1 | /* |
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2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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3 | * > www.orxonox.net < |
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4 | * |
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5 | * |
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6 | * License notice: |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU General Public License |
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10 | * as published by the Free Software Foundation; either version 2 |
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11 | * of the License, or (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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21 | * |
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22 | * Author: |
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23 | * Christoph Renner |
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24 | * Co-authors: |
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25 | * ... |
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26 | * |
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27 | */ |
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28 | |
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29 | /** |
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30 | @file |
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31 | @brief Implementation of the SignalHandler class. |
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32 | */ |
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33 | |
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34 | #include "SignalHandler.h" |
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35 | |
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36 | #include <iostream> |
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37 | #include <cstdlib> |
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38 | #include <cstring> |
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39 | |
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40 | #include "Debug.h" |
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41 | |
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42 | namespace orxonox |
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43 | { |
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44 | SignalHandler* SignalHandler::singletonPtr_s = NULL; |
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45 | } |
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46 | |
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47 | #if defined(ORXONOX_PLATFORM_LINUX) |
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48 | |
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49 | #include <wait.h> |
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50 | #include <X11/Xlib.h> |
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51 | #include <X11/Xutil.h> |
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52 | #include <X11/keysym.h> |
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53 | |
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54 | namespace orxonox |
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55 | { |
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56 | /** |
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57 | * register signal handlers for SIGSEGV and SIGABRT |
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58 | * @param appName path to executable eg argv[0] |
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59 | * @param filename filename to append backtrace to |
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60 | */ |
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61 | void SignalHandler::doCatch( const std::string & appName, const std::string & filename ) |
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62 | { |
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63 | this->appName = appName; |
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64 | this->filename = filename; |
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65 | |
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66 | // make sure doCatch is only called once without calling dontCatch |
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67 | assert( sigRecList.size() == 0 ); |
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68 | |
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69 | catchSignal( SIGSEGV ); |
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70 | catchSignal( SIGABRT ); |
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71 | catchSignal( SIGILL ); |
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72 | } |
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73 | |
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74 | /** |
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75 | * restore previous signal handlers |
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76 | */ |
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77 | void SignalHandler::dontCatch() |
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78 | { |
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79 | for ( SignalRecList::iterator it = sigRecList.begin(); it != sigRecList.end(); it++ ) |
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80 | { |
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81 | signal( it->signal, it->handler ); |
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82 | } |
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83 | |
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84 | sigRecList.clear(); |
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85 | } |
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86 | |
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87 | /** |
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88 | * catch signal sig |
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89 | * @param sig signal to catch |
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90 | */ |
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91 | void SignalHandler::catchSignal( int sig ) |
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92 | { |
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93 | sig_t handler = signal( sig, SignalHandler::sigHandler ); |
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94 | |
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95 | assert( handler != SIG_ERR ); |
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96 | |
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97 | SignalRec rec; |
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98 | rec.signal = sig; |
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99 | rec.handler = handler; |
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100 | |
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101 | sigRecList.push_front( rec ); |
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102 | } |
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103 | |
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104 | /** |
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105 | * sigHandler is called when receiving signals |
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106 | * @param sig |
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107 | */ |
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108 | void SignalHandler::sigHandler( int sig ) |
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109 | { |
