1 /* 2 * Copyright (c) 2003, 2019, 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/javaClasses.inline.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "code/nmethod.hpp" 29 #include "code/pcDesc.hpp" 30 #include "code/scopeDesc.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "jvmtifiles/jvmtiEnv.hpp" 33 #include "logging/log.hpp" 34 #include "logging/logStream.hpp" 35 #include "memory/allocation.inline.hpp" 36 #include "memory/resourceArea.hpp" 37 #include "oops/objArrayKlass.hpp" 38 #include "oops/objArrayOop.hpp" 39 #include "oops/oop.inline.hpp" 40 #include "prims/jvmtiCodeBlobEvents.hpp" 41 #include "prims/jvmtiEventController.hpp" 42 #include "prims/jvmtiEventController.inline.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "prims/jvmtiImpl.hpp" 45 #include "prims/jvmtiManageCapabilities.hpp" 46 #include "prims/jvmtiRawMonitor.hpp" 47 #include "prims/jvmtiRedefineClasses.hpp" 48 #include "prims/jvmtiTagMap.hpp" 49 #include "prims/jvmtiThreadState.inline.hpp" 50 #include "runtime/arguments.hpp" 51 #include "runtime/fieldDescriptor.inline.hpp" 52 #include "runtime/handles.inline.hpp" 53 #include "runtime/interfaceSupport.inline.hpp" 54 #include "runtime/javaCalls.hpp" 55 #include "runtime/jniHandles.inline.hpp" 56 #include "runtime/objectMonitor.hpp" 57 #include "runtime/objectMonitor.inline.hpp" 58 #include "runtime/os.inline.hpp" 59 #include "runtime/safepointVerifiers.hpp" 60 #include "runtime/thread.inline.hpp" 61 #include "runtime/threadSMR.hpp" 62 #include "runtime/vframe.inline.hpp" 63 #include "utilities/macros.hpp" 64 65 #ifdef JVMTI_TRACE 66 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 67 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 68 #else 69 #define EVT_TRIG_TRACE(evt,out) 70 #define EVT_TRACE(evt,out) 71 #endif 72 73 /////////////////////////////////////////////////////////////// 74 // 75 // JvmtiEventTransition 76 // 77 // TO DO -- 78 // more handle purging 79 80 // Use this for JavaThreads and state is _thread_in_vm. 81 class JvmtiJavaThreadEventTransition : StackObj { 82 private: 83 ResourceMark _rm; 84 ThreadToNativeFromVM _transition; 85 HandleMark _hm; 86 87 public: 88 JvmtiJavaThreadEventTransition(JavaThread *thread) : 89 _rm(), 90 _transition(thread), 91 _hm(thread) {}; 92 }; 93 94 // For JavaThreads which are not in _thread_in_vm state 95 // and other system threads use this. 96 class JvmtiThreadEventTransition : StackObj { 97 private: 98 ResourceMark _rm; 99 HandleMark _hm; 100 JavaThreadState _saved_state; 101 JavaThread *_jthread; 102 103 public: 104 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { 105 if (thread->is_Java_thread()) { 106 _jthread = (JavaThread *)thread; 107 _saved_state = _jthread->thread_state(); 108 if (_saved_state == _thread_in_Java) { 109 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 110 } else { 111 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 112 } 113 } else { 114 _jthread = NULL; 115 } 116 } 117 118 ~JvmtiThreadEventTransition() { 119 if (_jthread != NULL) 120 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 121 } 122 }; 123 124 125 /////////////////////////////////////////////////////////////// 126 // 127 // JvmtiEventMark 128 // 129 130 class JvmtiEventMark : public StackObj { 131 private: 132 JavaThread *_thread; 133 JNIEnv* _jni_env; 134 JvmtiThreadState::ExceptionState _saved_exception_state; 135 #if 0 136 JNIHandleBlock* _hblock; 137 #endif 138 139 public: 140 JvmtiEventMark(JavaThread *thread) : _thread(thread), 141 _jni_env(thread->jni_environment()), 142 _saved_exception_state(JvmtiThreadState::ES_CLEARED) { 143 #if 0 144 _hblock = thread->active_handles(); 145 _hblock->clear_thoroughly(); // so we can be safe 146 #else 147 // we want to use the code above - but that needs the JNIHandle changes - later... 148 // for now, steal JNI push local frame code 149 JvmtiThreadState *state = thread->jvmti_thread_state(); 150 // we are before an event. 151 // Save current jvmti thread exception state. 152 if (state != NULL) { 153 _saved_exception_state = state->get_exception_state(); 154 } 155 156 JNIHandleBlock* old_handles = thread->active_handles(); 157 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 158 assert(new_handles != NULL, "should not be NULL"); 159 new_handles->set_pop_frame_link(old_handles); 160 thread->set_active_handles(new_handles); 161 #endif 162 assert(thread == JavaThread::current(), "thread must be current!"); 163 thread->frame_anchor()->make_walkable(thread); 164 }; 165 166 ~JvmtiEventMark() { 167 #if 0 168 _hblock->clear(); // for consistency with future correct behavior 169 #else 170 // we want to use the code above - but that needs the JNIHandle changes - later... 171 // for now, steal JNI pop local frame code 172 JNIHandleBlock* old_handles = _thread->active_handles(); 173 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 174 assert(new_handles != NULL, "should not be NULL"); 175 _thread->set_active_handles(new_handles); 176 // Note that we set the pop_frame_link to NULL explicitly, otherwise 177 // the release_block call will release the blocks. 178 old_handles->set_pop_frame_link(NULL); 179 JNIHandleBlock::release_block(old_handles, _thread); // may block 180 #endif 181 182 JvmtiThreadState* state = _thread->jvmti_thread_state(); 183 // we are continuing after an event. 184 if (state != NULL) { 185 // Restore the jvmti thread exception state. 186 state->restore_exception_state(_saved_exception_state); 187 } 188 } 189 190 #if 0 191 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 192 #else 193 // we want to use the code above - but that needs the JNIHandle changes - later... 194 // for now, use regular make_local 195 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 196 #endif 197 198 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); } 199 200 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); } 201 202 JNIEnv* jni_env() { return _jni_env; } 203 }; 204 205 class JvmtiThreadEventMark : public JvmtiEventMark { 206 private: 207 jthread _jt; 208 209 public: 210 JvmtiThreadEventMark(JavaThread *thread) : 211 JvmtiEventMark(thread) { 212 _jt = (jthread)(to_jobject(thread->threadObj())); 213 }; 214 jthread jni_thread() { return _jt; } 215 }; 216 217 class JvmtiClassEventMark : public JvmtiThreadEventMark { 218 private: 219 jclass _jc; 220 221 public: 222 JvmtiClassEventMark(JavaThread *thread, Klass* klass) : 223 JvmtiThreadEventMark(thread) { 224 _jc = to_jclass(klass); 225 }; 226 jclass jni_class() { return _jc; } 227 }; 228 229 class JvmtiMethodEventMark : public JvmtiThreadEventMark { 230 private: 231 jmethodID _mid; 232 233 public: 234 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) : 235 JvmtiThreadEventMark(thread), 236 _mid(to_jmethodID(method)) {}; 237 jmethodID jni_methodID() { return _mid; } 238 }; 239 240 class JvmtiLocationEventMark : public JvmtiMethodEventMark { 241 private: 242 jlocation _loc; 243 244 public: 245 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) : 246 JvmtiMethodEventMark(thread, method), 247 _loc(location - method->code_base()) {}; 248 jlocation location() { return _loc; } 249 }; 250 251 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 252 private: 253 jobject _exc; 254 255 public: 256 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) : 257 JvmtiLocationEventMark(thread, method, location), 258 _exc(to_jobject(exception())) {}; 259 jobject exception() { return _exc; } 260 }; 261 262 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 263 private: 264 const char *_class_name; 265 jobject _jloader; 266 jobject _protection_domain; 267 jclass _class_being_redefined; 268 269 public: 270 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 271 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) { 272 _class_name = name != NULL? name->as_utf8() : NULL; 273 _jloader = (jobject)to_jobject(class_loader()); 274 _protection_domain = (jobject)to_jobject(prot_domain()); 275 if (class_being_redefined == NULL) { 276 _class_being_redefined = NULL; 277 } else { 278 _class_being_redefined = (jclass)to_jclass(class_being_redefined); 279 } 280 }; 281 const char *class_name() { 282 return _class_name; 283 } 284 jobject jloader() { 285 return _jloader; 286 } 287 jobject protection_domain() { 288 return _protection_domain; 289 } 290 jclass class_being_redefined() { 291 return _class_being_redefined; 292 } 293 }; 294 295 ////////////////////////////////////////////////////////////////////////////// 296 297 int JvmtiExport::_field_access_count = 0; 298 int JvmtiExport::_field_modification_count = 0; 299 300 bool JvmtiExport::_can_access_local_variables = false; 301 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 302 bool JvmtiExport::_can_modify_any_class = false; 303 bool JvmtiExport::_can_walk_any_space = false; 304 305 bool JvmtiExport::_has_redefined_a_class = false; 306 bool JvmtiExport::_all_dependencies_are_recorded = false; 307 308 // 309 // field access management 310 // 311 312 // interpreter generator needs the address of the counter 313 address JvmtiExport::get_field_access_count_addr() { 314 // We don't grab a lock because we don't want to 315 // serialize field access between all threads. This means that a 316 // thread on another processor can see the wrong count value and 317 // may either miss making a needed call into post_field_access() 318 // or will make an unneeded call into post_field_access(). We pay 319 // this price to avoid slowing down the VM when we aren't watching 320 // field accesses. 321 // Other access/mutation safe by virtue of being in VM state. 322 return (address)(&_field_access_count); 323 } 324 325 // 326 // field modification management 327 // 328 329 // interpreter generator needs the address of the counter 330 address JvmtiExport::get_field_modification_count_addr() { 331 // We don't grab a lock because we don't 332 // want to serialize field modification between all threads. This 333 // means that a thread on another processor can see the wrong 334 // count value and may either miss making a needed call into 335 // post_field_modification() or will make an unneeded call into 336 // post_field_modification(). We pay this price to avoid slowing 337 // down the VM when we aren't watching field modifications. 338 // Other access/mutation safe by virtue of being in VM state. 339 return (address)(&_field_modification_count); 340 } 341 342 343 /////////////////////////////////////////////////////////////// 344 // Functions needed by java.lang.instrument for starting up javaagent. 345 /////////////////////////////////////////////////////////////// 346 347 jint 348 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 349 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 350 // has already been validated in JNI GetEnv(). 351 int major, minor, micro; 352 353 // micro version doesn't matter here (yet?) 354 decode_version_values(version, &major, &minor, µ); 355 switch (major) { 356 case 1: 357 switch (minor) { 358 case 0: // version 1.0.<micro> is recognized 359 case 1: // version 1.1.<micro> is recognized 360 case 2: // version 1.2.<micro> is recognized 361 break; 362 363 default: 364 return JNI_EVERSION; // unsupported minor version number 365 } 366 break; 367 case 9: 368 switch (minor) { 369 case 0: // version 9.0.<micro> is recognized 370 break; 371 default: 372 return JNI_EVERSION; // unsupported minor version number 373 } 374 break; 375 case 11: 376 switch (minor) { 377 case 0: // version 11.0.