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// Copyright (c) 2017 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "PDB repository" project.
// For details, see https://github.com/egor-tensin/pdb-repo.
// Distributed under the MIT License.
#pragma once
#include "address.hpp"
#include "module.hpp"
#include <safeint.h>
#include <Windows.h>
#include <DbgHelp.h>
#include <cstddef>
#include <cstring>
#include <stdexcept>
#include <string>
namespace pdb
{
class SymbolInfo
{
public:
typedef SYMBOL_INFO Raw;
SymbolInfo()
: raw{*reinterpret_cast<Raw*>(buffer)}
{
raw.SizeOfStruct = sizeof(Raw);
raw.MaxNameLen = MAX_SYM_NAME;
}
explicit SymbolInfo(const Raw& raw)
: SymbolInfo{}
{
if (raw.SizeOfStruct != sizeof(raw))
throw std::runtime_error{"invalid SYMBOL_INFO.SizeOfStruct"};
const auto raw_size = calc_size(raw);
if (raw_size > sizeof(buffer))
throw std::runtime_error{"SYMBOL_INFO is too large"};
std::memcpy(buffer, &raw, raw_size);
}
explicit operator Raw&() { return raw; }
explicit operator const Raw&() const { return raw; }
Address get_displacement() const { return displacement; }
void set_displacement(Address new_value)
{
displacement = new_value;
}
std::string get_name() const { return {raw.Name, raw.NameLen}; }
Address get_offline_base() const { return raw.ModBase; }
Address get_offline_address() const { return raw.Address; }
typedef ULONG Tag;
Tag get_tag() const { return raw.Tag; }
enum class Type : Tag
{
Function = SymTagFunction,
RESERVED = SymTagMax,
};
Type get_type() const { return static_cast<Type>(get_tag()); }
bool is_function() const { return get_type() == Type::Function; }
private:
static constexpr std::size_t max_buffer_size = sizeof(Raw) + MAX_SYM_NAME - 1;
static std::size_t calc_size(const Raw& raw)
{
using namespace msl::utilities;
try
{
return SafeInt<std::size_t>{raw.SizeOfStruct} + raw.NameLen - 1;
}
catch (const SafeIntException&)
{
throw std::runtime_error{"invalid SYMBOL_INFO size"};
}
}
unsigned char buffer[max_buffer_size] = {0};
Address displacement = 0;
protected:
Raw& raw;
};
class Symbol : public SymbolInfo
{
public:
Symbol(Address online_address, const SymbolInfo& info)
: SymbolInfo{info}
, online_address{online_address}
{ }
Address get_online_address() const { return online_address; }
private:
const Address online_address;
};
}
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