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/moduleEntry.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "code/nmethod.hpp" 30 #include "code/pcDesc.hpp" 31 #include "code/scopeDesc.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "jvmtifiles/jvmtiEnv.hpp" 34 #include "logging/log.hpp" 35 #include "logging/logStream.hpp" 36 #include "memory/allocation.inline.hpp" 37 #include "memory/resourceArea.hpp" 38 #include "memory/universe.hpp" 39 #include "oops/objArrayKlass.hpp" 40 #include "oops/objArrayOop.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "prims/jvmtiCodeBlobEvents.hpp" 43 #include "prims/jvmtiEventController.hpp" 44 #include "prims/jvmtiEventController.inline.hpp" 45 #include "prims/jvmtiExport.hpp" 46 #include "prims/jvmtiImpl.hpp" 47 #include "prims/jvmtiManageCapabilities.hpp" 48 #include "prims/jvmtiRawMonitor.hpp" 49 #include "prims/jvmtiRedefineClasses.hpp" 50 #include "prims/jvmtiTagMap.hpp" 51 #include "prims/jvmtiThreadState.inline.hpp" 52 #include "runtime/arguments.hpp" 53 #include "runtime/fieldDescriptor.inline.hpp" 54 #include "runtime/handles.inline.hpp" 55 #include "runtime/interfaceSupport.inline.hpp" 56 #include "runtime/javaCalls.hpp" 57 #include "runtime/jniHandles.inline.hpp" 58 #include "runtime/objectMonitor.hpp" 59 #include "runtime/objectMonitor.inline.hpp" 60 #include "runtime/os.inline.hpp" 61 #include "runtime/safepointVerifiers.hpp" 62 #include "runtime/thread.inline.hpp" 63 #include "runtime/threadSMR.hpp" 64 #include "runtime/vframe.inline.hpp" 65 #include "utilities/macros.hpp" 66 67 #ifdef JVMTI_TRACE 68 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 69 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; } 70 #else 71 #define EVT_TRIG_TRACE(evt,out) 72 #define EVT_TRACE(evt,out) 73 #endif 74 75 /////////////////////////////////////////////////////////////// 76 // 77 // JvmtiEventTransition 78 // 79 // TO DO -- 80 // more handle purging 81 82 // Use this for JavaThreads and state is _thread_in_vm. 83 class JvmtiJavaThreadEventTransition : StackObj { 84 private: 85 ResourceMark _rm; 86 ThreadToNativeFromVM _transition; 87 HandleMark _hm; 88 89 public: 90 JvmtiJavaThreadEventTransition(JavaThread *thread) : 91 _rm(), 92 _transition(thread), 93 _hm(thread) {}; 94 }; 95 96 // For JavaThreads which are not in _thread_in_vm state 97 // and other system threads use this. 98 class JvmtiThreadEventTransition : StackObj { 99 private: 100 ResourceMark _rm; 101 HandleMark _hm; 102 JavaThreadState _saved_state; 103 JavaThread *_jthread; 104 105 public: 106 JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { 107 if (thread->is_Java_thread()) { 108 _jthread = (JavaThread *)thread; 109 _saved_state = _jthread->thread_state(); 110 if (_saved_state == _thread_in_Java) { 111 ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 112 } else { 113 ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 114 } 115 } else { 116 _jthread = NULL; 117 } 118 } 119 120 ~JvmtiThreadEventTransition() { 121 if (_jthread != NULL) 122 ThreadStateTransition::transition_from_native(_jthread, _saved_state); 123 } 124 }; 125 126 127 /////////////////////////////////////////////////////////////// 128 // 129 // JvmtiEventMark 130 // 131 132 class JvmtiEventMark : public StackObj { 133 private: 134 JavaThread *_thread; 135 JNIEnv* _jni_env; 136 JvmtiThreadState::ExceptionState _saved_exception_state; 137 #if 0 138 JNIHandleBlock* _hblock; 139 #endif 140 141 public: 142 JvmtiEventMark(JavaThread *thread) : _thread(thread), 143 _jni_env(thread->jni_environment()), 144 _saved_exception_state(JvmtiThreadState::ES_CLEARED) { 145 #if 0 146 _hblock = thread->active_handles(); 147 _hblock->clear_thoroughly(); // so we can be safe 148 #else 149 // we want to use the code above - but that needs the JNIHandle changes - later... 150 // for now, steal JNI push local frame code 151 JvmtiThreadState *state = thread->jvmti_thread_state(); 152 // we are before an event. 153 // Save current jvmti thread exception state. 154 if (state != NULL) { 155 _saved_exception_state = state->get_exception_state(); 156 } 157 158 JNIHandleBlock* old_handles = thread->active_handles(); 159 JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 160 assert(new_handles != NULL, "should not be NULL"); 161 new_handles->set_pop_frame_link(old_handles); 162 thread->set_active_handles(new_handles); 163 #endif 164 assert(thread == JavaThread::current(), "thread must be current!"); 165 thread->frame_anchor()->make_walkable(thread); 166 }; 167 168 ~JvmtiEventMark() { 169 #if 0 170 _hblock->clear(); // for consistency with future correct behavior 171 #else 172 // we want to use the code above - but that needs the JNIHandle changes - later... 173 // for now, steal JNI pop local frame code 174 JNIHandleBlock* old_handles = _thread->active_handles(); 175 JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 176 assert(new_handles != NULL, "should not be NULL"); 177 _thread->set_active_handles(new_handles); 178 // Note that we set the pop_frame_link to NULL explicitly, otherwise 179 // the release_block call will release the blocks. 180 old_handles->set_pop_frame_link(NULL); 181 JNIHandleBlock::release_block(old_handles, _thread); // may block 182 #endif 183 184 JvmtiThreadState* state = _thread->jvmti_thread_state(); 185 // we are continuing after an event. 186 if (state != NULL) { 187 // Restore the jvmti thread exception state. 188 state->restore_exception_state(_saved_exception_state); 189 } 190 } 191 192 #if 0 193 jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 194 #else 195 // we want to use the code above - but that needs the JNIHandle changes - later... 196 // for now, use regular make_local 197 jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 198 #endif 199 200 jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); } 201 202 jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); } 203 204 JNIEnv* jni_env() { return _jni_env; } 205 }; 206 207 class JvmtiThreadEventMark : public JvmtiEventMark { 208 private: 209 jthread _jt; 210 211 public: 212 JvmtiThreadEventMark(JavaThread *thread) : 213 JvmtiEventMark(thread) { 214 _jt = (jthread)(to_jobject(thread->threadObj())); 215 }; 216 jthread jni_thread() { return _jt; } 217 }; 218 219 class JvmtiClassEventMark : public JvmtiThreadEventMark { 220 private: 221 jclass _jc; 222 223 public: 224 JvmtiClassEventMark(JavaThread *thread, Klass* klass) : 225 JvmtiThreadEventMark(thread) { 226 _jc = to_jclass(klass); 227 }; 228 jclass jni_class() { return _jc; } 229 }; 230 231 class JvmtiMethodEventMark : public JvmtiThreadEventMark { 232 private: 233 jmethodID _mid; 234 235 public: 236 JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) : 237 JvmtiThreadEventMark(thread), 238 _mid(to_jmethodID(method)) {}; 239 jmethodID jni_methodID() { return _mid; } 240 }; 241 242 class JvmtiLocationEventMark : public JvmtiMethodEventMark { 243 private: 244 jlocation _loc; 245 246 public: 247 JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) : 248 JvmtiMethodEventMark(thread, method), 249 _loc(location - method->code_base()) {}; 250 jlocation location() { return _loc; } 251 }; 252 253 class JvmtiExceptionEventMark : public JvmtiLocationEventMark { 254 private: 255 jobject _exc; 256 257 public: 258 JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) : 259 JvmtiLocationEventMark(thread, method, location), 260 _exc(to_jobject(exception())) {}; 261 jobject exception() { return _exc; } 262 }; 263 264 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 265 private: 266 const char *_class_name; 267 jobject _jloader; 268 jobject _protection_domain; 269 jclass _class_being_redefined; 270 271 public: 272 JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 273 Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) { 274 _class_name = name != NULL? name->as_utf8() : NULL; 275 _jloader = (jobject)to_jobject(class_loader()); 276 _protection_domain = (jobject)to_jobject(prot_domain()); 277 if (class_being_redefined == NULL) { 278 _class_being_redefined = NULL; 279 } else { 280 _class_being_redefined = (jclass)to_jclass(class_being_redefined); 281 } 282 }; 283 const char *class_name() { 284 return _class_name; 285 } 286 jobject jloader() { 287 return _jloader; 288 } 289 jobject protection_domain() { 290 return _protection_domain; 291 } 292 jclass class_being_redefined() { 293 return _class_being_redefined; 294 } 295 }; 296 297 ////////////////////////////////////////////////////////////////////////////// 298 299 int JvmtiExport::_field_access_count = 0; 300 int JvmtiExport::_field_modification_count = 0; 301 302 bool JvmtiExport::_can_access_local_variables = false; 303 bool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 304 bool JvmtiExport::_can_modify_any_class = false; 305 bool JvmtiExport::_can_walk_any_space = false; 306 307 bool JvmtiExport::_has_redefined_a_class = false; 308 bool JvmtiExport::_all_dependencies_are_recorded = false; 309 310 // 311 // field access management 312 // 313 314 // interpreter generator needs the address of the counter 315 address JvmtiExport::get_field_access_count_addr() { 316 // We don't grab a lock because we don't want to 317 // serialize field access between all threads. This means that a 318 // thread on another processor can see the wrong count value and 319 // may either miss making a needed call into post_field_access() 320 // or will make an unneeded call into post_field_access(). We pay 321 // this price to avoid slowing down the VM when we aren't watching 322 // field accesses. 323 // Other access/mutation safe by virtue of being in VM state. 324 return (address)(&_field_access_count); 325 } 326 327 // 328 // field modification management 329 // 330 331 // interpreter generator needs the address of the counter 332 address JvmtiExport::get_field_modification_count_addr() { 333 // We don't grab a lock because we don't 334 // want to serialize field modification between all threads. This 335 // means that a thread on another processor can see the wrong 336 // count value and may either miss making a needed call into 337 // post_field_modification() or will make an unneeded call into 338 // post_field_modification(). We pay this price to avoid slowing 339 // down the VM when we aren't watching field modifications. 340 // Other access/mutation safe by virtue of being in VM state. 341 return (address)(&_field_modification_count); 342 } 343 344 345 /////////////////////////////////////////////////////////////// 346 // Functions needed by java.lang.instrument for starting up javaagent. 347 /////////////////////////////////////////////////////////////// 348 349 jint 350 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 351 // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 352 // has already been validated in JNI GetEnv(). 353 int major, minor, micro; 354 355 // micro version doesn't matter here (yet?) 356 decode_version_values(version, &major, &minor, µ); 357 switch (major) { 358 case 1: 359 switch (minor) { 360 case 0: // version 1.0.<micro> is recognized 361 case 1: // version 1.1.<micro> is recognized 362 case 2: // version 1.2.<micro> is recognized 363 break; 364 365 default: 366 return JNI_EVERSION; // unsupported minor version number 367 } 368 break; 369 case 9: 370 switch (minor) { 371 case 0: // version 9.0.<micro> is recognized 372 break; 373 default: 374 return JNI_EVERSION; // unsupported minor version number 375 } 376 break; 377 case 11: 378 switch (minor) { 379 case 0: // version 11.0.