Milan Radosavljevic
666e76deac
* Add cached demangler and replace old * Add unit tests * Applied suggestions from code review * Applied suggestions from code review
145 lignes
4.0 KiB
C++
145 lignes
4.0 KiB
C++
// MIT License
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//
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// Copyright (c) 2022-2025 Advanced Micro Devices, Inc. All Rights Reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#pragma once
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#include <cstdlib>
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#include <cxxabi.h>
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#include <functional>
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#include <map>
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#include <memory>
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#include <mutex>
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#include <shared_mutex>
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#include <string>
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#include <string_view>
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namespace rocprofsys
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{
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namespace utility
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{
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struct cxa_demangle_wrapper_impl
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{
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static char* demangle(const char* _mangled_name, char* _output_buffer,
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size_t* _length, int* _status)
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{
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return abi::__cxa_demangle(_mangled_name, _output_buffer, _length, _status);
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}
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};
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template <typename DemanglerTp = cxa_demangle_wrapper_impl>
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struct demangler
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{
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template <typename Tp>
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std::string demangle()
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{
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return demangle(typeid(Tp).name());
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}
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std::string demangle(std::string_view _mangled_name)
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{
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if(_mangled_name.empty()) return {};
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const auto result = try_get_from_cache(_mangled_name);
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if(result._found)
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{
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return result._cache_it->second;
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}
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// Possible improvement: Limit the cache size to avoid memory bloat
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return demangle_and_cache(_mangled_name);
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}
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private:
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std::shared_mutex m_mutex;
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std::map<std::string, std::string, std::less<>> m_cache;
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using cache_iterator = typename decltype(m_cache)::iterator;
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struct cache_result
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{
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bool _found;
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cache_iterator _cache_it;
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};
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static std::string demangle_impl(const char* _mangled_name)
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{
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int _status = 0;
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std::unique_ptr<char, decltype(&std::free)> _demangled(
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DemanglerTp::demangle(_mangled_name, nullptr, nullptr, &_status), &std::free);
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if(_status != 0 || !_demangled) return std::string{ _mangled_name };
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return std::string{ _demangled.get() };
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}
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cache_result try_get_from_cache(std::string_view _mangled_name)
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{
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std::shared_lock<std::shared_mutex> _read_lock{ m_mutex };
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auto _it = m_cache.find(_mangled_name);
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if(_it != m_cache.end())
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{
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return { true, _it };
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}
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return { false, m_cache.end() };
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}
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std::string demangle_and_cache(std::string_view _mangled_name)
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{
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std::unique_lock<std::shared_mutex> _write_lock{ m_mutex };
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auto _it = m_cache.find(_mangled_name);
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if(_it != m_cache.end())
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{
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return _it->second;
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}
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auto _result = demangle_impl(_mangled_name.data());
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m_cache.emplace(_mangled_name, _result);
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return _result;
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}
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};
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inline demangler<>&
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get_demangler()
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{
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static demangler g_demangler;
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return g_demangler;
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}
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template <typename Tp>
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inline std::string
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demangle()
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{
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return get_demangler().demangle<Tp>();
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}
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inline std::string
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demangle(std::string_view name)
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{
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return get_demangler().demangle(name);
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}
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} // namespace utility
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} // namespace rocprofsys
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