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