libstdc++
|
00001 // -*- C++ -*- 00002 // 00003 // Copyright (C) 2009, 2010 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_node.h 00032 * @brief Data structures to represent a single profiling event. 00033 */ 00034 00035 // Written by Lixia Liu and Silvius Rus. 00036 00037 #ifndef _GLIBCXX_PROFILE_PROFILER_NODE_H 00038 #define _GLIBCXX_PROFILE_PROFILER_NODE_H 1 00039 00040 #include <cstdio> // FILE, fprintf 00041 00042 #include <vector> 00043 #if defined _GLIBCXX_HAVE_EXECINFO_H 00044 #include <execinfo.h> 00045 #endif 00046 00047 namespace __gnu_profile 00048 { 00049 typedef const void* __object_t; 00050 typedef void* __instruction_address_t; 00051 typedef std::_GLIBCXX_STD_C::vector<__instruction_address_t> __stack_npt; 00052 typedef __stack_npt* __stack_t; 00053 00054 std::size_t __stack_max_depth(); 00055 00056 inline __stack_t 00057 __get_stack() 00058 { 00059 #if defined _GLIBCXX_HAVE_EXECINFO_H 00060 std::size_t __max_depth = __stack_max_depth(); 00061 if (__max_depth == 0) 00062 return 0; 00063 __stack_npt __buffer(__max_depth); 00064 int __depth = backtrace(&__buffer[0], __max_depth); 00065 __stack_t __stack = new __stack_npt(__depth); 00066 __builtin_memcpy(&(*__stack)[0], &__buffer[0], 00067 __depth * sizeof(__object_t)); 00068 return __stack; 00069 #else 00070 return 0; 00071 #endif 00072 } 00073 00074 inline std::size_t 00075 __size(__stack_t __stack) 00076 { 00077 if (!__stack) 00078 return 0; 00079 else 00080 return __stack->size(); 00081 } 00082 00083 // XXX 00084 inline void 00085 __write(FILE* __f, __stack_t __stack) 00086 { 00087 if (!__stack) 00088 return; 00089 00090 __stack_npt::const_iterator __it; 00091 for (__it = __stack->begin(); __it != __stack->end(); ++__it) 00092 std::fprintf(__f, "%p ", *__it); 00093 } 00094 00095 /** @brief Hash function for summary trace using call stack as index. */ 00096 class __stack_hash 00097 { 00098 public: 00099 std::size_t 00100 operator()(__stack_t __s) const 00101 { 00102 if (!__s) 00103 return 0; 00104 00105 __UINTPTR_TYPE__ __index = 0; 00106 __stack_npt::const_iterator __it; 00107 for (__it = __s->begin(); __it != __s->end(); ++__it) 00108 __index += reinterpret_cast<__UINTPTR_TYPE__>(*__it); 00109 return __index; 00110 } 00111 00112 bool operator() (__stack_t __stack1, __stack_t __stack2) const 00113 { 00114 if (!__stack1 && !__stack2) 00115 return true; 00116 if (!__stack1 || !__stack2) 00117 return false; 00118 if (__stack1->size() != __stack2->size()) 00119 return false; 00120 00121 std::size_t __byte_size 00122 = __stack1->size() * sizeof(__stack_npt::value_type); 00123 return __builtin_memcmp(&(*__stack1)[0], &(*__stack2)[0], 00124 __byte_size) == 0; 00125 } 00126 }; 00127 00128 00129 /** @brief Base class for a line in the object table. */ 00130 class __object_info_base 00131 { 00132 public: 00133 __object_info_base() { } 00134 00135 __object_info_base(__stack_t __stack) 00136 : _M_stack(__stack), _M_valid(true) { } 00137 00138 __object_info_base(const __object_info_base& __o) 00139 : _M_stack(__o._M_stack), _M_valid(__o._M_valid) { } 00140 00141 virtual ~__object_info_base() { } 00142 00143 bool 00144 __is_valid() const 00145 { return _M_valid; } 00146 00147 __stack_t 00148 __stack() const 00149 { return _M_stack; } 00150 00151 virtual void __write(FILE* __f) const = 0; 00152 00153 protected: 00154 __stack_t _M_stack; 00155 bool _M_valid; 00156 }; 00157 00158 00159 /** @brief Base class for a line in the stack table. */ 00160 template<typename __object_info> 00161 class __stack_info_base 00162 { 00163 public: 00164 __stack_info_base() { } 00165 __stack_info_base(const __object_info& __info) = 0; 00166 virtual ~__stack_info_base() {} 00167 void __merge(const __object_info& __info) = 0; 00168 virtual float __magnitude() const = 0; 00169 virtual const char* __get_id() const = 0; 00170 }; 00171 00172 } // namespace __gnu_profile 00173 #endif /* _GLIBCXX_PROFILE_PROFILER_NODE_H */