runtime/runtime_callbacks.cc - platform/art - Gitiles

 /*
  * Copyright (C) 2017 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "runtime_callbacks.h"

 #include <algorithm>

 #include "art_method.h"
 #include "base/macros.h"
 #include "base/mutex-inl.h"
 #include "class_linker.h"
 #include "monitor.h"
 #include "thread-current-inl.h"

 namespace art {

 RuntimeCallbacks::RuntimeCallbacks()
     : callback_lock_(new ReaderWriterMutex("Runtime callbacks lock",
                                            LockLevel::kGenericBottomLock)) {}

 // We don't want to be holding any locks when the actual event is called so we use this to define a
 // helper that gets a copy of the current event list and returns it.
 #define COPY(T)                                                   \
   ([this]() -> decltype(this->T) {                                \
     ReaderMutexLock mu(Thread::Current(), *this->callback_lock_); \
     return std::vector<decltype(this->T)::value_type>(this->T);   \
   })()

 template <typename T>
 ALWAYS_INLINE
 static inline void Remove(T* cb, std::vector<T*>* data) {
   auto it = std::find(data->begin(), data->end(), cb);
   if (it != data->end()) {
     data->erase(it);
   }
 }

 void RuntimeCallbacks::AddDdmCallback(DdmCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   ddm_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveDdmCallback(DdmCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &ddm_callbacks_);
 }

 void RuntimeCallbacks::DdmPublishChunk(uint32_t type, const ArrayRef<const uint8_t>& data) {
   for (DdmCallback* cb : COPY(ddm_callbacks_)) {
     cb->DdmPublishChunk(type, data);
   }
 }

 void RuntimeCallbacks::AddDebuggerControlCallback(DebuggerControlCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   debugger_control_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveDebuggerControlCallback(DebuggerControlCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &debugger_control_callbacks_);
 }

 bool RuntimeCallbacks::IsDebuggerConfigured() {
   for (DebuggerControlCallback* cb : COPY(debugger_control_callbacks_)) {
     if (cb->IsDebuggerConfigured()) {
       return true;
     }
   }
   return false;
 }

 void RuntimeCallbacks::StartDebugger() {
   for (DebuggerControlCallback* cb : COPY(debugger_control_callbacks_)) {
     cb->StartDebugger();
   }
 }

 void RuntimeCallbacks::StopDebugger() {
   for (DebuggerControlCallback* cb : COPY(debugger_control_callbacks_)) {
     cb->StopDebugger();
   }
 }

 void RuntimeCallbacks::AddMethodInspectionCallback(MethodInspectionCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   method_inspection_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveMethodInspectionCallback(MethodInspectionCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &method_inspection_callbacks_);
 }

 bool RuntimeCallbacks::IsMethodSafeToJit(ArtMethod* m) {
   for (MethodInspectionCallback* cb : COPY(method_inspection_callbacks_)) {
     if (!cb->IsMethodSafeToJit(m)) {
       DCHECK(cb->IsMethodBeingInspected(m))
           << "Contract requires that !IsMethodSafeToJit(m) -> IsMethodBeingInspected(m)";
       return false;
     }
   }
   return true;
 }

 bool RuntimeCallbacks::IsMethodBeingInspected(ArtMethod* m) {
   for (MethodInspectionCallback* cb : COPY(method_inspection_callbacks_)) {
     if (cb->IsMethodBeingInspected(m)) {
       return true;
     }
   }
   return false;
 }

 bool RuntimeCallbacks::MethodNeedsDebugVersion(ArtMethod* m) {
   for (MethodInspectionCallback* cb : COPY(method_inspection_callbacks_)) {
     if (cb->MethodNeedsDebugVersion(m)) {
       return true;
     }
   }
   return false;
 }

 void RuntimeCallbacks::AddThreadLifecycleCallback(ThreadLifecycleCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   thread_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::MonitorContendedLocking(Monitor* m) {
   for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
     cb->MonitorContendedLocking(m);
   }
 }

 void RuntimeCallbacks::MonitorContendedLocked(Monitor* m) {
   for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
     cb->MonitorContendedLocked(m);
   }
 }

 void RuntimeCallbacks::ObjectWaitStart(Handle<mirror::Object> m, int64_t timeout) {
   for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
     cb->ObjectWaitStart(m, timeout);
   }
 }

 void RuntimeCallbacks::MonitorWaitFinished(Monitor* m, bool timeout) {
   for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
     cb->MonitorWaitFinished(m, timeout);
   }
 }

 void RuntimeCallbacks::AddMonitorCallback(MonitorCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   monitor_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveMonitorCallback(MonitorCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &monitor_callbacks_);
 }