<micro> is recognized 380 break; 381 default: 382 return JNI_EVERSION; // unsupported minor version number 383 } 384 break; 385 default: 386 // Starting from 13 we do not care about minor version anymore 387 if (major < 13 || major > Abstract_VM_Version::vm_major_version()) { 388 return JNI_EVERSION; // unsupported major version number 389 } 390 } 391 392 if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 393 JavaThread* current_thread = JavaThread::current(); 394 // transition code: native to VM 395 ThreadInVMfromNative __tiv(current_thread); 396 VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 397 debug_only(VMNativeEntryWrapper __vew;) 398 399 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 400 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 401 return JNI_OK; 402 403 } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 404 // not live, no thread to transition 405 JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 406 *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 407 return JNI_OK; 408 409 } else { 410 // Called at the wrong time 411 *penv = NULL; 412 return JNI_EDETACHED; 413 } 414 } 415 416 void 417 JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) { 418 if (!Universe::is_module_initialized()) { 419 return; // extra safety 420 } 421 assert(!h_module.is_null(), "module should always be set"); 422 423 // Invoke the transformedByAgent method 424 JavaValue result(T_VOID); 425 JavaCalls::call_static(&result, 426 SystemDictionary::module_Modules_klass(), 427 vmSymbols::transformedByAgent_name(), 428 vmSymbols::transformedByAgent_signature(), 429 h_module, 430 THREAD); 431 432 if (HAS_PENDING_EXCEPTION) { 433 LogTarget(Trace, jvmti) log; 434 LogStream log_stream(log); 435 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 436 log_stream.cr(); 437 CLEAR_PENDING_EXCEPTION; 438 return; 439 } 440 } 441 442 jvmtiError 443 JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) { 444 if (!Universe::is_module_initialized()) { 445 return JVMTI_ERROR_NONE; // extra safety 446 } 447 assert(!module.is_null(), "module should always be set"); 448 assert(!to_module.is_null(), "to_module should always be set"); 449 450 // Invoke the addReads method 451 JavaValue result(T_VOID); 452 JavaCalls::call_static(&result, 453 SystemDictionary::module_Modules_klass(), 454 vmSymbols::addReads_name(), 455 vmSymbols::addReads_signature(), 456 module, 457 to_module, 458 THREAD); 459 460 if (HAS_PENDING_EXCEPTION) { 461 LogTarget(Trace, jvmti) log; 462 LogStream log_stream(log); 463 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 464 log_stream.cr(); 465 CLEAR_PENDING_EXCEPTION; 466 return JVMTI_ERROR_INTERNAL; 467 } 468 return JVMTI_ERROR_NONE; 469 } 470 471 jvmtiError 472 JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 473 if (!Universe::is_module_initialized()) { 474 return JVMTI_ERROR_NONE; // extra safety 475 } 476 assert(!module.is_null(), "module should always be set"); 477 assert(!to_module.is_null(), "to_module should always be set"); 478 assert(!pkg_name.is_null(), "pkg_name should always be set"); 479 480 // Invoke the addExports method 481 JavaValue result(T_VOID); 482 JavaCalls::call_static(&result, 483 SystemDictionary::module_Modules_klass(), 484 vmSymbols::addExports_name(), 485 vmSymbols::addExports_signature(), 486 module, 487 pkg_name, 488 to_module, 489 THREAD); 490 491 if (HAS_PENDING_EXCEPTION) { 492 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 493 LogTarget(Trace, jvmti) log; 494 LogStream log_stream(log); 495 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 496 log_stream.cr(); 497 CLEAR_PENDING_EXCEPTION; 498 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 499 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 500 } 501 return JVMTI_ERROR_INTERNAL; 502 } 503 return JVMTI_ERROR_NONE; 504 } 505 506 jvmtiError 507 JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) { 508 if (!Universe::is_module_initialized()) { 509 return JVMTI_ERROR_NONE; // extra safety 510 } 511 assert(!module.is_null(), "module should always be set"); 512 assert(!to_module.is_null(), "to_module should always be set"); 513 assert(!pkg_name.is_null(), "pkg_name should always be set"); 514 515 // Invoke the addOpens method 516 JavaValue result(T_VOID); 517 JavaCalls::call_static(&result, 518 SystemDictionary::module_Modules_klass(), 519 vmSymbols::addOpens_name(), 520 vmSymbols::addExports_signature(), 521 module, 522 pkg_name, 523 to_module, 524 THREAD); 525 526 if (HAS_PENDING_EXCEPTION) { 527 Symbol* ex_name = PENDING_EXCEPTION->klass()->name(); 528 LogTarget(Trace, jvmti) log; 529 LogStream log_stream(log); 530 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 531 log_stream.cr(); 532 CLEAR_PENDING_EXCEPTION; 533 if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) { 534 return JVMTI_ERROR_ILLEGAL_ARGUMENT; 535 } 536 return JVMTI_ERROR_INTERNAL; 537 } 538 return JVMTI_ERROR_NONE; 539 } 540 541 jvmtiError 542 JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) { 543 if (!Universe::is_module_initialized()) { 544 return JVMTI_ERROR_NONE; // extra safety 545 } 546 assert(!module.is_null(), "module should always be set"); 547 assert(!service.is_null(), "service should always be set"); 548 549 // Invoke the addUses method 550 JavaValue result(T_VOID); 551 JavaCalls::call_static(&result, 552 SystemDictionary::module_Modules_klass(), 553 vmSymbols::addUses_name(), 554 vmSymbols::addUses_signature(), 555 module, 556 service, 557 THREAD); 558 559 if (HAS_PENDING_EXCEPTION) { 560 LogTarget(Trace, jvmti) log; 561 LogStream log_stream(log); 562 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 563 log_stream.cr(); 564 CLEAR_PENDING_EXCEPTION; 565 return JVMTI_ERROR_INTERNAL; 566 } 567 return JVMTI_ERROR_NONE; 568 } 569 570 jvmtiError 571 JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) { 572 if (!Universe::is_module_initialized()) { 573 return JVMTI_ERROR_NONE; // extra safety 574 } 575 assert(!module.is_null(), "module should always be set"); 576 assert(!service.is_null(), "service should always be set"); 577 assert(!impl_class.is_null(), "impl_class should always be set"); 578 579 // Invoke the addProvides method 580 JavaValue result(T_VOID); 581 JavaCalls::call_static(&result, 582 SystemDictionary::module_Modules_klass(), 583 vmSymbols::addProvides_name(), 584 vmSymbols::addProvides_signature(), 585 module, 586 service, 587 impl_class, 588 THREAD); 589 590 if (HAS_PENDING_EXCEPTION) { 591 LogTarget(Trace, jvmti) log; 592 LogStream log_stream(log); 593 java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream); 594 log_stream.cr(); 595 CLEAR_PENDING_EXCEPTION; 596 return JVMTI_ERROR_INTERNAL; 597 } 598 return JVMTI_ERROR_NONE; 599 } 600 601 void 602 JvmtiExport::decode_version_values(jint version, int * major, int * minor, 603 int * micro) { 604 *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 605 *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 606 *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 607 } 608 609 void JvmtiExport::enter_primordial_phase() { 610 JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 611 } 612 613 void JvmtiExport::enter_early_start_phase() { 614 set_early_vmstart_recorded(true); 615 } 616 617 void JvmtiExport::enter_start_phase() { 618 JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 619 } 620 621 void JvmtiExport::enter_onload_phase() { 622 JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 623 } 624 625 void JvmtiExport::enter_live_phase() { 626 JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 627 } 628 629 // 630 // JVMTI events that the VM posts to the debugger and also startup agent 631 // and call the agent's premain() for java.lang.instrument. 632 // 633 634 void JvmtiExport::post_early_vm_start() { 635 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" )); 636 637 // can now enable some events 638 JvmtiEventController::vm_start(); 639 640 JvmtiEnvIterator it; 641 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 642 // Only early vmstart envs post early VMStart event 643 if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 644 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" )); 645 JavaThread *thread = JavaThread::current(); 646 JvmtiThreadEventMark jem(thread); 647 JvmtiJavaThreadEventTransition jet(thread); 648 jvmtiEventVMStart callback = env->callbacks()->VMStart; 649 if (callback != NULL) { 650 (*callback)(env->jvmti_external(), jem.jni_env()); 651 } 652 } 653 } 654 } 655 656 void JvmtiExport::post_vm_start() { 657 EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" )); 658 659 // can now enable some events 660 JvmtiEventController::vm_start(); 661 662 JvmtiEnvIterator it; 663 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 664 // Early vmstart envs do not post normal VMStart event 665 if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) { 666 EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" )); 667 668 JavaThread *thread = JavaThread::current(); 669 JvmtiThreadEventMark jem(thread); 670 JvmtiJavaThreadEventTransition jet(thread); 671 jvmtiEventVMStart callback = env->callbacks()->VMStart; 672 if (callback != NULL) { 673 (*callback)(env->jvmti_external(), jem.jni_env()); 674 } 675 } 676 } 677 } 678 679 680 void JvmtiExport::post_vm_initialized() { 681 EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" )); 682 683 // can now enable events 684 JvmtiEventController::vm_init(); 685 686 JvmtiEnvIterator it; 687 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 688 if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 689 EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" )); 690 691 JavaThread *thread = JavaThread::current(); 692 JvmtiThreadEventMark jem(thread); 693 JvmtiJavaThreadEventTransition jet(thread); 694 jvmtiEventVMInit callback = env->callbacks()->VMInit; 695 if (callback != NULL) { 696 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 697 } 698 } 699 } 700 } 701 702 703 void JvmtiExport::post_vm_death() { 704 EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" )); 705 706 JvmtiEnvIterator it; 707 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 708 if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 709 EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" )); 710 711 JavaThread *thread = JavaThread::current(); 712 JvmtiEventMark jem(thread); 713 JvmtiJavaThreadEventTransition jet(thread); 714 jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 715 if (callback != NULL) { 716 (*callback)(env->jvmti_external(), jem.jni_env()); 717 } 718 } 719 } 720 721 JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 722 JvmtiEventController::vm_death(); 723 } 724 725 char** 726 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 727 // Have to grab JVMTI thread state lock to be sure environment doesn't 728 // go away while we iterate them. No locks during VM bring-up. 729 if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 730 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 731 } else { 732 MutexLocker mu(JvmtiThreadState_lock); 733 return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 734 } 735 } 736 737 // Convert an external thread reference to a JavaThread found on the 738 // specified ThreadsList. The ThreadsListHandle in the caller "protects" 739 // the returned JavaThread *. 740 // 741 // If thread_oop_p is not NULL, then the caller wants to use the oop 742 // after this call so the oop is returned. On success, *jt_pp is set 743 // to the converted JavaThread * and JVMTI_ERROR_NONE is returned. 744 // On error, returns various JVMTI_ERROR_* values. 745 // 746 jvmtiError 747 JvmtiExport::cv_external_thread_to_JavaThread(ThreadsList * t_list, 748 jthread thread, 749 JavaThread ** jt_pp, 750 oop * thread_oop_p) { 751 assert(t_list != NULL, "must have a ThreadsList"); 752 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 753 // thread_oop_p is optional so no assert() 754 755 oop thread_oop = JNIHandles::resolve_external_guard(thread); 756 if (thread_oop == NULL) { 757 // NULL jthread, GC'ed jthread or a bad JNI handle. 758 return JVMTI_ERROR_INVALID_THREAD; 759 } 760 // Looks like an oop at this point. 761 762 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 763 // The oop is not a java.lang.Thread. 764 return JVMTI_ERROR_INVALID_THREAD; 765 } 766 // Looks like a java.lang.Thread oop at this point. 767 768 if (thread_oop_p != NULL) { 769 // Return the oop to the caller; the caller may still want 770 // the oop even if this function returns an error. 771 *thread_oop_p = thread_oop; 772 } 773 774 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 775 if (java_thread == NULL) { 776 // The java.lang.Thread does not contain a JavaThread * so it has 777 // not yet run or it has died. 778 return JVMTI_ERROR_THREAD_NOT_ALIVE; 779 } 780 // Looks like a live JavaThread at this point. 781 782 // We do not check the EnableThreadSMRExtraValidityChecks option 783 // for this includes() call because JVM/TI's spec is tighter. 784 if (!t_list->includes(java_thread)) { 785 // Not on the JavaThreads list so it is not alive. 786 return JVMTI_ERROR_THREAD_NOT_ALIVE; 787 } 788 789 // Return a live JavaThread that is "protected" by the 790 // ThreadsListHandle in the caller. 791 *jt_pp = java_thread; 792 793 return JVMTI_ERROR_NONE; 794 } 795 796 // Convert an oop to a JavaThread found on the specified ThreadsList. 797 // The ThreadsListHandle in the caller "protects" the returned 798 // JavaThread *. 799 // 800 // On success, *jt_pp is set to the converted JavaThread * and 801 // JVMTI_ERROR_NONE is returned. On error, returns various 802 // JVMTI_ERROR_* values. 803 // 804 jvmtiError 805 JvmtiExport::cv_oop_to_JavaThread(ThreadsList * t_list, oop thread_oop, 806 JavaThread ** jt_pp) { 807 assert(t_list != NULL, "must have a ThreadsList"); 808 assert(thread_oop != NULL, "must have an oop"); 809 assert(jt_pp != NULL, "must have a return JavaThread pointer"); 810 811 if (!thread_oop->is_a(SystemDictionary::Thread_klass())) { 812 // The oop is not a java.lang.Thread. 813 return JVMTI_ERROR_INVALID_THREAD; 814 } 815 // Looks like a java.lang.Thread oop at this point. 816 817 JavaThread * java_thread = java_lang_Thread::thread(thread_oop); 818 if (java_thread == NULL) { 819 // The java.lang.Thread does not contain a JavaThread * so it has 820 // not yet run or it has died. 821 return JVMTI_ERROR_THREAD_NOT_ALIVE; 822 } 823 // Looks like a live JavaThread at this point. 824 825 // We do not check the EnableThreadSMRExtraValidityChecks option 826 // for this includes() call because JVM/TI's spec is tighter. 827 if (!t_list->includes(java_thread)) { 828 // Not on the JavaThreads list so it is not alive. 829 return JVMTI_ERROR_THREAD_NOT_ALIVE; 830 } 831 832 // Return a live JavaThread that is "protected" by the 833 // ThreadsListHandle in the caller. 