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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.
#include "pdb/all.hpp"
#include <map>
#include <stdexcept>
#include <string>
#include <utility>
namespace pdb
{
namespace
{
template <typename Value>
const Module& guess_module(
const std::map<Address, Value>& modules,
Address pivot)
{
if (modules.empty())
throw std::range_error{"there're no modules to choose from"};
auto it = modules.lower_bound(pivot);
if (it == modules.cend())
{
--it;
return it->second;
}
if (it->first > pivot)
{
if (it == modules.cbegin())
throw std::range_error{"couldn't choose a module"};
--it;
return it->second;
}
return it->second;
}
Address address_online_to_offline(const Module& module, Address online)
{
return module.get_offline_base() + online - module.get_online_base();
}
Address address_offline_to_online(const Module& module, Address offline)
{
return module.get_online_base() + offline - module.get_offline_base();
}
}
Address Repo::add_pdb(Address online_base, const std::string& path)
{
Module module{online_base, dbghelp.load_pdb(path)};
const auto offline_base = module.get_offline_base();
const auto it = online_modules.emplace(online_base, std::move(module));
offline_modules.emplace(offline_base, it.first->second);
return offline_base;
}
void Repo::enum_symbols(const OnSymbol& callback) const
{
for (const auto& it : offline_modules)
enum_symbols(it.second, callback);
}
void Repo::enum_symbols(Address offline_base, const OnSymbol& callback) const
{
const auto it = offline_modules.find(offline_base);
if (it == offline_modules.cend())
throw std::runtime_error{"unknown module"};
enum_symbols(it->second, callback);
}
void Repo::enum_symbols(const Module& module, const OnSymbol& callback) const
{
dbghelp.enum_symbols(module, [&] (const SymbolInfo& raw)
{
callback(symbol_from_buffer(module, raw));
});
}
Symbol Repo::resolve_symbol(Address online) const
{
return symbol_from_buffer(dbghelp.resolve_symbol(address_online_to_offline(online)));
}
Symbol Repo::resolve_symbol(const std::string& name) const
{
return symbol_from_buffer(dbghelp.resolve_symbol(name));
}
Symbol Repo::symbol_from_buffer(const SymbolInfo& raw) const
{
const auto it = offline_modules.find(raw.get_offline_base());
if (it == offline_modules.cend())
throw std::runtime_error{"symbol's module is unknown"};
return symbol_from_buffer(it->second, raw);
}
Symbol Repo::symbol_from_buffer(const Module& module, const SymbolInfo& raw) const
{
return {pdb::address_offline_to_online(module, raw.get_offline_address()), raw};
}
Address Repo::address_online_to_offline(Address online) const
{
return pdb::address_online_to_offline(module_from_online_address(online), online);
}
Address Repo::address_offline_to_online(Address offline) const
{
return pdb::address_offline_to_online(module_from_offline_address(offline), offline);
}
const Module& Repo::module_from_online_address(Address online) const
{
return guess_module(online_modules, online);
}
const Module& Repo::module_from_offline_address(Address offline) const
{
return guess_module(offline_modules, offline);
}
}
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