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// Copyright (c) 2017 Egor Tensin <egor@tensin.name>
// This file is part of the "winapi-debug" project.
// For details, see https://github.com/egor-tensin/winapi-debug.
// Distributed under the MIT License.
#pragma once
#include "address.hpp"
#include "module.hpp"
#include <dbghelp.h>
#include <windows.h>
#include <array>
#include <climits>
#include <cstddef>
#include <string>
#include <type_traits>
namespace winapi {
namespace symbol {
// MinGW-w64 (as of version 7.0) doesn't have SymTagEnum
using Tag = ULONG;
constexpr Tag SYM_TAG_FUNCTION = 5;
#ifdef _MSC_VER
static_assert(
static_cast<Tag>(SymTagFunction) == SYM_TAG_FUNCTION,
"unexpected SymTagFunction value"
);
#endif
} // namespace symbol
class SymbolInfo {
public:
using Impl = SYMBOL_INFOW;
SymbolInfo();
explicit SymbolInfo(const Impl& impl);
explicit operator Impl&() {
return get_impl();
}
explicit operator const Impl&() const {
return get_impl();
}
Address get_displacement() const {
return displacement;
}
void set_displacement(Address new_value) {
displacement = new_value;
}
std::string get_name() const;
Address get_offline_base() const {
return get_impl().ModBase;
}
Address get_offline_address() const {
return get_impl().Address;
}
symbol::Tag get_tag() const {
return get_impl().Tag;
}
enum class Type : symbol::Tag {
Function = symbol::SYM_TAG_FUNCTION,
RESERVED = ULONG_MAX,
};
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 char_size = sizeof(std::remove_extent<decltype(Impl::Name)>::type);
static_assert(char_size == sizeof(wchar_t), "Aren't we using the wide WinAPI?");
static constexpr std::size_t max_buffer_size = sizeof(Impl) + (MAX_SYM_NAME - 1) * char_size;
std::array<unsigned char, max_buffer_size> buffer;
Address displacement = 0;
const Impl& get_impl() const {
return *reinterpret_cast<const Impl*>(buffer.data());
}
Impl& get_impl() {
return *reinterpret_cast<Impl*>(buffer.data());
}
};
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;
};
class LineInfo {
public:
using Impl = IMAGEHLP_LINEW64;
explicit LineInfo(const Impl& impl);
const std::string file_path;
const unsigned long line_number;
};
} // namespace winapi
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