jvmtiExport.cpp revision 3465:d2a62e0f25eb
1119482Sobrien/* 240269Srnordier * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. 340269Srnordier * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 440269Srnordier * 540269Srnordier * This code is free software; you can redistribute it and/or modify it 640269Srnordier * under the terms of the GNU General Public License version 2 only, as 740269Srnordier * published by the Free Software Foundation. 840269Srnordier * 940269Srnordier * This code is distributed in the hope that it will be useful, but WITHOUT 1040269Srnordier * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1140269Srnordier * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1240269Srnordier * version 2 for more details (a copy is included in the LICENSE file that 1340269Srnordier * accompanied this code). 1440269Srnordier * 1540269Srnordier * You should have received a copy of the GNU General Public License version 16119482Sobrien * 2 along with this work; if not, write to the Free Software Foundation, 17119482Sobrien * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1840269Srnordier * 1940269Srnordier * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2040269Srnordier * or visit www.oracle.com if you need additional information or have any 21104272Sphk * questions. 2240269Srnordier * 23122463Sbde */ 24122463Sbde 2540269Srnordier#include "precompiled.hpp" 2676224Sobrien#include "classfile/systemDictionary.hpp" 2740269Srnordier#include "code/nmethod.hpp" 2840269Srnordier#include "code/pcDesc.hpp" 2940269Srnordier#include "code/scopeDesc.hpp" 3040269Srnordier#include "interpreter/interpreter.hpp" 3140269Srnordier#include "jvmtifiles/jvmtiEnv.hpp" 3240269Srnordier#include "memory/resourceArea.hpp" 3340269Srnordier#include "oops/objArrayKlass.hpp" 3480751Sjhb#include "oops/objArrayOop.hpp" 3540404Srnordier#include "prims/jvmtiCodeBlobEvents.hpp" 3640404Srnordier#include "prims/jvmtiEventController.hpp" 3794411Spb#include "prims/jvmtiEventController.inline.hpp" 3894411Spb#include "prims/jvmtiExport.hpp" 3994411Spb#include "prims/jvmtiImpl.hpp" 4094411Spb#include "prims/jvmtiManageCapabilities.hpp" 4194411Spb#include "prims/jvmtiRawMonitor.hpp" 4240269Srnordier#include "prims/jvmtiTagMap.hpp" 4340269Srnordier#include "prims/jvmtiThreadState.inline.hpp" 44122749Sbde#include "runtime/arguments.hpp" 45122749Sbde#include "runtime/handles.hpp" 46122749Sbde#include "runtime/interfaceSupport.hpp" 4740269Srnordier#include "runtime/objectMonitor.hpp" 4840269Srnordier#include "runtime/objectMonitor.inline.hpp" 49122749Sbde#include "runtime/thread.hpp" 50122749Sbde#include "runtime/vframe.hpp" 51122749Sbde#include "services/attachListener.hpp" 5240269Srnordier#include "services/serviceUtil.hpp" 5340269Srnordier#ifndef SERIALGC 5440404Srnordier#include "gc_implementation/parallelScavenge/psMarkSweep.hpp" 5540269Srnordier#endif 56122749Sbde 5740269Srnordier#ifdef JVMTI_TRACE 5892225Sru#define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; tty->print_cr out; } 59122749Sbde#define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; tty->print_cr out; } 60122749Sbde#else 61122749Sbde#define EVT_TRIG_TRACE(evt,out) 62122749Sbde#define EVT_TRACE(evt,out) 63151382Ssobomax#endif 64151381Ssobomax 65122749Sbde/////////////////////////////////////////////////////////////// 6640404Srnordier// 67122749Sbde// JvmtiEventTransition 6840269Srnordier// 69109197Simp// TO DO -- 70151999Sru// more handle purging 71151999Sru 72151999Sru// Use this for JavaThreads and state is _thread_in_vm. 73151999Sruclass JvmtiJavaThreadEventTransition : StackObj { 74151999Sruprivate: 75151999Sru ResourceMark _rm; 7640404Srnordier ThreadToNativeFromVM _transition; 7740269Srnordier HandleMark _hm; 7840269Srnordier 79148767Sssouhlalpublic: 8040269Srnordier JvmtiJavaThreadEventTransition(JavaThread *thread) : 8142478Speter _rm(), 82151382Ssobomax _transition(thread), 83108000Simp _hm(thread) {}; 8440269Srnordier}; 8540269Srnordier 8640269Srnordier// For JavaThreads which are not in _thread_in_vm state 8740269Srnordier// and other system threads use this. 8840269Srnordierclass JvmtiThreadEventTransition : StackObj { 8940307Srnordierprivate: 9040307Srnordier ResourceMark _rm; 9140307Srnordier HandleMark _hm; 9257090Sru JavaThreadState _saved_state; 93108000Simp JavaThread *_jthread; 9498542Smckusick 95108000Simppublic: 9640307Srnordier JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() { 97151999Sru if (thread->is_Java_thread()) { 98151999Sru _jthread = (JavaThread *)thread; 99151382Ssobomax _saved_state = _jthread->thread_state(); 10040269Srnordier if (_saved_state == _thread_in_Java) { 10140269Srnordier ThreadStateTransition::transition_from_java(_jthread, _thread_in_native); 102151382Ssobomax } else { 10340269Srnordier ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native); 10440404Srnordier } 10540404Srnordier } else { 10640269Srnordier _jthread = NULL; 10740269Srnordier } 10840269Srnordier } 10992225Sru 11093044Spb ~JvmtiThreadEventTransition() { 11192225Sru if (_jthread != NULL) 112151382Ssobomax ThreadStateTransition::transition_from_native(_jthread, _saved_state); 11340269Srnordier } 11440269Srnordier}; 11540269Srnordier 11640269Srnordier 11740269Srnordier/////////////////////////////////////////////////////////////// 118108000Simp// 119108000Simp// JvmtiEventMark 12040269Srnordier// 12140269Srnordier 12240269Srnordierclass JvmtiEventMark : public StackObj { 12340269Srnordierprivate: 12440269Srnordier JavaThread *_thread; 12540269Srnordier JNIEnv* _jni_env; 12640269Srnordier bool _exception_detected; 12740307Srnordier bool _exception_caught; 12840307Srnordier#if 0 12940269Srnordier JNIHandleBlock* _hblock; 13053159Sobrien#endif 13153159Sobrien 132151381Ssobomaxpublic: 133149212Siedowse JvmtiEventMark(JavaThread *thread) : _thread(thread), 13440269Srnordier _jni_env(thread->jni_environment()) { 13594411Spb#if 0 13640269Srnordier _hblock = thread->active_handles(); 13740269Srnordier _hblock->clear_thoroughly(); // so we can be safe 138108000Simp#else 139108000Simp // we want to use the code above - but that needs the JNIHandle changes - later... 14040323Srnordier // for now, steal JNI push local frame code 14140269Srnordier JvmtiThreadState *state = thread->jvmti_thread_state(); 142104679Sphk // we are before an event. 143104679Sphk // Save current jvmti thread exception state. 144108000Simp if (state != NULL) { 14540269Srnordier _exception_detected = state->is_exception_detected(); 14640269Srnordier _exception_caught = state->is_exception_caught(); 14740404Srnordier } else { 14840404Srnordier _exception_detected = false; 14940404Srnordier _exception_caught = false; 15040269Srnordier } 151132864Skan 152126891Strhodes JNIHandleBlock* old_handles = thread->active_handles(); 153132864Skan JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread); 154126891Strhodes assert(new_handles != NULL, "should not be NULL"); 155132864Skan new_handles->set_pop_frame_link(old_handles); 156132864Skan thread->set_active_handles(new_handles); 157132864Skan#endif 158126891Strhodes assert(thread == JavaThread::current(), "thread must be current!"); 159132864Skan thread->frame_anchor()->make_walkable(thread); 160126891Strhodes }; 16162665Sjhb 16262665Sjhb ~JvmtiEventMark() { 16362665Sjhb#if 0 16462665Sjhb _hblock->clear(); // for consistency with future correct behavior 16562665Sjhb#else 166108119Simp // we want to use the code above - but that needs the JNIHandle changes - later... 16762665Sjhb // for now, steal JNI pop local frame code 16862665Sjhb JNIHandleBlock* old_handles = _thread->active_handles(); 16997860Sphk JNIHandleBlock* new_handles = old_handles->pop_frame_link(); 17062665Sjhb assert(new_handles != NULL, "should not be NULL"); 171151382Ssobomax _thread->set_active_handles(new_handles); 17298542Smckusick // Note that we set the pop_frame_link to NULL explicitly, otherwise 17362665Sjhb // the release_block call will release the blocks. 174107889Sobrien old_handles->set_pop_frame_link(NULL); 17598542Smckusick JNIHandleBlock::release_block(old_handles, _thread); // may block 17698542Smckusick#endif 17798542Smckusick 17898542Smckusick JvmtiThreadState* state = _thread->jvmti_thread_state(); 17962665Sjhb // we are continuing after an event. 18062665Sjhb if (state != NULL) { 181108000Simp // Restore the jvmti thread exception state. 182108000Simp if (_exception_detected) { 183108000Simp state->set_exception_detected(); 184108000Simp } 185108000Simp if (_exception_caught) { 186108000Simp state->set_exception_caught(); 187108000Simp } 188108000Simp } 189108000Simp } 19062665Sjhb 191108000Simp#if 0 19262665Sjhb jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); } 19362665Sjhb#else 19462665Sjhb // we want to use the code above - but that needs the JNIHandle changes - later... 19562665Sjhb // for now, use regular make_local 196108000Simp jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); } 19798542Smckusick#endif 19898542Smckusick 19962665Sjhb jclass to_jclass(klassOop klass) { return (klass == NULL ? NULL : (jclass)to_jobject(Klass::cast(klass)->java_mirror())); } 200108005Simp 20198542Smckusick jmethodID to_jmethodID(methodHandle method) { return method->jmethod_id(); } 20262665Sjhb 203108000Simp JNIEnv* jni_env() { return _jni_env; } 20462665Sjhb}; 205108000Simp 206108000Simpclass JvmtiThreadEventMark : public JvmtiEventMark { 207108005Simpprivate: 20862665Sjhb jthread _jt; 20998542Smckusick 21062665Sjhbpublic: 21198542Smckusick JvmtiThreadEventMark(JavaThread *thread) : 21262665Sjhb JvmtiEventMark(thread) { 213108000Simp _jt = (jthread)(to_jobject(thread->threadObj())); 21462665Sjhb }; 215108005Simp jthread jni_thread() { return _jt; } 21662665Sjhb}; 21798542Smckusick 21862665Sjhbclass JvmtiClassEventMark : public JvmtiThreadEventMark { 21962665Sjhbprivate: 22062665Sjhb jclass _jc; 22162665Sjhb 22262665Sjhbpublic: 22362665Sjhb JvmtiClassEventMark(JavaThread *thread, klassOop klass) : 22462665Sjhb JvmtiThreadEventMark(thread) { 22562665Sjhb _jc = to_jclass(klass); 22662665Sjhb }; 22762665Sjhb jclass jni_class() { return _jc; } 22862665Sjhb}; 22940269Srnordier 23040269Srnordierclass JvmtiMethodEventMark : public JvmtiThreadEventMark { 23140269Srnordierprivate: 232107874Sphk jmethodID _mid; 23398542Smckusick 23440269Srnordierpublic: 235104670Sphk JvmtiMethodEventMark(JavaThread *thread, methodHandle method) : 23640323Srnordier JvmtiThreadEventMark(thread), 23740269Srnordier _mid(to_jmethodID(method)) {}; 23857090Sru jmethodID jni_methodID() { return _mid; } 23940307Srnordier}; 24040269Srnordier 24140269Srnordierclass JvmtiLocationEventMark : public JvmtiMethodEventMark { 24240269Srnordierprivate: 243104315Siwasaki jlocation _loc; 244108000Simp 24540269Srnordierpublic: 24694411Spb JvmtiLocationEventMark(JavaThread *thread, methodHandle method, address location) : 24794411Spb JvmtiMethodEventMark(thread, method), 24894411Spb _loc(location - method->code_base()) {}; 24994411Spb jlocation location() { return _loc; } 25098542Smckusick}; 25198542Smckusick 25298542Smckusickclass JvmtiExceptionEventMark : public JvmtiLocationEventMark { 25398542Smckusickprivate: 25440472Srnordier jobject _exc; 255108000Simp 25640472Srnordierpublic: 257151382Ssobomax JvmtiExceptionEventMark(JavaThread *thread, methodHandle method, address location, Handle exception) : 258151382Ssobomax JvmtiLocationEventMark(thread, method, location), 25994411Spb _exc(to_jobject(exception())) {}; 26041013Srnordier jobject exception() { return _exc; } 26140472Srnordier}; 26294411Spb 26394411Spbclass JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark { 26494411Spbprivate: 26594411Spb const char *_class_name; 26694411Spb jobject _jloader; 26794411Spb jobject _protection_domain; 26840472Srnordier jclass _class_being_redefined; 26994411Spb 27094411Spbpublic: 271108000Simp JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name, 27294411Spb Handle class_loader, Handle prot_domain, KlassHandle *class_being_redefined) : JvmtiThreadEventMark(thread) { 27340269Srnordier _class_name = name != NULL? name->as_utf8() : NULL; 27440269Srnordier _jloader = (jobject)to_jobject(class_loader()); 27594411Spb _protection_domain = (jobject)to_jobject(prot_domain()); 27694411Spb if (class_being_redefined == NULL) { 27794411Spb _class_being_redefined = NULL; 27840269Srnordier } else { 279151382Ssobomax _class_being_redefined = (jclass)to_jclass((*class_being_redefined)()); 280151382Ssobomax } 281151382Ssobomax }; 282151382Ssobomax const char *class_name() { 283151382Ssobomax return _class_name; 284151382Ssobomax } 28594411Spb jobject jloader() { 28640404Srnordier return _jloader; 28794411Spb } 288108000Simp jobject protection_domain() { 289151382Ssobomax return _protection_domain; 29040474Srnordier } 29142519Srnordier jclass class_being_redefined() { 292108000Simp return _class_being_redefined; 293107889Sobrien } 29440269Srnordier}; 295108000Simp 29640269Srnordier////////////////////////////////////////////////////////////////////////////// 29740269Srnordier 29840269Srnordierint JvmtiExport::_field_access_count = 0; 29962665Sjhbint JvmtiExport::_field_modification_count = 0; 30040269Srnordier 30140269Srnordierbool JvmtiExport::_can_access_local_variables = false; 30240269Srnordierbool JvmtiExport::_can_hotswap_or_post_breakpoint = false; 30340269Srnordierbool JvmtiExport::_can_modify_any_class = false; 30440269Srnordierbool JvmtiExport::_can_walk_any_space = false; 30540269Srnordier 306108000Simpbool JvmtiExport::_has_redefined_a_class = false; 30740269Srnordierbool JvmtiExport::_all_dependencies_are_recorded = false; 308151381Ssobomax 30940269Srnordier// 31040269Srnordier// field access management 31140269Srnordier// 312151382Ssobomax 313151382Ssobomax// interpreter generator needs the address of the counter 31440269Srnordieraddress JvmtiExport::get_field_access_count_addr() { 31540269Srnordier // We don't grab a lock because we don't want to 31640269Srnordier // serialize field access between all threads. This means that a 31740269Srnordier // thread on another processor can see the wrong count value and 31840269Srnordier // may either miss making a needed call into post_field_access() 319108000Simp // or will make an unneeded call into post_field_access(). We pay 32053159Sobrien // this price to avoid slowing down the VM when we aren't watching 321108000Simp // field accesses. 32240269Srnordier // Other access/mutation safe by virtue of being in VM state. 32340269Srnordier return (address)(&_field_access_count); 32440323Srnordier} 32540269Srnordier 32640269Srnordier// 32740269Srnordier// field modification management 32840269Srnordier// 32940269Srnordier 33040269Srnordier// interpreter generator needs the address of the counter 33140269Srnordieraddress JvmtiExport::get_field_modification_count_addr() { 33240269Srnordier // We don't grab a lock because we don't 33340269Srnordier // want to serialize field modification between all threads. This 33440269Srnordier // means that a thread on another processor can see the wrong 335135410Sjhb // count value and may either miss making a needed call into 33640269Srnordier // post_field_modification() or will make an unneeded call into 33740269Srnordier // post_field_modification(). We pay this price to avoid slowing 33840323Srnordier // down the VM when we aren't watching field modifications. 33940269Srnordier // Other access/mutation safe by virtue of being in VM state. 34040269Srnordier return (address)(&_field_modification_count); 34140323Srnordier} 34240269Srnordier 34341010Srnordier 34440269Srnordier/////////////////////////////////////////////////////////////// 345107889Sobrien// Functions needed by java.lang.instrument for starting up javaagent. 34640269Srnordier/////////////////////////////////////////////////////////////// 34740269Srnordier 34840323Srnordierjint 34940269SrnordierJvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) { 35040269Srnordier // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number 35140323Srnordier // has already been validated in JNI GetEnv(). 35240269Srnordier int major, minor, micro; 35340269Srnordier 35440269Srnordier // micro version doesn't matter here (yet?) 35540269Srnordier decode_version_values(version, &major, &minor, µ); 35640323Srnordier switch (major) { 35740269Srnordier case 1: 35840269Srnordier switch (minor) { 35940269Srnordier case 0: // version 1.0.<micro> is recognized 36040269Srnordier case 1: // version 1.1.<micro> is recognized 36140269Srnordier case 2: // version 1.2.<micro> is recognized 36248034Srnordier break; 36340323Srnordier 36440269Srnordier default: 36540269Srnordier return JNI_EVERSION; // unsupported minor version number 36640269Srnordier } 36740269Srnordier break; 36840269Srnordier default: 369135410Sjhb return JNI_EVERSION; // unsupported major version number 37040269Srnordier } 37140323Srnordier 37240269Srnordier if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) { 37340269Srnordier JavaThread* current_thread = (JavaThread*) ThreadLocalStorage::thread(); 37440269Srnordier // transition code: native to VM 37540269Srnordier ThreadInVMfromNative __tiv(current_thread); 37640269Srnordier VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread) 37740269Srnordier debug_only(VMNativeEntryWrapper __vew;) 37840269Srnordier 37940323Srnordier JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 38040269Srnordier *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 38140269Srnordier return JNI_OK; 382107889Sobrien 38340269Srnordier } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) { 38440269Srnordier // not live, no thread to transition 38540323Srnordier JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version); 38640269Srnordier *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv* 38740269Srnordier return JNI_OK; 38840269Srnordier 38940269Srnordier } else { 390135410Sjhb // Called at the wrong time 39140269Srnordier *penv = NULL; 39240269Srnordier return JNI_EDETACHED; 393108000Simp } 39443113Smsmith} 395151381Ssobomax 39657090Sru 39740307Srnordiervoid 39840269SrnordierJvmtiExport::decode_version_values(jint version, int * major, int * minor, 39940269Srnordier int * micro) { 40040269Srnordier *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR; 401108000Simp *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR; 40240269Srnordier *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO; 403108000Simp} 404149212Siedowse 405149212Siedowsevoid JvmtiExport::enter_primordial_phase() { 406108000Simp JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL); 407149212Siedowse} 40840269Srnordier 40940269Srnordiervoid JvmtiExport::enter_start_phase() { 41061627Sru JvmtiManageCapabilities::recompute_always_capabilities(); 41140269Srnordier JvmtiEnvBase::set_phase(JVMTI_PHASE_START); 41261627Sru} 413149212Siedowse 41440269Srnordiervoid JvmtiExport::enter_onload_phase() { 41540269Srnordier JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD); 41640404Srnordier} 41740269Srnordier 418149212Siedowsevoid JvmtiExport::enter_live_phase() { 419149212Siedowse JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE); 420149212Siedowse} 421149212Siedowse 422151999Sru// 423149212Siedowse// JVMTI events that the VM posts to the debugger and also startup agent 424149212Siedowse// and call the agent's premain() for java.lang.instrument. 425149212Siedowse// 426149212Siedowse 427149212Siedowsevoid JvmtiExport::post_vm_start() { 428149212Siedowse EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Trg VM start event triggered" )); 429149212Siedowse 430149212Siedowse // can now enable some events 431149212Siedowse JvmtiEventController::vm_start(); 432149212Siedowse 433149212Siedowse JvmtiEnvIterator it; 434149212Siedowse for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 435149212Siedowse if (env->is_enabled(JVMTI_EVENT_VM_START)) { 436149212Siedowse EVT_TRACE(JVMTI_EVENT_VM_START, ("JVMTI Evt VM start event sent" )); 43740269Srnordier 43840269Srnordier JavaThread *thread = JavaThread::current(); 43940269Srnordier JvmtiThreadEventMark jem(thread); 440151999Sru JvmtiJavaThreadEventTransition jet(thread); 44140269Srnordier jvmtiEventVMStart callback = env->callbacks()->VMStart; 442151999Sru if (callback != NULL) { 443151999Sru (*callback)(env->jvmti_external(), jem.jni_env()); 44494411Spb } 445149212Siedowse } 44640404Srnordier } 44740269Srnordier} 44840269Srnordier 44940269Srnordier 45040269Srnordiervoid JvmtiExport::post_vm_initialized() { 45140269Srnordier EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Trg VM init event triggered" )); 452108000Simp 453108000Simp // can now enable events 45440269Srnordier JvmtiEventController::vm_init(); 45540269Srnordier 45640269Srnordier JvmtiEnvIterator it; 45740269Srnordier for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 45840269Srnordier if (env->is_enabled(JVMTI_EVENT_VM_INIT)) { 45940314Srnordier EVT_TRACE(JVMTI_EVENT_VM_INIT, ("JVMTI Evt VM init event sent" )); 46040269Srnordier 46140269Srnordier JavaThread *thread = JavaThread::current(); 46240269Srnordier JvmtiThreadEventMark jem(thread); 46340269Srnordier JvmtiJavaThreadEventTransition jet(thread); 464108000Simp jvmtiEventVMInit callback = env->callbacks()->VMInit; 465108000Simp if (callback != NULL) { 46640269Srnordier (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 46740269Srnordier } 46840314Srnordier } 46940269Srnordier } 470108000Simp} 471108000Simp 47240269Srnordier 47340269Srnordiervoid JvmtiExport::post_vm_death() { 47440269Srnordier EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Trg VM death event triggered" )); 475108000Simp 47640269Srnordier JvmtiEnvIterator it; 47740269Srnordier for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 478108000Simp if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) { 479108000Simp EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("JVMTI Evt VM death event sent" )); 48040269Srnordier 48140269Srnordier JavaThread *thread = JavaThread::current(); 48240307Srnordier JvmtiEventMark jem(thread); 48398542Smckusick JvmtiJavaThreadEventTransition jet(thread); 48498542Smckusick jvmtiEventVMDeath callback = env->callbacks()->VMDeath; 48597860Sphk if (callback != NULL) { 48640269Srnordier (*callback)(env->jvmti_external(), jem.jni_env()); 487149212Siedowse } 488107889Sobrien } 48940269Srnordier } 49040269Srnordier 49140269Srnordier JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD); 49240269Srnordier JvmtiEventController::vm_death(); 49340269Srnordier} 49440269Srnordier 49540269Srnordierchar** 49640269SrnordierJvmtiExport::get_all_native_method_prefixes(int* count_ptr) { 49740269Srnordier // Have to grab JVMTI thread state lock to be sure environment doesn't 49840269Srnordier // go away while we iterate them. No locks during VM bring-up. 49940269Srnordier if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) { 50040269Srnordier return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 50140269Srnordier } else { 50240269Srnordier MutexLocker mu(JvmtiThreadState_lock); 50389481Siedowse return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr); 50440269Srnordier } 50540269Srnordier} 50697860Sphk 50789481Siedowseclass JvmtiClassFileLoadHookPoster : public StackObj { 50840307Srnordier private: 50940314Srnordier Symbol* _h_name; 51040314Srnordier Handle _class_loader; 51140314Srnordier Handle _h_protection_domain; 51240269Srnordier unsigned char ** _data_ptr; 51340314Srnordier unsigned char ** _end_ptr; 51440314Srnordier JavaThread * _thread; 51540314Srnordier jint _curr_len; 51640314Srnordier unsigned char * _curr_data; 51740314Srnordier JvmtiEnv * _curr_env; 51840314Srnordier jint * _cached_length_ptr; 51940314Srnordier unsigned char ** _cached_data_ptr; 52040314Srnordier JvmtiThreadState * _state; 52140314Srnordier KlassHandle * _h_class_being_redefined; 52240314Srnordier JvmtiClassLoadKind _load_kind; 52340314Srnordier 52440314Srnordier public: 52540269Srnordier inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader, 52640269Srnordier Handle h_protection_domain, 52740269Srnordier unsigned char **data_ptr, unsigned char **end_ptr, 52840269Srnordier unsigned char **cached_data_ptr, 52940269Srnordier jint *cached_length_ptr) { 53040269Srnordier _h_name = h_name; 53140269Srnordier _class_loader = class_loader; 53240307Srnordier _h_protection_domain = h_protection_domain; 53340269Srnordier _data_ptr = data_ptr; 53440314Srnordier _end_ptr = end_ptr; 53540269Srnordier _thread = JavaThread::current(); 53640307Srnordier _curr_len = *end_ptr - *data_ptr; 53740307Srnordier _curr_data = *data_ptr; 53840307Srnordier _curr_env = NULL; 53940314Srnordier _cached_length_ptr = cached_length_ptr; 54040314Srnordier _cached_data_ptr = cached_data_ptr; 54140269Srnordier 54240307Srnordier _state = _thread->jvmti_thread_state(); 54340307Srnordier if (_state != NULL) { 54440314Srnordier _h_class_being_redefined = _state->get_class_being_redefined(); 54557090Sru _load_kind = _state->get_class_load_kind(); 54640307Srnordier // Clear class_being_redefined flag here. The action 54740307Srnordier // from agent handler could generate a new class file load 54843374Srnordier // hook event and if it is not cleared the new event generated 54943374Srnordier // from regular class file load could have this stale redefined 55040269Srnordier // class handle info. 55140269Srnordier _state->clear_class_being_redefined(); 55240269Srnordier } else { 553104620Sphk // redefine and retransform will always set the thread state 554104620Sphk _h_class_being_redefined = (KlassHandle *) NULL; 55540269Srnordier _load_kind = jvmti_class_load_kind_load; 55640269Srnordier } 55740307Srnordier } 55840269Srnordier 55940269Srnordier void post() { 560104679Sphk// EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, 56140269Srnordier// ("JVMTI [%s] class file load hook event triggered", 56240269Srnordier// JvmtiTrace::safe_get_thread_name(_thread))); 56340269Srnordier post_all_envs(); 56440269Srnordier copy_modified_data(); 56540269Srnordier } 566108000Simp 56740269Srnordier private: 56840269Srnordier void post_all_envs() { 56940269Srnordier if (_load_kind != jvmti_class_load_kind_retransform) { 57040269Srnordier // for class load and redefine, 57140269Srnordier // call the non-retransformable agents 57240269Srnordier JvmtiEnvIterator it; 57340269Srnordier for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 57440269Srnordier if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 57540269Srnordier // non-retransformable agents cannot retransform back, 57640269Srnordier // so no need to cache the original class file bytes 57740269Srnordier post_to_env(env, false); 57840269Srnordier } 57940269Srnordier } 58040269Srnordier } 58140269Srnordier JvmtiEnvIterator it; 58240269Srnordier for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 58340269Srnordier // retransformable agents get all events 58440269Srnordier if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) { 585108000Simp // retransformable agents need to cache the original class file 586108000Simp // bytes if changes are made via the ClassFileLoadHook 58740269Srnordier post_to_env(env, true); 58840269Srnordier } 58940269Srnordier } 59040269Srnordier } 59140269Srnordier 59240269Srnordier void post_to_env(JvmtiEnv* env, bool caching_needed) { 59340269Srnordier unsigned char *new_data = NULL; 59440269Srnordier jint new_len = 0; 595104679Sphk// EVT_TRACE(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, 59640269Srnordier// ("JVMTI [%s] class file load hook event sent %s data_ptr = %d, data_len = %d", 59740269Srnordier// JvmtiTrace::safe_get_thread_name(_thread), 598104679Sphk// _h_name == NULL ? "NULL" : _h_name->as_utf8(), 59940269Srnordier// _curr_data, _curr_len )); 60040269Srnordier JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader, 60140269Srnordier _h_protection_domain, 60240404Srnordier _h_class_being_redefined); 603104679Sphk JvmtiJavaThreadEventTransition jet(_thread); 60440269Srnordier JNIEnv* jni_env = (JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL)? 60540269Srnordier NULL : jem.jni_env(); 60640269Srnordier jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook; 60740269Srnordier if (callback != NULL) { 60840269Srnordier (*callback)(env->jvmti_external(), jni_env, 60940323Srnordier jem.class_being_redefined(), 61040323Srnordier jem.jloader(), jem.class_name(), 611151382Ssobomax jem.protection_domain(), 612151382Ssobomax _curr_len, _curr_data, 61340269Srnordier &new_len, &new_data); 61480751Sjhb } 61541008Srnordier if (new_data != NULL) { 61641008Srnordier // this agent has modified class data. 61741008Srnordier if (caching_needed && *_cached_data_ptr == NULL) { 61841008Srnordier // data has been changed by the new retransformable agent 61941008Srnordier // and it hasn't already been cached, cache it 62040269Srnordier *_cached_data_ptr = (unsigned char *)os::malloc(_curr_len, mtInternal); 62140269Srnordier memcpy(*_cached_data_ptr, _curr_data, _curr_len); 62240269Srnordier *_cached_length_ptr = _curr_len; 623108000Simp } 62440269Srnordier 62540269Srnordier if (_curr_data != *_data_ptr) { 62640269Srnordier // curr_data is previous agent modified class data. 62740269Srnordier // And this has been changed by the new agent so 62840269Srnordier // we can delete it now. 62940269Srnordier _curr_env->Deallocate(_curr_data); 63040269Srnordier } 63140269Srnordier 63240320Srnordier // Class file data has changed by the current agent. 63340269Srnordier _curr_data = new_data; 634151382Ssobomax _curr_len = new_len; 63593044Spb // Save the current agent env we need this to deallocate the 63640320Srnordier // memory allocated by this agent. 63740269Srnordier _curr_env = env; 63840404Srnordier } 63940269Srnordier } 64040320Srnordier 64140320Srnordier void copy_modified_data() { 64240320Srnordier // if one of the agent has modified class file data. 64340320Srnordier // Copy modified class data to new resources array. 64440269Srnordier if (_curr_data != *_data_ptr) { 64540269Srnordier *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len); 64640269Srnordier memcpy(*_data_ptr, _curr_data, _curr_len); 64740269Srnordier *_end_ptr = *_data_ptr + _curr_len; 64840269Srnordier _curr_env->Deallocate(_curr_data); 64940404Srnordier } 65040269Srnordier } 65194411Spb}; 65240404Srnordier 65394411Spbbool JvmtiExport::_should_post_class_file_load_hook = false; 65440404Srnordier 65540404Srnordier// this entry is for class file load hook on class load, redefine and retransform 65640404Srnordiervoid JvmtiExport::post_class_file_load_hook(Symbol* h_name, 65740404Srnordier Handle class_loader, 65840404Srnordier Handle h_protection_domain, 65940404Srnordier unsigned char **data_ptr, 66040404Srnordier unsigned char **end_ptr, 661151382Ssobomax unsigned char **cached_data_ptr, 66293044Spb jint *cached_length_ptr) { 66340404Srnordier JvmtiClassFileLoadHookPoster poster(h_name, class_loader, 66494411Spb h_protection_domain, 66540404Srnordier data_ptr, end_ptr, 66694411Spb cached_data_ptr, 66740404Srnordier cached_length_ptr); 66840404Srnordier poster.post(); 66940404Srnordier} 67040404Srnordier 67140404Srnordiervoid JvmtiExport::report_unsupported(bool on) { 67240404Srnordier // If any JVMTI service is turned on, we need to exit before native code 67340269Srnordier // tries to access nonexistant services. 67440404Srnordier if (on) { 67540269Srnordier vm_exit_during_initialization("Java Kernel does not support JVMTI."); 67640269Srnordier } 67740404Srnordier} 67840269Srnordier 67940404Srnordier 68040269Srnordier#ifndef JVMTI_KERNEL 681static inline klassOop oop_to_klassOop(oop obj) { 682 klassOop k = obj->klass(); 683 684 // if the object is a java.lang.Class then return the java mirror 685 if (k == SystemDictionary::Class_klass()) { 686 if (!java_lang_Class::is_primitive(obj)) { 687 k = java_lang_Class::as_klassOop(obj); 688 assert(k != NULL, "class for non-primitive mirror must exist"); 689 } 690 } 691 return k; 692} 693 694class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark { 695 private: 696 jobject _jobj; 697 jlong _size; 698 public: 699 JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klassOop(obj)) { 700 _jobj = (jobject)to_jobject(obj); 701 _size = obj->size() * wordSize; 702 }; 703 jobject jni_jobject() { return _jobj; } 704 jlong size() { return _size; } 705}; 706 707class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark { 708 private: 709 jint _code_size; 710 const void *_code_data; 711 jint _map_length; 712 jvmtiAddrLocationMap *_map; 713 const void *_compile_info; 714 public: 715 JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL) 716 : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) { 717 _code_data = nm->insts_begin(); 718 _code_size = nm->insts_size(); 719 _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL. 720 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length); 721 } 722 ~JvmtiCompiledMethodLoadEventMark() { 723 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map, mtInternal); 724 } 725 726 jint code_size() { return _code_size; } 727 const void *code_data() { return _code_data; } 728 jint map_length() { return _map_length; } 729 const jvmtiAddrLocationMap* map() { return _map; } 730 const void *compile_info() { return _compile_info; } 731}; 732 733 734 735class JvmtiMonitorEventMark : public JvmtiThreadEventMark { 736private: 737 jobject _jobj; 738public: 739 JvmtiMonitorEventMark(JavaThread *thread, oop object) 740 : JvmtiThreadEventMark(thread){ 741 _jobj = to_jobject(object); 742 } 743 jobject jni_object() { return _jobj; } 744}; 745 746/////////////////////////////////////////////////////////////// 747// 748// pending CompiledMethodUnload support 749// 750 751void JvmtiExport::post_compiled_method_unload( 752 jmethodID method, const void *code_begin) { 753 JavaThread* thread = JavaThread::current(); 754 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 755 ("JVMTI [%s] method compile unload event triggered", 756 JvmtiTrace::safe_get_thread_name(thread))); 757 758 // post the event for each environment that has this event enabled. 759 JvmtiEnvIterator it; 760 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 761 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) { 762 763 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, 764 ("JVMTI [%s] class compile method unload event sent jmethodID " PTR_FORMAT, 765 JvmtiTrace::safe_get_thread_name(thread), method)); 766 767 ResourceMark rm(thread); 768 769 JvmtiEventMark jem(thread); 770 JvmtiJavaThreadEventTransition jet(thread); 771 jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload; 772 if (callback != NULL) { 773 (*callback)(env->jvmti_external(), method, code_begin); 774 } 775 } 776 } 777} 778 779/////////////////////////////////////////////////////////////// 780// 781// JvmtiExport 782// 783 784void JvmtiExport::post_raw_breakpoint(JavaThread *thread, methodOop method, address location) { 785 HandleMark hm(thread); 786 methodHandle mh(thread, method); 787 788 JvmtiThreadState *state = thread->jvmti_thread_state(); 789 if (state == NULL) { 790 return; 791 } 792 EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Trg Breakpoint triggered", 793 JvmtiTrace::safe_get_thread_name(thread))); 794 JvmtiEnvThreadStateIterator it(state); 795 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 796 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT); 797 if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) { 798 ThreadState old_os_state = thread->osthread()->get_state(); 799 thread->osthread()->set_state(BREAKPOINTED); 800 EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("JVMTI [%s] Evt Breakpoint sent %s.