jdk8-mips64-public/hotspot: src/share/vm/prims/jvmtiExport.cpp@db9981fd3124 (annotated)

src/share/vm/prims/jvmtiExport.cpp@db9981fd3124 (annotated)

src/share/vm/prims/jvmtiExport.cpp

Wed, 23 Jan 2013 13:02:39 -0500

author: jprovino
date: Wed, 23 Jan 2013 13:02:39 -0500
changeset 4542: db9981fd3124
parent 4405: 0c8717a92b2d
child 4544: 3c9bc17b9403
permissions: -rw-r--r--

8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
Summary: Rename INCLUDE_ALTERNATE_GCS to INCLUDE_ALL_GCS and replace SERIALGC with INCLUDE_ALL_GCS.
Reviewed-by: coleenp, stefank

 /*
  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "code/nmethod.hpp"
 #include "code/pcDesc.hpp"
 #include "code/scopeDesc.hpp"
 #include "interpreter/interpreter.hpp"
 #include "jvmtifiles/jvmtiEnv.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/objArrayOop.hpp"
 #include "prims/jvmtiCodeBlobEvents.hpp"
 #include "prims/jvmtiEventController.hpp"
 #include "prims/jvmtiEventController.inline.hpp"
 #include "prims/jvmtiExport.hpp"
 #include "prims/jvmtiImpl.hpp"
 #include "prims/jvmtiManageCapabilities.hpp"
 #include "prims/jvmtiRawMonitor.hpp"
 #include "prims/jvmtiTagMap.hpp"
 #include "prims/jvmtiThreadState.inline.hpp"
 #include "runtime/arguments.hpp"
 #include "runtime/handles.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/objectMonitor.hpp"
 #include "runtime/objectMonitor.inline.hpp"
 #include "runtime/thread.hpp"
 #include "runtime/vframe.hpp"
 #include "services/attachListener.hpp"
 #include "services/serviceUtil.hpp"
 #include "utilities/macros.hpp"
 #if INCLUDE_ALL_GCS
 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
 #endif // INCLUDE_ALL_GCS
 #ifdef JVMTI_TRACE
 #define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; }
 #define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; }
 #else
 #define EVT_TRIG_TRACE(evt,out)
 #define EVT_TRACE(evt,out)
 #endif
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiEventTransition
 //
 // TO DO --
 //  more handle purging
 // Use this for JavaThreads and state is  _thread_in_vm.
 class JvmtiJavaThreadEventTransition : StackObj {
 private:
   ResourceMark _rm;
   ThreadToNativeFromVM _transition;
   HandleMark _hm;
 public:
   JvmtiJavaThreadEventTransition(JavaThread *thread) :
     _rm(),
     _transition(thread),
     _hm(thread)  {};
 };
 // For JavaThreads which are not in _thread_in_vm state
 // and other system threads use this.
 class JvmtiThreadEventTransition : StackObj {
 private:
   ResourceMark _rm;
   HandleMark _hm;
   JavaThreadState _saved_state;
   JavaThread *_jthread;
 public:
   JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
     if (thread->is_Java_thread()) {
        _jthread = (JavaThread *)thread;
        _saved_state = _jthread->thread_state();
        if (_saved_state == _thread_in_Java) {
          ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
        } else {
          ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
        }
     } else {
       _jthread = NULL;
     }
   }
   ~JvmtiThreadEventTransition() {
     if (_jthread != NULL)
       ThreadStateTransition::transition_from_native(_jthread, _saved_state);
   }
 };
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiEventMark
 //
 class JvmtiEventMark : public StackObj {
 private:
   JavaThread *_thread;
   JNIEnv* _jni_env;
   bool _exception_detected;
   bool _exception_caught;
 #if 0
   JNIHandleBlock* _hblock;
 #endif
 public:
   JvmtiEventMark(JavaThread *thread) :  _thread(thread),
                                          _jni_env(thread->jni_environment()) {
 #if 0
     _hblock = thread->active_handles();
     _hblock->clear_thoroughly(); // so we can be safe
 #else
     // we want to use the code above - but that needs the JNIHandle changes - later...
     // for now, steal JNI push local frame code
     JvmtiThreadState *state = thread->jvmti_thread_state();
     // we are before an event.
     // Save current jvmti thread exception state.
     if (state != NULL) {
       _exception_detected = state->is_exception_detected();
       _exception_caught = state->is_exception_caught();
     } else {
       _exception_detected = false;
       _exception_caught = false;
     }
     JNIHandleBlock* old_handles = thread->active_handles();
     JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
     assert(new_handles != NULL, "should not be NULL");
     new_handles->set_pop_frame_link(old_handles);
     thread->set_active_handles(new_handles);
 #endif
     assert(thread == JavaThread::current(), "thread must be current!");
     thread->frame_anchor()->make_walkable(thread);
   };
   ~JvmtiEventMark() {
 #if 0
     _hblock->clear(); // for consistency with future correct behavior
 #else
     // we want to use the code above - but that needs the JNIHandle changes - later...
     // for now, steal JNI pop local frame code
     JNIHandleBlock* old_handles = _thread->active_handles();
     JNIHandleBlock* new_handles = old_handles->pop_frame_link();
     assert(new_handles != NULL, "should not be NULL");
     _thread->set_active_handles(new_handles);
     // Note that we set the pop_frame_link to NULL explicitly, otherwise
     // the release_block call will release the blocks.
     old_handles->set_pop_frame_link(NULL);
     JNIHandleBlock::release_block(old_handles, _thread); // may block
 #endif
     JvmtiThreadState* state = _thread->jvmti_thread_state();
     // we are continuing after an event.
     if (state != NULL) {
       // Restore the jvmti thread exception state.
       if (_exception_detected) {
         state->set_exception_detected();
       }
       if (_exception_caught) {
         state->set_exception_caught();
       }
     }
   }
 #if 0
   jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
 #else
   // we want to use the code above - but that needs the JNIHandle changes - later...
   // for now, use regular make_local
   jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
 #endif
   jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
   jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); }
   JNIEnv* jni_env() { return _jni_env; }
 };
 class JvmtiThreadEventMark : public JvmtiEventMark {
 private:
   jthread _jt;
 public:
   JvmtiThreadEventMark(JavaThread *thread) :
     JvmtiEventMark(thread) {
     _jt = (jthread)(to_jobject(thread->threadObj()));
   };
  jthread jni_thread() { return _jt; }
 };
 class JvmtiClassEventMark : public JvmtiThreadEventMark {
 private:
   jclass _jc;
 public:
   JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
     JvmtiThreadEventMark(thread) {
     _jc = to_jclass(klass);
   };
   jclass jni_class() { return _jc; }
 };
 class JvmtiMethodEventMark : public JvmtiThreadEventMark {
 private:
   jmethodID _mid;
 public:
   JvmtiMethodEventMark(JavaThread *thread, methodHandle method) :
     JvmtiThreadEventMark(thread),
     _mid(to_jmethodID(method)) {};
   jmethodID jni_methodID() { return _mid; }
 };
 class JvmtiLocationEventMark : public JvmtiMethodEventMark {
 private:
   jlocation _loc;
 public:
   JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) :
     JvmtiMethodEventMark(thread, method),
     _loc(location - method->code_base()) {};
   jlocation location() { return _loc; }
 };
 class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
 private:
   jobject _exc;
 public:
   JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) :
     JvmtiLocationEventMark(thread, method, location),
     _exc(to_jobject(exception())) {};
   jobject exception() { return _exc; }
 };
 class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
 private:
   const char *_class_name;
   jobject _jloader;
   jobject _protection_domain;
   jclass  _class_being_redefined;
 public:
   JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
      Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) {
       _class_name = name != NULL? name->as_utf8() : NULL;
       _jloader = (jobject)to_jobject(class_loader());
       _protection_domain = (jobject)to_jobject(prot_domain());
       if (class_being_redefined == NULL) {
         _class_being_redefined = NULL;
       } else {
         _class_being_redefined = (jclass)to_jclass((*class_being_redefined)());
       }
   };
   const char *class_name() {
     return _class_name;
   }
   jobject jloader() {
     return _jloader;
   }
   jobject protection_domain() {
     return _protection_domain;
   }
   jclass class_being_redefined() {
     return _class_being_redefined;
   }
 };
 //////////////////////////////////////////////////////////////////////////////
 int               JvmtiExport::_field_access_count                        = 0;
 int               JvmtiExport::_field_modification_count                  = 0;
 bool              JvmtiExport::_can_access_local_variables                = false;
 bool              JvmtiExport::_can_hotswap_or_post_breakpoint            = false;
 bool              JvmtiExport::_can_modify_any_class                      = false;
 bool              JvmtiExport::_can_walk_any_space                        = false;
 bool              JvmtiExport::_has_redefined_a_class                     = false;
 bool              JvmtiExport::_all_dependencies_are_recorded             = false;
 //
 // field access management
 //
 // interpreter generator needs the address of the counter
 address JvmtiExport::get_field_access_count_addr() {
   // We don't grab a lock because we don't want to
   // serialize field access between all threads. This means that a
   // thread on another processor can see the wrong count value and
   // may either miss making a needed call into post_field_access()
   // or will make an unneeded call into post_field_access(). We pay
   // this price to avoid slowing down the VM when we aren't watching
   // field accesses.
