1 /* 2 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "code/nmethod.hpp" 28 #include "code/pcDesc.hpp" 29 #include "code/scopeDesc.hpp" 30 #include "interpreter/interpreter.hpp" 31 #include "jvmtifiles/jvmtiEnv.hpp" 32 #include "logging/log.hpp" 33 #include "logging/logStream.hpp" 34 #include "memory/allocation.inline.hpp" 35 #include "memory/resourceArea.hpp" 36 #include "oops/objArrayKlass.hpp" 37 #include "oops/objArrayOop.hpp" 38 #include "oops/oop.inline.hpp" 39 #include "prims/jvmtiCodeBlobEvents.hpp" 40 #include "prims/jvmtiEventController.hpp" 41 #include "prims/jvmtiEventController.inline.hpp" 42 #include "prims/jvmtiExport.hpp" 43 #include "prims/jvmtiImpl.hpp" 44 #include "prims/jvmtiManageCapabilities.hpp" 45 #include "prims/jvmtiRawMonitor.hpp" 46 #include "prims/jvmtiRedefineClasses.hpp" 47 #include "prims/jvmtiTagMap.hpp" 48 #include "prims/jvmtiThreadState.inline.hpp" 49 #include "runtime/arguments.hpp" 50 #include "runtime/fieldDescriptor.inline.hpp" 51 #include "runtime/handles.hpp" 52 #include "runtime/interfaceSupport.inline.hpp" 53 #include "runtime/javaCalls.hpp" 54 #include "runtime/jniHandles.inline.hpp" 55 #include "runtime/objectMonitor.hpp" 56 #include "runtime/objectMonitor.inline.hpp" 57 #include "runtime/os.inline.hpp" 58 #include "runtime/safepointVerifiers.hpp" 59 #include "runtime/thread.inline.hpp" 60 #include "runtime/threadSMR.hpp" 61 #include "runtime/vframe.inline.hpp" 62 #include "utilities/macros.hpp" 63 64 #ifdef JVMTI_TRACE 65 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 66 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 67 #else 68 #define EVT_TRIG_TRACE(evt,out) 69 #define EVT_TRACE(evt,out) 70 #endif 71 72 /////////////////////////////////////////////////////////////// 73 // 74 // JvmtiEventTransition 75 // 76 // TO DO -- 77 // more handle purging 78 79 // Use this for JavaThreads and state is _thread_in_vm. 80 class JvmtiJavaThreadEventTransition : StackObj { 81 private: 82 ResourceMark _rm; 83 ThreadToNativeFromVM _transition; 84 HandleMark _hm; 85 86 public: 87 JvmtiJavaThreadEventTransition(JavaThread *thread) : 88 _rm(), 89 _transition(thread), 90 _hm(thread) {}; 91 }; 92 93 // For JavaThreads which are not in _thread_in_vm state 94 // and other system threads use this. 95 class JvmtiThreadEventTransition : StackObj { 96 private: 97 ResourceMark _rm; 98 HandleMark _hm; 99 JavaThreadState _saved_state; 100 JavaThread *_jthread; 101 102 public: 103 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { 104 if (thread->is_Java_thread()) { 105 _jthread = (JavaThread *)thread; 106 _saved_state = _jthread->thread_state(); 107 if (_saved_state == _thread_in_Java) { 108 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 109 } else { 110 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 111 } 112 } else { 113 _jthread = NULL; 114 } 115 } 116 117 ~JvmtiThreadEventTransition() { 118 if (_jthread != NULL) 119 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 120 } 121 }; 122 123 124 /////////////////////////////////////////////////////////////// 125 // 126 // JvmtiEventMark 127 // 128 129 class JvmtiEventMark : public StackObj { 130 private: 131 JavaThread *_thread; 132 JNIEnv* _jni_env; 133 JvmtiThreadState::ExceptionState _saved_exception_state; 134 #if 0 135 JNIHandleBlock* _hblock; 136 #endif 137 138 public: 139 JvmtiEventMark(JavaThread *thread) : _thread(thread), 140 _jni_env(thread->jni_environment()), 141 _saved_exception_state(JvmtiThreadState::ES_CLEARED) { 142 #if 0 143 _hblock = thread->active_handles(); 144 _hblock->clear_thoroughly(); // so we can be safe 145 #else 146 // we want to use the code above - but that needs the JNIHandle changes - later... 147 // for now, steal JNI push local frame code 148 JvmtiThreadState *state = thread->jvmti_thread_state(); 149 // we are before an event. 150 // Save current jvmti thread exception state. 151 if (state != NULL) { 152 _saved_exception_state = state->get_exception_state(); 153 } 154 155 JNIHandleBlock* old_handles = thread->active_handles(); 156 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 157 assert(new_handles != NULL, "should not be NULL"); 158 new_handles->set_pop_frame_link(old_handles); 159 thread->set_active_handles(new_handles); 160 #endif 161 assert(thread == JavaThread::current(), "thread must be current!"); 162 thread->frame_anchor()->make_walkable(thread); 163 }; 164 165 ~JvmtiEventMark() { 166 #if 0 167 _hblock->clear(); // for consistency with future correct behavior 168 #else 169 // we want to use the code above - but that needs the JNIHandle changes - later... 170 // for now, steal JNI pop local frame code 171 JNIHandleBlock* old_handles = _thread->active_handles(); 172 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 173 assert(new_handles != NULL, "should not be NULL"); 174 _thread->set_active_handles(new_handles); 175 // Note that we set the pop_frame_link to NULL explicitly, otherwise 176 // the release_block call will release the blocks. 177 old_handles->set_pop_frame_link(NULL); 178 JNIHandleBlock::release_block(old_handles, _thread); // may block 179 #endif 180 181 JvmtiThreadState* state = _thread->jvmti_thread_state(); 182 // we are continuing after an event. 183 if (state != NULL) { 184 // Restore the jvmti thread exception state. 185 state->restore_exception_state(_saved_exception_state); 186 } 187 } 188 189 #if 0 190 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 191 #else 192 // we want to use the code above - but that needs the JNIHandle changes - later... 193 // for now, use regular make_local 194 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 195 #endif 196 197 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); } 198 199 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); } 200 201 JNIEnv* jni_env() { return _jni_env; } 202 }; 203 204 class JvmtiThreadEventMark : public JvmtiEventMark { 205 private: 206 jthread _jt; 207 208 public: 209 JvmtiThreadEventMark(JavaThread *thread) : 210 JvmtiEventMark(thread) { 211 _jt = (jthread)(to_jobject(thread->threadObj())); 212 }; 213 jthread jni_thread() { return _jt; } 214 }; 215 216 class JvmtiClassEventMark : public JvmtiThreadEventMark { 217 private: 218 jclass _jc; 219 220 public: 221 JvmtiClassEventMark(JavaThread *thread, Klass* klass) : 222 JvmtiThreadEventMark(thread) { 223 _jc = to_jclass(klass); 224 }; 225 jclass jni_class() { return _jc; } 226 }; 227 228 class JvmtiMethodEventMark : public JvmtiThreadEventMark { 229 private: 230 jmethodID _mid; 231 232 public: 233 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) : 234 JvmtiThreadEventMark(thread), 235 _mid(to_jmethodID(method)) {}; 236 jmethodID jni_methodID() { return _mid; } 237 }; 238 239 class JvmtiLocationEventMark : public JvmtiMethodEventMark { 240 private: 241 jlocation _loc; 242 243 public: 244 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) : 245 JvmtiMethodEventMark(thread, method), 246 _loc(location - method->code_base()) {}; 247 jlocation location() { return _loc; } 248 }; 249 250 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 251 private: 252 jobject _exc; 253 254 public: 255 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) : 256 JvmtiLocationEventMark(thread, method, location), 257 _exc(to_jobject(exception())) {}; 258 jobject exception() { return _exc; } 259 }; 260 261 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 262 private: 263 const char *_class_name; 264 jobject _jloader; 265 jobject _protection_domain; 266 jclass _class_being_redefined; 267 268 public: 269 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 270 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) { 271 _class_name = name != NULL? name->as_utf8() : NULL; 272 _jloader = (jobject)to_jobject(class_loader()); 273 _protection_domain = (jobject)to_jobject(prot_domain()); 274 if (class_being_redefined == NULL) { 275 _class_being_redefined = NULL; 276 } else { 277 _class_being_redefined = (jclass)to_jclass(class_being_redefined); 278 } 279 }; 280 const char *class_name() { 281 return _class_name; 282 } 283 jobject jloader() { 284 return _jloader; 285 } 286 jobject protection_domain() { 287 return _protection_domain; 288 } 289 jclass class_being_redefined() { 290 return _class_being_redefined; 291 } 292 }; 293 294 ////////////////////////////////////////////////////////////////////////////// 295 296 int JvmtiExport::_field_access_count = 0; 297 int JvmtiExport::_field_modification_count = 0; 298 299 bool JvmtiExport::_can_access_local_variables = false; 300 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 301 bool JvmtiExport::_can_modify_any_class = false; 302 bool JvmtiExport::_can_walk_any_space = false; 303 304 bool JvmtiExport::_has_redefined_a_class = false; 305 bool JvmtiExport::_all_dependencies_are_recorded = false; 306 307 // 308 // field access management 309 // 310 311 // interpreter generator needs the address of the counter 312 address JvmtiExport::get_field_access_count_addr() { 313 // We don't grab a lock because we don't want to 314 // serialize field access between all threads. This means that a 315 // thread on another processor can see the wrong count value and 316 // may either miss making a needed call into post_field_access() 317 // or will make an unneeded call into post_field_access(). We pay 318 // this price to avoid slowing down the VM when we aren't watching 319 // field accesses. 320 // Other access/mutation safe by virtue of being in VM state. 321 return (address)(&_field_access_count); 322 } 323 324 // 325 // field modification management 326 // 327 328 // interpreter generator needs the address of the counter 329 address JvmtiExport::get_field_modification_count_addr() { 330 // We don't grab a lock because we don't 331 // want to serialize field modification between all threads. This 332 // means that a thread on another processor can see the wrong 333 // count value and may either miss making a needed call into 334 // post_field_modification() or will make an unneeded call into 335 // post_field_modification(). We pay this price to avoid slowing 336 // down the VM when we aren't watching field modifications. 337 // Other access/mutation safe by virtue of being in VM state. 338 return (address)(&_field_modification_count); 339 } 340 341 342 /////////////////////////////////////////////////////////////// 343 // Functions needed by java.lang.instrument for starting up javaagent. 344 /////////////////////////////////////////////////////////////// 345 346 jint 347 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 348 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 349 // has already been validated in JNI GetEnv(). 350 int major, minor, micro; 351 352 // micro version doesn't matter here (yet?) 353 decode_version_values(version, &major, &minor, µ); 354 switch (major) { 355 case 1: 356 switch (minor) { 357 case 0: // version 1.0.<micro> is recognized 358 case 1: // version 1.1.<micro> is recognized 359 case 2: // version 1.2.<micro> is recognized 360 break; 361 362 default: 363 return JNI_EVERSION; // unsupported minor version number 364 } 365 break; 366 case 9: 367 switch (minor) { 368 case 0: // version 9.0.<micro> is recognized 369 break; 370 default: 371 return JNI_EVERSION; // unsupported minor version number 372 } 373 break; 374 case 11: 375 switch (minor) { 376 case 0: // version 11.0.