services. 678 if (on) { 679 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 680 } 681 } 682 683 684 static inline Klass* oop_to_klass(oop obj) { 685 Klass* k = obj->klass(); 686 687 // if the object is a java.lang.Class then return the java mirror 688 if (k == SystemDictionary::Class_klass()) { 689 if (!java_lang_Class::is_primitive(obj)) { 690 k = java_lang_Class::as_Klass(obj); 691 assert(k != NULL, "class for non-primitive mirror must exist"); 692 } 693 } 694 return k; 695 } 696 697 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark { 698 private: 699 jobject _jobj; 700 jlong _size; 701 public: 702 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) { 703 _jobj = (jobject)to_jobject(obj); 704 _size = obj->size() * wordSize; 705 }; 706 jobject jni_jobject() { return _jobj; } 707 jlong size() { return _size; } 708 }; 709 710 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 711 private: 712 jint _code_size; 713 const void *_code_data; 714 jint _map_length; 715 jvmtiAddrLocationMap *_map; 716 const void *_compile_info; 717 public: 718 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 719 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 720 _code_data = nm->insts_begin(); 721 _code_size = nm->insts_size(); 722 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 723 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 724 } 725 ~JvmtiCompiledMethodLoadEventMark() { 726 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal); 727 } 728 729 jint code_size() { return _code_size; } 730 const void *code_data() { return _code_data; } 731 jint map_length() { return _map_length; } 732 const jvmtiAddrLocationMap* map() { return _map; } 733 const void *compile_info() { return _compile_info; } 734 }; 735 736 737 738 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 739 private: 740 jobject _jobj; 741 public: 742 JvmtiMonitorEventMark(JavaThread *thread, oop object) 743 : JvmtiThreadEventMark(thread){ 744 _jobj = to_jobject(object); 745 } 746 jobject jni_object() { return _jobj; } 747 }; 748 749 /////////////////////////////////////////////////////////////// 750 // 751 // pending CompiledMethodUnload support 752 // 753 754 void JvmtiExport::post_compiled_method_unload( 755 jmethodID method, const void *code_begin) { 756 JavaThread* thread = JavaThread::current(); 757 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 758 ("JVMTI [%s] method compile unload event triggered", 759 JvmtiTrace::safe_get_thread_name(thread))); 760 761 // post the event for each environment that has this event enabled. 762 JvmtiEnvIterator it; 763 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 764 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 765 766 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 767 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT, 768 JvmtiTrace::safe_get_thread_name(thread), method)); 769 770 ResourceMark rm(thread); 771 772 JvmtiEventMark jem(thread); 773 JvmtiJavaThreadEventTransition jet(thread); 774 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 775 if (callback != NULL) { 776 (*callback)(env->jvmti_external(), method, code_begin); 777 } 778 } 779 } 780 } 781 782 /////////////////////////////////////////////////////////////// 783 // 784 // JvmtiExport 785 // 786 787 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) { 788 HandleMark hm(thread); 789 methodHandle mh(thread, method); 790 791 JvmtiThreadState *state = thread->jvmti_thread_state(); 792 if (state == NULL) { 793 return; 794 } 795 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered", 796 JvmtiTrace::safe_get_thread_name(thread))); 797 JvmtiEnvThreadStateIterator it(state); 798 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 799 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 800 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 801 ThreadState old_os_state = thread->osthread()->get_state(); 802 thread->osthread()->set_state(BREAKPOINTED); 803 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d", 804 JvmtiTrace::safe_get_thread_name(thread), 805 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 806 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 807 location - mh()->code_base() )); 808 809 JvmtiEnv *env = ets->get_env(); 810 JvmtiLocationEventMark jem(thread, mh, location); 811 JvmtiJavaThreadEventTransition jet(thread); 812 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 813 if (callback != NULL) { 814 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 815 jem.jni_methodID(), jem.location()); 816 } 817 818 ets->set_breakpoint_posted(); 819 thread->osthread()->set_state(old_os_state); 820 } 821 } 822 } 823 824 ////////////////////////////////////////////////////////////////////////////// 825 826 bool JvmtiExport::_can_get_source_debug_extension = false; 827 bool JvmtiExport::_can_maintain_original_method_order = false; 828 bool JvmtiExport::_can_post_interpreter_events = false; 829 bool JvmtiExport::_can_post_on_exceptions = false; 830 bool JvmtiExport::_can_post_breakpoint = false; 831 bool JvmtiExport::_can_post_field_access = false; 832 bool JvmtiExport::_can_post_field_modification = false; 833 bool JvmtiExport::_can_post_method_entry = false; 834 bool JvmtiExport::_can_post_method_exit = false; 835 bool JvmtiExport::_can_pop_frame = false; 836 bool JvmtiExport::_can_force_early_return = false; 837 838 bool JvmtiExport::_should_post_single_step = false; 839 bool JvmtiExport::_should_post_field_access = false; 840 bool JvmtiExport::_should_post_field_modification = false; 841 bool JvmtiExport::_should_post_class_load = false; 842 bool JvmtiExport::_should_post_class_prepare = false; 843 bool JvmtiExport::_should_post_class_unload = false; 844 bool JvmtiExport::_should_post_thread_life = false; 845 bool JvmtiExport::_should_clean_up_heap_objects = false; 846 bool JvmtiExport::_should_post_native_method_bind = false; 847 bool JvmtiExport::_should_post_dynamic_code_generated = false; 848 bool JvmtiExport::_should_post_data_dump = false; 849 bool JvmtiExport::_should_post_compiled_method_load = false; 850 bool JvmtiExport::_should_post_compiled_method_unload = false; 851 bool JvmtiExport::_should_post_monitor_contended_enter = false; 852 bool JvmtiExport::_should_post_monitor_contended_entered = false; 853 bool JvmtiExport::_should_post_monitor_wait = false; 854 bool JvmtiExport::_should_post_monitor_waited = false; 855 bool JvmtiExport::_should_post_garbage_collection_start = false; 856 bool JvmtiExport::_should_post_garbage_collection_finish = false; 857 bool JvmtiExport::_should_post_object_free = false; 858 bool JvmtiExport::_should_post_resource_exhausted = false; 859 bool JvmtiExport::_should_post_vm_object_alloc = false; 860 bool JvmtiExport::_should_post_on_exceptions = false; 861 862 //////////////////////////////////////////////////////////////////////////////////////////////// 863 864 865 // 866 // JVMTI single step management 867 // 868 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) { 869 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 870 871 HandleMark hm(thread); 872 methodHandle mh(thread, method); 873 874 // update information about current location and post a step event 875 JvmtiThreadState *state = thread->jvmti_thread_state(); 876 if (state == NULL) { 877 return; 878 } 879 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered", 880 JvmtiTrace::safe_get_thread_name(thread))); 881 if (!state->hide_single_stepping()) { 882 if (state->is_pending_step_for_popframe()) { 883 state->process_pending_step_for_popframe(); 884 } 885 if (state->is_pending_step_for_earlyret()) { 886 state->process_pending_step_for_earlyret(); 887 } 888 JvmtiExport::post_single_step(thread, mh(), location); 889 } 890 } 891 892 893 void JvmtiExport::expose_single_stepping(JavaThread *thread) { 894 JvmtiThreadState *state = thread->jvmti_thread_state(); 895 if (state != NULL) { 896 state->clear_hide_single_stepping(); 897 } 898 } 899 900 901 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 902 JvmtiThreadState *state = thread->jvmti_thread_state(); 903 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 904 state->set_hide_single_stepping(); 905 return true; 906 } else { 