   // Other access/mutation safe by virtue of being in VM state.
   return (address)(&_field_access_count);
 }
 //
 // field modification management
 //
 // interpreter generator needs the address of the counter
 address JvmtiExport::get_field_modification_count_addr() {
   // We don't grab a lock because we don't
   // want to serialize field modification between all threads. This
   // means that a thread on another processor can see the wrong
   // count value and may either miss making a needed call into
   // post_field_modification() or will make an unneeded call into
   // post_field_modification(). We pay this price to avoid slowing
   // down the VM when we aren't watching field modifications.
   // Other access/mutation safe by virtue of being in VM state.
   return (address)(&_field_modification_count);
 }
 ///////////////////////////////////////////////////////////////
 // Functions needed by java.lang.instrument for starting up javaagent.
 ///////////////////////////////////////////////////////////////
 jint
 JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
   // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
   // has already been validated in JNI GetEnv().
   int major, minor, micro;
   // micro version doesn't matter here (yet?)
   decode_version_values(version, &major, &minor, &micro);
   switch (major) {
     case 1:
       switch (minor) {
         case 0:  // version 1.0.<micro> is recognized
         case 1:  // version 1.1.<micro> is recognized
         case 2:  // version 1.2.<micro> is recognized
           break;
         default:
           return JNI_EVERSION;  // unsupported minor version number
       }
       break;
     default:
       return JNI_EVERSION;  // unsupported major version number
   }
   if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
     JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread();
     // transition code: native to VM
     ThreadInVMfromNative __tiv(current_thread);
     VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
     debug_only(VMNativeEntryWrapper __vew;)
     JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
     *penv = jvmti_env->jvmti_external();  // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
     return JNI_OK;
   } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
     // not live, no thread to transition
     JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
     *penv = jvmti_env->jvmti_external();  // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
     return JNI_OK;
   } else {
     // Called at the wrong time
     *penv = NULL;
     return JNI_EDETACHED;
   }
 }
 void
 JvmtiExport::decode_version_values(jint version, int * major, int * minor,
                                    int * micro) {
   *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
   *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
   *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
 }
 void JvmtiExport::enter_primordial_phase() {
   JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
 }
 void JvmtiExport::enter_start_phase() {
   JvmtiManageCapabilities::recompute_always_capabilities();
   JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
 }
 void JvmtiExport::enter_onload_phase() {
   JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
 }
 void JvmtiExport::enter_live_phase() {
   JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
 }
 //
 // JVMTI events that the VM posts to the debugger and also startup agent
 // and call the agent's premain() for java.lang.instrument.
 //
 void JvmtiExport::post_vm_start() {
   EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" ));
   // can now enable some events
   JvmtiEventController::vm_start();
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_VM_START)) {
       EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" ));
       JavaThread *thread  = JavaThread::current();
       JvmtiThreadEventMark jem(thread);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventVMStart callback = env->callbacks()->VMStart;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env());
       }
     }
   }
 }
 void JvmtiExport::post_vm_initialized() {
   EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" ));
   // can now enable events
   JvmtiEventController::vm_init();
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
       EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" ));
       JavaThread *thread  = JavaThread::current();
       JvmtiThreadEventMark jem(thread);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventVMInit callback = env->callbacks()->VMInit;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
       }
     }
   }
 }
 void JvmtiExport::post_vm_death() {
   EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" ));
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
       EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" ));
       JavaThread *thread  = JavaThread::current();
       JvmtiEventMark jem(thread);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env());
       }
     }
   }
   JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
   JvmtiEventController::vm_death();
 }
 char**
 JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
   // Have to grab JVMTI thread state lock to be sure environment doesn't
   // go away while we iterate them.  No locks during VM bring-up.
   if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
     return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
   } else {
     MutexLocker mu(JvmtiThreadState_lock);
     return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
   }
 }
 class JvmtiClassFileLoadHookPoster : public StackObj {
  private:
   Symbol*            _h_name;
   Handle               _class_loader;
   Handle               _h_protection_domain;
   unsigned char **     _data_ptr;
   unsigned char **     _end_ptr;
   JavaThread *         _thread;
   jint                 _curr_len;
   unsigned char *      _curr_data;
   JvmtiEnv *           _curr_env;
   jint *               _cached_length_ptr;
   unsigned char **     _cached_data_ptr;
   JvmtiThreadState *   _state;
   KlassHandle *        _h_class_being_redefined;
   JvmtiClassLoadKind   _load_kind;
  public:
   inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
                                       Handle h_protection_domain,
                                       unsigned char **data_ptr, unsigned char **end_ptr,
                                       unsigned char **cached_data_ptr,
                                       jint *cached_length_ptr) {
     _h_name = h_name;
     _class_loader = class_loader;
     _h_protection_domain = h_protection_domain;
     _data_ptr = data_ptr;
     _end_ptr = end_ptr;
     _thread = JavaThread::current();
     _curr_len = *end_ptr - *data_ptr;
     _curr_data = *data_ptr;
     _curr_env = NULL;
     _cached_length_ptr = cached_length_ptr;
     _cached_data_ptr = cached_data_ptr;
     _state = _thread->jvmti_thread_state();
     if (_state != NULL) {
       _h_class_being_redefined = _state->get_class_being_redefined();
       _load_kind = _state->get_class_load_kind();
       // Clear class_being_redefined flag here. The action
       // from agent handler could generate a new class file load
       // hook event and if it is not cleared the new event generated
       // from regular class file load could have this stale redefined
       // class handle info.
       _state->clear_class_being_redefined();
     } else {
       // redefine and retransform will always set the thread state
       _h_class_being_redefined = (KlassHandle *) NULL;
       _load_kind = jvmti_class_load_kind_load;
     }
   }
   void post() {
 //    EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
 //                   ("JVMTI [%s] class file load hook event triggered",
 //                    JvmtiTrace::safe_get_thread_name(_thread)));
     post_all_envs();
     copy_modified_data();
   }
  private:
   void post_all_envs() {
     if (_load_kind != jvmti_class_load_kind_retransform) {
       // for class load and redefine,
       // call the non-retransformable agents
       JvmtiEnvIterator it;
       for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
         if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
           // non-retransformable agents cannot retransform back,
           // so no need to cache the original class file bytes
           post_to_env(env, false);
         }
       }
     }
     JvmtiEnvIterator it;
     for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
       // retransformable agents get all events
       if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
         // retransformable agents need to cache the original class file
         // bytes if changes are made via the ClassFileLoadHook
         post_to_env(env, true);
       }
     }
   }
   void post_to_env(JvmtiEnv* env, bool caching_needed) {
     unsigned char *new_data = NULL;
     jint new_len = 0;
 //    EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK,
 //     ("JVMTI [%s] class file load hook event sent %s  data_ptr = %d, data_len = %d",
 //               JvmtiTrace::safe_get_thread_name(_thread),
 //               _h_name == NULL ? "NULL" : _h_name->as_utf8(),
 //               _curr_data, _curr_len ));
     JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
                                     _h_protection_domain,
                                     _h_class_being_redefined);
     JvmtiJavaThreadEventTransition jet(_thread);
     JNIEnv* jni_env =  (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)?