<micro> is recognized 378 break; 379 default: 380 return JNI_EVERSION; // unsupported minor version number 381 } 382 break; 383 default: 384 return JNI_EVERSION; // unsupported major version number 385 } 386 387 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 388 JavaThread* current_thread = JavaThread::current(); 389 // transition code: native to VM 390 ThreadInVMfromNative __tiv(current_thread); 391 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 392 debug_only(VMNativeEntryWrapper __vew;) 393 394 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 395 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 396 return JNI_OK; 397 398 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 399 // not live, no thread to transition 400 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 401 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 402 return JNI_OK; 403 404 } else { 405 // Called at the wrong time 406 *penv = NULL; 407 return JNI_EDETACHED; 408 } 409 } 410 411 void 412 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) { 413 if (!Universe::is_module_initialized()) { 414 return; // extra safety 415 } 416 assert(!h_module.is_null(), "module should always be set"); 417 418 // Invoke the transformedByAgent method 419 JavaValue result(T_VOID); 420 JavaCalls::call_static(&result, 421 SystemDictionary::module_Modules_klass(), 422 vmSymbols::transformedByAgent_name(), 423 vmSymbols::transformedByAgent_signature(), 424 h_module, 425 THREAD); 426 427 if (HAS_PENDING_EXCEPTION) { 428 LogTarget(Trace, jvmti) log; 429 LogStream log_stream(log); 430 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 431 log_stream.cr(); 432 CLEAR_PENDING_EXCEPTION; 433 return; 434 } 435 } 436 437 jvmtiError 438 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) { 439 if (!Universe::is_module_initialized()) { 440 return JVMTI_ERROR_NONE; // extra safety 441 } 442 assert(!module.is_null(), "module should always be set"); 443 assert(!to_module.is_null(), "to_module should always be set"); 444 445 // Invoke the addReads method 446 JavaValue result(T_VOID); 447 JavaCalls::call_static(&result, 448 SystemDictionary::module_Modules_klass(), 449 vmSymbols::addReads_name(), 450 vmSymbols::addReads_signature(), 451 module, 452 to_module, 453 THREAD); 454 455 if (HAS_PENDING_EXCEPTION) { 456 LogTarget(Trace, jvmti) log; 457 LogStream log_stream(log); 458 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 459 log_stream.cr(); 460 CLEAR_PENDING_EXCEPTION; 461 return JVMTI_ERROR_INTERNAL; 462 } 463 return JVMTI_ERROR_NONE; 464 } 465 466 jvmtiError 467 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 468 if (!Universe::is_module_initialized()) { 469 return JVMTI_ERROR_NONE; // extra safety 470 } 471 assert(!module.is_null(), "module should always be set"); 472 assert(!to_module.is_null(), "to_module should always be set"); 473 assert(!pkg_name.is_null(), "pkg_name should always be set"); 474 475 // Invoke the addExports method 476 JavaValue result(T_VOID); 477 JavaCalls::call_static(&result, 478 SystemDictionary::module_Modules_klass(), 479 vmSymbols::addExports_name(), 480 vmSymbols::addExports_signature(), 481 module, 482 pkg_name, 483 to_module, 484 THREAD); 485 486 if (HAS_PENDING_EXCEPTION) { 487 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 488 LogTarget(Trace, jvmti) log; 489 LogStream log_stream(log); 490 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 491 log_stream.cr(); 492 CLEAR_PENDING_EXCEPTION; 493 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 494 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 495 } 496 return JVMTI_ERROR_INTERNAL; 497 } 498 return JVMTI_ERROR_NONE; 499 } 500 501 jvmtiError 502 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 503 if (!Universe::is_module_initialized()) { 504 return JVMTI_ERROR_NONE; // extra safety 505 } 506 assert(!module.is_null(), "module should always be set"); 507 assert(!to_module.is_null(), "to_module should always be set"); 508 assert(!pkg_name.is_null(), "pkg_name should always be set"); 509 510 // Invoke the addOpens method 511 JavaValue result(T_VOID); 512 JavaCalls::call_static(&result, 513 SystemDictionary::module_Modules_klass(), 514 vmSymbols::addOpens_name(), 515 vmSymbols::addExports_signature(), 516 module, 517 pkg_name, 518 to_module, 519 THREAD); 520 521 if (HAS_PENDING_EXCEPTION) { 522 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 523 LogTarget(Trace, jvmti) log; 524 LogStream log_stream(log); 525 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 526 log_stream.cr(); 527 CLEAR_PENDING_EXCEPTION; 528 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 529 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 530 } 531 return JVMTI_ERROR_INTERNAL; 532 } 533 return JVMTI_ERROR_NONE; 534 } 535 536 jvmtiError 537 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) { 538 if (!Universe::is_module_initialized()) { 539 return JVMTI_ERROR_NONE; // extra safety 540 } 541 assert(!module.is_null(), "module should always be set"); 542 assert(!service.is_null(), "service should always be set"); 543 544 // Invoke the addUses method 545 JavaValue result(T_VOID); 546 JavaCalls::call_static(&result, 547 SystemDictionary::module_Modules_klass(), 548 vmSymbols::addUses_name(), 549 vmSymbols::addUses_signature(), 550 module, 551 service, 552 THREAD); 553 554 if (HAS_PENDING_EXCEPTION) { 555 LogTarget(Trace, jvmti) log; 556 LogStream log_stream(log); 557 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 558 log_stream.cr(); 559 CLEAR_PENDING_EXCEPTION; 560 return JVMTI_ERROR_INTERNAL; 561 } 562 return JVMTI_ERROR_NONE; 563 } 564 565 jvmtiError 566 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) { 567 if (!Universe::is_module_initialized()) { 568 return JVMTI_ERROR_NONE; // extra safety 569 } 570 assert(!module.is_null(), "module should always be set"); 571 assert(!service.is_null(), "service should always be set"); 572 assert(!impl_class.is_null(), "impl_class should always be set"); 573 574 // Invoke the addProvides method 575 JavaValue result(T_VOID); 576 JavaCalls::call_static(&result, 577 SystemDictionary::module_Modules_klass(), 578 vmSymbols::addProvides_name(), 579 vmSymbols::addProvides_signature(), 580 module, 581 service, 582 impl_class, 583 THREAD); 584 585 if (HAS_PENDING_EXCEPTION) { 586 LogTarget(Trace, jvmti) log; 587 LogStream log_stream(log); 588 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 589 log_stream.cr(); 590 CLEAR_PENDING_EXCEPTION; 591 return JVMTI_ERROR_INTERNAL; 592 } 593 return JVMTI_ERROR_NONE; 594 } 595 596 void 597 JvmtiExport::decode_version_values(jint version, int * major, int * minor, 598 int * micro) { 599 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 600 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 601 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 602 } 603 604 void JvmtiExport::enter_primordial_phase() { 605 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 606 } 607 608 void JvmtiExport::enter_early_start_phase() { 609 set_early_vmstart_recorded(true); 610 } 611 612 void JvmtiExport::enter_start_phase() { 613 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 614 } 615 616 void JvmtiExport::enter_onload_phase() { 617 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 618 } 619 620 void JvmtiExport::enter_live_phase() { 621 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 622 } 623 624 // 625 // JVMTI events that the VM posts to the debugger and also startup agent 626 // and call the agent's premain() for java.lang.instrument. 627 // 628 629 void JvmtiExport::post_early_vm_start() { 630 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" )); 631 632 // can now enable some events 633 JvmtiEventController::vm_start(); 634 635 JvmtiEnvIterator it; 636 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 637 // Only early vmstart envs post early VMStart event 638 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 639 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" )); 640 JavaThread *thread = JavaThread::current(); 641 JvmtiThreadEventMark jem(thread); 642 JvmtiJavaThreadEventTransition jet(thread); 643 jvmtiEventVMStart callback = env->callbacks()->VMStart; 644 if (callback != NULL) { 645 (*callback)(env->jvmti_external(), jem.jni_env()); 646 } 647 } 648 } 649 } 650 651 void JvmtiExport::post_vm_start() { 652 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" )); 653 654 // can now enable some events 655 JvmtiEventController::vm_start(); 656 657 JvmtiEnvIterator it; 658 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 659 // Early vmstart envs do not post normal VMStart event 660 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 661 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" )); 662 663 JavaThread *thread = JavaThread::current(); 664 JvmtiThreadEventMark jem(thread); 665 JvmtiJavaThreadEventTransition jet(thread); 666 jvmtiEventVMStart callback = env->callbacks()->VMStart; 667 if (callback != NULL) { 668 (*callback)(env->jvmti_external(), jem.jni_env()); 669 } 670 } 671 } 672 } 673 674 675 void JvmtiExport::post_vm_initialized() { 676 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" )); 677 678 // can now enable events 679 JvmtiEventController::vm_init(); 680 681 JvmtiEnvIterator it; 682 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 683 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 684 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" )); 685 686 JavaThread *thread = JavaThread::current(); 687 JvmtiThreadEventMark jem(thread); 688 JvmtiJavaThreadEventTransition jet(thread); 689 jvmtiEventVMInit callback = env->callbacks()->VMInit; 690 if (callback != NULL) { 691 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 692 } 693 } 694 } 695 } 696 697 698 void JvmtiExport::post_vm_death() { 699 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" )); 700 701 JvmtiEnvIterator it; 702 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 703 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 704 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" )); 705 706 JavaThread *thread = JavaThread::current(); 707 JvmtiEventMark jem(thread); 708 JvmtiJavaThreadEventTransition jet(thread); 709 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 710 if (callback != NULL) { 711 (*callback)(env->jvmti_external(), jem.jni_env()); 712 } 713 } 714 } 715 716 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 717 JvmtiEventController::vm_death(); 718 } 719 720 char** 721 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 722 // Have to grab JVMTI thread state lock to be sure environment doesn't 723 // go away while we iterate them. No locks during VM bring-up. 724 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 725 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 726 } else { 727 MutexLocker mu(JvmtiThreadState_lock); 728 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 729 } 730 } 731 732 // Convert an external thread reference to a JavaThread found on the 733 // specified ThreadsList. The ThreadsListHandle in the caller "protects" 734 // the returned JavaThread *. 735 // 736 // If thread_oop_p is not NULL, then the caller wants to use the oop 737 // after this call so the oop is returned. On success, *jt_pp is set 738 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned. 739 // On error, returns various JVMTI_ERROR_* values. 740 // 741 jvmtiError 742 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list, 743 jthread thread, 744 JavaThread ** jt_pp, 745 oop * thread_oop_p) { 746 assert(t_list != NULL, "must have a ThreadsList"); 747 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 748 // thread_oop_p is optional so no assert() 749 750 oop thread_oop = JNIHandles::resolve_external_guard(thread); 751 if (thread_oop == NULL) { 752 // NULL jthread, GC'ed jthread or a bad JNI handle. 753 return JVMTI_ERROR_INVALID_THREAD; 754 } 755 // Looks like an oop at this point. 756 757 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 758 // The oop is not a java.lang.Thread. 759 return JVMTI_ERROR_INVALID_THREAD; 760 } 761 // Looks like a java.lang.Thread oop at this point. 762 763 if (thread_oop_p != NULL) { 764 // Return the oop to the caller; the caller may still want 765 // the oop even if this function returns an error. 766 *thread_oop_p = thread_oop; 767 } 768 769 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 770 if (java_thread == NULL) { 771 // The java.lang.Thread does not contain a JavaThread * so it has 772 // not yet run or it has died. 773 return JVMTI_ERROR_THREAD_NOT_ALIVE; 774 } 775 // Looks like a live JavaThread at this point. 776 777 // We do not check the EnableThreadSMRExtraValidityChecks option 778 // for this includes() call because JVM/TI's spec is tighter. 779 if (!t_list->includes(java_thread)) { 780 // Not on the JavaThreads list so it is not alive. 781 return JVMTI_ERROR_THREAD_NOT_ALIVE; 782 } 783 784 // Return a live JavaThread that is "protected" by the 785 // ThreadsListHandle in the caller. 786 *jt_pp = java_thread; 787 788 return JVMTI_ERROR_NONE; 789 } 790 791 // Convert an oop to a JavaThread found on the specified ThreadsList. 792 // The ThreadsListHandle in the caller "protects" the returned 793 // JavaThread *. 794 // 795 // On success, *jt_pp is set to the converted JavaThread * and 796 // JVMTI_ERROR_NONE is returned. On error, returns various 797 // JVMTI_ERROR_* values. 798 // 799 jvmtiError 800 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop, 801 JavaThread ** jt_pp) { 802 assert(t_list != NULL, "must have a ThreadsList"); 803 assert(thread_oop != NULL, "must have an oop"); 804 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 805 806 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 807 // The oop is not a java.lang.Thread. 808 return JVMTI_ERROR_INVALID_THREAD; 809 } 810 // Looks like a java.lang.Thread oop at this point. 811 812 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 813 if (java_thread == NULL) { 814 // The java.lang.Thread does not contain a JavaThread * so it has 815 // not yet run or it has died. 816 return JVMTI_ERROR_THREAD_NOT_ALIVE; 817 } 818 // Looks like a live JavaThread at this point. 819 820 // We do not check the EnableThreadSMRExtraValidityChecks option 821 // for this includes() call because JVM/TI's spec is tighter. 822 if (!t_list->includes(java_thread)) { 823 // Not on the JavaThreads list so it is not alive. 824 return JVMTI_ERROR_THREAD_NOT_ALIVE; 825 } 826 827 // Return a live JavaThread that is "protected" by the 828 // ThreadsListHandle in the caller. 