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