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 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 // 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License along 21 // with this library; see the file COPYING3. If not see 22 // <http://www.gnu.org/licenses/>. 23 24 /** @file profile/impl/profiler_node.h 25 * @brief Data structures to represent a single profiling event. 26 */ 27 28 // Written by Lixia Liu and Silvius Rus. 29 30 #ifndef _GLIBCXX_PROFILE_PROFILER_NODE_H 31 #define _GLIBCXX_PROFILE_PROFILER_NODE_H 1 32 33 #include <cstdio> // FILE, fprintf 34 35 #include <vector> 36 #if defined _GLIBCXX_HAVE_EXECINFO_H 37 #include <execinfo.h> 38 #endif 39 40 namespace __gnu_profile 41 { 42 typedef const void* __object_t; 43 typedef void* __instruction_address_t; 44 typedef std::_GLIBCXX_STD_C::vector<__instruction_address_t> __stack_npt; 45 typedef __stack_npt* __stack_t; 46 47 std::size_t __stack_max_depth(); 48 49 inline __stack_t 50 __get_stack() 51 { 52 #if defined _GLIBCXX_HAVE_EXECINFO_H 53 std::size_t __max_depth = __stack_max_depth(); 54 if (__max_depth == 0) 55 return 0; 56 __stack_npt __buffer(__max_depth); 57 int __depth = backtrace(&__buffer[0], __max_depth); 58 __stack_t __stack = new __stack_npt(__depth); 59 __builtin_memcpy(&(*__stack)[0], &__buffer[0], 60 __depth * sizeof(__object_t)); 61 return __stack; 62 #else 63 return 0; 64 #endif 65 } 66 67 inline std::size_t 68 __size(__stack_t __stack) 69 { 70 if (!__stack) 71 return 0; 72 else 73 return __stack->size(); 74 } 75 76 // XXX 77 inline void 78 __write(FILE* __f, __stack_t __stack) 79 { 80 if (!__stack) 81 return; 82 83 __stack_npt::const_iterator __it; 84 for (__it = __stack->begin(); __it != __stack->end(); ++__it) 85 std::fprintf(__f, "%p ", *__it); 86 } 87 88 /** @brief Hash function for summary trace using call stack as index. */ 89 class __stack_hash 90 { 91 public: 92 std::size_t 93 operator()(__stack_t __s) const 94 { 95 if (!__s) 96 return 0; 97 98 std::size_t __index = 0; 99 __stack_npt::const_iterator __it; 100 for (__it = __s->begin(); __it != __s->end(); ++__it) 101 __index += reinterpret_cast<std::size_t>(*__it); 102 return __index; 103 } 104 105 bool operator() (__stack_t __stack1, __stack_t __stack2) const 106 { 107 if (!__stack1 && !__stack2) 108 return true; 109 if (!__stack1 || !__stack2) 110 return false; 111 if (__stack1->size() != __stack2->size()) 112 return false; 113 114 std::size_t __byte_size 115 = __stack1->size() * sizeof(__stack_npt::value_type); 116 return __builtin_memcmp(&(*__stack1)[0], &(*__stack2)[0], 117 __byte_size) == 0; 118 } 119 }; 120 121 122 /** @brief Base class for a line in the object table. */ 123 class __object_info_base 124 { 125 public: 126 __object_info_base() { } 127 128 __object_info_base(__stack_t __stack) 129 : _M_stack(__stack), _M_valid(true) { } 130 131 __object_info_base(const __object_info_base& __o) 132 : _M_stack(__o._M_stack), _M_valid(__o._M_valid) { } 133 134 virtual ~__object_info_base() { } 135 136 bool 137 __is_valid() const 138 { return _M_valid; } 139 140 __stack_t 141 __stack() const 142 { return _M_stack; } 143 144 virtual void __write(FILE* __f) const = 0; 145 146 protected: 147 __stack_t _M_stack; 148 bool _M_valid; 149 }; 150 151 152 /** @brief Base class for a line in the stack table. */ 153 template<typename __object_info> 154 class __stack_info_base 155 { 156 public: 157 __stack_info_base() { } 158 __stack_info_base(const __object_info& __info) = 0; 159 virtual ~__stack_info_base() {} 160 void __merge(const __object_info& __info) = 0; 161 virtual float __magnitude() const = 0; 162 virtual const char* __get_id() const = 0; 163 }; 164 165 } // namespace __gnu_profile 166 #endif /* _GLIBCXX_PROFILE_PROFILER_NODE_H */ 167