%s @ %d", 801 JvmtiTrace::safe_get_thread_name(thread), 802 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 803 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 804 location - mh()->code_base() )); 805 806 JvmtiEnv *env = ets->get_env(); 807 JvmtiLocationEventMark jem(thread, mh, location); 808 JvmtiJavaThreadEventTransition jet(thread); 809 jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint; 810 if (callback != NULL) { 811 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 812 jem.jni_methodID(), jem.location()); 813 } 814 815 ets->set_breakpoint_posted(); 816 thread->osthread()->set_state(old_os_state); 817 } 818 } 819} 820 821////////////////////////////////////////////////////////////////////////////// 822 823bool JvmtiExport::_can_get_source_debug_extension = false; 824bool JvmtiExport::_can_maintain_original_method_order = false; 825bool JvmtiExport::_can_post_interpreter_events = false; 826bool JvmtiExport::_can_post_on_exceptions = false; 827bool JvmtiExport::_can_post_breakpoint = false; 828bool JvmtiExport::_can_post_field_access = false; 829bool JvmtiExport::_can_post_field_modification = false; 830bool JvmtiExport::_can_post_method_entry = false; 831bool JvmtiExport::_can_post_method_exit = false; 832bool JvmtiExport::_can_pop_frame = false; 833bool JvmtiExport::_can_force_early_return = false; 834 835bool JvmtiExport::_should_post_single_step = false; 836bool JvmtiExport::_should_post_field_access = false; 837bool JvmtiExport::_should_post_field_modification = false; 838bool JvmtiExport::_should_post_class_load = false; 839bool JvmtiExport::_should_post_class_prepare = false; 840bool JvmtiExport::_should_post_class_unload = false; 841bool JvmtiExport::_should_post_thread_life = false; 842bool JvmtiExport::_should_clean_up_heap_objects = false; 843bool JvmtiExport::_should_post_native_method_bind = false; 844bool JvmtiExport::_should_post_dynamic_code_generated = false; 845bool JvmtiExport::_should_post_data_dump = false; 846bool JvmtiExport::_should_post_compiled_method_load = false; 847bool JvmtiExport::_should_post_compiled_method_unload = false; 848bool JvmtiExport::_should_post_monitor_contended_enter = false; 849bool JvmtiExport::_should_post_monitor_contended_entered = false; 850bool JvmtiExport::_should_post_monitor_wait = false; 851bool JvmtiExport::_should_post_monitor_waited = false; 852bool JvmtiExport::_should_post_garbage_collection_start = false; 853bool JvmtiExport::_should_post_garbage_collection_finish = false; 854bool JvmtiExport::_should_post_object_free = false; 855bool JvmtiExport::_should_post_resource_exhausted = false; 856bool JvmtiExport::_should_post_vm_object_alloc = false; 857bool JvmtiExport::_should_post_on_exceptions = false; 858 859//////////////////////////////////////////////////////////////////////////////////////////////// 860 861 862// 863// JVMTI single step management 864// 865void JvmtiExport::at_single_stepping_point(JavaThread *thread, methodOop method, address location) { 866 assert(JvmtiExport::should_post_single_step(), "must be single stepping"); 867 868 HandleMark hm(thread); 869 methodHandle mh(thread, method); 870 871 // update information about current location and post a step event 872 JvmtiThreadState *state = thread->jvmti_thread_state(); 873 if (state == NULL) { 874 return; 875 } 876 EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Trg Single Step triggered", 877 JvmtiTrace::safe_get_thread_name(thread))); 878 if (!state->hide_single_stepping()) { 879 if (state->is_pending_step_for_popframe()) { 880 state->process_pending_step_for_popframe(); 881 } 882 if (state->is_pending_step_for_earlyret()) { 883 state->process_pending_step_for_earlyret(); 884 } 885 JvmtiExport::post_single_step(thread, mh(), location); 886 } 887} 888 889 890void JvmtiExport::expose_single_stepping(JavaThread *thread) { 891 JvmtiThreadState *state = thread->jvmti_thread_state(); 892 if (state != NULL) { 893 state->clear_hide_single_stepping(); 894 } 895} 896 897 898bool JvmtiExport::hide_single_stepping(JavaThread *thread) { 899 JvmtiThreadState *state = thread->jvmti_thread_state(); 900 if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 901 state->set_hide_single_stepping(); 902 return true; 903 } else { 904 return false; 905 } 906} 907 908void JvmtiExport::post_class_load(JavaThread *thread, klassOop klass) { 909 HandleMark hm(thread); 910 KlassHandle kh(thread, klass); 911 912 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Trg Class Load triggered", 913 JvmtiTrace::safe_get_thread_name(thread))); 914 JvmtiThreadState* state = thread->jvmti_thread_state(); 915 if (state == NULL) { 916 return; 917 } 918 JvmtiEnvThreadStateIterator it(state); 919 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 920 if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) { 921 EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("JVMTI [%s] Evt Class Load sent %s", 922 JvmtiTrace::safe_get_thread_name(thread), 923 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); 924 925 JvmtiEnv *env = ets->get_env(); 926 JvmtiClassEventMark jem(thread, kh()); 927 JvmtiJavaThreadEventTransition jet(thread); 928 jvmtiEventClassLoad callback = env->callbacks()->ClassLoad; 929 if (callback != NULL) { 930 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 931 } 932 } 933 } 934} 935 936 937void JvmtiExport::post_class_prepare(JavaThread *thread, klassOop klass) { 938 HandleMark hm(thread); 939 KlassHandle kh(thread, klass); 940 941 EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Trg Class Prepare triggered", 942 JvmtiTrace::safe_get_thread_name(thread))); 943 JvmtiThreadState* state = thread->jvmti_thread_state(); 944 if (state == NULL) { 945 return; 946 } 947 JvmtiEnvThreadStateIterator it(state); 948 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 949 if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) { 950 EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("JVMTI [%s] Evt Class Prepare sent %s", 951 JvmtiTrace::safe_get_thread_name(thread), 952 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); 953 954 JvmtiEnv *env = ets->get_env(); 955 JvmtiClassEventMark jem(thread, kh()); 956 JvmtiJavaThreadEventTransition jet(thread); 957 jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare; 958 if (callback != NULL) { 959 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class()); 960 } 961 } 962 } 963} 964 965void JvmtiExport::post_class_unload(klassOop klass) { 966 Thread *thread = Thread::current(); 967 HandleMark hm(thread); 968 KlassHandle kh(thread, klass); 969 970 EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Trg Class Unload triggered" )); 971 if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 972 assert(thread->is_VM_thread(), "wrong thread"); 973 974 // get JavaThread for whom we are proxy 975 JavaThread *real_thread = 976 (JavaThread *)((VMThread *)thread)->vm_operation()->calling_thread(); 977 978 JvmtiEnvIterator it; 979 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 980 if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) { 981 EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("JVMTI [?] Evt Class Unload sent %s", 982 kh()==NULL? "NULL" : Klass::cast(kh())->external_name() )); 983 984 // do everything manually, since this is a proxy - needs special care 985 JNIEnv* jni_env = real_thread->jni_environment(); 986 jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj()); 987 jclass jk = (jclass)JNIHandles::make_local(real_thread, Klass::cast(kh())->java_mirror()); 988 989 // Before we call the JVMTI agent, we have to set the state in the 990 // thread for which we are proxying. 991 JavaThreadState prev_state = real_thread->thread_state(); 992 assert(prev_state == _thread_blocked, "JavaThread should be at safepoint"); 993 real_thread->set_thread_state(_thread_in_native); 994 995 jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload; 996 if (callback != NULL) { 997 (*callback)(env->jvmti_external(), jni_env, jt, jk); 998 } 999 1000 assert(real_thread->thread_state() == _thread_in_native, 1001 "JavaThread should be in native"); 1002 real_thread->set_thread_state(prev_state); 1003 1004 JNIHandles::destroy_local(jk); 1005 JNIHandles::destroy_local(jt); 1006 } 1007 } 1008 } 1009} 1010 1011 1012void JvmtiExport::post_thread_start(JavaThread *thread) { 1013 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1014 1015 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Trg Thread Start event triggered", 1016 JvmtiTrace::safe_get_thread_name(thread))); 1017 1018 // do JVMTI thread initialization (if needed) 1019 JvmtiEventController::thread_started(thread); 1020 1021 // Do not post thread start event for hidden java thread. 1022 if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) && 1023 !thread->is_hidden_from_external_view()) { 1024 JvmtiEnvIterator it; 1025 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1026 if (env->is_enabled(JVMTI_EVENT_THREAD_START)) { 1027 EVT_TRACE(JVMTI_EVENT_THREAD_START, ("JVMTI [%s] Evt Thread Start event sent", 1028 JvmtiTrace::safe_get_thread_name(thread) )); 1029 1030 JvmtiThreadEventMark jem(thread); 1031 JvmtiJavaThreadEventTransition jet(thread); 1032 jvmtiEventThreadStart callback = env->callbacks()->ThreadStart; 1033 if (callback != NULL) { 1034 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1035 } 1036 } 1037 } 1038 } 1039} 1040 1041 1042void JvmtiExport::post_thread_end(JavaThread *thread) { 1043 EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Trg Thread End event triggered", 1044 JvmtiTrace::safe_get_thread_name(thread))); 1045 1046 JvmtiThreadState *state = thread->jvmti_thread_state(); 1047 if (state == NULL) { 1048 return; 1049 } 1050 1051 // Do not post thread end event for hidden java thread. 1052 if (state->is_enabled(JVMTI_EVENT_THREAD_END) && 1053 !thread->is_hidden_from_external_view()) { 1054 1055 JvmtiEnvThreadStateIterator it(state); 1056 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1057 if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) { 1058 EVT_TRACE(JVMTI_EVENT_THREAD_END, ("JVMTI [%s] Evt Thread End event sent", 1059 JvmtiTrace::safe_get_thread_name(thread) )); 1060 1061 JvmtiEnv *env = ets->get_env(); 1062 JvmtiThreadEventMark jem(thread); 1063 JvmtiJavaThreadEventTransition jet(thread); 1064 jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd; 1065 if (callback != NULL) { 1066 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread()); 1067 } 1068 } 1069 } 1070 } 1071} 1072 1073void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) { 1074 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint"); 1075 assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking"); 1076 1077 EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Trg Object Free triggered" )); 1078 EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("JVMTI [?] Evt Object Free sent")); 1079 1080 jvmtiEventObjectFree callback = env->callbacks()->ObjectFree; 1081 if (callback != NULL) { 1082 (*callback)(env->jvmti_external(), tag); 1083 } 1084} 1085 1086void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) { 1087 EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Trg resource exhausted event triggered" )); 1088 1089 JvmtiEnvIterator it; 1090 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1091 if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) { 1092 EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("JVMTI Evt resource exhausted event sent" )); 1093 1094 JavaThread *thread = JavaThread::current(); 1095 JvmtiThreadEventMark jem(thread); 1096 JvmtiJavaThreadEventTransition jet(thread); 1097 jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted; 1098 if (callback != NULL) { 1099 (*callback)(env->jvmti_external(), jem.jni_env(), 1100 resource_exhausted_flags, NULL, description); 1101 } 1102 } 1103 } 1104} 1105 1106void JvmtiExport::post_method_entry(JavaThread *thread, methodOop method, frame current_frame) { 1107 HandleMark hm(thread); 1108 methodHandle mh(thread, method); 1109 1110 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Trg Method Entry triggered %s.%s", 1111 JvmtiTrace::safe_get_thread_name(thread), 1112 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1113 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1114 1115 JvmtiThreadState* state = thread->jvmti_thread_state(); 1116 if (state == NULL || !state->is_interp_only_mode()) { 1117 // for any thread that actually wants method entry, interp_only_mode is set 1118 return; 1119 } 1120 1121 state->incr_cur_stack_depth(); 1122 1123 if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1124 JvmtiEnvThreadStateIterator it(state); 1125 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1126 if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) { 1127 EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("JVMTI [%s] Evt Method Entry sent %s.%s", 1128 JvmtiTrace::safe_get_thread_name(thread), 1129 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1130 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1131 1132 JvmtiEnv *env = ets->get_env(); 1133 JvmtiMethodEventMark jem(thread, mh); 1134 JvmtiJavaThreadEventTransition jet(thread); 1135 jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry; 1136 if (callback != NULL) { 1137 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID()); 1138 } 1139 } 1140 } 1141 } 1142} 1143 1144void JvmtiExport::post_method_exit(JavaThread *thread, methodOop method, frame current_frame) { 1145 HandleMark hm(thread); 1146 methodHandle mh(thread, method); 1147 1148 EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Trg Method Exit triggered %s.