907 return false; 908 } 909 } 910 911 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) { 912 HandleMark hm(thread); 913 KlassHandle kh(thread, klass); 914 915 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered", 916 JvmtiTrace::safe_get_thread_name(thread))); 917 JvmtiThreadState* state = thread->jvmti_thread_state(); 918 if (state == NULL) { 919 return; 920 } 921 JvmtiEnvThreadStateIterator it(state); 922 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 923 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 924 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s", 925 JvmtiTrace::safe_get_thread_name(thread), 926 kh()==NULL? "NULL" : kh()->external_name() )); 927 928 JvmtiEnv *env = ets->get_env(); 929 JvmtiClassEventMark jem(thread, kh()); 930 JvmtiJavaThreadEventTransition jet(thread); 931 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 932 if (callback != NULL) { 933 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 934 } 935 } 936 } 937 } 938 939 940 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) { 941 HandleMark hm(thread); 942 KlassHandle kh(thread, klass); 943 944 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered", 945 JvmtiTrace::safe_get_thread_name(thread))); 946 JvmtiThreadState* state = thread->jvmti_thread_state(); 947 if (state == NULL) { 948 return; 949 } 950 JvmtiEnvThreadStateIterator it(state); 951 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 952 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 953 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s", 954 JvmtiTrace::safe_get_thread_name(thread), 955 kh()==NULL? "NULL" : kh()->external_name() )); 956 957 JvmtiEnv *env = ets->get_env(); 958 JvmtiClassEventMark jem(thread, kh()); 959 JvmtiJavaThreadEventTransition jet(thread); 960 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 961 if (callback != NULL) { 962 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 963 } 964 } 965 } 966 } 967 968 void JvmtiExport::post_class_unload(Klass* klass) { 969 Thread *thread = Thread::current(); 970 HandleMark hm(thread); 971 KlassHandle kh(thread, klass); 972 973 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" )); 974 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 975 assert(thread->is_VM_thread(), "wrong thread"); 976 977 // get JavaThread for whom we are proxy 978 JavaThread *real_thread = 979 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread(); 980 981 JvmtiEnvIterator it; 982 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 983 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 984 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s", 985 kh()==NULL? "NULL" : kh()->external_name() )); 986 987 // do everything manually, since this is a proxy - needs special care 988 JNIEnv* jni_env = real_thread->jni_environment(); 989 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); 990 jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror()); 991 992 // Before we call the JVMTI agent, we have to set the state in the 993 // thread for which we are proxying. 994 JavaThreadState prev_state = real_thread->thread_state(); 995 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint"); 996 real_thread->set_thread_state(_thread_in_native); 997 998 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 999 if (callback != NULL) { 1000 (*callback)(env->jvmti_external(), jni_env, jt, jk); 1001 } 1002 1003 assert(real_thread->thread_state() == _thread_in_native, 1004 "JavaThread should be in native"); 1005 real_thread->set_thread_state(prev_state); 1006 1007 JNIHandles::destroy_local(jk); 1008 JNIHandles::destroy_local(jt); 1009 } 1010 } 1011 } 1012 } 1013 1014 1015 void JvmtiExport::post_thread_start(JavaThread *thread) { 1016 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1017 1018 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered", 1019 JvmtiTrace::safe_get_thread_name(thread))); 1020 1021 // do JVMTI thread initialization (if needed) 1022 JvmtiEventController::thread_started(thread); 1023 1024 // Do not post thread start event for hidden java thread. 1025 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1026 !thread->is_hidden_from_external_view()) { 1027 JvmtiEnvIterator it; 1028 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1029 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1030 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent", 1031 JvmtiTrace::safe_get_thread_name(thread) )); 1032 1033 JvmtiThreadEventMark jem(thread); 1034 JvmtiJavaThreadEventTransition jet(thread); 1035 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1036 if (callback != NULL) { 1037 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1038 } 1039 } 1040 } 1041 } 1042 } 1043 1044 1045 void JvmtiExport::post_thread_end(JavaThread *thread) { 1046 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered", 1047 JvmtiTrace::safe_get_thread_name(thread))); 1048 1049 JvmtiThreadState *state = thread->jvmti_thread_state(); 1050 if (state == NULL) { 1051 return; 1052 } 1053 1054 // Do not post thread end event for hidden java thread. 1055 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1056 !thread->is_hidden_from_external_view()) { 1057 1058 JvmtiEnvThreadStateIterator it(state); 1059 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1060 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1061 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent", 1062 JvmtiTrace::safe_get_thread_name(thread) )); 1063 1064 JvmtiEnv *env = ets->get_env(); 1065 JvmtiThreadEventMark jem(thread); 1066 JvmtiJavaThreadEventTransition jet(thread); 1067 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1068 if (callback != NULL) { 1069 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1070 } 1071 } 1072 } 1073 } 1074 } 1075 1076 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1077 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1078 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1079 1080 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" )); 1081 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent")); 1082 1083 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1084 if (callback != NULL) { 1085 (*callback)(env->jvmti_external(), tag); 1086 } 1087 } 1088 1089 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1090 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" )); 1091 1092 JvmtiEnvIterator it; 1093 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1094 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1095 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" )); 1096 1097 JavaThread *thread = JavaThread::current(); 1098 JvmtiThreadEventMark jem(thread); 1099 JvmtiJavaThreadEventTransition jet(thread); 1100 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1101 if (callback != NULL) { 1102 (*callback)(env->jvmti_external(), jem.jni_env(), 1103 resource_exhausted_flags, NULL, description); 1104 } 1105 } 1106 } 1107 } 1108 1109 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) { 1110 HandleMark hm(thread); 1111 methodHandle mh(thread, method); 1112 1113 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s", 1114 JvmtiTrace::safe_get_thread_name(thread), 1115 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1116 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1117 1118 JvmtiThreadState* state = thread->jvmti_thread_state(); 1119 if (state == NULL || !state->is_interp_only_mode()) { 1120 // for any thread that actually wants method entry, interp_only_mode is set 1121 return; 1122 } 1123 1124 state->incr_cur_stack_depth(); 1125 1126 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1127 JvmtiEnvThreadStateIterator it(state); 1128 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1129 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1130 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s", 1131 JvmtiTrace::safe_get_thread_name(thread), 1132 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1133 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1134 1135 JvmtiEnv *env = ets->get_env(); 1136 JvmtiMethodEventMark jem(thread, mh); 1137 JvmtiJavaThreadEventTransition jet(thread); 1138 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1139 