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110 | std::string sigName = "UNKNOWN"; |
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111 | |
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112 | switch ( sig ) |
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113 | { |
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114 | case SIGSEGV: |
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115 | sigName = "SIGSEGV"; |
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116 | break; |
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117 | case SIGABRT: |
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118 | sigName = "SIGABRT"; |
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119 | break; |
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120 | case SIGILL: |
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121 | sigName = "SIGILL"; |
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122 | break; |
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123 | } |
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124 | // if the signalhandler has already been destroyed then don't do anything |
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125 | if( SignalHandler::singletonPtr_s == 0 ) |
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126 | { |
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127 | COUT(0) << "Received signal " << sigName.c_str() << std::endl << "Can't write backtrace because SignalHandler is already destroyed" << std::endl; |
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128 | exit(EXIT_FAILURE); |
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129 | } |
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130 | |
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131 | for ( SignalCallbackList::iterator it = SignalHandler::getInstance().callbackList.begin(); it != SignalHandler::getInstance().callbackList.end(); it++ ) |
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132 | { |
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133 | (*(it->cb))( it->someData ); |
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134 | } |
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135 | |
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136 | |
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137 | COUT(0) << "Received signal " << sigName.c_str() << std::endl << "Try to write backtrace to file orxonox_crash.log" << std::endl; |
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138 | |
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139 | int sigPipe[2]; |
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140 | if ( pipe(sigPipe) == -1 ) |
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141 | { |
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142 | perror("pipe failed!\n"); |
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143 | exit(EXIT_FAILURE); |
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144 | } |
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145 | |
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146 | int sigPid = fork(); |
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147 | |
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148 | if ( sigPid == -1 ) |
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149 | { |
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150 | perror("fork failed!\n"); |
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151 | exit(EXIT_FAILURE); |
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152 | } |
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153 | |
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154 | // gdb will be attached to this process |
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155 | if ( sigPid == 0 ) |
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156 | { |
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157 | getInstance().dontCatch(); |
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158 | // wait for message from parent when it has attached gdb |
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159 | int someData; |
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160 | |
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161 | read( sigPipe[0], &someData, sizeof(someData) ); |
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162 | |
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163 | if ( someData != 0x12345678 ) |
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164 | { |
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165 | COUT(0) << "something went wrong :(" << std::endl; |
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166 | } |
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167 | |
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168 | return; |
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169 | } |
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170 | |
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171 | int gdbIn[2]; |
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172 | int gdbOut[2]; |
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173 | int gdbErr[2]; |
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174 | |
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175 | if ( pipe(gdbIn) == -1 || pipe(gdbOut) == -1 || pipe(gdbErr) == -1 ) |
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176 | { |
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177 | perror("pipe failed!\n"); |
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178 | kill( sigPid, SIGTERM ); |
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179 | waitpid( sigPid, NULL, 0 ); |
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180 | exit(EXIT_FAILURE); |
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181 | } |
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182 | |
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183 | int gdbPid = fork(); |
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184 | // this process will run gdb |
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185 | |
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186 | if ( gdbPid == -1 ) |
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187 | { |
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188 | perror("fork failed\n"); |
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189 | kill( sigPid, SIGTERM ); |
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190 | waitpid( sigPid, NULL, 0 ); |
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191 | exit(EXIT_FAILURE); |
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192 | } |
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193 | |
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194 | if ( gdbPid == 0 ) |
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195 | { |
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196 | // start gdb |
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197 | |
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198 | close(gdbIn[1]); |
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199 | close(gdbOut[0]); |
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200 | close(gdbErr[0]); |
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201 | |
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202 | dup2( gdbIn[0], STDIN_FILENO ); |
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203 | dup2( gdbOut[1], STDOUT_FILENO ); |
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204 | dup2( gdbErr[1], STDERR_FILENO ); |