<micro> is recognized 377 break; 378 default: 379 return JNI_EVERSION; // unsupported minor version number 380 } 381 break; 382 default: 383 return JNI_EVERSION; // unsupported major version number 384 } 385 386 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 387 JavaThread* current_thread = JavaThread::current(); 388 // transition code: native to VM 389 ThreadInVMfromNative __tiv(current_thread); 390 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 391 debug_only(VMNativeEntryWrapper __vew;) 392 393 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 394 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 395 return JNI_OK; 396 397 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 398 // not live, no thread to transition 399 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 400 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 401 return JNI_OK; 402 403 } else { 404 // Called at the wrong time 405 *penv = NULL; 406 return JNI_EDETACHED; 407 } 408 } 409 410 void 411 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) { 412 if (!Universe::is_module_initialized()) { 413 return; // extra safety 414 } 415 assert(!h_module.is_null(), "module should always be set"); 416 417 // Invoke the transformedByAgent method 418 JavaValue result(T_VOID); 419 JavaCalls::call_static(&result, 420 SystemDictionary::module_Modules_klass(), 421 vmSymbols::transformedByAgent_name(), 422 vmSymbols::transformedByAgent_signature(), 423 h_module, 424 THREAD); 425 426 if (HAS_PENDING_EXCEPTION) { 427 LogTarget(Trace, jvmti) log; 428 LogStream log_stream(log); 429 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 430 log_stream.cr(); 431 CLEAR_PENDING_EXCEPTION; 432 return; 433 } 434 } 435 436 jvmtiError 437 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) { 438 if (!Universe::is_module_initialized()) { 439 return JVMTI_ERROR_NONE; // extra safety 440 } 441 assert(!module.is_null(), "module should always be set"); 442 assert(!to_module.is_null(), "to_module should always be set"); 443 444 // Invoke the addReads method 445 JavaValue result(T_VOID); 446 JavaCalls::call_static(&result, 447 SystemDictionary::module_Modules_klass(), 448 vmSymbols::addReads_name(), 449 vmSymbols::addReads_signature(), 450 module, 451 to_module, 452 THREAD); 453 454 if (HAS_PENDING_EXCEPTION) { 455 LogTarget(Trace, jvmti) log; 456 LogStream log_stream(log); 457 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 458 log_stream.cr(); 459 CLEAR_PENDING_EXCEPTION; 460 return JVMTI_ERROR_INTERNAL; 461 } 462 return JVMTI_ERROR_NONE; 463 } 464 465 jvmtiError 466 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 467 if (!Universe::is_module_initialized()) { 468 return JVMTI_ERROR_NONE; // extra safety 469 } 470 assert(!module.is_null(), "module should always be set"); 471 assert(!to_module.is_null(), "to_module should always be set"); 472 assert(!pkg_name.is_null(), "pkg_name should always be set"); 473 474 // Invoke the addExports method 475 JavaValue result(T_VOID); 476 JavaCalls::call_static(&result, 477 SystemDictionary::module_Modules_klass(), 478 vmSymbols::addExports_name(), 479 vmSymbols::addExports_signature(), 480 module, 481 pkg_name, 482 to_module, 483 THREAD); 484 485 if (HAS_PENDING_EXCEPTION) { 486 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 487 LogTarget(Trace, jvmti) log; 488 LogStream log_stream(log); 489 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 490 log_stream.cr(); 491 CLEAR_PENDING_EXCEPTION; 492 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 493 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 494 } 495 return JVMTI_ERROR_INTERNAL; 496 } 497 return JVMTI_ERROR_NONE; 498 } 499 500 jvmtiError 501 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 502 if (!Universe::is_module_initialized()) { 503 return JVMTI_ERROR_NONE; // extra safety 504 } 505 assert(!module.is_null(), "module should always be set"); 506 assert(!to_module.is_null(), "to_module should always be set"); 507 assert(!pkg_name.is_null(), "pkg_name should always be set"); 508 509 // Invoke the addOpens method 510 JavaValue result(T_VOID); 511 JavaCalls::call_static(&result, 512 SystemDictionary::module_Modules_klass(), 513 vmSymbols::addOpens_name(), 514 vmSymbols::addExports_signature(), 515 module, 516 pkg_name, 517 to_module, 518 THREAD); 519 520 if (HAS_PENDING_EXCEPTION) { 521 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 522 LogTarget(Trace, jvmti) log; 523 LogStream log_stream(log); 524 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 525 log_stream.cr(); 526 CLEAR_PENDING_EXCEPTION; 527 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 528 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 529 } 530 return JVMTI_ERROR_INTERNAL; 531 } 532 return JVMTI_ERROR_NONE; 533 } 534 535 jvmtiError 536 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) { 537 if (!Universe::is_module_initialized()) { 538 return JVMTI_ERROR_NONE; // extra safety 539 } 540 assert(!module.is_null(), "module should always be set"); 541 assert(!service.is_null(), "service should always be set"); 542 543 // Invoke the addUses method 544 JavaValue result(T_VOID); 545 JavaCalls::call_static(&result, 546 SystemDictionary::module_Modules_klass(), 547 vmSymbols::addUses_name(), 548 vmSymbols::addUses_signature(), 549 module, 550 service, 551 THREAD); 552 553 if (HAS_PENDING_EXCEPTION) { 554 LogTarget(Trace, jvmti) log; 555 LogStream log_stream(log); 556 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 557 log_stream.cr(); 558 CLEAR_PENDING_EXCEPTION; 559 return JVMTI_ERROR_INTERNAL; 560 } 561 return JVMTI_ERROR_NONE; 562 } 563 564 jvmtiError 565 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) { 566 if (!Universe::is_module_initialized()) { 567 return JVMTI_ERROR_NONE; // extra safety 568 } 569 assert(!module.is_null(), "module should always be set"); 570 assert(!service.is_null(), "service should always be set"); 571 assert(!impl_class.is_null(), "impl_class should always be set"); 572 573 // Invoke the addProvides method 574 JavaValue result(T_VOID); 575 JavaCalls::call_static(&result, 576 SystemDictionary::module_Modules_klass(), 577 vmSymbols::addProvides_name(), 578 vmSymbols::addProvides_signature(), 579 module, 580 service, 581 impl_class, 582 THREAD); 583 584 if (HAS_PENDING_EXCEPTION) { 585 LogTarget(Trace, jvmti) log; 586 LogStream log_stream(log); 587 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 588 log_stream.cr(); 589 CLEAR_PENDING_EXCEPTION; 590 return JVMTI_ERROR_INTERNAL; 591 } 592 return JVMTI_ERROR_NONE; 593 } 594 595 void 596 JvmtiExport::decode_version_values(jint version, int * major, int * minor, 597 int * micro) { 598 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 599 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 600 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 601 } 602 603 void JvmtiExport::enter_primordial_phase() { 604 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 605 } 606 607 void JvmtiExport::enter_early_start_phase() { 608 set_early_vmstart_recorded(true); 609 } 610 611 void JvmtiExport::enter_start_phase() { 612 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 613 } 614 615 void JvmtiExport::enter_onload_phase() { 616 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 617 } 618 619 void JvmtiExport::enter_live_phase() { 620 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 621 } 622 623 // 624 // JVMTI events that the VM posts to the debugger and also startup agent 625 // and call the agent's premain() for java.lang.instrument. 626 // 627 628 void JvmtiExport::post_early_vm_start() { 629 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" )); 630 631 // can now enable some events 632 JvmtiEventController::vm_start(); 633 634 JvmtiEnvIterator it; 635 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 636 // Only early vmstart envs post early VMStart event 637 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 638 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" )); 639 JavaThread *thread = JavaThread::current(); 640 JvmtiThreadEventMark jem(thread); 641 JvmtiJavaThreadEventTransition jet(thread); 642 jvmtiEventVMStart callback = env->callbacks()->VMStart; 643 if (callback != NULL) { 644 (*callback)(env->jvmti_external(), jem.jni_env()); 645 } 646 } 647 } 648 } 649 650 void JvmtiExport::post_vm_start() { 651 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" )); 652 653 // can now enable some events 654 JvmtiEventController::vm_start(); 655 656 JvmtiEnvIterator it; 657 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 658 // Early vmstart envs do not post normal VMStart event 659 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 660 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" )); 661 662 JavaThread *thread = JavaThread::current(); 663 JvmtiThreadEventMark jem(thread); 664 JvmtiJavaThreadEventTransition jet(thread); 665 jvmtiEventVMStart callback = env->callbacks()->VMStart; 666 if (callback != NULL) { 667 (*callback)(env->jvmti_external(), jem.jni_env()); 668 } 669 } 670 } 671 } 672 673 674 void JvmtiExport::post_vm_initialized() { 675 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" )); 676 677 // can now enable events 678 JvmtiEventController::vm_init(); 679 680 JvmtiEnvIterator it; 681 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 682 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 683 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" )); 684 685 JavaThread *thread = JavaThread::current(); 686 JvmtiThreadEventMark jem(thread); 687 JvmtiJavaThreadEventTransition jet(thread); 688 jvmtiEventVMInit callback = env->callbacks()->VMInit; 689 if (callback != NULL) { 690 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 691 } 692 } 693 } 694 } 695 696 697 void JvmtiExport::post_vm_death() { 698 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" )); 699 700 JvmtiEnvIterator it; 701 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 702 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 703 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" )); 704 705 JavaThread *thread = JavaThread::current(); 706 JvmtiEventMark jem(thread); 707 JvmtiJavaThreadEventTransition jet(thread); 708 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 709 if (callback != NULL) { 710 (*callback)(env->jvmti_external(), jem.jni_env()); 711 } 712 } 713 } 714 715 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 716 JvmtiEventController::vm_death(); 717 } 718 719 char** 720 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 721 // Have to grab JVMTI thread state lock to be sure environment doesn't 722 // go away while we iterate them. No locks during VM bring-up. 723 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 724 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 725 } else { 726 MutexLocker mu(JvmtiThreadState_lock); 727 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 728 } 729 } 730 731 // Convert an external thread reference to a JavaThread found on the 732 // specified ThreadsList. The ThreadsListHandle in the caller "protects" 733 // the returned JavaThread *. 734 // 735 // If thread_oop_p is not NULL, then the caller wants to use the oop 736 // after this call so the oop is returned. On success, *jt_pp is set 737 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned. 738 // On error, returns various JVMTI_ERROR_* values. 739 // 740 jvmtiError 741 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list, 742 jthread thread, 743 JavaThread ** jt_pp, 744 oop * thread_oop_p) { 745 assert(t_list != NULL, "must have a ThreadsList"); 746 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 747 // thread_oop_p is optional so no assert() 748 749 oop thread_oop = JNIHandles::resolve_external_guard(thread); 750 if (thread_oop == NULL) { 751 // NULL jthread, GC'ed jthread or a bad JNI handle. 752 return JVMTI_ERROR_INVALID_THREAD; 753 } 754 // Looks like an oop at this point. 755 756 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 757 // The oop is not a java.lang.Thread. 758 return JVMTI_ERROR_INVALID_THREAD; 759 } 760 // Looks like a java.lang.Thread oop at this point. 761 762 if (thread_oop_p != NULL) { 763 // Return the oop to the caller; the caller may still want 764 // the oop even if this function returns an error. 765 *thread_oop_p = thread_oop; 766 } 767 768 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 769 if (java_thread == NULL) { 770 // The java.lang.Thread does not contain a JavaThread * so it has 771 // not yet run or it has died. 772 return JVMTI_ERROR_THREAD_NOT_ALIVE; 773 } 774 // Looks like a live JavaThread at this point. 775 776 // We do not check the EnableThreadSMRExtraValidityChecks option 777 // for this includes() call because JVM/TI's spec is tighter. 778 if (!t_list->includes(java_thread)) { 779 // Not on the JavaThreads list so it is not alive. 780 return JVMTI_ERROR_THREAD_NOT_ALIVE; 781 } 782 783 // Return a live JavaThread that is "protected" by the 784 // ThreadsListHandle in the caller. 785 *jt_pp = java_thread; 786 787 return JVMTI_ERROR_NONE; 788 } 789 790 // Convert an oop to a JavaThread found on the specified ThreadsList. 791 // The ThreadsListHandle in the caller "protects" the returned 792 // JavaThread *. 793 // 794 // On success, *jt_pp is set to the converted JavaThread * and 795 // JVMTI_ERROR_NONE is returned. On error, returns various 796 // JVMTI_ERROR_* values. 797 // 798 jvmtiError 799 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop, 800 JavaThread ** jt_pp) { 801 assert(t_list != NULL, "must have a ThreadsList"); 802 assert(thread_oop != NULL, "must have an oop"); 803 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 804 805 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 806 // The oop is not a java.lang.Thread. 807 return JVMTI_ERROR_INVALID_THREAD; 808 } 809 // Looks like a java.lang.Thread oop at this point. 810 811 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 812 if (java_thread == NULL) { 813 // The java.lang.Thread does not contain a JavaThread * so it has 814 // not yet run or it has died. 815 return JVMTI_ERROR_THREAD_NOT_ALIVE; 816 } 817 // Looks like a live JavaThread at this point. 818 819 // We do not check the EnableThreadSMRExtraValidityChecks option 820 // for this includes() call because JVM/TI's spec is tighter. 821 if (!t_list->includes(java_thread)) { 822 // Not on the JavaThreads list so it is not alive. 823 return JVMTI_ERROR_THREAD_NOT_ALIVE; 824 } 825 826 // Return a live JavaThread that is "protected" by the 827 // ThreadsListHandle in the caller. 