profiler_node.h
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// -*- 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 */
cstdio
vector
__gnu_profile
GNU profile code for public use.
__gnu_profile::__object_info_base
Base class for a line in the object table.
Definition: profiler_node.h:127
__gnu_profile::__stack_hash
Hash function for summary trace using call stack as index.
Definition: profiler_node.h:93