 void RuntimeCallbacks::ThreadParkStart(bool is_absolute, int64_t timeout) {
   for (ParkCallback * cb : COPY(park_callbacks_)) {
     cb->ThreadParkStart(is_absolute, timeout);
   }
 }

 void RuntimeCallbacks::ThreadParkFinished(bool timeout) {
   for (ParkCallback * cb : COPY(park_callbacks_)) {
     cb->ThreadParkFinished(timeout);
   }
 }

 void RuntimeCallbacks::AddParkCallback(ParkCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   park_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveParkCallback(ParkCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &park_callbacks_);
 }

 void RuntimeCallbacks::RemoveThreadLifecycleCallback(ThreadLifecycleCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &thread_callbacks_);
 }

 void RuntimeCallbacks::ThreadStart(Thread* self) {
   for (ThreadLifecycleCallback* cb : COPY(thread_callbacks_)) {
     cb->ThreadStart(self);
   }
 }

 void RuntimeCallbacks::ThreadDeath(Thread* self) {
   for (ThreadLifecycleCallback* cb : COPY(thread_callbacks_)) {
     cb->ThreadDeath(self);
   }
 }

 void RuntimeCallbacks::AddClassLoadCallback(ClassLoadCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   class_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveClassLoadCallback(ClassLoadCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &class_callbacks_);
 }

 void RuntimeCallbacks::ClassLoad(Handle<mirror::Class> klass) {
   for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
     cb->ClassLoad(klass);
   }
 }

 void RuntimeCallbacks::ClassPreDefine(const char* descriptor,
                                       Handle<mirror::Class> temp_class,
                                       Handle<mirror::ClassLoader> loader,
                                       const DexFile& initial_dex_file,
                                       const dex::ClassDef& initial_class_def,
                                       /*out*/DexFile const** final_dex_file,
                                       /*out*/dex::ClassDef const** final_class_def) {
   DexFile const* current_dex_file = &initial_dex_file;
   dex::ClassDef const* current_class_def = &initial_class_def;
   for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
     DexFile const* new_dex_file = nullptr;
     dex::ClassDef const* new_class_def = nullptr;
     cb->ClassPreDefine(descriptor,
                        temp_class,
                        loader,
                        *current_dex_file,
                        *current_class_def,
                        &new_dex_file,
                        &new_class_def);
     if ((new_dex_file != nullptr && new_dex_file != current_dex_file) ||
         (new_class_def != nullptr && new_class_def != current_class_def)) {
       DCHECK(new_dex_file != nullptr && new_class_def != nullptr);
       current_dex_file = new_dex_file;
       current_class_def = new_class_def;
     }
   }
   *final_dex_file = current_dex_file;
   *final_class_def = current_class_def;
 }

 void RuntimeCallbacks::ClassPrepare(Handle<mirror::Class> temp_klass, Handle<mirror::Class> klass) {
   for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
     cb->ClassPrepare(temp_klass, klass);
   }
 }

 void RuntimeCallbacks::AddRuntimeSigQuitCallback(RuntimeSigQuitCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   sigquit_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveRuntimeSigQuitCallback(RuntimeSigQuitCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &sigquit_callbacks_);
 }

 void RuntimeCallbacks::SigQuit() {
   for (RuntimeSigQuitCallback* cb : COPY(sigquit_callbacks_)) {
     cb->SigQuit();
   }
 }

 void RuntimeCallbacks::AddRuntimePhaseCallback(RuntimePhaseCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   phase_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveRuntimePhaseCallback(RuntimePhaseCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &phase_callbacks_);
 }

 void RuntimeCallbacks::NextRuntimePhase(RuntimePhaseCallback::RuntimePhase phase) {
   for (RuntimePhaseCallback* cb : COPY(phase_callbacks_)) {
     cb->NextRuntimePhase(phase);
   }
 }

 void RuntimeCallbacks::AddMethodCallback(MethodCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   method_callbacks_.push_back(cb);
 }

 void RuntimeCallbacks::RemoveMethodCallback(MethodCallback* cb) {
   WriterMutexLock mu(Thread::Current(), *callback_lock_);
   Remove(cb, &method_callbacks_);
 }

 void RuntimeCallbacks::RegisterNativeMethod(ArtMethod* method,
                                             const void* in_cur_method,
                                             /*out*/void** new_method) {
   void* cur_method = const_cast<void*>(in_cur_method);
   *new_method = cur_method;
   for (MethodCallback* cb : COPY(method_callbacks_)) {
     cb->RegisterNativeMethod(method, cur_method, new_method);
     if (*new_method != nullptr) {
       cur_method = *new_method;
     }
   }
 }