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205 | |
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206 | execlp( "sh", "sh", "-c", "gdb", static_cast<void*>(NULL)); |
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207 | } |
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208 | |
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209 | char cmd[256]; |
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210 | snprintf( cmd, 256, "file %s\nattach %d\nc\n", getInstance().appName.c_str(), sigPid ); |
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211 | write( gdbIn[1], cmd, strlen(cmd) ); |
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212 | |
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213 | int charsFound = 0; |
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214 | int promptFound = 0; |
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215 | char byte; |
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216 | while ( read( gdbOut[0], &byte, 1 ) == 1 ) |
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217 | { |
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218 | if ( |
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219 | (charsFound == 0 && byte == '(') || |
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220 | (charsFound == 1 && byte == 'g') || |
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221 | (charsFound == 2 && byte == 'd') || |
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222 | (charsFound == 3 && byte == 'b') || |
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223 | (charsFound == 4 && byte == ')') || |
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224 | (charsFound == 5 && byte == ' ') |
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225 | ) |
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226 | charsFound++; |
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227 | else |
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228 | charsFound = 0; |
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229 | |
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230 | if ( charsFound == 6 ) |
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231 | { |
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232 | promptFound++; |
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233 | charsFound = 0; |
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234 | } |
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235 | |
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236 | if ( promptFound == 3 ) |
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237 | { |
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238 | break; |
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239 | } |
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240 | } |
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241 | |
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242 | int someData = 0x12345678; |
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243 | write( sigPipe[1], &someData, sizeof(someData) ); |
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244 | |
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245 | write( gdbIn[1], "bt\nk\nq\n", 7 ); |
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246 | |
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247 | |
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248 | charsFound = 0; |
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249 | promptFound = 0; |
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250 | std::string bt; |
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251 | while ( read( gdbOut[0], &byte, 1 ) == 1 ) |
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252 | { |
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253 | bt += std::string( &byte, 1 ); |
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254 | |
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255 | if ( |
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256 | (charsFound == 0 && byte == '(') || |
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257 | (charsFound == 1 && byte == 'g') || |
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258 | (charsFound == 2 && byte == 'd') || |
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259 | (charsFound == 3 && byte == 'b') || |
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260 | (charsFound == 4 && byte == ')') || |
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261 | (charsFound == 5 && byte == ' ') |
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262 | ) |
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263 | charsFound++; |
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264 | else |
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265 | charsFound = 0; |
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266 | |
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267 | if ( charsFound == 6 ) |
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268 | { |
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269 | promptFound++; |
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270 | charsFound = 0; |
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271 | bt += "\n"; |
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272 | } |
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273 | |
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274 | if ( promptFound == 3 ) |
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275 | { |
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276 | break; |
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277 | } |
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278 | } |
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279 | |
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280 | |
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281 | waitpid( sigPid, NULL, 0 ); |
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282 | waitpid( gdbPid, NULL, 0 ); |
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283 | |
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284 | int wsRemoved = 0; |
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285 | |
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286 | while ( wsRemoved < 2 && bt.length() > 0 ) |
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287 | { |
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288 | if ( bt[1] == '\n' ) |
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289 | wsRemoved++; |
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290 | bt.erase(0, 1); |
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291 | } |
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292 | |
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293 | if ( bt.length() > 0 ) |
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294 | bt.erase(0, 1); |
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295 | |
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296 | time_t now = time(NULL); |
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297 | |
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298 | std::string timeString = |
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299 | "=======================================================\n" |
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300 | "= time: " + std::string(ctime(&now)) + |
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301 | "=======================================================\n"; |
