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annotate druntime/src/compiler/ldc/memory.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 * 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 version = GC_Use_Dynamic_Ranges;
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29
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30 // does Posix suffice?
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31 version(Posix)
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32 {
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33 version = GC_Use_Data_Proc_Maps;
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34 }
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35
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36 version(GC_Use_Data_Proc_Maps)
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37 {
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38 version(Posix) {} else {
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39 static assert(false, "Proc Maps only supported on Posix systems");
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40 }
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41
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42 version( D_Version2 )
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43 {
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44 private import stdc.posix.unistd;
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45 private import stdc.posix.fcntl;
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46 private import stdc.string;
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47 }
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48 else
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49 {
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50 private import tango.stdc.posix.unistd;
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51 private import tango.stdc.posix.fcntl;
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52 private import tango.stdc.string;
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53 }
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54
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55 version = GC_Use_Dynamic_Ranges;
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56 }
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57
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58 private
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59 {
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60 version( linux )
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61 {
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62 //version = SimpleLibcStackEnd;
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63
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64 version( SimpleLibcStackEnd )
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65 {
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66 extern (C) extern void* __libc_stack_end;
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67 }
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68 else
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69 {
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70 version( D_Version2 )
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71 import stdc.posix.dlfcn;
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72 else
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73 import tango.stdc.posix.dlfcn;
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74 }
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75 }
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76 version(LDC)
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77 {
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78 pragma(intrinsic, "llvm.frameaddress")
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79 {
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80 void* llvm_frameaddress(uint level=0);
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81 }
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82 }
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83 }
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84
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85
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86 /**
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87 *
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88 */
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89 extern (C) void* rt_stackBottom()
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90 {
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91 version( Win32 )
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92 {
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93 void* bottom;
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94 asm
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95 {
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96 mov EAX, FS:4;
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97 mov bottom, EAX;
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98 }
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99 return bottom;
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100 }
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101 else version( linux )
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102 {
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103 version( SimpleLibcStackEnd )
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104 {
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105 return __libc_stack_end;
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106 }
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107 else
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108 {
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109 // See discussion: http://autopackage.org/forums/viewtopic.php?t=22
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110 static void** libc_stack_end;
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111
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112 if( libc_stack_end == libc_stack_end.init )
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113 {
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114 void* handle = dlopen( null, RTLD_NOW );
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115 libc_stack_end = cast(void**) dlsym( handle, "__libc_stack_end" );
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116 dlclose( handle );
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117 }
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118 return *libc_stack_end;
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119 }
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120 }
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121 else version( darwin )
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122 {
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123 // darwin has a fixed stack bottom
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124 return cast(void*) 0xc0000000;
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125 }
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126 else
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
127 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
128 static assert( false, "Operating system not supported." );
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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129 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
130 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
131
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
132
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
133 /**
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
134 *
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
135 */
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
136 extern (C) void* rt_stackTop()
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
137 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
138 version(LDC)
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
139 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
140 return llvm_frameaddress();
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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141 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
142 else version( D_InlineAsm_X86 )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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143 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
144 asm
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
145 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
146 naked;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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147 mov EAX, ESP;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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148 ret;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
149 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
150 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
151 else
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
152 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
153 static assert( false, "Architecture not supported." );
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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154 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
155 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
156
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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157
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
158 private
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
159 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
160 version( Win32 )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
161 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
162 extern (C)
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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163 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
164 extern int _data_start__;
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parents:
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165 extern int _bss_end__;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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166
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
167 alias _data_start__ Data_Start;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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168 alias _bss_end__ Data_End;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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169 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
170 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
171 else version( linux )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
172 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
173 extern (C)
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
174 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
175 extern int _data;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
176 extern int __data_start;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
177 extern int _end;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
178 extern int _data_start__;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
179 extern int _data_end__;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
180 extern int _bss_start__;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
181 extern int _bss_end__;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
182 extern int __fini_array_end;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
183 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
184
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
185 alias __data_start Data_Start;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
186 alias _end Data_End;
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
187 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
188
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
189 version( GC_Use_Dynamic_Ranges )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
190 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
191 version( D_Version2 )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
192 private import stdc.stdlib;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
193 else
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
194 private import tango.stdc.stdlib;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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parents:
diff changeset
195
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
196 struct DataSeg
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
197 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
198 void* beg;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
199 void* end;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
200 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
201
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
202 DataSeg* allSegs = null;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
203 size_t numSegs = 0;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
204
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
205 extern (C) void _d_gc_add_range( void* beg, void* end )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
206 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
207 void* ptr = realloc( allSegs, (numSegs + 1) * DataSeg.sizeof );
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
208