                                                         NULL : jem.jni_env();
     jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
     if (callback != NULL) {
       (*callback)(env->jvmti_external(), jni_env,
                   jem.class_being_redefined(),
                   jem.jloader(), jem.class_name(),
                   jem.protection_domain(),
                   _curr_len, _curr_data,
                   &new_len, &new_data);
     }
     if (new_data != NULL) {
       // this agent has modified class data.
       if (caching_needed && *_cached_data_ptr == NULL) {
         // data has been changed by the new retransformable agent
         // and it hasn't already been cached, cache it
         *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len, mtInternal);
         memcpy(*_cached_data_ptr, _curr_data, _curr_len);
         *_cached_length_ptr = _curr_len;
       }
       if (_curr_data != *_data_ptr) {
         // curr_data is previous agent modified class data.
         // And this has been changed by the new agent so
         // we can delete it now.
         _curr_env->Deallocate(_curr_data);
       }
       // Class file data has changed by the current agent.
       _curr_data = new_data;
       _curr_len = new_len;
       // Save the current agent env we need this to deallocate the
       // memory allocated by this agent.
       _curr_env = env;
     }
   }
   void copy_modified_data() {
     // if one of the agent has modified class file data.
     // Copy modified class data to new resources array.
     if (_curr_data != *_data_ptr) {
       *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
       memcpy(*_data_ptr, _curr_data, _curr_len);
       *_end_ptr = *_data_ptr + _curr_len;
       _curr_env->Deallocate(_curr_data);
     }
   }
 };
 bool JvmtiExport::_should_post_class_file_load_hook = false;
 // this entry is for class file load hook on class load, redefine and retransform
 void JvmtiExport::post_class_file_load_hook(Symbol* h_name,
                                             Handle class_loader,
                                             Handle h_protection_domain,
                                             unsigned char **data_ptr,
                                             unsigned char **end_ptr,
                                             unsigned char **cached_data_ptr,
                                             jint *cached_length_ptr) {
   JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
                                       h_protection_domain,
                                       data_ptr, end_ptr,
                                       cached_data_ptr,
                                       cached_length_ptr);
   poster.post();
 }
 void JvmtiExport::report_unsupported(bool on) {
   // If any JVMTI service is turned on, we need to exit before native code
   // tries to access nonexistant services.
   if (on) {
     vm_exit_during_initialization("Java Kernel does not support JVMTI.");
   }
 }
 #ifndef JVMTI_KERNEL
 static inline Klass* oop_to_klass(oop obj) {
   Klass* k = obj->klass();
   // if the object is a java.lang.Class then return the java mirror
   if (k == SystemDictionary::Class_klass()) {
     if (!java_lang_Class::is_primitive(obj)) {
       k = java_lang_Class::as_Klass(obj);
       assert(k != NULL, "class for non-primitive mirror must exist");
     }
   }
   return k;
 }
 class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark  {
  private:
    jobject _jobj;
    jlong    _size;
  public:
    JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
      _jobj = (jobject)to_jobject(obj);
      _size = obj->size() * wordSize;
    };
    jobject jni_jobject() { return _jobj; }
    jlong size() { return _size; }
 };
 class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
  private:
   jint _code_size;
   const void *_code_data;
   jint _map_length;
   jvmtiAddrLocationMap *_map;
   const void *_compile_info;
  public:
   JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
           : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
     _code_data = nm->insts_begin();
     _code_size = nm->insts_size();
     _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
     JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
   }
   ~JvmtiCompiledMethodLoadEventMark() {
      FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal);
   }
   jint code_size() { return _code_size; }
   const void *code_data() { return _code_data; }
   jint map_length() { return _map_length; }
   const jvmtiAddrLocationMap* map() { return _map; }
   const void *compile_info() { return _compile_info; }
 };
 class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
 private:
   jobject _jobj;
 public:
   JvmtiMonitorEventMark(JavaThread *thread, oop object)
           : JvmtiThreadEventMark(thread){
      _jobj = to_jobject(object);
   }
   jobject jni_object() { return _jobj; }
 };
 ///////////////////////////////////////////////////////////////
 //
 // pending CompiledMethodUnload support
 //
 void JvmtiExport::post_compiled_method_unload(
        jmethodID method, const void *code_begin) {
   JavaThread* thread = JavaThread::current();
   EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
                  ("JVMTI [%s] method compile unload event triggered",
                   JvmtiTrace::safe_get_thread_name(thread)));
   // post the event for each environment that has this event enabled.
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
       EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
                 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT,
                  JvmtiTrace::safe_get_thread_name(thread), method));
       ResourceMark rm(thread);
       JvmtiEventMark jem(thread);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), method, code_begin);
       }
     }
   }
 }
 ///////////////////////////////////////////////////////////////
 //
 // JvmtiExport
 //
 void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
     if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
       ThreadState old_os_state = thread->osthread()->get_state();
       thread->osthread()->set_state(BREAKPOINTED);
       EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d",
                      JvmtiTrace::safe_get_thread_name(thread),
                      (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                      (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
                      location - mh()->code_base() ));
       JvmtiEnv *env = ets->get_env();
       JvmtiLocationEventMark jem(thread, mh, location);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                     jem.jni_methodID(), jem.location());
       }
       ets->set_breakpoint_posted();
       thread->osthread()->set_state(old_os_state);
     }
   }
 }
 //////////////////////////////////////////////////////////////////////////////
 bool              JvmtiExport::_can_get_source_debug_extension            = false;
 bool              JvmtiExport::_can_maintain_original_method_order        = false;
 bool              JvmtiExport::_can_post_interpreter_events               = false;
 bool              JvmtiExport::_can_post_on_exceptions                    = false;
 bool              JvmtiExport::_can_post_breakpoint                       = false;
 bool              JvmtiExport::_can_post_field_access                     = false;
 bool              JvmtiExport::_can_post_field_modification               = false;
 bool              JvmtiExport::_can_post_method_entry                     = false;
 bool              JvmtiExport::_can_post_method_exit                      = false;
 bool              JvmtiExport::_can_pop_frame                             = false;
 bool              JvmtiExport::_can_force_early_return                    = false;
 bool              JvmtiExport::_should_post_single_step                   = false;
 bool              JvmtiExport::_should_post_field_access                  = false;
 bool              JvmtiExport::_should_post_field_modification            = false;
 bool              JvmtiExport::_should_post_class_load                    = false;
 bool              JvmtiExport::_should_post_class_prepare                 = false;
 bool              JvmtiExport::_should_post_class_unload                  = false;
 bool              JvmtiExport::_should_post_thread_life                   = false;
 bool              JvmtiExport::_should_clean_up_heap_objects              = false;
 bool              JvmtiExport::_should_post_native_method_bind            = false;
 bool              JvmtiExport::_should_post_dynamic_code_generated        = false;
 bool              JvmtiExport::_should_post_data_dump                     = false;
 bool              JvmtiExport::_should_post_compiled_method_load          = false;
 bool              JvmtiExport::_should_post_compiled_method_unload        = false;
 bool              JvmtiExport::_should_post_monitor_contended_enter       = false;
 bool              JvmtiExport::_should_post_monitor_contended_entered     = false;
 bool              JvmtiExport::_should_post_monitor_wait                  = false;
 bool              JvmtiExport::_should_post_monitor_waited                = false;
 bool              JvmtiExport::_should_post_garbage_collection_start      = false;
 bool              JvmtiExport::_should_post_garbage_collection_finish     = false;
 bool              JvmtiExport::_should_post_object_free                   = false;
 bool              JvmtiExport::_should_post_resource_exhausted            = false;
 bool              JvmtiExport::_should_post_vm_object_alloc               = false;
 bool              JvmtiExport::_should_post_on_exceptions                 = false;
 ////////////////////////////////////////////////////////////////////////////////////////////////
 //
 // JVMTI single step management
 //
 void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
   assert(JvmtiExport::should_post_single_step(), "must be single stepping");
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   // update information about current location and post a step event
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   if (!state->hide_single_stepping()) {
     if (state->is_pending_step_for_popframe()) {
       state->process_pending_step_for_popframe();
     }
     if (state->is_pending_step_for_earlyret()) {
       state->process_pending_step_for_earlyret();