829 *jt_pp = java_thread; 830 831 return JVMTI_ERROR_NONE; 832 } 833 834 class JvmtiClassFileLoadHookPoster : public StackObj { 835 private: 836 Symbol* _h_name; 837 Handle _class_loader; 838 Handle _h_protection_domain; 839 unsigned char ** _data_ptr; 840 unsigned char ** _end_ptr; 841 JavaThread * _thread; 842 jint _curr_len; 843 unsigned char * _curr_data; 844 JvmtiEnv * _curr_env; 845 JvmtiCachedClassFileData ** _cached_class_file_ptr; 846 JvmtiThreadState * _state; 847 Klass* _class_being_redefined; 848 JvmtiClassLoadKind _load_kind; 849 bool _has_been_modified; 850 851 public: 852 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 853 Handle h_protection_domain, 854 unsigned char **data_ptr, unsigned char **end_ptr, 855 JvmtiCachedClassFileData **cache_ptr) { 856 _h_name = h_name; 857 _class_loader = class_loader; 858 _h_protection_domain = h_protection_domain; 859 _data_ptr = data_ptr; 860 _end_ptr = end_ptr; 861 _thread = JavaThread::current(); 862 _curr_len = *end_ptr - *data_ptr; 863 _curr_data = *data_ptr; 864 _curr_env = NULL; 865 _cached_class_file_ptr = cache_ptr; 866 _has_been_modified = false; 867 868 _state = _thread->jvmti_thread_state(); 869 if (_state != NULL) { 870 _class_being_redefined = _state->get_class_being_redefined(); 871 _load_kind = _state->get_class_load_kind(); 872 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined; 873 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) { 874 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module(); 875 assert(module_entry != NULL, "module_entry should always be set"); 876 if (module_entry->is_named() && 877 module_entry->module() != NULL && 878 !module_entry->has_default_read_edges()) { 879 if (!module_entry->set_has_default_read_edges()) { 880 // We won a potential race. 881 // Add read edges to the unnamed modules of the bootstrap and app class loaders 882 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module 883 JvmtiExport::add_default_read_edges(class_module, _thread); 884 } 885 } 886 } 887 // Clear class_being_redefined flag here. The action 888 // from agent handler could generate a new class file load 889 // hook event and if it is not cleared the new event generated 890 // from regular class file load could have this stale redefined 891 // class handle info. 892 _state->clear_class_being_redefined(); 893 } else { 894 // redefine and retransform will always set the thread state 895 _class_being_redefined = NULL; 896 _load_kind = jvmti_class_load_kind_load; 897 } 898 } 899 900 void post() { 901 post_all_envs(); 902 copy_modified_data(); 903 } 904 905 bool has_been_modified() { return _has_been_modified; } 906 907 private: 908 void post_all_envs() { 909 if (_load_kind != jvmti_class_load_kind_retransform) { 910 // for class load and redefine, 911 // call the non-retransformable agents 912 JvmtiEnvIterator it; 913 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 914 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 915 // non-retransformable agents cannot retransform back, 916 // so no need to cache the original class file bytes 917 post_to_env(env, false); 918 } 919 } 920 } 921 JvmtiEnvIterator it; 922 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 923 // retransformable agents get all events 924 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 925 // retransformable agents need to cache the original class file 926 // bytes if changes are made via the ClassFileLoadHook 927 post_to_env(env, true); 928 } 929 } 930 } 931 932 void post_to_env(JvmtiEnv* env, bool caching_needed) { 933 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) { 934 return; 935 } 936 unsigned char *new_data = NULL; 937 jint new_len = 0; 938 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 939 _h_protection_domain, 940 _class_being_redefined); 941 JvmtiJavaThreadEventTransition jet(_thread); 942 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 943 if (callback != NULL) { 944 (*callback)(env->jvmti_external(), jem.jni_env(), 945 jem.class_being_redefined(), 946 jem.jloader(), jem.class_name(), 947 jem.protection_domain(), 948 _curr_len, _curr_data, 949 &new_len, &new_data); 950 } 951 if (new_data != NULL) { 952 // this agent has modified class data. 953 _has_been_modified = true; 954 if (caching_needed && *_cached_class_file_ptr == NULL) { 955 // data has been changed by the new retransformable agent 956 // and it hasn't already been cached, cache it 957 JvmtiCachedClassFileData *p; 958 p = (JvmtiCachedClassFileData *)os::malloc( 959 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal); 960 if (p == NULL) { 961 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len, 962 OOM_MALLOC_ERROR, 963 "unable to allocate cached copy of original class bytes"); 964 } 965 p->length = _curr_len; 966 memcpy(p->data, _curr_data, _curr_len); 967 *_cached_class_file_ptr = p; 968 } 969 970 if (_curr_data != *_data_ptr) { 971 // curr_data is previous agent modified class data. 972 // And this has been changed by the new agent so 973 // we can delete it now. 974 _curr_env->Deallocate(_curr_data); 975 } 976 977 // Class file data has changed by the current agent. 978 _curr_data = new_data; 979 _curr_len = new_len; 980 // Save the current agent env we need this to deallocate the 981 // memory allocated by this agent. 982 _curr_env = env; 983 } 984 } 985 986 void copy_modified_data() { 987 // if one of the agent has modified class file data. 988 // Copy modified class data to new resources array. 989 if (_curr_data != *_data_ptr) { 990 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 991 memcpy(*_data_ptr, _curr_data, _curr_len); 992 *_end_ptr = *_data_ptr + _curr_len; 993 _curr_env->Deallocate(_curr_data); 994 } 995 } 996 }; 997 998 bool JvmtiExport::is_early_phase() { 999 return JvmtiEnvBase::get_phase() <= JVMTI_PHASE_PRIMORDIAL; 1000 } 1001 1002 bool JvmtiExport::has_early_class_hook_env() { 1003 JvmtiEnvIterator it; 1004 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1005 if (env->early_class_hook_env()) { 1006 return true; 1007 } 1008 } 1009 return false; 1010 } 1011 1012 bool JvmtiExport::_should_post_class_file_load_hook = false; 1013 1014 // this entry is for class file load hook on class load, redefine and retransform 1015 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name, 1016 Handle class_loader, 1017 Handle h_protection_domain, 1018 unsigned char **data_ptr, 1019 unsigned char **end_ptr, 1020 JvmtiCachedClassFileData **cache_ptr) { 1021 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1022 return false; 1023 } 1024 1025 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 1026 h_protection_domain, 1027 data_ptr, end_ptr, 1028 cache_ptr); 1029 poster.post(); 1030 return poster.has_been_modified(); 1031 } 1032 1033 void JvmtiExport::report_unsupported(bool on) { 1034 // If any JVMTI service is turned on, we need to exit before native code 1035 // tries to access nonexistant services. 1036 if (on) { 1037 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 1038 } 1039 } 1040 1041 1042 static inline Klass* oop_to_klass(oop obj) { 1043 Klass* k = obj->klass(); 1044 1045 // if the object is a java.lang.Class then return the java mirror 1046 if (k == SystemDictionary::Class_klass()) { 1047 if (!java_lang_Class::is_primitive(obj)) { 1048 k = java_lang_Class::as_Klass(obj); 1049 assert(k != NULL, "class for non-primitive mirror must exist"); 1050 } 1051 } 1052 return k; 1053 } 1054 1055 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark { 1056 private: 1057 jobject _jobj; 1058 jlong _size; 1059 public: 1060 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) { 1061 _jobj = (jobject)to_jobject(obj); 1062 _size = Universe::heap()->obj_size(obj) * wordSize; 1063 }; 1064 jobject jni_jobject() { return _jobj; } 1065 jlong size() { return _size; } 1066 }; 1067 1068 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 1069 private: 1070 jint _code_size; 1071 const void *_code_data; 1072 jint _map_length; 1073 jvmtiAddrLocationMap *_map; 1074 const void *_compile_info; 1075 public: 1076 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 1077 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 1078 _code_data = nm->insts_begin(); 1079 _code_size = nm->insts_size(); 1080 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 1081 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 1082 } 1083 ~JvmtiCompiledMethodLoadEventMark() { 1084 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); 1085 } 1086 1087 jint code_size() { return _code_size; } 1088 const void *code_data() { return _code_data; } 1089 jint map_length() { return _map_length; } 1090 const jvmtiAddrLocationMap* map() { return _map; } 1091 const void *compile_info() { return _compile_info; } 1092 }; 1093 1094 1095 1096 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 1097 private: 1098 jobject _jobj; 1099 public: 1100 JvmtiMonitorEventMark(JavaThread *thread, oop object) 1101 : JvmtiThreadEventMark(thread){ 1102 _jobj = to_jobject(object); 1103 } 1104 jobject jni_object() { return _jobj; } 1105 }; 1106 1107 /////////////////////////////////////////////////////////////// 1108 // 1109 // pending CompiledMethodUnload support 1110 // 1111 1112 void JvmtiExport::post_compiled_method_unload( 1113 jmethodID method, const void *code_begin) { 1114 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1115 return; 1116 } 1117 JavaThread* thread = JavaThread::current(); 1118 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1119 ("[%s] method compile unload event triggered", 1120 JvmtiTrace::safe_get_thread_name(thread))); 1121 1122 // post the event for each environment that has this event enabled. 1123 JvmtiEnvIterator it; 1124 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1125 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 1126 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1127 continue; 1128 } 1129 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1130 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT, 1131 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 1132 1133 ResourceMark rm(thread); 1134 1135 JvmtiEventMark jem(thread); 1136 JvmtiJavaThreadEventTransition jet(thread); 1137 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 1138 if (callback != NULL) { 1139 (*callback)(env->jvmti_external(), method, code_begin); 1140 } 1141 } 1142 } 1143 } 1144 1145 /////////////////////////////////////////////////////////////// 1146 // 1147 // JvmtiExport 1148 // 1149 1150 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) { 1151 HandleMark hm(thread); 1152 methodHandle mh(thread, method); 1153 1154 JvmtiThreadState *state = thread->jvmti_thread_state(); 1155 if (state == NULL) { 1156 return; 1157 } 1158 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered", 1159 JvmtiTrace::safe_get_thread_name(thread))); 1160 JvmtiEnvThreadStateIterator it(state); 1161 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1162 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 1163 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 1164 ThreadState old_os_state = thread->osthread()->get_state(); 1165 thread->osthread()->set_state(BREAKPOINTED); 1166 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT, 1167 JvmtiTrace::safe_get_thread_name(thread), 1168 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1169 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1170 location - mh()->code_base() )); 1171 1172 JvmtiEnv *env = ets->get_env(); 1173 JvmtiLocationEventMark jem(thread, mh, location); 1174 JvmtiJavaThreadEventTransition jet(thread); 1175 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 1176 if (callback != NULL) { 1177 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1178 jem.jni_methodID(), jem.location()); 1179 } 1180 1181 ets->set_breakpoint_posted(); 1182 thread->osthread()->set_state(old_os_state); 1183 } 1184 } 1185 } 1186 1187 ////////////////////////////////////////////////////////////////////////////// 1188 1189 bool JvmtiExport::_can_get_source_debug_extension = false; 1190 bool JvmtiExport::_can_maintain_original_method_order = false; 1191 bool JvmtiExport::_can_post_interpreter_events = false; 1192 bool JvmtiExport::_can_post_on_exceptions = false; 1193 bool JvmtiExport::_can_post_breakpoint = false; 1194 bool JvmtiExport::_can_post_field_access = false; 1195 bool JvmtiExport::_can_post_field_modification = false; 1196 bool JvmtiExport::_can_post_method_entry = false; 1197 bool JvmtiExport::_can_post_method_exit = false; 1198 bool JvmtiExport::_can_pop_frame = false; 1199 bool JvmtiExport::_can_force_early_return = false; 1200 1201 bool JvmtiExport::_early_vmstart_recorded = false; 1202 1203 bool JvmtiExport::_should_post_single_step = false; 1204 bool JvmtiExport::_should_post_field_access = false; 1205 bool JvmtiExport::_should_post_field_modification = false; 1206 bool JvmtiExport::_should_post_class_load = false; 1207 bool JvmtiExport::_should_post_class_prepare = false; 1208 bool JvmtiExport::_should_post_class_unload = false; 1209 bool JvmtiExport::_should_post_thread_life = false; 1210 bool JvmtiExport::_should_clean_up_heap_objects = false; 1211 bool JvmtiExport::_should_post_native_method_bind = false; 1212 bool JvmtiExport::_should_post_dynamic_code_generated = false; 1213 bool JvmtiExport::_should_post_data_dump = false; 1214 bool JvmtiExport::_should_post_compiled_method_load = false; 1215 bool JvmtiExport::_should_post_compiled_method_unload = false; 1216 bool JvmtiExport::_should_post_monitor_contended_enter = false; 1217 bool JvmtiExport::_should_post_monitor_contended_entered = false; 1218 bool JvmtiExport::_should_post_monitor_wait = false; 1219 bool JvmtiExport::_should_post_monitor_waited = false; 1220 bool JvmtiExport::_should_post_garbage_collection_start = false; 1221 bool JvmtiExport::_should_post_garbage_collection_finish = false; 1222 bool JvmtiExport::_should_post_object_free = false; 1223 bool JvmtiExport::_should_post_resource_exhausted = false; 1224 bool JvmtiExport::_should_post_vm_object_alloc = false; 1225 bool JvmtiExport::_should_post_sampled_object_alloc = false; 1226 bool JvmtiExport::_should_post_on_exceptions = false; 1227 1228 //////////////////////////////////////////////////////////////////////////////////////////////// 1229 1230 1231 // 1232 // JVMTI single step management 1233 // 1234 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) { 1235 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 1236 1237 HandleMark hm(thread); 1238 methodHandle mh(thread, method); 1239 1240 // update information about current location and post a step event 1241 JvmtiThreadState *state = thread->jvmti_thread_state(); 1242 if (state == NULL) { 1243 return; 1244 } 1245 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered", 1246 JvmtiTrace::safe_get_thread_name(thread))); 1247 if (!state->hide_single_stepping()) { 1248 if (state->is_pending_step_for_popframe()) { 1249 state->process_pending_step_for_popframe(); 1250 } 1251 if (state->is_pending_step_for_earlyret()) { 1252 state->process_pending_step_for_earlyret(); 1253 } 1254 JvmtiExport::post_single_step(thread, mh(), location); 1255 } 1256 } 1257 1258 1259 void JvmtiExport::expose_single_stepping(JavaThread *thread) { 1260 JvmtiThreadState *state = thread->jvmti_thread_state(); 1261 if (state != NULL) { 1262 state->clear_hide_single_stepping(); 1263 } 1264 } 1265 1266 1267 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 1268 JvmtiThreadState *state = thread->jvmti_thread_state(); 1269 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1270 state->set_hide_single_stepping(); 1271 return true; 1272 } else { 1273 return false; 1274 } 1275 } 1276 1277 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) { 1278 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1279 return; 1280 } 1281 HandleMark hm(thread); 1282 1283 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered", 1284 JvmtiTrace::safe_get_thread_name(thread))); 1285 JvmtiThreadState* state = thread->jvmti_thread_state(); 1286 if (state == NULL) { 1287 return; 1288 } 1289 JvmtiEnvThreadStateIterator it(state); 1290 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1291 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 1292 JvmtiEnv *env = ets->get_env(); 1293 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1294 continue; 1295 } 1296 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s", 1297 JvmtiTrace::safe_get_thread_name(thread), 1298 klass==NULL? "NULL" : klass->external_name() )); 1299 JvmtiClassEventMark jem(thread, klass); 1300 JvmtiJavaThreadEventTransition jet(thread); 1301 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 1302 if (callback != NULL) { 1303 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1304 } 1305 } 1306 } 1307 } 1308 1309 1310 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) { 1311 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1312 return; 1313 } 1314 HandleMark hm(thread); 1315 1316 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered", 1317 JvmtiTrace::safe_get_thread_name(thread))); 1318 JvmtiThreadState* state = thread->jvmti_thread_state(); 1319 if (state == NULL) { 1320 return; 1321 } 1322 JvmtiEnvThreadStateIterator it(state); 1323 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1324 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 1325 JvmtiEnv *env = ets->get_env(); 1326 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1327 continue; 1328 } 1329 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s", 1330 JvmtiTrace::safe_get_thread_name(thread), 1331 klass==NULL? "NULL" : klass->external_name() )); 1332 JvmtiClassEventMark jem(thread, klass); 1333 JvmtiJavaThreadEventTransition jet(thread); 1334 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 1335 if (callback != NULL) { 1336 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1337 } 1338 } 1339 } 1340 } 1341 1342 void JvmtiExport::post_class_unload(Klass* klass) { 1343 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1344 return; 1345 } 1346 Thread *thread = Thread::current(); 1347 HandleMark hm(thread); 1348 1349 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" )); 1350 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1351 assert(thread->is_VM_thread(), "wrong thread"); 1352 1353 // get JavaThread for whom we are proxy 1354 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread(); 1355 if (!calling_thread->is_Java_thread()) { 1356 // cannot post an event to a non-JavaThread 1357 return; 1358 } 1359 JavaThread *real_thread = (JavaThread *)calling_thread; 1360 1361 JvmtiEnvIterator it; 1362 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1363 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1364 continue; 1365 } 1366 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1367 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s", 1368 klass==NULL? "NULL" : klass->external_name() )); 1369 1370 // do everything manually, since this is a proxy - needs special care 1371 JNIEnv* jni_env = real_thread->jni_environment(); 1372 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); 1373 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror()); 1374 1375 // Before we call the JVMTI agent, we have to set the state in the 1376 // thread for which we are proxying. 1377 JavaThreadState prev_state = real_thread->thread_state(); 1378 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() || 1379 (real_thread->is_Java_thread() && prev_state == _thread_blocked), 1380 "should be ConcurrentGCThread or JavaThread at safepoint"); 1381 real_thread->set_thread_state(_thread_in_native); 1382 1383 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 1384 if (callback != NULL) { 1385 (*callback)(env->jvmti_external(), jni_env, jt, jk); 1386 } 1387 1388 assert(real_thread->thread_state() == _thread_in_native, 1389 "JavaThread should be in native"); 1390 real_thread->set_thread_state(prev_state); 1391 1392 JNIHandles::destroy_local(jk); 1393 JNIHandles::destroy_local(jt); 1394 } 1395 } 1396 } 1397 } 1398 1399 1400 void JvmtiExport::post_thread_start(JavaThread *thread) { 1401 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1402 return; 1403 } 1404 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1405 1406 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered", 1407 JvmtiTrace::safe_get_thread_name(thread))); 1408 1409 // do JVMTI thread initialization (if needed) 1410 JvmtiEventController::thread_started(thread); 1411 1412 // Do not post thread start event for hidden java thread. 1413 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1414 !thread->is_hidden_from_external_view()) { 1415 JvmtiEnvIterator it; 1416 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1417 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1418 continue; 1419 } 1420 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1421 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent", 1422 JvmtiTrace::safe_get_thread_name(thread) )); 1423 1424 JvmtiThreadEventMark jem(thread); 1425 JvmtiJavaThreadEventTransition jet(thread); 1426 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1427 if (callback != NULL) { 1428 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1429 } 1430 } 1431 } 1432 } 1433 } 1434 1435 1436 void JvmtiExport::post_thread_end(JavaThread *thread) { 1437 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1438 return; 1439 } 1440 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered", 1441 JvmtiTrace::safe_get_thread_name(thread))); 1442 1443 JvmtiThreadState *state = thread->jvmti_thread_state(); 1444 if (state == NULL) { 1445 return; 1446 } 1447 1448 // Do not post thread end event for hidden java thread. 1449 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1450 !thread->is_hidden_from_external_view()) { 1451 1452 JvmtiEnvThreadStateIterator it(state); 1453 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1454 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1455 JvmtiEnv *env = ets->get_env(); 1456 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1457 continue; 1458 } 1459 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent", 1460 JvmtiTrace::safe_get_thread_name(thread) )); 1461 1462 JvmtiThreadEventMark jem(thread); 1463 JvmtiJavaThreadEventTransition jet(thread); 1464 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1465 if (callback != NULL) { 1466 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1467 } 1468 } 1469 } 1470 } 1471 } 1472 1473 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1474 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1475 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1476 1477 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" )); 1478 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent")); 1479 1480 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1481 if (callback != NULL) { 1482 (*callback)(env->jvmti_external(), tag); 1483 } 1484 } 1485 1486 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1487 1488 JavaThread *thread = JavaThread::current(); 1489 1490 // JDK-8213834: handlers of ResourceExhausted may attempt some analysis 1491 // which often requires running java. 1492 // This will cause problems on threads not able to run java, e.g. compiler 1493 // threads. To forestall these problems, we therefore suppress sending this 1494 // event from threads which are not able to run java. 1495 if (!thread->can_call_java()) { 1496 return; 1497 } 1498 1499 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" )); 1500 1501 JvmtiEnvIterator it; 1502 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1503 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1504 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" )); 1505 1506 JvmtiThreadEventMark jem(thread); 1507 JvmtiJavaThreadEventTransition jet(thread); 1508 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1509 if (callback != NULL) { 1510 (*callback)(env->jvmti_external(), jem.jni_env(), 1511 resource_exhausted_flags, NULL, description); 1512 } 1513 } 1514 } 1515 } 1516 1517 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) { 1518 HandleMark hm(thread); 1519 methodHandle mh(thread, method); 1520 1521 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s", 1522 JvmtiTrace::safe_get_thread_name(thread), 1523 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1524 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1525 1526 JvmtiThreadState* state = thread->jvmti_thread_state(); 1527 if (state == NULL || !state->is_interp_only_mode()) { 1528 // for any thread that actually wants method entry, interp_only_mode is set 1529 return; 1530 } 1531 1532 state->incr_cur_stack_depth(); 1533 1534 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1535 JvmtiEnvThreadStateIterator it(state); 1536 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1537 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1538 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s", 1539 JvmtiTrace::safe_get_thread_name(thread), 1540 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1541 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1542 1543 JvmtiEnv *env = ets->get_env(); 1544 JvmtiMethodEventMark jem(thread, mh); 1545 JvmtiJavaThreadEventTransition jet(thread); 1546 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1547 if (callback != NULL) { 1548 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1549 } 1550 } 1551 } 1552 } 1553 } 1554 1555 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) { 1556 HandleMark hm(thread); 1557 methodHandle mh(thread, method); 1558 1559 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s", 1560 JvmtiTrace::safe_get_thread_name(thread), 1561 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1562 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1563 1564 JvmtiThreadState *state = thread->jvmti_thread_state(); 1565 if (state == NULL || !state->is_interp_only_mode()) { 1566 // for any thread that actually wants method exit, interp_only_mode is set 1567 return; 1568 } 1569 1570 // return a flag when a method terminates by throwing an exception 1571 // i.e. if an exception is thrown and it's not caught by the current method 1572 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1573 1574 1575 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1576 Handle result; 1577 jvalue value; 1578 value.j = 0L; 1579 1580 // if the method hasn't been popped because of an exception then we populate 1581 // the return_value parameter for the callback. At this point we only have 1582 // the address of a "raw result" and we just call into the interpreter to 1583 // convert this into a jvalue. 