828 *jt_pp = java_thread; 829 830 return JVMTI_ERROR_NONE; 831 } 832 833 class JvmtiClassFileLoadHookPoster : public StackObj { 834 private: 835 Symbol* _h_name; 836 Handle _class_loader; 837 Handle _h_protection_domain; 838 unsigned char ** _data_ptr; 839 unsigned char ** _end_ptr; 840 JavaThread * _thread; 841 jint _curr_len; 842 unsigned char * _curr_data; 843 JvmtiEnv * _curr_env; 844 JvmtiCachedClassFileData ** _cached_class_file_ptr; 845 JvmtiThreadState * _state; 846 Klass* _class_being_redefined; 847 JvmtiClassLoadKind _load_kind; 848 bool _has_been_modified; 849 850 public: 851 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 852 Handle h_protection_domain, 853 unsigned char **data_ptr, unsigned char **end_ptr, 854 JvmtiCachedClassFileData **cache_ptr) { 855 _h_name = h_name; 856 _class_loader = class_loader; 857 _h_protection_domain = h_protection_domain; 858 _data_ptr = data_ptr; 859 _end_ptr = end_ptr; 860 _thread = JavaThread::current(); 861 _curr_len = *end_ptr - *data_ptr; 862 _curr_data = *data_ptr; 863 _curr_env = NULL; 864 _cached_class_file_ptr = cache_ptr; 865 _has_been_modified = false; 866 867 _state = _thread->jvmti_thread_state(); 868 if (_state != NULL) { 869 _class_being_redefined = _state->get_class_being_redefined(); 870 _load_kind = _state->get_class_load_kind(); 871 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined; 872 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) { 873 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module(); 874 assert(module_entry != NULL, "module_entry should always be set"); 875 if (module_entry->is_named() && 876 module_entry->module() != NULL && 877 !module_entry->has_default_read_edges()) { 878 if (!module_entry->set_has_default_read_edges()) { 879 // We won a potential race. 880 // Add read edges to the unnamed modules of the bootstrap and app class loaders 881 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module 882 JvmtiExport::add_default_read_edges(class_module, _thread); 883 } 884 } 885 } 886 // Clear class_being_redefined flag here. The action 887 // from agent handler could generate a new class file load 888 // hook event and if it is not cleared the new event generated 889 // from regular class file load could have this stale redefined 890 // class handle info. 891 _state->clear_class_being_redefined(); 892 } else { 893 // redefine and retransform will always set the thread state 894 _class_being_redefined = NULL; 895 _load_kind = jvmti_class_load_kind_load; 896 } 897 } 898 899 void post() { 900 post_all_envs(); 901 copy_modified_data(); 902 } 903 904 bool has_been_modified() { return _has_been_modified; } 905 906 private: 907 void post_all_envs() { 908 if (_load_kind != jvmti_class_load_kind_retransform) { 909 // for class load and redefine, 910 // call the non-retransformable agents 911 JvmtiEnvIterator it; 912 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 913 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 914 // non-retransformable agents cannot retransform back, 915 // so no need to cache the original class file bytes 916 post_to_env(env, false); 917 } 918 } 919 } 920 JvmtiEnvIterator it; 921 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 922 // retransformable agents get all events 923 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 924 // retransformable agents need to cache the original class file 925 // bytes if changes are made via the ClassFileLoadHook 926 post_to_env(env, true); 927 } 928 } 929 } 930 931 void post_to_env(JvmtiEnv* env, bool caching_needed) { 932 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) { 933 return; 934 } 935 unsigned char *new_data = NULL; 936 jint new_len = 0; 937 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 938 _h_protection_domain, 939 _class_being_redefined); 940 JvmtiJavaThreadEventTransition jet(_thread); 941 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 942 if (callback != NULL) { 943 (*callback)(env->jvmti_external(), jem.jni_env(), 944 jem.class_being_redefined(), 945 jem.jloader(), jem.class_name(), 946 jem.protection_domain(), 947 _curr_len, _curr_data, 948 &new_len, &new_data); 949 } 950 if (new_data != NULL) { 951 // this agent has modified class data. 952 _has_been_modified = true; 953 if (caching_needed && *_cached_class_file_ptr == NULL) { 954 // data has been changed by the new retransformable agent 955 // and it hasn't already been cached, cache it 956 JvmtiCachedClassFileData *p; 957 p = (JvmtiCachedClassFileData *)os::malloc( 958 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal); 959 if (p == NULL) { 960 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len, 961 OOM_MALLOC_ERROR, 962 "unable to allocate cached copy of original class bytes"); 963 } 964 p->length = _curr_len; 965 memcpy(p->data, _curr_data, _curr_len); 966 *_cached_class_file_ptr = p; 967 } 968 969 if (_curr_data != *_data_ptr) { 970 // curr_data is previous agent modified class data. 971 // And this has been changed by the new agent so 972 // we can delete it now. 973 _curr_env->Deallocate(_curr_data); 974 } 975 976 // Class file data has changed by the current agent. 977 _curr_data = new_data; 978 _curr_len = new_len; 979 // Save the current agent env we need this to deallocate the 980 // memory allocated by this agent. 981 _curr_env = env; 982 } 983 } 984 985 void copy_modified_data() { 986 // if one of the agent has modified class file data. 987 // Copy modified class data to new resources array. 988 if (_curr_data != *_data_ptr) { 989 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 990 memcpy(*_data_ptr, _curr_data, _curr_len); 991 *_end_ptr = *_data_ptr + _curr_len; 992 _curr_env->Deallocate(_curr_data); 993 } 994 } 995 }; 996 997 bool JvmtiExport::early_class_hook_env() { 998 JvmtiEnvIterator it; 999 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1000 if (env->early_class_hook_env()) { 1001 return true; 1002 } 1003 } 1004 return false; 1005 } 1006 1007 bool JvmtiExport::_should_post_class_file_load_hook = false; 1008 1009 // this entry is for class file load hook on class load, redefine and retransform 1010 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name, 1011 Handle class_loader, 1012 Handle h_protection_domain, 1013 unsigned char **data_ptr, 1014 unsigned char **end_ptr, 1015 JvmtiCachedClassFileData **cache_ptr) { 1016 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1017 return false; 1018 } 1019 1020 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 1021 h_protection_domain, 1022 data_ptr, end_ptr, 1023 cache_ptr); 1024 poster.post(); 1025 return poster.has_been_modified(); 1026 } 1027 1028 void JvmtiExport::report_unsupported(bool on) { 1029 // If any JVMTI service is turned on, we need to exit before native code 1030 // tries to access nonexistant services. 1031 if (on) { 1032 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 1033 } 1034 } 1035 1036 1037 static inline Klass* oop_to_klass(oop obj) { 1038 Klass* k = obj->klass(); 1039 1040 // if the object is a java.lang.Class then return the java mirror 1041 if (k == SystemDictionary::Class_klass()) { 1042 if (!java_lang_Class::is_primitive(obj)) { 1043 k = java_lang_Class::as_Klass(obj); 1044 assert(k != NULL, "class for non-primitive mirror must exist"); 1045 } 1046 } 1047 return k; 1048 } 1049 1050 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark { 1051 private: 1052 jobject _jobj; 1053 jlong _size; 1054 public: 1055 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) { 1056 _jobj = (jobject)to_jobject(obj); 1057 _size = Universe::heap()->obj_size(obj) * wordSize; 1058 }; 1059 jobject jni_jobject() { return _jobj; } 1060 jlong size() { return _size; } 1061 }; 1062 1063 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 1064 private: 1065 jint _code_size; 1066 const void *_code_data; 1067 jint _map_length; 1068 jvmtiAddrLocationMap *_map; 1069 const void *_compile_info; 1070 public: 1071 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 1072 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 1073 _code_data = nm->insts_begin(); 1074 _code_size = nm->insts_size(); 1075 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 1076 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 1077 } 1078 ~JvmtiCompiledMethodLoadEventMark() { 1079 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); 1080 } 1081 1082 jint code_size() { return _code_size; } 1083 const void *code_data() { return _code_data; } 1084 jint map_length() { return _map_length; } 1085 const jvmtiAddrLocationMap* map() { return _map; } 1086 const void *compile_info() { return _compile_info; } 1087 }; 1088 1089 1090 1091 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 1092 private: 1093 jobject _jobj; 1094 public: 1095 JvmtiMonitorEventMark(JavaThread *thread, oop object) 1096 : JvmtiThreadEventMark(thread){ 1097 _jobj = to_jobject(object); 1098 } 1099 jobject jni_object() { return _jobj; } 1100 }; 1101 1102 /////////////////////////////////////////////////////////////// 1103 // 1104 // pending CompiledMethodUnload support 1105 // 1106 1107 void JvmtiExport::post_compiled_method_unload( 1108 jmethodID method, const void *code_begin) { 1109 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1110 return; 1111 } 1112 JavaThread* thread = JavaThread::current(); 1113 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1114 ("[%s] method compile unload event triggered", 1115 JvmtiTrace::safe_get_thread_name(thread))); 1116 1117 // post the event for each environment that has this event enabled. 1118 JvmtiEnvIterator it; 1119 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1120 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 1121 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1122 continue; 1123 } 1124 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1125 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT, 1126 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 1127 1128 ResourceMark rm(thread); 1129 1130 JvmtiEventMark jem(thread); 1131 JvmtiJavaThreadEventTransition jet(thread); 1132 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 1133 if (callback != NULL) { 1134 (*callback)(env->jvmti_external(), method, code_begin); 1135 } 1136 } 1137 } 1138 } 1139 1140 /////////////////////////////////////////////////////////////// 1141 // 1142 // JvmtiExport 1143 // 1144 1145 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) { 1146 HandleMark hm(thread); 1147 methodHandle mh(thread, method); 1148 1149 JvmtiThreadState *state = thread->jvmti_thread_state(); 1150 if (state == NULL) { 1151 return; 1152 } 1153 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered", 1154 JvmtiTrace::safe_get_thread_name(thread))); 1155 JvmtiEnvThreadStateIterator it(state); 1156 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1157 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 1158 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 1159 ThreadState old_os_state = thread->osthread()->get_state(); 1160 thread->osthread()->set_state(BREAKPOINTED); 1161 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT, 1162 JvmtiTrace::safe_get_thread_name(thread), 1163 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1164 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1165 location - mh()->code_base() )); 1166 1167 JvmtiEnv *env = ets->get_env(); 1168 JvmtiLocationEventMark jem(thread, mh, location); 1169 JvmtiJavaThreadEventTransition jet(thread); 1170 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 1171 if (callback != NULL) { 1172 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1173 jem.jni_methodID(), jem.location()); 1174 } 1175 1176 ets->set_breakpoint_posted(); 1177 thread->osthread()->set_state(old_os_state); 1178 } 1179 } 1180 } 1181 1182 ////////////////////////////////////////////////////////////////////////////// 1183 1184 bool JvmtiExport::_can_get_source_debug_extension = false; 1185 bool JvmtiExport::_can_maintain_original_method_order = false; 1186 bool JvmtiExport::_can_post_interpreter_events = false; 1187 bool JvmtiExport::_can_post_on_exceptions = false; 1188 bool JvmtiExport::_can_post_breakpoint = false; 1189 bool JvmtiExport::_can_post_field_access = false; 1190 bool JvmtiExport::_can_post_field_modification = false; 1191 bool JvmtiExport::_can_post_method_entry = false; 1192 bool JvmtiExport::_can_post_method_exit = false; 1193 bool JvmtiExport::_can_pop_frame = false; 1194 bool JvmtiExport::_can_force_early_return = false; 1195 1196 bool JvmtiExport::_early_vmstart_recorded = false; 1197 1198 bool JvmtiExport::_should_post_single_step = false; 1199 bool JvmtiExport::_should_post_field_access = false; 1200 bool JvmtiExport::_should_post_field_modification = false; 1201 bool JvmtiExport::_should_post_class_load = false; 1202 bool JvmtiExport::_should_post_class_prepare = false; 1203 bool JvmtiExport::_should_post_class_unload = false; 1204 bool JvmtiExport::_should_post_thread_life = false; 1205 bool JvmtiExport::_should_clean_up_heap_objects = false; 1206 bool JvmtiExport::_should_post_native_method_bind = false; 1207 bool JvmtiExport::_should_post_dynamic_code_generated = false; 1208 bool JvmtiExport::_should_post_data_dump = false; 1209 bool JvmtiExport::_should_post_compiled_method_load = false; 1210 bool JvmtiExport::_should_post_compiled_method_unload = false; 1211 bool JvmtiExport::_should_post_monitor_contended_enter = false; 1212 bool JvmtiExport::_should_post_monitor_contended_entered = false; 1213 bool JvmtiExport::_should_post_monitor_wait = false; 1214 bool JvmtiExport::_should_post_monitor_waited = false; 1215 bool JvmtiExport::_should_post_garbage_collection_start = false; 1216 bool JvmtiExport::_should_post_garbage_collection_finish = false; 1217 bool JvmtiExport::_should_post_object_free = false; 1218 bool JvmtiExport::_should_post_resource_exhausted = false; 1219 bool JvmtiExport::_should_post_vm_object_alloc = false; 1220 bool JvmtiExport::_should_post_sampled_object_alloc = false; 1221 bool JvmtiExport::_should_post_on_exceptions = false; 1222 1223 //////////////////////////////////////////////////////////////////////////////////////////////// 1224 1225 1226 // 1227 // JVMTI single step management 1228 // 1229 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) { 1230 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 1231 1232 HandleMark hm(thread); 1233 methodHandle mh(thread, method); 1234 1235 // update information about current location and post a step event 1236 JvmtiThreadState *state = thread->jvmti_thread_state(); 1237 if (state == NULL) { 1238 return; 1239 } 1240 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered", 1241 JvmtiTrace::safe_get_thread_name(thread))); 1242 if (!state->hide_single_stepping()) { 1243 if (state->is_pending_step_for_popframe()) { 1244 state->process_pending_step_for_popframe(); 1245 } 1246 if (state->is_pending_step_for_earlyret()) { 1247 state->process_pending_step_for_earlyret(); 1248 } 1249 JvmtiExport::post_single_step(thread, mh(), location); 1250 } 1251 } 1252 1253 1254 void JvmtiExport::expose_single_stepping(JavaThread *thread) { 1255 JvmtiThreadState *state = thread->jvmti_thread_state(); 1256 if (state != NULL) { 1257 state->clear_hide_single_stepping(); 1258 } 1259 } 1260 1261 1262 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 1263 JvmtiThreadState *state = thread->jvmti_thread_state(); 1264 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1265 state->set_hide_single_stepping(); 1266 return true; 1267 } else { 1268 return false; 1269 } 1270 } 1271 1272 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) { 1273 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1274 return; 1275 } 1276 HandleMark hm(thread); 1277 1278 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered", 1279 JvmtiTrace::safe_get_thread_name(thread))); 1280 JvmtiThreadState* state = thread->jvmti_thread_state(); 1281 if (state == NULL) { 1282 return; 1283 } 1284 JvmtiEnvThreadStateIterator it(state); 1285 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1286 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 1287 JvmtiEnv *env = ets->get_env(); 1288 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1289 continue; 1290 } 1291 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s", 1292 JvmtiTrace::safe_get_thread_name(thread), 1293 klass==NULL? "NULL" : klass->external_name() )); 1294 JvmtiClassEventMark jem(thread, klass); 1295 JvmtiJavaThreadEventTransition jet(thread); 1296 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 1297 if (callback != NULL) { 1298 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1299 } 1300 } 1301 } 1302 } 1303 1304 1305 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) { 1306 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1307 return; 1308 } 1309 HandleMark hm(thread); 1310 1311 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered", 1312 JvmtiTrace::safe_get_thread_name(thread))); 1313 JvmtiThreadState* state = thread->jvmti_thread_state(); 1314 if (state == NULL) { 1315 return; 1316 } 1317 JvmtiEnvThreadStateIterator it(state); 1318 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1319 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 1320 JvmtiEnv *env = ets->get_env(); 1321 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1322 continue; 1323 } 1324 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s", 1325 JvmtiTrace::safe_get_thread_name(thread), 1326 klass==NULL? "NULL" : klass->external_name() )); 1327 JvmtiClassEventMark jem(thread, klass); 1328 JvmtiJavaThreadEventTransition jet(thread); 1329 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 1330 if (callback != NULL) { 1331 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1332 } 1333 } 1334 } 1335 } 1336 1337 void JvmtiExport::post_class_unload(Klass* klass) { 1338 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1339 return; 1340 } 1341 Thread *thread = Thread::current(); 1342 HandleMark hm(thread); 1343 1344 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" )); 1345 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1346 assert(thread->is_VM_thread(), "wrong thread"); 1347 1348 // get JavaThread for whom we are proxy 1349 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread(); 1350 if (!calling_thread->is_Java_thread()) { 1351 // cannot post an event to a non-JavaThread 1352 return; 1353 } 1354 JavaThread *real_thread = (JavaThread *)calling_thread; 1355 1356 JvmtiEnvIterator it; 1357 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1358 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1359 continue; 1360 } 1361 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1362 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s", 1363 klass==NULL? "NULL" : klass->external_name() )); 1364 1365 // do everything manually, since this is a proxy - needs special care 1366 JNIEnv* jni_env = real_thread->jni_environment(); 1367 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); 1368 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror()); 1369 1370 // Before we call the JVMTI agent, we have to set the state in the 1371 // thread for which we are proxying. 1372 JavaThreadState prev_state = real_thread->thread_state(); 1373 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() || 1374 (real_thread->is_Java_thread() && prev_state == _thread_blocked), 1375 "should be ConcurrentGCThread or JavaThread at safepoint"); 1376 real_thread->set_thread_state(_thread_in_native); 1377 1378 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 1379 if (callback != NULL) { 1380 (*callback)(env->jvmti_external(), jni_env, jt, jk); 1381 } 1382 1383 assert(real_thread->thread_state() == _thread_in_native, 1384 "JavaThread should be in native"); 1385 real_thread->set_thread_state(prev_state); 1386 1387 JNIHandles::destroy_local(jk); 1388 JNIHandles::destroy_local(jt); 1389 } 1390 } 1391 } 1392 } 1393 1394 1395 void JvmtiExport::post_thread_start(JavaThread *thread) { 1396 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1397 return; 1398 } 1399 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1400 1401 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered", 1402 JvmtiTrace::safe_get_thread_name(thread))); 1403 1404 // do JVMTI thread initialization (if needed) 1405 JvmtiEventController::thread_started(thread); 1406 1407 // Do not post thread start event for hidden java thread. 1408 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1409 !thread->is_hidden_from_external_view()) { 1410 JvmtiEnvIterator it; 1411 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1412 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1413 continue; 1414 } 1415 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1416 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent", 1417 JvmtiTrace::safe_get_thread_name(thread) )); 1418 1419 JvmtiThreadEventMark jem(thread); 1420 JvmtiJavaThreadEventTransition jet(thread); 1421 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1422 if (callback != NULL) { 1423 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1424 } 1425 } 1426 } 1427 } 1428 } 1429 1430 1431 void JvmtiExport::post_thread_end(JavaThread *thread) { 1432 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1433 return; 1434 } 1435 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered", 1436 JvmtiTrace::safe_get_thread_name(thread))); 1437 1438 JvmtiThreadState *state = thread->jvmti_thread_state(); 1439 if (state == NULL) { 1440 return; 1441 } 1442 1443 // Do not post thread end event for hidden java thread. 1444 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1445 !thread->is_hidden_from_external_view()) { 1446 1447 JvmtiEnvThreadStateIterator it(state); 1448 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1449 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1450 JvmtiEnv *env = ets->get_env(); 1451 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1452 continue; 1453 } 1454 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent", 1455 JvmtiTrace::safe_get_thread_name(thread) )); 1456 1457 JvmtiThreadEventMark jem(thread); 1458 JvmtiJavaThreadEventTransition jet(thread); 1459 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1460 if (callback != NULL) { 1461 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1462 } 1463 } 1464 } 1465 } 1466 } 1467 1468 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1469 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1470 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1471 1472 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" )); 1473 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent")); 1474 1475 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1476 if (callback != NULL) { 1477 (*callback)(env->jvmti_external(), tag); 1478 } 1479 } 1480 1481 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1482 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" )); 1483 1484 JvmtiEnvIterator it; 1485 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1486 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1487 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" )); 1488 1489 JavaThread *thread = JavaThread::current(); 1490 JvmtiThreadEventMark jem(thread); 1491 JvmtiJavaThreadEventTransition jet(thread); 1492 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1493 if (callback != NULL) { 1494 (*callback)(env->jvmti_external(), jem.jni_env(), 1495 resource_exhausted_flags, NULL, description); 1496 } 1497 } 1498 } 1499 } 1500 1501 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) { 1502 HandleMark hm(thread); 1503 methodHandle mh(thread, method); 1504 1505 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s", 1506 JvmtiTrace::safe_get_thread_name(thread), 1507 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1508 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1509 1510 JvmtiThreadState* state = thread->jvmti_thread_state(); 1511 if (state == NULL || !state->is_interp_only_mode()) { 1512 // for any thread that actually wants method entry, interp_only_mode is set 1513 return; 1514 } 1515 1516 state->incr_cur_stack_depth(); 1517 1518 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1519 JvmtiEnvThreadStateIterator it(state); 1520 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1521 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1522 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s", 1523 JvmtiTrace::safe_get_thread_name(thread), 1524 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1525 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1526 1527 JvmtiEnv *env = ets->get_env(); 1528 JvmtiMethodEventMark jem(thread, mh); 1529 JvmtiJavaThreadEventTransition jet(thread); 1530 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1531 if (callback != NULL) { 1532 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1533 } 1534 } 1535 } 1536 } 1537 } 1538 1539 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) { 1540 HandleMark hm(thread); 1541 methodHandle mh(thread, method); 1542 1543 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s", 1544 JvmtiTrace::safe_get_thread_name(thread), 1545 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1546 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1547 1548 JvmtiThreadState *state = thread->jvmti_thread_state(); 1549 if (state == NULL || !state->is_interp_only_mode()) { 1550 // for any thread that actually wants method exit, interp_only_mode is set 1551 return; 1552 } 1553 1554 // return a flag when a method terminates by throwing an exception 1555 // i.e. if an exception is thrown and it's not caught by the current method 1556 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1557 1558 1559 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1560 Handle result; 1561 jvalue value; 1562 value.j = 0L; 1563 1564 // if the method hasn't been popped because of an exception then we populate 1565 // the return_value parameter for the callback. At this point we only have 1566 // the address of a "raw result" and we just call into the interpreter to 1567 // convert this into a jvalue. 