| /* Copyright (C) 2016 The Android Open Source Project |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This file implements interfaces from the file jvmti.h. This implementation |
| * is licensed under the same terms as the file jvmti.h. The |
| * copyright and license information for the file jvmti.h follows. |
| * |
| * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 "events-inl.h" |
| |
| #include <array> |
| #include <sys/time.h> |
| |
| #include "art_field-inl.h" |
| #include "art_jvmti.h" |
| #include "art_method-inl.h" |
| #include "deopt_manager.h" |
| #include "dex/dex_file_types.h" |
| #include "gc/allocation_listener.h" |
| #include "gc/gc_pause_listener.h" |
| #include "gc/heap.h" |
| #include "gc/scoped_gc_critical_section.h" |
| #include "handle_scope-inl.h" |
| #include "instrumentation.h" |
| #include "jni/jni_env_ext-inl.h" |
| #include "jni/jni_internal.h" |
| #include "mirror/class.h" |
| #include "mirror/object-inl.h" |
| #include "monitor.h" |
| #include "nativehelper/scoped_local_ref.h" |
| #include "runtime.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "stack.h" |
| #include "thread-inl.h" |
| #include "thread_list.h" |
| #include "ti_phase.h" |
| #include "well_known_classes.h" |
| |
| namespace openjdkjvmti { |
| |
| void ArtJvmtiEventCallbacks::CopyExtensionsFrom(const ArtJvmtiEventCallbacks* cb) { |
| if (art::kIsDebugBuild) { |
| ArtJvmtiEventCallbacks clean; |
| DCHECK_EQ(memcmp(&clean, this, sizeof(clean)), 0) |
| << "CopyExtensionsFrom called with initialized eventsCallbacks!"; |
| } |
| if (cb != nullptr) { |
| memcpy(this, cb, sizeof(*this)); |
| } else { |
| memset(this, 0, sizeof(*this)); |
| } |
| } |
| |
| jvmtiError ArtJvmtiEventCallbacks::Set(jint index, jvmtiExtensionEvent cb) { |
| switch (index) { |
| case static_cast<jint>(ArtJvmtiEvent::kDdmPublishChunk): |
| DdmPublishChunk = reinterpret_cast<ArtJvmtiEventDdmPublishChunk>(cb); |
| return OK; |
| default: |
| return ERR(ILLEGAL_ARGUMENT); |
| } |
| } |
| |
| |
| bool IsExtensionEvent(jint e) { |
| return e >= static_cast<jint>(ArtJvmtiEvent::kMinEventTypeVal) && |
| e <= static_cast<jint>(ArtJvmtiEvent::kMaxEventTypeVal) && |
| IsExtensionEvent(static_cast<ArtJvmtiEvent>(e)); |
| } |
| |
| bool IsExtensionEvent(ArtJvmtiEvent e) { |
| switch (e) { |
| case ArtJvmtiEvent::kDdmPublishChunk: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| bool EventMasks::IsEnabledAnywhere(ArtJvmtiEvent event) { |
| return global_event_mask.Test(event) || unioned_thread_event_mask.Test(event); |
| } |
| |
| EventMask& EventMasks::GetEventMask(art::Thread* thread) { |
| if (thread == nullptr) { |
| return global_event_mask; |
| } |
| |
| for (auto& pair : thread_event_masks) { |
| const UniqueThread& unique_thread = pair.first; |
| if (unique_thread.first == thread && |
| unique_thread.second == static_cast<uint32_t>(thread->GetTid())) { |
| return pair.second; |
| } |
| } |
| |
| // TODO: Remove old UniqueThread with the same pointer, if exists. |
| |
| thread_event_masks.emplace_back(UniqueThread(thread, thread->GetTid()), EventMask()); |
| return thread_event_masks.back().second; |
| } |
| |
| EventMask* EventMasks::GetEventMaskOrNull(art::Thread* thread) { |
| if (thread == nullptr) { |
| return &global_event_mask; |
| } |
| |
| for (auto& pair : thread_event_masks) { |
| const UniqueThread& unique_thread = pair.first; |
| if (unique_thread.first == thread && |
| unique_thread.second == static_cast<uint32_t>(thread->GetTid())) { |
| return &pair.second; |
| } |
| } |
| |
| return nullptr; |
| } |
| |
| |
| void EventMasks::EnableEvent(ArtJvmTiEnv* env, art::Thread* thread, ArtJvmtiEvent event) { |
| DCHECK_EQ(&env->event_masks, this); |
| env->event_info_mutex_.AssertExclusiveHeld(art::Thread::Current()); |
| DCHECK(EventMask::EventIsInRange(event)); |
| GetEventMask(thread).Set(event); |
| if (thread != nullptr) { |
| unioned_thread_event_mask.Set(event, true); |
| } |
| } |
| |
| void EventMasks::DisableEvent(ArtJvmTiEnv* env, art::Thread* thread, ArtJvmtiEvent event) { |
| DCHECK_EQ(&env->event_masks, this); |
| env->event_info_mutex_.AssertExclusiveHeld(art::Thread::Current()); |
| DCHECK(EventMask::EventIsInRange(event)); |
| GetEventMask(thread).Set(event, false); |
| if (thread != nullptr) { |
| // Regenerate union for the event. |
| bool union_value = false; |
| for (auto& pair : thread_event_masks) { |
| union_value |= pair.second.Test(event); |
| if (union_value) { |
| break; |
| } |
| } |
| unioned_thread_event_mask.Set(event, union_value); |
| } |
| } |
| |
| void EventMasks::HandleChangedCapabilities(const jvmtiCapabilities& caps, bool caps_added) { |
| if (UNLIKELY(caps.can_retransform_classes == 1)) { |
| // If we are giving this env the retransform classes cap we need to switch all events of |
| // NonTransformable to Transformable and vice versa. |
| ArtJvmtiEvent to_remove = caps_added ? ArtJvmtiEvent::kClassFileLoadHookNonRetransformable |
| : ArtJvmtiEvent::kClassFileLoadHookRetransformable; |
| ArtJvmtiEvent to_add = caps_added ? ArtJvmtiEvent::kClassFileLoadHookRetransformable |
| : ArtJvmtiEvent::kClassFileLoadHookNonRetransformable; |
| if (global_event_mask.Test(to_remove)) { |
| CHECK(!global_event_mask.Test(to_add)); |
| global_event_mask.Set(to_remove, false); |
| global_event_mask.Set(to_add, true); |
| } |
| |
| if (unioned_thread_event_mask.Test(to_remove)) { |
| CHECK(!unioned_thread_event_mask.Test(to_add)); |
| unioned_thread_event_mask.Set(to_remove, false); |
| unioned_thread_event_mask.Set(to_add, true); |
| } |
| for (auto thread_mask : thread_event_masks) { |
| if (thread_mask.second.Test(to_remove)) { |
| CHECK(!thread_mask.second.Test(to_add)); |
| thread_mask.second.Set(to_remove, false); |
| thread_mask.second.Set(to_add, true); |
