--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/prims/jvmtiExport.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,2757 @@
+/*
+ * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "code/nmethod.hpp"
+#include "code/pcDesc.hpp"
+#include "code/scopeDesc.hpp"
+#include "interpreter/interpreter.hpp"
+#include "jvmtifiles/jvmtiEnv.hpp"
+#include "logging/log.hpp"
+#include "logging/logStream.hpp"
+#include "memory/resourceArea.hpp"
+#include "oops/objArrayKlass.hpp"
+#include "oops/objArrayOop.hpp"
+#include "oops/oop.inline.hpp"
+#include "prims/jvmtiCodeBlobEvents.hpp"
+#include "prims/jvmtiEventController.hpp"
+#include "prims/jvmtiEventController.inline.hpp"
+#include "prims/jvmtiExport.hpp"
+#include "prims/jvmtiImpl.hpp"
+#include "prims/jvmtiManageCapabilities.hpp"
+#include "prims/jvmtiRawMonitor.hpp"
+#include "prims/jvmtiRedefineClasses.hpp"
+#include "prims/jvmtiTagMap.hpp"
+#include "prims/jvmtiThreadState.inline.hpp"
+#include "runtime/arguments.hpp"
+#include "runtime/handles.hpp"
+#include "runtime/interfaceSupport.hpp"
+#include "runtime/javaCalls.hpp"
+#include "runtime/objectMonitor.hpp"
+#include "runtime/objectMonitor.inline.hpp"
+#include "runtime/os.inline.hpp"
+#include "runtime/thread.inline.hpp"
+#include "runtime/vframe.hpp"
+#include "services/serviceUtil.hpp"
+#include "utilities/macros.hpp"
+#if INCLUDE_ALL_GCS
+#include "gc/parallel/psMarkSweep.hpp"
+#endif // INCLUDE_ALL_GCS
+
+#ifdef JVMTI_TRACE
+#define EVT_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_SENT) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
+#define EVT_TRIG_TRACE(evt,out) if ((JvmtiTrace::event_trace_flags(evt) & JvmtiTrace::SHOW_EVENT_TRIGGER) != 0) { SafeResourceMark rm; log_trace(jvmti) out; }
+#else
+#define EVT_TRIG_TRACE(evt,out)
+#define EVT_TRACE(evt,out)
+#endif
+
+///////////////////////////////////////////////////////////////
+//
+// JvmtiEventTransition
+//
+// TO DO --
+// more handle purging
+
+// Use this for JavaThreads and state is _thread_in_vm.
+class JvmtiJavaThreadEventTransition : StackObj {
+private:
+ ResourceMark _rm;
+ ThreadToNativeFromVM _transition;
+ HandleMark _hm;
+
+public:
+ JvmtiJavaThreadEventTransition(JavaThread *thread) :
+ _rm(),
+ _transition(thread),
+ _hm(thread) {};
+};
+
+// For JavaThreads which are not in _thread_in_vm state
+// and other system threads use this.
+class JvmtiThreadEventTransition : StackObj {
+private:
+ ResourceMark _rm;
+ HandleMark _hm;
+ JavaThreadState _saved_state;
+ JavaThread *_jthread;
+
+public:
+ JvmtiThreadEventTransition(Thread *thread) : _rm(), _hm() {
+ if (thread->is_Java_thread()) {
+ _jthread = (JavaThread *)thread;
+ _saved_state = _jthread->thread_state();
+ if (_saved_state == _thread_in_Java) {
+ ThreadStateTransition::transition_from_java(_jthread, _thread_in_native);
+ } else {
+ ThreadStateTransition::transition(_jthread, _saved_state, _thread_in_native);
+ }
+ } else {
+ _jthread = NULL;
+ }
+ }
+
+ ~JvmtiThreadEventTransition() {
+ if (_jthread != NULL)
+ ThreadStateTransition::transition_from_native(_jthread, _saved_state);
+ }
+};
+
+
+///////////////////////////////////////////////////////////////
+//
+// JvmtiEventMark
+//
+
+class JvmtiEventMark : public StackObj {
+private:
+ JavaThread *_thread;
+ JNIEnv* _jni_env;
+ JvmtiThreadState::ExceptionState _saved_exception_state;
+#if 0
+ JNIHandleBlock* _hblock;
+#endif
+
+public:
+ JvmtiEventMark(JavaThread *thread) : _thread(thread),
+ _jni_env(thread->jni_environment()),
+ _saved_exception_state(JvmtiThreadState::ES_CLEARED) {
+#if 0
+ _hblock = thread->active_handles();
+ _hblock->clear_thoroughly(); // so we can be safe
+#else
+ // we want to use the code above - but that needs the JNIHandle changes - later...
+ // for now, steal JNI push local frame code
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ // we are before an event.
+ // Save current jvmti thread exception state.
+ if (state != NULL) {
+ _saved_exception_state = state->get_exception_state();
+ }
+
+ JNIHandleBlock* old_handles = thread->active_handles();
+ JNIHandleBlock* new_handles = JNIHandleBlock::allocate_block(thread);
+ assert(new_handles != NULL, "should not be NULL");
+ new_handles->set_pop_frame_link(old_handles);
+ thread->set_active_handles(new_handles);
+#endif
+ assert(thread == JavaThread::current(), "thread must be current!");
+ thread->frame_anchor()->make_walkable(thread);
+ };
+
+ ~JvmtiEventMark() {
+#if 0
+ _hblock->clear(); // for consistency with future correct behavior
+#else
+ // we want to use the code above - but that needs the JNIHandle changes - later...
+ // for now, steal JNI pop local frame code
+ JNIHandleBlock* old_handles = _thread->active_handles();
+ JNIHandleBlock* new_handles = old_handles->pop_frame_link();
+ assert(new_handles != NULL, "should not be NULL");
+ _thread->set_active_handles(new_handles);
+ // Note that we set the pop_frame_link to NULL explicitly, otherwise
+ // the release_block call will release the blocks.
+ old_handles->set_pop_frame_link(NULL);
+ JNIHandleBlock::release_block(old_handles, _thread); // may block
+#endif
+
+ JvmtiThreadState* state = _thread->jvmti_thread_state();
+ // we are continuing after an event.
+ if (state != NULL) {
+ // Restore the jvmti thread exception state.
+ state->restore_exception_state(_saved_exception_state);
+ }
+ }
+
+#if 0
+ jobject to_jobject(oop obj) { return obj == NULL? NULL : _hblock->allocate_handle_fast(obj); }
+#else
+ // we want to use the code above - but that needs the JNIHandle changes - later...
+ // for now, use regular make_local
+ jobject to_jobject(oop obj) { return JNIHandles::make_local(_thread,obj); }
+#endif
+
+ jclass to_jclass(Klass* klass) { return (klass == NULL ? NULL : (jclass)to_jobject(klass->java_mirror())); }
+
+ jmethodID to_jmethodID(const methodHandle& method) { return method->jmethod_id(); }
+
+ JNIEnv* jni_env() { return _jni_env; }
+};
+
+class JvmtiThreadEventMark : public JvmtiEventMark {
+private:
+ jthread _jt;
+
+public:
+ JvmtiThreadEventMark(JavaThread *thread) :
+ JvmtiEventMark(thread) {
+ _jt = (jthread)(to_jobject(thread->threadObj()));
+ };
+ jthread jni_thread() { return _jt; }
+};
+
+class JvmtiClassEventMark : public JvmtiThreadEventMark {
+private:
+ jclass _jc;
+
+public:
+ JvmtiClassEventMark(JavaThread *thread, Klass* klass) :
+ JvmtiThreadEventMark(thread) {
+ _jc = to_jclass(klass);
+ };
+ jclass jni_class() { return _jc; }
+};
+
+class JvmtiMethodEventMark : public JvmtiThreadEventMark {
+private:
+ jmethodID _mid;
+
+public:
+ JvmtiMethodEventMark(JavaThread *thread, const methodHandle& method) :
+ JvmtiThreadEventMark(thread),
+ _mid(to_jmethodID(method)) {};
+ jmethodID jni_methodID() { return _mid; }
+};
+
+class JvmtiLocationEventMark : public JvmtiMethodEventMark {
+private:
+ jlocation _loc;
+
+public:
+ JvmtiLocationEventMark(JavaThread *thread, const methodHandle& method, address location) :
+ JvmtiMethodEventMark(thread, method),
+ _loc(location - method->code_base()) {};
+ jlocation location() { return _loc; }
+};
+
+class JvmtiExceptionEventMark : public JvmtiLocationEventMark {
+private:
+ jobject _exc;
+
+public:
+ JvmtiExceptionEventMark(JavaThread *thread, const methodHandle& method, address location, Handle exception) :
+ JvmtiLocationEventMark(thread, method, location),
+ _exc(to_jobject(exception())) {};
+ jobject exception() { return _exc; }
+};
+
+class JvmtiClassFileLoadEventMark : public JvmtiThreadEventMark {
+private:
+ const char *_class_name;
+ jobject _jloader;
+ jobject _protection_domain;
+ jclass _class_being_redefined;
+
+public:
+ JvmtiClassFileLoadEventMark(JavaThread *thread, Symbol* name,
+ Handle class_loader, Handle prot_domain, Klass* class_being_redefined) : JvmtiThreadEventMark(thread) {
+ _class_name = name != NULL? name->as_utf8() : NULL;
+ _jloader = (jobject)to_jobject(class_loader());
+ _protection_domain = (jobject)to_jobject(prot_domain());
+ if (class_being_redefined == NULL) {
+ _class_being_redefined = NULL;
+ } else {
+ _class_being_redefined = (jclass)to_jclass(class_being_redefined);
+ }
+ };
+ const char *class_name() {
+ return _class_name;
+ }
+ jobject jloader() {
+ return _jloader;
+ }
+ jobject protection_domain() {
+ return _protection_domain;
+ }
+ jclass class_being_redefined() {
+ return _class_being_redefined;
+ }
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+int JvmtiExport::_field_access_count = 0;
+int JvmtiExport::_field_modification_count = 0;
+
+bool JvmtiExport::_can_access_local_variables = false;
+bool JvmtiExport::_can_hotswap_or_post_breakpoint = false;
+bool JvmtiExport::_can_modify_any_class = false;
+bool JvmtiExport::_can_walk_any_space = false;
+
+bool JvmtiExport::_has_redefined_a_class = false;
+bool JvmtiExport::_all_dependencies_are_recorded = false;
+
+//
+// field access management
+//
+
+// interpreter generator needs the address of the counter
+address JvmtiExport::get_field_access_count_addr() {
+ // We don't grab a lock because we don't want to
+ // serialize field access between all threads. This means that a
+ // thread on another processor can see the wrong count value and
+ // may either miss making a needed call into post_field_access()
+ // or will make an unneeded call into post_field_access(). We pay
+ // this price to avoid slowing down the VM when we aren't watching
+ // field accesses.
+ // Other access/mutation safe by virtue of being in VM state.
+ return (address)(&_field_access_count);
+}
+
+//
+// field modification management
+//
+
+// interpreter generator needs the address of the counter
+address JvmtiExport::get_field_modification_count_addr() {
+ // We don't grab a lock because we don't
+ // want to serialize field modification between all threads. This
+ // means that a thread on another processor can see the wrong
+ // count value and may either miss making a needed call into
+ // post_field_modification() or will make an unneeded call into
+ // post_field_modification(). We pay this price to avoid slowing
+ // down the VM when we aren't watching field modifications.
