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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- G N A T . M E M O R Y _ D U M P --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 2003-2017, AdaCore --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 with System; use System;
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33 with System.Img_BIU; use System.Img_BIU;
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34 with System.Storage_Elements; use System.Storage_Elements;
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35
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36 with GNAT.IO; use GNAT.IO;
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37 with GNAT.Debug_Utilities; use GNAT.Debug_Utilities;
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38
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39 with Ada.Unchecked_Conversion;
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40
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41 package body GNAT.Memory_Dump is
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42
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43 ----------
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44 -- Dump --
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45 ----------
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46
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47 procedure Dump
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48 (Addr : Address;
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49 Count : Natural)
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50 is
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51 begin
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52 Dump (Addr, Count, Prefix => Absolute_Address);
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53 end Dump;
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54
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55 procedure Dump
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56 (Addr : Address;
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57 Count : Natural;
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58 Prefix : Prefix_Type)
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59 is
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60 Ctr : Natural := Count;
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61 -- Count of bytes left to output
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62
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63 Offset_Buf : String (1 .. Standard'Address_Size / 4 + 4);
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64 Offset_Last : Natural;
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65 -- Buffer for prefix in Offset mode
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66
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67 Adr : Address := Addr;
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68 -- Current address
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69
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70 N : Natural := 0;
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71 -- Number of bytes output on current line
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72
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73 C : Character;
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74 -- Character at current storage address
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75
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76 AIL : Natural;
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77 -- Number of chars in prefix (including colon and space)
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78
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79 Line_Len : Natural;
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80 -- Line length for entire line
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81
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82 Hex : constant array (0 .. 15) of Character := "0123456789ABCDEF";
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83
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84 type Char_Ptr is access all Character;
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85
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86 function To_Char_Ptr is new Ada.Unchecked_Conversion (Address, Char_Ptr);
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87
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88 begin
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89 case Prefix is
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90 when Absolute_Address =>
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91 AIL := Address_Image_Length - 4 + 2;
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92
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93 when Offset =>
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94 Offset_Last := Offset_Buf'First - 1;
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95 Set_Image_Based_Integer (Ctr, 16, 0, Offset_Buf, Offset_Last);
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96 AIL := Offset_Last - 4 + 2;
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97
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98 when None =>
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99 AIL := 0;
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100 end case;
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101
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102 Line_Len := AIL + 3 * 16 + 2 + 16;
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103
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104 declare
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105 Line_Buf : String (1 .. Line_Len);
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106
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107 begin
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108 while Ctr /= 0 loop
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109
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110 -- Start of line processing
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111
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112 if N = 0 then
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113 case Prefix is
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114 when Absolute_Address =>
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115 declare
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116 S : constant String := Image (Adr);
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117 begin
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118 Line_Buf (1 .. AIL) := S (4 .. S'Length - 1) & ": ";
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119 end;
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120
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121 when Offset =>
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122 declare
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123 Last : Natural := 0;
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124 Len : Natural;
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125
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126 begin
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127 Set_Image_Based_Integer
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128 (Count - Ctr, 16, 0, Offset_Buf, Last);
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129 Len := Last - 4;
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130
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131 Line_Buf (1 .. AIL - Len - 2) := (others => '0');
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132 Line_Buf (AIL - Len - 1 .. AIL - 2) :=
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133 Offset_Buf (4 .. Last - 1);
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134 Line_Buf (AIL - 1 .. AIL) := ": ";
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135 end;
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136
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137 when None =>
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138 null;
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139 end case;
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140
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141 Line_Buf (AIL + 1 .. Line_Buf'Last) := (others => ' ');
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142 Line_Buf (AIL + 3 * 16 + 1) := '"';
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143 end if;
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144
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145 -- Add one character to current line
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146
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147 C := To_Char_Ptr (Adr).all;
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148 Adr := Adr + 1;
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149 Ctr := Ctr - 1;
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150
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151 Line_Buf (AIL + 3 * N + 1) := Hex (Character'Pos (C) / 16);
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152 Line_Buf (AIL + 3 * N + 2) := Hex (Character'Pos (C) mod 16);
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153
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154 if C < ' ' or else C = Character'Val (16#7F#) then
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155 C := '?';
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156 end if;
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157
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158 Line_Buf (AIL + 3 * 16 + 2 + N) := C;
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159 N := N + 1;
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160
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161 -- End of line processing
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162
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163 if N = 16 then
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164 Line_Buf (Line_Buf'Last) := '"';
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165 GNAT.IO.Put_Line (Line_Buf);
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166 N := 0;
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167 end if;
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168 end loop;
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169
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170 -- Deal with possible last partial line
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171
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172 if N /= 0 then
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173 Line_Buf (AIL + 3 * 16 + 2 + N) := '"';
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174 GNAT.IO.Put_Line (Line_Buf (1 .. AIL + 3 * 16 + 2 + N));
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175 end if;
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176 end;
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177 end Dump;
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178
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179 end GNAT.Memory_Dump;
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