| } |
| } |
| } |
| } |
| |
| void EventHandler::RegisterArtJvmTiEnv(ArtJvmTiEnv* env) { |
| art::WriterMutexLock mu(art::Thread::Current(), envs_lock_); |
| envs.push_back(env); |
| } |
| |
| void EventHandler::RemoveArtJvmTiEnv(ArtJvmTiEnv* env) { |
| art::WriterMutexLock mu(art::Thread::Current(), envs_lock_); |
| // Since we might be currently iterating over the envs list we cannot actually erase elements. |
| // Instead we will simply replace them with 'nullptr' and skip them manually. |
| auto it = std::find(envs.begin(), envs.end(), env); |
| if (it != envs.end()) { |
| envs.erase(it); |
| for (size_t i = static_cast<size_t>(ArtJvmtiEvent::kMinEventTypeVal); |
| i <= static_cast<size_t>(ArtJvmtiEvent::kMaxEventTypeVal); |
| ++i) { |
| RecalculateGlobalEventMaskLocked(static_cast<ArtJvmtiEvent>(i)); |
| } |
| } |
| } |
| |
| static bool IsThreadControllable(ArtJvmtiEvent event) { |
| switch (event) { |
| case ArtJvmtiEvent::kVmInit: |
| case ArtJvmtiEvent::kVmStart: |
| case ArtJvmtiEvent::kVmDeath: |
| case ArtJvmtiEvent::kThreadStart: |
| case ArtJvmtiEvent::kCompiledMethodLoad: |
| case ArtJvmtiEvent::kCompiledMethodUnload: |
| case ArtJvmtiEvent::kDynamicCodeGenerated: |
| case ArtJvmtiEvent::kDataDumpRequest: |
| return false; |
| |
| default: |
| return true; |
| } |
| } |
| |
| template<typename Type> |
| static Type AddLocalRef(art::JNIEnvExt* e, art::mirror::Object* obj) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| return (obj == nullptr) ? nullptr : e->AddLocalReference<Type>(obj); |
| } |
| |
| template<ArtJvmtiEvent kEvent, typename ...Args> |
| static void RunEventCallback(EventHandler* handler, |
| art::Thread* self, |
| art::JNIEnvExt* jnienv, |
| Args... args) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| ScopedLocalRef<jthread> thread_jni(jnienv, AddLocalRef<jthread>(jnienv, self->GetPeer())); |
| handler->DispatchEvent<kEvent>(self, |
| static_cast<JNIEnv*>(jnienv), |
| thread_jni.get(), |
| args...); |
| } |
| |
| static void SetupDdmTracking(art::DdmCallback* listener, bool enable) { |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| if (enable) { |
| art::Runtime::Current()->GetRuntimeCallbacks()->AddDdmCallback(listener); |
| } else { |
| art::Runtime::Current()->GetRuntimeCallbacks()->RemoveDdmCallback(listener); |
| } |
| } |
| |
| class JvmtiDdmChunkListener : public art::DdmCallback { |
| public: |
| explicit JvmtiDdmChunkListener(EventHandler* handler) : handler_(handler) {} |
| |
| void DdmPublishChunk(uint32_t type, const art::ArrayRef<const uint8_t>& data) |
| override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kDdmPublishChunk)) { |
| art::Thread* self = art::Thread::Current(); |
| handler_->DispatchEvent<ArtJvmtiEvent::kDdmPublishChunk>( |
| self, |
| static_cast<JNIEnv*>(self->GetJniEnv()), |
| static_cast<jint>(type), |
| static_cast<jint>(data.size()), |
| reinterpret_cast<const jbyte*>(data.data())); |
| } |
| } |
| |
| private: |
| EventHandler* handler_; |
| |
| DISALLOW_COPY_AND_ASSIGN(JvmtiDdmChunkListener); |
| }; |
| |
| class JvmtiAllocationListener : public art::gc::AllocationListener { |
| public: |
| explicit JvmtiAllocationListener(EventHandler* handler) : handler_(handler) {} |
| |
| void ObjectAllocated(art::Thread* self, art::ObjPtr<art::mirror::Object>* obj, size_t byte_count) |
| override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| DCHECK_EQ(self, art::Thread::Current()); |
| |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kVmObjectAlloc)) { |
| art::StackHandleScope<1> hs(self); |
| auto h = hs.NewHandleWrapper(obj); |
| // jvmtiEventVMObjectAlloc parameters: |
| // jvmtiEnv *jvmti_env, |
| // JNIEnv* jni_env, |
| // jthread thread, |
| // jobject object, |
| // jclass object_klass, |
| // jlong size |
| art::JNIEnvExt* jni_env = self->GetJniEnv(); |
| ScopedLocalRef<jobject> object( |
| jni_env, jni_env->AddLocalReference<jobject>(*obj)); |
| ScopedLocalRef<jclass> klass( |
| jni_env, jni_env->AddLocalReference<jclass>(obj->Ptr()->GetClass())); |
| |
| RunEventCallback<ArtJvmtiEvent::kVmObjectAlloc>(handler_, |
| self, |
| jni_env, |
| object.get(), |
| klass.get(), |
| static_cast<jlong>(byte_count)); |
| } |
| } |
| |
| private: |
| EventHandler* handler_; |
| }; |
| |
| static void SetupObjectAllocationTracking(art::gc::AllocationListener* listener, bool enable) { |
| // We must not hold the mutator lock here, but if we're in FastJNI, for example, we might. For |
| // now, do a workaround: (possibly) acquire and release. |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| art::ScopedThreadSuspension sts(soa.Self(), art::ThreadState::kSuspended); |
| if (enable) { |
| art::Runtime::Current()->GetHeap()->SetAllocationListener(listener); |
| } else { |
| art::Runtime::Current()->GetHeap()->RemoveAllocationListener(); |
| } |
| } |
| |
| class JvmtiMonitorListener : public art::MonitorCallback { |
| public: |
| explicit JvmtiMonitorListener(EventHandler* handler) : handler_(handler) {} |
| |
| void MonitorContendedLocking(art::Monitor* m) |
| override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMonitorContendedEnter)) { |
| art::Thread* self = art::Thread::Current(); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| ScopedLocalRef<jobject> mon(jnienv, AddLocalRef<jobject>(jnienv, m->GetObject())); |
| RunEventCallback<ArtJvmtiEvent::kMonitorContendedEnter>( |
| handler_, |
| self, |
| jnienv, |
| mon.get()); |
| } |
| } |
| |
| void MonitorContendedLocked(art::Monitor* m) |
| override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMonitorContendedEntered)) { |
| art::Thread* self = art::Thread::Current(); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| ScopedLocalRef<jobject> mon(jnienv, AddLocalRef<jobject>(jnienv, m->GetObject())); |