+ // Other access/mutation safe by virtue of being in VM state.
+ return (address)(&_field_modification_count);
+}
+
+
+///////////////////////////////////////////////////////////////
+// Functions needed by java.lang.instrument for starting up javaagent.
+///////////////////////////////////////////////////////////////
+
+jint
+JvmtiExport::get_jvmti_interface(JavaVM *jvm, void **penv, jint version) {
+ // The JVMTI_VERSION_INTERFACE_JVMTI part of the version number
+ // has already been validated in JNI GetEnv().
+ int major, minor, micro;
+
+ // micro version doesn't matter here (yet?)
+ decode_version_values(version, &major, &minor, µ);
+ switch (major) {
+ case 1:
+ switch (minor) {
+ case 0: // version 1.0.<micro> is recognized
+ case 1: // version 1.1.<micro> is recognized
+ case 2: // version 1.2.<micro> is recognized
+ break;
+
+ default:
+ return JNI_EVERSION; // unsupported minor version number
+ }
+ break;
+ case 9:
+ switch (minor) {
+ case 0: // version 9.0.<micro> is recognized
+ break;
+ default:
+ return JNI_EVERSION; // unsupported minor version number
+ }
+ break;
+ default:
+ return JNI_EVERSION; // unsupported major version number
+ }
+
+ if (JvmtiEnv::get_phase() == JVMTI_PHASE_LIVE) {
+ JavaThread* current_thread = JavaThread::current();
+ // transition code: native to VM
+ ThreadInVMfromNative __tiv(current_thread);
+ VM_ENTRY_BASE(jvmtiEnv*, JvmtiExport::get_jvmti_interface, current_thread)
+ debug_only(VMNativeEntryWrapper __vew;)
+
+ JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
+ *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
+ return JNI_OK;
+
+ } else if (JvmtiEnv::get_phase() == JVMTI_PHASE_ONLOAD) {
+ // not live, no thread to transition
+ JvmtiEnv *jvmti_env = JvmtiEnv::create_a_jvmti(version);
+ *penv = jvmti_env->jvmti_external(); // actual type is jvmtiEnv* -- not to be confused with JvmtiEnv*
+ return JNI_OK;
+
+ } else {
+ // Called at the wrong time
+ *penv = NULL;
+ return JNI_EDETACHED;
+ }
+}
+
+void
+JvmtiExport::add_default_read_edges(Handle h_module, TRAPS) {
+ if (!Universe::is_module_initialized()) {
+ return; // extra safety
+ }
+ assert(!h_module.is_null(), "module should always be set");
+
+ // Invoke the transformedByAgent method
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ SystemDictionary::module_Modules_klass(),
+ vmSymbols::transformedByAgent_name(),
+ vmSymbols::transformedByAgent_signature(),
+ h_module,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ LogTarget(Trace, jvmti) log;
+ LogStream log_stream(log);
+ java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
+ log_stream.cr();
+ CLEAR_PENDING_EXCEPTION;
+ return;
+ }
+}
+
+jvmtiError
+JvmtiExport::add_module_reads(Handle module, Handle to_module, TRAPS) {
+ if (!Universe::is_module_initialized()) {
+ return JVMTI_ERROR_NONE; // extra safety
+ }
+ assert(!module.is_null(), "module should always be set");
+ assert(!to_module.is_null(), "to_module should always be set");
+
+ // Invoke the addReads method
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ SystemDictionary::module_Modules_klass(),
+ vmSymbols::addReads_name(),
+ vmSymbols::addReads_signature(),
+ module,
+ to_module,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ LogTarget(Trace, jvmti) log;
+ LogStream log_stream(log);
+ java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
+ log_stream.cr();
+ CLEAR_PENDING_EXCEPTION;
+ return JVMTI_ERROR_INTERNAL;
+ }
+ return JVMTI_ERROR_NONE;
+}
+
+jvmtiError
+JvmtiExport::add_module_exports(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
+ if (!Universe::is_module_initialized()) {
+ return JVMTI_ERROR_NONE; // extra safety
+ }
+ assert(!module.is_null(), "module should always be set");
+ assert(!to_module.is_null(), "to_module should always be set");
+ assert(!pkg_name.is_null(), "pkg_name should always be set");
+
+ // Invoke the addExports method
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ SystemDictionary::module_Modules_klass(),
+ vmSymbols::addExports_name(),
+ vmSymbols::addExports_signature(),
+ module,
+ pkg_name,
+ to_module,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
+ LogTarget(Trace, jvmti) log;
+ LogStream log_stream(log);
+ java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
+ log_stream.cr();
+ CLEAR_PENDING_EXCEPTION;
+ if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
+ return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+ }
+ return JVMTI_ERROR_INTERNAL;
+ }
+ return JVMTI_ERROR_NONE;
+}
+
+jvmtiError
+JvmtiExport::add_module_opens(Handle module, Handle pkg_name, Handle to_module, TRAPS) {
+ if (!Universe::is_module_initialized()) {
+ return JVMTI_ERROR_NONE; // extra safety
+ }
+ assert(!module.is_null(), "module should always be set");
+ assert(!to_module.is_null(), "to_module should always be set");
+ assert(!pkg_name.is_null(), "pkg_name should always be set");
+
+ // Invoke the addOpens method
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ SystemDictionary::module_Modules_klass(),
+ vmSymbols::addOpens_name(),
+ vmSymbols::addExports_signature(),
+ module,
+ pkg_name,
+ to_module,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
+ LogTarget(Trace, jvmti) log;
+ LogStream log_stream(log);
+ java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
+ log_stream.cr();
+ CLEAR_PENDING_EXCEPTION;
+ if (ex_name == vmSymbols::java_lang_IllegalArgumentException()) {
+ return JVMTI_ERROR_ILLEGAL_ARGUMENT;
+ }
+ return JVMTI_ERROR_INTERNAL;
+ }
+ return JVMTI_ERROR_NONE;
+}
+
+jvmtiError
+JvmtiExport::add_module_uses(Handle module, Handle service, TRAPS) {
+ if (!Universe::is_module_initialized()) {
+ return JVMTI_ERROR_NONE; // extra safety
+ }
+ assert(!module.is_null(), "module should always be set");
+ assert(!service.is_null(), "service should always be set");
+
+ // Invoke the addUses method
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ SystemDictionary::module_Modules_klass(),
+ vmSymbols::addUses_name(),
+ vmSymbols::addUses_signature(),
+ module,
+ service,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ LogTarget(Trace, jvmti) log;
+ LogStream log_stream(log);
+ java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
+ log_stream.cr();
+ CLEAR_PENDING_EXCEPTION;
+ return JVMTI_ERROR_INTERNAL;
+ }
+ return JVMTI_ERROR_NONE;
+}
+
+jvmtiError
+JvmtiExport::add_module_provides(Handle module, Handle service, Handle impl_class, TRAPS) {
+ if (!Universe::is_module_initialized()) {
+ return JVMTI_ERROR_NONE; // extra safety
+ }
+ assert(!module.is_null(), "module should always be set");
+ assert(!service.is_null(), "service should always be set");
+ assert(!impl_class.is_null(), "impl_class should always be set");
+
+ // Invoke the addProvides method
+ JavaValue result(T_VOID);
+ JavaCalls::call_static(&result,
+ SystemDictionary::module_Modules_klass(),
+ vmSymbols::addProvides_name(),
+ vmSymbols::addProvides_signature(),
+ module,
+ service,
+ impl_class,
+ THREAD);
+
+ if (HAS_PENDING_EXCEPTION) {
+ LogTarget(Trace, jvmti) log;
+ LogStream log_stream(log);
+ java_lang_Throwable::print(PENDING_EXCEPTION, &log_stream);
+ log_stream.cr();
+ CLEAR_PENDING_EXCEPTION;
+ return JVMTI_ERROR_INTERNAL;
+ }
+ return JVMTI_ERROR_NONE;
+}
+
+void
+JvmtiExport::decode_version_values(jint version, int * major, int * minor,
+ int * micro) {
+ *major = (version & JVMTI_VERSION_MASK_MAJOR) >> JVMTI_VERSION_SHIFT_MAJOR;
+ *minor = (version & JVMTI_VERSION_MASK_MINOR) >> JVMTI_VERSION_SHIFT_MINOR;
+ *micro = (version & JVMTI_VERSION_MASK_MICRO) >> JVMTI_VERSION_SHIFT_MICRO;
+}
+
+void JvmtiExport::enter_primordial_phase() {
+ JvmtiEnvBase::set_phase(JVMTI_PHASE_PRIMORDIAL);
+}
+
+void JvmtiExport::enter_early_start_phase() {
+ JvmtiManageCapabilities::recompute_always_capabilities();
+ set_early_vmstart_recorded(true);
+}
+
+void JvmtiExport::enter_start_phase() {
+ JvmtiManageCapabilities::recompute_always_capabilities();
+ JvmtiEnvBase::set_phase(JVMTI_PHASE_START);
+}
+
+void JvmtiExport::enter_onload_phase() {
+ JvmtiEnvBase::set_phase(JVMTI_PHASE_ONLOAD);
+}
+
+void JvmtiExport::enter_live_phase() {
+ JvmtiEnvBase::set_phase(JVMTI_PHASE_LIVE);
+}
+
+//
+// JVMTI events that the VM posts to the debugger and also startup agent
+// and call the agent's premain() for java.lang.instrument.
+//
+
+void JvmtiExport::post_early_vm_start() {
+ EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg Early VM start event triggered" ));
+
+ // can now enable some events
+ JvmtiEventController::vm_start();
+
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ // Only early vmstart envs post early VMStart event
+ if (env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
+ EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt Early VM start event sent" ));
+ JavaThread *thread = JavaThread::current();
+ JvmtiThreadEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventVMStart callback = env->callbacks()->VMStart;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env());
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_vm_start() {
+ EVT_TRIG_TRACE(JVMTI_EVENT_VM_START, ("Trg VM start event triggered" ));
+
+ // can now enable some events
+ JvmtiEventController::vm_start();
+
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ // Early vmstart envs do not post normal VMStart event
+ if (!env->early_vmstart_env() && env->is_enabled(JVMTI_EVENT_VM_START)) {
+ EVT_TRACE(JVMTI_EVENT_VM_START, ("Evt VM start event sent" ));
+
+ JavaThread *thread = JavaThread::current();
+ JvmtiThreadEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventVMStart callback = env->callbacks()->VMStart;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env());
+ }
+ }
+ }
+}
+
+
+void JvmtiExport::post_vm_initialized() {
+ EVT_TRIG_TRACE(JVMTI_EVENT_VM_INIT, ("Trg VM init event triggered" ));
+
+ // can now enable events
+ JvmtiEventController::vm_init();
+
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_VM_INIT)) {
+ EVT_TRACE(JVMTI_EVENT_VM_INIT, ("Evt VM init event sent" ));
+
+ JavaThread *thread = JavaThread::current();
+ JvmtiThreadEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventVMInit callback = env->callbacks()->VMInit;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
+ }
+ }
+ }
+}
+
+
+void JvmtiExport::post_vm_death() {
+ EVT_TRIG_TRACE(JVMTI_EVENT_VM_DEATH, ("Trg VM death event triggered" ));
+
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_VM_DEATH)) {
+ EVT_TRACE(JVMTI_EVENT_VM_DEATH, ("Evt VM death event sent" ));
+
+ JavaThread *thread = JavaThread::current();
+ JvmtiEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventVMDeath callback = env->callbacks()->VMDeath;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env());
+ }
+ }
+ }
+
+ JvmtiEnvBase::set_phase(JVMTI_PHASE_DEAD);
+ JvmtiEventController::vm_death();
+}
+
+char**
+JvmtiExport::get_all_native_method_prefixes(int* count_ptr) {
+ // Have to grab JVMTI thread state lock to be sure environment doesn't
+ // go away while we iterate them. No locks during VM bring-up.