%s", 1149 JvmtiTrace::safe_get_thread_name(thread), 1150 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1151 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1152 1153 JvmtiThreadState *state = thread->jvmti_thread_state(); 1154 if (state == NULL || !state->is_interp_only_mode()) { 1155 // for any thread that actually wants method exit, interp_only_mode is set 1156 return; 1157 } 1158 1159 // return a flag when a method terminates by throwing an exception 1160 // i.e. if an exception is thrown and it's not caught by the current method 1161 bool exception_exit = state->is_exception_detected() && !state->is_exception_caught(); 1162 1163 1164 if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1165 Handle result; 1166 jvalue value; 1167 value.j = 0L; 1168 1169 // if the method hasn't been popped because of an exception then we populate 1170 // the return_value parameter for the callback. At this point we only have 1171 // the address of a "raw result" and we just call into the interpreter to 1172 // convert this into a jvalue. 1173 if (!exception_exit) { 1174 oop oop_result; 1175 BasicType type = current_frame.interpreter_frame_result(&oop_result, &value); 1176 if (type == T_OBJECT || type == T_ARRAY) { 1177 result = Handle(thread, oop_result); 1178 } 1179 } 1180 1181 JvmtiEnvThreadStateIterator it(state); 1182 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1183 if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) { 1184 EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("JVMTI [%s] Evt Method Exit sent %s.%s", 1185 JvmtiTrace::safe_get_thread_name(thread), 1186 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1187 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1188 1189 JvmtiEnv *env = ets->get_env(); 1190 JvmtiMethodEventMark jem(thread, mh); 1191 if (result.not_null()) { 1192 value.l = JNIHandles::make_local(thread, result()); 1193 } 1194 JvmtiJavaThreadEventTransition jet(thread); 1195 jvmtiEventMethodExit callback = env->callbacks()->MethodExit; 1196 if (callback != NULL) { 1197 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1198 jem.jni_methodID(), exception_exit, value); 1199 } 1200 } 1201 } 1202 } 1203 1204 if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1205 JvmtiEnvThreadStateIterator it(state); 1206 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1207 int cur_frame_number = state->cur_stack_depth(); 1208 1209 if (ets->is_frame_pop(cur_frame_number)) { 1210 // we have a NotifyFramePop entry for this frame. 1211 // now check that this env/thread wants this event 1212 if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) { 1213 EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("JVMTI [%s] Evt Frame Pop sent %s.%s", 1214 JvmtiTrace::safe_get_thread_name(thread), 1215 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1216 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() )); 1217 1218 // we also need to issue a frame pop event for this frame 1219 JvmtiEnv *env = ets->get_env(); 1220 JvmtiMethodEventMark jem(thread, mh); 1221 JvmtiJavaThreadEventTransition jet(thread); 1222 jvmtiEventFramePop callback = env->callbacks()->FramePop; 1223 if (callback != NULL) { 1224 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1225 jem.jni_methodID(), exception_exit); 1226 } 1227 } 1228 // remove the frame's entry 1229 ets->clear_frame_pop(cur_frame_number); 1230 } 1231 } 1232 } 1233 1234 state->decr_cur_stack_depth(); 1235} 1236 1237 1238// Todo: inline this for optimization 1239void JvmtiExport::post_single_step(JavaThread *thread, methodOop method, address location) { 1240 HandleMark hm(thread); 1241 methodHandle mh(thread, method); 1242 1243 JvmtiThreadState *state = thread->jvmti_thread_state(); 1244 if (state == NULL) { 1245 return; 1246 } 1247 JvmtiEnvThreadStateIterator it(state); 1248 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1249 ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP); 1250 if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) { 1251 EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("JVMTI [%s] Evt Single Step sent %s.%s @ %d", 1252 JvmtiTrace::safe_get_thread_name(thread), 1253 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1254 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1255 location - mh()->code_base() )); 1256 1257 JvmtiEnv *env = ets->get_env(); 1258 JvmtiLocationEventMark jem(thread, mh, location); 1259 JvmtiJavaThreadEventTransition jet(thread); 1260 jvmtiEventSingleStep callback = env->callbacks()->SingleStep; 1261 if (callback != NULL) { 1262 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1263 jem.jni_methodID(), jem.location()); 1264 } 1265 1266 ets->set_single_stepping_posted(); 1267 } 1268 } 1269} 1270 1271 1272void JvmtiExport::post_exception_throw(JavaThread *thread, methodOop method, address location, oop exception) { 1273 HandleMark hm(thread); 1274 methodHandle mh(thread, method); 1275 Handle exception_handle(thread, exception); 1276 1277 JvmtiThreadState *state = thread->jvmti_thread_state(); 1278 if (state == NULL) { 1279 return; 1280 } 1281 1282 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("JVMTI [%s] Trg Exception thrown triggered", 1283 JvmtiTrace::safe_get_thread_name(thread))); 1284 if (!state->is_exception_detected()) { 1285 state->set_exception_detected(); 1286 JvmtiEnvThreadStateIterator it(state); 1287 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1288 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) { 1289 1290 EVT_TRACE(JVMTI_EVENT_EXCEPTION, 1291 ("JVMTI [%s] Evt Exception thrown sent %s.%s @ %d", 1292 JvmtiTrace::safe_get_thread_name(thread), 1293 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1294 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1295 location - mh()->code_base() )); 1296 1297 JvmtiEnv *env = ets->get_env(); 1298 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1299 1300 // It's okay to clear these exceptions here because we duplicate 1301 // this lookup in InterpreterRuntime::exception_handler_for_exception. 1302 EXCEPTION_MARK; 1303 1304 bool should_repeat; 1305 vframeStream st(thread); 1306 assert(!st.at_end(), "cannot be at end"); 1307 methodOop current_method = NULL; 1308 int current_bci = -1; 1309 do { 1310 current_method = st.method(); 1311 current_bci = st.bci(); 1312 do { 1313 should_repeat = false; 1314 KlassHandle eh_klass(thread, exception_handle()->klass()); 1315 current_bci = current_method->fast_exception_handler_bci_for( 1316 eh_klass, current_bci, THREAD); 1317 if (HAS_PENDING_EXCEPTION) { 1318 exception_handle = KlassHandle(thread, PENDING_EXCEPTION); 1319 CLEAR_PENDING_EXCEPTION; 1320 should_repeat = true; 1321 } 1322 } while (should_repeat && (current_bci != -1)); 1323 st.next(); 1324 } while ((current_bci < 0) && (!st.at_end())); 1325 1326 jmethodID catch_jmethodID; 1327 if (current_bci < 0) { 1328 catch_jmethodID = 0; 1329 current_bci = 0; 1330 } else { 1331 catch_jmethodID = jem.to_jmethodID( 1332 methodHandle(thread, current_method)); 1333 } 1334 1335 JvmtiJavaThreadEventTransition jet(thread); 1336 jvmtiEventException callback = env->callbacks()->Exception; 1337 if (callback != NULL) { 1338 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1339 jem.jni_methodID(), jem.location(), 1340 jem.exception(), 1341 catch_jmethodID, current_bci); 1342 } 1343 } 1344 } 1345 } 1346 1347 // frames may get popped because of this throw, be safe - invalidate cached depth 1348 state->invalidate_cur_stack_depth(); 1349} 1350 1351 1352void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, methodOop method, address location, oop exception, bool in_handler_frame) { 1353 HandleMark hm(thread); 1354 methodHandle mh(thread, method); 1355 Handle exception_handle(thread, exception); 1356 1357 JvmtiThreadState *state = thread->jvmti_thread_state(); 1358 if (state == NULL) { 1359 return; 1360 } 1361 EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1362 ("JVMTI [%s] Trg unwind_due_to_exception triggered %s.%s @ %s%d - %s", 1363 JvmtiTrace::safe_get_thread_name(thread), 1364 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1365 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1366 location==0? "no location:" : "", 1367 location==0? 0 : location - mh()->code_base(), 1368 in_handler_frame? "in handler frame" : "not handler frame" )); 1369 1370 if (state->is_exception_detected()) { 1371 1372 state->invalidate_cur_stack_depth(); 1373 if (!in_handler_frame) { 1374 // Not in exception handler. 1375 if(state->is_interp_only_mode()) { 1376 // method exit and frame pop events are posted only in interp mode. 1377 // When these events are enabled code should be in running in interp mode. 1378 JvmtiExport::post_method_exit(thread, method, thread->last_frame()); 1379 // The cached cur_stack_depth might have changed from the 1380 // operations of frame pop or method exit. We are not 100% sure 1381 // the cached cur_stack_depth is still valid depth so invalidate 1382 // it. 1383 state->invalidate_cur_stack_depth(); 1384 } 1385 } else { 1386 // In exception handler frame. Report exception catch. 1387 assert(location != NULL, "must be a known location"); 1388 // Update cur_stack_depth - the frames above the current frame 1389 // have been unwound due to this exception: 1390 assert(!state->is_exception_caught(), "exception must not be caught yet."); 1391 state->set_exception_caught(); 1392 1393 JvmtiEnvThreadStateIterator it(state); 1394 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1395 if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) { 1396 EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH, 1397 ("JVMTI [%s] Evt ExceptionCatch sent %s.%s @ %d", 1398 JvmtiTrace::safe_get_thread_name(thread), 1399 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1400 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1401 location - mh()->code_base() )); 1402 1403 JvmtiEnv *env = ets->get_env(); 1404 JvmtiExceptionEventMark jem(thread, mh, location, exception_handle); 1405 JvmtiJavaThreadEventTransition jet(thread); 1406 jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch; 1407 if (callback != NULL) { 1408 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1409 jem.jni_methodID(), jem.location(), 1410 jem.exception()); 1411 } 1412 } 1413 } 1414 } 1415 } 1416} 1417 1418oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj, 1419 klassOop klass, jfieldID fieldID, bool is_static) { 1420 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1421 // At least one field access watch is set so we have more work 1422 // to do. This wrapper is used by entry points that allow us 1423 // to create handles in post_field_access_by_jni(). 1424 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1425 // event posting can block so refetch oop if we were passed a jobj 1426 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1427 } 1428 return obj; 1429} 1430 1431oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1432 klassOop klass, jfieldID fieldID, bool is_static) { 1433 if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) { 1434 // At least one field access watch is set so we have more work 1435 // to do. This wrapper is used by "quick" entry points that don't 1436 // allow us to create handles in post_field_access_by_jni(). We 1437 // override that with a ResetNoHandleMark. 1438 ResetNoHandleMark rnhm; 1439 post_field_access_by_jni(thread, obj, klass, fieldID, is_static); 1440 // event posting can block so refetch oop if we were passed a jobj 1441 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1442 } 1443 return obj; 1444} 1445 1446void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj, 1447 klassOop klass, jfieldID fieldID, bool is_static) { 1448 // We must be called with a Java context in order to provide reasonable 1449 // values for the klazz, method, and location fields. The callers of this 1450 // function don't make the call unless there is a Java context. 