| RunEventCallback<ArtJvmtiEvent::kMonitorContendedEntered>( |
| handler_, |
| self, |
| jnienv, |
| mon.get()); |
| } |
| } |
| |
| void ObjectWaitStart(art::Handle<art::mirror::Object> obj, int64_t timeout) |
| override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMonitorWait)) { |
| art::Thread* self = art::Thread::Current(); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| ScopedLocalRef<jobject> mon(jnienv, AddLocalRef<jobject>(jnienv, obj.Get())); |
| RunEventCallback<ArtJvmtiEvent::kMonitorWait>( |
| handler_, |
| self, |
| jnienv, |
| mon.get(), |
| static_cast<jlong>(timeout)); |
| } |
| } |
| |
| |
| // Our interpretation of the spec is that the JVMTI_EVENT_MONITOR_WAITED will be sent immediately |
| // after a thread has woken up from a sleep caused by a call to Object#wait. If the thread will |
| // never go to sleep (due to not having the lock, having bad arguments, or having an exception |
| // propogated from JVMTI_EVENT_MONITOR_WAIT) we will not send this event. |
| // |
| // This does not fully match the RI semantics. Specifically, we will not send the |
| // JVMTI_EVENT_MONITOR_WAITED event in one situation where the RI would, there was an exception in |
| // the JVMTI_EVENT_MONITOR_WAIT event but otherwise the call was fine. In that case the RI would |
| // send this event and return without going to sleep. |
| // |
| // See b/65558434 for more discussion. |
| void MonitorWaitFinished(art::Monitor* m, bool timeout) |
| override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMonitorWaited)) { |
| art::Thread* self = art::Thread::Current(); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| ScopedLocalRef<jobject> mon(jnienv, AddLocalRef<jobject>(jnienv, m->GetObject())); |
| RunEventCallback<ArtJvmtiEvent::kMonitorWaited>( |
| handler_, |
| self, |
| jnienv, |
| mon.get(), |
| static_cast<jboolean>(timeout)); |
| } |
| } |
| |
| private: |
| EventHandler* handler_; |
| }; |
| |
| class JvmtiParkListener : public art::ParkCallback { |
| public: |
| explicit JvmtiParkListener(EventHandler* handler) : handler_(handler) {} |
| |
| void ThreadParkStart(bool is_absolute, int64_t timeout) |
| override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMonitorWait)) { |
| art::Thread* self = art::Thread::Current(); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| art::ArtField* parkBlockerField = art::jni::DecodeArtField( |
| art::WellKnownClasses::java_lang_Thread_parkBlocker); |
| art::ObjPtr<art::mirror::Object> blocker_obj = parkBlockerField->GetObj(self->GetPeer()); |
| if (blocker_obj.IsNull()) { |
| blocker_obj = self->GetPeer(); |
| } |
| int64_t timeout_ms; |
| if (!is_absolute) { |
| if (timeout == 0) { |
| timeout_ms = 0; |
| } else { |
| timeout_ms = timeout / 1000000; |
| if (timeout_ms == 0) { |
| // If we were instructed to park for a nonzero number of nanoseconds, but not enough |
| // to be a full millisecond, round up to 1 ms. A nonzero park() call will return |
| // soon, but a 0 wait or park call will wait indefinitely. |
| timeout_ms = 1; |
| } |
| } |
| } else { |
| struct timeval tv; |
| gettimeofday(&tv, (struct timezone *) nullptr); |
| int64_t now = tv.tv_sec * 1000LL + tv.tv_usec / 1000; |
| if (now < timeout) { |
| timeout_ms = timeout - now; |
| } else { |
| // Waiting for 0 ms is an indefinite wait; parking until a time in |
| // the past or the current time will return immediately, so emulate |
| // the shortest possible wait event. |
| timeout_ms = 1; |
| } |
| } |
| ScopedLocalRef<jobject> blocker(jnienv, AddLocalRef<jobject>(jnienv, blocker_obj.Ptr())); |
| RunEventCallback<ArtJvmtiEvent::kMonitorWait>( |
| handler_, |
| self, |
| jnienv, |
| blocker.get(), |
| static_cast<jlong>(timeout_ms)); |
| } |
| } |
| |
| |
| // Our interpretation of the spec is that the JVMTI_EVENT_MONITOR_WAITED will be sent immediately |
| // after a thread has woken up from a sleep caused by a call to Object#wait. If the thread will |
| // never go to sleep (due to not having the lock, having bad arguments, or having an exception |
| // propogated from JVMTI_EVENT_MONITOR_WAIT) we will not send this event. |
| // |
| // This does not fully match the RI semantics. Specifically, we will not send the |
| // JVMTI_EVENT_MONITOR_WAITED event in one situation where the RI would, there was an exception in |
| // the JVMTI_EVENT_MONITOR_WAIT event but otherwise the call was fine. In that case the RI would |
| // send this event and return without going to sleep. |
| // |
| // See b/65558434 for more discussion. |
| void ThreadParkFinished(bool timeout) override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| if (handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMonitorWaited)) { |
| art::Thread* self = art::Thread::Current(); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| art::ArtField* parkBlockerField = art::jni::DecodeArtField( |
| art::WellKnownClasses::java_lang_Thread_parkBlocker); |
| art::ObjPtr<art::mirror::Object> blocker_obj = parkBlockerField->GetObj(self->GetPeer()); |
| if (blocker_obj.IsNull()) { |
| blocker_obj = self->GetPeer(); |
| } |
| ScopedLocalRef<jobject> blocker(jnienv, AddLocalRef<jobject>(jnienv, blocker_obj.Ptr())); |
| RunEventCallback<ArtJvmtiEvent::kMonitorWaited>( |
| handler_, |
| self, |
| jnienv, |
| blocker.get(), |
| static_cast<jboolean>(timeout)); |
| } |
| } |
| |
| private: |
| EventHandler* handler_; |
| }; |
| |
| static void SetupMonitorListener(art::MonitorCallback* monitor_listener, art::ParkCallback* park_listener, bool enable) { |
| // We must not hold the mutator lock here, but if we're in FastJNI, for example, we might. For |
| // now, do a workaround: (possibly) acquire and release. |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| if (enable) { |