1584 if (!exception_exit) { 1585 oop oop_result; 1586 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1587 if (type == T_OBJECT || type == T_ARRAY || type == T_VALUETYPE) { 1588 result = Handle(thread, oop_result); 1589 } 1590 } 1591 1592 JvmtiEnvThreadStateIterator it(state); 1593 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1594 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1595 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s", 1596 JvmtiTrace::safe_get_thread_name(thread), 1597 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1598 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1599 1600 JvmtiEnv *env = ets->get_env(); 1601 JvmtiMethodEventMark jem(thread, mh); 1602 if (result.not_null()) { 1603 value.l = JNIHandles::make_local(thread, result()); 1604 } 1605 JvmtiJavaThreadEventTransition jet(thread); 1606 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1607 if (callback != NULL) { 1608 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1609 jem.jni_methodID(), exception_exit, value); 1610 } 1611 } 1612 } 1613 } 1614 1615 JvmtiEnvThreadStateIterator it(state); 1616 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1617 if (ets->has_frame_pops()) { 1618 int cur_frame_number = state->cur_stack_depth(); 1619 1620 if (ets->is_frame_pop(cur_frame_number)) { 1621 // we have a NotifyFramePop entry for this frame. 1622 // now check that this env/thread wants this event 1623 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1624 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s", 1625 JvmtiTrace::safe_get_thread_name(thread), 1626 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1627 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1628 1629 // we also need to issue a frame pop event for this frame 1630 JvmtiEnv *env = ets->get_env(); 1631 JvmtiMethodEventMark jem(thread, mh); 1632 JvmtiJavaThreadEventTransition jet(thread); 1633 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1634 if (callback != NULL) { 1635 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1636 jem.jni_methodID(), exception_exit); 1637 } 1638 } 1639 // remove the frame's entry 1640 ets->clear_frame_pop(cur_frame_number); 1641 } 1642 } 1643 } 1644 1645 state->decr_cur_stack_depth(); 1646 } 1647 1648 1649 // Todo: inline this for optimization 1650 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) { 1651 HandleMark hm(thread); 1652 methodHandle mh(thread, method); 1653 1654 JvmtiThreadState *state = thread->jvmti_thread_state(); 1655 if (state == NULL) { 1656 return; 1657 } 1658 JvmtiEnvThreadStateIterator it(state); 1659 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1660 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1661 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1662 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT, 1663 JvmtiTrace::safe_get_thread_name(thread), 1664 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1665 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1666 location - mh()->code_base() )); 1667 1668 JvmtiEnv *env = ets->get_env(); 1669 JvmtiLocationEventMark jem(thread, mh, location); 1670 JvmtiJavaThreadEventTransition jet(thread); 1671 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1672 if (callback != NULL) { 1673 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1674 jem.jni_methodID(), jem.location()); 1675 } 1676 1677 ets->set_single_stepping_posted(); 1678 } 1679 } 1680 } 1681 1682 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) { 1683 HandleMark hm(thread); 1684 methodHandle mh(thread, method); 1685 Handle exception_handle(thread, exception); 1686 1687 JvmtiThreadState *state = thread->jvmti_thread_state(); 1688 if (state == NULL) { 1689 return; 1690 } 1691 1692 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered", 1693 JvmtiTrace::safe_get_thread_name(thread))); 1694 if (!state->is_exception_detected()) { 1695 state->set_exception_detected(); 1696 JvmtiEnvThreadStateIterator it(state); 1697 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1698 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1699 1700 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1701 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT, 1702 JvmtiTrace::safe_get_thread_name(thread), 1703 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1704 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1705 location - mh()->code_base() )); 1706 1707 JvmtiEnv *env = ets->get_env(); 1708 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1709 1710 // It's okay to clear these exceptions here because we duplicate 1711 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1712 EXCEPTION_MARK; 1713 1714 bool should_repeat; 1715 vframeStream st(thread); 1716 assert(!st.at_end(), "cannot be at end"); 1717 Method* current_method = NULL; 1718 // A GC may occur during the Method::fast_exception_handler_bci_for() 1719 // call below if it needs to load the constraint class. Using a 1720 // methodHandle to keep the 'current_method' from being deallocated 1721 // if GC happens. 1722 methodHandle current_mh = methodHandle(thread, current_method); 1723 int current_bci = -1; 1724 do { 1725 current_method = st.method(); 1726 current_mh = methodHandle(thread, current_method); 1727 current_bci = st.bci(); 1728 do { 1729 should_repeat = false; 1730 Klass* eh_klass = exception_handle()->klass(); 1731 current_bci = Method::fast_exception_handler_bci_for( 1732 current_mh, eh_klass, current_bci, THREAD); 1733 if (HAS_PENDING_EXCEPTION) { 1734 exception_handle = Handle(thread, PENDING_EXCEPTION); 1735 CLEAR_PENDING_EXCEPTION; 1736 should_repeat = true; 1737 } 1738 } while (should_repeat && (current_bci != -1)); 1739 st.next(); 1740 } while ((current_bci < 0) && (!st.at_end())); 1741 1742 jmethodID catch_jmethodID; 1743 if (current_bci < 0) { 1744 catch_jmethodID = 0; 1745 current_bci = 0; 1746 } else { 1747 catch_jmethodID = jem.to_jmethodID(current_mh); 1748 } 1749 1750 JvmtiJavaThreadEventTransition jet(thread); 1751 jvmtiEventException callback = env->callbacks()->Exception; 1752 if (callback != NULL) { 1753 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1754 jem.jni_methodID(), jem.location(), 1755 jem.exception(), 1756 catch_jmethodID, current_bci); 1757 } 1758 } 1759 } 1760 } 1761 1762 // frames may get popped because of this throw, be safe - invalidate cached depth 1763 state->invalidate_cur_stack_depth(); 1764 } 1765 1766 1767 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) { 1768 HandleMark hm(thread); 1769 methodHandle mh(thread, method); 1770 Handle exception_handle(thread, exception); 1771 1772 JvmtiThreadState *state = thread->jvmti_thread_state(); 1773 if (state == NULL) { 1774 return; 1775 } 1776 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1777 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s", 1778 JvmtiTrace::safe_get_thread_name(thread), 1779 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1780 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1781 location==0? "no location:" : "", 1782 location==0? 0 : location - mh()->code_base(), 1783 in_handler_frame? "in handler frame" : "not handler frame" )); 1784 1785 if (state->is_exception_detected()) { 1786 1787 state->invalidate_cur_stack_depth(); 1788 if (!in_handler_frame) { 1789 // Not in exception handler. 1790 if(state->is_interp_only_mode()) { 1791 // method exit and frame pop events are posted only in interp mode. 1792 // When these events are enabled code should be in running in interp mode. 1793 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1794 // The cached cur_stack_depth might have changed from the 1795 // operations of frame pop or method exit. We are not 100% sure 1796 // the cached cur_stack_depth is still valid depth so invalidate 1797 // it. 1798 state->invalidate_cur_stack_depth(); 1799 } 1800 } else { 1801 // In exception handler frame. Report exception catch. 1802 assert(location != NULL, "must be a known location"); 1803 // Update cur_stack_depth - the frames above the current frame 1804 // have been unwound due to this exception: 1805 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1806 state->set_exception_caught(); 1807 1808 JvmtiEnvThreadStateIterator it(state); 1809 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1810 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1811 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1812 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT, 1813 JvmtiTrace::safe_get_thread_name(thread), 1814 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1815 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1816 location - mh()->code_base() )); 1817 1818 JvmtiEnv *env = ets->get_env(); 1819 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1820 JvmtiJavaThreadEventTransition jet(thread); 1821 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1822 if (callback != NULL) { 1823 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1824 jem.jni_methodID(), jem.location(), 1825 jem.exception()); 1826 } 1827 } 1828 } 1829 } 1830 } 1831 } 1832 1833 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1834 Klass* klass, jfieldID fieldID, bool is_static) { 1835 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1836 // At least one field access watch is set so we have more work 1837 // to do. This wrapper is used by entry points that allow us 1838 // to create handles in post_field_access_by_jni(). 1839 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1840 // event posting can block so refetch oop if we were passed a jobj 1841 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1842 } 1843 return obj; 1844 } 1845 1846 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1847 Klass* klass, jfieldID fieldID, bool is_static) { 1848 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1849 // At least one field access watch is set so we have more work 1850 // to do. This wrapper is used by "quick" entry points that don't 1851 // allow us to create handles in post_field_access_by_jni(). We 1852 // override that with a ResetNoHandleMark. 1853 ResetNoHandleMark rnhm; 1854 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1855 // event posting can block so refetch oop if we were passed a jobj 1856 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1857 } 1858 return obj; 1859 } 1860 1861 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1862 Klass* klass, jfieldID fieldID, bool is_static) { 1863 // We must be called with a Java context in order to provide reasonable 1864 // values for the klazz, method, and location fields. The callers of this 1865 // function don't make the call unless there is a Java context. 1866 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1867 1868 ResourceMark rm; 1869 fieldDescriptor fd; 1870 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1871 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1872 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1873 if (!valid_fieldID) return; 1874 // field accesses are not watched so bail 1875 if (!fd.is_field_access_watched()) return; 1876 1877 HandleMark hm(thread); 1878 Handle h_obj; 1879 if (!is_static) { 1880 // non-static field accessors have an object, but we need a handle 1881 assert(obj != NULL, "non-static needs an object"); 1882 h_obj = Handle(thread, obj); 1883 } 1884 post_field_access(thread, 1885 thread->last_frame().interpreter_frame_method(), 1886 thread->last_frame().interpreter_frame_bcp(), 1887 klass, h_obj, fieldID); 1888 } 1889 1890 void JvmtiExport::post_field_access(JavaThread *thread, Method* method, 1891 address location, Klass* field_klass, Handle object, jfieldID field) { 1892 1893 HandleMark hm(thread); 1894 methodHandle mh(thread, method); 1895 1896 JvmtiThreadState *state = thread->jvmti_thread_state(); 1897 if (state == NULL) { 1898 return; 1899 } 1900 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered", 1901 JvmtiTrace::safe_get_thread_name(thread))); 1902 JvmtiEnvThreadStateIterator it(state); 1903 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1904 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1905 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT, 1906 JvmtiTrace::safe_get_thread_name(thread), 1907 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1908 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1909 location - mh()->code_base() )); 1910 1911 JvmtiEnv *env = ets->get_env(); 1912 JvmtiLocationEventMark jem(thread, mh, location); 1913 jclass field_jclass = jem.to_jclass(field_klass); 1914 jobject field_jobject = jem.to_jobject(object()); 1915 JvmtiJavaThreadEventTransition jet(thread); 1916 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1917 if (callback != NULL) { 1918 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1919 jem.jni_methodID(), jem.location(), 1920 field_jclass, field_jobject, field); 1921 } 1922 } 1923 } 1924 } 1925 1926 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1927 Klass* klass, jfieldID fieldID, bool is_static, 1928 char sig_type, jvalue *value) { 1929 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1930 // At least one field modification watch is set so we have more work 1931 // to do. This wrapper is used by entry points that allow us 1932 // to create handles in post_field_modification_by_jni(). 