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annotate runtime/internal/memory.d @ 443:44f08170f4ef

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Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn. Reworked the LLVMDC specific pragmas.
author Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
date Fri, 01 Aug 2008 00:32:06 +0200
parents
children 02fb65cddc3e
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443
44f08170f4ef Removed tango from the repository and instead added a runtime dir with the files needed to patch and build tango from svn.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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1 /**
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2 * This module exposes functionality for inspecting and manipulating memory.
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3 *
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4 * Copyright: Copyright (C) 2005-2006 Digital Mars, www.digitalmars.com.
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5 * All rights reserved.
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6 * License:
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7 * This software is provided 'as-is', without any express or implied
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8 * warranty. In no event will the authors be held liable for any damages
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9 * arising from the use of this software.
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10 *
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11 * Permission is granted to anyone to use this software for any purpose,
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12 * including commercial applications, and to alter it and redistribute it
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13 * freely, in both source and binary form, subject to the following
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14 * restrictions:
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15 *
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16 * o The origin of this software must not be misrepresented; you must not
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17 * claim that you wrote the original software. If you use this software
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18 * in a product, an acknowledgment in the product documentation would be
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19 * appreciated but is not required.
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20 * o Altered source versions must be plainly marked as such, and must not
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21 * be misrepresented as being the original software.
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22 * o This notice may not be removed or altered from any source
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23 * distribution.
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24 * Authors: Walter Bright, Sean Kelly
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25 */
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26 module memory;
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27
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28
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29 private
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30 {
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31 version( linux )
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32 {
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33 //version = SimpleLibcStackEnd;
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34
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35 version( SimpleLibcStackEnd )
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36 {
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37 extern (C) extern void* __libc_stack_end;
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38 }
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39 else
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40 {
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41 import tango.stdc.posix.dlfcn;
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42 }
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43 }
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44 version(LLVMDC)
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45 {
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46 pragma(intrinsic, "llvm.frameaddress")
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47 {
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48 void* llvm_frameaddress(uint level=0);
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49 }
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50 }
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51 }
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52
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53
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54 /**
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55 *
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56 */
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57 extern (C) void* rt_stackBottom()
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58 {
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59 version( Win32 )
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60 {
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61 asm
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62 {
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63 naked;
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64 mov EAX,FS:4;
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65 ret;
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66 }
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67 }
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68 else version( linux )
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69 {
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70 version( SimpleLibcStackEnd )
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71 {
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72 return __libc_stack_end;
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73 }
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74 else
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75 {
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76 // See discussion: http://autopackage.org/forums/viewtopic.php?t=22
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77 static void** libc_stack_end;
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78
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79 if( libc_stack_end == libc_stack_end.init )
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80 {
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81 void* handle = dlopen( null, RTLD_NOW );
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82 libc_stack_end = cast(void**) dlsym( handle, "__libc_stack_end" );
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83 dlclose( handle );
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84 }
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85 return *libc_stack_end;
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86 }
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87 }
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88 else
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89 {
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90 static assert( false, "Operating system not supported." );
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91 }
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92 }
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93
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94
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95 /**
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96 *
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97 */
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98 extern (C) void* rt_stackTop()
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99 {
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100 version(LLVMDC)
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101 {
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102 return llvm_frameaddress();
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103 }
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104 else version( D_InlineAsm_X86 )
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105 {
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106 asm
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107 {
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108 naked;
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109 mov EAX, ESP;
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110 ret;
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111 }
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112 }
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113 else
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114 {
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115 static assert( false, "Architecture not supported." );
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116 }
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117 }
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118
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119
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120 private
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121 {
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122 version( Win32 )
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123 {
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124 extern (C)
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125 {
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126 extern int _data_start__;
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127 extern int _bss_end__;
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128
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129 alias _data_start__ Data_Start;
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130 alias _bss_end__ Data_End;
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131 }
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132 }
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133 else version( linux )
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134 {
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135 extern (C)
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136 {
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137 extern int _data;
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138 extern int __data_start;
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139 extern int _end;
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140 extern int _data_start__;
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141 extern int _data_end__;
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142 extern int _bss_start__;
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143 extern int _bss_end__;
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144 extern int __fini_array_end;
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145 }
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146
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147 alias __data_start Data_Start;
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148 alias _end Data_End;
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149 }
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150
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151 alias void delegate( void*, void* ) scanFn;
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152 }
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153
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154
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155 /**
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156 *
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157 */
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158 extern (C) void rt_scanStaticData( scanFn scan )
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159 {
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160 version( Win32 )
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161 {
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162 scan( &Data_Start, &Data_End );
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163 }
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164 else version( linux )
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165 {
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166 //printf("scanning static data from %p to %p\n", &Data_Start, &Data_End);
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167 scan( &Data_Start, &Data_End );
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168 }
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169 else
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170 {
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171 static assert( false, "Operating system not supported." );
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172 }
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173 }