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