libstdc++
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00001 // -*- C++ -*- 00002 // 00003 // Copyright (C) 2009, 2010, 2011 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_container_size.h 00032 * @brief Diagnostics for container sizes. 00033 */ 00034 00035 // Written by Lixia Liu and Silvius Rus. 00036 00037 #ifndef _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H 00038 #define _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H 1 00039 00040 #include <sstream> 00041 00042 #include "profile/impl/profiler.h" 00043 #include "profile/impl/profiler_node.h" 00044 #include "profile/impl/profiler_trace.h" 00045 00046 namespace __gnu_profile 00047 { 00048 /** @brief A container size instrumentation line in the object table. */ 00049 class __container_size_info 00050 : public __object_info_base 00051 { 00052 public: 00053 __container_size_info() 00054 : _M_init(0), _M_max(0), _M_min(0), _M_total(0), _M_item_min(0), 00055 _M_item_max(0), _M_item_total(0), _M_count(0), _M_resize(0), _M_cost(0) 00056 { } 00057 00058 __container_size_info(const __container_size_info& __o) 00059 : __object_info_base(__o), _M_init(__o._M_init), _M_max(__o._M_max), 00060 _M_min(__o._M_min), _M_total(__o._M_total), 00061 _M_item_min(__o._M_item_min), _M_item_max(__o._M_item_max), 00062 _M_item_total(__o._M_item_total), _M_count(__o._M_count), 00063 _M_resize(__o._M_resize), _M_cost(__o._M_cost) 00064 { } 00065 00066 __container_size_info(__stack_t __stack, std::size_t __num) 00067 : __object_info_base(__stack), _M_init(__num), _M_max(__num), 00068 _M_min(0), _M_total(0), _M_item_min(0), _M_item_max(0), 00069 _M_item_total(0), _M_count(0), _M_resize(0), _M_cost(0) 00070 { } 00071 00072 virtual ~__container_size_info() { } 00073 00074 void 00075 __write(FILE* __f) const 00076 { 00077 std::fprintf(__f, "%Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu\n", 00078 _M_init, _M_count, _M_cost, _M_resize, _M_min, _M_max, 00079 _M_total, _M_item_min, _M_item_max, _M_item_total); 00080 } 00081 00082 float 00083 __magnitude() const 00084 { return static_cast<float>(_M_cost); } 00085 00086 std::string 00087 __advice() const 00088 { 00089 std::stringstream __message; 00090 if (_M_init < _M_item_max) 00091 __message << "change initial container size from " << _M_init 00092 << " to " << _M_item_max; 00093 return __message.str(); 00094 } 00095 00096 void 00097 __merge(const __container_size_info& __o) 00098 { 00099 _M_init = std::max(_M_init, __o._M_init); 00100 _M_max = std::max(_M_max, __o._M_max); 00101 _M_item_max = std::max(_M_item_max, __o._M_item_max); 00102 _M_min = std::min(_M_min, __o._M_min); 00103 _M_item_min = std::min(_M_item_min, __o._M_item_min); 00104 _M_total += __o._M_total; 00105 _M_item_total += __o._M_item_total; 00106 _M_count += __o._M_count; 00107 _M_cost += __o._M_cost; 00108 _M_resize += __o._M_resize; 00109 } 00110 00111 // Call if a container is destructed or cleaned. 00112 void 00113 __destruct(std::size_t __num, std::size_t __inum) 00114 { 00115 _M_max = std::max(_M_max, __num); 00116 _M_item_max = std::max(_M_item_max, __inum); 00117 if (_M_min == 0) 00118 { 00119 _M_min = __num; 00120 _M_item_min = __inum; 00121 } 00122 else 00123 { 00124 _M_min = std::min(_M_min, __num); 00125 _M_item_min = std::min(_M_item_min, __inum); 00126 } 00127 _M_total += __num; 00128 _M_item_total += __inum; 00129 _M_count += 1; 00130 } 00131 00132 // Estimate the cost of resize/rehash. 00133 float 00134 __resize_cost(std::size_t __from, std::size_t) 00135 { return __from; } 00136 00137 // Call if container is resized. 00138 void 00139 __resize(std::size_t __from, std::size_t __to) 00140 { 00141 _M_cost += this->__resize_cost(__from, __to); 00142 _M_resize += 1; 00143 _M_max = std::max(_M_max, __to); 00144 } 00145 00146 private: 00147 std::size_t _M_init; 00148 std::size_t _M_max; // range of # buckets 00149 std::size_t _M_min; 00150 std::size_t _M_total; 00151 std::size_t _M_item_min; // range of # items 00152 std::size_t _M_item_max; 00153 std::size_t _M_item_total; 00154 std::size_t _M_count; 00155 std::size_t _M_resize; 00156 std::size_t _M_cost; 00157 }; 00158 00159 00160 /** @brief A container size instrumentation line in the stack table. */ 00161 class __container_size_stack_info 00162 : public __container_size_info 00163 { 00164 public: 00165 __container_size_stack_info(const __container_size_info& __o) 00166 : __container_size_info(__o) { } 00167 }; 00168 00169 00170 /** @brief Container size instrumentation trace producer. */ 00171 class __trace_container_size 00172 : public __trace_base<__container_size_info, __container_size_stack_info> 00173 { 00174 public: 00175 ~__trace_container_size() { } 00176 00177 __trace_container_size() 00178 : __trace_base<__container_size_info, __container_size_stack_info>() { }; 00179 00180 // Insert a new node at construct with object, callstack and initial size. 00181 void 00182 __insert(const __object_t __obj, __stack_t __stack, std::size_t __num) 00183 { __add_object(__obj, __container_size_info(__stack, __num)); } 00184 00185 // XXX Undefined? 00186 void 00187 __construct(const void* __obj, std::size_t __inum); 00188 00189 // Call at destruction/clean to set container final size. 00190 void 00191 __destruct(const void* __obj, std::size_t __num, std::size_t __inum) 00192 { 00193 if (!__is_on()) 00194 return; 00195 00196 __object_t __obj_handle = static_cast<__object_t>(__obj); 00197 00198 __container_size_info* __object_info = __get_object_info(__obj_handle); 00199 if (!__object_info) 00200 return; 00201 00202 __object_info->__destruct(__num, __inum); 00203 __retire_object(__obj_handle); 00204 } 00205 00206 // Call at resize to set resize/cost information. 00207 void 00208 __resize(const void* __obj, int __from, int __to) 00209 { 00210 if (!__is_on()) 00211 return; 00212 00213 __container_size_info* __object_info = __get_object_info(__obj); 00214 if (!__object_info) 00215 return; 00216 00217 __object_info->__resize(__from, __to); 00218 } 00219 }; 00220 00221 } // namespace __gnu_profile 00222 #endif /* _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H */