1933 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1934 // event posting can block so refetch oop if we were passed a jobj 1935 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1936 } 1937 return obj; 1938 } 1939 1940 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1941 Klass* klass, jfieldID fieldID, bool is_static, 1942 char sig_type, jvalue *value) { 1943 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1944 // At least one field modification watch is set so we have more work 1945 // to do. This wrapper is used by "quick" entry points that don't 1946 // allow us to create handles in post_field_modification_by_jni(). We 1947 // override that with a ResetNoHandleMark. 1948 ResetNoHandleMark rnhm; 1949 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1950 // event posting can block so refetch oop if we were passed a jobj 1951 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1952 } 1953 return obj; 1954 } 1955 1956 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1957 Klass* klass, jfieldID fieldID, bool is_static, 1958 char sig_type, jvalue *value) { 1959 // We must be called with a Java context in order to provide reasonable 1960 // values for the klazz, method, and location fields. The callers of this 1961 // function don't make the call unless there is a Java context. 1962 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1963 1964 ResourceMark rm; 1965 fieldDescriptor fd; 1966 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1967 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1968 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1969 if (!valid_fieldID) return; 1970 // field modifications are not watched so bail 1971 if (!fd.is_field_modification_watched()) return; 1972 1973 HandleMark hm(thread); 1974 1975 Handle h_obj; 1976 if (!is_static) { 1977 // non-static field accessors have an object, but we need a handle 1978 assert(obj != NULL, "non-static needs an object"); 1979 h_obj = Handle(thread, obj); 1980 } 1981 post_field_modification(thread, 1982 thread->last_frame().interpreter_frame_method(), 1983 thread->last_frame().interpreter_frame_bcp(), 1984 klass, h_obj, fieldID, sig_type, value); 1985 } 1986 1987 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method, 1988 address location, Klass* field_klass, Handle object, jfieldID field, 1989 char sig_type, jvalue *value) { 1990 1991 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') { 1992 // 'I' instructions are used for byte, char, short and int. 1993 // determine which it really is, and convert 1994 fieldDescriptor fd; 1995 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd); 1996 // should be found (if not, leave as is) 1997 if (found) { 1998 jint ival = value->i; 1999 // convert value from int to appropriate type 2000 switch (fd.field_type()) { 2001 case T_BOOLEAN: 2002 sig_type = 'Z'; 2003 value->i = 0; // clear it 2004 value->z = (jboolean)ival; 2005 break; 2006 case T_BYTE: 2007 sig_type = 'B'; 2008 value->i = 0; // clear it 2009 value->b = (jbyte)ival; 2010 break; 2011 case T_CHAR: 2012 sig_type = 'C'; 2013 value->i = 0; // clear it 2014 value->c = (jchar)ival; 2015 break; 2016 case T_SHORT: 2017 sig_type = 'S'; 2018 value->i = 0; // clear it 2019 value->s = (jshort)ival; 2020 break; 2021 case T_INT: 2022 // nothing to do 2023 break; 2024 default: 2025 // this is an integer instruction, should be one of above 2026 ShouldNotReachHere(); 2027 break; 2028 } 2029 } 2030 } 2031 2032 assert(sig_type != '[', "array should have sig_type == 'L'"); 2033 bool handle_created = false; 2034 2035 // convert oop to JNI handle. 2036 if (sig_type == 'L') { 2037 handle_created = true; 2038 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 2039 } 2040 2041 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 2042 2043 // Destroy the JNI handle allocated above. 2044 if (handle_created) { 2045 JNIHandles::destroy_local(value->l); 2046 } 2047 } 2048 2049 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method, 2050 address location, Klass* field_klass, Handle object, jfieldID field, 2051 char sig_type, jvalue *value_ptr) { 2052 2053 HandleMark hm(thread); 2054 methodHandle mh(thread, method); 2055 2056 JvmtiThreadState *state = thread->jvmti_thread_state(); 2057 if (state == NULL) { 2058 return; 2059 } 2060 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2061 ("[%s] Trg Field Modification event triggered", 2062 JvmtiTrace::safe_get_thread_name(thread))); 2063 2064 JvmtiEnvThreadStateIterator it(state); 2065 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2066 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 2067 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2068 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT, 2069 JvmtiTrace::safe_get_thread_name(thread), 2070 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 2071 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 2072 location - mh()->code_base() )); 2073 2074 JvmtiEnv *env = ets->get_env(); 2075 JvmtiLocationEventMark jem(thread, mh, location); 2076 jclass field_jclass = jem.to_jclass(field_klass); 2077 jobject field_jobject = jem.to_jobject(object()); 2078 JvmtiJavaThreadEventTransition jet(thread); 2079 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 2080 if (callback != NULL) { 2081 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2082 jem.jni_methodID(), jem.location(), 2083 field_jclass, field_jobject, field, sig_type, *value_ptr); 2084 } 2085 } 2086 } 2087 } 2088 2089 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) { 2090 JavaThread* thread = JavaThread::current(); 2091 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 2092 2093 HandleMark hm(thread); 2094 methodHandle mh(thread, method); 2095 2096 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered", 2097 JvmtiTrace::safe_get_thread_name(thread))); 2098 2099 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2100 JvmtiEnvIterator it; 2101 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2102 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2103 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent", 2104 JvmtiTrace::safe_get_thread_name(thread) )); 2105 2106 JvmtiMethodEventMark jem(thread, mh); 2107 JvmtiJavaThreadEventTransition jet(thread); 2108 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env(); 2109 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 2110 if (callback != NULL) { 2111 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 2112 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 2113 } 2114 } 2115 } 2116 } 2117 } 2118 2119 // Returns a record containing inlining information for the given nmethod 2120 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 2121 jint numstackframes = 0; 2122 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 2123 record->header.kind = JVMTI_CMLR_INLINE_INFO; 2124 record->header.next = NULL; 2125 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 2126 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 2127 record->numpcs = 0; 2128 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2129 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2130 record->numpcs++; 2131 } 2132 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 2133 int scope = 0; 2134 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2135 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2136 void* pc_address = (void*)p->real_pc(nm); 2137 assert(pc_address != NULL, "pc_address must be non-null"); 2138 record->pcinfo[scope].pc = pc_address; 2139 numstackframes=0; 2140 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2141 numstackframes++; 2142 } 2143 assert(numstackframes != 0, "numstackframes must be nonzero."); 2144 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 2145 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 2146 record->pcinfo[scope].numstackframes = numstackframes; 2147 int stackframe = 0; 2148 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2149 // 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() 2150 assert(sd->method() != NULL, "sd->method() cannot be null."); 2151 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 2152 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 2153 stackframe++; 2154 } 2155 scope++; 2156 } 2157 return record; 2158 } 2159 2160 void JvmtiExport::post_compiled_method_load(nmethod *nm) { 2161 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 2162 return; 2163 } 2164 JavaThread* thread = JavaThread::current(); 2165 2166 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2167 ("[%s] method compile load event triggered", 2168 JvmtiTrace::safe_get_thread_name(thread))); 2169 2170 JvmtiEnvIterator it; 2171 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2172 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 2173 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 2174 continue; 2175 } 2176 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2177 ("[%s] class compile method load event sent %s.%s ", 2178 JvmtiTrace::safe_get_thread_name(thread), 2179 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 2180 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 2181 ResourceMark rm(thread); 2182 HandleMark hm(thread); 2183 2184 // Add inlining information 2185 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 2186 // Pass inlining information through the void pointer 2187 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 2188 JvmtiJavaThreadEventTransition jet(thread); 2189 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 2190 if (callback != NULL) { 2191 (*callback)(env->jvmti_external(), jem.jni_methodID(), 2192 jem.code_size(), jem.code_data(), jem.map_length(), 2193 jem.map(), jem.compile_info()); 2194 } 2195 } 2196 } 2197 } 2198 2199 2200 // post a COMPILED_METHOD_LOAD event for a given environment 2201 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, 2202 const void *code_begin, const jint map_length, 2203 const jvmtiAddrLocationMap* map) 2204 { 2205 if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) { 2206 return; 2207 } 2208 JavaThread* thread = JavaThread::current(); 2209 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2210 ("[%s] method compile load event triggered (by GenerateEvents)", 2211 JvmtiTrace::safe_get_thread_name(thread))); 2212 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 2213 2214 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2215 ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT, 2216 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 2217 2218 JvmtiEventMark jem(thread); 2219 JvmtiJavaThreadEventTransition jet(thread); 2220 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 2221 if (callback != NULL) { 2222 (*callback)(env->jvmti_external(), method, 2223 length, code_begin, map_length, 2224 map, NULL); 2225 } 2226 } 2227 } 2228 2229 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 2230 assert(name != NULL && name[0] != '\0', "sanity check"); 2231 2232 JavaThread* thread = JavaThread::current(); 2233 // In theory everyone coming thru here is in_vm but we need to be certain 2234 // because a callee will do a vm->native transition 2235 ThreadInVMfromUnknown __tiv; 2236 2237 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2238 ("[%s] method dynamic code generated event triggered", 2239 JvmtiTrace::safe_get_thread_name(thread))); 2240 JvmtiEnvIterator it; 2241 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2242 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2243 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2244 ("[%s] dynamic code generated event sent for %s", 2245 JvmtiTrace::safe_get_thread_name(thread), name)); 2246 JvmtiEventMark jem(thread); 2247 JvmtiJavaThreadEventTransition jet(thread); 2248 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2249 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2250 if (callback != NULL) { 2251 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2252 } 2253 } 2254 } 2255 } 2256 2257 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 2258 jvmtiPhase phase = JvmtiEnv::get_phase(); 2259 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 2260 post_dynamic_code_generated_internal(name, code_begin, code_end); 2261 } else { 2262 // It may not be safe to post the event from this thread. Defer all 2263 // postings to the service thread so that it can perform them in a safe 2264 // context and in-order. 