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// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "AES tools" project.
// For details, see https://github.com/egor-tensin/aes-tools.
// Distributed under the MIT License.
#pragma once
#ifdef WIN32
#include <windows.h>
#include <DbgHelp.h>
#pragma comment(lib, "DbgHelp.Lib")
#endif
#include <cstddef>
#include <sstream>
#include <string>
namespace aes
{
namespace aux
{
class CallStackFormatter
{
public:
CallStackFormatter() = default;
std::string format_address(const void* addr) const
{
#ifdef WIN32
return format_address_win32(addr);
#else
return format_address_fallback(addr);
#endif
}
private:
template <typename T>
static std::string put_between_brackets(const T& x)
{
std::ostringstream oss;
oss << "[" << x << "]";
return oss.str();
}
template <typename T>
static std::string stringify(const T& x)
{
std::ostringstream oss;
oss << x;
return oss.str();
}
static std::string format_address_fallback(const void* addr)
{
return put_between_brackets(addr);
}
static std::string format_module(
const std::string& module_name,
const void* offset = nullptr)
{
if (offset == nullptr)
return put_between_brackets(module_name);
else
return put_between_brackets(module_name + "+" + stringify(offset));
}
static std::string format_symbol(
const std::string& symbol_name,
const void* offset = nullptr)
{
return format_module(symbol_name, offset);
}
static std::string format_symbol(
const std::string& module_name,
const std::string& symbol_name,
const void* offset = nullptr)
{
return format_symbol(module_name + "!" + symbol_name, offset);
}
#ifdef WIN32
class DbgHelp
{
public:
DbgHelp()
{
initialized_flag = SymInitialize(GetCurrentProcess(), NULL, TRUE) != FALSE;
}
bool initialized() const
{
return initialized_flag;
}
~DbgHelp()
{
if (initialized_flag)
SymCleanup(GetCurrentProcess());
}
private:
bool initialized_flag = false;
DbgHelp(const DbgHelp&) = delete;
DbgHelp& operator=(const DbgHelp&) = delete;
};
DbgHelp dbghelp;
std::string format_address_win32(const void* addr) const
{
if (!dbghelp.initialized())
return format_address_fallback(addr);
DWORD64 symbol_info_buf[sizeof(SYMBOL_INFO) + MAX_SYM_NAME];
const auto symbol_info = reinterpret_cast<SYMBOL_INFO*>(symbol_info_buf);
symbol_info->SizeOfStruct = sizeof(SYMBOL_INFO);
symbol_info->MaxNameLen = MAX_SYM_NAME;
IMAGEHLP_MODULE64 module_info;
module_info.SizeOfStruct = sizeof(IMAGEHLP_MODULE64);
DWORD64 symbol_offset;
const auto symbol_resolved = SymFromAddr(
GetCurrentProcess(),
reinterpret_cast<DWORD64>(addr),
&symbol_offset,
symbol_info);
if (symbol_resolved)
{
const auto module_resolved = SymGetModuleInfo64(
GetCurrentProcess(),
symbol_info->ModBase,
&module_info);
if (module_resolved)
{
return format_symbol(
module_info.ModuleName,
symbol_info->Name,
reinterpret_cast<const void*>(symbol_offset));
}
else
{
return format_symbol(symbol_info->Name, addr);
}
}
else
{
const auto module_resolved = SymGetModuleInfo64(
GetCurrentProcess(),
reinterpret_cast<DWORD64>(addr),
&module_info);
if (module_resolved)
{
const auto module_offset = reinterpret_cast<const char*>(addr) - module_info.BaseOfImage;
return format_module(module_info.ModuleName, module_offset);
}
else
{
return format_address_fallback(addr);
}
}
}
#endif
};
}
}
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