if (callback != NULL) { 1140 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1141 } 1142 } 1143 } 1144 } 1145 } 1146 1147 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) { 1148 HandleMark hm(thread); 1149 methodHandle mh(thread, method); 1150 1151 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s", 1152 JvmtiTrace::safe_get_thread_name(thread), 1153 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1154 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1155 1156 JvmtiThreadState *state = thread->jvmti_thread_state(); 1157 if (state == NULL || !state->is_interp_only_mode()) { 1158 // for any thread that actually wants method exit, interp_only_mode is set 1159 return; 1160 } 1161 1162 // return a flag when a method terminates by throwing an exception 1163 // i.e. if an exception is thrown and it's not caught by the current method 1164 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1165 1166 1167 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1168 Handle result; 1169 jvalue value; 1170 value.j = 0L; 1171 1172 // if the method hasn't been popped because of an exception then we populate 1173 // the return_value parameter for the callback. At this point we only have 1174 // the address of a "raw result" and we just call into the interpreter to 1175 // convert this into a jvalue. 1176 if (!exception_exit) { 1177 oop oop_result; 1178 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1179 if (type == T_OBJECT || type == T_ARRAY) { 1180 result = Handle(thread, oop_result); 1181 } 1182 } 1183 1184 JvmtiEnvThreadStateIterator it(state); 1185 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1186 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1187 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s", 1188 JvmtiTrace::safe_get_thread_name(thread), 1189 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1190 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1191 1192 JvmtiEnv *env = ets->get_env(); 1193 JvmtiMethodEventMark jem(thread, mh); 1194 if (result.not_null()) { 1195 value.l = JNIHandles::make_local(thread, result()); 1196 } 1197 JvmtiJavaThreadEventTransition jet(thread); 1198 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1199 if (callback != NULL) { 1200 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1201 jem.jni_methodID(), exception_exit, value); 1202 } 1203 } 1204 } 1205 } 1206 1207 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1208 JvmtiEnvThreadStateIterator it(state); 1209 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1210 int cur_frame_number = state->cur_stack_depth(); 1211 1212 if (ets->is_frame_pop(cur_frame_number)) { 1213 // we have a NotifyFramePop entry for this frame. 1214 // now check that this env/thread wants this event 1215 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1216 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s", 1217 JvmtiTrace::safe_get_thread_name(thread), 1218 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1219 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1220 1221 // we also need to issue a frame pop event for this frame 1222 JvmtiEnv *env = ets->get_env(); 1223 JvmtiMethodEventMark jem(thread, mh); 1224 JvmtiJavaThreadEventTransition jet(thread); 1225 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1226 if (callback != NULL) { 1227 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1228 jem.jni_methodID(), exception_exit); 1229 } 1230 } 1231 // remove the frame's entry 1232 ets->clear_frame_pop(cur_frame_number); 1233 } 1234 } 1235 } 1236 1237 state->decr_cur_stack_depth(); 1238 } 1239 1240 1241 // Todo: inline this for optimization 1242 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) { 1243 HandleMark hm(thread); 1244 methodHandle mh(thread, method); 1245 1246 JvmtiThreadState *state = thread->jvmti_thread_state(); 1247 if (state == NULL) { 1248 return; 1249 } 1250 JvmtiEnvThreadStateIterator it(state); 1251 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1252 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1253 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1254 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d", 1255 JvmtiTrace::safe_get_thread_name(thread), 1256 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1257 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1258 location - mh()->code_base() )); 1259 1260 JvmtiEnv *env = ets->get_env(); 1261 JvmtiLocationEventMark jem(thread, mh, location); 1262 JvmtiJavaThreadEventTransition jet(thread); 1263 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1264 if (callback != NULL) { 1265 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1266 jem.jni_methodID(), jem.location()); 1267 } 1268 1269 ets->set_single_stepping_posted(); 1270 } 1271 } 1272 } 1273 1274 1275 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) { 1276 HandleMark hm(thread); 1277 methodHandle mh(thread, method); 1278 Handle exception_handle(thread, exception); 1279 1280 JvmtiThreadState *state = thread->jvmti_thread_state(); 1281 if (state == NULL) { 1282 return; 1283 } 1284 1285 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered", 1286 JvmtiTrace::safe_get_thread_name(thread))); 1287 if (!state->is_exception_detected()) { 1288 state->set_exception_detected(); 1289 JvmtiEnvThreadStateIterator it(state); 1290 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1291 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1292 1293 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1294 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d", 1295 JvmtiTrace::safe_get_thread_name(thread), 1296 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1297 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1298 location - mh()->code_base() )); 1299 1300 JvmtiEnv *env = ets->get_env(); 1301 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1302 1303 // It's okay to clear these exceptions here because we duplicate 1304 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1305 EXCEPTION_MARK; 1306 1307 bool should_repeat; 1308 vframeStream st(thread); 1309 assert(!st.at_end(), "cannot be at end"); 1310 Method* current_method = NULL; 1311 // A GC may occur during the Method::fast_exception_handler_bci_for() 1312 // call below if it needs to load the constraint class. Using a 1313 // methodHandle to keep the 'current_method' from being deallocated 1314 // if GC happens. 1315 methodHandle current_mh = methodHandle(thread, current_method); 1316 int current_bci = -1; 1317 do { 1318 current_method = st.method(); 1319 current_mh = methodHandle(thread, current_method); 1320 current_bci = st.bci(); 1321 do { 1322 should_repeat = false; 1323 KlassHandle eh_klass(thread, exception_handle()->klass()); 1324 current_bci = Method::fast_exception_handler_bci_for( 1325 current_mh, eh_klass, current_bci, THREAD); 1326 if (HAS_PENDING_EXCEPTION) { 1327 exception_handle = Handle(thread, PENDING_EXCEPTION); 1328 CLEAR_PENDING_EXCEPTION; 1329 should_repeat = true; 1330 } 1331 } while (should_repeat && (current_bci != -1)); 1332 st.next(); 1333 } while ((current_bci < 0) && (!st.at_end())); 1334 1335 jmethodID catch_jmethodID; 1336 if (current_bci < 0) { 1337 catch_jmethodID = 0; 1338 current_bci = 0; 1339 } else { 1340 catch_jmethodID = jem.to_jmethodID(current_mh); 1341 } 1342 1343 JvmtiJavaThreadEventTransition jet(thread); 1344 jvmtiEventException callback = env->callbacks()->Exception; 1345 if (callback != NULL) { 1346 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1347 jem.jni_methodID(), jem.location(), 1348 jem.exception(), 1349 catch_jmethodID, current_bci); 1350 } 1351 } 1352 } 1353 } 1354 1355 // frames may get popped because of this throw, be safe - invalidate cached depth 1356 state->invalidate_cur_stack_depth(); 1357 } 1358 1359 1360 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) { 1361 HandleMark hm(thread); 1362 methodHandle mh(thread, method); 1363 Handle exception_handle(thread, exception); 1364 1365 JvmtiThreadState *state = thread->jvmti_thread_state(); 1366 if (state == NULL) { 1367 return; 1368 } 1369 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1370 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s", 1371 JvmtiTrace::safe_get_thread_name(thread), 1372 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1373 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1374 location==0? "no location:" : "", 1375 location==0? 