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/*
* Copyright 2014 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.
*/
#ifndef ART_RUNTIME_JIT_JIT_INSTRUMENTATION_H_
#define ART_RUNTIME_JIT_JIT_INSTRUMENTATION_H_
#include <unordered_map>
#include "instrumentation.h"
#include "atomic.h"
#include "base/macros.h"
#include "base/mutex.h"
#include "gc_root.h"
#include "jni.h"
#include "object_callbacks.h"
#include "thread_pool.h"
namespace art {
namespace mirror {
class ArtField;
class ArtMethod;
class Class;
class Object;
class Throwable;
} // namespace mirror
union JValue;
class Thread;
class ThrowLocation;
namespace jit {
// Keeps track of which methods are hot.
class JitInstrumentationCache {
public:
explicit JitInstrumentationCache(size_t hot_method_threshold);
void AddSamples(Thread* self, mirror::ArtMethod* method, size_t samples)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void SignalCompiled(Thread* self, mirror::ArtMethod* method)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
void CreateThreadPool();
void DeleteThreadPool();
private:
Mutex lock_;
std::unordered_map<jmethodID, size_t> samples_;
size_t hot_method_threshold_;
std::unique_ptr<ThreadPool> thread_pool_;
};
class JitInstrumentationListener : public instrumentation::InstrumentationListener {
public:
explicit JitInstrumentationListener(JitInstrumentationCache* cache);
virtual void MethodEntered(Thread* thread, mirror::Object* /*this_object*/,
mirror::ArtMethod* method, uint32_t /*dex_pc*/)
OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
instrumentation_cache_->AddSamples(thread, method, 1);
}
virtual void MethodExited(Thread* /*thread*/, mirror::Object* /*this_object*/,
mirror::ArtMethod* /*method*/, uint32_t /*dex_pc*/,
const JValue& /*return_value*/)
OVERRIDE { }
virtual void MethodUnwind(Thread* /*thread*/, mirror::Object* /*this_object*/,
mirror::ArtMethod* /*method*/, uint32_t /*dex_pc*/) OVERRIDE { }
virtual void FieldRead(Thread* /*thread*/, mirror::Object* /*this_object*/,
mirror::ArtMethod* /*method*/, uint32_t /*dex_pc*/,
mirror::ArtField* /*field*/) OVERRIDE { }
virtual void FieldWritten(Thread* /*thread*/, mirror::Object* /*this_object*/,
mirror::ArtMethod* /*method*/, uint32_t /*dex_pc*/,
mirror::ArtField* /*field*/, const JValue& /*field_value*/)
OVERRIDE { }
virtual void ExceptionCaught(Thread* /*thread*/, const ThrowLocation& /*throw_location*/,
mirror::ArtMethod* /*catch_method*/, uint32_t /*catch_dex_pc*/,
mirror::Throwable* /*exception_object*/) OVERRIDE { }
virtual void DexPcMoved(Thread* /*self*/, mirror::Object* /*this_object*/,
mirror::ArtMethod* /*method*/, uint32_t /*new_dex_pc*/) OVERRIDE { }
// We only care about how many dex instructions were executed in the Jit.
virtual void BackwardBranch(Thread* thread, mirror::ArtMethod* method, int32_t dex_pc_offset)
OVERRIDE SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
CHECK_LE(dex_pc_offset, 0);
instrumentation_cache_->AddSamples(thread, method, 1);
}
private:
JitInstrumentationCache* const instrumentation_cache_;
};
} // namespace jit
} // namespace art
#endif // ART_RUNTIME_JIT_JIT_INSTRUMENTATION_H_
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