+ if (Threads::number_of_threads() == 0 || SafepointSynchronize::is_at_safepoint()) {
+ return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
+ } else {
+ MutexLocker mu(JvmtiThreadState_lock);
+ return JvmtiEnvBase::get_all_native_method_prefixes(count_ptr);
+ }
+}
+
+class JvmtiClassFileLoadHookPoster : public StackObj {
+ private:
+ Symbol* _h_name;
+ Handle _class_loader;
+ Handle _h_protection_domain;
+ unsigned char ** _data_ptr;
+ unsigned char ** _end_ptr;
+ JavaThread * _thread;
+ jint _curr_len;
+ unsigned char * _curr_data;
+ JvmtiEnv * _curr_env;
+ JvmtiCachedClassFileData ** _cached_class_file_ptr;
+ JvmtiThreadState * _state;
+ Klass* _class_being_redefined;
+ JvmtiClassLoadKind _load_kind;
+ bool _has_been_modified;
+
+ public:
+ inline JvmtiClassFileLoadHookPoster(Symbol* h_name, Handle class_loader,
+ Handle h_protection_domain,
+ unsigned char **data_ptr, unsigned char **end_ptr,
+ JvmtiCachedClassFileData **cache_ptr) {
+ _h_name = h_name;
+ _class_loader = class_loader;
+ _h_protection_domain = h_protection_domain;
+ _data_ptr = data_ptr;
+ _end_ptr = end_ptr;
+ _thread = JavaThread::current();
+ _curr_len = *end_ptr - *data_ptr;
+ _curr_data = *data_ptr;
+ _curr_env = NULL;
+ _cached_class_file_ptr = cache_ptr;
+ _has_been_modified = false;
+
+ _state = _thread->jvmti_thread_state();
+ if (_state != NULL) {
+ _class_being_redefined = _state->get_class_being_redefined();
+ _load_kind = _state->get_class_load_kind();
+ Klass* klass = (_class_being_redefined == NULL) ? NULL : _class_being_redefined;
+ if (_load_kind != jvmti_class_load_kind_load && klass != NULL) {
+ ModuleEntry* module_entry = InstanceKlass::cast(klass)->module();
+ assert(module_entry != NULL, "module_entry should always be set");
+ if (module_entry->is_named() &&
+ module_entry->module() != NULL &&
+ !module_entry->has_default_read_edges()) {
+ if (!module_entry->set_has_default_read_edges()) {
+ // We won a potential race.
+ // Add read edges to the unnamed modules of the bootstrap and app class loaders
+ Handle class_module(_thread, module_entry->module()); // Obtain j.l.r.Module
+ JvmtiExport::add_default_read_edges(class_module, _thread);
+ }
+ }
+ }
+ // Clear class_being_redefined flag here. The action
+ // from agent handler could generate a new class file load
+ // hook event and if it is not cleared the new event generated
+ // from regular class file load could have this stale redefined
+ // class handle info.
+ _state->clear_class_being_redefined();
+ } else {
+ // redefine and retransform will always set the thread state
+ _class_being_redefined = NULL;
+ _load_kind = jvmti_class_load_kind_load;
+ }
+ }
+
+ void post() {
+ post_all_envs();
+ copy_modified_data();
+ }
+
+ bool has_been_modified() { return _has_been_modified; }
+
+ private:
+ void post_all_envs() {
+ if (_load_kind != jvmti_class_load_kind_retransform) {
+ // for class load and redefine,
+ // call the non-retransformable agents
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (!env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
+ // non-retransformable agents cannot retransform back,
+ // so no need to cache the original class file bytes
+ post_to_env(env, false);
+ }
+ }
+ }
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ // retransformable agents get all events
+ if (env->is_retransformable() && env->is_enabled(JVMTI_EVENT_CLASS_FILE_LOAD_HOOK)) {
+ // retransformable agents need to cache the original class file
+ // bytes if changes are made via the ClassFileLoadHook
+ post_to_env(env, true);
+ }
+ }
+ }
+
+ void post_to_env(JvmtiEnv* env, bool caching_needed) {
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL && !env->early_class_hook_env()) {
+ return;
+ }
+ unsigned char *new_data = NULL;
+ jint new_len = 0;
+ JvmtiClassFileLoadEventMark jem(_thread, _h_name, _class_loader,
+ _h_protection_domain,
+ _class_being_redefined);
+ JvmtiJavaThreadEventTransition jet(_thread);
+ jvmtiEventClassFileLoadHook callback = env->callbacks()->ClassFileLoadHook;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(),
+ jem.class_being_redefined(),
+ jem.jloader(), jem.class_name(),
+ jem.protection_domain(),
+ _curr_len, _curr_data,
+ &new_len, &new_data);
+ }
+ if (new_data != NULL) {
+ // this agent has modified class data.
+ _has_been_modified = true;
+ if (caching_needed && *_cached_class_file_ptr == NULL) {
+ // data has been changed by the new retransformable agent
+ // and it hasn't already been cached, cache it
+ JvmtiCachedClassFileData *p;
+ p = (JvmtiCachedClassFileData *)os::malloc(
+ offset_of(JvmtiCachedClassFileData, data) + _curr_len, mtInternal);
+ if (p == NULL) {
+ vm_exit_out_of_memory(offset_of(JvmtiCachedClassFileData, data) + _curr_len,
+ OOM_MALLOC_ERROR,
+ "unable to allocate cached copy of original class bytes");
+ }
+ p->length = _curr_len;
+ memcpy(p->data, _curr_data, _curr_len);
+ *_cached_class_file_ptr = p;
+ }
+
+ if (_curr_data != *_data_ptr) {
+ // curr_data is previous agent modified class data.
+ // And this has been changed by the new agent so
+ // we can delete it now.
+ _curr_env->Deallocate(_curr_data);
+ }
+
+ // Class file data has changed by the current agent.
+ _curr_data = new_data;
+ _curr_len = new_len;
+ // Save the current agent env we need this to deallocate the
+ // memory allocated by this agent.
+ _curr_env = env;
+ }
+ }
+
+ void copy_modified_data() {
+ // if one of the agent has modified class file data.
+ // Copy modified class data to new resources array.
+ if (_curr_data != *_data_ptr) {
+ *_data_ptr = NEW_RESOURCE_ARRAY(u1, _curr_len);
+ memcpy(*_data_ptr, _curr_data, _curr_len);
+ *_end_ptr = *_data_ptr + _curr_len;
+ _curr_env->Deallocate(_curr_data);
+ }
+ }
+};
+
+bool JvmtiExport::_should_post_class_file_load_hook = false;
+
+// this entry is for class file load hook on class load, redefine and retransform
+bool JvmtiExport::post_class_file_load_hook(Symbol* h_name,
+ Handle class_loader,
+ Handle h_protection_domain,
+ unsigned char **data_ptr,
+ unsigned char **end_ptr,
+ JvmtiCachedClassFileData **cache_ptr) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return false;
+ }
+
+ JvmtiClassFileLoadHookPoster poster(h_name, class_loader,
+ h_protection_domain,
+ data_ptr, end_ptr,
+ cache_ptr);
+ poster.post();
+ return poster.has_been_modified();
+}
+
+void JvmtiExport::report_unsupported(bool on) {
+ // If any JVMTI service is turned on, we need to exit before native code
+ // tries to access nonexistant services.
+ if (on) {
+ vm_exit_during_initialization("Java Kernel does not support JVMTI.");
+ }
+}
+
+
+static inline Klass* oop_to_klass(oop obj) {
+ Klass* k = obj->klass();
+
+ // if the object is a java.lang.Class then return the java mirror
+ if (k == SystemDictionary::Class_klass()) {
+ if (!java_lang_Class::is_primitive(obj)) {
+ k = java_lang_Class::as_Klass(obj);
+ assert(k != NULL, "class for non-primitive mirror must exist");
+ }
+ }
+ return k;
+}
+
+class JvmtiVMObjectAllocEventMark : public JvmtiClassEventMark {
+ private:
+ jobject _jobj;
+ jlong _size;
+ public:
+ JvmtiVMObjectAllocEventMark(JavaThread *thread, oop obj) : JvmtiClassEventMark(thread, oop_to_klass(obj)) {
+ _jobj = (jobject)to_jobject(obj);
+ _size = obj->size() * wordSize;
+ };
+ jobject jni_jobject() { return _jobj; }
+ jlong size() { return _size; }
+};
+
+class JvmtiCompiledMethodLoadEventMark : public JvmtiMethodEventMark {
+ private:
+ jint _code_size;
+ const void *_code_data;
+ jint _map_length;
+ jvmtiAddrLocationMap *_map;
+ const void *_compile_info;
+ public:
+ JvmtiCompiledMethodLoadEventMark(JavaThread *thread, nmethod *nm, void* compile_info_ptr = NULL)
+ : JvmtiMethodEventMark(thread,methodHandle(thread, nm->method())) {
+ _code_data = nm->insts_begin();
+ _code_size = nm->insts_size();
+ _compile_info = compile_info_ptr; // Set void pointer of compiledMethodLoad Event. Default value is NULL.
+ JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &_map, &_map_length);
+ }
+ ~JvmtiCompiledMethodLoadEventMark() {
+ FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, _map);
+ }
+
+ jint code_size() { return _code_size; }
+ const void *code_data() { return _code_data; }
+ jint map_length() { return _map_length; }
+ const jvmtiAddrLocationMap* map() { return _map; }
+ const void *compile_info() { return _compile_info; }
+};
+
+
+
+class JvmtiMonitorEventMark : public JvmtiThreadEventMark {
+private:
+ jobject _jobj;
+public:
+ JvmtiMonitorEventMark(JavaThread *thread, oop object)
+ : JvmtiThreadEventMark(thread){
+ _jobj = to_jobject(object);
+ }
+ jobject jni_object() { return _jobj; }
+};
+
+///////////////////////////////////////////////////////////////
+//
+// pending CompiledMethodUnload support
+//
+
+void JvmtiExport::post_compiled_method_unload(
+ jmethodID method, const void *code_begin) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ JavaThread* thread = JavaThread::current();
+ EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
+ ("[%s] method compile unload event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ // post the event for each environment that has this event enabled.