1451 assert(thread->has_last_Java_frame(), "must be called with a Java context"); 1452 1453 ResourceMark rm; 1454 fieldDescriptor fd; 1455 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1456 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1457 assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID"); 1458 if (!valid_fieldID) return; 1459 // field accesses are not watched so bail 1460 if (!fd.is_field_access_watched()) return; 1461 1462 HandleMark hm(thread); 1463 KlassHandle h_klass(thread, klass); 1464 Handle h_obj; 1465 if (!is_static) { 1466 // non-static field accessors have an object, but we need a handle 1467 assert(obj != NULL, "non-static needs an object"); 1468 h_obj = Handle(thread, obj); 1469 } 1470 post_field_access(thread, 1471 thread->last_frame().interpreter_frame_method(), 1472 thread->last_frame().interpreter_frame_bcp(), 1473 h_klass, h_obj, fieldID); 1474} 1475 1476void JvmtiExport::post_field_access(JavaThread *thread, methodOop method, 1477 address location, KlassHandle field_klass, Handle object, jfieldID field) { 1478 1479 HandleMark hm(thread); 1480 methodHandle mh(thread, method); 1481 1482 JvmtiThreadState *state = thread->jvmti_thread_state(); 1483 if (state == NULL) { 1484 return; 1485 } 1486 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Trg Field Access event triggered", 1487 JvmtiTrace::safe_get_thread_name(thread))); 1488 JvmtiEnvThreadStateIterator it(state); 1489 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1490 if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) { 1491 EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("JVMTI [%s] Evt Field Access event sent %s.%s @ %d", 1492 JvmtiTrace::safe_get_thread_name(thread), 1493 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1494 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1495 location - mh()->code_base() )); 1496 1497 JvmtiEnv *env = ets->get_env(); 1498 JvmtiLocationEventMark jem(thread, mh, location); 1499 jclass field_jclass = jem.to_jclass(field_klass()); 1500 jobject field_jobject = jem.to_jobject(object()); 1501 JvmtiJavaThreadEventTransition jet(thread); 1502 jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess; 1503 if (callback != NULL) { 1504 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1505 jem.jni_methodID(), jem.location(), 1506 field_jclass, field_jobject, field); 1507 } 1508 } 1509 } 1510} 1511 1512oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj, 1513 klassOop klass, jfieldID fieldID, bool is_static, 1514 char sig_type, jvalue *value) { 1515 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1516 // At least one field modification watch is set so we have more work 1517 // to do. This wrapper is used by entry points that allow us 1518 // to create handles in post_field_modification_by_jni(). 1519 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1520 // event posting can block so refetch oop if we were passed a jobj 1521 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1522 } 1523 return obj; 1524} 1525 1526oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj, 1527 klassOop klass, jfieldID fieldID, bool is_static, 1528 char sig_type, jvalue *value) { 1529 if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) { 1530 // At least one field modification watch is set so we have more work 1531 // to do. This wrapper is used by "quick" entry points that don't 1532 // allow us to create handles in post_field_modification_by_jni(). We 1533 // override that with a ResetNoHandleMark. 1534 ResetNoHandleMark rnhm; 1535 post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value); 1536 // event posting can block so refetch oop if we were passed a jobj 1537 if (jobj != NULL) return JNIHandles::resolve_non_null(jobj); 1538 } 1539 return obj; 1540} 1541 1542void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj, 1543 klassOop klass, jfieldID fieldID, bool is_static, 1544 char sig_type, jvalue *value) { 1545 // We must be called with a Java context in order to provide reasonable 1546 // values for the klazz, method, and location fields. The callers of this 1547 // function don't make the call unless there is a Java context. 1548 assert(thread->has_last_Java_frame(), "must be called with Java context"); 1549 1550 ResourceMark rm; 1551 fieldDescriptor fd; 1552 // if get_field_descriptor finds fieldID to be invalid, then we just bail 1553 bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd); 1554 assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID"); 1555 if (!valid_fieldID) return; 1556 // field modifications are not watched so bail 1557 if (!fd.is_field_modification_watched()) return; 1558 1559 HandleMark hm(thread); 1560 1561 Handle h_obj; 1562 if (!is_static) { 1563 // non-static field accessors have an object, but we need a handle 1564 assert(obj != NULL, "non-static needs an object"); 1565 h_obj = Handle(thread, obj); 1566 } 1567 KlassHandle h_klass(thread, klass); 1568 post_field_modification(thread, 1569 thread->last_frame().interpreter_frame_method(), 1570 thread->last_frame().interpreter_frame_bcp(), 1571 h_klass, h_obj, fieldID, sig_type, value); 1572} 1573 1574void JvmtiExport::post_raw_field_modification(JavaThread *thread, methodOop method, 1575 address location, KlassHandle field_klass, Handle object, jfieldID field, 1576 char sig_type, jvalue *value) { 1577 1578 if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'C' || sig_type == 'S') { 1579 // 'I' instructions are used for byte, char, short and int. 1580 // determine which it really is, and convert 1581 fieldDescriptor fd; 1582 bool found = JvmtiEnv::get_field_descriptor(field_klass(), field, &fd); 1583 // should be found (if not, leave as is) 1584 if (found) { 1585 jint ival = value->i; 1586 // convert value from int to appropriate type 1587 switch (fd.field_type()) { 1588 case T_BOOLEAN: 1589 sig_type = 'Z'; 1590 value->i = 0; // clear it 1591 value->z = (jboolean)ival; 1592 break; 1593 case T_BYTE: 1594 sig_type = 'B'; 1595 value->i = 0; // clear it 1596 value->b = (jbyte)ival; 1597 break; 1598 case T_CHAR: 1599 sig_type = 'C'; 1600 value->i = 0; // clear it 1601 value->c = (jchar)ival; 1602 break; 1603 case T_SHORT: 1604 sig_type = 'S'; 1605 value->i = 0; // clear it 1606 value->s = (jshort)ival; 1607 break; 1608 case T_INT: 1609 // nothing to do 1610 break; 1611 default: 1612 // this is an integer instruction, should be one of above 1613 ShouldNotReachHere(); 1614 break; 1615 } 1616 } 1617 } 1618 1619 // convert oop to JNI handle. 1620 if (sig_type == 'L' || sig_type == '[') { 1621 value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l); 1622 } 1623 1624 post_field_modification(thread, method, location, field_klass, object, field, sig_type, value); 1625 1626 // Destroy the JNI handle allocated above. 1627 if (sig_type == 'L') { 1628 JNIHandles::destroy_local(value->l); 1629 } 1630} 1631 1632void JvmtiExport::post_field_modification(JavaThread *thread, methodOop method, 1633 address location, KlassHandle field_klass, Handle object, jfieldID field, 1634 char sig_type, jvalue *value_ptr) { 1635 1636 HandleMark hm(thread); 1637 methodHandle mh(thread, method); 1638 1639 JvmtiThreadState *state = thread->jvmti_thread_state(); 1640 if (state == NULL) { 1641 return; 1642 } 1643 EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1644 ("JVMTI [%s] Trg Field Modification event triggered", 1645 JvmtiTrace::safe_get_thread_name(thread))); 1646 1647 JvmtiEnvThreadStateIterator it(state); 1648 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1649 if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) { 1650 EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION, 1651 ("JVMTI [%s] Evt Field Modification event sent %s.%s @ %d", 1652 JvmtiTrace::safe_get_thread_name(thread), 1653 (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(), 1654 (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(), 1655 location - mh()->code_base() )); 1656 1657 JvmtiEnv *env = ets->get_env(); 1658 JvmtiLocationEventMark jem(thread, mh, location); 1659 jclass field_jclass = jem.to_jclass(field_klass()); 1660 jobject field_jobject = jem.to_jobject(object()); 1661 JvmtiJavaThreadEventTransition jet(thread); 1662 jvmtiEventFieldModification callback = env->callbacks()->FieldModification; 1663 if (callback != NULL) { 1664 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 1665 jem.jni_methodID(), jem.location(), 1666 field_jclass, field_jobject, field, sig_type, *value_ptr); 1667 } 1668 } 1669 } 1670} 1671 1672void JvmtiExport::post_native_method_bind(methodOop method, address* function_ptr) { 1673 JavaThread* thread = JavaThread::current(); 1674 assert(thread->thread_state() == _thread_in_vm, "must be in vm state"); 1675 1676 HandleMark hm(thread); 1677 methodHandle mh(thread, method); 1678 1679 EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Trg Native Method Bind event triggered", 1680 JvmtiTrace::safe_get_thread_name(thread))); 1681 1682 if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1683 JvmtiEnvIterator it; 1684 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1685 if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) { 1686 EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("JVMTI [%s] Evt Native Method Bind event sent", 1687 JvmtiTrace::safe_get_thread_name(thread) )); 1688 1689 JvmtiMethodEventMark jem(thread, mh); 1690 JvmtiJavaThreadEventTransition jet(thread); 1691 JNIEnv* jni_env = JvmtiEnv::get_phase() == JVMTI_PHASE_PRIMORDIAL? NULL : jem.jni_env(); 1692 jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind; 1693 if (callback != NULL) { 1694 (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(), 1695 jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr); 1696 } 1697 } 1698 } 1699 } 1700} 1701 1702// Returns a record containing inlining information for the given nmethod 1703jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) { 1704 jint numstackframes = 0; 1705 jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord); 1706 record->header.kind = JVMTI_CMLR_INLINE_INFO; 1707 record->header.next = NULL; 1708 record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1; 1709 record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0; 1710 record->numpcs = 0; 1711 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1712 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1713 record->numpcs++; 1714 } 1715 record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs)); 1716 int scope = 0; 1717 for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) { 1718 if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue; 1719 void* pc_address = (void*)p->real_pc(nm); 1720 assert(pc_address != NULL, "pc_address must be non-null"); 1721 record->pcinfo[scope].pc = pc_address; 1722 numstackframes=0; 1723 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1724 numstackframes++; 1725 } 1726 assert(numstackframes != 0, "numstackframes must be nonzero."); 1727 record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes); 1728 record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes); 1729 record->pcinfo[scope].numstackframes = numstackframes; 1730 int stackframe = 0; 1731 for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) { 1732 // 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() 1733 assert(!sd->method().is_null(), "sd->method() cannot be null."); 1734 record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id(); 1735 record->pcinfo[scope].bcis[stackframe] = sd->bci(); 1736 stackframe++; 1737 } 1738 scope++; 1739 } 1740 return record; 1741} 1742 1743void JvmtiExport::post_compiled_method_load(nmethod *nm) { 1744 JavaThread* thread = JavaThread::current(); 1745 1746 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1747 ("JVMTI [%s] method compile load event triggered", 1748 JvmtiTrace::safe_get_thread_name(thread))); 1749 1750 JvmtiEnvIterator it; 1751 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1752 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1753 1754 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1755 ("JVMTI [%s] class compile method load event sent %s.