| art::Runtime::Current()->GetRuntimeCallbacks()->AddMonitorCallback(monitor_listener); |
| art::Runtime::Current()->GetRuntimeCallbacks()->AddParkCallback(park_listener); |
| } else { |
| art::Runtime::Current()->GetRuntimeCallbacks()->RemoveMonitorCallback(monitor_listener); |
| art::Runtime::Current()->GetRuntimeCallbacks()->RemoveParkCallback(park_listener); |
| } |
| } |
| |
| // Report GC pauses (see spec) as GARBAGE_COLLECTION_START and GARBAGE_COLLECTION_END. |
| class JvmtiGcPauseListener : public art::gc::GcPauseListener { |
| public: |
| explicit JvmtiGcPauseListener(EventHandler* handler) |
| : handler_(handler), |
| start_enabled_(false), |
| finish_enabled_(false) {} |
| |
| void StartPause() override { |
| handler_->DispatchEvent<ArtJvmtiEvent::kGarbageCollectionStart>(art::Thread::Current()); |
| } |
| |
| void EndPause() override { |
| handler_->DispatchEvent<ArtJvmtiEvent::kGarbageCollectionFinish>(art::Thread::Current()); |
| } |
| |
| bool IsEnabled() { |
| return start_enabled_ || finish_enabled_; |
| } |
| |
| void SetStartEnabled(bool e) { |
| start_enabled_ = e; |
| } |
| |
| void SetFinishEnabled(bool e) { |
| finish_enabled_ = e; |
| } |
| |
| private: |
| EventHandler* handler_; |
| bool start_enabled_; |
| bool finish_enabled_; |
| }; |
| |
| static void SetupGcPauseTracking(JvmtiGcPauseListener* listener, ArtJvmtiEvent event, bool enable) { |
| bool old_state = listener->IsEnabled(); |
| |
| if (event == ArtJvmtiEvent::kGarbageCollectionStart) { |
| listener->SetStartEnabled(enable); |
| } else { |
| listener->SetFinishEnabled(enable); |
| } |
| |
| bool new_state = listener->IsEnabled(); |
| |
| if (old_state != new_state) { |
| if (new_state) { |
| art::Runtime::Current()->GetHeap()->SetGcPauseListener(listener); |
| } else { |
| art::Runtime::Current()->GetHeap()->RemoveGcPauseListener(); |
| } |
| } |
| } |
| |
| class JvmtiMethodTraceListener final : public art::instrumentation::InstrumentationListener { |
| public: |
| explicit JvmtiMethodTraceListener(EventHandler* handler) : event_handler_(handler) {} |
| |
| // Call-back for when a method is entered. |
| void MethodEntered(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED, |
| art::ArtMethod* method, |
| uint32_t dex_pc ATTRIBUTE_UNUSED) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| if (!method->IsRuntimeMethod() && |
| event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMethodEntry)) { |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| RunEventCallback<ArtJvmtiEvent::kMethodEntry>(event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method)); |
| } |
| } |
| |
| // Callback for when a method is exited with a reference return value. |
| void MethodExited(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED, |
| art::ArtMethod* method, |
| uint32_t dex_pc ATTRIBUTE_UNUSED, |
| art::Handle<art::mirror::Object> return_value) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| if (!method->IsRuntimeMethod() && |
| event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMethodExit)) { |
| DCHECK_EQ( |
| method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize)->GetReturnTypePrimitive(), |
| art::Primitive::kPrimNot) << method->PrettyMethod(); |
| DCHECK(!self->IsExceptionPending()); |
| jvalue val; |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| ScopedLocalRef<jobject> return_jobj(jnienv, AddLocalRef<jobject>(jnienv, return_value.Get())); |
| val.l = return_jobj.get(); |
| RunEventCallback<ArtJvmtiEvent::kMethodExit>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| /*was_popped_by_exception=*/ static_cast<jboolean>(JNI_FALSE), |
| val); |
| } |
| } |
| |
| // Call-back for when a method is exited. |
| void MethodExited(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED, |
| art::ArtMethod* method, |
| uint32_t dex_pc ATTRIBUTE_UNUSED, |
| const art::JValue& return_value) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| if (!method->IsRuntimeMethod() && |
| event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMethodExit)) { |
| DCHECK_NE( |
| method->GetInterfaceMethodIfProxy(art::kRuntimePointerSize)->GetReturnTypePrimitive(), |
| art::Primitive::kPrimNot) << method->PrettyMethod(); |
| DCHECK(!self->IsExceptionPending()); |
| jvalue val; |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| // 64bit integer is the largest value in the union so we should be fine simply copying it into |
| // the union. |
| val.j = return_value.GetJ(); |
| RunEventCallback<ArtJvmtiEvent::kMethodExit>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| /*was_popped_by_exception=*/ static_cast<jboolean>(JNI_FALSE), |
| val); |
| } |
| } |
| |
| // Call-back for when a method is popped due to an exception throw. A method will either cause a |
| // MethodExited call-back or a MethodUnwind call-back when its activation is removed. |
| void MethodUnwind(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED, |
| art::ArtMethod* method, |
| uint32_t dex_pc ATTRIBUTE_UNUSED) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| if (!method->IsRuntimeMethod() && |
| event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kMethodExit)) { |
| jvalue val; |
| // Just set this to 0xffffffffffffffff so it's not uninitialized. |
| val.j = static_cast<jlong>(-1); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| art::StackHandleScope<1> hs(self); |
| art::Handle<art::mirror::Throwable> old_exception(hs.NewHandle(self->GetException())); |
| CHECK(!old_exception.IsNull()); |
| self->ClearException(); |
| RunEventCallback<ArtJvmtiEvent::kMethodExit>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| /*was_popped_by_exception=*/ static_cast<jboolean>(JNI_TRUE), |
| val); |
| // Match RI behavior of just throwing away original exception if a new one is thrown. |