0 : location - mh()->code_base(), 1376 in_handler_frame? "in handler frame" : "not handler frame" )); 1377 1378 if (state->is_exception_detected()) { 1379 1380 state->invalidate_cur_stack_depth(); 1381 if (!in_handler_frame) { 1382 // Not in exception handler. 1383 if(state->is_interp_only_mode()) { 1384 // method exit and frame pop events are posted only in interp mode. 1385 // When these events are enabled code should be in running in interp mode. 1386 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1387 // The cached cur_stack_depth might have changed from the 1388 // operations of frame pop or method exit. We are not 100% sure 1389 // the cached cur_stack_depth is still valid depth so invalidate 1390 // it. 1391 state->invalidate_cur_stack_depth(); 1392 } 1393 } else { 1394 // In exception handler frame. Report exception catch. 1395 assert(location != NULL, "must be a known location"); 1396 // Update cur_stack_depth - the frames above the current frame 1397 // have been unwound due to this exception: 1398 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1399 state->set_exception_caught(); 1400 1401 JvmtiEnvThreadStateIterator it(state); 1402 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1403 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1404 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1405 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d", 1406 JvmtiTrace::safe_get_thread_name(thread), 1407 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1408 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1409 location - mh()->code_base() )); 1410 1411 JvmtiEnv *env = ets->get_env(); 1412 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1413 JvmtiJavaThreadEventTransition jet(thread); 1414 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1415 if (callback != NULL) { 1416 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1417 jem.jni_methodID(), jem.location(), 1418 jem.exception()); 1419 } 1420 } 1421 } 1422 } 1423 } 1424 } 1425 1426 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1427 Klass* klass, jfieldID fieldID, bool is_static) { 1428 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1429 // At least one field access watch is set so we have more work 1430 // to do. This wrapper is used by entry points that allow us 1431 // to create handles in post_field_access_by_jni(). 1432 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1433 // event posting can block so refetch oop if we were passed a jobj 1434 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1435 } 1436 return obj; 1437 } 1438 1439 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1440 Klass* klass, jfieldID fieldID, bool is_static) { 1441 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1442 // At least one field access watch is set so we have more work 1443 // to do. This wrapper is used by "quick" entry points that don't 1444 // allow us to create handles in post_field_access_by_jni(). We 1445 // override that with a ResetNoHandleMark. 1446 ResetNoHandleMark rnhm; 1447 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1448 // event posting can block so refetch oop if we were passed a jobj 1449 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1450 } 1451 return obj; 1452 } 1453 1454 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1455 Klass* klass, jfieldID fieldID, bool is_static) { 1456 // We must be called with a Java context in order to provide reasonable 1457 // values for the klazz, method, and location fields. The callers of this 1458 // function don't make the call unless there is a Java context. 1459 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1460 1461 ResourceMark rm; 1462 fieldDescriptor fd; 1463 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1464 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1465 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1466 if (!valid_fieldID) return; 1467 // field accesses are not watched so bail 1468 if (!fd.is_field_access_watched()) return; 1469 1470 HandleMark hm(thread); 1471 KlassHandle h_klass(thread, klass); 1472 Handle h_obj; 1473 if (!is_static) { 1474 // non-static field accessors have an object, but we need a handle 1475 assert(obj != NULL, "non-static needs an object"); 1476 h_obj = Handle(thread, obj); 1477 } 1478 post_field_access(thread, 1479 thread->last_frame().interpreter_frame_method(), 1480 thread->last_frame().interpreter_frame_bcp(), 1481 h_klass, h_obj, fieldID); 1482 } 1483 1484 void JvmtiExport::post_field_access(JavaThread *thread, Method* method, 1485 address location, KlassHandle field_klass, Handle object, jfieldID field) { 1486 1487 HandleMark hm(thread); 1488 methodHandle mh(thread, method); 1489 1490 JvmtiThreadState *state = thread->jvmti_thread_state(); 1491 if (state == NULL) { 1492 return; 1493 } 1494 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered", 1495 JvmtiTrace::safe_get_thread_name(thread))); 1496 JvmtiEnvThreadStateIterator it(state); 1497 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1498 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1499 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d", 1500 JvmtiTrace::safe_get_thread_name(thread), 1501 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1502 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1503 location - mh()->code_base() )); 1504 1505 JvmtiEnv *env = ets->get_env(); 1506 JvmtiLocationEventMark jem(thread, mh, location); 1507 jclass field_jclass = jem.to_jclass(field_klass()); 1508 jobject field_jobject = jem.to_jobject(object()); 1509 JvmtiJavaThreadEventTransition jet(thread); 1510 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1511 if (callback != NULL) { 1512 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1513 jem.jni_methodID(), jem.location(), 1514 field_jclass, field_jobject, field); 1515 } 1516 } 1517 } 1518 } 1519 1520 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1521 Klass* klass, jfieldID fieldID, bool is_static, 1522 char sig_type, jvalue *value) { 1523 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1524 // At least one field modification watch is set so we have more work 1525 // to do. This wrapper is used by entry points that allow us 1526 // to create handles in post_field_modification_by_jni(). 1527 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1528 // event posting can block so refetch oop if we were passed a jobj 1529 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1530 } 1531 return obj; 1532 } 1533 1534 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1535 Klass* klass, jfieldID fieldID, bool is_static, 1536 char sig_type, jvalue *value) { 1537 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1538 // At least one field modification watch is set so we have more work 1539 // to do. This wrapper is used by "quick" entry points that don't 1540 // allow us to create handles in post_field_modification_by_jni(). We 1541 // override that with a ResetNoHandleMark. 1542 ResetNoHandleMark rnhm; 1543 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1544 // event posting can block so refetch oop if we were passed a jobj 1545 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1546 } 1547 return obj; 1548 } 1549 1550 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1551 Klass* klass, jfieldID fieldID, bool is_static, 1552 char sig_type, jvalue *value) { 1553 // We must be called with a Java context in order to provide reasonable 1554 // values for the klazz, method, and location fields. The callers of this 1555 // function don't make the call unless there is a Java context. 