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/*
* Copyright (C) 2015 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef DEBUG_MALLOC_GUARDDATA_H
#define DEBUG_MALLOC_GUARDDATA_H
#include <stdint.h>
#include <string.h>
#include <vector>
#include <private/bionic_macros.h>
// Forward declarations.
class DebugData;
struct Header;
struct Config;
class GuardData {
public:
GuardData(int init_value, size_t num_bytes);
virtual ~GuardData() = default;
bool Valid(void* data) { return memcmp(data, cmp_mem_.data(), cmp_mem_.size()) == 0; }
void LogFailure(const Header* header, const void* pointer, const void* data);
protected:
std::vector<uint8_t> cmp_mem_;
virtual const char* GetTypeName() = 0;
DISALLOW_COPY_AND_ASSIGN(GuardData);
};
class FrontGuardData : public GuardData {
public:
FrontGuardData(const Config& config, size_t* offset);
virtual ~FrontGuardData() = default;
bool Valid(DebugData& debug, const Header* header);
void LogFailure(DebugData& debug, const Header* header);
size_t offset() { return offset_; }
private:
const char* GetTypeName() override { return "FRONT"; }
size_t offset_ = 0;
DISALLOW_COPY_AND_ASSIGN(FrontGuardData);
};
class RearGuardData : public GuardData {
public:
RearGuardData(const Config& config);
virtual ~RearGuardData() = default;
bool Valid(DebugData& debug, const Header* header);
void LogFailure(DebugData& debug, const Header* header);
private:
const char* GetTypeName() override { return "REAR"; }
DISALLOW_COPY_AND_ASSIGN(RearGuardData);
};
#endif // DEBUG_MALLOC_GUARDDATA_H
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