libstdc++
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00001 // -*- C++ -*- 00002 // 00003 // Copyright (C) 2009-2015 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(__stack_t __stack) 00047 : __object_info_base(__stack), _M_init(0), _M_max(0), 00048 _M_min(0), _M_total(0), _M_item_min(0), _M_item_max(0), 00049 _M_item_total(0), _M_count(0), _M_resize(0), _M_cost(0) 00050 { } 00051 00052 void 00053 __write(FILE* __f) const 00054 { 00055 std::fprintf(__f, "%Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu\n", 00056 _M_init, _M_count, _M_cost, _M_resize, _M_min, _M_max, 00057 _M_total, _M_item_min, _M_item_max, _M_item_total); 00058 } 00059 00060 float 00061 __magnitude() const 00062 { return static_cast<float>(_M_cost); } 00063 00064 std::string 00065 __advice() const 00066 { 00067 std::stringstream __message; 00068 if (_M_init < _M_item_max) 00069 __message << "change initial container size from " << _M_init 00070 << " to " << _M_item_max; 00071 return __message.str(); 00072 } 00073 00074 void 00075 __init(std::size_t __num) 00076 { 00077 _M_init = __num; 00078 _M_max = __num; 00079 } 00080 00081 void 00082 __merge(const __container_size_info& __o) 00083 { 00084 __object_info_base::__merge(__o); 00085 _M_init = std::max(_M_init, __o._M_init); 00086 _M_max = std::max(_M_max, __o._M_max); 00087 _M_item_max = std::max(_M_item_max, __o._M_item_max); 00088 _M_min = std::min(_M_min, __o._M_min); 00089 _M_item_min = std::min(_M_item_min, __o._M_item_min); 00090 _M_total += __o._M_total; 00091 _M_item_total += __o._M_item_total; 00092 _M_count += __o._M_count; 00093 _M_cost += __o._M_cost; 00094 _M_resize += __o._M_resize; 00095 } 00096 00097 // Call if a container is destructed or cleaned. 00098 void 00099 __destruct(std::size_t __num, std::size_t __inum) 00100 { 00101 _M_max = std::max(_M_max, __num); 00102 _M_item_max = std::max(_M_item_max, __inum); 00103 if (_M_min == 0) 00104 { 00105 _M_min = __num; 00106 _M_item_min = __inum; 00107 } 00108 else 00109 { 00110 _M_min = std::min(_M_min, __num); 00111 _M_item_min = std::min(_M_item_min, __inum); 00112 } 00113 00114 _M_total += __num; 00115 _M_item_total += __inum; 00116 _M_count += 1; 00117 } 00118 00119 // Estimate the cost of resize/rehash. 00120 float 00121 __resize_cost(std::size_t __from, std::size_t) 00122 { return __from; } 00123 00124 // Call if container is resized. 00125 void 00126 __resize(std::size_t __from, std::size_t __to) 00127 { 00128 _M_cost += this->__resize_cost(__from, __to); 00129 _M_resize += 1; 00130 _M_max = std::max(_M_max, __to); 00131 } 00132 00133 private: 00134 std::size_t _M_init; 00135 std::size_t _M_max; // range of # buckets 00136 std::size_t _M_min; 00137 std::size_t _M_total; 00138 std::size_t _M_item_min; // range of # items 00139 std::size_t _M_item_max; 00140 std::size_t _M_item_total; 00141 std::size_t _M_count; 00142 std::size_t _M_resize; 00143 std::size_t _M_cost; 00144 }; 00145 00146 /** @brief A container size instrumentation line in the stack table. */ 00147 class __container_size_stack_info 00148 : public __container_size_info 00149 { 00150 public: 00151 __container_size_stack_info(const __container_size_info& __o) 00152 : __container_size_info(__o) { } 00153 }; 00154 00155 /** @brief Container size instrumentation trace producer. */ 00156 class __trace_container_size 00157 : public __trace_base<__container_size_info, __container_size_stack_info> 00158 { 00159 public: 00160 ~__trace_container_size() { } 00161 00162 __trace_container_size() 00163 : __trace_base<__container_size_info, __container_size_stack_info>() { }; 00164 00165 // Insert a new node at construct with object, callstack and initial size. 00166 __container_size_info* 00167 __insert(__stack_t __stack, std::size_t __num) 00168 { 00169 __container_size_info* __ret = __add_object(__stack); 00170 if (__ret) 00171 __ret->__init(__num); 00172 return __ret; 00173 } 00174 00175 // Call at destruction/clean to set container final size. 00176 void 00177 __destruct(__container_size_info* __obj_info, 00178 std::size_t __num, std::size_t __inum) 00179 { 00180 __obj_info->__destruct(__num, __inum); 00181 __retire_object(__obj_info); 00182 } 00183 }; 00184 00185 } // namespace __gnu_profile 00186 #endif /* _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H */