# profiler_node.h

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    00001 // -*- C++ -*-
    00002 //
    00003 // Copyright (C) 2009 Free Software Foundation, Inc.
    00004 //
    00005 // This file is part of the GNU ISO C++ Library.  This library is free
    00006 // software; you can redistribute it and/or modify it under the terms
    00007 // of the GNU General Public License as published by the Free Software
    00008 // Foundation; either version 2, or (at your option) any later
    00009 // version.
    00010
    00011 // This library is distributed in the hope that it will be useful, but
    00012 // WITHOUT ANY WARRANTY; without even the implied warranty of
    00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00014 // General Public License for more details.
    00015
    00016 // You should have received a copy of the GNU General Public License
    00017 // along with this library; see the file COPYING.  If not, write to
    00018 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
    00019 // MA 02111-1307, USA.
    00020
    00021 // As a special exception, you may use this file as part of a free
    00022 // software library without restriction.  Specifically, if other files
    00023 // instantiate templates or use macros or inline functions from this
    00024 // file, or you compile this file and link it with other files to
    00025 // produce an executable, this file does not by itself cause the
    00026 // resulting executable to be covered by the GNU General Public
    00027 // License.  This exception does not however invalidate any other
    00028 // reasons why the executable file might be covered by the GNU General
    00029 // Public License.
    00030
    00031 /** @file profile/impl/profiler_node.h
    00032  *  @brief Data structures to represent a single profiling event.
    00033  */
    00034
    00035 // Written by Lixia Liu and Silvius Rus.
    00036
    00037 #ifndef _GLIBCXX_PROFILE_PROFILER_NODE_H
    00038 #define _GLIBCXX_PROFILE_PROFILER_NODE_H 1
    00039
    00040 #ifdef __GXX_EXPERIMENTAL_CXX0X__
    00041 #include <cstdio>
    00042 #include <cstdint>
    00043 #include <cstring>
    00044 #else
    00045 #include <stdio.h>
    00046 #include <stdint.h>
    00047 #include <string.h>
    00048 #endif
    00049 #include <vector>
    00050 #if defined _GLIBCXX_HAVE_EXECINFO_H
    00051 #include <execinfo.h>
    00052 #endif
    00053
    00054 namespace __gnu_profile
    00055 {
    00056 typedef const void* __object_t;
    00057 typedef void* __instruction_address_t;
    00058 typedef std::_GLIBCXX_STD_PR::vector<__instruction_address_t> __stack_npt;
    00059 typedef __stack_npt* __stack_t;
    00060
    00061 size_t __stack_max_depth();
    00062
    00063 inline __stack_t __get_stack()
    00064 {
    00065 #if defined _GLIBCXX_HAVE_EXECINFO_H
    00066   size_t __max_depth = __stack_max_depth();
    00067   if (__max_depth == 0)
    00068     return NULL;
    00069   __stack_npt __buffer(__max_depth);
    00070   int __depth = backtrace(&__buffer[0], __max_depth);
    00071   __stack_t __stack = new __stack_npt(__depth);
    00072   memcpy(&(*__stack)[0], &__buffer[0], __depth * sizeof(__object_t));
    00073   return __stack;
    00074 #else
    00075   return NULL;
    00076 #endif
    00077 }
    00078
    00079 inline __size(const __stack_t& __stack)
    00080 {
    00081   if (!__stack) {
    00082     return 0;
    00083   } else {
    00084     return __stack->size();
    00085   }
    00086 }
    00087
    00088 inline void __write(FILE* __f, const __stack_t __stack)
    00089 {
    00090   if (!__stack) {
    00091     return;
    00092   }
    00093
    00094   __stack_npt::const_iterator __it;
    00095   for (__it = __stack->begin(); __it != __stack->end(); ++__it) {
    00096     fprintf(__f, "%p ", *__it);
    00097   }
    00098 }
    00099
    00100 /** @brief Hash function for summary trace using call stack as index.  */
    00101 class __stack_hash
    00102 {
    00103  public:
    00104   size_t operator()(const __stack_t __s) const
    00105   {
    00106     if (!__s) {
    00107       return 0;
    00108     }
    00109
    00110     uintptr_t __index = 0;
    00111     __stack_npt::const_iterator __it;
    00112     for (__it = __s->begin(); __it != __s->end(); ++__it) {
    00113       __index += reinterpret_cast<uintptr_t>(*__it);
    00114     }
    00115     return __index;
    00116   }
    00117
    00118   bool operator() (const __stack_t __stack1, const __stack_t __stack2) const
    00119   {
    00120     if (!__stack1 && !__stack2) return true;
    00121     if (!__stack1 || !__stack2) return false;
    00122     if (__stack1->size() != __stack2->size()) return false;
    00123
    00124     size_t __byte_size = __stack1->size() * sizeof(__stack_npt::value_type);
    00125     return memcmp(&(*__stack1)[0], &(*__stack2)[0], __byte_size) == 0;
    00126   }
    00127 };
    00128
    00129 /** @brief Base class for a line in the object table.  */
    00130 class __object_info_base
    00131 {
    00132  public:
    00133   __object_info_base() {}
    00134   __object_info_base(__stack_t __stack);
    00135   __object_info_base(const __object_info_base& o);
    00136   virtual ~__object_info_base() {}
    00137   bool __is_valid() const { return _M_valid; }
    00138   __stack_t __stack() const { return _M_stack; }
    00139   virtual void __write(FILE* f) const = 0;
    00140
    00141  protected:
    00142   __stack_t _M_stack;
    00143   bool _M_valid;
    00144 };
    00145
    00146 inline __object_info_base::__object_info_base(__stack_t __stack)
    00147 {
    00148   _M_stack = __stack;
    00149   _M_valid = true;
    00150 }
    00151
    00152 inline __object_info_base::__object_info_base(const __object_info_base& __o)
    00153 {
    00154   _M_stack = __o._M_stack;
    00155   _M_valid = __o._M_valid;
    00156 }
    00157
    00158 /** @brief Base class for a line in the stack table.  */
    00159 template<typename __object_info>
    00160 class __stack_info_base
    00161 {
    00162  public:
    00163   __stack_info_base() {}
    00164   __stack_info_base(const __object_info& __info) = 0;
    00165   virtual ~__stack_info_base() {}
    00166   void __merge(const __object_info& __info) = 0;
    00167   virtual float __magnitude() const = 0;
    00168   virtual const char* __get_id() const = 0;
    00169 };
    00170
    00171 } // namespace __gnu_profile
    00172 #endif /* _GLIBCXX_PROFILE_PROFILER_NODE_H */