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