 }  // namespace art
	/*
	* Copyright (C) 2017 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "runtime_callbacks.h"

	#include <algorithm>

	#include "art_method.h"
	#include "base/macros.h"
	#include "base/mutex-inl.h"
	#include "class_linker.h"
	#include "monitor.h"
	#include "thread-current-inl.h"

	namespace art {

	RuntimeCallbacks::RuntimeCallbacks()
	: callback_lock_(new ReaderWriterMutex("Runtime callbacks lock",
	LockLevel::kGenericBottomLock)) {}

	// We don't want to be holding any locks when the actual event is called so we use this to define a
	// helper that gets a copy of the current event list and returns it.
	#define COPY(T) \
	([this]() -> decltype(this->T) { \
	ReaderMutexLock mu(Thread::Current(), *this->callback_lock_); \
	return std::vector<decltype(this->T)::value_type>(this->T); \
	})()

	template <typename T>
	ALWAYS_INLINE
	static inline void Remove(T* cb, std::vector<T> data) {
	auto it = std::find(data->begin(), data->end(), cb);
	if (it != data->end()) {
	data->erase(it);
	}
	}

	void RuntimeCallbacks::AddDdmCallback(DdmCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	ddm_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveDdmCallback(DdmCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &ddm_callbacks_);
	}

	void RuntimeCallbacks::DdmPublishChunk(uint32_t type, const ArrayRef<const uint8_t>& data) {
	for (DdmCallback* cb : COPY(ddm_callbacks_)) {
	cb->DdmPublishChunk(type, data);
	}
	}

	void RuntimeCallbacks::AddDebuggerControlCallback(DebuggerControlCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	debugger_control_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveDebuggerControlCallback(DebuggerControlCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &debugger_control_callbacks_);
	}

	bool RuntimeCallbacks::IsDebuggerConfigured() {
	for (DebuggerControlCallback* cb : COPY(debugger_control_callbacks_)) {
	if (cb->IsDebuggerConfigured()) {
	return true;
	}
	}
	return false;
	}

	void RuntimeCallbacks::StartDebugger() {
	for (DebuggerControlCallback* cb : COPY(debugger_control_callbacks_)) {
	cb->StartDebugger();
	}
	}

	void RuntimeCallbacks::StopDebugger() {
	for (DebuggerControlCallback* cb : COPY(debugger_control_callbacks_)) {
	cb->StopDebugger();
	}
	}

	void RuntimeCallbacks::AddMethodInspectionCallback(MethodInspectionCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	method_inspection_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveMethodInspectionCallback(MethodInspectionCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &method_inspection_callbacks_);
	}

	bool RuntimeCallbacks::IsMethodSafeToJit(ArtMethod* m) {
	for (MethodInspectionCallback* cb : COPY(method_inspection_callbacks_)) {
	if (!cb->IsMethodSafeToJit(m)) {
	DCHECK(cb->IsMethodBeingInspected(m))
	<< "Contract requires that !IsMethodSafeToJit(m) -> IsMethodBeingInspected(m)";
	return false;
	}
	}
	return true;
	}

	bool RuntimeCallbacks::IsMethodBeingInspected(ArtMethod* m) {
	for (MethodInspectionCallback* cb : COPY(method_inspection_callbacks_)) {
	if (cb->IsMethodBeingInspected(m)) {
	return true;
	}
	}
	return false;
	}

	bool RuntimeCallbacks::MethodNeedsDebugVersion(ArtMethod* m) {
	for (MethodInspectionCallback* cb : COPY(method_inspection_callbacks_)) {
	if (cb->MethodNeedsDebugVersion(m)) {
	return true;
	}
	}
	return false;
	}

	void RuntimeCallbacks::AddThreadLifecycleCallback(ThreadLifecycleCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	thread_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::MonitorContendedLocking(Monitor* m) {
	for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
	cb->MonitorContendedLocking(m);
	}
	}

	void RuntimeCallbacks::MonitorContendedLocked(Monitor* m) {
	for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
	cb->MonitorContendedLocked(m);
	}
	}

	void RuntimeCallbacks::ObjectWaitStart(Handle<mirror::Object> m, int64_t timeout) {
	for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
	cb->ObjectWaitStart(m, timeout);
	}
	}

	void RuntimeCallbacks::MonitorWaitFinished(Monitor* m, bool timeout) {
	for (MonitorCallback* cb : COPY(monitor_callbacks_)) {
	cb->MonitorWaitFinished(m, timeout);
	}
	}

	void RuntimeCallbacks::AddMonitorCallback(MonitorCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	monitor_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveMonitorCallback(MonitorCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &monitor_callbacks_);
	}