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302 | bt.insert(0, timeString); |
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303 | |
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304 | FILE * f = fopen( getInstance().filename.c_str(), "w" ); |
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305 | |
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306 | if ( !f ) |
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307 | { |
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308 | perror( ( std::string( "could not append to " ) + getInstance().filename ).c_str() ); |
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309 | exit(EXIT_FAILURE); |
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310 | } |
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311 | |
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312 | if ( fwrite( bt.c_str(), 1, bt.length(), f ) != bt.length() ) |
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313 | { |
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314 | COUT(0) << "could not write " << bt.length() << " byte to " << getInstance().filename << std::endl; |
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315 | exit(EXIT_FAILURE); |
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316 | } |
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317 | |
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318 | exit(EXIT_FAILURE); |
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319 | } |
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320 | |
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321 | void SignalHandler::registerCallback( SignalCallback cb, void * someData ) |
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322 | { |
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323 | SignalCallbackRec rec; |
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324 | rec.cb = cb; |
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325 | rec.someData = someData; |
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326 | |
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327 | callbackList.push_back(rec); |
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328 | } |
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329 | } |
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330 | |
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331 | #elif defined(ORXONOX_PLATFORM_WINDOWS) && defined(DBGHELP_FOUND) |
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332 | |
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333 | #include <iostream> |
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334 | #include <iomanip> |
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335 | #include <fstream> |
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336 | #include <ctime> |
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337 | #include <dbghelp.h> |
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338 | #include <tlhelp32.h> |
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339 | |
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340 | #include "Convert.h" |
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341 | |
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342 | #ifdef ORXONOX_COMPILER_GCC |
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343 | # include <cxxabi.h> |
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344 | #endif |
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345 | |
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346 | #ifdef ORXONOX_COMPILER_GCC |
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347 | /// Overwrite the original abort() function in MinGW to enable a break point. |
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348 | _UtilExport void __cdecl abort() |
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349 | { |
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350 | COUT(1) << "This application has requested the Runtime to terminate it in an unusual way." << std::endl; |
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351 | COUT(1) << "Please contact the application's support team for more information." << std::endl; |
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352 | DebugBreak(); |
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353 | exit(0x3); |
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354 | } |
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355 | |
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356 | /// Overwrite the original _abort() function in MinGW to enable a break point. |
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357 | _UtilExport void __cdecl _assert(const char* expression, const char* file, int line) |
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358 | { |
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359 | COUT(1) << "Assertion failed: " << expression << ", file " << file << ", line " << line << std::endl; |
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360 | COUT(1) << std::endl; |
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361 | abort(); |
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362 | } |
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363 | #endif |
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364 | |
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365 | namespace orxonox |
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366 | { |
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367 | /// Constructor: Initializes the values, but doesn't register the exception handler. |
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368 | SignalHandler::SignalHandler() |
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369 | { |
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370 | this->prevExceptionFilter_ = NULL; |
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371 | } |
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372 | |
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373 | /// Destructor: Removes the exception handler. |
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374 | SignalHandler::~SignalHandler() |
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375 | { |
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376 | if (this->prevExceptionFilter_ != NULL) |
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377 | { |
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378 | // Remove the unhandled exception filter function |
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379 | SetUnhandledExceptionFilter(this->prevExceptionFilter_); |
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380 | this->prevExceptionFilter_ = NULL; |
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381 | } |
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382 | } |
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383 | |
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384 | /// Registers an exception handler and initializes the filename of the crash log. |
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385 | void SignalHandler::doCatch(const std::string&, const std::string& filename) |
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386 | { |
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387 | this->filename_ = filename; |
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388 | |
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389 | // don't register twice |
