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 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 // 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License along 00021 // with this library; see the file COPYING3. If not see 00022 // <http://www.gnu.org/licenses/>. 00023 00024 /** @file profile/impl/profiler_container_size.h 00025 * @brief Diagnostics for container sizes. 00026 */ 00027 00028 // Written by Lixia Liu and Silvius Rus. 00029 00030 #ifndef _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H 00031 #define _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H 1 00032 00033 #include <sstream> 00034 00035 #include "profile/impl/profiler.h" 00036 #include "profile/impl/profiler_node.h" 00037 #include "profile/impl/profiler_trace.h" 00038 00039 namespace __gnu_profile 00040 { 00041 /** @brief A container size instrumentation line in the object table. */ 00042 class __container_size_info 00043 : public __object_info_base 00044 { 00045 public: 00046 __container_size_info() 00047 : _M_init(0), _M_max(0), _M_min(0), _M_total(0), _M_item_min(0), 00048 _M_item_max(0), _M_item_total(0), _M_count(0), _M_resize(0), _M_cost(0) 00049 { } 00050 00051 __container_size_info(const __container_size_info& __o) 00052 : __object_info_base(__o), _M_init(__o._M_init), _M_max(__o._M_max), 00053 _M_min(__o._M_min), _M_total(__o._M_total), 00054 _M_item_min(__o._M_item_min), _M_item_max(__o._M_item_max), 00055 _M_item_total(__o._M_item_total), _M_count(__o._M_count), 00056 _M_resize(__o._M_resize), _M_cost(__o._M_cost) 00057 { } 00058 00059 __container_size_info(__stack_t __stack, std::size_t __num) 00060 : __object_info_base(__stack), _M_init(__num), _M_max(__num), 00061 _M_min(0), _M_total(0), _M_item_min(0), _M_item_max(0), 00062 _M_item_total(0), _M_count(0), _M_resize(0), _M_cost(0) 00063 { } 00064 00065 virtual ~__container_size_info() { } 00066 00067 void 00068 __write(FILE* __f) const 00069 { 00070 std::fprintf(__f, "%Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu\n", 00071 _M_init, _M_count, _M_cost, _M_resize, _M_min, _M_max, 00072 _M_total, _M_item_min, _M_item_max, _M_item_total); 00073 } 00074 00075 float 00076 __magnitude() const 00077 { return static_cast<float>(_M_cost); } 00078 00079 std::string 00080 __advice() const 00081 { 00082 std::stringstream __message; 00083 if (_M_init < _M_item_max) 00084 __message << "change initial container size from " << _M_init 00085 << " to " << _M_item_max; 00086 return __message.str(); 00087 } 00088 00089 void 00090 __merge(const __container_size_info& __o) 00091 { 00092 _M_init = std::max(_M_init, __o._M_init); 00093 _M_max = std::max(_M_max, __o._M_max); 00094 _M_item_max = std::max(_M_item_max, __o._M_item_max); 00095 _M_min = std::min(_M_min, __o._M_min); 00096 _M_item_min = std::min(_M_item_min, __o._M_item_min); 00097 _M_total += __o._M_total; 00098 _M_item_total += __o._M_item_total; 00099 _M_count += __o._M_count; 00100 _M_cost += __o._M_cost; 00101 _M_resize += __o._M_resize; 00102 } 00103 00104 // Call if a container is destructed or cleaned. 00105 void 00106 __destruct(std::size_t __num, std::size_t __inum) 00107 { 00108 _M_max = std::max(_M_max, __num); 00109 _M_item_max = std::max(_M_item_max, __inum); 00110 if (_M_min == 0) 00111 { 00112 _M_min = __num; 00113 _M_item_min = __inum; 00114 } 00115 else 00116 { 00117 _M_min = std::min(_M_min, __num); 00118 _M_item_min = std::min(_M_item_min, __inum); 00119 } 00120 _M_total += __num; 00121 _M_item_total += __inum; 00122 _M_count += 1; 00123 } 00124 00125 // Estimate the cost of resize/rehash. 00126 float 00127 __resize_cost(std::size_t __from, std::size_t) 00128 { return __from; } 00129 00130 // Call if container is resized. 00131 void 00132 __resize(std::size_t __from, std::size_t __to) 00133 { 00134 _M_cost += this->__resize_cost(__from, __to); 00135 _M_resize += 1; 00136 _M_max = std::max(_M_max, __to); 00137 } 00138 00139 private: 00140 std::size_t _M_init; 00141 std::size_t _M_max; // range of # buckets 00142 std::size_t _M_min; 00143 std::size_t _M_total; 00144 std::size_t _M_item_min; // range of # items 00145 std::size_t _M_item_max; 00146 std::size_t _M_item_total; 00147 std::size_t _M_count; 00148 std::size_t _M_resize; 00149 std::size_t _M_cost; 00150 }; 00151 00152 00153 /** @brief A container size instrumentation line in the stack table. */ 00154 class __container_size_stack_info 00155 : public __container_size_info 00156 { 00157 public: 00158 __container_size_stack_info(const __container_size_info& __o) 00159 : __container_size_info(__o) { } 00160 }; 00161 00162 00163 /** @brief Container size instrumentation trace producer. */ 00164 class __trace_container_size 00165 : public __trace_base<__container_size_info, __container_size_stack_info> 00166 { 00167 public: 00168 ~__trace_container_size() { } 00169 00170 __trace_container_size() 00171 : __trace_base<__container_size_info, __container_size_stack_info>() { }; 00172 00173 // Insert a new node at construct with object, callstack and initial size. 00174 void 00175 __insert(const __object_t __obj, __stack_t __stack, std::size_t __num) 00176 { __add_object(__obj, __container_size_info(__stack, __num)); } 00177 00178 // XXX Undefined? 00179 void 00180 __construct(const void* __obj, std::size_t __inum); 00181 00182 // Call at destruction/clean to set container final size. 00183 void 00184 __destruct(const void* __obj, std::size_t __num, std::size_t __inum) 00185 { 00186 if (!__is_on()) 00187 return; 00188 00189 __object_t __obj_handle = static_cast<__object_t>(__obj); 00190 00191 __container_size_info* __object_info = __get_object_info(__obj_handle); 00192 if (!__object_info) 00193 return; 00194 00195 __object_info->__destruct(__num, __inum); 00196 __retire_object(__obj_handle); 00197 } 00198 00199 // Call at resize to set resize/cost information. 00200 void 00201 __resize(const void* __obj, int __from, int __to) 00202 { 00203 if (!__is_on()) 00204 return; 00205 00206 __container_size_info* __object_info = __get_object_info(__obj); 00207 if (!__object_info) 00208 return; 00209 00210 __object_info->__resize(__from, __to); 00211 } 00212 }; 00213 00214 } // namespace __gnu_profile 00215 #endif /* _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H */