834 *jt_pp = java_thread; 835 836 return JVMTI_ERROR_NONE; 837 } 838 839 class JvmtiClassFileLoadHookPoster : public StackObj { 840 private: 841 Symbol* _h_name; 842 Handle _class_loader; 843 Handle _h_protection_domain; 844 unsigned char ** _data_ptr; 845 unsigned char ** _end_ptr; 846 JavaThread * _thread; 847 jint _curr_len; 848 unsigned char * _curr_data; 849 JvmtiEnv * _curr_env; 850 JvmtiCachedClassFileData ** _cached_class_file_ptr; 851 JvmtiThreadState * _state; 852 Klass* _class_being_redefined; 853 JvmtiClassLoadKind _load_kind; 854 bool _has_been_modified; 855 856 public: 857 inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 858 Handle h_protection_domain, 859 unsigned char **data_ptr, unsigned char **end_ptr, 860 JvmtiCachedClassFileData **cache_ptr) { 861 _h_name = h_name; 862 _class_loader = class_loader; 863 _h_protection_domain = h_protection_domain; 864 _data_ptr = data_ptr; 865 _end_ptr = end_ptr; 866 _thread = JavaThread::current(); 867 _curr_len = *end_ptr - *data_ptr; 868 _curr_data = *data_ptr; 869 _curr_env = NULL; 870 _cached_class_file_ptr = cache_ptr; 871 _has_been_modified = false; 872 873 _state = _thread->jvmti_thread_state(); 874 if (_state != NULL) { 875 _class_being_redefined = _state->get_class_being_redefined(); 876 _load_kind = _state->get_class_load_kind(); 877 Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined; 878 if (_load_kind != jvmti_class_load_kind_load && klass != NULL) { 879 ModuleEntry* module_entry = InstanceKlass::cast(klass)->module(); 880 assert(module_entry != NULL, "module_entry should always be set"); 881 if (module_entry->is_named() && 882 module_entry->module() != NULL && 883 !module_entry->has_default_read_edges()) { 884 if (!module_entry->set_has_default_read_edges()) { 885 // We won a potential race. 886 // Add read edges to the unnamed modules of the bootstrap and app class loaders 887 Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module 888 JvmtiExport::add_default_read_edges(class_module, _thread); 889 } 890 } 891 } 892 // Clear class_being_redefined flag here. The action 893 // from agent handler could generate a new class file load 894 // hook event and if it is not cleared the new event generated 895 // from regular class file load could have this stale redefined 896 // class handle info. 897 _state->clear_class_being_redefined(); 898 } else { 899 // redefine and retransform will always set the thread state 900 _class_being_redefined = NULL; 901 _load_kind = jvmti_class_load_kind_load; 902 } 903 } 904 905 void post() { 906 post_all_envs(); 907 copy_modified_data(); 908 } 909 910 bool has_been_modified() { return _has_been_modified; } 911 912 private: 913 void post_all_envs() { 914 if (_load_kind != jvmti_class_load_kind_retransform) { 915 // for class load and redefine, 916 // call the non-retransformable agents 917 JvmtiEnvIterator it; 918 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 919 if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 920 // non-retransformable agents cannot retransform back, 921 // so no need to cache the original class file bytes 922 post_to_env(env, false); 923 } 924 } 925 } 926 JvmtiEnvIterator it; 927 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 928 // retransformable agents get all events 929 if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 930 // retransformable agents need to cache the original class file 931 // bytes if changes are made via the ClassFileLoadHook 932 post_to_env(env, true); 933 } 934 } 935 } 936 937 void post_to_env(JvmtiEnv* env, bool caching_needed) { 938 if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) { 939 return; 940 } 941 unsigned char *new_data = NULL; 942 jint new_len = 0; 943 JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 944 _h_protection_domain, 945 _class_being_redefined); 946 JvmtiJavaThreadEventTransition jet(_thread); 947 jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 948 if (callback != NULL) { 949 (*callback)(env->jvmti_external(), jem.jni_env(), 950 jem.class_being_redefined(), 951 jem.jloader(), jem.class_name(), 952 jem.protection_domain(), 953 _curr_len, _curr_data, 954 &new_len, &new_data); 955 } 956 if (new_data != NULL) { 957 // this agent has modified class data. 958 _has_been_modified = true; 959 if (caching_needed && *_cached_class_file_ptr == NULL) { 960 // data has been changed by the new retransformable agent 961 // and it hasn't already been cached, cache it 962 JvmtiCachedClassFileData *p; 963 p = (JvmtiCachedClassFileData *)os::malloc( 964 offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal); 965 if (p == NULL) { 966 vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len, 967 OOM_MALLOC_ERROR, 968 "unable to allocate cached copy of original class bytes"); 969 } 970 p->length = _curr_len; 971 memcpy(p->data, _curr_data, _curr_len); 972 *_cached_class_file_ptr = p; 973 } 974 975 if (_curr_data != *_data_ptr) { 976 // curr_data is previous agent modified class data. 977 // And this has been changed by the new agent so 978 // we can delete it now. 979 _curr_env->Deallocate(_curr_data); 980 } 981 982 // Class file data has changed by the current agent. 983 _curr_data = new_data; 984 _curr_len = new_len; 985 // Save the current agent env we need this to deallocate the 986 // memory allocated by this agent. 987 _curr_env = env; 988 } 989 } 990 991 void copy_modified_data() { 992 // if one of the agent has modified class file data. 993 // Copy modified class data to new resources array. 994 if (_curr_data != *_data_ptr) { 995 *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 996 memcpy(*_data_ptr, _curr_data, _curr_len); 997 *_end_ptr = *_data_ptr + _curr_len; 998 _curr_env->Deallocate(_curr_data); 999 } 1000 } 1001 }; 1002 1003 bool JvmtiExport::is_early_phase() { 1004 return JvmtiEnvBase::get_phase() <= JVMTI_PHASE_PRIMORDIAL; 1005 } 1006 1007 bool JvmtiExport::has_early_class_hook_env() { 1008 JvmtiEnvIterator it; 1009 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1010 if (env->early_class_hook_env()) { 1011 return true; 1012 } 1013 } 1014 return false; 1015 } 1016 1017 bool JvmtiExport::_should_post_class_file_load_hook = false; 1018 1019 // this entry is for class file load hook on class load, redefine and retransform 1020 bool JvmtiExport::post_class_file_load_hook(Symbol* h_name, 1021 Handle class_loader, 1022 Handle h_protection_domain, 1023 unsigned char **data_ptr, 1024 unsigned char **end_ptr, 1025 JvmtiCachedClassFileData **cache_ptr) { 1026 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1027 return false; 1028 } 1029 1030 JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 1031 h_protection_domain, 1032 data_ptr, end_ptr, 1033 cache_ptr); 1034 poster.post(); 1035 return poster.has_been_modified(); 1036 } 1037 1038 void JvmtiExport::report_unsupported(bool on) { 1039 // If any JVMTI service is turned on, we need to exit before native code 1040 // tries to access nonexistant services. 1041 if (on) { 1042 vm_exit_during_initialization("Java Kernel does not support JVMTI."); 1043 } 1044 } 1045 1046 1047 static inline Klass* oop_to_klass(oop obj) { 1048 Klass* k = obj->klass(); 1049 1050 // if the object is a java.lang.Class then return the java mirror 1051 if (k == SystemDictionary::Class_klass()) { 1052 if (!java_lang_Class::is_primitive(obj)) { 1053 k = java_lang_Class::as_Klass(obj); 1054 assert(k != NULL, "class for non-primitive mirror must exist"); 1055 } 1056 } 1057 return k; 1058 } 1059 1060 class JvmtiObjectAllocEventMark : public JvmtiClassEventMark { 1061 private: 1062 jobject _jobj; 1063 jlong _size; 1064 public: 1065 JvmtiObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) { 1066 _jobj = (jobject)to_jobject(obj); 1067 _size = Universe::heap()->obj_size(obj) * wordSize; 1068 }; 1069 jobject jni_jobject() { return _jobj; } 1070 jlong size() { return _size; } 1071 }; 1072 1073 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 1074 private: 1075 jint _code_size; 1076 const void *_code_data; 1077 jint _map_length; 1078 jvmtiAddrLocationMap *_map; 1079 const void *_compile_info; 1080 public: 1081 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 1082 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 1083 _code_data = nm->insts_begin(); 1084 _code_size = nm->insts_size(); 1085 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 1086 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 1087 } 1088 ~JvmtiCompiledMethodLoadEventMark() { 1089 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map); 1090 } 1091 1092 jint code_size() { return _code_size; } 1093 const void *code_data() { return _code_data; } 1094 jint map_length() { return _map_length; } 1095 const jvmtiAddrLocationMap* map() { return _map; } 1096 const void *compile_info() { return _compile_info; } 1097 }; 1098 1099 1100 1101 class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 1102 private: 1103 jobject _jobj; 1104 public: 1105 JvmtiMonitorEventMark(JavaThread *thread, oop object) 1106 : JvmtiThreadEventMark(thread){ 1107 _jobj = to_jobject(object); 1108 } 1109 jobject jni_object() { return _jobj; } 1110 }; 1111 1112 /////////////////////////////////////////////////////////////// 1113 // 1114 // pending CompiledMethodUnload support 1115 // 1116 1117 void JvmtiExport::post_compiled_method_unload( 1118 jmethodID method, const void *code_begin) { 1119 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1120 return; 1121 } 1122 JavaThread* thread = JavaThread::current(); 1123 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1124 ("[%s] method compile unload event triggered", 1125 JvmtiTrace::safe_get_thread_name(thread))); 1126 1127 // post the event for each environment that has this event enabled. 1128 JvmtiEnvIterator it; 1129 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1130 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 1131 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1132 continue; 1133 } 1134 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 1135 ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT, 1136 JvmtiTrace::safe_get_thread_name(thread), p2i(method))); 1137 1138 ResourceMark rm(thread); 1139 1140 JvmtiEventMark jem(thread); 1141 JvmtiJavaThreadEventTransition jet(thread); 1142 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 1143 if (callback != NULL) { 1144 (*callback)(env->jvmti_external(), method, code_begin); 1145 } 1146 } 1147 } 1148 } 1149 1150 /////////////////////////////////////////////////////////////// 1151 // 1152 // JvmtiExport 1153 // 1154 1155 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) { 1156 HandleMark hm(thread); 1157 methodHandle mh(thread, method); 1158 1159 JvmtiThreadState *state = thread->jvmti_thread_state(); 1160 if (state == NULL) { 1161 return; 1162 } 1163 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered", 1164 JvmtiTrace::safe_get_thread_name(thread))); 1165 JvmtiEnvThreadStateIterator it(state); 1166 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1167 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 1168 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 1169 ThreadState old_os_state = thread->osthread()->get_state(); 1170 thread->osthread()->set_state(BREAKPOINTED); 1171 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT, 1172 JvmtiTrace::safe_get_thread_name(thread), 1173 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1174 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1175 location - mh()->code_base() )); 1176 1177 JvmtiEnv *env = ets->get_env(); 1178 JvmtiLocationEventMark jem(thread, mh, location); 1179 JvmtiJavaThreadEventTransition jet(thread); 1180 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 1181 if (callback != NULL) { 1182 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1183 jem.jni_methodID(), jem.location()); 1184 } 1185 1186 ets->set_breakpoint_posted(); 1187 thread->osthread()->set_state(old_os_state); 1188 } 1189 } 1190 } 1191 1192 ////////////////////////////////////////////////////////////////////////////// 1193 1194 bool JvmtiExport::_can_get_source_debug_extension = false; 1195 bool JvmtiExport::_can_maintain_original_method_order = false; 1196 bool JvmtiExport::_can_post_interpreter_events = false; 1197 bool JvmtiExport::_can_post_on_exceptions = false; 1198 bool JvmtiExport::_can_post_breakpoint = false; 1199 bool JvmtiExport::_can_post_field_access = false; 1200 bool JvmtiExport::_can_post_field_modification = false; 1201 bool JvmtiExport::_can_post_method_entry = false; 1202 bool JvmtiExport::_can_post_method_exit = false; 1203 bool JvmtiExport::_can_pop_frame = false; 1204 bool JvmtiExport::_can_force_early_return = false; 1205 1206 bool JvmtiExport::_early_vmstart_recorded = false; 1207 1208 bool JvmtiExport::_should_post_single_step = false; 1209 bool JvmtiExport::_should_post_field_access = false; 1210 bool JvmtiExport::_should_post_field_modification = false; 1211 bool JvmtiExport::_should_post_class_load = false; 1212 bool JvmtiExport::_should_post_class_prepare = false; 1213 bool JvmtiExport::_should_post_class_unload = false; 1214 bool JvmtiExport::_should_post_thread_life = false; 1215 bool JvmtiExport::_should_clean_up_heap_objects = false; 1216 bool JvmtiExport::_should_post_native_method_bind = false; 1217 bool JvmtiExport::_should_post_dynamic_code_generated = false; 1218 bool JvmtiExport::_should_post_data_dump = false; 1219 bool JvmtiExport::_should_post_compiled_method_load = false; 1220 bool JvmtiExport::_should_post_compiled_method_unload = false; 1221 bool JvmtiExport::_should_post_monitor_contended_enter = false; 1222 bool JvmtiExport::_should_post_monitor_contended_entered = false; 1223 bool JvmtiExport::_should_post_monitor_wait = false; 1224 bool JvmtiExport::_should_post_monitor_waited = false; 1225 bool JvmtiExport::_should_post_garbage_collection_start = false; 1226 bool JvmtiExport::_should_post_garbage_collection_finish = false; 1227 bool JvmtiExport::_should_post_object_free = false; 1228 bool JvmtiExport::_should_post_resource_exhausted = false; 1229 bool JvmtiExport::_should_post_vm_object_alloc = false; 1230 bool JvmtiExport::_should_post_sampled_object_alloc = false; 1231 bool JvmtiExport::_should_post_on_exceptions = false; 1232 1233 //////////////////////////////////////////////////////////////////////////////////////////////// 1234 1235 1236 // 1237 // JVMTI single step management 1238 // 1239 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) { 1240 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 1241 1242 HandleMark hm(thread); 1243 methodHandle mh(thread, method); 1244 1245 // update information about current location and post a step event 1246 JvmtiThreadState *state = thread->jvmti_thread_state(); 1247 if (state == NULL) { 1248 return; 1249 } 1250 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered", 1251 JvmtiTrace::safe_get_thread_name(thread))); 1252 if (!state->hide_single_stepping()) { 1253 if (state->is_pending_step_for_popframe()) { 1254 state->process_pending_step_for_popframe(); 1255 } 1256 if (state->is_pending_step_for_earlyret()) { 1257 state->process_pending_step_for_earlyret(); 1258 } 1259 JvmtiExport::post_single_step(thread, mh(), location); 1260 } 1261 } 1262 1263 1264 void JvmtiExport::expose_single_stepping(JavaThread *thread) { 1265 JvmtiThreadState *state = thread->jvmti_thread_state(); 1266 if (state != NULL) { 1267 state->clear_hide_single_stepping(); 1268 } 1269 } 1270 1271 1272 bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 1273 JvmtiThreadState *state = thread->jvmti_thread_state(); 1274 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1275 state->set_hide_single_stepping(); 1276 return true; 1277 } else { 1278 return false; 1279 } 1280 } 1281 1282 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) { 1283 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1284 return; 1285 } 1286 HandleMark hm(thread); 1287 1288 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered", 1289 JvmtiTrace::safe_get_thread_name(thread))); 1290 JvmtiThreadState* state = thread->jvmti_thread_state(); 1291 if (state == NULL) { 1292 return; 1293 } 1294 JvmtiEnvThreadStateIterator it(state); 1295 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1296 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 1297 JvmtiEnv *env = ets->get_env(); 1298 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1299 continue; 1300 } 1301 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s", 1302 JvmtiTrace::safe_get_thread_name(thread), 1303 klass==NULL? "NULL" : klass->external_name() )); 1304 JvmtiClassEventMark jem(thread, klass); 1305 JvmtiJavaThreadEventTransition jet(thread); 1306 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 1307 if (callback != NULL) { 1308 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1309 } 1310 } 1311 } 1312 } 1313 1314 1315 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) { 1316 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1317 return; 1318 } 1319 HandleMark hm(thread); 1320 1321 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered", 1322 JvmtiTrace::safe_get_thread_name(thread))); 1323 JvmtiThreadState* state = thread->jvmti_thread_state(); 1324 if (state == NULL) { 1325 return; 1326 } 1327 JvmtiEnvThreadStateIterator it(state); 1328 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1329 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 1330 JvmtiEnv *env = ets->get_env(); 1331 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1332 continue; 1333 } 1334 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s", 1335 JvmtiTrace::safe_get_thread_name(thread), 1336 klass==NULL? "NULL" : klass->external_name() )); 1337 JvmtiClassEventMark jem(thread, klass); 1338 JvmtiJavaThreadEventTransition jet(thread); 1339 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 1340 if (callback != NULL) { 1341 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 1342 } 1343 } 1344 } 1345 } 1346 1347 void JvmtiExport::post_class_unload(Klass* klass) { 1348 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1349 return; 1350 } 1351 Thread *thread = Thread::current(); 1352 HandleMark hm(thread); 1353 1354 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" )); 1355 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1356 assert(thread->is_VM_thread(), "wrong thread"); 1357 1358 // get JavaThread for whom we are proxy 1359 Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread(); 1360 if (!calling_thread->is_Java_thread()) { 1361 // cannot post an event to a non-JavaThread 1362 return; 1363 } 1364 JavaThread *real_thread = (JavaThread *)calling_thread; 1365 1366 JvmtiEnvIterator it; 1367 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1368 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1369 continue; 1370 } 1371 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 1372 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s", 1373 klass==NULL? "NULL" : klass->external_name() )); 1374 1375 // do everything manually, since this is a proxy - needs special care 1376 JNIEnv* jni_env = real_thread->jni_environment(); 1377 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); 1378 jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror()); 1379 1380 // Before we call the JVMTI agent, we have to set the state in the 1381 // thread for which we are proxying. 1382 JavaThreadState prev_state = real_thread->thread_state(); 1383 assert(((Thread *)real_thread)->is_ConcurrentGC_thread() || 1384 (real_thread->is_Java_thread() && prev_state == _thread_blocked), 1385 "should be ConcurrentGCThread or JavaThread at safepoint"); 1386 real_thread->set_thread_state(_thread_in_native); 1387 1388 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 1389 if (callback != NULL) { 1390 (*callback)(env->jvmti_external(), jni_env, jt, jk); 1391 } 1392 1393 assert(real_thread->thread_state() == _thread_in_native, 1394 "JavaThread should be in native"); 1395 real_thread->set_thread_state(prev_state); 1396 1397 JNIHandles::destroy_local(jk); 1398 JNIHandles::destroy_local(jt); 1399 } 1400 } 1401 } 1402 } 1403 1404 1405 void JvmtiExport::post_thread_start(JavaThread *thread) { 1406 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1407 return; 1408 } 1409 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1410 1411 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered", 1412 JvmtiTrace::safe_get_thread_name(thread))); 1413 1414 // do JVMTI thread initialization (if needed) 1415 JvmtiEventController::thread_started(thread); 1416 1417 // Do not post thread start event for hidden java thread. 1418 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1419 !thread->is_hidden_from_external_view()) { 1420 JvmtiEnvIterator it; 1421 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1422 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1423 continue; 1424 } 1425 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1426 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent", 1427 JvmtiTrace::safe_get_thread_name(thread) )); 1428 1429 JvmtiThreadEventMark jem(thread); 1430 JvmtiJavaThreadEventTransition jet(thread); 1431 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1432 if (callback != NULL) { 1433 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1434 } 1435 } 1436 } 1437 } 1438 } 1439 1440 1441 void JvmtiExport::post_thread_end(JavaThread *thread) { 1442 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 1443 return; 1444 } 1445 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered", 1446 JvmtiTrace::safe_get_thread_name(thread))); 1447 1448 JvmtiThreadState *state = thread->jvmti_thread_state(); 1449 if (state == NULL) { 1450 return; 1451 } 1452 1453 // Do not post thread end event for hidden java thread. 1454 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1455 !thread->is_hidden_from_external_view()) { 1456 1457 JvmtiEnvThreadStateIterator it(state); 1458 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1459 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1460 JvmtiEnv *env = ets->get_env(); 1461 if (env->phase() == JVMTI_PHASE_PRIMORDIAL) { 1462 continue; 1463 } 1464 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent", 1465 JvmtiTrace::safe_get_thread_name(thread) )); 1466 1467 JvmtiThreadEventMark jem(thread); 1468 JvmtiJavaThreadEventTransition jet(thread); 1469 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1470 if (callback != NULL) { 1471 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1472 } 1473 } 1474 } 1475 } 1476 } 1477 1478 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1479 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1480 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1481 1482 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" )); 1483 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent")); 1484 1485 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1486 if (callback != NULL) { 1487 (*callback)(env->jvmti_external(), tag); 1488 } 1489 } 1490 1491 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1492 1493 JavaThread *thread = JavaThread::current(); 1494 1495 // JDK-8213834: handlers of ResourceExhausted may attempt some analysis 1496 // which often requires running java. 1497 // This will cause problems on threads not able to run java, e.g. compiler 1498 // threads. To forestall these problems, we therefore suppress sending this 1499 // event from threads which are not able to run java. 1500 if (!thread->can_call_java()) { 1501 return; 1502 } 1503 1504 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" )); 1505 1506 JvmtiEnvIterator it; 1507 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1508 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1509 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" )); 1510 1511 JvmtiThreadEventMark jem(thread); 1512 JvmtiJavaThreadEventTransition jet(thread); 1513 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1514 if (callback != NULL) { 1515 (*callback)(env->jvmti_external(), jem.jni_env(), 1516 resource_exhausted_flags, NULL, description); 1517 } 1518 } 1519 } 1520 } 1521 1522 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) { 1523 HandleMark hm(thread); 1524 methodHandle mh(thread, method); 1525 1526 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s", 1527 JvmtiTrace::safe_get_thread_name(thread), 1528 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1529 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1530 1531 JvmtiThreadState* state = thread->jvmti_thread_state(); 1532 if (state == NULL || !state->is_interp_only_mode()) { 1533 // for any thread that actually wants method entry, interp_only_mode is set 1534 return; 1535 } 1536 1537 state->incr_cur_stack_depth(); 1538 1539 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1540 JvmtiEnvThreadStateIterator it(state); 1541 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1542 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1543 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s", 1544 JvmtiTrace::safe_get_thread_name(thread), 1545 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1546 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1547 1548 JvmtiEnv *env = ets->get_env(); 1549 JvmtiMethodEventMark jem(thread, mh); 1550 JvmtiJavaThreadEventTransition jet(thread); 1551 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1552 if (callback != NULL) { 1553 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1554 } 1555 } 1556 } 1557 } 1558 } 1559 1560 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) { 1561 HandleMark hm(thread); 1562 methodHandle mh(thread, method); 1563 1564 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s", 1565 JvmtiTrace::safe_get_thread_name(thread), 1566 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1567 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1568 1569 JvmtiThreadState *state = thread->jvmti_thread_state(); 1570 if (state == NULL || !state->is_interp_only_mode()) { 1571 // for any thread that actually wants method exit, interp_only_mode is set 1572 return; 1573 } 1574 1575 // return a flag when a method terminates by throwing an exception 1576 // i.e. if an exception is thrown and it's not caught by the current method 1577 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1578 1579 1580 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1581 Handle result; 1582 jvalue value; 1583 value.j = 0L; 1584 1585 // if the method hasn't been popped because of an exception then we populate 1586 // the return_value parameter for the callback. At this point we only have 1587 // the address of a "raw result" and we just call into the interpreter to 1588 // convert this into a jvalue. 