Edit File: profiler_node.h
// -*- C++ -*- // // Copyright (C) 2009-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. /** @file profile/impl/profiler_node.h * @brief Data structures to represent a single profiling event. */ // Written by Lixia Liu and Silvius Rus. #ifndef _GLIBCXX_PROFILE_PROFILER_NODE_H #define _GLIBCXX_PROFILE_PROFILER_NODE_H 1 #include <cstdio> // FILE, fprintf #include <vector> #if defined _GLIBCXX_HAVE_EXECINFO_H #include <execinfo.h> #endif namespace __gnu_profile { typedef void* __instruction_address_t; typedef std::_GLIBCXX_STD_C::vector<__instruction_address_t> __stack_npt; typedef __stack_npt* __stack_t; std::size_t __stack_max_depth(); inline __stack_t __get_stack() { #if defined _GLIBCXX_HAVE_EXECINFO_H __try { std::size_t __max_depth = __stack_max_depth(); if (__max_depth == 0) return 0; __stack_npt __buffer(__max_depth); int __depth = backtrace(&__buffer[0], __max_depth); return new(std::nothrow) __stack_npt(__buffer.begin(), __buffer.begin() + __depth); } __catch(...) { return 0; } #else return 0; #endif } inline std::size_t __size(__stack_t __stack) { if (!__stack) return 0; else return __stack->size(); } // XXX inline void __write(FILE* __f, __stack_t __stack) { if (!__stack) return; __stack_npt::const_iterator __it; for (__it = __stack->begin(); __it != __stack->end(); ++__it) std::fprintf(__f, "%p ", *__it); } /** @brief Hash function for summary trace using call stack as index. */ class __stack_hash { public: std::size_t operator()(__stack_t __s) const { if (!__s) return 0; std::size_t __index = 0; __stack_npt::const_iterator __it; for (__it = __s->begin(); __it != __s->end(); ++__it) __index += reinterpret_cast<std::size_t>(*__it); return __index; } bool operator() (__stack_t __stack1, __stack_t __stack2) const { if (!__stack1 && !__stack2) return true; if (!__stack1 || !__stack2) return false; if (__stack1->size() != __stack2->size()) return false; std::size_t __byte_size = __stack1->size() * sizeof(__stack_npt::value_type); return __builtin_memcmp(&(*__stack1)[0], &(*__stack2)[0], __byte_size) == 0; } }; /** @brief Base class for a line in the object table. */ class __object_info_base { public: __object_info_base(__stack_t __stack) : _M_stack(__stack), _M_valid(true) { } bool __is_valid() const { return _M_valid; } void __set_invalid() { _M_valid = false; } void __merge(const __object_info_base& __o) { _M_valid &= __o._M_valid; } __stack_t __stack() const { return _M_stack; } protected: __stack_t _M_stack; bool _M_valid; }; } // namespace __gnu_profile #endif /* _GLIBCXX_PROFILE_PROFILER_NODE_H */
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