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390 | assert(this->prevExceptionFilter_ == NULL); |
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391 | |
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392 | if (this->prevExceptionFilter_ == NULL) |
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393 | { |
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394 | // Install the unhandled exception filter function |
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395 | this->prevExceptionFilter_ = SetUnhandledExceptionFilter(&SignalHandler::exceptionFilter); |
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396 | } |
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397 | } |
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398 | |
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399 | /// Exception handler: Will be called by Windows if an unhandled exceptions occurs. |
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400 | /* static */ LONG WINAPI SignalHandler::exceptionFilter(PEXCEPTION_POINTERS pExceptionInfo) |
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401 | { |
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402 | // avoid loops |
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403 | static bool bExecuting = false; |
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404 | |
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405 | if (!bExecuting) |
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406 | { |
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407 | bExecuting = true; |
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408 | |
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409 | COUT(1) << std::endl; |
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410 | |
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411 | // if the signalhandler has already been destroyed then don't do anything |
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412 | if (SignalHandler::singletonPtr_s == 0) |
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413 | { |
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414 | COUT(1) << "Caught an unhandled exception" << std::endl << "Can't write backtrace because SignalHandler is already destroyed" << std::endl; |
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415 | exit(EXIT_FAILURE); |
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416 | } |
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417 | |
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418 | COUT(1) << "Caught an unhandled exception" << std::endl << "Try to write backtrace to orxonox_crash.log..." << std::endl; |
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419 | |
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420 | // write the crash log |
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421 | std::ofstream crashlog(SignalHandler::getInstance().filename_.c_str()); |
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422 | |
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423 | time_t now = time(NULL); |
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424 | |
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425 | crashlog << "=======================================================" << std::endl; |
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426 | crashlog << "= Time: " << std::string(ctime(&now)); |
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427 | crashlog << "=======================================================" << std::endl; |
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428 | crashlog << std::endl; |
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429 | |
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430 | const std::string& error = SignalHandler::getExceptionType(pExceptionInfo); |
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431 | |
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432 | crashlog << error << std::endl; |
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433 | crashlog << std::endl; |
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434 | |
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435 | const std::string& callstack = SignalHandler::getStackTrace(pExceptionInfo); |
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436 | |
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437 | crashlog << "Call stack:" << std::endl; |
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438 | crashlog << callstack << std::endl; |
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439 | |
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440 | crashlog.close(); |
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441 | |
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442 | // print the same information also to the console |
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443 | COUT(1) << std::endl; |
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444 | COUT(1) << error << std::endl; |
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445 | COUT(1) << std::endl; |
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446 | COUT(1) << "Call stack:" << std::endl; |
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447 | COUT(1) << callstack << std::endl; |
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448 | |
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449 | bExecuting = false; |
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450 | } |
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451 | else |
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452 | { |
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453 | COUT(1) << "An error occurred while writing the backtrace" << std::endl; |
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454 | } |
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455 | |
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456 | if (SignalHandler::getInstance().prevExceptionFilter_) |
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457 | return SignalHandler::getInstance().prevExceptionFilter_(pExceptionInfo); |
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458 | else |
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459 | return EXCEPTION_CONTINUE_SEARCH; |
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460 | } |
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461 | |
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462 | /// Returns the stack trace for either the current function, or, if @a pExceptionInfo is not NULL, for the given exception context. |
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463 | /* static */ std::string SignalHandler::getStackTrace(PEXCEPTION_POINTERS pExceptionInfo) |
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464 | { |
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465 | // Initialise the symbol table to get function names: |
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466 | SymSetOptions |
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467 | ( |
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468 | SYMOPT_DEFERRED_LOADS |
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469 | #ifndef ORXONOX_COMPILER_GCC |
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470 | | SYMOPT_UNDNAME |
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471 | #endif |
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472 | ); |
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473 | SymInitialize(GetCurrentProcess(), 0, true); |
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474 | |