| if (LIKELY(!self->IsExceptionPending())) { |
| self->SetException(old_exception.Get()); |
| } |
| } |
| } |
| |
| // Call-back for when the dex pc moves in a method. |
| void DexPcMoved(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object ATTRIBUTE_UNUSED, |
| art::ArtMethod* method, |
| uint32_t new_dex_pc) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| DCHECK(!method->IsRuntimeMethod()); |
| // Default methods might be copied to multiple classes. We need to get the canonical version of |
| // this method so that we can check for breakpoints correctly. |
| // TODO We should maybe do this on other events to ensure that we are consistent WRT default |
| // methods. This could interact with obsolete methods if we ever let interface redefinition |
| // happen though. |
| method = method->GetCanonicalMethod(); |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| jmethodID jmethod = art::jni::EncodeArtMethod(method); |
| jlocation location = static_cast<jlocation>(new_dex_pc); |
| // Step event is reported first according to the spec. |
| if (event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kSingleStep)) { |
| RunEventCallback<ArtJvmtiEvent::kSingleStep>(event_handler_, self, jnienv, jmethod, location); |
| } |
| // Next we do the Breakpoint events. The Dispatch code will filter the individual |
| if (event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kBreakpoint)) { |
| RunEventCallback<ArtJvmtiEvent::kBreakpoint>(event_handler_, self, jnienv, jmethod, location); |
| } |
| } |
| |
| // Call-back for when we read from a field. |
| void FieldRead(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object, |
| art::ArtMethod* method, |
| uint32_t dex_pc, |
| art::ArtField* field) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| if (event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kFieldAccess)) { |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| // DCHECK(!self->IsExceptionPending()); |
| ScopedLocalRef<jobject> this_ref(jnienv, AddLocalRef<jobject>(jnienv, this_object.Get())); |
| ScopedLocalRef<jobject> fklass(jnienv, |
| AddLocalRef<jobject>(jnienv, |
| field->GetDeclaringClass().Ptr())); |
| RunEventCallback<ArtJvmtiEvent::kFieldAccess>(event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| static_cast<jlocation>(dex_pc), |
| static_cast<jclass>(fklass.get()), |
| this_ref.get(), |
| art::jni::EncodeArtField(field)); |
| } |
| } |
| |
| void FieldWritten(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object, |
| art::ArtMethod* method, |
| uint32_t dex_pc, |
| art::ArtField* field, |
| art::Handle<art::mirror::Object> new_val) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| if (event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kFieldModification)) { |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| // DCHECK(!self->IsExceptionPending()); |
| ScopedLocalRef<jobject> this_ref(jnienv, AddLocalRef<jobject>(jnienv, this_object.Get())); |
| ScopedLocalRef<jobject> fklass(jnienv, |
| AddLocalRef<jobject>(jnienv, |
| field->GetDeclaringClass().Ptr())); |
| ScopedLocalRef<jobject> fval(jnienv, AddLocalRef<jobject>(jnienv, new_val.Get())); |
| jvalue val; |
| val.l = fval.get(); |
| RunEventCallback<ArtJvmtiEvent::kFieldModification>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| static_cast<jlocation>(dex_pc), |
| static_cast<jclass>(fklass.get()), |
| field->IsStatic() ? nullptr : this_ref.get(), |
| art::jni::EncodeArtField(field), |
| 'L', // type_char |
| val); |
| } |
| } |
| |
| // Call-back for when we write into a field. |
| void FieldWritten(art::Thread* self, |
| art::Handle<art::mirror::Object> this_object, |
| art::ArtMethod* method, |
| uint32_t dex_pc, |
| art::ArtField* field, |
| const art::JValue& field_value) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| if (event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kFieldModification)) { |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| DCHECK(!self->IsExceptionPending()); |
| ScopedLocalRef<jobject> this_ref(jnienv, AddLocalRef<jobject>(jnienv, this_object.Get())); |
| ScopedLocalRef<jobject> fklass(jnienv, |
| AddLocalRef<jobject>(jnienv, |
| field->GetDeclaringClass().Ptr())); |
| char type_char = art::Primitive::Descriptor(field->GetTypeAsPrimitiveType())[0]; |
| jvalue val; |
| // 64bit integer is the largest value in the union so we should be fine simply copying it into |
| // the union. |
| val.j = field_value.GetJ(); |
| RunEventCallback<ArtJvmtiEvent::kFieldModification>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| static_cast<jlocation>(dex_pc), |
| static_cast<jclass>(fklass.get()), |
| field->IsStatic() ? nullptr : this_ref.get(), // nb static field modification get given |
| // the class as this_object for some |
| // reason. |
| art::jni::EncodeArtField(field), |
| type_char, |
| val); |
| } |
| } |
| |
| void WatchedFramePop(art::Thread* self, const art::ShadowFrame& frame) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| jboolean is_exception_pending = self->IsExceptionPending(); |
| RunEventCallback<ArtJvmtiEvent::kFramePop>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(frame.GetMethod()), |
| is_exception_pending, |
| &frame); |
| } |
| |
| static void FindCatchMethodsFromThrow(art::Thread* self, |
| art::Handle<art::mirror::Throwable> exception, |
| /*out*/ art::ArtMethod** out_method, |
| /*out*/ uint32_t* dex_pc) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| // Finds the location where this exception will most likely be caught. We ignore intervening |
| // native frames (which could catch the exception) and return the closest java frame with a |
| // compatible catch statement. |
| class CatchLocationFinder final : public art::StackVisitor { |