2265 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); 2266 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 2267 name, code_begin, code_end); 2268 JvmtiDeferredEventQueue::enqueue(event); 2269 } 2270 } 2271 2272 2273 // post a DYNAMIC_CODE_GENERATED event for a given environment 2274 // used by GenerateEvents 2275 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 2276 const void *code_begin, const void *code_end) 2277 { 2278 JavaThread* thread = JavaThread::current(); 2279 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2280 ("[%s] dynamic code generated event triggered (by GenerateEvents)", 2281 JvmtiTrace::safe_get_thread_name(thread))); 2282 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2283 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2284 ("[%s] dynamic code generated event sent for %s", 2285 JvmtiTrace::safe_get_thread_name(thread), name)); 2286 JvmtiEventMark jem(thread); 2287 JvmtiJavaThreadEventTransition jet(thread); 2288 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2289 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2290 if (callback != NULL) { 2291 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2292 } 2293 } 2294 } 2295 2296 // post a DynamicCodeGenerated event while holding locks in the VM. 2297 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 2298 address code_begin, address code_end) 2299 { 2300 // register the stub with the current dynamic code event collector 2301 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2302 // state can only be NULL if the current thread is exiting which 2303 // should not happen since we're trying to post an event 2304 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 2305 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 2306 guarantee(collector != NULL, "attempt to register stub without event collector"); 2307 collector->register_stub(name, code_begin, code_end); 2308 } 2309 2310 // Collect all the vm internally allocated objects which are visible to java world 2311 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 2312 Thread* thread = Thread::current_or_null(); 2313 if (thread != NULL && thread->is_Java_thread()) { 2314 // Can not take safepoint here. 2315 NoSafepointVerifier no_sfpt; 2316 // Can not take safepoint here so can not use state_for to get 2317 // jvmti thread state. 2318 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2319 if (state != NULL) { 2320 // state is non NULL when VMObjectAllocEventCollector is enabled. 2321 JvmtiVMObjectAllocEventCollector *collector; 2322 collector = state->get_vm_object_alloc_event_collector(); 2323 if (collector != NULL && collector->is_enabled()) { 2324 // Don't record classes as these will be notified via the ClassLoad 2325 // event. 2326 if (obj->klass() != SystemDictionary::Class_klass()) { 2327 collector->record_allocation(obj); 2328 } 2329 } 2330 } 2331 } 2332 } 2333 2334 // Collect all the sampled allocated objects. 2335 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) { 2336 Thread* thread = Thread::current_or_null(); 2337 if (thread != NULL && thread->is_Java_thread()) { 2338 // Can not take safepoint here. 2339 NoSafepointVerifier no_sfpt; 2340 // Can not take safepoint here so can not use state_for to get 2341 // jvmti thread state. 2342 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2343 if (state != NULL) { 2344 // state is non NULL when SampledObjectAllocEventCollector is enabled. 2345 JvmtiSampledObjectAllocEventCollector *collector; 2346 collector = state->get_sampled_object_alloc_event_collector(); 2347 2348 if (collector != NULL && collector->is_enabled()) { 2349 collector->record_allocation(obj); 2350 } 2351 } 2352 } 2353 } 2354 2355 void JvmtiExport::post_garbage_collection_finish() { 2356 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 2357 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2358 ("[%s] garbage collection finish event triggered", 2359 JvmtiTrace::safe_get_thread_name(thread))); 2360 JvmtiEnvIterator it; 2361 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2362 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 2363 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2364 ("[%s] garbage collection finish event sent", 2365 JvmtiTrace::safe_get_thread_name(thread))); 2366 JvmtiThreadEventTransition jet(thread); 2367 // JNIEnv is NULL here because this event is posted from VM Thread 2368 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 2369 if (callback != NULL) { 2370 (*callback)(env->jvmti_external()); 2371 } 2372 } 2373 } 2374 } 2375 2376 void JvmtiExport::post_garbage_collection_start() { 2377 Thread* thread = Thread::current(); // this event is posted from vm-thread. 2378 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2379 ("[%s] garbage collection start event triggered", 2380 JvmtiTrace::safe_get_thread_name(thread))); 2381 JvmtiEnvIterator it; 2382 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2383 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 2384 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2385 ("[%s] garbage collection start event sent", 2386 JvmtiTrace::safe_get_thread_name(thread))); 2387 JvmtiThreadEventTransition jet(thread); 2388 // JNIEnv is NULL here because this event is posted from VM Thread 2389 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 2390 if (callback != NULL) { 2391 (*callback)(env->jvmti_external()); 2392 } 2393 } 2394 } 2395 } 2396 2397 void JvmtiExport::post_data_dump() { 2398 Thread *thread = Thread::current(); 2399 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2400 ("[%s] data dump request event triggered", 2401 JvmtiTrace::safe_get_thread_name(thread))); 2402 JvmtiEnvIterator it; 2403 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2404 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 2405 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2406 ("[%s] data dump request event sent", 2407 JvmtiTrace::safe_get_thread_name(thread))); 2408 JvmtiThreadEventTransition jet(thread); 2409 // JNIEnv is NULL here because this event is posted from VM Thread 2410 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 2411 if (callback != NULL) { 2412 (*callback)(env->jvmti_external()); 2413 } 2414 } 2415 } 2416 } 2417 2418 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 2419 oop object = (oop)obj_mntr->object(); 2420 JvmtiThreadState *state = thread->jvmti_thread_state(); 2421 if (state == NULL) { 2422 return; 2423 } 2424 2425 HandleMark hm(thread); 2426 Handle h(thread, object); 2427 2428 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2429 ("[%s] monitor contended enter event triggered", 2430 JvmtiTrace::safe_get_thread_name(thread))); 2431 2432 JvmtiEnvThreadStateIterator it(state); 2433 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2434 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2435 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2436 ("[%s] monitor contended enter event sent", 2437 JvmtiTrace::safe_get_thread_name(thread))); 2438 JvmtiMonitorEventMark jem(thread, h()); 2439 JvmtiEnv *env = ets->get_env(); 2440 JvmtiThreadEventTransition jet(thread); 2441 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2442 if (callback != NULL) { 2443 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2444 } 2445 } 2446 } 2447 } 2448 2449 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2450 oop object = (oop)obj_mntr->object(); 2451 JvmtiThreadState *state = thread->jvmti_thread_state(); 2452 if (state == NULL) { 2453 return; 2454 } 2455 2456 HandleMark hm(thread); 2457 Handle h(thread, object); 2458 2459 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2460 ("[%s] monitor contended entered event triggered", 2461 JvmtiTrace::safe_get_thread_name(thread))); 2462 2463 JvmtiEnvThreadStateIterator it(state); 2464 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2465 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2466 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2467 ("[%s] monitor contended enter event sent", 2468 JvmtiTrace::safe_get_thread_name(thread))); 2469 JvmtiMonitorEventMark jem(thread, h()); 2470 JvmtiEnv *env = ets->get_env(); 2471 JvmtiThreadEventTransition jet(thread); 2472 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2473 if (callback != NULL) { 2474 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2475 } 2476 } 2477 } 2478 } 2479 2480 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2481 jlong timeout) { 2482 JvmtiThreadState *state = thread->jvmti_thread_state(); 2483 if (state == NULL) { 2484 return; 2485 } 2486 2487 HandleMark hm(thread); 2488 Handle h(thread, object); 2489 2490 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2491 ("[%s] monitor wait event triggered", 2492 JvmtiTrace::safe_get_thread_name(thread))); 2493 2494 JvmtiEnvThreadStateIterator it(state); 2495 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2496 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2497 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2498 ("[%s] monitor wait event sent", 2499 JvmtiTrace::safe_get_thread_name(thread))); 2500 JvmtiMonitorEventMark jem(thread, h()); 2501 JvmtiEnv *env = ets->get_env(); 2502 JvmtiThreadEventTransition jet(thread); 2503 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2504 if (callback != NULL) { 2505 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2506 jem.jni_object(), timeout); 2507 } 2508 } 2509 } 2510 } 2511 2512 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2513 oop object = (oop)obj_mntr->object(); 2514 JvmtiThreadState *state = thread->jvmti_thread_state(); 2515 if (state == NULL) { 2516 return; 2517 } 2518 2519 HandleMark hm(thread); 2520 Handle h(thread, object); 2521 2522 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2523 ("[%s] monitor waited event triggered", 2524 JvmtiTrace::safe_get_thread_name(thread))); 2525 2526 JvmtiEnvThreadStateIterator it(state); 2527 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2528 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2529 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2530 ("[%s] monitor waited event sent", 2531 JvmtiTrace::safe_get_thread_name(thread))); 2532 JvmtiMonitorEventMark jem(thread, h()); 2533 JvmtiEnv *env = ets->get_env(); 2534 JvmtiThreadEventTransition jet(thread); 2535 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2536 if (callback != NULL) { 2537 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2538 jem.jni_object(), timed_out); 2539 } 2540 } 2541 } 2542 } 2543 2544 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2545 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered", 2546 JvmtiTrace::safe_get_thread_name(thread))); 2547 if (object == NULL) { 2548 return; 2549 } 2550 HandleMark hm(thread); 2551 Handle h(thread, object); 2552 JvmtiEnvIterator it; 2553 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2554 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2555 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s", 2556 JvmtiTrace::safe_get_thread_name(thread), 2557 object==NULL? "NULL" : object->klass()->external_name())); 2558 2559 JvmtiObjectAllocEventMark jem(thread, h()); 2560 JvmtiJavaThreadEventTransition jet(thread); 2561 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2562 if (callback != NULL) { 2563 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2564 jem.jni_jobject(), jem.jni_class(), jem.size()); 2565 } 2566 } 2567 } 2568 } 2569 2570 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) { 2571 JvmtiThreadState *state = thread->jvmti_thread_state(); 2572 if (state == NULL) { 2573 return; 2574 } 2575 2576 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2577 ("[%s] Trg sampled object alloc triggered", 2578 JvmtiTrace::safe_get_thread_name(thread))); 2579 if (object == NULL) { 2580 return; 2581 } 2582 HandleMark hm(thread); 2583 Handle h(thread, object); 2584 2585 JvmtiEnvThreadStateIterator it(state); 2586 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2587 if (ets->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) { 2588 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2589 ("[%s] Evt sampled object alloc sent %s", 2590 JvmtiTrace::safe_get_thread_name(thread), 2591 object == NULL ? "NULL" : object->klass()->external_name())); 2592 2593 JvmtiEnv *env = ets->get_env(); 2594 JvmtiObjectAllocEventMark jem(thread, h()); 2595 JvmtiJavaThreadEventTransition jet(thread); 2596 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc; 2597 if (callback != NULL) { 2598 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2599 jem.jni_jobject(), jem.jni_class(), jem.size()); 2600 } 2601 } 2602 } 2603 } 2604 2605 //////////////////////////////////////////////////////////////////////////////////////////////// 2606 2607 void JvmtiExport::cleanup_thread(JavaThread* thread) { 2608 assert(JavaThread::current() == thread, "thread is not current"); 2609 MutexLocker mu(JvmtiThreadState_lock); 2610 2611 if (thread->jvmti_thread_state() != NULL) { 2612 // This has to happen after the thread state is removed, which is 2613 // why it is not in post_thread_end_event like its complement 2614 // Maybe both these functions should be rolled into the posts? 2615 JvmtiEventController::thread_ended(thread); 2616 } 2617 } 2618 2619 void JvmtiExport::clear_detected_exception(JavaThread* thread) { 2620 assert(JavaThread::current() == thread, "thread is not current"); 2621 2622 JvmtiThreadState* state = thread->jvmti_thread_state(); 2623 if (state != NULL) { 2624 state->clear_exception_state(); 2625 } 2626 } 2627 2628 void JvmtiExport::oops_do(OopClosure* f) { 2629 JvmtiCurrentBreakpoints::oops_do(f); 2630 JvmtiObjectAllocEventCollector::oops_do_for_all_threads(f); 2631 } 2632 2633 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { 2634 JvmtiTagMap::weak_oops_do(is_alive, f); 2635 } 2636 2637 void JvmtiExport::gc_epilogue() { 2638 JvmtiCurrentBreakpoints::gc_epilogue(); 2639 } 2640 2641 // Onload raw monitor transition. 