1568 if (!exception_exit) { 1569 oop oop_result; 1570 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1571 if (type == T_OBJECT || type == T_ARRAY) { 1572 result = Handle(thread, oop_result); 1573 } 1574 } 1575 1576 JvmtiEnvThreadStateIterator it(state); 1577 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1578 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1579 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s", 1580 JvmtiTrace::safe_get_thread_name(thread), 1581 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1582 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1583 1584 JvmtiEnv *env = ets->get_env(); 1585 JvmtiMethodEventMark jem(thread, mh); 1586 if (result.not_null()) { 1587 value.l = JNIHandles::make_local(thread, result()); 1588 } 1589 JvmtiJavaThreadEventTransition jet(thread); 1590 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1591 if (callback != NULL) { 1592 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1593 jem.jni_methodID(), exception_exit, value); 1594 } 1595 } 1596 } 1597 } 1598 1599 JvmtiEnvThreadStateIterator it(state); 1600 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1601 if (ets->has_frame_pops()) { 1602 int cur_frame_number = state->cur_stack_depth(); 1603 1604 if (ets->is_frame_pop(cur_frame_number)) { 1605 // we have a NotifyFramePop entry for this frame. 1606 // now check that this env/thread wants this event 1607 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1608 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s", 1609 JvmtiTrace::safe_get_thread_name(thread), 1610 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1611 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1612 1613 // we also need to issue a frame pop event for this frame 1614 JvmtiEnv *env = ets->get_env(); 1615 JvmtiMethodEventMark jem(thread, mh); 1616 JvmtiJavaThreadEventTransition jet(thread); 1617 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1618 if (callback != NULL) { 1619 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1620 jem.jni_methodID(), exception_exit); 1621 } 1622 } 1623 // remove the frame's entry 1624 ets->clear_frame_pop(cur_frame_number); 1625 } 1626 } 1627 } 1628 1629 state->decr_cur_stack_depth(); 1630 } 1631 1632 1633 // Todo: inline this for optimization 1634 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) { 1635 HandleMark hm(thread); 1636 methodHandle mh(thread, method); 1637 1638 JvmtiThreadState *state = thread->jvmti_thread_state(); 1639 if (state == NULL) { 1640 return; 1641 } 1642 JvmtiEnvThreadStateIterator it(state); 1643 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1644 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1645 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1646 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT, 1647 JvmtiTrace::safe_get_thread_name(thread), 1648 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1649 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1650 location - mh()->code_base() )); 1651 1652 JvmtiEnv *env = ets->get_env(); 1653 JvmtiLocationEventMark jem(thread, mh, location); 1654 JvmtiJavaThreadEventTransition jet(thread); 1655 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1656 if (callback != NULL) { 1657 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1658 jem.jni_methodID(), jem.location()); 1659 } 1660 1661 ets->set_single_stepping_posted(); 1662 } 1663 } 1664 } 1665 1666 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) { 1667 HandleMark hm(thread); 1668 methodHandle mh(thread, method); 1669 Handle exception_handle(thread, exception); 1670 1671 JvmtiThreadState *state = thread->jvmti_thread_state(); 1672 if (state == NULL) { 1673 return; 1674 } 1675 1676 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered", 1677 JvmtiTrace::safe_get_thread_name(thread))); 1678 if (!state->is_exception_detected()) { 1679 state->set_exception_detected(); 1680 JvmtiEnvThreadStateIterator it(state); 1681 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1682 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1683 1684 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1685 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT, 1686 JvmtiTrace::safe_get_thread_name(thread), 1687 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1688 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1689 location - mh()->code_base() )); 1690 1691 JvmtiEnv *env = ets->get_env(); 1692 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1693 1694 // It's okay to clear these exceptions here because we duplicate 1695 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1696 EXCEPTION_MARK; 1697 1698 bool should_repeat; 1699 vframeStream st(thread); 1700 assert(!st.at_end(), "cannot be at end"); 1701 Method* current_method = NULL; 1702 // A GC may occur during the Method::fast_exception_handler_bci_for() 1703 // call below if it needs to load the constraint class. Using a 1704 // methodHandle to keep the 'current_method' from being deallocated 1705 // if GC happens. 1706 methodHandle current_mh = methodHandle(thread, current_method); 1707 int current_bci = -1; 1708 do { 1709 current_method = st.method(); 1710 current_mh = methodHandle(thread, current_method); 1711 current_bci = st.bci(); 1712 do { 1713 should_repeat = false; 1714 Klass* eh_klass = exception_handle()->klass(); 1715 current_bci = Method::fast_exception_handler_bci_for( 1716 current_mh, eh_klass, current_bci, THREAD); 1717 if (HAS_PENDING_EXCEPTION) { 1718 exception_handle = Handle(thread, PENDING_EXCEPTION); 1719 CLEAR_PENDING_EXCEPTION; 1720 should_repeat = true; 1721 } 1722 } while (should_repeat && (current_bci != -1)); 1723 st.next(); 1724 } while ((current_bci < 0) && (!st.at_end())); 1725 1726 jmethodID catch_jmethodID; 1727 if (current_bci < 0) { 1728 catch_jmethodID = 0; 1729 current_bci = 0; 1730 } else { 1731 catch_jmethodID = jem.to_jmethodID(current_mh); 1732 } 1733 1734 JvmtiJavaThreadEventTransition jet(thread); 1735 jvmtiEventException callback = env->callbacks()->Exception; 1736 if (callback != NULL) { 1737 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1738 jem.jni_methodID(), jem.location(), 1739 jem.exception(), 1740 catch_jmethodID, current_bci); 1741 } 1742 } 1743 } 1744 } 1745 1746 // frames may get popped because of this throw, be safe - invalidate cached depth 1747 state->invalidate_cur_stack_depth(); 1748 } 1749 1750 1751 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) { 1752 HandleMark hm(thread); 1753 methodHandle mh(thread, method); 1754 Handle exception_handle(thread, exception); 1755 1756 JvmtiThreadState *state = thread->jvmti_thread_state(); 1757 if (state == NULL) { 1758 return; 1759 } 1760 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1761 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s", 1762 JvmtiTrace::safe_get_thread_name(thread), 1763 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1764 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1765 location==0? "no location:" : "", 1766 location==0? 0 : location - mh()->code_base(), 1767 in_handler_frame? "in handler frame" : "not handler frame" )); 1768 1769 if (state->is_exception_detected()) { 1770 1771 state->invalidate_cur_stack_depth(); 1772 if (!in_handler_frame) { 1773 // Not in exception handler. 1774 if(state->is_interp_only_mode()) { 1775 // method exit and frame pop events are posted only in interp mode. 1776 // When these events are enabled code should be in running in interp mode. 1777 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1778 // The cached cur_stack_depth might have changed from the 1779 // operations of frame pop or method exit. We are not 100% sure 1780 // the cached cur_stack_depth is still valid depth so invalidate 1781 // it. 1782 state->invalidate_cur_stack_depth(); 1783 } 1784 } else { 1785 // In exception handler frame. Report exception catch. 1786 assert(location != NULL, "must be a known location"); 1787 // Update cur_stack_depth - the frames above the current frame 1788 // have been unwound due to this exception: 1789 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1790 state->set_exception_caught(); 1791 1792 JvmtiEnvThreadStateIterator it(state); 1793 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1794 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1795 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1796 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT, 1797 JvmtiTrace::safe_get_thread_name(thread), 1798 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1799 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1800 location - mh()->code_base() )); 1801 1802 JvmtiEnv *env = ets->get_env(); 1803 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1804 JvmtiJavaThreadEventTransition jet(thread); 1805 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1806 if (callback != NULL) { 1807 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1808 jem.jni_methodID(), jem.location(), 1809 jem.exception()); 1810 } 1811 } 1812 } 1813 } 1814 } 1815 } 1816 1817 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1818 Klass* klass, jfieldID fieldID, bool is_static) { 1819 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1820 // At least one field access watch is set so we have more work 1821 // to do. This wrapper is used by entry points that allow us 1822 // to create handles in post_field_access_by_jni(). 1823 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1824 // event posting can block so refetch oop if we were passed a jobj 1825 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1826 } 1827 return obj; 1828 } 1829 1830 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1831 Klass* klass, jfieldID fieldID, bool is_static) { 1832 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1833 // At least one field access watch is set so we have more work 1834 // to do. This wrapper is used by "quick" entry points that don't 1835 // allow us to create handles in post_field_access_by_jni(). We 1836 // override that with a ResetNoHandleMark. 1837 ResetNoHandleMark rnhm; 1838 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1839 // event posting can block so refetch oop if we were passed a jobj 1840 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1841 } 1842 return obj; 1843 } 1844 1845 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1846 Klass* klass, jfieldID fieldID, bool is_static) { 1847 // We must be called with a Java context in order to provide reasonable 1848 // values for the klazz, method, and location fields. The callers of this 1849 // function don't make the call unless there is a Java context. 1850 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1851 1852 ResourceMark rm; 1853 fieldDescriptor fd; 1854 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1855 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1856 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1857 if (!valid_fieldID) return; 1858 // field accesses are not watched so bail 1859 if (!fd.is_field_access_watched()) return; 1860 1861 HandleMark hm(thread); 1862 Handle h_obj; 1863 if (!is_static) { 1864 // non-static field accessors have an object, but we need a handle 1865 assert(obj != NULL, "non-static needs an object"); 1866 h_obj = Handle(thread, obj); 1867 } 1868 post_field_access(thread, 1869 thread->last_frame().interpreter_frame_method(), 1870 thread->last_frame().interpreter_frame_bcp(), 1871 klass, h_obj, fieldID); 1872 } 1873 1874 void JvmtiExport::post_field_access(JavaThread *thread, Method* method, 1875 address location, Klass* field_klass, Handle object, jfieldID field) { 1876 1877 HandleMark hm(thread); 1878 methodHandle mh(thread, method); 1879 1880 JvmtiThreadState *state = thread->jvmti_thread_state(); 1881 if (state == NULL) { 1882 return; 1883 } 1884 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered", 1885 JvmtiTrace::safe_get_thread_name(thread))); 1886 JvmtiEnvThreadStateIterator it(state); 1887 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1888 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1889 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT, 1890 JvmtiTrace::safe_get_thread_name(thread), 1891 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1892 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1893 location - mh()->code_base() )); 1894 1895 JvmtiEnv *env = ets->get_env(); 1896 JvmtiLocationEventMark jem(thread, mh, location); 1897 jclass field_jclass = jem.to_jclass(field_klass); 1898 jobject field_jobject = jem.to_jobject(object()); 1899 JvmtiJavaThreadEventTransition jet(thread); 1900 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1901 if (callback != NULL) { 1902 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1903 jem.jni_methodID(), jem.location(), 1904 field_jclass, field_jobject, field); 1905 } 1906 } 1907 } 1908 } 1909 1910 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1911 Klass* klass, jfieldID fieldID, bool is_static, 1912 char sig_type, jvalue *value) { 1913 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1914 // At least one field modification watch is set so we have more work 1915 // to do. This wrapper is used by entry points that allow us 1916 // to create handles in post_field_modification_by_jni(). 