| public: |
| CatchLocationFinder(art::Thread* target, |
| art::Handle<art::mirror::Class> exception_class, |
| art::Context* context, |
| /*out*/ art::ArtMethod** out_catch_method, |
| /*out*/ uint32_t* out_catch_pc) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) |
| : StackVisitor(target, context, art::StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| exception_class_(exception_class), |
| catch_method_ptr_(out_catch_method), |
| catch_dex_pc_ptr_(out_catch_pc) {} |
| |
| bool VisitFrame() override REQUIRES_SHARED(art::Locks::mutator_lock_) { |
| art::ArtMethod* method = GetMethod(); |
| DCHECK(method != nullptr); |
| if (method->IsRuntimeMethod()) { |
| return true; |
| } |
| |
| if (!method->IsNative()) { |
| uint32_t cur_dex_pc = GetDexPc(); |
| if (cur_dex_pc == art::dex::kDexNoIndex) { |
| // This frame looks opaque. Just keep on going. |
| return true; |
| } |
| bool has_no_move_exception = false; |
| uint32_t found_dex_pc = method->FindCatchBlock( |
| exception_class_, cur_dex_pc, &has_no_move_exception); |
| if (found_dex_pc != art::dex::kDexNoIndex) { |
| // We found the catch. Store the result and return. |
| *catch_method_ptr_ = method; |
| *catch_dex_pc_ptr_ = found_dex_pc; |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| private: |
| art::Handle<art::mirror::Class> exception_class_; |
| art::ArtMethod** catch_method_ptr_; |
| uint32_t* catch_dex_pc_ptr_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CatchLocationFinder); |
| }; |
| |
| art::StackHandleScope<1> hs(self); |
| *out_method = nullptr; |
| *dex_pc = 0; |
| std::unique_ptr<art::Context> context(art::Context::Create()); |
| |
| CatchLocationFinder clf(self, |
| hs.NewHandle(exception->GetClass()), |
| context.get(), |
| /*out*/ out_method, |
| /*out*/ dex_pc); |
| clf.WalkStack(/* include_transitions= */ false); |
| } |
| |
| // Call-back when an exception is thrown. |
| void ExceptionThrown(art::Thread* self, art::Handle<art::mirror::Throwable> exception_object) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| DCHECK(self->IsExceptionThrownByCurrentMethod(exception_object.Get())); |
| // The instrumentation events get rid of this for us. |
| DCHECK(!self->IsExceptionPending()); |
| if (event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kException)) { |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| art::ArtMethod* catch_method; |
| uint32_t catch_pc; |
| FindCatchMethodsFromThrow(self, exception_object, &catch_method, &catch_pc); |
| uint32_t dex_pc = 0; |
| art::ArtMethod* method = self->GetCurrentMethod(&dex_pc, |
| /* check_suspended= */ true, |
| /* abort_on_error= */ art::kIsDebugBuild); |
| ScopedLocalRef<jobject> exception(jnienv, |
| AddLocalRef<jobject>(jnienv, exception_object.Get())); |
| RunEventCallback<ArtJvmtiEvent::kException>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| static_cast<jlocation>(dex_pc), |
| exception.get(), |
| art::jni::EncodeArtMethod(catch_method), |
| static_cast<jlocation>(catch_pc)); |
| } |
| return; |
| } |
| |
| // Call-back when an exception is handled. |
| void ExceptionHandled(art::Thread* self, art::Handle<art::mirror::Throwable> exception_object) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| // Since the exception has already been handled there shouldn't be one pending. |
| DCHECK(!self->IsExceptionPending()); |
| if (event_handler_->IsEventEnabledAnywhere(ArtJvmtiEvent::kExceptionCatch)) { |
| art::JNIEnvExt* jnienv = self->GetJniEnv(); |
| uint32_t dex_pc; |
| art::ArtMethod* method = self->GetCurrentMethod(&dex_pc, |
| /* check_suspended= */ true, |
| /* abort_on_error= */ art::kIsDebugBuild); |
| ScopedLocalRef<jobject> exception(jnienv, |
| AddLocalRef<jobject>(jnienv, exception_object.Get())); |
| RunEventCallback<ArtJvmtiEvent::kExceptionCatch>( |
| event_handler_, |
| self, |
| jnienv, |
| art::jni::EncodeArtMethod(method), |
| static_cast<jlocation>(dex_pc), |
| exception.get()); |
| } |
| return; |
| } |
| |
| // Call-back for when we execute a branch. |
| void Branch(art::Thread* self ATTRIBUTE_UNUSED, |
| art::ArtMethod* method ATTRIBUTE_UNUSED, |
| uint32_t dex_pc ATTRIBUTE_UNUSED, |
| int32_t dex_pc_offset ATTRIBUTE_UNUSED) |
| REQUIRES_SHARED(art::Locks::mutator_lock_) override { |
| return; |
| } |
| |
| private: |
| EventHandler* const event_handler_; |
| }; |
| |
| static uint32_t GetInstrumentationEventsFor(ArtJvmtiEvent event) { |
| switch (event) { |
| case ArtJvmtiEvent::kMethodEntry: |
| return art::instrumentation::Instrumentation::kMethodEntered; |
| case ArtJvmtiEvent::kMethodExit: |
| return art::instrumentation::Instrumentation::kMethodExited | |
| art::instrumentation::Instrumentation::kMethodUnwind; |
| case ArtJvmtiEvent::kFieldModification: |
| return art::instrumentation::Instrumentation::kFieldWritten; |
| case ArtJvmtiEvent::kFieldAccess: |
| return art::instrumentation::Instrumentation::kFieldRead; |
| case ArtJvmtiEvent::kBreakpoint: |
| case ArtJvmtiEvent::kSingleStep: |
| return art::instrumentation::Instrumentation::kDexPcMoved; |
| case ArtJvmtiEvent::kFramePop: |
| return art::instrumentation::Instrumentation::kWatchedFramePop; |
| case ArtJvmtiEvent::kException: |
| return art::instrumentation::Instrumentation::kExceptionThrown; |
| case ArtJvmtiEvent::kExceptionCatch: |
| return art::instrumentation::Instrumentation::kExceptionHandled; |
| default: |
| LOG(FATAL) << "Unknown event "; |
| UNREACHABLE(); |
| } |
| } |
| |
| static bool EventNeedsFullDeopt(ArtJvmtiEvent event) { |
| switch (event) { |
| case ArtJvmtiEvent::kBreakpoint: |
| case ArtJvmtiEvent::kException: |
| return false; |
| // TODO We should support more of these or at least do something to make them discriminate by |
| // thread. |
| case ArtJvmtiEvent::kMethodEntry: |