%s ", 1756 JvmtiTrace::safe_get_thread_name(thread), 1757 (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(), 1758 (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string())); 1759 ResourceMark rm(thread); 1760 HandleMark hm(thread); 1761 1762 // Add inlining information 1763 jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm); 1764 // Pass inlining information through the void pointer 1765 JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord); 1766 JvmtiJavaThreadEventTransition jet(thread); 1767 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1768 if (callback != NULL) { 1769 (*callback)(env->jvmti_external(), jem.jni_methodID(), 1770 jem.code_size(), jem.code_data(), jem.map_length(), 1771 jem.map(), jem.compile_info()); 1772 } 1773 } 1774 } 1775} 1776 1777 1778// post a COMPILED_METHOD_LOAD event for a given environment 1779void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, 1780 const void *code_begin, const jint map_length, 1781 const jvmtiAddrLocationMap* map) 1782{ 1783 JavaThread* thread = JavaThread::current(); 1784 EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1785 ("JVMTI [%s] method compile load event triggered (by GenerateEvents)", 1786 JvmtiTrace::safe_get_thread_name(thread))); 1787 if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) { 1788 1789 EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD, 1790 ("JVMTI [%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT, 1791 JvmtiTrace::safe_get_thread_name(thread), method)); 1792 1793 JvmtiEventMark jem(thread); 1794 JvmtiJavaThreadEventTransition jet(thread); 1795 jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad; 1796 if (callback != NULL) { 1797 (*callback)(env->jvmti_external(), method, 1798 length, code_begin, map_length, 1799 map, NULL); 1800 } 1801 } 1802} 1803 1804void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) { 1805 assert(name != NULL && name[0] != '\0', "sanity check"); 1806 1807 JavaThread* thread = JavaThread::current(); 1808 // In theory everyone coming thru here is in_vm but we need to be certain 1809 // because a callee will do a vm->native transition 1810 ThreadInVMfromUnknown __tiv; 1811 1812 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1813 ("JVMTI [%s] method dynamic code generated event triggered", 1814 JvmtiTrace::safe_get_thread_name(thread))); 1815 JvmtiEnvIterator it; 1816 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1817 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1818 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1819 ("JVMTI [%s] dynamic code generated event sent for %s", 1820 JvmtiTrace::safe_get_thread_name(thread), name)); 1821 JvmtiEventMark jem(thread); 1822 JvmtiJavaThreadEventTransition jet(thread); 1823 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1824 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1825 if (callback != NULL) { 1826 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1827 } 1828 } 1829 } 1830} 1831 1832void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) { 1833 jvmtiPhase phase = JvmtiEnv::get_phase(); 1834 if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) { 1835 post_dynamic_code_generated_internal(name, code_begin, code_end); 1836 } else { 1837 // It may not be safe to post the event from this thread. Defer all 1838 // postings to the service thread so that it can perform them in a safe 1839 // context and in-order. 1840 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); 1841 JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event( 1842 name, code_begin, code_end); 1843 JvmtiDeferredEventQueue::enqueue(event); 1844 } 1845} 1846 1847 1848// post a DYNAMIC_CODE_GENERATED event for a given environment 1849// used by GenerateEvents 1850void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name, 1851 const void *code_begin, const void *code_end) 1852{ 1853 JavaThread* thread = JavaThread::current(); 1854 EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1855 ("JVMTI [%s] dynamic code generated event triggered (by GenerateEvents)", 1856 JvmtiTrace::safe_get_thread_name(thread))); 1857 if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) { 1858 EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED, 1859 ("JVMTI [%s] dynamic code generated event sent for %s", 1860 JvmtiTrace::safe_get_thread_name(thread), name)); 1861 JvmtiEventMark jem(thread); 1862 JvmtiJavaThreadEventTransition jet(thread); 1863 jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char)); 1864 jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated; 1865 if (callback != NULL) { 1866 (*callback)(env->jvmti_external(), name, (void*)code_begin, length); 1867 } 1868 } 1869} 1870 1871// post a DynamicCodeGenerated event while holding locks in the VM. 1872void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name, 1873 address code_begin, address code_end) 1874{ 1875 // register the stub with the current dynamic code event collector 1876 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 1877 // state can only be NULL if the current thread is exiting which 1878 // should not happen since we're trying to post an event 1879 guarantee(state != NULL, "attempt to register stub via an exiting thread"); 1880 JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector(); 1881 guarantee(collector != NULL, "attempt to register stub without event collector"); 1882 collector->register_stub(name, code_begin, code_end); 1883} 1884 1885// Collect all the vm internally allocated objects which are visible to java world 1886void JvmtiExport::record_vm_internal_object_allocation(oop obj) { 1887 Thread* thread = ThreadLocalStorage::thread(); 1888 if (thread != NULL && thread->is_Java_thread()) { 1889 // Can not take safepoint here. 1890 No_Safepoint_Verifier no_sfpt; 1891 // Can not take safepoint here so can not use state_for to get 1892 // jvmti thread state. 1893 JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state(); 1894 if (state != NULL ) { 1895 // state is non NULL when VMObjectAllocEventCollector is enabled. 1896 JvmtiVMObjectAllocEventCollector *collector; 1897 collector = state->get_vm_object_alloc_event_collector(); 1898 if (collector != NULL && collector->is_enabled()) { 1899 // Don't record classes as these will be notified via the ClassLoad 1900 // event. 1901 if (obj->klass() != SystemDictionary::Class_klass()) { 1902 collector->record_allocation(obj); 1903 } 1904 } 1905 } 1906 } 1907} 1908 1909void JvmtiExport::post_garbage_collection_finish() { 1910 Thread *thread = Thread::current(); // this event is posted from VM-Thread. 1911 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 1912 ("JVMTI [%s] garbage collection finish event triggered", 1913 JvmtiTrace::safe_get_thread_name(thread))); 1914 JvmtiEnvIterator it; 1915 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1916 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) { 1917 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, 1918 ("JVMTI [%s] garbage collection finish event sent ", 1919 JvmtiTrace::safe_get_thread_name(thread))); 1920 JvmtiThreadEventTransition jet(thread); 1921 // JNIEnv is NULL here because this event is posted from VM Thread 1922 jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish; 1923 if (callback != NULL) { 1924 (*callback)(env->jvmti_external()); 1925 } 1926 } 1927 } 1928} 1929 1930void JvmtiExport::post_garbage_collection_start() { 1931 Thread* thread = Thread::current(); // this event is posted from vm-thread. 1932 EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 1933 ("JVMTI [%s] garbage collection start event triggered", 1934 JvmtiTrace::safe_get_thread_name(thread))); 1935 JvmtiEnvIterator it; 1936 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1937 if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) { 1938 EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START, 1939 ("JVMTI [%s] garbage collection start event sent ", 1940 JvmtiTrace::safe_get_thread_name(thread))); 1941 JvmtiThreadEventTransition jet(thread); 1942 // JNIEnv is NULL here because this event is posted from VM Thread 1943 jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart; 1944 if (callback != NULL) { 1945 (*callback)(env->jvmti_external()); 1946 } 1947 } 1948 } 1949} 1950 1951void JvmtiExport::post_data_dump() { 1952 Thread *thread = Thread::current(); 1953 EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 1954 ("JVMTI [%s] data dump request event triggered", 1955 JvmtiTrace::safe_get_thread_name(thread))); 1956 JvmtiEnvIterator it; 1957 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 1958 if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) { 1959 EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST, 1960 ("JVMTI [%s] data dump request event sent ", 1961 JvmtiTrace::safe_get_thread_name(thread))); 1962 JvmtiThreadEventTransition jet(thread); 1963 // JNIEnv is NULL here because this event is posted from VM Thread 1964 jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest; 1965 if (callback != NULL) { 1966 (*callback)(env->jvmti_external()); 1967 } 1968 } 1969 } 1970} 1971 1972void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) { 1973 oop object = (oop)obj_mntr->object(); 1974 if (!ServiceUtil::visible_oop(object)) { 1975 // Ignore monitor contended enter for vm internal object. 1976 return; 1977 } 1978 JvmtiThreadState *state = thread->jvmti_thread_state(); 1979 if (state == NULL) { 1980 return; 1981 } 1982 1983 HandleMark hm(thread); 1984 Handle h(thread, object); 1985 1986 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 1987 ("JVMTI [%s] montior contended enter event triggered", 1988 JvmtiTrace::safe_get_thread_name(thread))); 1989 1990 JvmtiEnvThreadStateIterator it(state); 1991 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 1992 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) { 1993 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, 1994 ("JVMTI [%s] monitor contended enter event sent", 1995 JvmtiTrace::safe_get_thread_name(thread))); 1996 JvmtiMonitorEventMark jem(thread, h()); 1997 JvmtiEnv *env = ets->get_env(); 1998 JvmtiThreadEventTransition jet(thread); 1999 jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter; 2000 if (callback != NULL) { 2001 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2002 } 2003 } 2004 } 2005} 2006 2007void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) { 2008 oop object = (oop)obj_mntr->object(); 2009 if (!ServiceUtil::visible_oop(object)) { 2010 // Ignore monitor contended entered for vm internal object. 2011 return; 2012 } 2013 JvmtiThreadState *state = thread->jvmti_thread_state(); 2014 if (state == NULL) { 2015 return; 2016 } 2017 2018 HandleMark hm(thread); 2019 Handle h(thread, object); 2020 2021 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2022 ("JVMTI [%s] montior contended entered event triggered", 2023 JvmtiTrace::safe_get_thread_name(thread))); 2024 2025 JvmtiEnvThreadStateIterator it(state); 2026 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2027 if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) { 2028 EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, 2029 ("JVMTI [%s] monitor contended enter event sent", 2030 JvmtiTrace::safe_get_thread_name(thread))); 2031 JvmtiMonitorEventMark jem(thread, h()); 2032 JvmtiEnv *env = ets->get_env(); 2033 JvmtiThreadEventTransition jet(thread); 2034 jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered; 2035 if (callback != NULL) { 2036 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object()); 2037 } 2038 } 2039 } 2040} 2041 2042void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object, 2043 jlong timeout) { 2044 JvmtiThreadState *state = thread->jvmti_thread_state(); 2045 if (state == NULL) { 2046 return; 2047 } 2048 2049 HandleMark hm(thread); 2050 Handle h(thread, object); 2051 2052 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2053 ("JVMTI [%s] montior wait event triggered", 2054 JvmtiTrace::safe_get_thread_name(thread))); 2055 2056 JvmtiEnvThreadStateIterator it(state); 2057 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2058 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) { 2059 EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT, 2060 ("JVMTI [%s] monitor wait event sent ", 2061 JvmtiTrace::safe_get_thread_name(thread))); 2062 JvmtiMonitorEventMark jem(thread, h()); 2063 JvmtiEnv *env = ets->get_env(); 2064 JvmtiThreadEventTransition jet(thread); 2065 jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait; 2066 if (callback != NULL) { 2067 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2068 jem.jni_object(), timeout); 2069 } 2070 } 2071 } 2072} 2073 2074void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) { 2075 oop object = (oop)obj_mntr->object(); 2076 if (!ServiceUtil::visible_oop(object)) { 2077 // Ignore monitor waited for vm internal object. 