mirror of
https://github.com/autc04/Retro68.git
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156 lines
3.7 KiB
C++
156 lines
3.7 KiB
C++
// -*- C++ -*-
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//
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// Copyright (C) 2009-2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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/** @file profile/impl/profiler_node.h
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* @brief Data structures to represent a single profiling event.
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*/
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// Written by Lixia Liu and Silvius Rus.
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#ifndef _GLIBCXX_PROFILE_PROFILER_NODE_H
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#define _GLIBCXX_PROFILE_PROFILER_NODE_H 1
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#include <cstdio> // FILE, fprintf
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#include <vector>
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#if defined _GLIBCXX_HAVE_EXECINFO_H
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#include <execinfo.h>
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#endif
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namespace __gnu_profile
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{
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typedef void* __instruction_address_t;
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typedef std::_GLIBCXX_STD_C::vector<__instruction_address_t> __stack_npt;
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typedef __stack_npt* __stack_t;
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std::size_t __stack_max_depth();
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inline __stack_t
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__get_stack()
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{
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#if defined _GLIBCXX_HAVE_EXECINFO_H
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__try
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{
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std::size_t __max_depth = __stack_max_depth();
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if (__max_depth == 0)
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return 0;
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__stack_npt __buffer(__max_depth);
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int __depth = backtrace(&__buffer[0], __max_depth);
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return new(std::nothrow) __stack_npt(__buffer.begin(),
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__buffer.begin() + __depth);
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}
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__catch(...)
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{
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return 0;
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}
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#else
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return 0;
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#endif
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}
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inline std::size_t
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__size(__stack_t __stack)
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{
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if (!__stack)
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return 0;
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else
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return __stack->size();
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}
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// XXX
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inline void
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__write(FILE* __f, __stack_t __stack)
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{
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if (!__stack)
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return;
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__stack_npt::const_iterator __it;
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for (__it = __stack->begin(); __it != __stack->end(); ++__it)
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std::fprintf(__f, "%p ", *__it);
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}
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/** @brief Hash function for summary trace using call stack as index. */
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class __stack_hash
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{
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public:
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std::size_t
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operator()(__stack_t __s) const
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{
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if (!__s)
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return 0;
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std::size_t __index = 0;
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__stack_npt::const_iterator __it;
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for (__it = __s->begin(); __it != __s->end(); ++__it)
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__index += reinterpret_cast<std::size_t>(*__it);
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return __index;
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}
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bool operator() (__stack_t __stack1, __stack_t __stack2) const
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{
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if (!__stack1 && !__stack2)
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return true;
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if (!__stack1 || !__stack2)
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return false;
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if (__stack1->size() != __stack2->size())
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return false;
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std::size_t __byte_size
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= __stack1->size() * sizeof(__stack_npt::value_type);
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return __builtin_memcmp(&(*__stack1)[0], &(*__stack2)[0],
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__byte_size) == 0;
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}
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};
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/** @brief Base class for a line in the object table. */
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class __object_info_base
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{
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public:
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__object_info_base(__stack_t __stack)
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: _M_stack(__stack), _M_valid(true) { }
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bool
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__is_valid() const
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{ return _M_valid; }
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void
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__set_invalid()
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{ _M_valid = false; }
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void
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__merge(const __object_info_base& __o)
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{ _M_valid &= __o._M_valid; }
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__stack_t
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__stack() const
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{ return _M_stack; }
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protected:
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__stack_t _M_stack;
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bool _M_valid;
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};
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} // namespace __gnu_profile
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#endif /* _GLIBCXX_PROFILE_PROFILER_NODE_H */
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