| case ArtJvmtiEvent::kExceptionCatch: |
| case ArtJvmtiEvent::kMethodExit: |
| case ArtJvmtiEvent::kFieldModification: |
| case ArtJvmtiEvent::kFieldAccess: |
| case ArtJvmtiEvent::kSingleStep: |
| case ArtJvmtiEvent::kFramePop: |
| return true; |
| default: |
| LOG(FATAL) << "Unexpected event type!"; |
| UNREACHABLE(); |
| } |
| } |
| |
| void EventHandler::SetupTraceListener(JvmtiMethodTraceListener* listener, |
| ArtJvmtiEvent event, |
| bool enable) { |
| bool needs_full_deopt = EventNeedsFullDeopt(event); |
| // Make sure we can deopt. |
| { |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| DeoptManager* deopt_manager = DeoptManager::Get(); |
| if (enable) { |
| deopt_manager->AddDeoptimizationRequester(); |
| if (needs_full_deopt) { |
| deopt_manager->AddDeoptimizeAllMethods(); |
| } |
| } else { |
| if (needs_full_deopt) { |
| deopt_manager->RemoveDeoptimizeAllMethods(); |
| } |
| deopt_manager->RemoveDeoptimizationRequester(); |
| } |
| } |
| |
| // Add the actual listeners. |
| uint32_t new_events = GetInstrumentationEventsFor(event); |
| if (new_events == art::instrumentation::Instrumentation::kDexPcMoved) { |
| // Need to skip adding the listeners if the event is breakpoint/single-step since those events |
| // share the same art-instrumentation underlying event. We need to give them their own deopt |
| // request though so the test waits until here. |
| DCHECK(event == ArtJvmtiEvent::kBreakpoint || event == ArtJvmtiEvent::kSingleStep); |
| ArtJvmtiEvent other = event == ArtJvmtiEvent::kBreakpoint ? ArtJvmtiEvent::kSingleStep |
| : ArtJvmtiEvent::kBreakpoint; |
| if (IsEventEnabledAnywhere(other)) { |
| // The event needs to be kept around/is already enabled by the other jvmti event that uses the |
| // same instrumentation event. |
| return; |
| } |
| } |
| art::ScopedThreadStateChange stsc(art::Thread::Current(), art::ThreadState::kNative); |
| art::instrumentation::Instrumentation* instr = art::Runtime::Current()->GetInstrumentation(); |
| art::ScopedSuspendAll ssa("jvmti method tracing installation"); |
| if (enable) { |
| instr->AddListener(listener, new_events); |
| } else { |
| instr->RemoveListener(listener, new_events); |
| } |
| } |
| |
| // Makes sure that all compiled methods are AsyncDeoptimizable so we can deoptimize (and force to |
| // the switch interpreter) when we try to get or set a local variable. |
| void EventHandler::HandleLocalAccessCapabilityAdded() { |
| class UpdateEntryPointsClassVisitor : public art::ClassVisitor { |
| public: |
| explicit UpdateEntryPointsClassVisitor(art::Runtime* runtime) |
| : runtime_(runtime) {} |
| |
| bool operator()(art::ObjPtr<art::mirror::Class> klass) |
| override REQUIRES(art::Locks::mutator_lock_) { |
| if (!klass->IsLoaded()) { |
| // Skip classes that aren't loaded since they might not have fully allocated and initialized |
| // their methods. Furthemore since the jvmti-plugin must have been loaded by this point |
| // these methods will definitately be using debuggable code. |
| return true; |
| } |
| for (auto& m : klass->GetMethods(art::kRuntimePointerSize)) { |
| const void* code = m.GetEntryPointFromQuickCompiledCode(); |
| if (m.IsNative() || m.IsProxyMethod()) { |
| continue; |
| } else if (!runtime_->GetClassLinker()->IsQuickToInterpreterBridge(code) && |
| !runtime_->IsAsyncDeoptimizeable(reinterpret_cast<uintptr_t>(code))) { |
| runtime_->GetInstrumentation()->UpdateMethodsCodeToInterpreterEntryPoint(&m); |
| } |
| } |
| return true; |
| } |
| |
| private: |
| art::Runtime* runtime_; |
| }; |
| art::ScopedObjectAccess soa(art::Thread::Current()); |
| UpdateEntryPointsClassVisitor visitor(art::Runtime::Current()); |
| art::Runtime::Current()->GetClassLinker()->VisitClasses(&visitor); |
| } |
| |
| bool EventHandler::OtherMonitorEventsEnabledAnywhere(ArtJvmtiEvent event) { |
| std::array<ArtJvmtiEvent, 4> events { |
| { |
| ArtJvmtiEvent::kMonitorContendedEnter, |
| ArtJvmtiEvent::kMonitorContendedEntered, |
| ArtJvmtiEvent::kMonitorWait, |
| ArtJvmtiEvent::kMonitorWaited |
| } |
| }; |
| for (ArtJvmtiEvent e : events) { |
| if (e != event && IsEventEnabledAnywhere(e)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void EventHandler::SetupFramePopTraceListener(bool enable) { |
| if (enable) { |
| frame_pop_enabled = true; |
| SetupTraceListener(method_trace_listener_.get(), ArtJvmtiEvent::kFramePop, enable); |
| } else { |
| // remove the listener if we have no outstanding frames. |
| { |
| art::ReaderMutexLock mu(art::Thread::Current(), envs_lock_); |
| for (ArtJvmTiEnv* env : envs) { |
| art::ReaderMutexLock event_mu(art::Thread::Current(), env->event_info_mutex_); |
| if (!env->notify_frames.empty()) { |
| // Leaving FramePop listener since there are unsent FramePop events. |
| return; |
| } |
| } |
| frame_pop_enabled = false; |
| } |
| SetupTraceListener(method_trace_listener_.get(), ArtJvmtiEvent::kFramePop, enable); |
| } |
| } |
| |
| // Handle special work for the given event type, if necessary. |
| void EventHandler::HandleEventType(ArtJvmtiEvent event, bool enable) { |
| switch (event) { |
| case ArtJvmtiEvent::kDdmPublishChunk: |
| SetupDdmTracking(ddm_listener_.get(), enable); |
| return; |
| case ArtJvmtiEvent::kVmObjectAlloc: |
| SetupObjectAllocationTracking(alloc_listener_.get(), enable); |
| return; |
| |
| case ArtJvmtiEvent::kGarbageCollectionStart: |
| case ArtJvmtiEvent::kGarbageCollectionFinish: |
| SetupGcPauseTracking(gc_pause_listener_.get(), event, enable); |
| return; |
| // FramePop can never be disabled once it's been turned on if it was turned off with outstanding |
| // pop-events since we would either need to deal with dangling pointers or have missed events. |
| case ArtJvmtiEvent::kFramePop: |
| if (enable && frame_pop_enabled) { |