     }
     JvmtiExport::post_single_step(thread, mh(), location);
   }
 }
 void JvmtiExport::expose_single_stepping(JavaThread *thread) {
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state != NULL) {
     state->clear_hide_single_stepping();
   }
 }
 bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
     state->set_hide_single_stepping();
     return true;
   } else {
     return false;
   }
 }
 void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
   HandleMark hm(thread);
   KlassHandle kh(thread, klass);
   EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiThreadState* state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
       EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s",
                                          JvmtiTrace::safe_get_thread_name(thread),
                                          kh()==NULL? "NULL" : kh()->external_name() ));
       JvmtiEnv *env = ets->get_env();
       JvmtiClassEventMark jem(thread, kh());
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
       }
     }
   }
 }
 void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
   HandleMark hm(thread);
   KlassHandle kh(thread, klass);
   EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiThreadState* state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
       EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s",
                                             JvmtiTrace::safe_get_thread_name(thread),
                                             kh()==NULL? "NULL" : kh()->external_name() ));
       JvmtiEnv *env = ets->get_env();
       JvmtiClassEventMark jem(thread, kh());
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
       }
     }
   }
 }
 void JvmtiExport::post_class_unload(Klass* klass) {
   Thread *thread = Thread::current();
   HandleMark hm(thread);
   KlassHandle kh(thread, klass);
   EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" ));
   if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
     assert(thread->is_VM_thread(), "wrong thread");
     // get JavaThread for whom we are proxy
     JavaThread *real_thread =
         (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread();
     JvmtiEnvIterator it;
     for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
       if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
         EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s",
                   kh()==NULL? "NULL" : kh()->external_name() ));
         // do everything manually, since this is a proxy - needs special care
         JNIEnv* jni_env = real_thread->jni_environment();
         jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
         jclass jk = (jclass)JNIHandles::make_local(real_thread, kh()->java_mirror());
         // Before we call the JVMTI agent, we have to set the state in the
         // thread for which we are proxying.
         JavaThreadState prev_state = real_thread->thread_state();
         assert(prev_state == _thread_blocked, "JavaThread should be at safepoint");
         real_thread->set_thread_state(_thread_in_native);
         jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
         if (callback != NULL) {
           (*callback)(env->jvmti_external(), jni_env, jt, jk);
         }
         assert(real_thread->thread_state() == _thread_in_native,
                "JavaThread should be in native");
         real_thread->set_thread_state(prev_state);
         JNIHandles::destroy_local(jk);
         JNIHandles::destroy_local(jt);
       }
     }
   }
 }
 void JvmtiExport::post_thread_start(JavaThread *thread) {
   assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
   EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   // do JVMTI thread initialization (if needed)
   JvmtiEventController::thread_started(thread);
   // Do not post thread start event for hidden java thread.
   if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
       !thread->is_hidden_from_external_view()) {
     JvmtiEnvIterator it;
     for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
       if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
         EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent",
                      JvmtiTrace::safe_get_thread_name(thread) ));
         JvmtiThreadEventMark jem(thread);
         JvmtiJavaThreadEventTransition jet(thread);
         jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
         if (callback != NULL) {
           (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
         }
       }
     }
   }
 }
 void JvmtiExport::post_thread_end(JavaThread *thread) {
   EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   // Do not post thread end event for hidden java thread.
   if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
       !thread->is_hidden_from_external_view()) {
     JvmtiEnvThreadStateIterator it(state);
     for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
       if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
         EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent",
                      JvmtiTrace::safe_get_thread_name(thread) ));
         JvmtiEnv *env = ets->get_env();
         JvmtiThreadEventMark jem(thread);
         JvmtiJavaThreadEventTransition jet(thread);
         jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
         if (callback != NULL) {
           (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
         }
       }
     }
   }
 }
 void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
   assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
   assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
   EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" ));
   EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent"));
   jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
   if (callback != NULL) {
     (*callback)(env->jvmti_external(), tag);
   }
 }
 void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
   EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" ));
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
       EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" ));
       JavaThread *thread  = JavaThread::current();
       JvmtiThreadEventMark jem(thread);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(),
                     resource_exhausted_flags, NULL, description);
       }
     }
   }
 }
 void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s",
                      JvmtiTrace::safe_get_thread_name(thread),
                      (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                      (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
   JvmtiThreadState* state = thread->jvmti_thread_state();
   if (state == NULL || !state->is_interp_only_mode()) {
     // for any thread that actually wants method entry, interp_only_mode is set
     return;
   }
   state->incr_cur_stack_depth();
   if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
     JvmtiEnvThreadStateIterator it(state);
     for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
       if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
         EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s",
                                              JvmtiTrace::safe_get_thread_name(thread),
                                              (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                                              (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
         JvmtiEnv *env = ets->get_env();
         JvmtiMethodEventMark jem(thread, mh);
         JvmtiJavaThreadEventTransition jet(thread);
         jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
         if (callback != NULL) {
           (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
         }
       }
     }
   }
 }
 void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s",
                      JvmtiTrace::safe_get_thread_name(thread),
                      (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                      (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL || !state->is_interp_only_mode()) {
     // for any thread that actually wants method exit, interp_only_mode is set
     return;
   }
   // return a flag when a method terminates by throwing an exception
   // i.e. if an exception is thrown and it's not caught by the current method
   bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
   if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
     Handle result;
     jvalue value;
     value.j = 0L;
     // if the method hasn't been popped because of an exception then we populate
     // the return_value parameter for the callback. At this point we only have
     // the address of a "raw result" and we just call into the interpreter to
     // convert this into a jvalue.
     if (!exception_exit) {
       oop oop_result;
       BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
       if (type == T_OBJECT || type == T_ARRAY) {
         result = Handle(thread, oop_result);
       }
     }
     JvmtiEnvThreadStateIterator it(state);
     for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
       if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
         EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s",
                                             JvmtiTrace::safe_get_thread_name(thread),
                                             (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                                             (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
         JvmtiEnv *env = ets->get_env();
         JvmtiMethodEventMark jem(thread, mh);
         if (result.not_null()) {
           value.l = JNIHandles::make_local(thread, result());
         }
         JvmtiJavaThreadEventTransition jet(thread);
         jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
         if (callback != NULL) {
           (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                       jem.jni_methodID(), exception_exit,  value);
         }
       }
     }
   }
   if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
     JvmtiEnvThreadStateIterator it(state);
     for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
       int cur_frame_number = state->cur_stack_depth();
       if (ets->is_frame_pop(cur_frame_number)) {
         // we have a NotifyFramePop entry for this frame.