1589 if (!exception_exit) { 1590 oop oop_result; 1591 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1592 if (type == T_OBJECT || type == T_ARRAY) { 1593 result = Handle(thread, oop_result); 1594 } 1595 } 1596 1597 JvmtiEnvThreadStateIterator it(state); 1598 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1599 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1600 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s", 1601 JvmtiTrace::safe_get_thread_name(thread), 1602 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1603 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1604 1605 JvmtiEnv *env = ets->get_env(); 1606 JvmtiMethodEventMark jem(thread, mh); 1607 if (result.not_null()) { 1608 value.l = JNIHandles::make_local(thread, result()); 1609 } 1610 JvmtiJavaThreadEventTransition jet(thread); 1611 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1612 if (callback != NULL) { 1613 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1614 jem.jni_methodID(), exception_exit, value); 1615 } 1616 } 1617 } 1618 } 1619 1620 JvmtiEnvThreadStateIterator it(state); 1621 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1622 if (ets->has_frame_pops()) { 1623 int cur_frame_number = state->cur_stack_depth(); 1624 1625 if (ets->is_frame_pop(cur_frame_number)) { 1626 // we have a NotifyFramePop entry for this frame. 1627 // now check that this env/thread wants this event 1628 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1629 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s", 1630 JvmtiTrace::safe_get_thread_name(thread), 1631 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1632 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1633 1634 // we also need to issue a frame pop event for this frame 1635 JvmtiEnv *env = ets->get_env(); 1636 JvmtiMethodEventMark jem(thread, mh); 1637 JvmtiJavaThreadEventTransition jet(thread); 1638 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1639 if (callback != NULL) { 1640 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1641 jem.jni_methodID(), exception_exit); 1642 } 1643 } 1644 // remove the frame's entry 1645 ets->clear_frame_pop(cur_frame_number); 1646 } 1647 } 1648 } 1649 1650 state->decr_cur_stack_depth(); 1651 } 1652 1653 1654 // Todo: inline this for optimization 1655 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) { 1656 HandleMark hm(thread); 1657 methodHandle mh(thread, method); 1658 1659 JvmtiThreadState *state = thread->jvmti_thread_state(); 1660 if (state == NULL) { 1661 return; 1662 } 1663 JvmtiEnvThreadStateIterator it(state); 1664 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1665 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1666 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1667 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT, 1668 JvmtiTrace::safe_get_thread_name(thread), 1669 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1670 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1671 location - mh()->code_base() )); 1672 1673 JvmtiEnv *env = ets->get_env(); 1674 JvmtiLocationEventMark jem(thread, mh, location); 1675 JvmtiJavaThreadEventTransition jet(thread); 1676 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1677 if (callback != NULL) { 1678 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1679 jem.jni_methodID(), jem.location()); 1680 } 1681 1682 ets->set_single_stepping_posted(); 1683 } 1684 } 1685 } 1686 1687 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) { 1688 HandleMark hm(thread); 1689 methodHandle mh(thread, method); 1690 Handle exception_handle(thread, exception); 1691 1692 JvmtiThreadState *state = thread->jvmti_thread_state(); 1693 if (state == NULL) { 1694 return; 1695 } 1696 1697 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered", 1698 JvmtiTrace::safe_get_thread_name(thread))); 1699 if (!state->is_exception_detected()) { 1700 state->set_exception_detected(); 1701 JvmtiEnvThreadStateIterator it(state); 1702 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1703 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1704 1705 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1706 ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT, 1707 JvmtiTrace::safe_get_thread_name(thread), 1708 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1709 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1710 location - mh()->code_base() )); 1711 1712 JvmtiEnv *env = ets->get_env(); 1713 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1714 1715 // It's okay to clear these exceptions here because we duplicate 1716 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1717 EXCEPTION_MARK; 1718 1719 bool should_repeat; 1720 vframeStream st(thread); 1721 assert(!st.at_end(), "cannot be at end"); 1722 Method* current_method = NULL; 1723 // A GC may occur during the Method::fast_exception_handler_bci_for() 1724 // call below if it needs to load the constraint class. Using a 1725 // methodHandle to keep the 'current_method' from being deallocated 1726 // if GC happens. 1727 methodHandle current_mh = methodHandle(thread, current_method); 1728 int current_bci = -1; 1729 do { 1730 current_method = st.method(); 1731 current_mh = methodHandle(thread, current_method); 1732 current_bci = st.bci(); 1733 do { 1734 should_repeat = false; 1735 Klass* eh_klass = exception_handle()->klass(); 1736 current_bci = Method::fast_exception_handler_bci_for( 1737 current_mh, eh_klass, current_bci, THREAD); 1738 if (HAS_PENDING_EXCEPTION) { 1739 exception_handle = Handle(thread, PENDING_EXCEPTION); 1740 CLEAR_PENDING_EXCEPTION; 1741 should_repeat = true; 1742 } 1743 } while (should_repeat && (current_bci != -1)); 1744 st.next(); 1745 } while ((current_bci < 0) && (!st.at_end())); 1746 1747 jmethodID catch_jmethodID; 1748 if (current_bci < 0) { 1749 catch_jmethodID = 0; 1750 current_bci = 0; 1751 } else { 1752 catch_jmethodID = jem.to_jmethodID(current_mh); 1753 } 1754 1755 JvmtiJavaThreadEventTransition jet(thread); 1756 jvmtiEventException callback = env->callbacks()->Exception; 1757 if (callback != NULL) { 1758 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1759 jem.jni_methodID(), jem.location(), 1760 jem.exception(), 1761 catch_jmethodID, current_bci); 1762 } 1763 } 1764 } 1765 } 1766 1767 // frames may get popped because of this throw, be safe - invalidate cached depth 1768 state->invalidate_cur_stack_depth(); 1769 } 1770 1771 1772 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) { 1773 HandleMark hm(thread); 1774 methodHandle mh(thread, method); 1775 Handle exception_handle(thread, exception); 1776 1777 JvmtiThreadState *state = thread->jvmti_thread_state(); 1778 if (state == NULL) { 1779 return; 1780 } 1781 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1782 ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s", 1783 JvmtiTrace::safe_get_thread_name(thread), 1784 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1785 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1786 location==0? "no location:" : "", 1787 location==0? 0 : location - mh()->code_base(), 1788 in_handler_frame? "in handler frame" : "not handler frame" )); 1789 1790 if (state->is_exception_detected()) { 1791 1792 state->invalidate_cur_stack_depth(); 1793 if (!in_handler_frame) { 1794 // Not in exception handler. 1795 if(state->is_interp_only_mode()) { 1796 // method exit and frame pop events are posted only in interp mode. 1797 // When these events are enabled code should be in running in interp mode. 1798 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1799 // The cached cur_stack_depth might have changed from the 1800 // operations of frame pop or method exit. We are not 100% sure 1801 // the cached cur_stack_depth is still valid depth so invalidate 1802 // it. 1803 state->invalidate_cur_stack_depth(); 1804 } 1805 } else { 1806 // In exception handler frame. Report exception catch. 1807 assert(location != NULL, "must be a known location"); 1808 // Update cur_stack_depth - the frames above the current frame 1809 // have been unwound due to this exception: 1810 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1811 state->set_exception_caught(); 1812 1813 JvmtiEnvThreadStateIterator it(state); 1814 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1815 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1816 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1817 ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT, 1818 JvmtiTrace::safe_get_thread_name(thread), 1819 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1820 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1821 location - mh()->code_base() )); 1822 1823 JvmtiEnv *env = ets->get_env(); 1824 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1825 JvmtiJavaThreadEventTransition jet(thread); 1826 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1827 if (callback != NULL) { 1828 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1829 jem.jni_methodID(), jem.location(), 1830 jem.exception()); 1831 } 1832 } 1833 } 1834 } 1835 } 1836 } 1837 1838 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1839 Klass* klass, jfieldID fieldID, bool is_static) { 1840 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1841 // At least one field access watch is set so we have more work 1842 // to do. This wrapper is used by entry points that allow us 1843 // to create handles in post_field_access_by_jni(). 1844 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1845 // event posting can block so refetch oop if we were passed a jobj 1846 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1847 } 1848 return obj; 1849 } 1850 1851 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1852 Klass* klass, jfieldID fieldID, bool is_static) { 1853 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1854 // At least one field access watch is set so we have more work 1855 // to do. This wrapper is used by "quick" entry points that don't 1856 // allow us to create handles in post_field_access_by_jni(). We 1857 // override that with a ResetNoHandleMark. 1858 ResetNoHandleMark rnhm; 1859 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1860 // event posting can block so refetch oop if we were passed a jobj 1861 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1862 } 1863 return obj; 1864 } 1865 1866 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1867 Klass* klass, jfieldID fieldID, bool is_static) { 1868 // We must be called with a Java context in order to provide reasonable 1869 // values for the klazz, method, and location fields. The callers of this 1870 // function don't make the call unless there is a Java context. 1871 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1872 1873 ResourceMark rm; 1874 fieldDescriptor fd; 1875 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1876 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1877 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1878 if (!valid_fieldID) return; 1879 // field accesses are not watched so bail 1880 if (!fd.is_field_access_watched()) return; 1881 1882 HandleMark hm(thread); 1883 Handle h_obj; 1884 if (!is_static) { 1885 // non-static field accessors have an object, but we need a handle 1886 assert(obj != NULL, "non-static needs an object"); 1887 h_obj = Handle(thread, obj); 1888 } 1889 post_field_access(thread, 1890 thread->last_frame().interpreter_frame_method(), 1891 thread->last_frame().interpreter_frame_bcp(), 1892 klass, h_obj, fieldID); 1893 } 1894 1895 void JvmtiExport::post_field_access(JavaThread *thread, Method* method, 1896 address location, Klass* field_klass, Handle object, jfieldID field) { 1897 1898 HandleMark hm(thread); 1899 methodHandle mh(thread, method); 1900 1901 JvmtiThreadState *state = thread->jvmti_thread_state(); 1902 if (state == NULL) { 1903 return; 1904 } 1905 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered", 1906 JvmtiTrace::safe_get_thread_name(thread))); 1907 JvmtiEnvThreadStateIterator it(state); 1908 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1909 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1910 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT, 1911 JvmtiTrace::safe_get_thread_name(thread), 1912 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1913 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1914 location - mh()->code_base() )); 1915 1916 JvmtiEnv *env = ets->get_env(); 1917 JvmtiLocationEventMark jem(thread, mh, location); 1918 jclass field_jclass = jem.to_jclass(field_klass); 1919 jobject field_jobject = jem.to_jobject(object()); 1920 JvmtiJavaThreadEventTransition jet(thread); 1921 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1922 if (callback != NULL) { 1923 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1924 jem.jni_methodID(), jem.location(), 1925 field_jclass, field_jobject, field); 1926 } 1927 } 1928 } 1929 } 1930 1931 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1932 Klass* klass, jfieldID fieldID, bool is_static, 1933 char sig_type, jvalue *value) { 1934 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1935 // At least one field modification watch is set so we have more work 1936 // to do. This wrapper is used by entry points that allow us 1937 // to create handles in post_field_modification_by_jni(). 