diff -r 000000000000 -r f90c822e73f8 src/share/vm/prims/jvmtiExport.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/prims/jvmtiExport.cpp Wed Apr 27 01:25:04 2016 +0800 @@ -0,0 +1,2476 @@ +/* + * Copyright (c) 2003, 2014, 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 "prims/jvmtiRedefineClasses.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 + +PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC + +#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, µ); + switch (major) { + case 1: + switch (minor) { + case 0: // version 1.0. is recognized + case 1: // version 1.1. is recognized + case 2: // version 1.2. 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; + JvmtiCachedClassFileData ** _cached_class_file_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, + JvmtiCachedClassFileData **cache_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_class_file_ptr = cache_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_class_file_ptr == NULL) { + // data has been changed by the new retransformable agent + // and it hasn't already been cached, cache it + JvmtiCachedClassFileData *p; + p = (JvmtiCachedClassFileData *)os::malloc( + offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal); + if (p == NULL) { + vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len, + OOM_MALLOC_ERROR, + "unable to allocate cached copy of original class bytes"); + } + p->length = _curr_len; + memcpy(p->data, _curr_data, _curr_len); + *_cached_class_file_ptr = p; + } + + 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, + JvmtiCachedClassFileData **cache_ptr) { + JvmtiClassFileLoadHookPoster poster(h_name, class_loader, + h_protection_domain, + data_ptr, end_ptr, + cache_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."); + } +} + + +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; + } + } + } + + assert(sig_type != '[', "array should have sig_type == 'L'"); + bool handle_created = false; + + // convert oop to JNI handle. + if (sig_type == 'L') { + handle_created = true; + 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 (handle_created) { + 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 *); +} + +jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) { + char ebuf[1024]; + char buffer[JVM_MAXPATHLEN]; + void* library = NULL; + jint result = JNI_ERR; + const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; + size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols); + + // 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); + + // Initially marked as invalid. It will be set to valid if we can find the agent + AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL); + + // Check for statically linked in agent. If not found then if the path is + // absolute we attempt to load the library. Otherwise we try to load it + // from the standard dll directory. + + if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) { + 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 (library != NULL) { + agent_lib->set_os_lib(library); + agent_lib->set_valid(); + } + } + // If the library was loaded then we attempt to invoke the Agent_OnAttach + // function + if (agent_lib->valid()) { + // Lookup the Agent_OnAttach function + OnAttachEntry_t on_attach_entry = NULL; + on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t, + os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries)); + if (on_attach_entry == NULL) { + // Agent_OnAttach missing - unload library + if (!agent_lib->is_static_lib()) { + os::dll_unload(library); + } + delete agent_lib; + } 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_lib); + } else { + delete agent_lib; + } + + // Agent_OnAttach executed so completion status is JNI_OK + st->print_cr("%d", result); + result = JNI_OK; + } + } + return result; +} + +//////////////////////////////////////////////////////////////////////////////////////////////// + +// 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(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(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(); + } +}