         // now check that this env/thread wants this event
         if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
           EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s",
                                             JvmtiTrace::safe_get_thread_name(thread),
                                             (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                                             (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
           // we also need to issue a frame pop event for this frame
           JvmtiEnv *env = ets->get_env();
           JvmtiMethodEventMark jem(thread, mh);
           JvmtiJavaThreadEventTransition jet(thread);
           jvmtiEventFramePop callback = env->callbacks()->FramePop;
           if (callback != NULL) {
             (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                         jem.jni_methodID(), exception_exit);
           }
         }
         // remove the frame's entry
         ets->clear_frame_pop(cur_frame_number);
       }
     }
   }
   state->decr_cur_stack_depth();
 }
 // Todo: inline this for optimization
 void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
     if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
       EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d",
                     JvmtiTrace::safe_get_thread_name(thread),
                     (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                     (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
                     location - mh()->code_base() ));
       JvmtiEnv *env = ets->get_env();
       JvmtiLocationEventMark jem(thread, mh, location);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                     jem.jni_methodID(), jem.location());
       }
       ets->set_single_stepping_posted();
     }
   }
 }
 void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   Handle exception_handle(thread, exception);
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   if (!state->is_exception_detected()) {
     state->set_exception_detected();
     JvmtiEnvThreadStateIterator it(state);
     for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
       if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
         EVT_TRACE(JVMTI_EVENT_EXCEPTION,
                      ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d",
                       JvmtiTrace::safe_get_thread_name(thread),
                       (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                       (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
                       location - mh()->code_base() ));
         JvmtiEnv *env = ets->get_env();
         JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
         // It's okay to clear these exceptions here because we duplicate
         // this lookup in InterpreterRuntime::exception_handler_for_exception.
         EXCEPTION_MARK;
         bool should_repeat;
         vframeStream st(thread);
         assert(!st.at_end(), "cannot be at end");
         Method* current_method = NULL;
         // A GC may occur during the Method::fast_exception_handler_bci_for()
         // call below if it needs to load the constraint class. Using a
         // methodHandle to keep the 'current_method' from being deallocated
         // if GC happens.
         methodHandle current_mh = methodHandle(thread, current_method);
         int current_bci = -1;
         do {
           current_method = st.method();
           current_mh = methodHandle(thread, current_method);
           current_bci = st.bci();
           do {
             should_repeat = false;
             KlassHandle eh_klass(thread, exception_handle()->klass());
             current_bci = Method::fast_exception_handler_bci_for(
               current_mh, eh_klass, current_bci, THREAD);
             if (HAS_PENDING_EXCEPTION) {
               exception_handle = Handle(thread, PENDING_EXCEPTION);
               CLEAR_PENDING_EXCEPTION;
               should_repeat = true;
             }
           } while (should_repeat && (current_bci != -1));
           st.next();
         } while ((current_bci < 0) && (!st.at_end()));
         jmethodID catch_jmethodID;
         if (current_bci < 0) {
           catch_jmethodID = 0;
           current_bci = 0;
         } else {
           catch_jmethodID = jem.to_jmethodID(current_mh);
         }
         JvmtiJavaThreadEventTransition jet(thread);
         jvmtiEventException callback = env->callbacks()->Exception;
         if (callback != NULL) {
           (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                       jem.jni_methodID(), jem.location(),
                       jem.exception(),
                       catch_jmethodID, current_bci);
         }
       }
     }
   }
   // frames may get popped because of this throw, be safe - invalidate cached depth
   state->invalidate_cur_stack_depth();
 }
 void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   Handle exception_handle(thread, exception);
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
                     ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s",
                      JvmtiTrace::safe_get_thread_name(thread),
                      (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                      (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
                      location==0? "no location:" : "",
                      location==0? 0 : location - mh()->code_base(),
                      in_handler_frame? "in handler frame" : "not handler frame" ));
   if (state->is_exception_detected()) {
     state->invalidate_cur_stack_depth();
     if (!in_handler_frame) {
       // Not in exception handler.
       if(state->is_interp_only_mode()) {
         // method exit and frame pop events are posted only in interp mode.
         // When these events are enabled code should be in running in interp mode.
         JvmtiExport::post_method_exit(thread, method, thread->last_frame());
         // The cached cur_stack_depth might have changed from the
         // operations of frame pop or method exit. We are not 100% sure
         // the cached cur_stack_depth is still valid depth so invalidate
         // it.
         state->invalidate_cur_stack_depth();
       }
     } else {
       // In exception handler frame. Report exception catch.
       assert(location != NULL, "must be a known location");
       // Update cur_stack_depth - the frames above the current frame
       // have been unwound due to this exception:
       assert(!state->is_exception_caught(), "exception must not be caught yet.");
       state->set_exception_caught();
       JvmtiEnvThreadStateIterator it(state);
       for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
         if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
           EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
                      ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d",
                       JvmtiTrace::safe_get_thread_name(thread),
                       (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                       (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
                       location - mh()->code_base() ));
           JvmtiEnv *env = ets->get_env();
           JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
           JvmtiJavaThreadEventTransition jet(thread);
           jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
           if (callback != NULL) {
             (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                       jem.jni_methodID(), jem.location(),
                       jem.exception());
           }
         }
       }
     }
   }
 }
 oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
                                     Klass* klass, jfieldID fieldID, bool is_static) {
   if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
     // At least one field access watch is set so we have more work
     // to do. This wrapper is used by entry points that allow us
     // to create handles in post_field_access_by_jni().
     post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
     // event posting can block so refetch oop if we were passed a jobj
     if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
   }
   return obj;
 }
 oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
                                        Klass* klass, jfieldID fieldID, bool is_static) {
   if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
     // At least one field access watch is set so we have more work
     // to do. This wrapper is used by "quick" entry points that don't
     // allow us to create handles in post_field_access_by_jni(). We
     // override that with a ResetNoHandleMark.
     ResetNoHandleMark rnhm;
     post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
     // event posting can block so refetch oop if we were passed a jobj
     if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
   }
   return obj;
 }
 void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
                                            Klass* klass, jfieldID fieldID, bool is_static) {
   // We must be called with a Java context in order to provide reasonable
   // values for the klazz, method, and location fields. The callers of this
   // function don't make the call unless there is a Java context.
   assert(thread->has_last_Java_frame(), "must be called with a Java context");
   ResourceMark rm;
   fieldDescriptor fd;
   // if get_field_descriptor finds fieldID to be invalid, then we just bail
   bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
   assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
   if (!valid_fieldID) return;
   // field accesses are not watched so bail
   if (!fd.is_field_access_watched()) return;
   HandleMark hm(thread);
   KlassHandle h_klass(thread, klass);
   Handle h_obj;
   if (!is_static) {
     // non-static field accessors have an object, but we need a handle
     assert(obj != NULL, "non-static needs an object");
     h_obj = Handle(thread, obj);
   }
   post_field_access(thread,
                     thread->last_frame().interpreter_frame_method(),
                     thread->last_frame().interpreter_frame_bcp(),
                     h_klass, h_obj, fieldID);
 }
 void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
   address location, KlassHandle field_klass, Handle object, jfieldID field) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
       EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d",
                      JvmtiTrace::safe_get_thread_name(thread),
                      (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                      (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
                      location - mh()->code_base() ));
       JvmtiEnv *env = ets->get_env();
       JvmtiLocationEventMark jem(thread, mh, location);
       jclass field_jclass = jem.to_jclass(field_klass());
       jobject field_jobject = jem.to_jobject(object());
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                     jem.jni_methodID(), jem.location(),
                     field_jclass, field_jobject, field);
       }
     }
   }
 }
 oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
                                     Klass* klass, jfieldID fieldID, bool is_static,
                                     char sig_type, jvalue *value) {
   if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
     // At least one field modification watch is set so we have more work
     // to do. This wrapper is used by entry points that allow us
     // to create handles in post_field_modification_by_jni().
     post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
     // event posting can block so refetch oop if we were passed a jobj
     if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
   }
   return obj;
 }
 oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
                                        Klass* klass, jfieldID fieldID, bool is_static,
                                        char sig_type, jvalue *value) {
   if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
     // At least one field modification watch is set so we have more work
     // to do. This wrapper is used by "quick" entry points that don't
     // allow us to create handles in post_field_modification_by_jni(). We
     // override that with a ResetNoHandleMark.