1938 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1939 // event posting can block so refetch oop if we were passed a jobj 1940 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1941 } 1942 return obj; 1943 } 1944 1945 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1946 Klass* klass, jfieldID fieldID, bool is_static, 1947 char sig_type, jvalue *value) { 1948 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1949 // At least one field modification watch is set so we have more work 1950 // to do. This wrapper is used by "quick" entry points that don't 1951 // allow us to create handles in post_field_modification_by_jni(). We 1952 // override that with a ResetNoHandleMark. 1953 ResetNoHandleMark rnhm; 1954 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1955 // event posting can block so refetch oop if we were passed a jobj 1956 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1957 } 1958 return obj; 1959 } 1960 1961 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1962 Klass* klass, jfieldID fieldID, bool is_static, 1963 char sig_type, jvalue *value) { 1964 // We must be called with a Java context in order to provide reasonable 1965 // values for the klazz, method, and location fields. The callers of this 1966 // function don't make the call unless there is a Java context. 1967 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1968 1969 ResourceMark rm; 1970 fieldDescriptor fd; 1971 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1972 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1973 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1974 if (!valid_fieldID) return; 1975 // field modifications are not watched so bail 1976 if (!fd.is_field_modification_watched()) return; 1977 1978 HandleMark hm(thread); 1979 1980 Handle h_obj; 1981 if (!is_static) { 1982 // non-static field accessors have an object, but we need a handle 1983 assert(obj != NULL, "non-static needs an object"); 1984 h_obj = Handle(thread, obj); 1985 } 1986 post_field_modification(thread, 1987 thread->last_frame().interpreter_frame_method(), 1988 thread->last_frame().interpreter_frame_bcp(), 1989 klass, h_obj, fieldID, sig_type, value); 1990 } 1991 1992 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method, 1993 address location, Klass* field_klass, Handle object, jfieldID field, 1994 char sig_type, jvalue *value) { 1995 1996 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') { 1997 // 'I' instructions are used for byte, char, short and int. 1998 // determine which it really is, and convert 1999 fieldDescriptor fd; 2000 bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd); 2001 // should be found (if not, leave as is) 2002 if (found) { 2003 jint ival = value->i; 2004 // convert value from int to appropriate type 2005 switch (fd.field_type()) { 2006 case T_BOOLEAN: 2007 sig_type = 'Z'; 2008 value->i = 0; // clear it 2009 value->z = (jboolean)ival; 2010 break; 2011 case T_BYTE: 2012 sig_type = 'B'; 2013 value->i = 0; // clear it 2014 value->b = (jbyte)ival; 2015 break; 2016 case T_CHAR: 2017 sig_type = 'C'; 2018 value->i = 0; // clear it 2019 value->c = (jchar)ival; 2020 break; 2021 case T_SHORT: 2022 sig_type = 'S'; 2023 value->i = 0; // clear it 2024 value->s = (jshort)ival; 2025 break; 2026 case T_INT: 2027 // nothing to do 2028 break; 2029 default: 2030 // this is an integer instruction, should be one of above 2031 ShouldNotReachHere(); 2032 break; 2033 } 2034 } 2035 } 2036 2037 assert(sig_type != '[', "array should have sig_type == 'L'"); 2038 bool handle_created = false; 2039 2040 // convert oop to JNI handle. 2041 if (sig_type == 'L') { 2042 handle_created = true; 2043 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 2044 } 2045 2046 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 2047 2048 // Destroy the JNI handle allocated above. 2049 if (handle_created) { 2050 JNIHandles::destroy_local(value->l); 2051 } 2052 } 2053 2054 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method, 2055 address location, Klass* field_klass, Handle object, jfieldID field, 2056 char sig_type, jvalue *value_ptr) { 2057 2058 HandleMark hm(thread); 2059 methodHandle mh(thread, method); 2060 2061 JvmtiThreadState *state = thread->jvmti_thread_state(); 2062 if (state == NULL) { 2063 return; 2064 } 2065 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2066 ("[%s] Trg Field Modification event triggered", 2067 JvmtiTrace::safe_get_thread_name(thread))); 2068 2069 JvmtiEnvThreadStateIterator it(state); 2070 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2071 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 2072 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 2073 ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT, 2074 JvmtiTrace::safe_get_thread_name(thread), 2075 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 2076 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 2077 location - mh()->code_base() )); 2078 2079 JvmtiEnv *env = ets->get_env(); 2080 JvmtiLocationEventMark jem(thread, mh, location); 2081 jclass field_jclass = jem.to_jclass(field_klass); 2082 jobject field_jobject = jem.to_jobject(object()); 2083 JvmtiJavaThreadEventTransition jet(thread); 2084 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 2085 if (callback != NULL) { 2086 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2087 jem.jni_methodID(), jem.location(), 2088 field_jclass, field_jobject, field, sig_type, *value_ptr); 2089 } 2090 } 2091 } 2092 } 2093 2094 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) { 2095 JavaThread* thread = JavaThread::current(); 2096 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 2097 2098 HandleMark hm(thread); 2099 methodHandle mh(thread, method); 2100 2101 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered", 2102 JvmtiTrace::safe_get_thread_name(thread))); 2103 2104 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2105 JvmtiEnvIterator it; 2106 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2107 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 2108 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent", 2109 JvmtiTrace::safe_get_thread_name(thread) )); 2110 2111 JvmtiMethodEventMark jem(thread, mh); 2112 JvmtiJavaThreadEventTransition jet(thread); 2113 JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env(); 2114 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 2115 if (callback != NULL) { 2116 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 2117 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 2118 } 2119 } 2120 } 2121 } 2122 } 2123 2124 // Returns a record containing inlining information for the given nmethod 2125 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 2126 jint numstackframes = 0; 2127 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 2128 record->header.kind = JVMTI_CMLR_INLINE_INFO; 2129 record->header.next = NULL; 2130 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 2131 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 2132 record->numpcs = 0; 2133 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2134 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2135 record->numpcs++; 2136 } 2137 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 2138 int scope = 0; 2139 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 2140 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 2141 void* pc_address = (void*)p->real_pc(nm); 2142 assert(pc_address != NULL, "pc_address must be non-null"); 2143 record->pcinfo[scope].pc = pc_address; 2144 numstackframes=0; 2145 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2146 numstackframes++; 2147 } 2148 assert(numstackframes != 0, "numstackframes must be nonzero."); 2149 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 2150 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 2151 record->pcinfo[scope].numstackframes = numstackframes; 2152 int stackframe = 0; 2153 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 2154 // 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() 2155 assert(sd->method() != NULL, "sd->method() cannot be null."); 2156 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 2157 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 2158 stackframe++; 2159 } 2160 scope++; 2161 } 2162 return record; 2163 } 2164 2165 void JvmtiExport::post_compiled_method_load(nmethod *nm) { 2166 if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) { 2167 return; 2168 } 2169 JavaThread* thread = JavaThread::current(); 2170 2171 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2172 ("[%s] method compile load event triggered", 2173 JvmtiTrace::safe_get_thread_name(thread))); 2174 2175 JvmtiEnvIterator it; 2176 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2177 post_compiled_method_load(env, nm); 2178 } 2179 } 2180 2181 // post a COMPILED_METHOD_LOAD event for a given environment 2182 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, nmethod *nm) { 2183 if (env->phase() == JVMTI_PHASE_PRIMORDIAL || !env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 2184 return; 2185 } 2186 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 2187 if (callback == NULL) { 2188 return; 2189 } 2190 JavaThread* thread = JavaThread::current(); 2191 2192 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 2193 ("[%s] method compile load event sent %s.%s ", 2194 JvmtiTrace::safe_get_thread_name(thread), 2195 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 2196 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 2197 ResourceMark rm(thread); 2198 HandleMark hm(thread); 2199 2200 // Add inlining information 2201 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 2202 // Pass inlining information through the void pointer 2203 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 2204 JvmtiJavaThreadEventTransition jet(thread); 2205 (*callback)(env->jvmti_external(), jem.jni_methodID(), 2206 jem.code_size(), jem.code_data(), jem.map_length(), 2207 jem.map(), jem.compile_info()); 2208 } 2209 2210 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 2211 assert(name != NULL && name[0] != '\0', "sanity check"); 2212 2213 JavaThread* thread = JavaThread::current(); 2214 // In theory everyone coming thru here is in_vm but we need to be certain 2215 // because a callee will do a vm->native transition 2216 ThreadInVMfromUnknown __tiv; 2217 2218 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2219 ("[%s] method dynamic code generated event triggered", 2220 JvmtiTrace::safe_get_thread_name(thread))); 2221 JvmtiEnvIterator it; 2222 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2223 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2224 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2225 ("[%s] dynamic code generated event sent for %s", 2226 JvmtiTrace::safe_get_thread_name(thread), name)); 2227 JvmtiEventMark jem(thread); 2228 JvmtiJavaThreadEventTransition jet(thread); 2229 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2230 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2231 if (callback != NULL) { 2232 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2233 } 2234 } 2235 } 2236 } 2237 2238 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 2239 jvmtiPhase phase = JvmtiEnv::get_phase(); 2240 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 2241 post_dynamic_code_generated_internal(name, code_begin, code_end); 2242 } else { 2243 // It may not be safe to post the event from this thread. Defer all 2244 // postings to the service thread so that it can perform them in a safe 2245 // context and in-order. 2246 MutexLocker ml(Service_lock, Mutex::_no_safepoint_check_flag); 2247 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 2248 name, code_begin, code_end); 2249 JvmtiDeferredEventQueue::enqueue(event); 2250 } 2251 } 2252 2253 2254 // post a DYNAMIC_CODE_GENERATED event for a given environment 2255 // used by GenerateEvents 2256 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 2257 const void *code_begin, const void *code_end) 2258 { 2259 JavaThread* thread = JavaThread::current(); 2260 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2261 ("[%s] dynamic code generated event triggered (by GenerateEvents)", 2262 JvmtiTrace::safe_get_thread_name(thread))); 2263 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 2264 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 2265 ("[%s] dynamic code generated event sent for %s", 2266 JvmtiTrace::safe_get_thread_name(thread), name)); 2267 JvmtiEventMark jem(thread); 2268 JvmtiJavaThreadEventTransition jet(thread); 2269 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 2270 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 2271 if (callback != NULL) { 2272 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 2273 } 2274 } 2275 } 2276 2277 // post a DynamicCodeGenerated event while holding locks in the VM. 2278 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 2279 address code_begin, address code_end) 2280 { 2281 // register the stub with the current dynamic code event collector 2282 // Cannot take safepoint here so do not use state_for to get 2283 // jvmti thread state. 