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