2642 void JvmtiExport::transition_pending_onload_raw_monitors() { 2643 JvmtiPendingMonitors::transition_raw_monitors(); 2644 } 2645 2646 //////////////////////////////////////////////////////////////////////////////////////////////// 2647 #if INCLUDE_SERVICES 2648 // Attach is disabled if SERVICES is not included 2649 2650 // type for the Agent_OnAttach entry point 2651 extern "C" { 2652 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2653 } 2654 2655 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam, 2656 const char *options, outputStream* st) { 2657 char ebuf[1024] = {0}; 2658 char buffer[JVM_MAXPATHLEN]; 2659 void* library = NULL; 2660 jint result = JNI_ERR; 2661 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2662 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols); 2663 2664 // The abs paramter should be "true" or "false" 2665 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2666 2667 // Initially marked as invalid. It will be set to valid if we can find the agent 2668 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL); 2669 2670 // Check for statically linked in agent. If not found then if the path is 2671 // absolute we attempt to load the library. Otherwise we try to load it 2672 // from the standard dll directory. 2673 2674 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) { 2675 if (is_absolute_path) { 2676 library = os::dll_load(agent, ebuf, sizeof ebuf); 2677 } else { 2678 // Try to load the agent from the standard dll directory 2679 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(), 2680 agent)) { 2681 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2682 } 2683 if (library == NULL) { 2684 // not found - try OS default library path 2685 if (os::dll_build_name(buffer, sizeof(buffer), agent)) { 2686 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2687 } 2688 } 2689 } 2690 if (library != NULL) { 2691 agent_lib->set_os_lib(library); 2692 agent_lib->set_valid(); 2693 } 2694 } 2695 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2696 // function 2697 if (agent_lib->valid()) { 2698 // Lookup the Agent_OnAttach function 2699 OnAttachEntry_t on_attach_entry = NULL; 2700 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, 2701 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries)); 2702 if (on_attach_entry == NULL) { 2703 // Agent_OnAttach missing - unload library 2704 if (!agent_lib->is_static_lib()) { 2705 os::dll_unload(library); 2706 } 2707 st->print_cr("%s is not available in %s", 2708 on_attach_symbols[0], agent_lib->name()); 2709 delete agent_lib; 2710 } else { 2711 // Invoke the Agent_OnAttach function 2712 JavaThread* THREAD = JavaThread::current(); 2713 { 2714 extern struct JavaVM_ main_vm; 2715 JvmtiThreadEventMark jem(THREAD); 2716 JvmtiJavaThreadEventTransition jet(THREAD); 2717 2718 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2719 } 2720 2721 // Agent_OnAttach may have used JNI 2722 if (HAS_PENDING_EXCEPTION) { 2723 CLEAR_PENDING_EXCEPTION; 2724 } 2725 2726 // If OnAttach returns JNI_OK then we add it to the list of 2727 // agent libraries so that we can call Agent_OnUnload later. 2728 if (result == JNI_OK) { 2729 Arguments::add_loaded_agent(agent_lib); 2730 } else { 2731 delete agent_lib; 2732 } 2733 2734 // Agent_OnAttach executed so completion status is JNI_OK 2735 st->print_cr("return code: %d", result); 2736 result = JNI_OK; 2737 } 2738 } else { 2739 st->print_cr("%s was not loaded.", agent); 2740 if (*ebuf != '\0') { 2741 st->print_cr("%s", ebuf); 2742 } 2743 } 2744 return result; 2745 } 2746 2747 #endif // INCLUDE_SERVICES 2748 //////////////////////////////////////////////////////////////////////////////////////////////// 2749 2750 // Setup current current thread for event collection. 2751 void JvmtiEventCollector::setup_jvmti_thread_state() { 2752 // set this event collector to be the current one. 2753 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2754 // state can only be NULL if the current thread is exiting which 2755 // should not happen since we're trying to configure for event collection 2756 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2757 if (is_vm_object_alloc_event()) { 2758 JvmtiVMObjectAllocEventCollector *prev = state->get_vm_object_alloc_event_collector(); 2759 2760 // If we have a previous collector and it is disabled, it means this allocation came from a 2761 // callback induced VM Object allocation, do not register this collector then. 2762 if (prev && !prev->is_enabled()) { 2763 return; 2764 } 2765 _prev = prev; 2766 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2767 } else if (is_dynamic_code_event()) { 2768 _prev = state->get_dynamic_code_event_collector(); 2769 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2770 } else if (is_sampled_object_alloc_event()) { 2771 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector(); 2772 2773 if (prev) { 2774 // JvmtiSampledObjectAllocEventCollector wants only one active collector 2775 // enabled. This allows to have a collector detect a user code requiring 2776 // a sample in the callback. 2777 return; 2778 } 2779 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this); 2780 } 2781 2782 _unset_jvmti_thread_state = true; 2783 } 2784 2785 // Unset current event collection in this thread and reset it with previous 2786 // collector. 2787 void JvmtiEventCollector::unset_jvmti_thread_state() { 2788 if (!_unset_jvmti_thread_state) { 2789 return; 2790 } 2791 2792 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2793 if (state != NULL) { 2794 // restore the previous event collector (if any) 2795 if (is_vm_object_alloc_event()) { 2796 if (state->get_vm_object_alloc_event_collector() == this) { 2797 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2798 } else { 2799 // this thread's jvmti state was created during the scope of 2800 // the event collector. 2801 } 2802 } else if (is_dynamic_code_event()) { 2803 if (state->get_dynamic_code_event_collector() == this) { 2804 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2805 } else { 2806 // this thread's jvmti state was created during the scope of 2807 // the event collector. 2808 } 2809 } else if (is_sampled_object_alloc_event()) { 2810 if (state->get_sampled_object_alloc_event_collector() == this) { 2811 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev); 2812 } else { 2813 // this thread's jvmti state was created during the scope of 2814 // the event collector. 2815 } 2816 } 2817 } 2818 } 2819 2820 // create the dynamic code event collector 2821 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2822 if (JvmtiExport::should_post_dynamic_code_generated()) { 2823 setup_jvmti_thread_state(); 2824 } 2825 } 2826 2827 // iterate over any code blob descriptors collected and post a 2828 // DYNAMIC_CODE_GENERATED event to the profiler. 2829 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2830 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2831 // iterate over any code blob descriptors that we collected 2832 if (_code_blobs != NULL) { 2833 for (int i=0; i<_code_blobs->length(); i++) { 2834 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2835 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2836 FreeHeap(blob); 2837 } 2838 delete _code_blobs; 2839 } 2840 unset_jvmti_thread_state(); 2841 } 2842 2843 // register a stub 2844 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2845 if (_code_blobs == NULL) { 2846 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true); 2847 } 2848 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2849 } 2850 2851 // Setup current thread to record vm allocated objects. 2852 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() : 2853 _allocated(NULL), _enable(false), _post_callback(NULL) { 2854 } 2855 2856 // Post vm_object_alloc event for vm allocated objects visible to java 2857 // world. 2858 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() { 2859 if (_allocated) { 2860 set_enabled(false); 2861 for (int i = 0; i < _allocated->length(); i++) { 2862 oop obj = _allocated->at(i); 2863 _post_callback(JavaThread::current(), obj); 2864 } 2865 delete _allocated, _allocated = NULL; 2866 } 2867 } 2868 2869 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) { 2870 assert(is_enabled(), "Object alloc event collector is not enabled"); 2871 if (_allocated == NULL) { 2872 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true); 2873 } 2874 _allocated->push(obj); 2875 } 2876 2877 // GC support. 2878 void JvmtiObjectAllocEventCollector::oops_do(OopClosure* f) { 2879 if (_allocated) { 2880 for(int i = _allocated->length() - 1; i >= 0; i--) { 2881 if (_allocated->at(i) != NULL) { 2882 f->do_oop(_allocated->adr_at(i)); 2883 } 2884 } 2885 } 2886 } 2887 2888 void JvmtiObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { 2889 // no-op if jvmti not enabled 2890 if (!JvmtiEnv::environments_might_exist()) { 2891 return; 2892 } 2893 2894 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) { 2895 JvmtiThreadState *state = jthr->jvmti_thread_state(); 2896 if (state != NULL) { 2897 JvmtiObjectAllocEventCollector *collector; 2898 collector = state->get_vm_object_alloc_event_collector(); 2899 while (collector != NULL) { 2900 collector->oops_do(f); 2901 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev(); 2902 } 2903 2904 collector = state->get_sampled_object_alloc_event_collector(); 2905 while (collector != NULL) { 2906 collector->oops_do(f); 2907 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev(); 2908 } 2909 } 2910 } 2911 } 2912 2913 2914 // Disable collection of VMObjectAlloc events 2915 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2916 // a no-op if VMObjectAlloc event is not enabled 2917 if (!JvmtiExport::should_post_vm_object_alloc()) { 2918 return; 2919 } 2920 Thread* thread = Thread::current_or_null(); 2921 if (thread != NULL && thread->is_Java_thread()) { 2922 JavaThread* current_thread = (JavaThread*)thread; 2923 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2924 if (state != NULL) { 2925 JvmtiVMObjectAllocEventCollector *collector; 2926 collector = state->get_vm_object_alloc_event_collector(); 2927 if (collector != NULL && collector->is_enabled()) { 2928 _collector = collector; 2929 _collector->set_enabled(false); 2930 } 2931 } 2932 } 2933 } 2934 2935 // Re-Enable collection of VMObjectAlloc events (if previously enabled) 2936 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2937 if (was_enabled()) { 2938 _collector->set_enabled(true); 2939 } 2940 }; 2941 2942 // Setup current thread to record vm allocated objects. 2943 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() { 2944 if (JvmtiExport::should_post_vm_object_alloc()) { 2945 _enable = true; 2946 setup_jvmti_thread_state(); 2947 _post_callback = JvmtiExport::post_vm_object_alloc; 2948 } 2949 } 2950 2951 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2952 if (_enable) { 2953 generate_call_for_allocated(); 2954 } 2955 unset_jvmti_thread_state(); 2956 } 2957 2958 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() { 2959 Thread* thread = Thread::current(); 2960 // Really only sample allocations if this is a JavaThread and not the compiler 2961 // thread. 2962 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) { 2963 return false; 2964 } 2965 2966 if (MultiArray_lock->owner() == thread) { 2967 return false; 2968 } 2969 return true; 2970 } 2971 2972 // Setup current thread to record sampled allocated objects. 2973 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() { 2974 if (JvmtiExport::should_post_sampled_object_alloc()) { 2975 if (!object_alloc_is_safe_to_sample()) { 2976 return; 2977 } 2978 2979 _enable = true; 2980 setup_jvmti_thread_state(); 2981 _post_callback = JvmtiExport::post_sampled_object_alloc; 2982 } 2983 } 2984 2985 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() { 2986 if (!_enable) { 2987 return; 2988 } 2989 2990 generate_call_for_allocated(); 2991 unset_jvmti_thread_state(); 2992 2993 // Unset the sampling collector as present in assertion mode only. 2994 assert(Thread::current()->is_Java_thread(), 2995 "Should always be in a Java thread"); 2996 } 2997 2998 JvmtiGCMarker::JvmtiGCMarker() { 2999 // if there aren't any JVMTI environments then nothing to do 3000 if (!JvmtiEnv::environments_might_exist()) { 3001 return; 3002 } 3003 3004 if (JvmtiExport::should_post_garbage_collection_start()) { 3005 JvmtiExport::post_garbage_collection_start(); 3006 } 3007 3008 if (SafepointSynchronize::is_at_safepoint()) { 3009 // Do clean up tasks that need to be done at a safepoint 3010 JvmtiEnvBase::check_for_periodic_clean_up(); 3011 } 3012 } 3013 3014 JvmtiGCMarker::~JvmtiGCMarker() { 3015 // if there aren't any JVMTI environments then nothing to do 3016 if (!JvmtiEnv::environments_might_exist()) { 3017 return; 3018 } 3019 3020 // JVMTI notify gc finish 3021 if (JvmtiExport::should_post_garbage_collection_finish()) { 3022 JvmtiExport::post_garbage_collection_finish(); 3023 } 3024 }