2284 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2285 // state can only be NULL if the current thread is exiting which 2286 // should not happen since we're trying to post an event 2287 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 2288 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 2289 guarantee(collector != NULL, "attempt to register stub without event collector"); 2290 collector->register_stub(name, code_begin, code_end); 2291 } 2292 2293 // Collect all the vm internally allocated objects which are visible to java world 2294 void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 2295 Thread* thread = Thread::current_or_null(); 2296 if (thread != NULL && thread->is_Java_thread()) { 2297 // Can not take safepoint here. 2298 NoSafepointVerifier no_sfpt; 2299 // Cannot take safepoint here so do not use state_for to get 2300 // jvmti thread state. 2301 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2302 if (state != NULL) { 2303 // state is non NULL when VMObjectAllocEventCollector is enabled. 2304 JvmtiVMObjectAllocEventCollector *collector; 2305 collector = state->get_vm_object_alloc_event_collector(); 2306 if (collector != NULL && collector->is_enabled()) { 2307 // Don't record classes as these will be notified via the ClassLoad 2308 // event. 2309 if (obj->klass() != SystemDictionary::Class_klass()) { 2310 collector->record_allocation(obj); 2311 } 2312 } 2313 } 2314 } 2315 } 2316 2317 // Collect all the sampled allocated objects. 2318 void JvmtiExport::record_sampled_internal_object_allocation(oop obj) { 2319 Thread* thread = Thread::current_or_null(); 2320 if (thread != NULL && thread->is_Java_thread()) { 2321 // Can not take safepoint here. 2322 NoSafepointVerifier no_sfpt; 2323 // Cannot take safepoint here so do not use state_for to get 2324 // jvmti thread state. 2325 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 2326 if (state != NULL) { 2327 // state is non NULL when SampledObjectAllocEventCollector is enabled. 2328 JvmtiSampledObjectAllocEventCollector *collector; 2329 collector = state->get_sampled_object_alloc_event_collector(); 2330 2331 if (collector != NULL && collector->is_enabled()) { 2332 collector->record_allocation(obj); 2333 } 2334 } 2335 } 2336 } 2337 2338 void JvmtiExport::post_garbage_collection_finish() { 2339 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 2340 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2341 ("[%s] garbage collection finish event triggered", 2342 JvmtiTrace::safe_get_thread_name(thread))); 2343 JvmtiEnvIterator it; 2344 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2345 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 2346 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 2347 ("[%s] garbage collection finish event sent", 2348 JvmtiTrace::safe_get_thread_name(thread))); 2349 JvmtiThreadEventTransition jet(thread); 2350 // JNIEnv is NULL here because this event is posted from VM Thread 2351 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 2352 if (callback != NULL) { 2353 (*callback)(env->jvmti_external()); 2354 } 2355 } 2356 } 2357 } 2358 2359 void JvmtiExport::post_garbage_collection_start() { 2360 Thread* thread = Thread::current(); // this event is posted from vm-thread. 2361 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2362 ("[%s] garbage collection start event triggered", 2363 JvmtiTrace::safe_get_thread_name(thread))); 2364 JvmtiEnvIterator it; 2365 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2366 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 2367 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 2368 ("[%s] garbage collection start event sent", 2369 JvmtiTrace::safe_get_thread_name(thread))); 2370 JvmtiThreadEventTransition jet(thread); 2371 // JNIEnv is NULL here because this event is posted from VM Thread 2372 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 2373 if (callback != NULL) { 2374 (*callback)(env->jvmti_external()); 2375 } 2376 } 2377 } 2378 } 2379 2380 void JvmtiExport::post_data_dump() { 2381 Thread *thread = Thread::current(); 2382 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2383 ("[%s] data dump request event triggered", 2384 JvmtiTrace::safe_get_thread_name(thread))); 2385 JvmtiEnvIterator it; 2386 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2387 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 2388 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 2389 ("[%s] data dump request event sent", 2390 JvmtiTrace::safe_get_thread_name(thread))); 2391 JvmtiThreadEventTransition jet(thread); 2392 // JNIEnv is NULL here because this event is posted from VM Thread 2393 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 2394 if (callback != NULL) { 2395 (*callback)(env->jvmti_external()); 2396 } 2397 } 2398 } 2399 } 2400 2401 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 2402 oop object = (oop)obj_mntr->object(); 2403 JvmtiThreadState *state = thread->jvmti_thread_state(); 2404 if (state == NULL) { 2405 return; 2406 } 2407 2408 HandleMark hm(thread); 2409 Handle h(thread, object); 2410 2411 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2412 ("[%s] monitor contended enter event triggered", 2413 JvmtiTrace::safe_get_thread_name(thread))); 2414 2415 JvmtiEnvThreadStateIterator it(state); 2416 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2417 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 2418 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 2419 ("[%s] monitor contended enter event sent", 2420 JvmtiTrace::safe_get_thread_name(thread))); 2421 JvmtiMonitorEventMark jem(thread, h()); 2422 JvmtiEnv *env = ets->get_env(); 2423 JvmtiThreadEventTransition jet(thread); 2424 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2425 if (callback != NULL) { 2426 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2427 } 2428 } 2429 } 2430 } 2431 2432 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2433 oop object = (oop)obj_mntr->object(); 2434 JvmtiThreadState *state = thread->jvmti_thread_state(); 2435 if (state == NULL) { 2436 return; 2437 } 2438 2439 HandleMark hm(thread); 2440 Handle h(thread, object); 2441 2442 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2443 ("[%s] monitor contended entered event triggered", 2444 JvmtiTrace::safe_get_thread_name(thread))); 2445 2446 JvmtiEnvThreadStateIterator it(state); 2447 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2448 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2449 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2450 ("[%s] monitor contended enter event sent", 2451 JvmtiTrace::safe_get_thread_name(thread))); 2452 JvmtiMonitorEventMark jem(thread, h()); 2453 JvmtiEnv *env = ets->get_env(); 2454 JvmtiThreadEventTransition jet(thread); 2455 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2456 if (callback != NULL) { 2457 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2458 } 2459 } 2460 } 2461 } 2462 2463 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2464 jlong timeout) { 2465 JvmtiThreadState *state = thread->jvmti_thread_state(); 2466 if (state == NULL) { 2467 return; 2468 } 2469 2470 HandleMark hm(thread); 2471 Handle h(thread, object); 2472 2473 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2474 ("[%s] monitor wait event triggered", 2475 JvmtiTrace::safe_get_thread_name(thread))); 2476 2477 JvmtiEnvThreadStateIterator it(state); 2478 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2479 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2480 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2481 ("[%s] monitor wait event sent", 2482 JvmtiTrace::safe_get_thread_name(thread))); 2483 JvmtiMonitorEventMark jem(thread, h()); 2484 JvmtiEnv *env = ets->get_env(); 2485 JvmtiThreadEventTransition jet(thread); 2486 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2487 if (callback != NULL) { 2488 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2489 jem.jni_object(), timeout); 2490 } 2491 } 2492 } 2493 } 2494 2495 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2496 oop object = (oop)obj_mntr->object(); 2497 JvmtiThreadState *state = thread->jvmti_thread_state(); 2498 if (state == NULL) { 2499 return; 2500 } 2501 2502 HandleMark hm(thread); 2503 Handle h(thread, object); 2504 2505 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2506 ("[%s] monitor waited event triggered", 2507 JvmtiTrace::safe_get_thread_name(thread))); 2508 2509 JvmtiEnvThreadStateIterator it(state); 2510 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2511 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2512 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2513 ("[%s] monitor waited event sent", 2514 JvmtiTrace::safe_get_thread_name(thread))); 2515 JvmtiMonitorEventMark jem(thread, h()); 2516 JvmtiEnv *env = ets->get_env(); 2517 JvmtiThreadEventTransition jet(thread); 2518 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2519 if (callback != NULL) { 2520 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2521 jem.jni_object(), timed_out); 2522 } 2523 } 2524 } 2525 } 2526 2527 void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2528 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered", 2529 JvmtiTrace::safe_get_thread_name(thread))); 2530 if (object == NULL) { 2531 return; 2532 } 2533 HandleMark hm(thread); 2534 Handle h(thread, object); 2535 JvmtiEnvIterator it; 2536 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2537 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2538 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s", 2539 JvmtiTrace::safe_get_thread_name(thread), 2540 object==NULL? "NULL" : object->klass()->external_name())); 2541 2542 JvmtiObjectAllocEventMark jem(thread, h()); 2543 JvmtiJavaThreadEventTransition jet(thread); 2544 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2545 if (callback != NULL) { 2546 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2547 jem.jni_jobject(), jem.jni_class(), jem.size()); 2548 } 2549 } 2550 } 2551 } 2552 2553 void JvmtiExport::post_sampled_object_alloc(JavaThread *thread, oop object) { 2554 JvmtiThreadState *state = thread->jvmti_thread_state(); 2555 if (state == NULL) { 2556 return; 2557 } 2558 2559 EVT_TRIG_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2560 ("[%s] Trg sampled object alloc triggered", 2561 JvmtiTrace::safe_get_thread_name(thread))); 2562 if (object == NULL) { 2563 return; 2564 } 2565 HandleMark hm(thread); 2566 Handle h(thread, object); 2567 2568 JvmtiEnvThreadStateIterator it(state); 2569 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2570 if (ets->is_enabled(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC)) { 2571 EVT_TRACE(JVMTI_EVENT_SAMPLED_OBJECT_ALLOC, 2572 ("[%s] Evt sampled object alloc sent %s", 2573 JvmtiTrace::safe_get_thread_name(thread), 2574 object == NULL ? "NULL" : object->klass()->external_name())); 2575 2576 JvmtiEnv *env = ets->get_env(); 2577 JvmtiObjectAllocEventMark jem(thread, h()); 2578 JvmtiJavaThreadEventTransition jet(thread); 2579 jvmtiEventSampledObjectAlloc callback = env->callbacks()->SampledObjectAlloc; 2580 if (callback != NULL) { 2581 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2582 jem.jni_jobject(), jem.jni_class(), jem.size()); 2583 } 2584 } 2585 } 2586 } 2587 2588 //////////////////////////////////////////////////////////////////////////////////////////////// 2589 2590 void JvmtiExport::cleanup_thread(JavaThread* thread) { 2591 assert(JavaThread::current() == thread, "thread is not current"); 2592 MutexLocker mu(JvmtiThreadState_lock); 2593 2594 if (thread->jvmti_thread_state() != NULL) { 2595 // This has to happen after the thread state is removed, which is 2596 // why it is not in post_thread_end_event like its complement 2597 // Maybe both these functions should be rolled into the posts? 2598 JvmtiEventController::thread_ended(thread); 2599 } 2600 } 2601 2602 void JvmtiExport::clear_detected_exception(JavaThread* thread) { 2603 assert(JavaThread::current() == thread, "thread is not current"); 2604 2605 JvmtiThreadState* state = thread->jvmti_thread_state(); 2606 if (state != NULL) { 2607 state->clear_exception_state(); 2608 } 2609 } 2610 2611 void JvmtiExport::oops_do(OopClosure* f) { 2612 JvmtiCurrentBreakpoints::oops_do(f); 2613 JvmtiObjectAllocEventCollector::oops_do_for_all_threads(f); 2614 } 2615 2616 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { 2617 JvmtiTagMap::weak_oops_do(is_alive, f); 2618 } 2619 2620 // Onload raw monitor transition. 