profiler_hash_func.h
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// -*- C++ -*-
//
// Copyright (C) 2009-2013 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_hash_func.h
* @brief Data structures to represent profiling traces.
*/
// Written by Lixia Liu and Silvius Rus.
#ifndef _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H
#define _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H 1
#include "profile/impl/profiler.h"
#include "profile/impl/profiler_node.h"
#include "profile/impl/profiler_trace.h"
namespace __gnu_profile
{
/** @brief A hash performance instrumentation line in the object table. */
class __hashfunc_info
: public __object_info_base
{
public:
__hashfunc_info()
: _M_longest_chain(0), _M_accesses(0), _M_hops(0) { }
__hashfunc_info(const __hashfunc_info& __o)
: __object_info_base(__o), _M_longest_chain(__o._M_longest_chain),
_M_accesses(__o._M_accesses), _M_hops(__o._M_hops) { }
__hashfunc_info(__stack_t __stack)
: __object_info_base(__stack), _M_longest_chain(0),
_M_accesses(0), _M_hops(0) { }
virtual ~__hashfunc_info() { }
void
__merge(const __hashfunc_info& __o)
{
_M_longest_chain = std::max(_M_longest_chain, __o._M_longest_chain);
_M_accesses += __o._M_accesses;
_M_hops += __o._M_hops;
}
void
__destruct(std::size_t __chain, std::size_t __accesses,
std::size_t __hops)
{
_M_longest_chain = std::max(_M_longest_chain, __chain);
_M_accesses += __accesses;
_M_hops += __hops;
}
void
__write(FILE* __f) const
{ std::fprintf(__f, "%Zu %Zu %Zu\n", _M_hops,
_M_accesses, _M_longest_chain); }
float
__magnitude() const
{ return static_cast<float>(_M_hops); }
std::string
__advice() const
{ return "change hash function"; }
private:
std::size_t _M_longest_chain;
std::size_t _M_accesses;
std::size_t _M_hops;
};
/** @brief A hash performance instrumentation line in the stack table. */
class __hashfunc_stack_info
: public __hashfunc_info
{
public:
__hashfunc_stack_info(const __hashfunc_info& __o)
: __hashfunc_info(__o) { }
};
/** @brief Hash performance instrumentation producer. */
class __trace_hash_func
: public __trace_base<__hashfunc_info, __hashfunc_stack_info>
{
public:
__trace_hash_func()
: __trace_base<__hashfunc_info, __hashfunc_stack_info>()
{ __id = "hash-distr"; }
~__trace_hash_func() {}
// Insert a new node at construct with object, callstack and initial size.
void
__insert(__object_t __obj, __stack_t __stack)
{ __add_object(__obj, __hashfunc_info(__stack)); }
// Call at destruction/clean to set container final size.
void
__destruct(const void* __obj, std::size_t __chain,
std::size_t __accesses, std::size_t __hops)
{
if (!__is_on())
return;
// First find the item from the live objects and update the informations.
__hashfunc_info* __objs = __get_object_info(__obj);
if (!__objs)
return;
__objs->__destruct(__chain, __accesses, __hops);
__retire_object(__obj);
}
};
inline void
__trace_hash_func_init()
{ _GLIBCXX_PROFILE_DATA(_S_hash_func) = new __trace_hash_func(); }
inline void
__trace_hash_func_report(FILE* __f, __warning_vector_t& __warnings)
{
if (_GLIBCXX_PROFILE_DATA(_S_hash_func))
{
_GLIBCXX_PROFILE_DATA(_S_hash_func)->__collect_warnings(__warnings);
_GLIBCXX_PROFILE_DATA(_S_hash_func)->__write(__f);
}
}
inline void
__trace_hash_func_construct(const void* __obj)
{
if (!__profcxx_init())
return;
_GLIBCXX_PROFILE_DATA(_S_hash_func)->__insert(__obj, __get_stack());
}
inline void
__trace_hash_func_destruct(const void* __obj, std::size_t __chain,
std::size_t __accesses, std::size_t __hops)
{
if (!__profcxx_init())
return;
_GLIBCXX_PROFILE_DATA(_S_hash_func)->__destruct(__obj, __chain,
__accesses, __hops);
}
} // namespace __gnu_profile
#endif /* _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H */