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475 | // Store the current stack frame here: |
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476 | STACKFRAME64 frame; |
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477 | memset(&frame, 0, sizeof(STACKFRAME64)); |
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478 | |
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479 | // Get processor information for the current thread: |
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480 | CONTEXT context; |
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481 | memset(&context, 0, sizeof(CONTEXT)); |
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482 | |
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483 | if (pExceptionInfo) |
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484 | { |
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485 | // get the context of the exception |
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486 | context = *pExceptionInfo->ContextRecord; |
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487 | } |
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488 | else |
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489 | { |
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490 | context.ContextFlags = CONTEXT_FULL; |
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491 | |
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492 | // Load the RTLCapture context function: |
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493 | HMODULE kernel32 = LoadLibrary("Kernel32.dll"); |
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494 | typedef void (*RtlCaptureContextFunc) (CONTEXT* ContextRecord); |
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495 | RtlCaptureContextFunc rtlCaptureContext = (RtlCaptureContextFunc) GetProcAddress(kernel32, "RtlCaptureContext"); |
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496 | |
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497 | // Capture the thread context |
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498 | rtlCaptureContext(&context); |
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499 | } |
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500 | |
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501 | DWORD type; |
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502 | |
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503 | // set the flags and initialize the stackframe struct |
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504 | #ifdef _M_IX86 |
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505 | type = IMAGE_FILE_MACHINE_I386; |
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506 | |
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507 | frame.AddrPC.Offset = context.Eip; // program counter |
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508 | frame.AddrFrame.Offset = context.Ebp; // frame pointer (for function arguments) |
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509 | frame.AddrStack.Offset = context.Esp; // stack pointer |
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510 | #elif _M_X64 |
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511 | type = IMAGE_FILE_MACHINE_AMD64; |
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512 | |
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513 | frame.AddrPC.Offset = context.Rip; // program counter |
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514 | frame.AddrFrame.Offset = context.Rbp; // (or Rdi) // frame pointer (for function arguments) |
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515 | frame.AddrStack.Offset = context.Rsp; // stack pointer |
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516 | #elif _M_IA64 |
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517 | type = IMAGE_FILE_MACHINE_IA64; |
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518 | |
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519 | frame.AddrPC.Offset = context.StIIP; // program counter |
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520 | frame.AddrFrame.Offset = context.RsBSP; // frame pointer (for function arguments) // <-- unneeded on Intel IPF, may be removed |
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521 | frame.AddrStack.Offset = context.IntSp; // stack pointer |
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522 | frame.AddrBStore.Offset = context.RsBSP; // backing store |
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523 | frame.AddrBStore.Mode = AddrModeFlat; |
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524 | #else |
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525 | return ""; |
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526 | #endif |
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527 | |
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528 | frame.AddrPC.Mode = AddrModeFlat; |
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529 | frame.AddrFrame.Mode = AddrModeFlat; |
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530 | frame.AddrStack.Mode = AddrModeFlat; |
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531 | |
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532 | std::string output; |
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533 | |
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534 | // Keep getting stack frames from windows till there are no more left: |
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535 | for (int i = 0; |
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536 | StackWalk64 |
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537 | ( |
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538 | type , // MachineType |
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539 | GetCurrentProcess() , // Process to get stack trace for |
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540 | GetCurrentThread() , // Thread to get stack trace for |
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541 | &frame , // Where to store next stack frame |
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542 | &context , // Pointer to processor context record |
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543 | 0 , // Routine to read process memory: use the default ReadProcessMemory |
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544 | &SymFunctionTableAccess64 , // Routine to access the modules symbol table |
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545 | &SymGetModuleBase64 , // Routine to access the modules base address |
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546 | 0 // Something to do with 16-bit code. Not needed. |
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547 | ); |
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548 | ++i |
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549 | ) |
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550 | { |
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551 | //------------------------------------------------------------------ |
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552 | // Declare an image help symbol structure to hold symbol info and |
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553 | // name up to 256 chars This struct is of variable lenght though so |
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554 | // it must be declared as a raw byte buffer. |
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555 | //------------------------------------------------------------------ |