	void RuntimeCallbacks::ThreadParkStart(bool is_absolute, int64_t timeout) {
	for (ParkCallback * cb : COPY(park_callbacks_)) {
	cb->ThreadParkStart(is_absolute, timeout);
	}
	}

	void RuntimeCallbacks::ThreadParkFinished(bool timeout) {
	for (ParkCallback * cb : COPY(park_callbacks_)) {
	cb->ThreadParkFinished(timeout);
	}
	}

	void RuntimeCallbacks::AddParkCallback(ParkCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	park_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveParkCallback(ParkCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &park_callbacks_);
	}

	void RuntimeCallbacks::RemoveThreadLifecycleCallback(ThreadLifecycleCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &thread_callbacks_);
	}

	void RuntimeCallbacks::ThreadStart(Thread* self) {
	for (ThreadLifecycleCallback* cb : COPY(thread_callbacks_)) {
	cb->ThreadStart(self);
	}
	}

	void RuntimeCallbacks::ThreadDeath(Thread* self) {
	for (ThreadLifecycleCallback* cb : COPY(thread_callbacks_)) {
	cb->ThreadDeath(self);
	}
	}

	void RuntimeCallbacks::AddClassLoadCallback(ClassLoadCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	class_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveClassLoadCallback(ClassLoadCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &class_callbacks_);
	}

	void RuntimeCallbacks::ClassLoad(Handle<mirror::Class> klass) {
	for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
	cb->ClassLoad(klass);
	}
	}

	void RuntimeCallbacks::ClassPreDefine(const char* descriptor,
	Handle<mirror::Class> temp_class,
	Handle<mirror::ClassLoader> loader,
	const DexFile& initial_dex_file,
	const dex::ClassDef& initial_class_def,
	/out/DexFile const** final_dex_file,
	/out/dex::ClassDef const** final_class_def) {
	DexFile const* current_dex_file = &initial_dex_file;
	dex::ClassDef const* current_class_def = &initial_class_def;
	for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
	DexFile const* new_dex_file = nullptr;
	dex::ClassDef const* new_class_def = nullptr;
	cb->ClassPreDefine(descriptor,
	temp_class,
	loader,
	*current_dex_file,
	*current_class_def,
	&new_dex_file,
	&new_class_def);
	if ((new_dex_file != nullptr && new_dex_file != current_dex_file) \|\|
	(new_class_def != nullptr && new_class_def != current_class_def)) {
	DCHECK(new_dex_file != nullptr && new_class_def != nullptr);
	current_dex_file = new_dex_file;
	current_class_def = new_class_def;
	}
	}
	*final_dex_file = current_dex_file;
	*final_class_def = current_class_def;
	}

	void RuntimeCallbacks::ClassPrepare(Handle<mirror::Class> temp_klass, Handle<mirror::Class> klass) {
	for (ClassLoadCallback* cb : COPY(class_callbacks_)) {
	cb->ClassPrepare(temp_klass, klass);
	}
	}

	void RuntimeCallbacks::AddRuntimeSigQuitCallback(RuntimeSigQuitCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	sigquit_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveRuntimeSigQuitCallback(RuntimeSigQuitCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &sigquit_callbacks_);
	}

	void RuntimeCallbacks::SigQuit() {
	for (RuntimeSigQuitCallback* cb : COPY(sigquit_callbacks_)) {
	cb->SigQuit();
	}
	}

	void RuntimeCallbacks::AddRuntimePhaseCallback(RuntimePhaseCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	phase_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveRuntimePhaseCallback(RuntimePhaseCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &phase_callbacks_);
	}

	void RuntimeCallbacks::NextRuntimePhase(RuntimePhaseCallback::RuntimePhase phase) {
	for (RuntimePhaseCallback* cb : COPY(phase_callbacks_)) {
	cb->NextRuntimePhase(phase);
	}
	}

	void RuntimeCallbacks::AddMethodCallback(MethodCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	method_callbacks_.push_back(cb);
	}

	void RuntimeCallbacks::RemoveMethodCallback(MethodCallback* cb) {
	WriterMutexLock mu(Thread::Current(), *callback_lock_);
	Remove(cb, &method_callbacks_);
	}

	void RuntimeCallbacks::RegisterNativeMethod(ArtMethod* method,
	const void* in_cur_method,
	/out/void** new_method) {
	void* cur_method = const_cast<void*>(in_cur_method);
	*new_method = cur_method;
	for (MethodCallback* cb : COPY(method_callbacks_)) {
	cb->RegisterNativeMethod(method, cur_method, new_method);
	if (*new_method != nullptr) {
	cur_method = *new_method;
	}
	}
	}

	} // namespace art