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
+ continue;
+ }
+ EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_UNLOAD,
+ ("[%s] class compile method unload event sent jmethodID " PTR_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
+
+ ResourceMark rm(thread);
+
+ JvmtiEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventCompiledMethodUnload callback = env->callbacks()->CompiledMethodUnload;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), method, code_begin);
+ }
+ }
+ }
+}
+
+///////////////////////////////////////////////////////////////
+//
+// JvmtiExport
+//
+
+void JvmtiExport::post_raw_breakpoint(JavaThread *thread, Method* method, address location) {
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ EVT_TRIG_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Trg Breakpoint triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_BREAKPOINT);
+ if (!ets->breakpoint_posted() && ets->is_enabled(JVMTI_EVENT_BREAKPOINT)) {
+ ThreadState old_os_state = thread->osthread()->get_state();
+ thread->osthread()->set_state(BREAKPOINTED);
+ EVT_TRACE(JVMTI_EVENT_BREAKPOINT, ("[%s] Evt Breakpoint sent %s.%s @ " INTX_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
+ location - mh()->code_base() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiLocationEventMark jem(thread, mh, location);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventBreakpoint callback = env->callbacks()->Breakpoint;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), jem.location());
+ }
+
+ ets->set_breakpoint_posted();
+ thread->osthread()->set_state(old_os_state);
+ }
+ }
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+bool JvmtiExport::_can_get_source_debug_extension = false;
+bool JvmtiExport::_can_maintain_original_method_order = false;
+bool JvmtiExport::_can_post_interpreter_events = false;
+bool JvmtiExport::_can_post_on_exceptions = false;
+bool JvmtiExport::_can_post_breakpoint = false;
+bool JvmtiExport::_can_post_field_access = false;
+bool JvmtiExport::_can_post_field_modification = false;
+bool JvmtiExport::_can_post_method_entry = false;
+bool JvmtiExport::_can_post_method_exit = false;
+bool JvmtiExport::_can_pop_frame = false;
+bool JvmtiExport::_can_force_early_return = false;
+
+bool JvmtiExport::_early_vmstart_recorded = false;
+
+bool JvmtiExport::_should_post_single_step = false;
+bool JvmtiExport::_should_post_field_access = false;
+bool JvmtiExport::_should_post_field_modification = false;
+bool JvmtiExport::_should_post_class_load = false;
+bool JvmtiExport::_should_post_class_prepare = false;
+bool JvmtiExport::_should_post_class_unload = false;
+bool JvmtiExport::_should_post_thread_life = false;
+bool JvmtiExport::_should_clean_up_heap_objects = false;
+bool JvmtiExport::_should_post_native_method_bind = false;
+bool JvmtiExport::_should_post_dynamic_code_generated = false;
+bool JvmtiExport::_should_post_data_dump = false;
+bool JvmtiExport::_should_post_compiled_method_load = false;
+bool JvmtiExport::_should_post_compiled_method_unload = false;
+bool JvmtiExport::_should_post_monitor_contended_enter = false;
+bool JvmtiExport::_should_post_monitor_contended_entered = false;
+bool JvmtiExport::_should_post_monitor_wait = false;
+bool JvmtiExport::_should_post_monitor_waited = false;
+bool JvmtiExport::_should_post_garbage_collection_start = false;
+bool JvmtiExport::_should_post_garbage_collection_finish = false;
+bool JvmtiExport::_should_post_object_free = false;
+bool JvmtiExport::_should_post_resource_exhausted = false;
+bool JvmtiExport::_should_post_vm_object_alloc = false;
+bool JvmtiExport::_should_post_on_exceptions = false;
+
+////////////////////////////////////////////////////////////////////////////////////////////////
+
+
+//
+// JVMTI single step management
+//
+void JvmtiExport::at_single_stepping_point(JavaThread *thread, Method* method, address location) {
+ assert(JvmtiExport::should_post_single_step(), "must be single stepping");
+
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ // update information about current location and post a step event
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ EVT_TRIG_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Trg Single Step triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ if (!state->hide_single_stepping()) {
+ if (state->is_pending_step_for_popframe()) {
+ state->process_pending_step_for_popframe();
+ }
+ if (state->is_pending_step_for_earlyret()) {
+ state->process_pending_step_for_earlyret();
+ }
+ JvmtiExport::post_single_step(thread, mh(), location);
+ }
+}
+
+
+void JvmtiExport::expose_single_stepping(JavaThread *thread) {
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state != NULL) {
+ state->clear_hide_single_stepping();
+ }
+}
+
+
+bool JvmtiExport::hide_single_stepping(JavaThread *thread) {
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state != NULL && state->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
+ state->set_hide_single_stepping();
+ return true;
+ } else {
+ return false;
+ }
+}
+
+void JvmtiExport::post_class_load(JavaThread *thread, Klass* klass) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ HandleMark hm(thread);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Trg Class Load triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiThreadState* state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_CLASS_LOAD)) {
+ JvmtiEnv *env = ets->get_env();
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
+ continue;
+ }
+ EVT_TRACE(JVMTI_EVENT_CLASS_LOAD, ("[%s] Evt Class Load sent %s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ klass==NULL? "NULL" : klass->external_name() ));
+ JvmtiClassEventMark jem(thread, klass);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventClassLoad callback = env->callbacks()->ClassLoad;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
+ }
+ }
+ }
+}
+
+
+void JvmtiExport::post_class_prepare(JavaThread *thread, Klass* klass) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ HandleMark hm(thread);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Trg Class Prepare triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiThreadState* state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_CLASS_PREPARE)) {
+ JvmtiEnv *env = ets->get_env();
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
+ continue;
+ }
+ EVT_TRACE(JVMTI_EVENT_CLASS_PREPARE, ("[%s] Evt Class Prepare sent %s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ klass==NULL? "NULL" : klass->external_name() ));
+ JvmtiClassEventMark jem(thread, klass);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventClassPrepare callback = env->callbacks()->ClassPrepare;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_class());
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_class_unload(Klass* klass) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ Thread *thread = Thread::current();
+ HandleMark hm(thread);
+
+ EVT_TRIG_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Trg Class Unload triggered" ));
+ if (JvmtiEventController::is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
+ assert(thread->is_VM_thread(), "wrong thread");
+
+ // get JavaThread for whom we are proxy
+ Thread *calling_thread = ((VMThread *)thread)->vm_operation()->calling_thread();
+ if (!calling_thread->is_Java_thread()) {
+ // cannot post an event to a non-JavaThread
+ return;
+ }
+ JavaThread *real_thread = (JavaThread *)calling_thread;
+
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
+ continue;
+ }
+ if (env->is_enabled((jvmtiEvent)EXT_EVENT_CLASS_UNLOAD)) {
+ EVT_TRACE(EXT_EVENT_CLASS_UNLOAD, ("[?] Evt Class Unload sent %s",
+ klass==NULL? "NULL" : klass->external_name() ));
+
+ // do everything manually, since this is a proxy - needs special care
+ JNIEnv* jni_env = real_thread->jni_environment();
+ jthread jt = (jthread)JNIHandles::make_local(real_thread, real_thread->threadObj());
+ jclass jk = (jclass)JNIHandles::make_local(real_thread, klass->java_mirror());
+
+ // Before we call the JVMTI agent, we have to set the state in the
+ // thread for which we are proxying.
+ JavaThreadState prev_state = real_thread->thread_state();
+ assert(((Thread *)real_thread)->is_ConcurrentGC_thread() ||
+ (real_thread->is_Java_thread() && prev_state == _thread_blocked),
+ "should be ConcurrentGCThread or JavaThread at safepoint");
+ real_thread->set_thread_state(_thread_in_native);
+
+ jvmtiExtensionEvent callback = env->ext_callbacks()->ClassUnload;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jni_env, jt, jk);
+ }
+
+ assert(real_thread->thread_state() == _thread_in_native,
+ "JavaThread should be in native");
+ real_thread->set_thread_state(prev_state);
+
+ JNIHandles::destroy_local(jk);
+ JNIHandles::destroy_local(jt);
+ }
+ }
+ }
+}
+
+
+void JvmtiExport::post_thread_start(JavaThread *thread) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Trg Thread Start event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ // do JVMTI thread initialization (if needed)
+ JvmtiEventController::thread_started(thread);
+
+ // Do not post thread start event for hidden java thread.
+ if (JvmtiEventController::is_enabled(JVMTI_EVENT_THREAD_START) &&
+ !thread->is_hidden_from_external_view()) {
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
+ continue;
+ }
+ if (env->is_enabled(JVMTI_EVENT_THREAD_START)) {
+ EVT_TRACE(JVMTI_EVENT_THREAD_START, ("[%s] Evt Thread Start event sent",
+ JvmtiTrace::safe_get_thread_name(thread) ));
+
+ JvmtiThreadEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventThreadStart callback = env->callbacks()->ThreadStart;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
+ }
+ }
+ }
+ }
+}
+
+
+void JvmtiExport::post_thread_end(JavaThread *thread) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ EVT_TRIG_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Trg Thread End event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+
+ // Do not post thread end event for hidden java thread.
+ if (state->is_enabled(JVMTI_EVENT_THREAD_END) &&
+ !thread->is_hidden_from_external_view()) {
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_THREAD_END)) {
+ JvmtiEnv *env = ets->get_env();
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
+ continue;
+ }
+ EVT_TRACE(JVMTI_EVENT_THREAD_END, ("[%s] Evt Thread End event sent",
+ JvmtiTrace::safe_get_thread_name(thread) ));
+
+ JvmtiThreadEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventThreadEnd callback = env->callbacks()->ThreadEnd;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread());
+ }
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_object_free(JvmtiEnv* env, jlong tag) {
+ assert(SafepointSynchronize::is_at_safepoint(), "must be executed at safepoint");
+ assert(env->is_enabled(JVMTI_EVENT_OBJECT_FREE), "checking");
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Trg Object Free triggered" ));
+ EVT_TRACE(JVMTI_EVENT_OBJECT_FREE, ("[?] Evt Object Free sent"));
+
+ jvmtiEventObjectFree callback = env->callbacks()->ObjectFree;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), tag);
+ }
+}
+
+void JvmtiExport::post_resource_exhausted(jint resource_exhausted_flags, const char* description) {
+ EVT_TRIG_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Trg resource exhausted event triggered" ));
+
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_RESOURCE_EXHAUSTED)) {
+ EVT_TRACE(JVMTI_EVENT_RESOURCE_EXHAUSTED, ("Evt resource exhausted event sent" ));
+
+ JavaThread *thread = JavaThread::current();
+ JvmtiThreadEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventResourceExhausted callback = env->callbacks()->ResourceExhausted;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(),
+ resource_exhausted_flags, NULL, description);
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_method_entry(JavaThread *thread, Method* method, frame current_frame) {
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Trg Method Entry triggered %s.%s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
+
+ JvmtiThreadState* state = thread->jvmti_thread_state();
+ if (state == NULL || !state->is_interp_only_mode()) {
+ // for any thread that actually wants method entry, interp_only_mode is set
+ return;
+ }
+
+ state->incr_cur_stack_depth();
+
+ if (state->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_METHOD_ENTRY)) {
+ EVT_TRACE(JVMTI_EVENT_METHOD_ENTRY, ("[%s] Evt Method Entry sent %s.%s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiMethodEventMark jem(thread, mh);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventMethodEntry callback = env->callbacks()->MethodEntry;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_methodID());
+ }
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_method_exit(JavaThread *thread, Method* method, frame current_frame) {
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Trg Method Exit triggered %s.%s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL || !state->is_interp_only_mode()) {
+ // for any thread that actually wants method exit, interp_only_mode is set
+ return;
+ }
+
+ // return a flag when a method terminates by throwing an exception
+ // i.e. if an exception is thrown and it's not caught by the current method
+ bool exception_exit = state->is_exception_detected() && !state->is_exception_caught();
+
+
+ if (state->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
+ Handle result;
+ jvalue value;
+ value.j = 0L;
+
+ // if the method hasn't been popped because of an exception then we populate
+ // the return_value parameter for the callback. At this point we only have
+ // the address of a "raw result" and we just call into the interpreter to
+ // convert this into a jvalue.
