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annotate druntime/src/compiler/ldc/dmain2.d @ 759:d3eb054172f9

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Added copy of druntime from DMD 2.020 modified for LDC.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Tue, 11 Nov 2008 01:52:37 +0100
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759
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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1 /*
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2 * Placed into the Public Domain.
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3 * written by Walter Bright
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4 * www.digitalmars.com
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5 */
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6
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7 /*
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8 * Modified by Sean Kelly <sean@f4.ca> for use with Tango.
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9 */
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10
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11 private
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12 {
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13 import util.console;
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14
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15 version( D_Version2)
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16 {
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17 import stdc.stddef;
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18 import stdc.stdlib;
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19 import stdc.string;
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20 }
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21 else
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22 {
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23 import tango.stdc.stddef;
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24 import tango.stdc.stdlib;
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25 import tango.stdc.string;
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26 }
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27 import memory;
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28 }
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29
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30 version( Win32 )
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31 {
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32 extern (Windows) void* LocalFree(void*);
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33 extern (Windows) wchar_t* GetCommandLineW();
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34 extern (Windows) wchar_t** CommandLineToArgvW(wchar_t*, int*);
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35 extern (Windows) export int WideCharToMultiByte(uint, uint, wchar_t*, int, char*, int, char*, int);
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36 //pragma(lib, "shell32.lib"); // needed for CommandLineToArgvW
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37 //pragma(lib, "tango-win32-dmd.lib"); // links Tango's Win32 library to reduce EXE size
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38 }
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39
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40 extern (C) void _STI_monitor_staticctor();
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41 extern (C) void _STD_monitor_staticdtor();
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42 extern (C) void _STI_critical_init();
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43 extern (C) void _STD_critical_term();
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44 extern (C) void gc_init();
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45 extern (C) void gc_term();
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46 extern (C) void _moduleCtor();
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47 extern (C) void _moduleDtor();
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48 extern (C) void thread_joinAll();
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49
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50 //debug=PRINTF;
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51 debug(PRINTF) extern (C) int printf(char*, ...);
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52
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53 /***********************************
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54 * These functions must be defined for any D program linked
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55 * against this library.
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56 */
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57 extern (C) void onAssertError( char[] file, size_t line );
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58 extern (C) void onAssertErrorMsg( char[] file, size_t line, char[] msg );
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59 extern (C) void onArrayBoundsError( char[] file, size_t line );
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60 extern (C) void onSwitchError( char[] file, size_t line );
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61 extern (C) bool runModuleUnitTests();
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62
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63 // this function is called from the utf module
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64 //extern (C) void onUnicodeError( char[] msg, size_t idx );
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65
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66 /***********************************
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67 * These are internal callbacks for various language errors.
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68 */
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69 extern (C) void _d_assert( char[] file, uint line )
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70 {
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71 onAssertError( file, line );
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72 }
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73
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74 extern (C) void _d_assert_msg( char[] msg, char[] file, uint line )
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75 {
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76 onAssertErrorMsg( file, line, msg );
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77 }
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78
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79 extern (C) void _d_array_bounds( char[] file, uint line )
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80 {
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81 onArrayBoundsError( file, line );
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82 }
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83
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84 extern (C) void _d_switch_error( char[] file, uint line )
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85 {
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86 onSwitchError( file, line );
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87 }
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88
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89 bool _d_isHalting = false;
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90
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91 extern (C) bool rt_isHalting()
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92 {
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93 return _d_isHalting;
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94 }
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95
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96 extern (C) bool rt_trapExceptions = true;
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97
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98 void _d_criticalInit()
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99 {
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100 _STI_monitor_staticctor();
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101 _STI_critical_init();
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102 initStaticDataPtrs();
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103 }
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104
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105 alias void delegate( Throwable ) ExceptionHandler;
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106
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107 // this is here so users can manually initialize the runtime
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108 // for example, when there is no main function etc.
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109 extern (C) bool rt_init( ExceptionHandler dg = null )
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110 {
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111 _d_criticalInit();
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112
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113 try
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114 {
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115 gc_init();
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116 _moduleCtor();
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117 return true;
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118 }
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119 catch( Throwable e )
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120 {
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121 if( dg )
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122 dg( e );
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123 }
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124 catch
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125 {
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126
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127 }
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128 _d_criticalTerm();
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129 return false;
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130 }
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131
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132 void _d_criticalTerm()
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133 {
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134 _STD_critical_term();
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135 _STD_monitor_staticdtor();
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136 }
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137
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138 // this is here so users can manually terminate the runtime
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139 // for example, when there is no main function etc.
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140 extern (C) bool rt_term( ExceptionHandler dg = null )
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141 {
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142 try
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143 {
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144 thread_joinAll();
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145 _d_isHalting = true;
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146 _moduleDtor();
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147 gc_term();
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148 return true;
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149 }
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150 catch( Throwable e )
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151 {
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152 if( dg )
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153 dg( e );
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154 }
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155 catch
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156 {
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157
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158 }
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159 finally
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160 {
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161 _d_criticalTerm();
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162 }
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163 return false;
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164 }
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165
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166 /***********************************
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167 * The D main() function supplied by the user's program
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168 */
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169 int main(char[][] args);
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170
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171 /***********************************
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172 * Substitutes for the C main() function.
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173 * It's purpose is to wrap the call to the D main()
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174 * function and catch any unhandled exceptions.