1556 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1557 1558 ResourceMark rm; 1559 fieldDescriptor fd; 1560 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1561 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1562 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1563 if (!valid_fieldID) return; 1564 // field modifications are not watched so bail 1565 if (!fd.is_field_modification_watched()) return; 1566 1567 HandleMark hm(thread); 1568 1569 Handle h_obj; 1570 if (!is_static) { 1571 // non-static field accessors have an object, but we need a handle 1572 assert(obj != NULL, "non-static needs an object"); 1573 h_obj = Handle(thread, obj); 1574 } 1575 KlassHandle h_klass(thread, klass); 1576 post_field_modification(thread, 1577 thread->last_frame().interpreter_frame_method(), 1578 thread->last_frame().interpreter_frame_bcp(), 1579 h_klass, h_obj, fieldID, sig_type, value); 1580 } 1581 1582 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method, 1583 address location, KlassHandle field_klass, Handle object, jfieldID field, 1584 char sig_type, jvalue *value) { 1585 1586 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') { 1587 // 'I' instructions are used for byte, char, short and int. 1588 // determine which it really is, and convert 1589 fieldDescriptor fd; 1590 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd); 1591 // should be found (if not, leave as is) 1592 if (found) { 1593 jint ival = value->i; 1594 // convert value from int to appropriate type 1595 switch (fd.field_type()) { 1596 case T_BOOLEAN: 1597 sig_type = 'Z'; 1598 value->i = 0; // clear it 1599 value->z = (jboolean)ival; 1600 break; 1601 case T_BYTE: 1602 sig_type = 'B'; 1603 value->i = 0; // clear it 1604 value->b = (jbyte)ival; 1605 break; 1606 case T_CHAR: 1607 sig_type = 'C'; 1608 value->i = 0; // clear it 1609 value->c = (jchar)ival; 1610 break; 1611 case T_SHORT: 1612 sig_type = 'S'; 1613 value->i = 0; // clear it 1614 value->s = (jshort)ival; 1615 break; 1616 case T_INT: 1617 // nothing to do 1618 break; 1619 default: 1620 // this is an integer instruction, should be one of above 1621 ShouldNotReachHere(); 1622 break; 1623 } 1624 } 1625 } 1626 1627 assert(sig_type != '[', "array should have sig_type == 'L'"); 1628 bool handle_created = false; 1629 1630 // convert oop to JNI handle. 1631 if (sig_type == 'L') { 1632 handle_created = true; 1633 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 1634 } 1635 1636 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 1637 1638 // Destroy the JNI handle allocated above. 1639 if (handle_created) { 1640 JNIHandles::destroy_local(value->l); 1641 } 1642 } 1643 1644 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method, 1645 address location, KlassHandle field_klass, Handle object, jfieldID field, 1646 char sig_type, jvalue *value_ptr) { 1647 1648 HandleMark hm(thread); 1649 methodHandle mh(thread, method); 1650 1651 JvmtiThreadState *state = thread->jvmti_thread_state(); 1652 if (state == NULL) { 1653 return; 1654 } 1655 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1656 ("JVMTI [%s] Trg Field Modification event triggered", 1657 JvmtiTrace::safe_get_thread_name(thread))); 1658 1659 JvmtiEnvThreadStateIterator it(state); 1660 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1661 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 1662 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1663 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d", 1664 JvmtiTrace::safe_get_thread_name(thread), 1665 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1666 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1667 location - mh()->code_base() )); 1668 1669 JvmtiEnv *env = ets->get_env(); 1670 JvmtiLocationEventMark jem(thread, mh, location); 1671 jclass field_jclass = jem.to_jclass(field_klass()); 1672 jobject field_jobject = jem.to_jobject(object()); 1673 JvmtiJavaThreadEventTransition jet(thread); 1674 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 1675 if (callback != NULL) { 1676 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1677 jem.jni_methodID(), jem.location(), 1678 field_jclass, field_jobject, field, sig_type, *value_ptr); 1679 } 1680 } 1681 } 1682 } 1683 1684 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) { 1685 JavaThread* thread = JavaThread::current(); 1686 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1687 1688 HandleMark hm(thread); 1689 methodHandle mh(thread, method); 1690 1691 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered", 1692 JvmtiTrace::safe_get_thread_name(thread))); 1693 1694 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1695 JvmtiEnvIterator it; 1696 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1697 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1698 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent", 1699 JvmtiTrace::safe_get_thread_name(thread) )); 1700 1701 JvmtiMethodEventMark jem(thread, mh); 1702 JvmtiJavaThreadEventTransition jet(thread); 1703 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env(); 1704 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 1705 if (callback != NULL) { 1706 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 1707 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 1708 } 1709 } 1710 } 1711 } 1712 } 1713 1714 // Returns a record containing inlining information for the given nmethod 1715 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 1716 jint numstackframes = 0; 1717 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 1718 record->header.kind = JVMTI_CMLR_INLINE_INFO; 1719 record->header.next = NULL; 1720 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 1721 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 1722 record->numpcs = 0; 1723 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1724 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1725 record->numpcs++; 1726 } 1727 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 1728 int scope = 0; 1729 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1730 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1731 void* pc_address = (void*)p->real_pc(nm); 1732 assert(pc_address != NULL, "pc_address must be non-null"); 1733 record->pcinfo[scope].pc = pc_address; 1734 numstackframes=0; 1735 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1736 numstackframes++; 1737 } 1738 assert(numstackframes != 0, "numstackframes must be nonzero."); 1739 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 1740 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 1741 record->pcinfo[scope].numstackframes = numstackframes; 1742 int stackframe = 0; 1743 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1744 // 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() 1745 assert(sd->method() != NULL, "sd->method() cannot be null."); 1746 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 1747 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 1748 stackframe++; 1749 } 1750 scope++; 1751 } 1752 return record; 1753 } 1754 1755 void JvmtiExport::post_compiled_method_load(nmethod *nm) { 1756 JavaThread* thread = JavaThread::current(); 1757 1758 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1759 ("JVMTI [%s] method compile load event triggered", 1760 JvmtiTrace::safe_get_thread_name(thread))); 1761 1762 JvmtiEnvIterator it; 1763 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1764 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1765 1766 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1767 ("JVMTI [%s] class compile method load event sent %s.