2078 return; 2079 } 2080 JvmtiThreadState *state = thread->jvmti_thread_state(); 2081 if (state == NULL) { 2082 return; 2083 } 2084 2085 HandleMark hm(thread); 2086 Handle h(thread, object); 2087 2088 EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2089 ("JVMTI [%s] montior waited event triggered", 2090 JvmtiTrace::safe_get_thread_name(thread))); 2091 2092 JvmtiEnvThreadStateIterator it(state); 2093 for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) { 2094 if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) { 2095 EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED, 2096 ("JVMTI [%s] monitor waited event sent ", 2097 JvmtiTrace::safe_get_thread_name(thread))); 2098 JvmtiMonitorEventMark jem(thread, h()); 2099 JvmtiEnv *env = ets->get_env(); 2100 JvmtiThreadEventTransition jet(thread); 2101 jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited; 2102 if (callback != NULL) { 2103 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2104 jem.jni_object(), timed_out); 2105 } 2106 } 2107 } 2108} 2109 2110 2111void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) { 2112 EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Trg vm object alloc triggered", 2113 JvmtiTrace::safe_get_thread_name(thread))); 2114 if (object == NULL) { 2115 return; 2116 } 2117 HandleMark hm(thread); 2118 Handle h(thread, object); 2119 JvmtiEnvIterator it; 2120 for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) { 2121 if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) { 2122 EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("JVMTI [%s] Evt vmobject alloc sent %s", 2123 JvmtiTrace::safe_get_thread_name(thread), 2124 object==NULL? "NULL" : Klass::cast(java_lang_Class::as_klassOop(object))->external_name())); 2125 2126 JvmtiVMObjectAllocEventMark jem(thread, h()); 2127 JvmtiJavaThreadEventTransition jet(thread); 2128 jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc; 2129 if (callback != NULL) { 2130 (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), 2131 jem.jni_jobject(), jem.jni_class(), jem.size()); 2132 } 2133 } 2134 } 2135} 2136 2137//////////////////////////////////////////////////////////////////////////////////////////////// 2138 2139void JvmtiExport::cleanup_thread(JavaThread* thread) { 2140 assert(JavaThread::current() == thread, "thread is not current"); 2141 MutexLocker mu(JvmtiThreadState_lock); 2142 2143 if (thread->jvmti_thread_state() != NULL) { 2144 // This has to happen after the thread state is removed, which is 2145 // why it is not in post_thread_end_event like its complement 2146 // Maybe both these functions should be rolled into the posts? 2147 JvmtiEventController::thread_ended(thread); 2148 } 2149} 2150 2151void JvmtiExport::oops_do(OopClosure* f) { 2152 JvmtiCurrentBreakpoints::oops_do(f); 2153 JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f); 2154} 2155 2156void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) { 2157 JvmtiTagMap::weak_oops_do(is_alive, f); 2158} 2159 2160void JvmtiExport::gc_epilogue() { 2161 JvmtiCurrentBreakpoints::gc_epilogue(); 2162} 2163 2164// Onload raw monitor transition. 2165void JvmtiExport::transition_pending_onload_raw_monitors() { 2166 JvmtiPendingMonitors::transition_raw_monitors(); 2167} 2168 2169//////////////////////////////////////////////////////////////////////////////////////////////// 2170 2171// type for the Agent_OnAttach entry point 2172extern "C" { 2173 typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *); 2174} 2175 2176#ifndef SERVICES_KERNEL 2177jint JvmtiExport::load_agent_library(AttachOperation* op, outputStream* st) { 2178 char ebuf[1024]; 2179 char buffer[JVM_MAXPATHLEN]; 2180 void* library; 2181 jint result = JNI_ERR; 2182 2183 // get agent name and options 2184 const char* agent = op->arg(0); 2185 const char* absParam = op->arg(1); 2186 const char* options = op->arg(2); 2187 2188 // The abs paramter should be "true" or "false" 2189 bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0); 2190 2191 2192 // If the path is absolute we attempt to load the library. Otherwise we try to 2193 // load it from the standard dll directory. 2194 2195 if (is_absolute_path) { 2196 library = os::dll_load(agent, ebuf, sizeof ebuf); 2197 } else { 2198 // Try to load the agent from the standard dll directory 2199 os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), agent); 2200 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2201 if (library == NULL) { 2202 // not found - try local path 2203 char ns[1] = {0}; 2204 os::dll_build_name(buffer, sizeof(buffer), ns, agent); 2205 library = os::dll_load(buffer, ebuf, sizeof ebuf); 2206 } 2207 } 2208 2209 // If the library was loaded then we attempt to invoke the Agent_OnAttach 2210 // function 2211 if (library != NULL) { 2212 2213 // Lookup the Agent_OnAttach function 2214 OnAttachEntry_t on_attach_entry = NULL; 2215 const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS; 2216 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_attach_symbols); symbol_index++) { 2217 on_attach_entry = 2218 CAST_TO_FN_PTR(OnAttachEntry_t, os::dll_lookup(library, on_attach_symbols[symbol_index])); 2219 if (on_attach_entry != NULL) break; 2220 } 2221 2222 if (on_attach_entry == NULL) { 2223 // Agent_OnAttach missing - unload library 2224 os::dll_unload(library); 2225 } else { 2226 // Invoke the Agent_OnAttach function 2227 JavaThread* THREAD = JavaThread::current(); 2228 { 2229 extern struct JavaVM_ main_vm; 2230 JvmtiThreadEventMark jem(THREAD); 2231 JvmtiJavaThreadEventTransition jet(THREAD); 2232 2233 result = (*on_attach_entry)(&main_vm, (char*)options, NULL); 2234 } 2235 2236 // Agent_OnAttach may have used JNI 2237 if (HAS_PENDING_EXCEPTION) { 2238 CLEAR_PENDING_EXCEPTION; 2239 } 2240 2241 // If OnAttach returns JNI_OK then we add it to the list of 2242 // agent libraries so that we can call Agent_OnUnload later. 2243 if (result == JNI_OK) { 2244 Arguments::add_loaded_agent(agent, (char*)options, is_absolute_path, library); 2245 } 2246 2247 // Agent_OnAttach executed so completion status is JNI_OK 2248 st->print_cr("%d", result); 2249 result = JNI_OK; 2250 } 2251 } 2252 return result; 2253} 2254#endif // SERVICES_KERNEL 2255 2256//////////////////////////////////////////////////////////////////////////////////////////////// 2257 2258// Setup current current thread for event collection. 2259void JvmtiEventCollector::setup_jvmti_thread_state() { 2260 // set this event collector to be the current one. 2261 JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current()); 2262 // state can only be NULL if the current thread is exiting which 2263 // should not happen since we're trying to configure for event collection 2264 guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state"); 2265 if (is_vm_object_alloc_event()) { 2266 _prev = state->get_vm_object_alloc_event_collector(); 2267 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this); 2268 } else if (is_dynamic_code_event()) { 2269 _prev = state->get_dynamic_code_event_collector(); 2270 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this); 2271 } 2272} 2273 2274// Unset current event collection in this thread and reset it with previous 2275// collector. 2276void JvmtiEventCollector::unset_jvmti_thread_state() { 2277 JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state(); 2278 if (state != NULL) { 2279 // restore the previous event collector (if any) 2280 if (is_vm_object_alloc_event()) { 2281 if (state->get_vm_object_alloc_event_collector() == this) { 2282 state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev); 2283 } else { 2284 // this thread's jvmti state was created during the scope of 2285 // the event collector. 2286 } 2287 } else { 2288 if (is_dynamic_code_event()) { 2289 if (state->get_dynamic_code_event_collector() == this) { 2290 state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev); 2291 } else { 2292 // this thread's jvmti state was created during the scope of 2293 // the event collector. 2294 } 2295 } 2296 } 2297 } 2298} 2299 2300// create the dynamic code event collector 2301JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) { 2302 if (JvmtiExport::should_post_dynamic_code_generated()) { 2303 setup_jvmti_thread_state(); 2304 } 2305} 2306 2307// iterate over any code blob descriptors collected and post a 2308// DYNAMIC_CODE_GENERATED event to the profiler. 2309JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() { 2310 assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events"); 2311 // iterate over any code blob descriptors that we collected 2312 if (_code_blobs != NULL) { 2313 for (int i=0; i<_code_blobs->length(); i++) { 2314 JvmtiCodeBlobDesc* blob = _code_blobs->at(i); 2315 JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end()); 2316 FreeHeap(blob); 2317 } 2318 delete _code_blobs; 2319 } 2320 unset_jvmti_thread_state(); 2321} 2322 2323// register a stub 2324void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) { 2325 if (_code_blobs == NULL) { 2326 _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true); 2327 } 2328 _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end)); 2329} 2330 2331// Setup current thread to record vm allocated objects. 2332JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) { 2333 if (JvmtiExport::should_post_vm_object_alloc()) { 2334 _enable = true; 2335 setup_jvmti_thread_state(); 2336 } else { 2337 _enable = false; 2338 } 2339} 2340 2341// Post vm_object_alloc event for vm allocated objects visible to java 2342// world. 2343JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() { 2344 if (_allocated != NULL) { 2345 set_enabled(false); 2346 for (int i = 0; i < _allocated->length(); i++) { 2347 oop obj = _allocated->at(i); 2348 if (ServiceUtil::visible_oop(obj)) { 2349 JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj); 2350 } 2351 } 2352 delete _allocated; 2353 } 2354 unset_jvmti_thread_state(); 2355} 2356 2357void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) { 2358 assert(is_enabled(), "VM object alloc event collector is not enabled"); 2359 if (_allocated == NULL) { 2360 _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true); 2361 } 2362 _allocated->push(obj); 2363} 2364 2365// GC support. 2366void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) { 2367 if (_allocated != NULL) { 2368 for(int i=_allocated->length() - 1; i >= 0; i--) { 2369 if (_allocated->at(i) != NULL) { 2370 f->do_oop(_allocated->adr_at(i)); 2371 } 2372 } 2373 } 2374} 2375 2376void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) { 2377 // no-op if jvmti not enabled 2378 if (!JvmtiEnv::environments_might_exist()) { 2379 return; 2380 } 2381 2382 // Runs at safepoint. So no need to acquire Threads_lock. 2383 for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) { 2384 JvmtiThreadState *state = jthr->jvmti_thread_state(); 2385 if (state != NULL) { 2386 JvmtiVMObjectAllocEventCollector *collector; 2387 collector = state->get_vm_object_alloc_event_collector(); 2388 while (collector != NULL) { 2389 collector->oops_do(f); 2390 collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev(); 2391 } 2392 } 2393 } 2394} 2395 2396 2397// Disable collection of VMObjectAlloc events 2398NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) { 2399 // a no-op if VMObjectAlloc event is not enabled 2400 if (!JvmtiExport::should_post_vm_object_alloc()) { 2401 return; 2402 } 2403 Thread* thread = ThreadLocalStorage::thread(); 2404 if (thread != NULL && thread->is_Java_thread()) { 2405 JavaThread* current_thread = (JavaThread*)thread; 2406 JvmtiThreadState *state = current_thread->jvmti_thread_state(); 2407 if (state != NULL) { 2408 JvmtiVMObjectAllocEventCollector *collector; 2409 collector = state->get_vm_object_alloc_event_collector(); 2410 if (collector != NULL && collector->is_enabled()) { 2411 _collector = collector; 2412 _collector->set_enabled(false); 2413 } 2414 } 2415 } 2416} 2417 2418// Re-Enable collection of VMObjectAlloc events (if previously enabled) 2419NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() { 2420 if (was_enabled()) { 2421 _collector->set_enabled(true); 2422 } 2423}; 2424 2425JvmtiGCMarker::JvmtiGCMarker() { 2426 // if there aren't any JVMTI environments then nothing to do 2427 if (!JvmtiEnv::environments_might_exist()) { 2428 return; 2429 } 2430 2431 if (JvmtiExport::should_post_garbage_collection_start()) { 2432 JvmtiExport::post_garbage_collection_start(); 2433 } 2434 2435 if (SafepointSynchronize::is_at_safepoint()) { 2436 // Do clean up tasks that need to be done at a safepoint 2437 JvmtiEnvBase::check_for_periodic_clean_up(); 2438 } 2439} 2440 2441JvmtiGCMarker::~JvmtiGCMarker() { 2442 // if there aren't any JVMTI environments then nothing to do 2443 if (!JvmtiEnv::environments_might_exist()) { 2444 return; 2445 } 2446 2447 // JVMTI notify gc finish 2448 if (JvmtiExport::should_post_garbage_collection_finish()) { 2449 JvmtiExport::post_garbage_collection_finish(); 2450 } 2451} 2452#endif // JVMTI_KERNEL 2453