     ResetNoHandleMark rnhm;
     post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
     // event posting can block so refetch oop if we were passed a jobj
     if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
   }
   return obj;
 }
 void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
                                                  Klass* klass, jfieldID fieldID, bool is_static,
                                                  char sig_type, jvalue *value) {
   // We must be called with a Java context in order to provide reasonable
   // values for the klazz, method, and location fields. The callers of this
   // function don't make the call unless there is a Java context.
   assert(thread->has_last_Java_frame(), "must be called with Java context");
   ResourceMark rm;
   fieldDescriptor fd;
   // if get_field_descriptor finds fieldID to be invalid, then we just bail
   bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
   assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
   if (!valid_fieldID) return;
   // field modifications are not watched so bail
   if (!fd.is_field_modification_watched()) return;
   HandleMark hm(thread);
   Handle h_obj;
   if (!is_static) {
     // non-static field accessors have an object, but we need a handle
     assert(obj != NULL, "non-static needs an object");
     h_obj = Handle(thread, obj);
   }
   KlassHandle h_klass(thread, klass);
   post_field_modification(thread,
                           thread->last_frame().interpreter_frame_method(),
                           thread->last_frame().interpreter_frame_bcp(),
                           h_klass, h_obj, fieldID, sig_type, value);
 }
 void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
   address location, KlassHandle field_klass, Handle object, jfieldID field,
   char sig_type, jvalue *value) {
   if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') {
     // 'I' instructions are used for byte, char, short and int.
     // determine which it really is, and convert
     fieldDescriptor fd;
     bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd);
     // should be found (if not, leave as is)
     if (found) {
       jint ival = value->i;
       // convert value from int to appropriate type
       switch (fd.field_type()) {
       case T_BOOLEAN:
         sig_type = 'Z';
         value->i = 0; // clear it
         value->z = (jboolean)ival;
         break;
       case T_BYTE:
         sig_type = 'B';
         value->i = 0; // clear it
         value->b = (jbyte)ival;
         break;
       case T_CHAR:
         sig_type = 'C';
         value->i = 0; // clear it
         value->c = (jchar)ival;
         break;
       case T_SHORT:
         sig_type = 'S';
         value->i = 0; // clear it
         value->s = (jshort)ival;
         break;
       case T_INT:
         // nothing to do
         break;
       default:
         // this is an integer instruction, should be one of above
         ShouldNotReachHere();
         break;
       }
     }
   }
   // convert oop to JNI handle.
   if (sig_type == 'L' || sig_type == '[') {
     value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
   }
   post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
   // Destroy the JNI handle allocated above.
   if (sig_type == 'L') {
     JNIHandles::destroy_local(value->l);
   }
 }
 void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
   address location, KlassHandle field_klass, Handle object, jfieldID field,
   char sig_type, jvalue *value_ptr) {
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
                      ("JVMTI [%s] Trg Field Modification event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
       EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
                    ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d",
                     JvmtiTrace::safe_get_thread_name(thread),
                     (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
                     (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
                     location - mh()->code_base() ));
       JvmtiEnv *env = ets->get_env();
       JvmtiLocationEventMark jem(thread, mh, location);
       jclass field_jclass = jem.to_jclass(field_klass());
       jobject field_jobject = jem.to_jobject(object());
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                     jem.jni_methodID(), jem.location(),
                     field_jclass, field_jobject, field, sig_type, *value_ptr);
       }
     }
   }
 }
 void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
   JavaThread* thread = JavaThread::current();
   assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
   HandleMark hm(thread);
   methodHandle mh(thread, method);
   EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
     JvmtiEnvIterator it;
     for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
       if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
         EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent",
                      JvmtiTrace::safe_get_thread_name(thread) ));
         JvmtiMethodEventMark jem(thread, mh);
         JvmtiJavaThreadEventTransition jet(thread);
         JNIEnv* jni_env =  JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env();
         jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
         if (callback != NULL) {
           (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
                       jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
         }
       }
     }
   }
 }
 // Returns a record containing inlining information for the given nmethod
 jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
   jint numstackframes = 0;
   jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
   record->header.kind = JVMTI_CMLR_INLINE_INFO;
   record->header.next = NULL;
   record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
   record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
   record->numpcs = 0;
   for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
    if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
    record->numpcs++;
   }
   record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
   int scope = 0;
   for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
     if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
     void* pc_address = (void*)p->real_pc(nm);
     assert(pc_address != NULL, "pc_address must be non-null");
     record->pcinfo[scope].pc = pc_address;
     numstackframes=0;
     for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
       numstackframes++;
     }
     assert(numstackframes != 0, "numstackframes must be nonzero.");
     record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
     record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
     record->pcinfo[scope].numstackframes = numstackframes;
     int stackframe = 0;
     for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
       // 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()
       assert(sd->method() != NULL, "sd->method() cannot be null.");
       record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
       record->pcinfo[scope].bcis[stackframe] = sd->bci();
       stackframe++;
     }
     scope++;
   }
   return record;
 }
 void JvmtiExport::post_compiled_method_load(nmethod *nm) {
   JavaThread* thread = JavaThread::current();
   EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
                  ("JVMTI [%s] method compile load event triggered",
                  JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
       EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
                 ("JVMTI [%s] class compile method load event sent %s.%s  ",
                 JvmtiTrace::safe_get_thread_name(thread),
                 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
                 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
       ResourceMark rm(thread);
       HandleMark hm(thread);
       // Add inlining information
       jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
       // Pass inlining information through the void pointer
       JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_methodID(),
                     jem.code_size(), jem.code_data(), jem.map_length(),
                     jem.map(), jem.compile_info());
       }
     }
   }
 }
 // post a COMPILED_METHOD_LOAD event for a given environment
 void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
                                             const void *code_begin, const jint map_length,
                                             const jvmtiAddrLocationMap* map)
 {
   JavaThread* thread = JavaThread::current();
   EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
                  ("JVMTI [%s] method compile load event triggered (by GenerateEvents)",
                  JvmtiTrace::safe_get_thread_name(thread)));
   if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
     EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
               ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
               JvmtiTrace::safe_get_thread_name(thread), method));
     JvmtiEventMark jem(thread);
     JvmtiJavaThreadEventTransition jet(thread);
     jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
     if (callback != NULL) {
       (*callback)(env->jvmti_external(), method,
                   length, code_begin, map_length,
                   map, NULL);
     }
   }
 }
 void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
   assert(name != NULL && name[0] != '\0', "sanity check");
   JavaThread* thread = JavaThread::current();
   // In theory everyone coming thru here is in_vm but we need to be certain
   // because a callee will do a vm->native transition
   ThreadInVMfromUnknown __tiv;
   EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
                  ("JVMTI [%s] method dynamic code generated event triggered",
                  JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
       EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
                 ("JVMTI [%s] dynamic code generated event sent for %s",
                 JvmtiTrace::safe_get_thread_name(thread), name));
       JvmtiEventMark jem(thread);
       JvmtiJavaThreadEventTransition jet(thread);
       jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
       jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
       }
     }
   }
 }
 void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
   jvmtiPhase phase = JvmtiEnv::get_phase();
   if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
     post_dynamic_code_generated_internal(name, code_begin, code_end);
   } else {
     // It may not be safe to post the event from this thread.  Defer all
     // postings to the service thread so that it can perform them in a safe
     // context and in-order.
     MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
     JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
         name, code_begin, code_end);
     JvmtiDeferredEventQueue::enqueue(event);
   }
 }
 // post a DYNAMIC_CODE_GENERATED event for a given environment
 // used by GenerateEvents
 void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
                                               const void *code_begin, const void *code_end)
 {
   JavaThread* thread = JavaThread::current();
   EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
                  ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)",
                   JvmtiTrace::safe_get_thread_name(thread)));
   if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
     EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
               ("JVMTI [%s] dynamic code generated event sent for %s",
                JvmtiTrace::safe_get_thread_name(thread), name));
     JvmtiEventMark jem(thread);
     JvmtiJavaThreadEventTransition jet(thread);
     jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
     jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
     if (callback != NULL) {
       (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
     }
   }
 }
 // post a DynamicCodeGenerated event while holding locks in the VM.
 void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
                                                                   address code_begin, address code_end)
 {
   // register the stub with the current dynamic code event collector
   JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
   // state can only be NULL if the current thread is exiting which
   // should not happen since we're trying to post an event
   guarantee(state != NULL, "attempt to register stub via an exiting thread");
   JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
   guarantee(collector != NULL, "attempt to register stub without event collector");
   collector->register_stub(name, code_begin, code_end);
 }
 // Collect all the vm internally allocated objects which are visible to java world
 void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
   Thread* thread = ThreadLocalStorage::thread();
   if (thread != NULL && thread->is_Java_thread())  {
     // Can not take safepoint here.
     No_Safepoint_Verifier no_sfpt;
     // Can not take safepoint here so can not use state_for to get
     // jvmti thread state.
     JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
     if (state != NULL ) {
       // state is non NULL when VMObjectAllocEventCollector is enabled.
       JvmtiVMObjectAllocEventCollector *collector;
       collector = state->get_vm_object_alloc_event_collector();
       if (collector != NULL && collector->is_enabled()) {
         // Don't record classes as these will be notified via the ClassLoad
         // event.
         if (obj->klass() != SystemDictionary::Class_klass()) {
           collector->record_allocation(obj);
         }
       }
     }
   }
 }
 void JvmtiExport::post_garbage_collection_finish() {
   Thread *thread = Thread::current(); // this event is posted from VM-Thread.
   EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
                  ("JVMTI [%s] garbage collection finish event triggered",
                   JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
       EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
                 ("JVMTI [%s] garbage collection finish event sent ",
                  JvmtiTrace::safe_get_thread_name(thread)));
       JvmtiThreadEventTransition jet(thread);
       // JNIEnv is NULL here because this event is posted from VM Thread
       jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
       if (callback != NULL) {
         (*callback)(env->jvmti_external());
       }
     }
   }
 }
 void JvmtiExport::post_garbage_collection_start() {
   Thread* thread = Thread::current(); // this event is posted from vm-thread.
   EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
                  ("JVMTI [%s] garbage collection start event triggered",
                   JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
       EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
                 ("JVMTI [%s] garbage collection start event sent ",
                  JvmtiTrace::safe_get_thread_name(thread)));
       JvmtiThreadEventTransition jet(thread);
       // JNIEnv is NULL here because this event is posted from VM Thread
       jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
       if (callback != NULL) {
         (*callback)(env->jvmti_external());
       }
     }
   }
 }
 void JvmtiExport::post_data_dump() {
   Thread *thread = Thread::current();
   EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
                  ("JVMTI [%s] data dump request event triggered",
                   JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
       EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
                 ("JVMTI [%s] data dump request event sent ",
                  JvmtiTrace::safe_get_thread_name(thread)));
      JvmtiThreadEventTransition jet(thread);
      // JNIEnv is NULL here because this event is posted from VM Thread
      jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
      if (callback != NULL) {
        (*callback)(env->jvmti_external());
      }
     }
   }
 }
 void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
   oop object = (oop)obj_mntr->object();
   if (!ServiceUtil::visible_oop(object)) {
     // Ignore monitor contended enter for vm internal object.
     return;
   }
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   HandleMark hm(thread);
   Handle h(thread, object);
   EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
                      ("JVMTI [%s] montior contended enter event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
       EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
                    ("JVMTI [%s] monitor contended enter event sent",
                     JvmtiTrace::safe_get_thread_name(thread)));
       JvmtiMonitorEventMark  jem(thread, h());
       JvmtiEnv *env = ets->get_env();
       JvmtiThreadEventTransition jet(thread);
       jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
       }
     }
   }
 }
 void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
   oop object = (oop)obj_mntr->object();
   if (!ServiceUtil::visible_oop(object)) {
     // Ignore monitor contended entered for vm internal object.
     return;
   }
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   HandleMark hm(thread);
   Handle h(thread, object);
   EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
                      ("JVMTI [%s] montior contended entered event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
       EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
                    ("JVMTI [%s] monitor contended enter event sent",
                     JvmtiTrace::safe_get_thread_name(thread)));
       JvmtiMonitorEventMark  jem(thread, h());
       JvmtiEnv *env = ets->get_env();
       JvmtiThreadEventTransition jet(thread);
       jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
       }
     }
   }
 }
 void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
                                           jlong timeout) {
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   HandleMark hm(thread);
   Handle h(thread, object);
   EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
                      ("JVMTI [%s] montior wait event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
       EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
                    ("JVMTI [%s] monitor wait event sent ",
                     JvmtiTrace::safe_get_thread_name(thread)));
       JvmtiMonitorEventMark  jem(thread, h());
       JvmtiEnv *env = ets->get_env();
       JvmtiThreadEventTransition jet(thread);
       jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                     jem.jni_object(), timeout);
       }
     }
   }
 }
 void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
   oop object = (oop)obj_mntr->object();
   if (!ServiceUtil::visible_oop(object)) {
     // Ignore monitor waited for vm internal object.
     return;
   }
   JvmtiThreadState *state = thread->jvmti_thread_state();
   if (state == NULL) {
     return;
   }
   HandleMark hm(thread);
   Handle h(thread, object);
   EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
                      ("JVMTI [%s] montior waited event triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   JvmtiEnvThreadStateIterator it(state);
   for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
     if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
       EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
                    ("JVMTI [%s] monitor waited event sent ",
                     JvmtiTrace::safe_get_thread_name(thread)));
       JvmtiMonitorEventMark  jem(thread, h());
       JvmtiEnv *env = ets->get_env();
       JvmtiThreadEventTransition jet(thread);
       jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                     jem.jni_object(), timed_out);
       }
     }
   }
 }
 void JvmtiExport::post_vm_object_alloc(JavaThread *thread,  oop object) {
   EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered",
                       JvmtiTrace::safe_get_thread_name(thread)));
   if (object == NULL) {
     return;
   }
   HandleMark hm(thread);
   Handle h(thread, object);
   JvmtiEnvIterator it;
   for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
     if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
       EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s",
                                          JvmtiTrace::safe_get_thread_name(thread),
                                          object==NULL? "NULL" : java_lang_Class::as_Klass(object)->external_name()));
       JvmtiVMObjectAllocEventMark jem(thread, h());
       JvmtiJavaThreadEventTransition jet(thread);
       jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
       if (callback != NULL) {
         (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
                     jem.jni_jobject(), jem.jni_class(), jem.size());
       }
     }
   }
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 void JvmtiExport::cleanup_thread(JavaThread* thread) {
   assert(JavaThread::current() == thread, "thread is not current");
   MutexLocker mu(JvmtiThreadState_lock);
   if (thread->jvmti_thread_state() != NULL) {
     // This has to happen after the thread state is removed, which is
     // why it is not in post_thread_end_event like its complement
     // Maybe both these functions should be rolled into the posts?
