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/*
* Copyright (C) 2008 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_FAULT_HANDLER_H_
#define ART_RUNTIME_FAULT_HANDLER_H_
#include <signal.h>
#include <vector>
#include <setjmp.h>
#include <stdint.h>
#include "base/mutex.h" // For annotalysis.
namespace art {
class FaultHandler;
class FaultManager {
public:
FaultManager();
~FaultManager();
void Init();
void HandleFault(int sig, siginfo_t* info, void* context);
void AddHandler(FaultHandler* handler);
void RemoveHandler(FaultHandler* handler);
private:
bool IsInGeneratedCode(void *context) NO_THREAD_SAFETY_ANALYSIS;
void GetMethodAndReturnPC(void* context, uintptr_t& method, uintptr_t& return_pc);
typedef std::vector<FaultHandler*> Handlers;
Handlers handlers_;
struct sigaction oldaction_;
};
class FaultHandler {
public:
FaultHandler() : manager_(nullptr) {}
explicit FaultHandler(FaultManager* manager) : manager_(manager) {}
virtual ~FaultHandler() {}
virtual bool Action(int sig, siginfo_t* siginfo, void* context) = 0;
protected:
FaultManager* const manager_;
};
class NullPointerHandler FINAL : public FaultHandler {
public:
NullPointerHandler() {}
explicit NullPointerHandler(FaultManager* manager);
bool Action(int sig, siginfo_t* siginfo, void* context) OVERRIDE;
};
class SuspensionHandler FINAL : public FaultHandler {
public:
SuspensionHandler() {}
explicit SuspensionHandler(FaultManager* manager);
bool Action(int sig, siginfo_t* siginfo, void* context) OVERRIDE;
};
class StackOverflowHandler FINAL : public FaultHandler {
public:
StackOverflowHandler() {}
explicit StackOverflowHandler(FaultManager* manager);
bool Action(int sig, siginfo_t* siginfo, void* context) OVERRIDE;
};
// Statically allocated so the the signal handler can get access to it.
extern FaultManager fault_manager;
} // namespace art
#endif // ART_RUNTIME_FAULT_HANDLER_H_
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