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
209 if( ptr ) // if realloc fails, we have problems
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
210 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
211 allSegs = cast(DataSeg*) ptr;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
212 allSegs[numSegs].beg = beg;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
213 allSegs[numSegs].end = end;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
214 numSegs++;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
215 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
216 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
217
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
218 extern (C) void _d_gc_remove_range( void* beg )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
219 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
220 for( size_t pos = 0; pos < numSegs; ++pos )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
221 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
222 if( beg == allSegs[pos].beg )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
223 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
224 while( ++pos < numSegs )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
225 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
226 allSegs[pos-1] = allSegs[pos];
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
227 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
228 numSegs--;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
229 return;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
230 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
231 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
232 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
233 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
234
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
235 alias void delegate( void*, void* ) scanFn;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
236
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
237 void* dataStart, dataEnd;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
238 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
239
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
240
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
241 /**
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
242 *
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
243 */
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
244 extern (C) void rt_scanStaticData( scanFn scan )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
245 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
246 scan( dataStart, dataEnd );
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
247
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
248 version( GC_Use_Dynamic_Ranges )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
249 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
250 for( size_t pos = 0; pos < numSegs; ++pos )
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
251 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
252 scan( allSegs[pos].beg, allSegs[pos].end );
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
253 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
254 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
255 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
256
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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257 void initStaticDataPtrs()
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258 {
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259 version( D_Version2 )
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260 enum { int S = (void*).sizeof }
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261 else
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262 const int S = (void*).sizeof;
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263
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264 // Can't assume the input addresses are word-aligned
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265 static void* adjust_up( void* p )
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266 {
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267 return p + ((S - (cast(size_t)p & (S-1))) & (S-1)); // cast ok even if 64-bit
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268 }
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269
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270 static void * adjust_down( void* p )
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271 {
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272 return p - (cast(size_t) p & (S-1));
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273 }
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274
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275 version( Win32 )
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276 {
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277 dataStart = adjust_up( &Data_Start );
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278 dataEnd = adjust_down( &Data_End );
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279 }
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280 else version( GC_Use_Data_Proc_Maps )
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281 {
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282 // TODO: Exclude zero-mapped regions
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283
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284 int fd = open("/proc/self/maps", O_RDONLY);
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285 int count; // %% need to configure ret for read..
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286 char buf[2024];
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287 char* p;
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288 char* e;
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289 char* s;
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290 void* start;
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291 void* end;
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292
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293 p = buf.ptr;
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294 if (fd != -1)
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295 {
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296 while ( (count = read(fd, p, buf.sizeof - (p - buf.ptr))) > 0 )
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297 {
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298 e = p + count;
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299 p = buf.ptr;
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300 while (true)
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301 {
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302 s = p;
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diff changeset
303 while (p < e && *p != '\n')
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304 p++;
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305 if (p < e)
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306 {
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307 // parse the entry in [s, p)
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308 static if( S == 4 )
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309 {
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310 enum Ofs
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311 {
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312 Write_Prot = 19,
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313 Start_Addr = 0,
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314 End_Addr = 9,
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315 Addr_Len = 8,
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316 }
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317 }
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diff changeset
318 else static if( S == 8 )
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diff changeset
319 {
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diff changeset
320 enum Ofs
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diff changeset
321 {
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diff changeset
322 Write_Prot = 35,
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diff changeset
323 Start_Addr = 0,
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diff changeset
324 End_Addr = 9,
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diff changeset
325 Addr_Len = 17,
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diff changeset
326 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
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diff changeset
327 }
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parents:
diff changeset
328 else
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
329 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
330 static assert( false );
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diff changeset
331 }
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parents:
diff changeset
332
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
333 // %% this is wrong for 64-bit:
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diff changeset
334 // uint strtoul(char *,char **,int);
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diff changeset
335
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parents:
diff changeset
336 if( s[Ofs.Write_Prot] == 'w' )
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parents:
diff changeset
337 {
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diff changeset
338 s[Ofs.Start_Addr + Ofs.Addr_Len] = '\0';
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diff changeset
339 s[Ofs.End_Addr + Ofs.Addr_Len] = '\0';
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parents:
diff changeset
340 start = cast(void*) strtoul(s + Ofs.Start_Addr, null, 16);
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parents:
diff changeset
341 end = cast(void*) strtoul(s + Ofs.End_Addr, null, 16);
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parents:
diff changeset
342
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parents:
diff changeset
343 // 1. Exclude anything overlapping [dataStart, dataEnd)
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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diff changeset
344 // 2. Exclude stack
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parents:
diff changeset
345 if ( ( !dataEnd ||
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diff changeset
346 !( dataStart >= start && dataEnd <= end ) ) &&
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diff changeset
347 !( &buf[0] >= start && &buf[0] < end ) )
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parents:
diff changeset
348 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
349 // we already have static data from this region. anything else
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parents:
diff changeset
350 // is heap (%% check)
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parents:
diff changeset
351 debug (ProcMaps) printf("Adding map range %p 0%p\n", start, end);
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parents:
diff changeset
352 _d_gc_add_range(start, end);
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parents:
diff changeset
353 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
354 }
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
355 p++;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
356 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
357 else
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
358 {
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
359 count = p - s;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
360 memmove(buf.ptr, s, count);
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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parents:
diff changeset
361 p = buf.ptr + count;
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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parents:
diff changeset
362 break;
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parents:
diff changeset
363 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
364 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
365 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
366 close(fd);
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Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
367 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
368 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
369 else version(linux)
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
370 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
371 dataStart = adjust_up( &Data_Start );
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
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parents:
diff changeset
372 dataEnd = adjust_down( &Data_End );
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parents:
diff changeset
373 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
374 else
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
375 {
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
376 static assert( false, "Operating system not supported." );
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parents:
diff changeset
377 }
d3eb054172f9 Added copy of druntime from DMD 2.020 modified for LDC.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff changeset
378 }