%s ", 1768 JvmtiTrace::safe_get_thread_name(thread), 1769 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 1770 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 1771 ResourceMark rm(thread); 1772 HandleMark hm(thread); 1773 1774 // Add inlining information 1775 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 1776 // Pass inlining information through the void pointer 1777 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 1778 JvmtiJavaThreadEventTransition jet(thread); 1779 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1780 if (callback != NULL) { 1781 (*callback)(env->jvmti_external(), jem.jni_methodID(), 1782 jem.code_size(), jem.code_data(), jem.map_length(), 1783 jem.map(), jem.compile_info()); 1784 } 1785 } 1786 } 1787 } 1788 1789 1790 // post a COMPILED_METHOD_LOAD event for a given environment 1791 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, 1792 const void *code_begin, const jint map_length, 1793 const jvmtiAddrLocationMap* map) 1794 { 1795 JavaThread* thread = JavaThread::current(); 1796 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1797 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)", 1798 JvmtiTrace::safe_get_thread_name(thread))); 1799 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1800 1801 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1802 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT, 1803 JvmtiTrace::safe_get_thread_name(thread), method)); 1804 1805 JvmtiEventMark jem(thread); 1806 JvmtiJavaThreadEventTransition jet(thread); 1807 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1808 if (callback != NULL) { 1809 (*callback)(env->jvmti_external(), method, 1810 length, code_begin, map_length, 1811 map, NULL); 1812 } 1813 } 1814 } 1815 1816 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 1817 assert(name != NULL && name[0] != '\0', "sanity check"); 1818 1819 JavaThread* thread = JavaThread::current(); 1820 // In theory everyone coming thru here is in_vm but we need to be certain 1821 // because a callee will do a vm->native transition 1822 ThreadInVMfromUnknown __tiv; 1823 1824 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1825 ("JVMTI [%s] method dynamic code generated event triggered", 1826 JvmtiTrace::safe_get_thread_name(thread))); 1827 JvmtiEnvIterator it; 1828 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1829 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1830 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1831 ("JVMTI [%s] dynamic code generated event sent for %s", 1832 JvmtiTrace::safe_get_thread_name(thread), name)); 1833 JvmtiEventMark jem(thread); 1834 JvmtiJavaThreadEventTransition jet(thread); 1835 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1836 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1837 if (callback != NULL) { 1838 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1839 } 1840 } 1841 } 1842 } 1843 1844 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 1845 jvmtiPhase phase = JvmtiEnv::get_phase(); 1846 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 1847 post_dynamic_code_generated_internal(name, code_begin, code_end); 1848 } else { 1849 // It may not be safe to post the event from this thread. Defer all 1850 // postings to the service thread so that it can perform them in a safe 1851 // context and in-order. 1852 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); 1853 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 1854 name, code_begin, code_end); 1855 JvmtiDeferredEventQueue::enqueue(event); 1856 } 1857 } 1858 1859 1860 // post a DYNAMIC_CODE_GENERATED event for a given environment 1861 // used by GenerateEvents 1862 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 1863 const void *code_begin, const void *code_end) 1864 { 1865 JavaThread* thread = JavaThread::current(); 1866 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1867 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)", 1868 JvmtiTrace::safe_get_thread_name(thread))); 1869 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1870 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1871 ("JVMTI [%s] dynamic code generated event sent for %s", 1872 JvmtiTrace::safe_get_thread_name(thread), name)); 1873 JvmtiEventMark jem(thread); 1874 JvmtiJavaThreadEventTransition jet(thread); 1875 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1876 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1877 if (callback != NULL) { 1878 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1879 } 1880 } 1881 } 1882 1883 // post a DynamicCodeGenerated event while holding locks in the VM. 1884 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 1885 address code_begin, address code_end) 1886 { 1887 // register the stub with the current dynamic code event collector 1888 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 1889 // state can only be NULL if the current thread is exiting which 1890 // should not happen since we're trying to post an event 1891 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 1892 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 1893 guarantee(collector != NULL, "attempt to register stub without event collector"); 1894 collector->register_stub(name, code_begin, code_end); 1895 } 1896 1897 // Collect all the vm internally allocated objects which are visible to java world 1898 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 1899 Thread* thread = ThreadLocalStorage::thread(); 1900 if (thread != NULL && thread->is_Java_thread()) { 1901 // Can not take safepoint here. 1902 No_Safepoint_Verifier no_sfpt; 1903 // Can not take safepoint here so can not use state_for to get 1904 // jvmti thread state. 1905 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 1906 if (state != NULL ) { 1907 // state is non NULL when VMObjectAllocEventCollector is enabled. 1908 JvmtiVMObjectAllocEventCollector *collector; 1909 collector = state->get_vm_object_alloc_event_collector(); 1910 if (collector != NULL && collector->is_enabled()) { 1911 // Don't record classes as these will be notified via the ClassLoad 1912 // event. 1913 if (obj->klass() != SystemDictionary::Class_klass()) { 1914 collector->record_allocation(obj); 1915 } 1916 } 1917 } 1918 } 1919 } 1920 1921 void JvmtiExport::post_garbage_collection_finish() { 1922 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 1923 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 1924 ("JVMTI [%s] garbage collection finish event triggered", 1925 JvmtiTrace::safe_get_thread_name(thread))); 1926 JvmtiEnvIterator it; 1927 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1928 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 1929 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 1930 ("JVMTI [%s] garbage collection finish event sent ", 1931 JvmtiTrace::safe_get_thread_name(thread))); 1932 JvmtiThreadEventTransition jet(thread); 1933 // JNIEnv is NULL here because this event is posted from VM Thread 1934 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 1935 if (callback != NULL) { 1936 (*callback)(env->jvmti_external()); 1937 } 1938 } 1939 } 1940 } 1941 1942 void JvmtiExport::post_garbage_collection_start() { 1943 Thread* thread = Thread::current(); // this event is posted from vm-thread. 1944 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 1945 ("JVMTI [%s] garbage collection start event triggered", 1946 JvmtiTrace::safe_get_thread_name(thread))); 1947 JvmtiEnvIterator it; 1948 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1949 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 1950 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 1951 ("JVMTI [%s] garbage collection start event sent ", 1952 JvmtiTrace::safe_get_thread_name(thread))); 1953 JvmtiThreadEventTransition jet(thread); 1954 // JNIEnv is NULL here because this event is posted from VM Thread 1955 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 1956 if (callback != NULL) { 1957 (*callback)(env->jvmti_external()); 1958 } 1959 } 1960 } 1961 } 1962 1963 void JvmtiExport::post_data_dump() { 1964 Thread *thread = Thread::current(); 1965 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 1966 ("JVMTI [%s] data dump request event triggered", 1967 JvmtiTrace::safe_get_thread_name(thread))); 1968 JvmtiEnvIterator it; 1969 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1970 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 1971 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 1972 ("JVMTI [%s] data dump request event sent ", 1973 JvmtiTrace::safe_get_thread_name(thread))); 1974 JvmtiThreadEventTransition jet(thread); 1975 // JNIEnv is NULL here because this event is posted from VM Thread 1976 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 1977 if (callback != NULL) { 1978 (*callback)(env->jvmti_external()); 1979 } 1980 } 1981 } 1982 } 1983 1984 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 1985 oop object = (oop)obj_mntr->object(); 1986 if (!ServiceUtil::visible_oop(object)) { 1987 // Ignore monitor contended enter for vm internal object. 