Mercurial > hg > graal-compiler
view src/share/vm/prims/jvmtiExport.cpp @ 2457:527977d4f740
7033779: CodeCache::largest_free_block may need to hold the CodeCache lock
Reviewed-by: kvn
author | never |
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date | Tue, 05 Apr 2011 19:16:52 -0700 |
parents | f91db74a6810 |
children | 0cddebc420d8 |
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/* * Copyright (c) 2003, 2011, 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" #ifndef SERIALGC #include "gc_implementation/parallelScavenge/psMarkSweep.hpp" #endif #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(klassOop klass) { return (klass == NULL ? NULL : (jclass)to_jobject(Klass::cast(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, klassOop 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.<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); __ENTRY(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; *_cached_length_ptr = 0; *_cached_data_ptr = NULL; _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); 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 klassOop oop_to_klassOop(oop obj) { klassOop 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_klassOop(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_klassOop(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); } 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, methodOop 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, methodOop 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, klassOop 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" : Klass::cast(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, klassOop 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" : Klass::cast(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(klassOop 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" : Klass::cast(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, Klass::cast(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, methodOop 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, methodOop 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, methodOop 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, methodOop 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"); methodOop current_method = NULL; int current_bci = -1; do { current_method = st.method(); current_bci = st.bci(); do { should_repeat = false; KlassHandle eh_klass(thread, exception_handle()->klass()); current_bci = current_method->fast_exception_handler_bci_for( eh_klass, current_bci, THREAD); if (HAS_PENDING_EXCEPTION) { exception_handle = KlassHandle(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( methodHandle(thread, current_method)); } 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, methodOop 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, klassOop 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, klassOop 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, klassOop 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, methodOop 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, klassOop 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, klassOop 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, klassOop 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, methodOop 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, methodOop 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(methodOop 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().is_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) { 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" : Klass::cast(java_lang_Class::as_klassOop(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; 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 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}; 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) 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) 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