+ if (!exception_exit) {
+ oop oop_result;
+ BasicType type = current_frame.interpreter_frame_result(&oop_result, &value);
+ if (type == T_OBJECT || type == T_ARRAY) {
+ result = Handle(thread, oop_result);
+ }
+ }
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_METHOD_EXIT)) {
+ EVT_TRACE(JVMTI_EVENT_METHOD_EXIT, ("[%s] Evt Method Exit sent %s.%s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiMethodEventMark jem(thread, mh);
+ if (result.not_null()) {
+ value.l = JNIHandles::make_local(thread, result());
+ }
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventMethodExit callback = env->callbacks()->MethodExit;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), exception_exit, value);
+ }
+ }
+ }
+ }
+
+ if (state->is_enabled(JVMTI_EVENT_FRAME_POP)) {
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ int cur_frame_number = state->cur_stack_depth();
+
+ if (ets->is_frame_pop(cur_frame_number)) {
+ // we have a NotifyFramePop entry for this frame.
+ // now check that this env/thread wants this event
+ if (ets->is_enabled(JVMTI_EVENT_FRAME_POP)) {
+ EVT_TRACE(JVMTI_EVENT_FRAME_POP, ("[%s] Evt Frame Pop sent %s.%s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string() ));
+
+ // we also need to issue a frame pop event for this frame
+ JvmtiEnv *env = ets->get_env();
+ JvmtiMethodEventMark jem(thread, mh);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventFramePop callback = env->callbacks()->FramePop;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), exception_exit);
+ }
+ }
+ // remove the frame's entry
+ ets->clear_frame_pop(cur_frame_number);
+ }
+ }
+ }
+
+ state->decr_cur_stack_depth();
+}
+
+
+// Todo: inline this for optimization
+void JvmtiExport::post_single_step(JavaThread *thread, Method* method, address location) {
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ ets->compare_and_set_current_location(mh(), location, JVMTI_EVENT_SINGLE_STEP);
+ if (!ets->single_stepping_posted() && ets->is_enabled(JVMTI_EVENT_SINGLE_STEP)) {
+ EVT_TRACE(JVMTI_EVENT_SINGLE_STEP, ("[%s] Evt Single Step sent %s.%s @ " INTX_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
+ location - mh()->code_base() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiLocationEventMark jem(thread, mh, location);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventSingleStep callback = env->callbacks()->SingleStep;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), jem.location());
+ }
+
+ ets->set_single_stepping_posted();
+ }
+ }
+}
+
+void JvmtiExport::post_exception_throw(JavaThread *thread, Method* method, address location, oop exception) {
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+ Handle exception_handle(thread, exception);
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION, ("[%s] Trg Exception thrown triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ if (!state->is_exception_detected()) {
+ state->set_exception_detected();
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_EXCEPTION) && (exception != NULL)) {
+
+ EVT_TRACE(JVMTI_EVENT_EXCEPTION,
+ ("[%s] Evt Exception thrown sent %s.%s @ " INTX_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
+ location - mh()->code_base() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
+
+ // It's okay to clear these exceptions here because we duplicate
+ // this lookup in InterpreterRuntime::exception_handler_for_exception.
+ EXCEPTION_MARK;
+
+ bool should_repeat;
+ vframeStream st(thread);
+ assert(!st.at_end(), "cannot be at end");
+ Method* current_method = NULL;
+ // A GC may occur during the Method::fast_exception_handler_bci_for()
+ // call below if it needs to load the constraint class. Using a
+ // methodHandle to keep the 'current_method' from being deallocated
+ // if GC happens.
+ methodHandle current_mh = methodHandle(thread, current_method);
+ int current_bci = -1;
+ do {
+ current_method = st.method();
+ current_mh = methodHandle(thread, current_method);
+ current_bci = st.bci();
+ do {
+ should_repeat = false;
+ Klass* eh_klass = exception_handle()->klass();
+ current_bci = Method::fast_exception_handler_bci_for(
+ current_mh, eh_klass, current_bci, THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ exception_handle = Handle(thread, PENDING_EXCEPTION);
+ CLEAR_PENDING_EXCEPTION;
+ should_repeat = true;
+ }
+ } while (should_repeat && (current_bci != -1));
+ st.next();
+ } while ((current_bci < 0) && (!st.at_end()));
+
+ jmethodID catch_jmethodID;
+ if (current_bci < 0) {
+ catch_jmethodID = 0;
+ current_bci = 0;
+ } else {
+ catch_jmethodID = jem.to_jmethodID(current_mh);
+ }
+
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventException callback = env->callbacks()->Exception;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), jem.location(),
+ jem.exception(),
+ catch_jmethodID, current_bci);
+ }
+ }
+ }
+ }
+
+ // frames may get popped because of this throw, be safe - invalidate cached depth
+ state->invalidate_cur_stack_depth();
+}
+
+
+void JvmtiExport::notice_unwind_due_to_exception(JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) {
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+ Handle exception_handle(thread, exception);
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ EVT_TRIG_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
+ ("[%s] Trg unwind_due_to_exception triggered %s.%s @ %s" INTX_FORMAT " - %s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
+ location==0? "no location:" : "",
+ location==0? 0 : location - mh()->code_base(),
+ in_handler_frame? "in handler frame" : "not handler frame" ));
+
+ if (state->is_exception_detected()) {
+
+ state->invalidate_cur_stack_depth();
+ if (!in_handler_frame) {
+ // Not in exception handler.
+ if(state->is_interp_only_mode()) {
+ // method exit and frame pop events are posted only in interp mode.
+ // When these events are enabled code should be in running in interp mode.
+ JvmtiExport::post_method_exit(thread, method, thread->last_frame());
+ // The cached cur_stack_depth might have changed from the
+ // operations of frame pop or method exit. We are not 100% sure
+ // the cached cur_stack_depth is still valid depth so invalidate
+ // it.
+ state->invalidate_cur_stack_depth();
+ }
+ } else {
+ // In exception handler frame. Report exception catch.
+ assert(location != NULL, "must be a known location");
+ // Update cur_stack_depth - the frames above the current frame
+ // have been unwound due to this exception:
+ assert(!state->is_exception_caught(), "exception must not be caught yet.");
+ state->set_exception_caught();
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_EXCEPTION_CATCH) && (exception_handle() != NULL)) {
+ EVT_TRACE(JVMTI_EVENT_EXCEPTION_CATCH,
+ ("[%s] Evt ExceptionCatch sent %s.%s @ " INTX_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
+ location - mh()->code_base() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiExceptionEventMark jem(thread, mh, location, exception_handle);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventExceptionCatch callback = env->callbacks()->ExceptionCatch;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), jem.location(),
+ jem.exception());
+ }
+ }
+ }
+ }
+ }
+}
+
+oop JvmtiExport::jni_GetField_probe(JavaThread *thread, jobject jobj, oop obj,
+ Klass* klass, jfieldID fieldID, bool is_static) {
+ if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
+ // At least one field access watch is set so we have more work
+ // to do. This wrapper is used by entry points that allow us
+ // to create handles in post_field_access_by_jni().
+ post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
+ // event posting can block so refetch oop if we were passed a jobj
+ if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
+ }
+ return obj;
+}
+
+oop JvmtiExport::jni_GetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
+ Klass* klass, jfieldID fieldID, bool is_static) {
+ if (*((int *)get_field_access_count_addr()) > 0 && thread->has_last_Java_frame()) {
+ // At least one field access watch is set so we have more work
+ // to do. This wrapper is used by "quick" entry points that don't
+ // allow us to create handles in post_field_access_by_jni(). We
+ // override that with a ResetNoHandleMark.
+ ResetNoHandleMark rnhm;
+ post_field_access_by_jni(thread, obj, klass, fieldID, is_static);
+ // event posting can block so refetch oop if we were passed a jobj
+ if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
+ }
+ return obj;
+}
+
+void JvmtiExport::post_field_access_by_jni(JavaThread *thread, oop obj,
+ Klass* klass, jfieldID fieldID, bool is_static) {
+ // We must be called with a Java context in order to provide reasonable
+ // values for the klazz, method, and location fields. The callers of this
+ // function don't make the call unless there is a Java context.
+ assert(thread->has_last_Java_frame(), "must be called with a Java context");
+
+ ResourceMark rm;
+ fieldDescriptor fd;
+ // if get_field_descriptor finds fieldID to be invalid, then we just bail
+ bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
+ assert(valid_fieldID == true,"post_field_access_by_jni called with invalid fieldID");
+ if (!valid_fieldID) return;
+ // field accesses are not watched so bail
+ if (!fd.is_field_access_watched()) return;
+
+ HandleMark hm(thread);
+ Handle h_obj;
+ if (!is_static) {
+ // non-static field accessors have an object, but we need a handle
+ assert(obj != NULL, "non-static needs an object");
+ h_obj = Handle(thread, obj);
+ }
+ post_field_access(thread,
+ thread->last_frame().interpreter_frame_method(),
+ thread->last_frame().interpreter_frame_bcp(),
+ klass, h_obj, fieldID);
+}
+
+void JvmtiExport::post_field_access(JavaThread *thread, Method* method,
+ address location, Klass* field_klass, Handle object, jfieldID field) {
+
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Trg Field Access event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_FIELD_ACCESS)) {
+ EVT_TRACE(JVMTI_EVENT_FIELD_ACCESS, ("[%s] Evt Field Access event sent %s.%s @ " INTX_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
+ location - mh()->code_base() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiLocationEventMark jem(thread, mh, location);
+ jclass field_jclass = jem.to_jclass(field_klass);
+ jobject field_jobject = jem.to_jobject(object());
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventFieldAccess callback = env->callbacks()->FieldAccess;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), jem.location(),
+ field_jclass, field_jobject, field);
+ }
+ }
+ }
+}
+
+oop JvmtiExport::jni_SetField_probe(JavaThread *thread, jobject jobj, oop obj,
+ Klass* klass, jfieldID fieldID, bool is_static,
+ char sig_type, jvalue *value) {
+ if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
+ // At least one field modification watch is set so we have more work
+ // to do. This wrapper is used by entry points that allow us
+ // to create handles in post_field_modification_by_jni().
+ post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
+ // event posting can block so refetch oop if we were passed a jobj
+ if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
+ }
+ return obj;
+}
+
+oop JvmtiExport::jni_SetField_probe_nh(JavaThread *thread, jobject jobj, oop obj,
+ Klass* klass, jfieldID fieldID, bool is_static,
+ char sig_type, jvalue *value) {
+ if (*((int *)get_field_modification_count_addr()) > 0 && thread->has_last_Java_frame()) {
+ // At least one field modification watch is set so we have more work
+ // to do. This wrapper is used by "quick" entry points that don't
+ // allow us to create handles in post_field_modification_by_jni(). We
+ // override that with a ResetNoHandleMark.