1917 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1918 // event posting can block so refetch oop if we were passed a jobj 1919 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1920 } 1921 return obj; 1922 } 1923 1924 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1925 Klass* klass, jfieldID fieldID, bool is_static, 1926 char sig_type, jvalue *value) { 1927 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1928 // At least one field modification watch is set so we have more work 1929 // to do. This wrapper is used by "quick" entry points that don't 1930 // allow us to create handles in post_field_modification_by_jni(). We 1931 // override that with a ResetNoHandleMark. 1932 ResetNoHandleMark rnhm; 1933 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1934 // event posting can block so refetch oop if we were passed a jobj 1935 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1936 } 1937 return obj; 1938 } 1939 1940 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1941 Klass* klass, jfieldID fieldID, bool is_static, 1942 char sig_type, jvalue *value) { 1943 // We must be called with a Java context in order to provide reasonable 1944 // values for the klazz, method, and location fields. The callers of this 1945 // function don't make the call unless there is a Java context. 1946 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1947 1948 ResourceMark rm; 1949 fieldDescriptor fd; 1950 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1951 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1952 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1953 if (!valid_fieldID) return; 1954 // field modifications are not watched so bail 1955 if (!fd.is_field_modification_watched()) return; 1956 1957 HandleMark hm(thread); 1958 1959 Handle h_obj; 1960 if (!is_static) { 1961 // non-static field accessors have an object, but we need a handle 1962 assert(obj != NULL, "non-static needs an object"); 1963 h_obj = Handle(thread, obj); 1964 } 1965 post_field_modification(thread, 1966 thread->last_frame().interpreter_frame_method(), 1967 thread->last_frame().interpreter_frame_bcp(), 1968 klass, h_obj, fieldID, sig_type, value); 1969 } 1970 1971 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method, 1972 address location, Klass* field_klass, Handle object, jfieldID field, 1973 char sig_type, jvalue *value) { 1974 1975 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') { 1976 // 'I' instructions are used for byte, char, short and int. 1977 // determine which it really is, and convert 1978 fieldDescriptor fd; 1979 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd); 1980 // should be found (if not, leave as is) 1981 if (found) { 1982 jint ival = value->i; 1983 // convert value from int to appropriate type 1984 switch (fd.field_type()) { 1985 case T_BOOLEAN: 1986 sig_type = 'Z'; 1987 value->i = 0; // clear it 1988 value->z = (jboolean)ival; 1989 break; 1990 case T_BYTE: 1991 sig_type = 'B'; 1992 value->i = 0; // clear it 1993 value->b = (jbyte)ival; 1994 break; 1995 case T_CHAR: 1996 sig_type = 'C'; 1997 value->i = 0; // clear it 1998 value->c = (jchar)ival; 1999 break; 2000 case T_SHORT: 2001 sig_type = 'S'; 2002 value->i = 0; // clear it 2003 value->s = (jshort)ival; 2004 break; 2005 case T_INT: 2006 // nothing to do 2007 break; 2008 default: 2009 // this is an integer instruction, should be one of above 2010 ShouldNotReachHere(); 2011 break; 2012 } 2013 } 2014 } 2015 2016 assert(sig_type != '[', "array should have sig_type == 'L'"); 2017 bool handle_created = false; 2018 2019 // convert oop to JNI handle. 2020 if (sig_type == 'L') { 2021 handle_created = true; 2022 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 2023 } 2024 2025 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 2026 2027 // Destroy the JNI handle allocated above. 2028 if (handle_created) { 2029 JNIHandles::destroy_local(value->l); 2030 } 2031 } 2032 2033 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method, 2034 address location, Klass* field_klass, Handle object, jfieldID field, 2035 char sig_type, jvalue *value_ptr) { 2036 2037 HandleMark hm(thread); 2038 methodHandle mh(thread, method); 2039 2040 JvmtiThreadState *state = thread->jvmti_thread_state(); 2041 if (state == NULL) { 2042 return; 2043 } 2044 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2045 ("[%s] Trg Field Modification event triggered", 2046 JvmtiTrace::safe_get_thread_name(thread))); 2047 2048 JvmtiEnvThreadStateIterator it(state); 2049 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2050 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 2051 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2052 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT, 2053 JvmtiTrace::safe_get_thread_name(thread), 2054 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 2055 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 2056 location - mh()->code_base() )); 2057 2058 JvmtiEnv *env = ets->get_env(); 2059 JvmtiLocationEventMark jem(thread, mh, location); 2060 jclass field_jclass = jem.to_jclass(field_klass); 2061 jobject field_jobject = jem.to_jobject(object()); 2062 JvmtiJavaThreadEventTransition jet(thread); 2063 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 2064 if (callback != NULL) { 2065 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2066 jem.jni_methodID(), jem.location(), 2067 field_jclass, field_jobject, field, sig_type, *value_ptr); 2068 } 2069 } 2070 } 2071 } 2072 2073 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) { 2074 JavaThread* thread = JavaThread::current(); 2075 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 2076 2077 HandleMark hm(thread); 2078 methodHandle mh(thread, method); 2079 2080 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered", 2081 JvmtiTrace::safe_get_thread_name(thread))); 2082 2083 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2084 JvmtiEnvIterator it; 2085 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2086 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2087 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent", 2088 JvmtiTrace::safe_get_thread_name(thread) )); 2089 2090 JvmtiMethodEventMark jem(thread, mh); 2091 JvmtiJavaThreadEventTransition jet(thread); 2092 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env(); 2093 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 2094 if (callback != NULL) { 2095 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 2096 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 2097 } 2098 } 2099 } 2100 } 2101 } 2102 2103 // Returns a record containing inlining information for the given nmethod 2104 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 2105 jint numstackframes = 0; 2106 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 2107 record->header.kind = JVMTI_CMLR_INLINE_INFO; 2108 record->header.next = NULL; 2109 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 2110 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 2111 record->numpcs = 0; 2112 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2113 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2114 record->numpcs++; 2115 } 2116 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 2117 int scope = 0; 2118 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2119 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2120 void* pc_address = (void*)p->real_pc(nm); 2121 assert(pc_address != NULL, "pc_address must be non-null"); 2122 record->pcinfo[scope].pc = pc_address; 2123 numstackframes=0; 2124 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2125 numstackframes++; 2126 } 2127 assert(numstackframes != 0, "numstackframes must be nonzero."); 2128 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 2129 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 2130 record->pcinfo[scope].numstackframes = numstackframes; 2131 int stackframe = 0; 2132 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2133 // 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() 2134 assert(sd->method() != NULL, "sd->method() cannot be null."); 2135 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 2136 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 2137 stackframe++; 2138 } 2139 scope++; 2140 } 2141 return record; 2142 } 2143 2144 void JvmtiExport::post_compiled_method_load(nmethod *nm) { 2145 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 2146 return; 2147 } 2148 JavaThread* thread = JavaThread::current(); 2149 2150 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2151 ("[%s] method compile load event triggered", 2152 JvmtiTrace::safe_get_thread_name(thread))); 2153 2154 JvmtiEnvIterator it; 2155 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2156 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 2157 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 2158 continue; 2159 } 2160 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2161 ("[%s] class compile method load event sent %s.%s ", 2162 JvmtiTrace::safe_get_thread_name(thread), 2163 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 2164 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 2165 ResourceMark rm(thread); 2166 HandleMark hm(thread); 2167 2168 // Add inlining information 2169 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 2170 // Pass inlining information through the void pointer 2171 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 2172 JvmtiJavaThreadEventTransition jet(thread); 2173 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 2174 if (callback != NULL) { 2175 (*callback)(env->jvmti_external(), jem.jni_methodID(), 2176 jem.code_size(), jem.code_data(), jem.map_length(), 2177 jem.map(), jem.compile_info()); 2178 } 2179 } 2180 } 2181 } 2182 2183 2184 // post a COMPILED_METHOD_LOAD event for a given environment 2185 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, 2186 const void *code_begin, const jint map_length, 2187 const jvmtiAddrLocationMap* map) 2188 { 2189 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) { 2190 return; 2191 } 2192 JavaThread* thread = JavaThread::current(); 2193 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2194 ("[%s] method compile load event triggered (by GenerateEvents)", 2195 JvmtiTrace::safe_get_thread_name(thread))); 2196 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 2197 2198 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2199 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT, 2200 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 2201 2202 JvmtiEventMark jem(thread); 2203 JvmtiJavaThreadEventTransition jet(thread); 2204 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 2205 if (callback != NULL) { 2206 (*callback)(env->jvmti_external(), method, 2207 length, code_begin, map_length, 2208 map, NULL); 2209 } 2210 } 2211 } 2212 2213 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 2214 assert(name != NULL && name[0] != '\0', "sanity check"); 2215 2216 JavaThread* thread = JavaThread::current(); 2217 // In theory everyone coming thru here is in_vm but we need to be certain 2218 // because a callee will do a vm->native transition 2219 ThreadInVMfromUnknown __tiv; 2220 2221 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2222 ("[%s] method dynamic code generated event triggered", 2223 JvmtiTrace::safe_get_thread_name(thread))); 2224 JvmtiEnvIterator it; 2225 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2226 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2227 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2228 ("[%s] dynamic code generated event sent for %s", 2229 JvmtiTrace::safe_get_thread_name(thread), name)); 2230 JvmtiEventMark jem(thread); 2231 JvmtiJavaThreadEventTransition jet(thread); 2232 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2233 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2234 if (callback != NULL) { 2235 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2236 } 2237 } 2238 } 2239 } 2240 2241 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 2242 jvmtiPhase phase = JvmtiEnv::get_phase(); 2243 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 2244 post_dynamic_code_generated_internal(name, code_begin, code_end); 2245 } else { 2246 // It may not be safe to post the event from this thread. Defer all 2247 // postings to the service thread so that it can perform them in a safe 2248 // context and in-order. 