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556 | static char symbolBuffer[sizeof(SYMBOL_INFO) + 255]; |
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557 | memset(symbolBuffer, 0, sizeof(symbolBuffer)); |
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558 | |
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559 | // Cast it to a symbol struct: |
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560 | SYMBOL_INFO* symbol = (SYMBOL_INFO*)symbolBuffer; |
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561 | |
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562 | // Need to set two fields of this symbol before obtaining name info: |
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563 | symbol->SizeOfStruct = sizeof(SYMBOL_INFO); |
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564 | symbol->MaxNameLen = 255; |
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565 | |
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566 | // The displacement from the beginning of the symbol is stored here: pretty useless |
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567 | long long unsigned int displacement = 0; |
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568 | |
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569 | if (i < 10) |
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570 | output += " "; |
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571 | output += multi_cast<std::string>(i) + ": "; |
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572 | |
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573 | // Print the function's address: |
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574 | output += SignalHandler::pointerToString(frame.AddrPC.Offset); |
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575 | |
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576 | // Get the symbol information from the address of the instruction pointer register: |
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577 | bool bCorrected = false; |
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578 | BOOL result = SymFromAddr |
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579 | ( |
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580 | GetCurrentProcess() , // Process to get symbol information for |
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581 | frame.AddrPC.Offset , // Address to get symbol for: instruction pointer register |
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582 | &displacement , // Displacement from the beginning of the symbol |
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583 | symbol // Where to save the symbol |
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584 | ); |
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585 | |
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586 | // If the symbol was found, but the displacement is 0, we likely got the wrong symbol - decrease the program counter and try again |
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587 | if (result && displacement == 0) |
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588 | { |
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589 | bCorrected = true; |
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590 | result = SymFromAddr |
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591 | ( |
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592 | GetCurrentProcess() , |
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593 | frame.AddrPC.Offset - 1 , |
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594 | &displacement , |
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595 | symbol |
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596 | ); |
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597 | } |
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598 | |
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599 | // Display the function name + offset |
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600 | if (result) |
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601 | { |
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602 | // Add the name of the function to the function list: |
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603 | output += " "; |
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604 | |
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605 | #ifdef ORXONOX_COMPILER_GCC |
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606 | int status; |
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607 | char* demangled = __cxxabiv1::__cxa_demangle(symbol->Name, NULL, NULL, &status); |
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608 | if (demangled) |
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609 | { |
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610 | output += demangled; |
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611 | free(demangled); |
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612 | } |
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613 | else |
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614 | #endif |
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615 | { |
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616 | output += symbol->Name; |
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617 | } |
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618 | |
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619 | output += " +" + SignalHandler::pointerToString(displacement, false); |
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620 | if (bCorrected) |
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621 | output += " (?)"; |
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622 | } |
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623 | |
---|
624 | output += "\n"; |
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625 | |
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626 | // Get the file name and line number |
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627 | IMAGEHLP_LINE64 line; |
---|
628 | memset(&line, 0, sizeof(IMAGEHLP_LINE64)); |
---|
629 | line.SizeOfStruct = sizeof(IMAGEHLP_LINE64); |
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630 | |
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631 | DWORD displacement2 = 0; |
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632 | |
---|
633 | if |
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634 | ( |
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635 | SymGetLineFromAddr64 |
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636 | ( |
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637 | GetCurrentProcess(), |
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638 | frame.AddrPC.Offset - bCorrected ? 1 : 0, |
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639 | &displacement2, |
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640 | &line |
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641 | ) |
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642 | ) |
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643 | { |
---|
644 | output += " "; |
---|
645 | output += line.FileName; |
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646 | output += ":"; |
---|
647 | output += multi_cast<std::string>(line.LineNumber); |
---|
648 | output += "\n"; |
---|
649 | } |
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650 | } |