1988 return; 1989 } 1990 JvmtiThreadState *state = thread->jvmti_thread_state(); 1991 if (state == NULL) { 1992 return; 1993 } 1994 1995 HandleMark hm(thread); 1996 Handle h(thread, object); 1997 1998 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 1999 ("JVMTI [%s] montior contended enter event triggered", 2000 JvmtiTrace::safe_get_thread_name(thread))); 2001 2002 JvmtiEnvThreadStateIterator it(state); 2003 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2004 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2005 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2006 ("JVMTI [%s] monitor contended enter event sent", 2007 JvmtiTrace::safe_get_thread_name(thread))); 2008 JvmtiMonitorEventMark jem(thread, h()); 2009 JvmtiEnv *env = ets->get_env(); 2010 JvmtiThreadEventTransition jet(thread); 2011 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2012 if (callback != NULL) { 2013 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2014 } 2015 } 2016 } 2017 } 2018 2019 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2020 oop object = (oop)obj_mntr->object(); 2021 if (!ServiceUtil::visible_oop(object)) { 2022 // Ignore monitor contended entered for vm internal object. 2023 return; 2024 } 2025 JvmtiThreadState *state = thread->jvmti_thread_state(); 2026 if (state == NULL) { 2027 return; 2028 } 2029 2030 HandleMark hm(thread); 2031 Handle h(thread, object); 2032 2033 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2034 ("JVMTI [%s] montior contended entered event triggered", 2035 JvmtiTrace::safe_get_thread_name(thread))); 2036 2037 JvmtiEnvThreadStateIterator it(state); 2038 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2039 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2040 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2041 ("JVMTI [%s] monitor contended enter event sent", 2042 JvmtiTrace::safe_get_thread_name(thread))); 2043 JvmtiMonitorEventMark jem(thread, h()); 2044 JvmtiEnv *env = ets->get_env(); 2045 JvmtiThreadEventTransition jet(thread); 2046 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2047 if (callback != NULL) { 2048 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2049 } 2050 } 2051 } 2052 } 2053 2054 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2055 jlong timeout) { 2056 JvmtiThreadState *state = thread->jvmti_thread_state(); 2057 if (state == NULL) { 2058 return; 2059 } 2060 2061 HandleMark hm(thread); 2062 Handle h(thread, object); 2063 2064 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2065 ("JVMTI [%s] montior wait event triggered", 2066 JvmtiTrace::safe_get_thread_name(thread))); 2067 2068 JvmtiEnvThreadStateIterator it(state); 2069 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2070 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2071 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2072 ("JVMTI [%s] monitor wait event sent ", 2073 JvmtiTrace::safe_get_thread_name(thread))); 2074 JvmtiMonitorEventMark jem(thread, h()); 2075 JvmtiEnv *env = ets->get_env(); 2076 JvmtiThreadEventTransition jet(thread); 2077 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2078 if (callback != NULL) { 2079 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2080 jem.jni_object(), timeout); 2081 } 2082 } 2083 } 2084 } 2085 2086 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2087 oop object = (oop)obj_mntr->object(); 2088 if (!ServiceUtil::visible_oop(object)) { 2089 // Ignore monitor waited for vm internal object. 2090 return; 2091 } 2092 JvmtiThreadState *state = thread->jvmti_thread_state(); 2093 if (state == NULL) { 2094 return; 2095 } 2096 2097 HandleMark hm(thread); 2098 Handle h(thread, object); 2099 2100 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2101 ("JVMTI [%s] montior waited event triggered", 2102 JvmtiTrace::safe_get_thread_name(thread))); 2103 2104 JvmtiEnvThreadStateIterator it(state); 2105 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2106 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2107 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2108 ("JVMTI [%s] monitor waited event sent ", 2109 JvmtiTrace::safe_get_thread_name(thread))); 2110 JvmtiMonitorEventMark jem(thread, h()); 2111 JvmtiEnv *env = ets->get_env(); 2112 JvmtiThreadEventTransition jet(thread); 2113 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2114 if (callback != NULL) { 2115 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2116 jem.jni_object(), timed_out); 2117 } 2118 } 2119 } 2120 } 2121 2122 2123 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2124 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered", 2125 JvmtiTrace::safe_get_thread_name(thread))); 2126 if (object == NULL) { 2127 return; 2128 } 2129 HandleMark hm(thread); 2130 Handle h(thread, object); 2131 JvmtiEnvIterator it; 2132 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2133 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2134 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s", 2135 JvmtiTrace::safe_get_thread_name(thread), 2136 object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name())); 2137 2138 JvmtiVMObjectAllocEventMark jem(thread, h()); 2139 JvmtiJavaThreadEventTransition jet(thread); 2140 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2141 if (callback != NULL) { 2142 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2143 jem.jni_jobject(), jem.jni_class(), jem.size()); 2144 } 2145 } 2146 } 2147 } 2148 2149 //////////////////////////////////////////////////////////////////////////////////////////////// 2150 2151 void JvmtiExport::cleanup_thread(JavaThread* thread) { 2152 assert(JavaThread::current() == thread, "thread is not current"); 2153 MutexLocker mu(JvmtiThreadState_lock); 2154 2155 if (thread->jvmti_thread_state() != NULL) { 2156 // This has to happen after the thread state is removed, which is 2157 // why it is not in post_thread_end_event like its complement 2158 // Maybe both these functions should be rolled into the posts? 2159 JvmtiEventController::thread_ended(thread); 2160 } 2161 } 2162 2163 void JvmtiExport::oops_do(OopClosure* f) { 2164 JvmtiCurrentBreakpoints::oops_do(f); 2165 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f); 2166 } 2167 2168 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { 2169 JvmtiTagMap::weak_oops_do(is_alive, f); 2170 } 2171 2172 void JvmtiExport::gc_epilogue() { 2173 JvmtiCurrentBreakpoints::gc_epilogue(); 2174 } 2175 2176 // Onload raw monitor transition. 2177 void JvmtiExport::transition_pending_onload_raw_monitors() { 2178 JvmtiPendingMonitors::transition_raw_monitors(); 2179 } 2180 2181 //////////////////////////////////////////////////////////////////////////////////////////////// 2182 2183 // type for the Agent_OnAttach entry point 2184 extern "C" { 2185 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2186 } 2187 2188 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) { 2189 char ebuf[1024]; 2190 char buffer[JVM_MAXPATHLEN]; 2191 void* library = NULL; 2192 jint result = JNI_ERR; 2193 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2194 size_t num_symbol_entries = sizeof(on_attach_symbols) / sizeof(char*); 2195 2196 // get agent name and options 2197 const char* agent = op->arg(0); 2198 const char* absParam = op->arg(1); 2199 const char* options = op->arg(2); 2200 2201 // The abs paramter should be "true" or "false" 2202 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2203 bool is_static_lib = false; 2204 2205 // Initially marked as invalid. It will be set to valid if we can find the agent 2206 AgentLibrary *agentLib = new AgentLibrary(agent, options, is_absolute_path, NULL); 2207 2208 // Check for builtin agent. If not then if the path is absolute we attempt 2209 // to load the library. Otherwise we try to load it from the standard 2210 // dll directory. 