2249 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); 2250 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 2251 name, code_begin, code_end); 2252 JvmtiDeferredEventQueue::enqueue(event); 2253 } 2254 } 2255 2256 2257 // post a DYNAMIC_CODE_GENERATED event for a given environment 2258 // used by GenerateEvents 2259 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 2260 const void *code_begin, const void *code_end) 2261 { 2262 JavaThread* thread = JavaThread::current(); 2263 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2264 ("[%s] dynamic code generated event triggered (by GenerateEvents)", 2265 JvmtiTrace::safe_get_thread_name(thread))); 2266 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2267 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2268 ("[%s] dynamic code generated event sent for %s", 2269 JvmtiTrace::safe_get_thread_name(thread), name)); 2270 JvmtiEventMark jem(thread); 2271 JvmtiJavaThreadEventTransition jet(thread); 2272 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2273 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2274 if (callback != NULL) { 2275 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2276 } 2277 } 2278 } 2279 2280 // post a DynamicCodeGenerated event while holding locks in the VM. 2281 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 2282 address code_begin, address code_end) 2283 { 2284 // register the stub with the current dynamic code event collector 2285 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2286 // state can only be NULL if the current thread is exiting which 2287 // should not happen since we're trying to post an event 2288 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 2289 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 2290 guarantee(collector != NULL, "attempt to register stub without event collector"); 2291 collector->register_stub(name, code_begin, code_end); 2292 } 2293 2294 // Collect all the vm internally allocated objects which are visible to java world 2295 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 2296 Thread* thread = Thread::current_or_null(); 2297 if (thread != NULL && thread->is_Java_thread()) { 2298 // Can not take safepoint here. 2299 NoSafepointVerifier no_sfpt; 2300 // Can not take safepoint here so can not use state_for to get 2301 // jvmti thread state. 2302 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2303 if (state != NULL) { 2304 // state is non NULL when VMObjectAllocEventCollector is enabled. 2305 JvmtiVMObjectAllocEventCollector *collector; 2306 collector = state->get_vm_object_alloc_event_collector(); 2307 if (collector != NULL && collector->is_enabled()) { 2308 // Don't record classes as these will be notified via the ClassLoad 2309 // event. 2310 if (obj->klass() != SystemDictionary::Class_klass()) { 2311 collector->record_allocation(obj); 2312 } 2313 } 2314 } 2315 } 2316 } 2317 2318 // Collect all the sampled allocated objects. 2319 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) { 2320 Thread* thread = Thread::current_or_null(); 2321 if (thread != NULL && thread->is_Java_thread()) { 2322 // Can not take safepoint here. 2323 NoSafepointVerifier no_sfpt; 2324 // Can not take safepoint here so can not use state_for to get 2325 // jvmti thread state. 2326 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2327 if (state != NULL) { 2328 // state is non NULL when SampledObjectAllocEventCollector is enabled. 2329 JvmtiSampledObjectAllocEventCollector *collector; 2330 collector = state->get_sampled_object_alloc_event_collector(); 2331 2332 if (collector != NULL && collector->is_enabled()) { 2333 collector->record_allocation(obj); 2334 } 2335 } 2336 } 2337 } 2338 2339 void JvmtiExport::post_garbage_collection_finish() { 2340 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 2341 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2342 ("[%s] garbage collection finish event triggered", 2343 JvmtiTrace::safe_get_thread_name(thread))); 2344 JvmtiEnvIterator it; 2345 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2346 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 2347 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2348 ("[%s] garbage collection finish event sent", 2349 JvmtiTrace::safe_get_thread_name(thread))); 2350 JvmtiThreadEventTransition jet(thread); 2351 // JNIEnv is NULL here because this event is posted from VM Thread 2352 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 2353 if (callback != NULL) { 2354 (*callback)(env->jvmti_external()); 2355 } 2356 } 2357 } 2358 } 2359 2360 void JvmtiExport::post_garbage_collection_start() { 2361 Thread* thread = Thread::current(); // this event is posted from vm-thread. 2362 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2363 ("[%s] garbage collection start event triggered", 2364 JvmtiTrace::safe_get_thread_name(thread))); 2365 JvmtiEnvIterator it; 2366 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2367 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 2368 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2369 ("[%s] garbage collection start event sent", 2370 JvmtiTrace::safe_get_thread_name(thread))); 2371 JvmtiThreadEventTransition jet(thread); 2372 // JNIEnv is NULL here because this event is posted from VM Thread 2373 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 2374 if (callback != NULL) { 2375 (*callback)(env->jvmti_external()); 2376 } 2377 } 2378 } 2379 } 2380 2381 void JvmtiExport::post_data_dump() { 2382 Thread *thread = Thread::current(); 2383 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2384 ("[%s] data dump request event triggered", 2385 JvmtiTrace::safe_get_thread_name(thread))); 2386 JvmtiEnvIterator it; 2387 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2388 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 2389 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2390 ("[%s] data dump request event sent", 2391 JvmtiTrace::safe_get_thread_name(thread))); 2392 JvmtiThreadEventTransition jet(thread); 2393 // JNIEnv is NULL here because this event is posted from VM Thread 2394 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 2395 if (callback != NULL) { 2396 (*callback)(env->jvmti_external()); 2397 } 2398 } 2399 } 2400 } 2401 2402 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 2403 oop object = (oop)obj_mntr->object(); 2404 JvmtiThreadState *state = thread->jvmti_thread_state(); 2405 if (state == NULL) { 2406 return; 2407 } 2408 2409 HandleMark hm(thread); 2410 Handle h(thread, object); 2411 2412 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2413 ("[%s] montior contended enter event triggered", 2414 JvmtiTrace::safe_get_thread_name(thread))); 2415 2416 JvmtiEnvThreadStateIterator it(state); 2417 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2418 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2419 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2420 ("[%s] monitor contended enter event sent", 2421 JvmtiTrace::safe_get_thread_name(thread))); 2422 JvmtiMonitorEventMark jem(thread, h()); 2423 JvmtiEnv *env = ets->get_env(); 2424 JvmtiThreadEventTransition jet(thread); 2425 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2426 if (callback != NULL) { 2427 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2428 } 2429 } 2430 } 2431 } 2432 2433 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2434 oop object = (oop)obj_mntr->object(); 2435 JvmtiThreadState *state = thread->jvmti_thread_state(); 2436 if (state == NULL) { 2437 return; 2438 } 2439 2440 HandleMark hm(thread); 2441 Handle h(thread, object); 2442 2443 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2444 ("[%s] montior contended entered event triggered", 2445 JvmtiTrace::safe_get_thread_name(thread))); 2446 2447 JvmtiEnvThreadStateIterator it(state); 2448 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2449 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2450 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2451 ("[%s] monitor contended enter event sent", 2452 JvmtiTrace::safe_get_thread_name(thread))); 2453 JvmtiMonitorEventMark jem(thread, h()); 2454 JvmtiEnv *env = ets->get_env(); 2455 JvmtiThreadEventTransition jet(thread); 2456 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2457 if (callback != NULL) { 2458 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2459 } 2460 } 2461 } 2462 } 2463 2464 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2465 jlong timeout) { 2466 JvmtiThreadState *state = thread->jvmti_thread_state(); 2467 if (state == NULL) { 2468 return; 2469 } 2470 2471 HandleMark hm(thread); 2472 Handle h(thread, object); 2473 2474 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2475 ("[%s] montior wait event triggered", 2476 JvmtiTrace::safe_get_thread_name(thread))); 2477 2478 JvmtiEnvThreadStateIterator it(state); 2479 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2480 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2481 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2482 ("[%s] monitor wait event sent", 2483 JvmtiTrace::safe_get_thread_name(thread))); 2484 JvmtiMonitorEventMark jem(thread, h()); 2485 JvmtiEnv *env = ets->get_env(); 2486 JvmtiThreadEventTransition jet(thread); 2487 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2488 if (callback != NULL) { 2489 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2490 jem.jni_object(), timeout); 2491 } 2492 } 2493 } 2494 } 2495 2496 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2497 oop object = (oop)obj_mntr->object(); 2498 JvmtiThreadState *state = thread->jvmti_thread_state(); 2499 if (state == NULL) { 2500 return; 2501 } 2502 2503 HandleMark hm(thread); 2504 Handle h(thread, object); 2505 2506 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2507 ("[%s] montior waited event triggered", 2508 JvmtiTrace::safe_get_thread_name(thread))); 2509 2510 JvmtiEnvThreadStateIterator it(state); 2511 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2512 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2513 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2514 ("[%s] monitor waited event sent", 2515 JvmtiTrace::safe_get_thread_name(thread))); 2516 JvmtiMonitorEventMark jem(thread, h()); 2517 JvmtiEnv *env = ets->get_env(); 2518 JvmtiThreadEventTransition jet(thread); 2519 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2520 if (callback != NULL) { 2521 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2522 jem.jni_object(), timed_out); 2523 } 2524 } 2525 } 2526 } 2527 2528 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2529 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered", 2530 JvmtiTrace::safe_get_thread_name(thread))); 2531 if (object == NULL) { 2532 return; 2533 } 2534 HandleMark hm(thread); 2535 Handle h(thread, object); 2536 JvmtiEnvIterator it; 2537 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2538 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2539 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s", 2540 JvmtiTrace::safe_get_thread_name(thread), 2541 object==NULL? "NULL" : object->klass()->external_name())); 2542 2543 JvmtiObjectAllocEventMark jem(thread, h()); 2544 JvmtiJavaThreadEventTransition jet(thread); 2545 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2546 if (callback != NULL) { 2547 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2548 jem.jni_jobject(), jem.jni_class(), jem.size()); 2549 } 2550 } 2551 } 2552 } 2553 2554 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) { 2555 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2556 ("[%s] Trg sampled object alloc triggered", 2557 JvmtiTrace::safe_get_thread_name(thread))); 2558 if (object == NULL) { 2559 return; 2560 } 2561 HandleMark hm(thread); 2562 Handle h(thread, object); 2563 JvmtiEnvIterator it; 2564 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2565 if (env->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) { 2566 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2567 ("[%s] Evt sampled object alloc sent %s", 2568 JvmtiTrace::safe_get_thread_name(thread), 2569 object == NULL ? "NULL" : object->klass()->external_name())); 2570 2571 JvmtiObjectAllocEventMark jem(thread, h()); 2572 JvmtiJavaThreadEventTransition jet(thread); 2573 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc; 2574 if (callback != NULL) { 2575 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2576 jem.jni_jobject(), jem.jni_class(), jem.size()); 2577 } 2578 } 2579 } 2580 } 2581 2582 //////////////////////////////////////////////////////////////////////////////////////////////// 2583 2584 void JvmtiExport::cleanup_thread(JavaThread* thread) { 2585 assert(JavaThread::current() == thread, "thread is not current"); 2586 MutexLocker mu(JvmtiThreadState_lock); 2587 2588 if (thread->jvmti_thread_state() != NULL) { 2589 // This has to happen after the thread state is removed, which is 2590 // why it is not in post_thread_end_event like its complement 2591 // Maybe both these functions should be rolled into the posts? 2592 JvmtiEventController::thread_ended(thread); 2593 } 2594 } 2595 2596 void JvmtiExport::clear_detected_exception(JavaThread* thread) { 2597 assert(JavaThread::current() == thread, "thread is not current"); 2598 2599 JvmtiThreadState* state = thread->jvmti_thread_state(); 2600 if (state != NULL) { 2601 state->clear_exception_state(); 2602 } 2603 } 2604 2605 void JvmtiExport::oops_do(OopClosure* f) { 2606 JvmtiCurrentBreakpoints::oops_do(f); 2607 JvmtiObjectAllocEventCollector::oops_do_for_all_threads(f); 2608 } 2609 2610 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { 2611 JvmtiTagMap::weak_oops_do(is_alive, f); 2612 } 2613 2614 void JvmtiExport::gc_epilogue() { 2615 JvmtiCurrentBreakpoints::gc_epilogue(); 2616 } 2617 2618 // Onload raw monitor transition. 