     JvmtiEventController::thread_ended(thread);
   }
 }
 void JvmtiExport::oops_do(OopClosure* f) {
   JvmtiCurrentBreakpoints::oops_do(f);
   JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
 }
 void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
   JvmtiTagMap::weak_oops_do(is_alive, f);
 }
 void JvmtiExport::gc_epilogue() {
   JvmtiCurrentBreakpoints::gc_epilogue();
 }
 // Onload raw monitor transition.
 void JvmtiExport::transition_pending_onload_raw_monitors() {
   JvmtiPendingMonitors::transition_raw_monitors();
 }
 ////////////////////////////////////////////////////////////////////////////////////////////////
 // type for the Agent_OnAttach entry point
 extern "C" {
   typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
 }
 #ifndef SERVICES_KERNEL
 jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) {
   char ebuf[1024];
   char buffer[JVM_MAXPATHLEN];
   void* library = NULL;
   jint result = JNI_ERR;
   // get agent name and options
   const char* agent = op->arg(0);
   const char* absParam = op->arg(1);
   const char* options = op->arg(2);
   // The abs paramter should be "true" or "false"
   bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
   // If the path is absolute we attempt to load the library. Otherwise we try to
   // load it from the standard dll directory.
   if (is_absolute_path) {
     library = os::dll_load(agent, ebuf, sizeof ebuf);
   } else {
     // Try to load the agent from the standard dll directory
     if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(),
                            agent)) {
       library = os::dll_load(buffer, ebuf, sizeof ebuf);
     }
     if (library == NULL) {
       // not found - try local path
       char ns[1] = {0};
       if (os::dll_build_name(buffer, sizeof(buffer), ns, agent)) {
         library = os::dll_load(buffer, ebuf, sizeof ebuf);
       }
     }
   }
   // If the library was loaded then we attempt to invoke the Agent_OnAttach
   // function
   if (library != NULL) {
     // Lookup the Agent_OnAttach function
     OnAttachEntry_t on_attach_entry = NULL;
     const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
     for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) {
       on_attach_entry =
         CAST_TO_FN_PTR(OnAttachEntry_t, os::dll_lookup(library, on_attach_symbols[symbol_index]));
       if (on_attach_entry != NULL) break;
     }
     if (on_attach_entry == NULL) {
       // Agent_OnAttach missing - unload library
       os::dll_unload(library);
     } else {
       // Invoke the Agent_OnAttach function
       JavaThread* THREAD = JavaThread::current();
       {
         extern struct JavaVM_ main_vm;
         JvmtiThreadEventMark jem(THREAD);
         JvmtiJavaThreadEventTransition jet(THREAD);
         result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
       }
       // Agent_OnAttach may have used JNI
       if (HAS_PENDING_EXCEPTION) {
         CLEAR_PENDING_EXCEPTION;
       }
       // If OnAttach returns JNI_OK then we add it to the list of
       // agent libraries so that we can call Agent_OnUnload later.
       if (result == JNI_OK) {
         Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library);
       }
       // Agent_OnAttach executed so completion status is JNI_OK
       st->print_cr("%d", result);
       result = JNI_OK;
     }
   }
   return result;
 }
 #endif // SERVICES_KERNEL
 ////////////////////////////////////////////////////////////////////////////////////////////////
 // Setup current current thread for event collection.
 void JvmtiEventCollector::setup_jvmti_thread_state() {
   // set this event collector to be the current one.
   JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
   // state can only be NULL if the current thread is exiting which
   // should not happen since we're trying to configure for event collection
   guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
   if (is_vm_object_alloc_event()) {
     _prev = state->get_vm_object_alloc_event_collector();
     state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
   } else if (is_dynamic_code_event()) {
     _prev = state->get_dynamic_code_event_collector();
     state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
   }
 }
 // Unset current event collection in this thread and reset it with previous
 // collector.
 void JvmtiEventCollector::unset_jvmti_thread_state() {
   JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
   if (state != NULL) {
     // restore the previous event collector (if any)
     if (is_vm_object_alloc_event()) {
       if (state->get_vm_object_alloc_event_collector() == this) {
         state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
       } else {
         // this thread's jvmti state was created during the scope of
         // the event collector.
       }
     } else {
       if (is_dynamic_code_event()) {
         if (state->get_dynamic_code_event_collector() == this) {
           state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
         } else {
           // this thread's jvmti state was created during the scope of
           // the event collector.
         }
       }
     }
   }
 }
 // create the dynamic code event collector
 JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
   if (JvmtiExport::should_post_dynamic_code_generated()) {
     setup_jvmti_thread_state();
   }
 }
 // iterate over any code blob descriptors collected and post a
 // DYNAMIC_CODE_GENERATED event to the profiler.
 JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
   assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
  // iterate over any code blob descriptors that we collected
  if (_code_blobs != NULL) {
    for (int i=0; i<_code_blobs->length(); i++) {
      JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
      JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
      FreeHeap(blob);
    }
    delete _code_blobs;
  }
  unset_jvmti_thread_state();
 }
 // register a stub
 void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
  if (_code_blobs == NULL) {
    _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
  }
  _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
 }
 // Setup current thread to record vm allocated objects.
 JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
   if (JvmtiExport::should_post_vm_object_alloc()) {
     _enable = true;
     setup_jvmti_thread_state();
   } else {
     _enable = false;
   }
 }
 // Post vm_object_alloc event for vm allocated objects visible to java
 // world.
 JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
   if (_allocated != NULL) {
     set_enabled(false);
     for (int i = 0; i < _allocated->length(); i++) {
       oop obj = _allocated->at(i);
       if (ServiceUtil::visible_oop(obj)) {
         JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
       }
     }
     delete _allocated;
   }
   unset_jvmti_thread_state();
 }
 void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
   assert(is_enabled(), "VM object alloc event collector is not enabled");
   if (_allocated == NULL) {
     _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
   }
   _allocated->push(obj);
 }
 // GC support.
 void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
   if (_allocated != NULL) {
     for(int i=_allocated->length() - 1; i >= 0; i--) {
       if (_allocated->at(i) != NULL) {
         f->do_oop(_allocated->adr_at(i));
       }
     }
   }
 }
 void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
   // no-op if jvmti not enabled
   if (!JvmtiEnv::environments_might_exist()) {
     return;
   }
   // Runs at safepoint. So no need to acquire Threads_lock.
   for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
     JvmtiThreadState *state = jthr->jvmti_thread_state();
     if (state != NULL) {
       JvmtiVMObjectAllocEventCollector *collector;
       collector = state->get_vm_object_alloc_event_collector();
       while (collector != NULL) {
         collector->oops_do(f);
         collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
       }
     }
   }
 }
 // Disable collection of VMObjectAlloc events
 NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
   // a no-op if VMObjectAlloc event is not enabled
   if (!JvmtiExport::should_post_vm_object_alloc()) {
     return;
   }
   Thread* thread = ThreadLocalStorage::thread();
   if (thread != NULL && thread->is_Java_thread())  {
     JavaThread* current_thread = (JavaThread*)thread;
     JvmtiThreadState *state = current_thread->jvmti_thread_state();
     if (state != NULL) {
       JvmtiVMObjectAllocEventCollector *collector;
       collector = state->get_vm_object_alloc_event_collector();
       if (collector != NULL && collector->is_enabled()) {
         _collector = collector;
         _collector->set_enabled(false);
       }
     }
   }
 }
 // Re-Enable collection of VMObjectAlloc events (if previously enabled)
 NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
   if (was_enabled()) {
     _collector->set_enabled(true);
   }
 };
 JvmtiGCMarker::JvmtiGCMarker() {
   // if there aren't any JVMTI environments then nothing to do
   if (!JvmtiEnv::environments_might_exist()) {
     return;
   }
   if (JvmtiExport::should_post_garbage_collection_start()) {
     JvmtiExport::post_garbage_collection_start();
   }
   if (SafepointSynchronize::is_at_safepoint()) {
     // Do clean up tasks that need to be done at a safepoint
     JvmtiEnvBase::check_for_periodic_clean_up();
   }
 }
 JvmtiGCMarker::~JvmtiGCMarker() {
   // if there aren't any JVMTI environments then nothing to do
   if (!JvmtiEnv::environments_might_exist()) {
     return;
   }
   // JVMTI notify gc finish
   if (JvmtiExport::should_post_garbage_collection_finish()) {
     JvmtiExport::post_garbage_collection_finish();
   }
 }
 #endif // JVMTI_KERNEL

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/prims/jvmtiExport.cpp@db9981fd3124 (annotated)

src/share/vm/prims/jvmtiExport.cpp