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/*
* Copyright (C) 2011 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_SRC_INSTRUMENTATION_H_
#define ART_SRC_INSTRUMENTATION_H_
#include <ostream>
#include <set>
#include <string>
#include "file.h"
#include "globals.h"
#include "macros.h"
#include "safe_map.h"
#include "trace.h"
#include "UniquePtr.h"
namespace art {
class AbstractMethod;
class Thread;
uint32_t InstrumentationMethodUnwindFromCode(Thread* self);
struct InstrumentationStackFrame {
InstrumentationStackFrame(AbstractMethod* method, uintptr_t return_pc)
: method_(method), return_pc_(return_pc) {
}
AbstractMethod* method_;
uintptr_t return_pc_;
};
class Instrumentation {
public:
Instrumentation() {}
~Instrumentation();
// Replaces code of each method with a pointer to a stub for method tracing.
void InstallStubs();
// Restores original code for each method and fixes the return values of each thread's stack.
void UninstallStubs() LOCKS_EXCLUDED(Locks::thread_list_lock_);
const void* GetSavedCodeFromMap(const AbstractMethod* method);
void SaveAndUpdateCode(AbstractMethod* method);
void ResetSavedCode(AbstractMethod* method);
Trace* GetTrace() const;
void SetTrace(Trace* trace);
void RemoveTrace();
private:
void AddSavedCodeToMap(const AbstractMethod* method, const void* code);
void RemoveSavedCodeFromMap(const AbstractMethod* method);
// Maps a method to its original code pointer.
SafeMap<const AbstractMethod*, const void*> saved_code_map_;
Trace* trace_;
DISALLOW_COPY_AND_ASSIGN(Instrumentation);
};
} // namespace art
#endif // ART_SRC_INSTRUMENTATION_H_