+ ResetNoHandleMark rnhm;
+ post_field_modification_by_jni(thread, obj, klass, fieldID, is_static, sig_type, value);
+ // event posting can block so refetch oop if we were passed a jobj
+ if (jobj != NULL) return JNIHandles::resolve_non_null(jobj);
+ }
+ return obj;
+}
+
+void JvmtiExport::post_field_modification_by_jni(JavaThread *thread, oop obj,
+ Klass* klass, jfieldID fieldID, bool is_static,
+ char sig_type, jvalue *value) {
+ // We must be called with a Java context in order to provide reasonable
+ // values for the klazz, method, and location fields. The callers of this
+ // function don't make the call unless there is a Java context.
+ assert(thread->has_last_Java_frame(), "must be called with Java context");
+
+ ResourceMark rm;
+ fieldDescriptor fd;
+ // if get_field_descriptor finds fieldID to be invalid, then we just bail
+ bool valid_fieldID = JvmtiEnv::get_field_descriptor(klass, fieldID, &fd);
+ assert(valid_fieldID == true,"post_field_modification_by_jni called with invalid fieldID");
+ if (!valid_fieldID) return;
+ // field modifications are not watched so bail
+ if (!fd.is_field_modification_watched()) return;
+
+ HandleMark hm(thread);
+
+ Handle h_obj;
+ if (!is_static) {
+ // non-static field accessors have an object, but we need a handle
+ assert(obj != NULL, "non-static needs an object");
+ h_obj = Handle(thread, obj);
+ }
+ post_field_modification(thread,
+ thread->last_frame().interpreter_frame_method(),
+ thread->last_frame().interpreter_frame_bcp(),
+ klass, h_obj, fieldID, sig_type, value);
+}
+
+void JvmtiExport::post_raw_field_modification(JavaThread *thread, Method* method,
+ address location, Klass* field_klass, Handle object, jfieldID field,
+ char sig_type, jvalue *value) {
+
+ if (sig_type == 'I' || sig_type == 'Z' || sig_type == 'B' || sig_type == 'C' || sig_type == 'S') {
+ // 'I' instructions are used for byte, char, short and int.
+ // determine which it really is, and convert
+ fieldDescriptor fd;
+ bool found = JvmtiEnv::get_field_descriptor(field_klass, field, &fd);
+ // should be found (if not, leave as is)
+ if (found) {
+ jint ival = value->i;
+ // convert value from int to appropriate type
+ switch (fd.field_type()) {
+ case T_BOOLEAN:
+ sig_type = 'Z';
+ value->i = 0; // clear it
+ value->z = (jboolean)ival;
+ break;
+ case T_BYTE:
+ sig_type = 'B';
+ value->i = 0; // clear it
+ value->b = (jbyte)ival;
+ break;
+ case T_CHAR:
+ sig_type = 'C';
+ value->i = 0; // clear it
+ value->c = (jchar)ival;
+ break;
+ case T_SHORT:
+ sig_type = 'S';
+ value->i = 0; // clear it
+ value->s = (jshort)ival;
+ break;
+ case T_INT:
+ // nothing to do
+ break;
+ default:
+ // this is an integer instruction, should be one of above
+ ShouldNotReachHere();
+ break;
+ }
+ }
+ }
+
+ assert(sig_type != '[', "array should have sig_type == 'L'");
+ bool handle_created = false;
+
+ // convert oop to JNI handle.
+ if (sig_type == 'L') {
+ handle_created = true;
+ value->l = (jobject)JNIHandles::make_local(thread, (oop)value->l);
+ }
+
+ post_field_modification(thread, method, location, field_klass, object, field, sig_type, value);
+
+ // Destroy the JNI handle allocated above.
+ if (handle_created) {
+ JNIHandles::destroy_local(value->l);
+ }
+}
+
+void JvmtiExport::post_field_modification(JavaThread *thread, Method* method,
+ address location, Klass* field_klass, Handle object, jfieldID field,
+ char sig_type, jvalue *value_ptr) {
+
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+ EVT_TRIG_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
+ ("[%s] Trg Field Modification event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_FIELD_MODIFICATION)) {
+ EVT_TRACE(JVMTI_EVENT_FIELD_MODIFICATION,
+ ("[%s] Evt Field Modification event sent %s.%s @ " INTX_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread),
+ (mh() == NULL) ? "NULL" : mh()->klass_name()->as_C_string(),
+ (mh() == NULL) ? "NULL" : mh()->name()->as_C_string(),
+ location - mh()->code_base() ));
+
+ JvmtiEnv *env = ets->get_env();
+ JvmtiLocationEventMark jem(thread, mh, location);
+ jclass field_jclass = jem.to_jclass(field_klass);
+ jobject field_jobject = jem.to_jobject(object());
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventFieldModification callback = env->callbacks()->FieldModification;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_methodID(), jem.location(),
+ field_jclass, field_jobject, field, sig_type, *value_ptr);
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_native_method_bind(Method* method, address* function_ptr) {
+ JavaThread* thread = JavaThread::current();
+ assert(thread->thread_state() == _thread_in_vm, "must be in vm state");
+
+ HandleMark hm(thread);
+ methodHandle mh(thread, method);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Trg Native Method Bind event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ if (JvmtiEventController::is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_NATIVE_METHOD_BIND)) {
+ EVT_TRACE(JVMTI_EVENT_NATIVE_METHOD_BIND, ("[%s] Evt Native Method Bind event sent",
+ JvmtiTrace::safe_get_thread_name(thread) ));
+
+ JvmtiMethodEventMark jem(thread, mh);
+ JvmtiJavaThreadEventTransition jet(thread);
+ JNIEnv* jni_env = (env->phase() == JVMTI_PHASE_PRIMORDIAL) ? NULL : jem.jni_env();
+ jvmtiEventNativeMethodBind callback = env->callbacks()->NativeMethodBind;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jni_env, jem.jni_thread(),
+ jem.jni_methodID(), (void*)(*function_ptr), (void**)function_ptr);
+ }
+ }
+ }
+ }
+}
+
+// Returns a record containing inlining information for the given nmethod
+jvmtiCompiledMethodLoadInlineRecord* create_inline_record(nmethod* nm) {
+ jint numstackframes = 0;
+ jvmtiCompiledMethodLoadInlineRecord* record = (jvmtiCompiledMethodLoadInlineRecord*)NEW_RESOURCE_OBJ(jvmtiCompiledMethodLoadInlineRecord);
+ record->header.kind = JVMTI_CMLR_INLINE_INFO;
+ record->header.next = NULL;
+ record->header.majorinfoversion = JVMTI_CMLR_MAJOR_VERSION_1;
+ record->header.minorinfoversion = JVMTI_CMLR_MINOR_VERSION_0;
+ record->numpcs = 0;
+ for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
+ if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
+ record->numpcs++;
+ }
+ record->pcinfo = (PCStackInfo*)(NEW_RESOURCE_ARRAY(PCStackInfo, record->numpcs));
+ int scope = 0;
+ for(PcDesc* p = nm->scopes_pcs_begin(); p < nm->scopes_pcs_end(); p++) {
+ if(p->scope_decode_offset() == DebugInformationRecorder::serialized_null) continue;
+ void* pc_address = (void*)p->real_pc(nm);
+ assert(pc_address != NULL, "pc_address must be non-null");
+ record->pcinfo[scope].pc = pc_address;
+ numstackframes=0;
+ for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
+ numstackframes++;
+ }
+ assert(numstackframes != 0, "numstackframes must be nonzero.");
+ record->pcinfo[scope].methods = (jmethodID *)NEW_RESOURCE_ARRAY(jmethodID, numstackframes);
+ record->pcinfo[scope].bcis = (jint *)NEW_RESOURCE_ARRAY(jint, numstackframes);
+ record->pcinfo[scope].numstackframes = numstackframes;
+ int stackframe = 0;
+ for(ScopeDesc* sd = nm->scope_desc_at(p->real_pc(nm));sd != NULL;sd = sd->sender()) {
+ // sd->method() can be NULL for stubs but not for nmethods. To be completely robust, include an assert that we should never see a null sd->method()
+ assert(sd->method() != NULL, "sd->method() cannot be null.");
+ record->pcinfo[scope].methods[stackframe] = sd->method()->jmethod_id();
+ record->pcinfo[scope].bcis[stackframe] = sd->bci();
+ stackframe++;
+ }
+ scope++;
+ }
+ return record;
+}
+
+void JvmtiExport::post_compiled_method_load(nmethod *nm) {
+ if (JvmtiEnv::get_phase() < JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ JavaThread* thread = JavaThread::current();
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
+ ("[%s] method compile load event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
+ if (env->phase() == JVMTI_PHASE_PRIMORDIAL) {
+ continue;
+ }
+ EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
+ ("[%s] class compile method load event sent %s.%s ",
+ JvmtiTrace::safe_get_thread_name(thread),
+ (nm->method() == NULL) ? "NULL" : nm->method()->klass_name()->as_C_string(),
+ (nm->method() == NULL) ? "NULL" : nm->method()->name()->as_C_string()));
+ ResourceMark rm(thread);
+ HandleMark hm(thread);
+
+ // Add inlining information
+ jvmtiCompiledMethodLoadInlineRecord* inlinerecord = create_inline_record(nm);
+ // Pass inlining information through the void pointer
+ JvmtiCompiledMethodLoadEventMark jem(thread, nm, inlinerecord);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_methodID(),
+ jem.code_size(), jem.code_data(), jem.map_length(),
+ jem.map(), jem.compile_info());
+ }
+ }
+ }
+}
+
+
+// post a COMPILED_METHOD_LOAD event for a given environment
+void JvmtiExport::post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length,
+ const void *code_begin, const jint map_length,
+ const jvmtiAddrLocationMap* map)
+{
+ if (env->phase() <= JVMTI_PHASE_PRIMORDIAL) {
+ return;
+ }
+ JavaThread* thread = JavaThread::current();
+ EVT_TRIG_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
+ ("[%s] method compile load event triggered (by GenerateEvents)",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ if (env->is_enabled(JVMTI_EVENT_COMPILED_METHOD_LOAD)) {
+
+ EVT_TRACE(JVMTI_EVENT_COMPILED_METHOD_LOAD,
+ ("[%s] class compile method load event sent (by GenerateEvents), jmethodID=" PTR_FORMAT,
+ JvmtiTrace::safe_get_thread_name(thread), p2i(method)));
+
+ JvmtiEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventCompiledMethodLoad callback = env->callbacks()->CompiledMethodLoad;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), method,
+ length, code_begin, map_length,
+ map, NULL);
+ }
+ }
+}
+
+void JvmtiExport::post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) {
+ assert(name != NULL && name[0] != '\0', "sanity check");
+
+ JavaThread* thread = JavaThread::current();
+ // In theory everyone coming thru here is in_vm but we need to be certain
+ // because a callee will do a vm->native transition
+ ThreadInVMfromUnknown __tiv;
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
+ ("[%s] method dynamic code generated event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
+ EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
+ ("[%s] dynamic code generated event sent for %s",
+ JvmtiTrace::safe_get_thread_name(thread), name));
+ JvmtiEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
+ jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) {
+ jvmtiPhase phase = JvmtiEnv::get_phase();
+ if (phase == JVMTI_PHASE_PRIMORDIAL || phase == JVMTI_PHASE_START) {
+ post_dynamic_code_generated_internal(name, code_begin, code_end);
+ } else {
+ // It may not be safe to post the event from this thread. Defer all
+ // postings to the service thread so that it can perform them in a safe
+ // context and in-order.
+ MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
+ JvmtiDeferredEvent event = JvmtiDeferredEvent::dynamic_code_generated_event(
+ name, code_begin, code_end);
+ JvmtiDeferredEventQueue::enqueue(event);
+ }
+}
+
+
+// post a DYNAMIC_CODE_GENERATED event for a given environment
+// used by GenerateEvents
+void JvmtiExport::post_dynamic_code_generated(JvmtiEnv* env, const char *name,
+ const void *code_begin, const void *code_end)
+{
+ JavaThread* thread = JavaThread::current();
+ EVT_TRIG_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
+ ("[%s] dynamic code generated event triggered (by GenerateEvents)",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ if (env->is_enabled(JVMTI_EVENT_DYNAMIC_CODE_GENERATED)) {
+ EVT_TRACE(JVMTI_EVENT_DYNAMIC_CODE_GENERATED,
+ ("[%s] dynamic code generated event sent for %s",
+ JvmtiTrace::safe_get_thread_name(thread), name));
+ JvmtiEventMark jem(thread);
+ JvmtiJavaThreadEventTransition jet(thread);
+ jint length = (jint)pointer_delta(code_end, code_begin, sizeof(char));
+ jvmtiEventDynamicCodeGenerated callback = env->callbacks()->DynamicCodeGenerated;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), name, (void*)code_begin, length);
+ }
+ }
+}
+
+// post a DynamicCodeGenerated event while holding locks in the VM.
+void JvmtiExport::post_dynamic_code_generated_while_holding_locks(const char* name,
+ address code_begin, address code_end)
+{
+ // register the stub with the current dynamic code event collector
+ JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
+ // state can only be NULL if the current thread is exiting which
+ // should not happen since we're trying to post an event
+ guarantee(state != NULL, "attempt to register stub via an exiting thread");
+ JvmtiDynamicCodeEventCollector* collector = state->get_dynamic_code_event_collector();
+ guarantee(collector != NULL, "attempt to register stub without event collector");
+ collector->register_stub(name, code_begin, code_end);
+}
+
+// Collect all the vm internally allocated objects which are visible to java world
+void JvmtiExport::record_vm_internal_object_allocation(oop obj) {
+ Thread* thread = Thread::current_or_null();
+ if (thread != NULL && thread->is_Java_thread()) {
+ // Can not take safepoint here.
+ NoSafepointVerifier no_sfpt;
+ // Can not take safepoint here so can not use state_for to get
+ // jvmti thread state.
+ JvmtiThreadState *state = ((JavaThread*)thread)->jvmti_thread_state();
+ if (state != NULL ) {
+ // state is non NULL when VMObjectAllocEventCollector is enabled.
+ JvmtiVMObjectAllocEventCollector *collector;
+ collector = state->get_vm_object_alloc_event_collector();
+ if (collector != NULL && collector->is_enabled()) {
+ // Don't record classes as these will be notified via the ClassLoad
+ // event.
+ if (obj->klass() != SystemDictionary::Class_klass()) {
+ collector->record_allocation(obj);
+ }
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_garbage_collection_finish() {
+ Thread *thread = Thread::current(); // this event is posted from VM-Thread.
+ EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
+ ("[%s] garbage collection finish event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH)) {
+ EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,
+ ("[%s] garbage collection finish event sent",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiThreadEventTransition jet(thread);
+ // JNIEnv is NULL here because this event is posted from VM Thread
+ jvmtiEventGarbageCollectionFinish callback = env->callbacks()->GarbageCollectionFinish;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external());
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_garbage_collection_start() {
+ Thread* thread = Thread::current(); // this event is posted from vm-thread.
+ EVT_TRIG_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
+ ("[%s] garbage collection start event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_GARBAGE_COLLECTION_START)) {
+ EVT_TRACE(JVMTI_EVENT_GARBAGE_COLLECTION_START,
+ ("[%s] garbage collection start event sent",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiThreadEventTransition jet(thread);
+ // JNIEnv is NULL here because this event is posted from VM Thread
+ jvmtiEventGarbageCollectionStart callback = env->callbacks()->GarbageCollectionStart;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external());
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_data_dump() {
+ Thread *thread = Thread::current();
+ EVT_TRIG_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
+ ("[%s] data dump request event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_DATA_DUMP_REQUEST)) {
+ EVT_TRACE(JVMTI_EVENT_DATA_DUMP_REQUEST,
+ ("[%s] data dump request event sent",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiThreadEventTransition jet(thread);
+ // JNIEnv is NULL here because this event is posted from VM Thread
+ jvmtiEventDataDumpRequest callback = env->callbacks()->DataDumpRequest;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external());
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) {
+ oop object = (oop)obj_mntr->object();
+ if (!ServiceUtil::visible_oop(object)) {
+ // Ignore monitor contended enter for vm internal object.
+ return;
+ }
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+
+ HandleMark hm(thread);
+ Handle h(thread, object);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
+ ("[%s] montior contended enter event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTER)) {
+ EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTER,
+ ("[%s] monitor contended enter event sent",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiMonitorEventMark jem(thread, h());
+ JvmtiEnv *env = ets->get_env();
+ JvmtiThreadEventTransition jet(thread);
+ jvmtiEventMonitorContendedEnter callback = env->callbacks()->MonitorContendedEnter;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) {
+ oop object = (oop)obj_mntr->object();
+ if (!ServiceUtil::visible_oop(object)) {
+ // Ignore monitor contended entered for vm internal object.
+ return;
+ }
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+
+ HandleMark hm(thread);
+ Handle h(thread, object);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
+ ("[%s] montior contended entered event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED)) {
+ EVT_TRACE(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED,
+ ("[%s] monitor contended enter event sent",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiMonitorEventMark jem(thread, h());
+ JvmtiEnv *env = ets->get_env();
+ JvmtiThreadEventTransition jet(thread);
+ jvmtiEventMonitorContendedEntered callback = env->callbacks()->MonitorContendedEntered;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(), jem.jni_object());
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_monitor_wait(JavaThread *thread, oop object,
+ jlong timeout) {
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+
+ HandleMark hm(thread);
+ Handle h(thread, object);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAIT,
+ ("[%s] montior wait event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAIT)) {
+ EVT_TRACE(JVMTI_EVENT_MONITOR_WAIT,
+ ("[%s] monitor wait event sent",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiMonitorEventMark jem(thread, h());
+ JvmtiEnv *env = ets->get_env();
+ JvmtiThreadEventTransition jet(thread);
+ jvmtiEventMonitorWait callback = env->callbacks()->MonitorWait;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_object(), timeout);
+ }
+ }
+ }
+}
+
+void JvmtiExport::post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) {
+ oop object = (oop)obj_mntr->object();
+ if (!ServiceUtil::visible_oop(object)) {
+ // Ignore monitor waited for vm internal object.
+ return;
+ }
+ JvmtiThreadState *state = thread->jvmti_thread_state();
+ if (state == NULL) {
+ return;
+ }
+
+ HandleMark hm(thread);
+ Handle h(thread, object);
+
+ EVT_TRIG_TRACE(JVMTI_EVENT_MONITOR_WAITED,
+ ("[%s] montior waited event triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+
+ JvmtiEnvThreadStateIterator it(state);
+ for (JvmtiEnvThreadState* ets = it.first(); ets != NULL; ets = it.next(ets)) {
+ if (ets->is_enabled(JVMTI_EVENT_MONITOR_WAITED)) {
+ EVT_TRACE(JVMTI_EVENT_MONITOR_WAITED,
+ ("[%s] monitor waited event sent",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ JvmtiMonitorEventMark jem(thread, h());
+ JvmtiEnv *env = ets->get_env();
+ JvmtiThreadEventTransition jet(thread);
+ jvmtiEventMonitorWaited callback = env->callbacks()->MonitorWaited;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_object(), timed_out);
+ }
+ }
+ }
+}
+
+
+void JvmtiExport::post_vm_object_alloc(JavaThread *thread, oop object) {
+ EVT_TRIG_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Trg vm object alloc triggered",
+ JvmtiTrace::safe_get_thread_name(thread)));
+ if (object == NULL) {
+ return;
+ }
+ HandleMark hm(thread);
+ Handle h(thread, object);
+ JvmtiEnvIterator it;
+ for (JvmtiEnv* env = it.first(); env != NULL; env = it.next(env)) {
+ if (env->is_enabled(JVMTI_EVENT_VM_OBJECT_ALLOC)) {
+ EVT_TRACE(JVMTI_EVENT_VM_OBJECT_ALLOC, ("[%s] Evt vmobject alloc sent %s",
+ JvmtiTrace::safe_get_thread_name(thread),
+ object==NULL? "NULL" : object->klass()->external_name()));
+
+ JvmtiVMObjectAllocEventMark jem(thread, h());
+ JvmtiJavaThreadEventTransition jet(thread);
+ jvmtiEventVMObjectAlloc callback = env->callbacks()->VMObjectAlloc;
+ if (callback != NULL) {
+ (*callback)(env->jvmti_external(), jem.jni_env(), jem.jni_thread(),
+ jem.jni_jobject(), jem.jni_class(), jem.size());
+ }
+ }
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////
+
+void JvmtiExport::cleanup_thread(JavaThread* thread) {
+ assert(JavaThread::current() == thread, "thread is not current");
+ MutexLocker mu(JvmtiThreadState_lock);
+
+ if (thread->jvmti_thread_state() != NULL) {
+ // This has to happen after the thread state is removed, which is
+ // why it is not in post_thread_end_event like its complement
+ // Maybe both these functions should be rolled into the posts?
+ JvmtiEventController::thread_ended(thread);
+ }
+}
+
+void JvmtiExport::clear_detected_exception(JavaThread* thread) {
+ assert(JavaThread::current() == thread, "thread is not current");
+
+ JvmtiThreadState* state = thread->jvmti_thread_state();
+ if (state != NULL) {
+ state->clear_exception_state();
+ }
+}
+
+void JvmtiExport::oops_do(OopClosure* f) {
+ JvmtiCurrentBreakpoints::oops_do(f);
+ JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(f);
+}
+
+void JvmtiExport::weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f) {
+ JvmtiTagMap::weak_oops_do(is_alive, f);
+}
+
+void JvmtiExport::gc_epilogue() {
+ JvmtiCurrentBreakpoints::gc_epilogue();
+}
+
+// Onload raw monitor transition.