| // The frame-pop event was held on by pending events so we don't need to do anything. |
| break; |
| } else { |
| SetupFramePopTraceListener(enable); |
| break; |
| } |
| case ArtJvmtiEvent::kMethodEntry: |
| case ArtJvmtiEvent::kMethodExit: |
| case ArtJvmtiEvent::kFieldAccess: |
| case ArtJvmtiEvent::kFieldModification: |
| case ArtJvmtiEvent::kException: |
| case ArtJvmtiEvent::kExceptionCatch: |
| case ArtJvmtiEvent::kBreakpoint: |
| case ArtJvmtiEvent::kSingleStep: |
| SetupTraceListener(method_trace_listener_.get(), event, enable); |
| return; |
| case ArtJvmtiEvent::kMonitorContendedEnter: |
| case ArtJvmtiEvent::kMonitorContendedEntered: |
| case ArtJvmtiEvent::kMonitorWait: |
| case ArtJvmtiEvent::kMonitorWaited: |
| if (!OtherMonitorEventsEnabledAnywhere(event)) { |
| SetupMonitorListener(monitor_listener_.get(), park_listener_.get(), enable); |
| } |
| return; |
| default: |
| break; |
| } |
| } |
| |
| // Checks to see if the env has the capabilities associated with the given event. |
| static bool HasAssociatedCapability(ArtJvmTiEnv* env, |
| ArtJvmtiEvent event) { |
| jvmtiCapabilities caps = env->capabilities; |
| switch (event) { |
| case ArtJvmtiEvent::kBreakpoint: |
| return caps.can_generate_breakpoint_events == 1; |
| |
| case ArtJvmtiEvent::kCompiledMethodLoad: |
| case ArtJvmtiEvent::kCompiledMethodUnload: |
| return caps.can_generate_compiled_method_load_events == 1; |
| |
| case ArtJvmtiEvent::kException: |
| case ArtJvmtiEvent::kExceptionCatch: |
| return caps.can_generate_exception_events == 1; |
| |
| case ArtJvmtiEvent::kFieldAccess: |
| return caps.can_generate_field_access_events == 1; |
| |
| case ArtJvmtiEvent::kFieldModification: |
| return caps.can_generate_field_modification_events == 1; |
| |
| case ArtJvmtiEvent::kFramePop: |
| return caps.can_generate_frame_pop_events == 1; |
| |
| case ArtJvmtiEvent::kGarbageCollectionStart: |
| case ArtJvmtiEvent::kGarbageCollectionFinish: |
| return caps.can_generate_garbage_collection_events == 1; |
| |
| case ArtJvmtiEvent::kMethodEntry: |
| return caps.can_generate_method_entry_events == 1; |
| |
| case ArtJvmtiEvent::kMethodExit: |
| return caps.can_generate_method_exit_events == 1; |
| |
| case ArtJvmtiEvent::kMonitorContendedEnter: |
| case ArtJvmtiEvent::kMonitorContendedEntered: |
| case ArtJvmtiEvent::kMonitorWait: |
| case ArtJvmtiEvent::kMonitorWaited: |
| return caps.can_generate_monitor_events == 1; |
| |
| case ArtJvmtiEvent::kNativeMethodBind: |
| return caps.can_generate_native_method_bind_events == 1; |
| |
| case ArtJvmtiEvent::kObjectFree: |
| return caps.can_generate_object_free_events == 1; |
| |
| case ArtJvmtiEvent::kSingleStep: |
| return caps.can_generate_single_step_events == 1; |
| |
| case ArtJvmtiEvent::kVmObjectAlloc: |
| return caps.can_generate_vm_object_alloc_events == 1; |
| |
| default: |
| return true; |
| } |
| } |
| |
| jvmtiError EventHandler::SetEvent(ArtJvmTiEnv* env, |
| art::Thread* thread, |
| ArtJvmtiEvent event, |
| jvmtiEventMode mode) { |
| if (thread != nullptr) { |
| art::ThreadState state = thread->GetState(); |
| if (state == art::ThreadState::kStarting || |
| state == art::ThreadState::kTerminated || |
| thread->IsStillStarting()) { |
| return ERR(THREAD_NOT_ALIVE); |
| } |
| if (!IsThreadControllable(event)) { |
| return ERR(ILLEGAL_ARGUMENT); |
| } |
| } |
| |
| if (mode != JVMTI_ENABLE && mode != JVMTI_DISABLE) { |
| return ERR(ILLEGAL_ARGUMENT); |
| } |
| |
| if (!EventMask::EventIsInRange(event)) { |
| return ERR(INVALID_EVENT_TYPE); |
| } |
| |
| if (!HasAssociatedCapability(env, event)) { |
| return ERR(MUST_POSSESS_CAPABILITY); |
| } |
| |
| bool old_state; |
| bool new_state; |
| |
| { |
| // Change the event masks atomically. |
| art::Thread* self = art::Thread::Current(); |
| art::WriterMutexLock mu(self, envs_lock_); |
| art::WriterMutexLock mu_env_info(self, env->event_info_mutex_); |
| old_state = global_mask.Test(event); |
| if (mode == JVMTI_ENABLE) { |
| env->event_masks.EnableEvent(env, thread, event); |
| global_mask.Set(event); |
| new_state = true; |
| } else { |
| DCHECK_EQ(mode, JVMTI_DISABLE); |
| |
| env->event_masks.DisableEvent(env, thread, event); |
| RecalculateGlobalEventMaskLocked(event); |
| new_state = global_mask.Test(event); |
| } |
| } |
| |
| // Handle any special work required for the event type. |
| if (new_state != old_state) { |
| HandleEventType(event, mode == JVMTI_ENABLE); |
| } |
| |
| return ERR(NONE); |
| } |
| |
| void EventHandler::HandleBreakpointEventsChanged(bool added) { |
| if (added) { |
| DeoptManager::Get()->AddDeoptimizationRequester(); |
| } else { |
| DeoptManager::Get()->RemoveDeoptimizationRequester(); |
| } |
| } |
| |
| void EventHandler::Shutdown() { |
| // Need to remove the method_trace_listener_ if it's there. |
| art::Thread* self = art::Thread::Current(); |
| art::gc::ScopedGCCriticalSection gcs(self, |
| art::gc::kGcCauseInstrumentation, |
| art::gc::kCollectorTypeInstrumentation); |
| art::ScopedSuspendAll ssa("jvmti method tracing uninstallation"); |
| // Just remove every possible event. |
| art::Runtime::Current()->GetInstrumentation()->RemoveListener(method_trace_listener_.get(), ~0); |
| } |
| |
| EventHandler::EventHandler() |
| : envs_lock_("JVMTI Environment List Lock", art::LockLevel::kTopLockLevel), |
| frame_pop_enabled(false) { |
| alloc_listener_.reset(new JvmtiAllocationListener(this)); |
| ddm_listener_.reset(new JvmtiDdmChunkListener(this)); |
| gc_pause_listener_.reset(new JvmtiGcPauseListener(this)); |
| method_trace_listener_.reset(new JvmtiMethodTraceListener(this)); |
| monitor_listener_.reset(new JvmtiMonitorListener(this)); |
| park_listener_.reset(new JvmtiParkListener(this)); |
| } |
| |
| EventHandler::~EventHandler() { |
| } |
| |
| } // namespace openjdkjvmti |