2211 2212 if (!os::findBuiltinAgent(agentLib, on_attach_symbols, num_symbol_entries)) { 2213 if (is_absolute_path) { 2214 library = os::dll_load(agent, ebuf, sizeof ebuf); 2215 } else { 2216 // Try to load the agent from the standard dll directory 2217 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), 2218 agent)) { 2219 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2220 } 2221 if (library == NULL) { 2222 // not found - try local path 2223 char ns[1] = {0}; 2224 if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) { 2225 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2226 } 2227 } 2228 } 2229 if (library != NULL) { 2230 agentLib->set_os_lib(library); 2231 agentLib->set_valid(); 2232 } 2233 } 2234 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2235 // function 2236 if (agentLib->valid()) { 2237 // Lookup the Agent_OnAttach function 2238 OnAttachEntry_t on_attach_entry = NULL; 2239 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, 2240 os::findAgentFunction(agentLib, false, on_attach_symbols, num_symbol_entries)); 2241 if (on_attach_entry == NULL) { 2242 // Agent_OnAttach missing - unload library 2243 if (!agentLib->is_static_lib()) { 2244 os::dll_unload(library); 2245 } 2246 delete agentLib; 2247 } else { 2248 // Invoke the Agent_OnAttach function 2249 JavaThread* THREAD = JavaThread::current(); 2250 { 2251 extern struct JavaVM_ main_vm; 2252 JvmtiThreadEventMark jem(THREAD); 2253 JvmtiJavaThreadEventTransition jet(THREAD); 2254 2255 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2256 } 2257 2258 // Agent_OnAttach may have used JNI 2259 if (HAS_PENDING_EXCEPTION) { 2260 CLEAR_PENDING_EXCEPTION; 2261 } 2262 2263 // If OnAttach returns JNI_OK then we add it to the list of 2264 // agent libraries so that we can call Agent_OnUnload later. 2265 if (result == JNI_OK) { 2266 Arguments::add_loaded_agent(agentLib); 2267 } else { 2268 delete agentLib; 2269 } 2270 2271 // Agent_OnAttach executed so completion status is JNI_OK 2272 st->print_cr("%d", result); 2273 result = JNI_OK; 2274 } 2275 } 2276 return result; 2277 } 2278 2279 //////////////////////////////////////////////////////////////////////////////////////////////// 2280 2281 // Setup current current thread for event collection. 2282 void JvmtiEventCollector::setup_jvmti_thread_state() { 2283 // set this event collector to be the current one. 2284 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2285 // state can only be NULL if the current thread is exiting which 2286 // should not happen since we're trying to configure for event collection 2287 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2288 if (is_vm_object_alloc_event()) { 2289 _prev = state->get_vm_object_alloc_event_collector(); 2290 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2291 } else if (is_dynamic_code_event()) { 2292 _prev = state->get_dynamic_code_event_collector(); 2293 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2294 } 2295 } 2296 2297 // Unset current event collection in this thread and reset it with previous 2298 // collector. 2299 void JvmtiEventCollector::unset_jvmti_thread_state() { 2300 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2301 if (state != NULL) { 2302 // restore the previous event collector (if any) 2303 if (is_vm_object_alloc_event()) { 2304 if (state->get_vm_object_alloc_event_collector() == this) { 2305 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2306 } else { 2307 // this thread's jvmti state was created during the scope of 2308 // the event collector. 2309 } 2310 } else { 2311 if (is_dynamic_code_event()) { 2312 if (state->get_dynamic_code_event_collector() == this) { 2313 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2314 } else { 2315 // this thread's jvmti state was created during the scope of 2316 // the event collector. 2317 } 2318 } 2319 } 2320 } 2321 } 2322 2323 // create the dynamic code event collector 2324 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2325 if (JvmtiExport::should_post_dynamic_code_generated()) { 2326 setup_jvmti_thread_state(); 2327 } 2328 } 2329 2330 // iterate over any code blob descriptors collected and post a 2331 // DYNAMIC_CODE_GENERATED event to the profiler. 2332 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2333 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2334 // iterate over any code blob descriptors that we collected 2335 if (_code_blobs != NULL) { 2336 for (int i=0; i<_code_blobs->length(); i++) { 2337 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2338 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2339 FreeHeap(blob); 2340 } 2341 delete _code_blobs; 2342 } 2343 unset_jvmti_thread_state(); 2344 } 2345 2346 // register a stub 2347 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2348 if (_code_blobs == NULL) { 2349 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true); 2350 } 2351 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2352 } 2353 2354 // Setup current thread to record vm allocated objects. 2355 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) { 2356 if (JvmtiExport::should_post_vm_object_alloc()) { 2357 _enable = true; 2358 setup_jvmti_thread_state(); 2359 } else { 2360 _enable = false; 2361 } 2362 } 2363 2364 // Post vm_object_alloc event for vm allocated objects visible to java 2365 // world. 2366 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2367 if (_allocated != NULL) { 2368 set_enabled(false); 2369 for (int i = 0; i < _allocated->length(); i++) { 2370 oop obj = _allocated->at(i); 2371 if (ServiceUtil::visible_oop(obj)) { 2372 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj); 2373 } 2374 } 2375 delete _allocated; 2376 } 2377 unset_jvmti_thread_state(); 2378 } 2379 2380 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) { 2381 assert(is_enabled(), "VM object alloc event collector is not enabled"); 2382 if (_allocated == NULL) { 2383 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true); 2384 } 2385 _allocated->push(obj); 2386 } 2387 2388 // GC support. 2389 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) { 2390 if (_allocated != NULL) { 2391 for(int i=_allocated->length() - 1; i >= 0; i--) { 2392 if (_allocated->at(i) != NULL) { 2393 f->do_oop(_allocated->adr_at(i)); 2394 } 2395 } 2396 } 2397 } 2398 2399 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { 2400 // no-op if jvmti not enabled 2401 if (!JvmtiEnv::environments_might_exist()) { 2402 return; 2403 } 2404 2405 // Runs at safepoint. So no need to acquire Threads_lock. 2406 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) { 2407 JvmtiThreadState *state = jthr->jvmti_thread_state(); 2408 if (state != NULL) { 2409 JvmtiVMObjectAllocEventCollector *collector; 2410 collector = state->get_vm_object_alloc_event_collector(); 2411 while (collector != NULL) { 2412 collector->oops_do(f); 2413 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev(); 2414 } 2415 } 2416 } 2417 } 2418 2419 2420 // Disable collection of VMObjectAlloc events 2421 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2422 // a no-op if VMObjectAlloc event is not enabled 2423 if (!JvmtiExport::should_post_vm_object_alloc()) { 2424 return; 2425 } 2426 Thread* thread = ThreadLocalStorage::thread(); 2427 if (thread != NULL && thread->is_Java_thread()) { 2428 JavaThread* current_thread = (JavaThread*)thread; 2429 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2430 if (state != NULL) { 2431 JvmtiVMObjectAllocEventCollector *collector; 2432 collector = state->get_vm_object_alloc_event_collector(); 2433 if (collector != NULL && collector->is_enabled()) { 2434 _collector = collector; 2435 _collector->set_enabled(false); 2436 } 2437 } 2438 } 2439 } 2440 2441 // Re-Enable collection of VMObjectAlloc events (if previously enabled) 2442 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2443 if (was_enabled()) { 2444 _collector->set_enabled(true); 2445 } 2446 }; 2447 2448 JvmtiGCMarker::JvmtiGCMarker() { 2449 // if there aren't any JVMTI environments then nothing to do 2450 if (!JvmtiEnv::environments_might_exist()) { 2451 return; 2452 } 2453 2454 if (JvmtiExport::should_post_garbage_collection_start()) { 2455 JvmtiExport::post_garbage_collection_start(); 2456 } 2457 2458 if (SafepointSynchronize::is_at_safepoint()) { 2459 // Do clean up tasks that need to be done at a safepoint 2460 JvmtiEnvBase::check_for_periodic_clean_up(); 2461 } 2462 } 2463 2464 JvmtiGCMarker::~JvmtiGCMarker() { 2465 // if there aren't any JVMTI environments then nothing to do 2466 if (!JvmtiEnv::environments_might_exist()) { 2467 return; 2468 } 2469 2470 // JVMTI notify gc finish 2471 if (JvmtiExport::should_post_garbage_collection_finish()) { 2472 JvmtiExport::post_garbage_collection_finish(); 2473 } 2474 }