2619 void JvmtiExport::transition_pending_onload_raw_monitors() { 2620 JvmtiPendingMonitors::transition_raw_monitors(); 2621 } 2622 2623 //////////////////////////////////////////////////////////////////////////////////////////////// 2624 #if INCLUDE_SERVICES 2625 // Attach is disabled if SERVICES is not included 2626 2627 // type for the Agent_OnAttach entry point 2628 extern "C" { 2629 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2630 } 2631 2632 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam, 2633 const char *options, outputStream* st) { 2634 char ebuf[1024] = {0}; 2635 char buffer[JVM_MAXPATHLEN]; 2636 void* library = NULL; 2637 jint result = JNI_ERR; 2638 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2639 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols); 2640 2641 // The abs paramter should be "true" or "false" 2642 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2643 2644 // Initially marked as invalid. It will be set to valid if we can find the agent 2645 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL); 2646 2647 // Check for statically linked in agent. If not found then if the path is 2648 // absolute we attempt to load the library. Otherwise we try to load it 2649 // from the standard dll directory. 2650 2651 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) { 2652 if (is_absolute_path) { 2653 library = os::dll_load(agent, ebuf, sizeof ebuf); 2654 } else { 2655 // Try to load the agent from the standard dll directory 2656 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(), 2657 agent)) { 2658 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2659 } 2660 if (library == NULL) { 2661 // not found - try OS default library path 2662 if (os::dll_build_name(buffer, sizeof(buffer), agent)) { 2663 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2664 } 2665 } 2666 } 2667 if (library != NULL) { 2668 agent_lib->set_os_lib(library); 2669 agent_lib->set_valid(); 2670 } 2671 } 2672 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2673 // function 2674 if (agent_lib->valid()) { 2675 // Lookup the Agent_OnAttach function 2676 OnAttachEntry_t on_attach_entry = NULL; 2677 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, 2678 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries)); 2679 if (on_attach_entry == NULL) { 2680 // Agent_OnAttach missing - unload library 2681 if (!agent_lib->is_static_lib()) { 2682 os::dll_unload(library); 2683 } 2684 st->print_cr("%s is not available in %s", 2685 on_attach_symbols[0], agent_lib->name()); 2686 delete agent_lib; 2687 } else { 2688 // Invoke the Agent_OnAttach function 2689 JavaThread* THREAD = JavaThread::current(); 2690 { 2691 extern struct JavaVM_ main_vm; 2692 JvmtiThreadEventMark jem(THREAD); 2693 JvmtiJavaThreadEventTransition jet(THREAD); 2694 2695 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2696 } 2697 2698 // Agent_OnAttach may have used JNI 2699 if (HAS_PENDING_EXCEPTION) { 2700 CLEAR_PENDING_EXCEPTION; 2701 } 2702 2703 // If OnAttach returns JNI_OK then we add it to the list of 2704 // agent libraries so that we can call Agent_OnUnload later. 2705 if (result == JNI_OK) { 2706 Arguments::add_loaded_agent(agent_lib); 2707 } else { 2708 delete agent_lib; 2709 } 2710 2711 // Agent_OnAttach executed so completion status is JNI_OK 2712 st->print_cr("return code: %d", result); 2713 result = JNI_OK; 2714 } 2715 } else { 2716 st->print_cr("%s was not loaded.", agent); 2717 if (*ebuf != '\0') { 2718 st->print_cr("%s", ebuf); 2719 } 2720 } 2721 return result; 2722 } 2723 2724 #endif // INCLUDE_SERVICES 2725 //////////////////////////////////////////////////////////////////////////////////////////////// 2726 2727 // Setup current current thread for event collection. 2728 void JvmtiEventCollector::setup_jvmti_thread_state() { 2729 // set this event collector to be the current one. 2730 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2731 // state can only be NULL if the current thread is exiting which 2732 // should not happen since we're trying to configure for event collection 2733 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2734 if (is_vm_object_alloc_event()) { 2735 JvmtiVMObjectAllocEventCollector *prev = state->get_vm_object_alloc_event_collector(); 2736 2737 // If we have a previous collector and it is disabled, it means this allocation came from a 2738 // callback induced VM Object allocation, do not register this collector then. 2739 if (prev && !prev->is_enabled()) { 2740 return; 2741 } 2742 _prev = prev; 2743 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2744 } else if (is_dynamic_code_event()) { 2745 _prev = state->get_dynamic_code_event_collector(); 2746 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2747 } else if (is_sampled_object_alloc_event()) { 2748 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector(); 2749 2750 if (prev) { 2751 // JvmtiSampledObjectAllocEventCollector wants only one active collector 2752 // enabled. This allows to have a collector detect a user code requiring 2753 // a sample in the callback. 2754 return; 2755 } 2756 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this); 2757 } 2758 2759 _unset_jvmti_thread_state = true; 2760 } 2761 2762 // Unset current event collection in this thread and reset it with previous 2763 // collector. 2764 void JvmtiEventCollector::unset_jvmti_thread_state() { 2765 if (!_unset_jvmti_thread_state) { 2766 return; 2767 } 2768 2769 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2770 if (state != NULL) { 2771 // restore the previous event collector (if any) 2772 if (is_vm_object_alloc_event()) { 2773 if (state->get_vm_object_alloc_event_collector() == this) { 2774 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2775 } else { 2776 // this thread's jvmti state was created during the scope of 2777 // the event collector. 2778 } 2779 } else if (is_dynamic_code_event()) { 2780 if (state->get_dynamic_code_event_collector() == this) { 2781 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2782 } else { 2783 // this thread's jvmti state was created during the scope of 2784 // the event collector. 2785 } 2786 } else if (is_sampled_object_alloc_event()) { 2787 if (state->get_sampled_object_alloc_event_collector() == this) { 2788 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev); 2789 } else { 2790 // this thread's jvmti state was created during the scope of 2791 // the event collector. 2792 } 2793 } 2794 } 2795 } 2796 2797 // create the dynamic code event collector 2798 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2799 if (JvmtiExport::should_post_dynamic_code_generated()) { 2800 setup_jvmti_thread_state(); 2801 } 2802 } 2803 2804 // iterate over any code blob descriptors collected and post a 2805 // DYNAMIC_CODE_GENERATED event to the profiler. 2806 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2807 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2808 // iterate over any code blob descriptors that we collected 2809 if (_code_blobs != NULL) { 2810 for (int i=0; i<_code_blobs->length(); i++) { 2811 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2812 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2813 FreeHeap(blob); 2814 } 2815 delete _code_blobs; 2816 } 2817 unset_jvmti_thread_state(); 2818 } 2819 2820 // register a stub 2821 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2822 if (_code_blobs == NULL) { 2823 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true); 2824 } 2825 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2826 } 2827 2828 // Setup current thread to record vm allocated objects. 2829 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() : 2830 _allocated(NULL), _enable(false), _post_callback(NULL) { 2831 } 2832 2833 // Post vm_object_alloc event for vm allocated objects visible to java 2834 // world. 2835 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() { 2836 if (_allocated) { 2837 set_enabled(false); 2838 for (int i = 0; i < _allocated->length(); i++) { 2839 oop obj = _allocated->at(i); 2840 _post_callback(JavaThread::current(), obj); 2841 } 2842 delete _allocated, _allocated = NULL; 2843 } 2844 } 2845 2846 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) { 2847 assert(is_enabled(), "Object alloc event collector is not enabled"); 2848 if (_allocated == NULL) { 2849 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true); 2850 } 2851 _allocated->push(obj); 2852 } 2853 2854 // GC support. 2855 void JvmtiObjectAllocEventCollector::oops_do(OopClosure* f) { 2856 if (_allocated) { 2857 for(int i = _allocated->length() - 1; i >= 0; i--) { 2858 if (_allocated->at(i) != NULL) { 2859 f->do_oop(_allocated->adr_at(i)); 2860 } 2861 } 2862 } 2863 } 2864 2865 void JvmtiObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { 2866 // no-op if jvmti not enabled 2867 if (!JvmtiEnv::environments_might_exist()) { 2868 return; 2869 } 2870 2871 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) { 2872 JvmtiThreadState *state = jthr->jvmti_thread_state(); 2873 if (state != NULL) { 2874 JvmtiObjectAllocEventCollector *collector; 2875 collector = state->get_vm_object_alloc_event_collector(); 2876 while (collector != NULL) { 2877 collector->oops_do(f); 2878 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev(); 2879 } 2880 2881 collector = state->get_sampled_object_alloc_event_collector(); 2882 while (collector != NULL) { 2883 collector->oops_do(f); 2884 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev(); 2885 } 2886 } 2887 } 2888 } 2889 2890 2891 // Disable collection of VMObjectAlloc events 2892 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2893 // a no-op if VMObjectAlloc event is not enabled 2894 if (!JvmtiExport::should_post_vm_object_alloc()) { 2895 return; 2896 } 2897 Thread* thread = Thread::current_or_null(); 2898 if (thread != NULL && thread->is_Java_thread()) { 2899 JavaThread* current_thread = (JavaThread*)thread; 2900 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2901 if (state != NULL) { 2902 JvmtiVMObjectAllocEventCollector *collector; 2903 collector = state->get_vm_object_alloc_event_collector(); 2904 if (collector != NULL && collector->is_enabled()) { 2905 _collector = collector; 2906 _collector->set_enabled(false); 2907 } 2908 } 2909 } 2910 } 2911 2912 // Re-Enable collection of VMObjectAlloc events (if previously enabled) 2913 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2914 if (was_enabled()) { 2915 _collector->set_enabled(true); 2916 } 2917 }; 2918 2919 // Setup current thread to record vm allocated objects. 2920 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() { 2921 if (JvmtiExport::should_post_vm_object_alloc()) { 2922 _enable = true; 2923 setup_jvmti_thread_state(); 2924 _post_callback = JvmtiExport::post_vm_object_alloc; 2925 } 2926 } 2927 2928 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2929 if (_enable) { 2930 generate_call_for_allocated(); 2931 } 2932 unset_jvmti_thread_state(); 2933 } 2934 2935 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() { 2936 Thread* thread = Thread::current(); 2937 // Really only sample allocations if this is a JavaThread and not the compiler 2938 // thread. 2939 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) { 2940 return false; 2941 } 2942 2943 if (Compile_lock->owner() == thread || 2944 MultiArray_lock->owner() == thread) { 2945 return false; 2946 } 2947 return true; 2948 } 2949 2950 // Setup current thread to record sampled allocated objects. 2951 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() { 2952 if (JvmtiExport::should_post_sampled_object_alloc()) { 2953 if (!object_alloc_is_safe_to_sample()) { 2954 return; 2955 } 2956 2957 _enable = true; 2958 setup_jvmti_thread_state(); 2959 _post_callback = JvmtiExport::post_sampled_object_alloc; 2960 } 2961 } 2962 2963 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() { 2964 if (!_enable) { 2965 return; 2966 } 2967 2968 generate_call_for_allocated(); 2969 unset_jvmti_thread_state(); 2970 2971 // Unset the sampling collector as present in assertion mode only. 2972 assert(Thread::current()->is_Java_thread(), 2973 "Should always be in a Java thread"); 2974 } 2975 2976 JvmtiGCMarker::JvmtiGCMarker() { 2977 // if there aren't any JVMTI environments then nothing to do 2978 if (!JvmtiEnv::environments_might_exist()) { 2979 return; 2980 } 2981 2982 if (JvmtiExport::should_post_garbage_collection_start()) { 2983 JvmtiExport::post_garbage_collection_start(); 2984 } 2985 2986 if (SafepointSynchronize::is_at_safepoint()) { 2987 // Do clean up tasks that need to be done at a safepoint 2988 JvmtiEnvBase::check_for_periodic_clean_up(); 2989 } 2990 } 2991 2992 JvmtiGCMarker::~JvmtiGCMarker() { 2993 // if there aren't any JVMTI environments then nothing to do 2994 if (!JvmtiEnv::environments_might_exist()) { 2995 return; 2996 } 2997 2998 // JVMTI notify gc finish 2999 if (JvmtiExport::should_post_garbage_collection_finish()) { 3000 JvmtiExport::post_garbage_collection_finish(); 3001 } 3002 }