+void JvmtiExport::transition_pending_onload_raw_monitors() {
+ JvmtiPendingMonitors::transition_raw_monitors();
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////
+#if INCLUDE_SERVICES
+// Attach is disabled if SERVICES is not included
+
+// type for the Agent_OnAttach entry point
+extern "C" {
+ typedef jint (JNICALL *OnAttachEntry_t)(JavaVM*, char *, void *);
+}
+
+jint JvmtiExport::load_agent_library(const char *agent, const char *absParam,
+ const char *options, outputStream* st) {
+ char ebuf[1024];
+ char buffer[JVM_MAXPATHLEN];
+ void* library = NULL;
+ jint result = JNI_ERR;
+ const char *on_attach_symbols[] = AGENT_ONATTACH_SYMBOLS;
+ size_t num_symbol_entries = ARRAY_SIZE(on_attach_symbols);
+
+ // The abs paramter should be "true" or "false"
+ bool is_absolute_path = (absParam != NULL) && (strcmp(absParam,"true")==0);
+
+ // Initially marked as invalid. It will be set to valid if we can find the agent
+ AgentLibrary *agent_lib = new AgentLibrary(agent, options, is_absolute_path, NULL);
+
+ // Check for statically linked in agent. If not found then if the path is
+ // absolute we attempt to load the library. Otherwise we try to load it
+ // from the standard dll directory.
+
+ if (!os::find_builtin_agent(agent_lib, on_attach_symbols, num_symbol_entries)) {
+ if (is_absolute_path) {
+ library = os::dll_load(agent, ebuf, sizeof ebuf);
+ } else {
+ // Try to load the agent from the standard dll directory
+ if (os::dll_locate_lib(buffer, sizeof(buffer), Arguments::get_dll_dir(),
+ agent)) {
+ library = os::dll_load(buffer, ebuf, sizeof ebuf);
+ }
+ if (library == NULL) {
+ // not found - try OS default library path
+ if (os::dll_build_name(buffer, sizeof(buffer), agent)) {
+ library = os::dll_load(buffer, ebuf, sizeof ebuf);
+ }
+ }
+ }
+ if (library != NULL) {
+ agent_lib->set_os_lib(library);
+ agent_lib->set_valid();
+ }
+ }
+ // If the library was loaded then we attempt to invoke the Agent_OnAttach
+ // function
+ if (agent_lib->valid()) {
+ // Lookup the Agent_OnAttach function
+ OnAttachEntry_t on_attach_entry = NULL;
+ on_attach_entry = CAST_TO_FN_PTR(OnAttachEntry_t,
+ os::find_agent_function(agent_lib, false, on_attach_symbols, num_symbol_entries));
+ if (on_attach_entry == NULL) {
+ // Agent_OnAttach missing - unload library
+ if (!agent_lib->is_static_lib()) {
+ os::dll_unload(library);
+ }
+ delete agent_lib;
+ } else {
+ // Invoke the Agent_OnAttach function
+ JavaThread* THREAD = JavaThread::current();
+ {
+ extern struct JavaVM_ main_vm;
+ JvmtiThreadEventMark jem(THREAD);
+ JvmtiJavaThreadEventTransition jet(THREAD);
+
+ result = (*on_attach_entry)(&main_vm, (char*)options, NULL);
+ }
+
+ // Agent_OnAttach may have used JNI
+ if (HAS_PENDING_EXCEPTION) {
+ CLEAR_PENDING_EXCEPTION;
+ }
+
+ // If OnAttach returns JNI_OK then we add it to the list of
+ // agent libraries so that we can call Agent_OnUnload later.
+ if (result == JNI_OK) {
+ Arguments::add_loaded_agent(agent_lib);
+ } else {
+ delete agent_lib;
+ }
+
+ // Agent_OnAttach executed so completion status is JNI_OK
+ st->print_cr("%d", result);
+ result = JNI_OK;
+ }
+ }
+ return result;
+}
+
+#endif // INCLUDE_SERVICES
+////////////////////////////////////////////////////////////////////////////////////////////////
+
+// Setup current current thread for event collection.
+void JvmtiEventCollector::setup_jvmti_thread_state() {
+ // set this event collector to be the current one.
+ JvmtiThreadState* state = JvmtiThreadState::state_for(JavaThread::current());
+ // state can only be NULL if the current thread is exiting which
+ // should not happen since we're trying to configure for event collection
+ guarantee(state != NULL, "exiting thread called setup_jvmti_thread_state");
+ if (is_vm_object_alloc_event()) {
+ _prev = state->get_vm_object_alloc_event_collector();
+ state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)this);
+ } else if (is_dynamic_code_event()) {
+ _prev = state->get_dynamic_code_event_collector();
+ state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)this);
+ }
+}
+
+// Unset current event collection in this thread and reset it with previous
+// collector.
+void JvmtiEventCollector::unset_jvmti_thread_state() {
+ JvmtiThreadState* state = JavaThread::current()->jvmti_thread_state();
+ if (state != NULL) {
+ // restore the previous event collector (if any)
+ if (is_vm_object_alloc_event()) {
+ if (state->get_vm_object_alloc_event_collector() == this) {
+ state->set_vm_object_alloc_event_collector((JvmtiVMObjectAllocEventCollector *)_prev);
+ } else {
+ // this thread's jvmti state was created during the scope of
+ // the event collector.
+ }
+ } else {
+ if (is_dynamic_code_event()) {
+ if (state->get_dynamic_code_event_collector() == this) {
+ state->set_dynamic_code_event_collector((JvmtiDynamicCodeEventCollector *)_prev);
+ } else {
+ // this thread's jvmti state was created during the scope of
+ // the event collector.
+ }
+ }
+ }
+ }
+}
+
+// create the dynamic code event collector
+JvmtiDynamicCodeEventCollector::JvmtiDynamicCodeEventCollector() : _code_blobs(NULL) {
+ if (JvmtiExport::should_post_dynamic_code_generated()) {
+ setup_jvmti_thread_state();
+ }
+}
+
+// iterate over any code blob descriptors collected and post a
+// DYNAMIC_CODE_GENERATED event to the profiler.
+JvmtiDynamicCodeEventCollector::~JvmtiDynamicCodeEventCollector() {
+ assert(!JavaThread::current()->owns_locks(), "all locks must be released to post deferred events");
+ // iterate over any code blob descriptors that we collected
+ if (_code_blobs != NULL) {
+ for (int i=0; i<_code_blobs->length(); i++) {
+ JvmtiCodeBlobDesc* blob = _code_blobs->at(i);
+ JvmtiExport::post_dynamic_code_generated(blob->name(), blob->code_begin(), blob->code_end());
+ FreeHeap(blob);
+ }
+ delete _code_blobs;
+ }
+ unset_jvmti_thread_state();
+}
+
+// register a stub
+void JvmtiDynamicCodeEventCollector::register_stub(const char* name, address start, address end) {
+ if (_code_blobs == NULL) {
+ _code_blobs = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JvmtiCodeBlobDesc*>(1,true);
+ }
+ _code_blobs->append(new JvmtiCodeBlobDesc(name, start, end));
+}
+
+// Setup current thread to record vm allocated objects.
+JvmtiVMObjectAllocEventCollector::JvmtiVMObjectAllocEventCollector() : _allocated(NULL) {
+ if (JvmtiExport::should_post_vm_object_alloc()) {
+ _enable = true;
+ setup_jvmti_thread_state();
+ } else {
+ _enable = false;
+ }
+}
+
+// Post vm_object_alloc event for vm allocated objects visible to java
+// world.
+JvmtiVMObjectAllocEventCollector::~JvmtiVMObjectAllocEventCollector() {
+ if (_allocated != NULL) {
+ set_enabled(false);
+ for (int i = 0; i < _allocated->length(); i++) {
+ oop obj = _allocated->at(i);
+ if (ServiceUtil::visible_oop(obj)) {
+ JvmtiExport::post_vm_object_alloc(JavaThread::current(), obj);
+ }
+ }
+ delete _allocated;
+ }
+ unset_jvmti_thread_state();
+}
+
+void JvmtiVMObjectAllocEventCollector::record_allocation(oop obj) {
+ assert(is_enabled(), "VM object alloc event collector is not enabled");
+ if (_allocated == NULL) {
+ _allocated = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<oop>(1, true);
+ }
+ _allocated->push(obj);
+}
+
+// GC support.
+void JvmtiVMObjectAllocEventCollector::oops_do(OopClosure* f) {
+ if (_allocated != NULL) {
+ for(int i=_allocated->length() - 1; i >= 0; i--) {
+ if (_allocated->at(i) != NULL) {
+ f->do_oop(_allocated->adr_at(i));
+ }
+ }
+ }
+}
+
+void JvmtiVMObjectAllocEventCollector::oops_do_for_all_threads(OopClosure* f) {
+ // no-op if jvmti not enabled
+ if (!JvmtiEnv::environments_might_exist()) {
+ return;
+ }
+
+ // Runs at safepoint. So no need to acquire Threads_lock.
+ for (JavaThread *jthr = Threads::first(); jthr != NULL; jthr = jthr->next()) {
+ JvmtiThreadState *state = jthr->jvmti_thread_state();
+ if (state != NULL) {
+ JvmtiVMObjectAllocEventCollector *collector;
+ collector = state->get_vm_object_alloc_event_collector();
+ while (collector != NULL) {
+ collector->oops_do(f);
+ collector = (JvmtiVMObjectAllocEventCollector *)collector->get_prev();
+ }
+ }
+ }
+}
+
+
+// Disable collection of VMObjectAlloc events
+NoJvmtiVMObjectAllocMark::NoJvmtiVMObjectAllocMark() : _collector(NULL) {
+ // a no-op if VMObjectAlloc event is not enabled
+ if (!JvmtiExport::should_post_vm_object_alloc()) {
+ return;
+ }
+ Thread* thread = Thread::current_or_null();
+ if (thread != NULL && thread->is_Java_thread()) {
+ JavaThread* current_thread = (JavaThread*)thread;
+ JvmtiThreadState *state = current_thread->jvmti_thread_state();
+ if (state != NULL) {
+ JvmtiVMObjectAllocEventCollector *collector;
+ collector = state->get_vm_object_alloc_event_collector();
+ if (collector != NULL && collector->is_enabled()) {
+ _collector = collector;
+ _collector->set_enabled(false);
+ }
+ }
+ }
+}
+
+// Re-Enable collection of VMObjectAlloc events (if previously enabled)
+NoJvmtiVMObjectAllocMark::~NoJvmtiVMObjectAllocMark() {
+ if (was_enabled()) {
+ _collector->set_enabled(true);
+ }
+};
+
+JvmtiGCMarker::JvmtiGCMarker() {
+ // if there aren't any JVMTI environments then nothing to do
+ if (!JvmtiEnv::environments_might_exist()) {
+ return;
+ }
+
+ if (JvmtiExport::should_post_garbage_collection_start()) {
+ JvmtiExport::post_garbage_collection_start();
+ }
+
+ if (SafepointSynchronize::is_at_safepoint()) {
+ // Do clean up tasks that need to be done at a safepoint
+ JvmtiEnvBase::check_for_periodic_clean_up();
+ }
+}
+
+JvmtiGCMarker::~JvmtiGCMarker() {
+ // if there aren't any JVMTI environments then nothing to do
+ if (!JvmtiEnv::environments_might_exist()) {
+ return;
+ }
+
+ // JVMTI notify gc finish
+ if (JvmtiExport::should_post_garbage_collection_finish()) {
+ JvmtiExport::post_garbage_collection_finish();
+ }
+}