1 // -*- C++ -*- 2 // 3 // Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the terms 7 // of the GNU General Public License as published by the Free Software 8 // Foundation; either version 2, or (at your option) any later 9 // version. 10 11 // This library is distributed in the hope that it will be useful, but 12 // WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 // General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License 17 // along with this library; see the file COPYING. If not, write to 18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19 // MA 02111-1307, USA. 20 21 // As a special exception, you may use this file as part of a free 22 // software library without restriction. Specifically, if other files 23 // instantiate templates or use macros or inline functions from this 24 // file, or you compile this file and link it with other files to 25 // produce an executable, this file does not by itself cause the 26 // resulting executable to be covered by the GNU General Public 27 // License. This exception does not however invalidate any other 28 // reasons why the executable file might be covered by the GNU General 29 // Public License. 30 31 /** @file profile/impl/profiler_hash_func.h 32 * @brief Data structures to represent profiling traces. 33 */ 34 35 // Written by Lixia Liu and Silvius Rus. 36 37 #ifndef _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H 38 #define _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H 1 39 40 #include "profile/impl/profiler.h" 41 #include "profile/impl/profiler_node.h" 42 #include "profile/impl/profiler_trace.h" 43 44 namespace __gnu_profile 45 { 46 /** @brief A hash performance instrumentation line in the object table. */ 47 class __hashfunc_info 48 : public __object_info_base 49 { 50 public: 51 __hashfunc_info() 52 : _M_longest_chain(0), _M_accesses(0), _M_hops(0) { } 53 54 __hashfunc_info(const __hashfunc_info& __o) 55 : __object_info_base(__o), _M_longest_chain(__o._M_longest_chain), 56 _M_accesses(__o._M_accesses), _M_hops(__o._M_hops) { } 57 58 __hashfunc_info(__stack_t __stack) 59 : __object_info_base(__stack), _M_longest_chain(0), 60 _M_accesses(0), _M_hops(0) { } 61 62 virtual ~__hashfunc_info() { } 63 64 void 65 __merge(const __hashfunc_info& __o) 66 { 67 _M_longest_chain = std::max(_M_longest_chain, __o._M_longest_chain); 68 _M_accesses += __o._M_accesses; 69 _M_hops += __o._M_hops; 70 } 71 72 void 73 __destruct(std::size_t __chain, std::size_t __accesses, 74 std::size_t __hops) 75 { 76 _M_longest_chain = std::max(_M_longest_chain, __chain); 77 _M_accesses += __accesses; 78 _M_hops += __hops; 79 } 80 81 void 82 __write(FILE* __f) const 83 { std::fprintf(__f, "%Zu %Zu %Zu\n", _M_hops, 84 _M_accesses, _M_longest_chain); } 85 86 float 87 __magnitude() const 88 { return static_cast<float>(_M_hops); } 89 90 std::string 91 __advice() const 92 { return "change hash function"; } 93 94 private: 95 std::size_t _M_longest_chain; 96 std::size_t _M_accesses; 97 std::size_t _M_hops; 98 }; 99 100 101 /** @brief A hash performance instrumentation line in the stack table. */ 102 class __hashfunc_stack_info 103 : public __hashfunc_info 104 { 105 public: 106 __hashfunc_stack_info(const __hashfunc_info& __o) 107 : __hashfunc_info(__o) { } 108 }; 109 110 111 /** @brief Hash performance instrumentation producer. */ 112 class __trace_hash_func 113 : public __trace_base<__hashfunc_info, __hashfunc_stack_info> 114 { 115 public: 116 __trace_hash_func() 117 : __trace_base<__hashfunc_info, __hashfunc_stack_info>() 118 { __id = "hash-distr"; } 119 120 ~__trace_hash_func() {} 121 122 // Insert a new node at construct with object, callstack and initial size. 123 void 124 __insert(__object_t __obj, __stack_t __stack) 125 { __add_object(__obj, __hashfunc_info(__stack)); } 126 127 // Call at destruction/clean to set container final size. 128 void 129 __destruct(const void* __obj, std::size_t __chain, 130 std::size_t __accesses, std::size_t __hops) 131 { 132 if (!__is_on()) 133 return; 134 135 // First find the item from the live objects and update the informations. 136 __hashfunc_info* __objs = __get_object_info(__obj); 137 if (!__objs) 138 return; 139 140 __objs->__destruct(__chain, __accesses, __hops); 141 __retire_object(__obj); 142 } 143 }; 144 145 146 inline void 147 __trace_hash_func_init() 148 { _GLIBCXX_PROFILE_DATA(_S_hash_func) = new __trace_hash_func(); } 149 150 inline void 151 __trace_hash_func_report(FILE* __f, __warning_vector_t& __warnings) 152 { 153 if (_GLIBCXX_PROFILE_DATA(_S_hash_func)) 154 { 155 _GLIBCXX_PROFILE_DATA(_S_hash_func)->__collect_warnings(__warnings); 156 _GLIBCXX_PROFILE_DATA(_S_hash_func)->__write(__f); 157 } 158 } 159 160 inline void 161 __trace_hash_func_construct(const void* __obj) 162 { 163 if (!__profcxx_init()) 164 return; 165 166 _GLIBCXX_PROFILE_DATA(_S_hash_func)->__insert(__obj, __get_stack()); 167 } 168 169 inline void 170 __trace_hash_func_destruct(const void* __obj, std::size_t __chain, 171 std::size_t __accesses, std::size_t __hops) 172 { 173 if (!__profcxx_init()) 174 return; 175 176 _GLIBCXX_PROFILE_DATA(_S_hash_func)->__destruct(__obj, __chain, 177 __accesses, __hops); 178 } 179 180 } // namespace __gnu_profile 181 #endif /* _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H */ 182