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651 | |
---|
652 | // Cleanup the symbol table: |
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653 | SymCleanup(GetCurrentProcess()); |
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654 | |
---|
655 | return output; |
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656 | } |
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657 | |
---|
658 | /// Returns a description of the given exception. |
---|
659 | // Based on code from Dr. Mingw by José Fonseca |
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660 | /* static */ std::string SignalHandler::getExceptionType(PEXCEPTION_POINTERS pExceptionInfo) |
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661 | { |
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662 | PEXCEPTION_RECORD pExceptionRecord = pExceptionInfo->ExceptionRecord; |
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663 | TCHAR szModule[MAX_PATH]; |
---|
664 | HMODULE hModule; |
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665 | |
---|
666 | std::string output = (GetModuleFileName(NULL, szModule, MAX_PATH) ? SignalHandler::getModuleName(szModule) : "Application"); |
---|
667 | output += " caused "; |
---|
668 | |
---|
669 | switch(pExceptionRecord->ExceptionCode) |
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670 | { |
---|
671 | case EXCEPTION_ACCESS_VIOLATION: output += "an Access Violation"; break; |
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672 | case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: output += "an Array Bound Exceeded"; break; |
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673 | case EXCEPTION_BREAKPOINT: output += "a Breakpoint"; break; |
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674 | case EXCEPTION_DATATYPE_MISALIGNMENT: output += "a Datatype Misalignment"; break; |
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675 | case EXCEPTION_FLT_DENORMAL_OPERAND: output += "a Float Denormal Operand"; break; |
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676 | case EXCEPTION_FLT_DIVIDE_BY_ZERO: output += "a Float Divide By Zero"; break; |
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677 | case EXCEPTION_FLT_INEXACT_RESULT: output += "a Float Inexact Result"; break; |
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678 | case EXCEPTION_FLT_INVALID_OPERATION: output += "a Float Invalid Operation"; break; |
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679 | case EXCEPTION_FLT_OVERFLOW: output += "a Float Overflow"; break; |
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680 | case EXCEPTION_FLT_STACK_CHECK: output += "a Float Stack Check"; break; |
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681 | case EXCEPTION_FLT_UNDERFLOW: output += "a Float Underflow"; break; |
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682 | case EXCEPTION_GUARD_PAGE: output += "a Guard Page"; break; |
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683 | case EXCEPTION_ILLEGAL_INSTRUCTION: output += "an Illegal Instruction"; break; |
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684 | case EXCEPTION_IN_PAGE_ERROR: output += "an In Page Error"; break; |
---|
685 | case EXCEPTION_INT_DIVIDE_BY_ZERO: output += "an Integer Divide By Zero"; break; |
---|
686 | case EXCEPTION_INT_OVERFLOW: output += "an Integer Overflow"; break; |
---|
687 | case EXCEPTION_INVALID_DISPOSITION: output += "an Invalid Disposition"; break; |
---|
688 | case EXCEPTION_INVALID_HANDLE: output += "an Invalid Handle"; break; |
---|
689 | case EXCEPTION_NONCONTINUABLE_EXCEPTION: output += "a Noncontinuable Exception"; break; |
---|
690 | case EXCEPTION_PRIV_INSTRUCTION: output += "a Privileged Instruction"; break; |
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691 | case EXCEPTION_SINGLE_STEP: output += "a Single Step"; break; |
---|
692 | case EXCEPTION_STACK_OVERFLOW: output += "a Stack Overflow"; break; |
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693 | case DBG_CONTROL_C: output += "a Control+C"; break; |
---|
694 | case DBG_CONTROL_BREAK: output += "a Control+Break"; break; |
---|
695 | case DBG_TERMINATE_THREAD: output += "a Terminate Thread"; break; |
---|
696 | case DBG_TERMINATE_PROCESS: output += "a Terminate Process"; break; |
---|
697 | case RPC_S_UNKNOWN_IF: output += "an Unknown Interface"; break; |
---|
698 | case RPC_S_SERVER_UNAVAILABLE: output += "a Server Unavailable"; break; |
---|
699 | default: output += "an Unknown Exception (" + SignalHandler::pointerToString(pExceptionRecord->ExceptionCode) + ")"; break; |
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700 | } |
---|
701 | |
---|
702 | // Now print information about where the fault occured |
---|
703 | output += " at location " + SignalHandler::pointerToString(pExceptionRecord->ExceptionAddress); |
---|
704 | if ((hModule = (HMODULE) SignalHandler::getModuleBase((DWORD) pExceptionRecord->ExceptionAddress)) && GetModuleFileName(hModule, szModule, MAX_PATH)) |
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705 | { |
---|
706 | output += " in module "; |
---|
707 | output += SignalHandler::getModuleName(szModule); |
---|
708 | } |
---|
709 | |
---|
710 | // If the exception was an access violation, print out some additional information, to the error log and the debugger. |
---|
711 | if(pExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && pExceptionRecord->NumberParameters >= 2) |
---|
712 | { |
---|
713 | output += " "; |
---|
714 | output += pExceptionRecord->ExceptionInformation[0] ? "writing to" : "reading from"; |
---|
715 | output += " location "; |
---|
716 | output += SignalHandler::pointerToString(pExceptionRecord->ExceptionInformation[1]); |
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717 | } |
---|
718 | |
---|
719 | return output; |
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720 | } |
---|
721 | |
---|
722 | /// Strips the directories from the path to the module and returns the module's name only. |
---|
723 | /* static */ std::string SignalHandler::getModuleName(const std::string& path) |
---|
724 | { |
---|
725 | return path.substr(path.find_last_of('\\') + 1); |
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726 | } |
---|
727 | |
---|
728 | /// Retrieves the base address of the module that contains the specified address. |
---|
729 | // Code from Dr. Mingw by José Fonseca |
---|
730 | /* static */ DWORD SignalHandler::getModuleBase(DWORD dwAddress) |
---|
731 | { |
---|
732 | MEMORY_BASIC_INFORMATION Buffer; |
---|
733 | |
---|
734 | return VirtualQuery((LPCVOID) dwAddress, &Buffer, sizeof(Buffer)) ? (DWORD) Buffer.AllocationBase : 0; |
---|
735 | } |
---|
736 | |
---|
737 | /// Converts a value to string, formatted as pointer. |
---|
738 | template <typename T> |
---|
739 | /* static */ std::string SignalHandler::pointerToString(T pointer, bool bFillZeros) |
---|
740 | { |
---|
741 | std::ostringstream oss; |
---|
742 | |
---|
743 | if (bFillZeros) |
---|
744 | oss << std::setw(8) << std::setfill('0'); |
---|
745 | |
---|
746 | oss << std::hex << pointer; |
---|
747 | |
---|
748 | return std::string("0x") + oss.str(); |
---|
749 | } |
---|
750 | |
---|
751 | /// Converts a pointer to string. |
---|
752 | template <typename T> |
---|
753 | /* static */ std::string SignalHandler::pointerToString(T* pointer) |
---|
754 | { |
---|
755 | std::ostringstream oss; |
---|
756 | |
---|
757 | oss << pointer; |
---|
758 | |
---|
759 | return oss.str(); |
---|
760 | } |
---|
761 | } |
---|
762 | |
---|
763 | #endif |
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