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175 */
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176
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177 extern (C) int main(int argc, char **argv, char** env)
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178 {
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179 char[][] args;
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180 int result;
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181
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182 debug(PRINTF) printf("main ctors\n");
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183 _STI_monitor_staticctor();
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184 _STI_critical_init();
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185 initStaticDataPtrs();
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186
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187 debug(PRINTF) printf("main args\n");
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188 // GDC seems to get by without this Windows special case...
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189 version (Win32)
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190 {
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191 wchar_t* wcbuf = GetCommandLineW();
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192 size_t wclen = wcslen(wcbuf);
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193 int wargc = 0;
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194 wchar_t** wargs = CommandLineToArgvW(wcbuf, &wargc);
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195 assert(wargc == argc);
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196
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197 char* cargp = null;
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198 size_t cargl = WideCharToMultiByte(65001, 0, wcbuf, wclen, null, 0, null, 0);
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199
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200 cargp = cast(char*) alloca(cargl);
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201 args = ((cast(char[]*) alloca(wargc * (char[]).sizeof)))[0 .. wargc];
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202
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diff changeset
203 for (size_t i = 0, p = 0; i < wargc; i++)
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204 {
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diff changeset
205 int wlen = wcslen( wargs[i] );
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diff changeset
206 int clen = WideCharToMultiByte(65001, 0, &wargs[i][0], wlen, null, 0, null, 0);
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207 args[i] = cargp[p .. p+clen];
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208 p += clen; assert(p <= cargl);
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209 WideCharToMultiByte(65001, 0, &wargs[i][0], wlen, &args[i][0], clen, null, 0);
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210 }
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diff changeset
211 LocalFree(wargs);
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diff changeset
212 wargs = null;
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diff changeset
213 wargc = 0;
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214 }
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diff changeset
215 else
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diff changeset
216 {
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diff changeset
217 char[]* am = cast(char[]*) malloc(argc * (char[]).sizeof);
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diff changeset
218 scope(exit) free(am);
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219
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diff changeset
220 for (size_t i = 0; i < argc; i++)
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diff changeset
221 {
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parents:
diff changeset
222 auto len = strlen(argv[i]);
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diff changeset
223 am[i] = argv[i][0 .. len];
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diff changeset
224 }
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parents:
diff changeset
225 args = am[0 .. argc];
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diff changeset
226 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
227
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diff changeset
228 debug(PRINTF) printf("main trap exceptions\n");
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diff changeset
229 bool trapExceptions = rt_trapExceptions;
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diff changeset
230
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diff changeset
231 void tryExec(void delegate() dg)
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diff changeset
232 {
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diff changeset
233 debug(PRINTF) printf("main try exec\n");
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diff changeset
234 if (trapExceptions)
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diff changeset
235 {
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parents:
diff changeset
236 try
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
237 {
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parents:
diff changeset
238 dg();
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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diff changeset
239 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
240 catch (Throwable e)
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
241 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
242 while (e)
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
243 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
244 if (e.file)
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diff changeset
245 {
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parents:
diff changeset
246 // fprintf(stderr, "%.*s(%u): %.*s\n", e.file, e.line, e.msg);
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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parents:
diff changeset
247 console (e.classinfo.name)("@")(e.file)("(")(e.line)("): ")(e.toString)("\n");
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diff changeset
248 }
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parents:
diff changeset
249 else
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
250 {
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251 // fprintf(stderr, "%.*s\n", e.toString());
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252 console (e.classinfo.name)(": ")(e.toString)("\n");
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253 }
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254 if (e.info)
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255 {
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256 console ("----------------\n");
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257 foreach (t; e.info)
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258 console (t)("\n");
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259 }
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260 if (e.next)
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261 console ("\n");
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262 e = e.next;
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263 }
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264 result = EXIT_FAILURE;
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265 }
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266 catch (Object o)
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267 {
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268 // fprintf(stderr, "%.*s\n", o.toString());
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269 console (o.toString)("\n");
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270 result = EXIT_FAILURE;
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271 }
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272 }
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273 else
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274 {
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275 dg();
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276 }
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277 }
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278
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279 // NOTE: The lifetime of a process is much like the lifetime of an object:
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280 // it is initialized, then used, then destroyed. If initialization
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281 // fails, the successive two steps are never reached. However, if
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282 // initialization succeeds, then cleanup will occur even if the use
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283 // step fails in some way. Here, the use phase consists of running
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284 // the user's main function. If main terminates with an exception,
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285 // the exception is handled and then cleanup begins. An exception
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286 // thrown during cleanup, however, will abort the cleanup process.
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287
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288 void runMain()
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289 {
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290 debug(PRINTF) printf("main runMain\n");
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291 result = main(args);
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292 }
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293
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294 void runAll()
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295 {
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296 debug(PRINTF) printf("main runAll\n");
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297 gc_init();
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298 _moduleCtor();
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299 if (runModuleUnitTests())
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300 tryExec(&runMain);
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301 thread_joinAll();
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302 _d_isHalting = true;
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303 _moduleDtor();
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304 gc_term();
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305 }
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306
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307 tryExec(&runAll);
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308
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309 debug(PRINTF) printf("main dtor\n");
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310 _STD_critical_term();
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311 _STD_monitor_staticdtor();
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312
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313 return result;
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314 }