2621 void JvmtiExport::transition_pending_onload_raw_monitors() { 2622 JvmtiPendingMonitors::transition_raw_monitors(); 2623 } 2624 2625 //////////////////////////////////////////////////////////////////////////////////////////////// 2626 #if INCLUDE_SERVICES 2627 // Attach is disabled if SERVICES is not included 2628 2629 // type for the Agent_OnAttach entry point 2630 extern "C" { 2631 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2632 } 2633 2634 jint JvmtiExport::load_agent_library(const char *agent, const char *absParam, 2635 const char *options, outputStream* st) { 2636 char ebuf[1024] = {0}; 2637 char buffer[JVM_MAXPATHLEN]; 2638 void* library = NULL; 2639 jint result = JNI_ERR; 2640 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2641 size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols); 2642 2643 // The abs paramter should be "true" or "false" 2644 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2645 2646 // Initially marked as invalid. It will be set to valid if we can find the agent 2647 AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL); 2648 2649 // Check for statically linked in agent. If not found then if the path is 2650 // absolute we attempt to load the library. Otherwise we try to load it 2651 // from the standard dll directory. 2652 2653 if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) { 2654 if (is_absolute_path) { 2655 library = os::dll_load(agent, ebuf, sizeof ebuf); 2656 } else { 2657 // Try to load the agent from the standard dll directory 2658 if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(), 2659 agent)) { 2660 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2661 } 2662 if (library == NULL) { 2663 // not found - try OS default library path 2664 if (os::dll_build_name(buffer, sizeof(buffer), agent)) { 2665 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2666 } 2667 } 2668 } 2669 if (library != NULL) { 2670 agent_lib->set_os_lib(library); 2671 agent_lib->set_valid(); 2672 } 2673 } 2674 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2675 // function 2676 if (agent_lib->valid()) { 2677 // Lookup the Agent_OnAttach function 2678 OnAttachEntry_t on_attach_entry = NULL; 2679 on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, 2680 os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries)); 2681 if (on_attach_entry == NULL) { 2682 // Agent_OnAttach missing - unload library 2683 if (!agent_lib->is_static_lib()) { 2684 os::dll_unload(library); 2685 } 2686 st->print_cr("%s is not available in %s", 2687 on_attach_symbols[0], agent_lib->name()); 2688 delete agent_lib; 2689 } else { 2690 // Invoke the Agent_OnAttach function 2691 JavaThread* THREAD = JavaThread::current(); 2692 { 2693 extern struct JavaVM_ main_vm; 2694 JvmtiThreadEventMark jem(THREAD); 2695 JvmtiJavaThreadEventTransition jet(THREAD); 2696 2697 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2698 } 2699 2700 // Agent_OnAttach may have used JNI 2701 if (HAS_PENDING_EXCEPTION) { 2702 CLEAR_PENDING_EXCEPTION; 2703 } 2704 2705 // If OnAttach returns JNI_OK then we add it to the list of 2706 // agent libraries so that we can call Agent_OnUnload later. 2707 if (result == JNI_OK) { 2708 Arguments::add_loaded_agent(agent_lib); 2709 } else { 2710 delete agent_lib; 2711 } 2712 2713 // Agent_OnAttach executed so completion status is JNI_OK 2714 st->print_cr("return code: %d", result); 2715 result = JNI_OK; 2716 } 2717 } else { 2718 st->print_cr("%s was not loaded.", agent); 2719 if (*ebuf != '\0') { 2720 st->print_cr("%s", ebuf); 2721 } 2722 } 2723 return result; 2724 } 2725 2726 #endif // INCLUDE_SERVICES 2727 //////////////////////////////////////////////////////////////////////////////////////////////// 2728 2729 // Setup current current thread for event collection. 2730 void JvmtiEventCollector::setup_jvmti_thread_state() { 2731 // set this event collector to be the current one. 2732 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2733 // state can only be NULL if the current thread is exiting which 2734 // should not happen since we're trying to configure for event collection 2735 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2736 if (is_vm_object_alloc_event()) { 2737 JvmtiVMObjectAllocEventCollector *prev = state->get_vm_object_alloc_event_collector(); 2738 2739 // If we have a previous collector and it is disabled, it means this allocation came from a 2740 // callback induced VM Object allocation, do not register this collector then. 2741 if (prev && !prev->is_enabled()) { 2742 return; 2743 } 2744 _prev = prev; 2745 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2746 } else if (is_dynamic_code_event()) { 2747 _prev = state->get_dynamic_code_event_collector(); 2748 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2749 } else if (is_sampled_object_alloc_event()) { 2750 JvmtiSampledObjectAllocEventCollector *prev = state->get_sampled_object_alloc_event_collector(); 2751 2752 if (prev) { 2753 // JvmtiSampledObjectAllocEventCollector wants only one active collector 2754 // enabled. This allows to have a collector detect a user code requiring 2755 // a sample in the callback. 2756 return; 2757 } 2758 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*) this); 2759 } 2760 2761 _unset_jvmti_thread_state = true; 2762 } 2763 2764 // Unset current event collection in this thread and reset it with previous 2765 // collector. 2766 void JvmtiEventCollector::unset_jvmti_thread_state() { 2767 if (!_unset_jvmti_thread_state) { 2768 return; 2769 } 2770 2771 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2772 if (state != NULL) { 2773 // restore the previous event collector (if any) 2774 if (is_vm_object_alloc_event()) { 2775 if (state->get_vm_object_alloc_event_collector() == this) { 2776 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2777 } else { 2778 // this thread's jvmti state was created during the scope of 2779 // the event collector. 2780 } 2781 } else if (is_dynamic_code_event()) { 2782 if (state->get_dynamic_code_event_collector() == this) { 2783 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2784 } else { 2785 // this thread's jvmti state was created during the scope of 2786 // the event collector. 2787 } 2788 } else if (is_sampled_object_alloc_event()) { 2789 if (state->get_sampled_object_alloc_event_collector() == this) { 2790 state->set_sampled_object_alloc_event_collector((JvmtiSampledObjectAllocEventCollector*)_prev); 2791 } else { 2792 // this thread's jvmti state was created during the scope of 2793 // the event collector. 2794 } 2795 } 2796 } 2797 } 2798 2799 // create the dynamic code event collector 2800 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2801 if (JvmtiExport::should_post_dynamic_code_generated()) { 2802 setup_jvmti_thread_state(); 2803 } 2804 } 2805 2806 // iterate over any code blob descriptors collected and post a 2807 // DYNAMIC_CODE_GENERATED event to the profiler. 2808 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2809 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2810 // iterate over any code blob descriptors that we collected 2811 if (_code_blobs != NULL) { 2812 for (int i=0; i<_code_blobs->length(); i++) { 2813 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2814 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2815 FreeHeap(blob); 2816 } 2817 delete _code_blobs; 2818 } 2819 unset_jvmti_thread_state(); 2820 } 2821 2822 // register a stub 2823 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2824 if (_code_blobs == NULL) { 2825 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true); 2826 } 2827 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2828 } 2829 2830 // Setup current thread to record vm allocated objects. 2831 JvmtiObjectAllocEventCollector::JvmtiObjectAllocEventCollector() : 2832 _allocated(NULL), _enable(false), _post_callback(NULL) { 2833 } 2834 2835 // Post vm_object_alloc event for vm allocated objects visible to java 2836 // world. 2837 void JvmtiObjectAllocEventCollector::generate_call_for_allocated() { 2838 if (_allocated) { 2839 set_enabled(false); 2840 for (int i = 0; i < _allocated->length(); i++) { 2841 oop obj = _allocated->at(i); 2842 _post_callback(JavaThread::current(), obj); 2843 } 2844 delete _allocated, _allocated = NULL; 2845 } 2846 } 2847 2848 void JvmtiObjectAllocEventCollector::record_allocation(oop obj) { 2849 assert(is_enabled(), "Object alloc event collector is not enabled"); 2850 if (_allocated == NULL) { 2851 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true); 2852 } 2853 _allocated->push(obj); 2854 } 2855 2856 // GC support. 2857 void JvmtiObjectAllocEventCollector::oops_do(OopClosure* f) { 2858 if (_allocated) { 2859 for(int i = _allocated->length() - 1; i >= 0; i--) { 2860 if (_allocated->at(i) != NULL) { 2861 f->do_oop(_allocated->adr_at(i)); 2862 } 2863 } 2864 } 2865 } 2866 2867 void JvmtiObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { 2868 // no-op if jvmti not enabled 2869 if (!JvmtiEnv::environments_might_exist()) { 2870 return; 2871 } 2872 2873 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *jthr = jtiwh.next(); ) { 2874 JvmtiThreadState *state = jthr->jvmti_thread_state(); 2875 if (state != NULL) { 2876 JvmtiObjectAllocEventCollector *collector; 2877 collector = state->get_vm_object_alloc_event_collector(); 2878 while (collector != NULL) { 2879 collector->oops_do(f); 2880 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev(); 2881 } 2882 2883 collector = state->get_sampled_object_alloc_event_collector(); 2884 while (collector != NULL) { 2885 collector->oops_do(f); 2886 collector = (JvmtiObjectAllocEventCollector*) collector->get_prev(); 2887 } 2888 } 2889 } 2890 } 2891 2892 2893 // Disable collection of VMObjectAlloc events 2894 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2895 // a no-op if VMObjectAlloc event is not enabled 2896 if (!JvmtiExport::should_post_vm_object_alloc()) { 2897 return; 2898 } 2899 Thread* thread = Thread::current_or_null(); 2900 if (thread != NULL && thread->is_Java_thread()) { 2901 JavaThread* current_thread = (JavaThread*)thread; 2902 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2903 if (state != NULL) { 2904 JvmtiVMObjectAllocEventCollector *collector; 2905 collector = state->get_vm_object_alloc_event_collector(); 2906 if (collector != NULL && collector->is_enabled()) { 2907 _collector = collector; 2908 _collector->set_enabled(false); 2909 } 2910 } 2911 } 2912 } 2913 2914 // Re-Enable collection of VMObjectAlloc events (if previously enabled) 2915 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2916 if (was_enabled()) { 2917 _collector->set_enabled(true); 2918 } 2919 }; 2920 2921 // Setup current thread to record vm allocated objects. 2922 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() { 2923 if (JvmtiExport::should_post_vm_object_alloc()) { 2924 _enable = true; 2925 setup_jvmti_thread_state(); 2926 _post_callback = JvmtiExport::post_vm_object_alloc; 2927 } 2928 } 2929 2930 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2931 if (_enable) { 2932 generate_call_for_allocated(); 2933 } 2934 unset_jvmti_thread_state(); 2935 } 2936 2937 bool JvmtiSampledObjectAllocEventCollector::object_alloc_is_safe_to_sample() { 2938 Thread* thread = Thread::current(); 2939 // Really only sample allocations if this is a JavaThread and not the compiler 2940 // thread. 2941 if (!thread->is_Java_thread() || thread->is_Compiler_thread()) { 2942 return false; 2943 } 2944 2945 if (MultiArray_lock->owner() == thread) { 2946 return false; 2947 } 2948 return true; 2949 } 2950 2951 // Setup current thread to record sampled allocated objects. 2952 JvmtiSampledObjectAllocEventCollector::JvmtiSampledObjectAllocEventCollector() { 2953 if (JvmtiExport::should_post_sampled_object_alloc()) { 2954 if (!object_alloc_is_safe_to_sample()) { 2955 return; 2956 } 2957 2958 _enable = true; 2959 setup_jvmti_thread_state(); 2960 _post_callback = JvmtiExport::post_sampled_object_alloc; 2961 } 2962 } 2963 2964 JvmtiSampledObjectAllocEventCollector::~JvmtiSampledObjectAllocEventCollector() { 2965 if (!_enable) { 2966 return; 2967 } 2968 2969 generate_call_for_allocated(); 2970 unset_jvmti_thread_state(); 2971 2972 // Unset the sampling collector as present in assertion mode only. 2973 assert(Thread::current()->is_Java_thread(), 2974 "Should always be in a Java thread"); 2975 } 2976 2977 JvmtiGCMarker::JvmtiGCMarker() { 2978 // if there aren't any JVMTI environments then nothing to do 2979 if (!JvmtiEnv::environments_might_exist()) { 2980 return; 2981 } 2982 2983 if (JvmtiExport::should_post_garbage_collection_start()) { 2984 JvmtiExport::post_garbage_collection_start(); 2985 } 2986 2987 if (SafepointSynchronize::is_at_safepoint()) { 2988 // Do clean up tasks that need to be done at a safepoint 2989 JvmtiEnvBase::check_for_periodic_clean_up(); 2990 } 2991 } 2992 2993 JvmtiGCMarker::~JvmtiGCMarker() { 2994 // if there aren't any JVMTI environments then nothing to do 2995 if (!JvmtiEnv::environments_might_exist()) { 2996 return; 2997 } 2998 2999 // JVMTI notify gc finish 3000 if (JvmtiExport::should_post_garbage_collection_finish()) { 3001 JvmtiExport::post_garbage_collection_finish(); 3002 } 3003 }