gcc/ada/g-memdum.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                     G N A T . M E M O R Y _ D U M P                      --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --              Copyright (C) 2003 Ada Core Technologies, Inc.              --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with System;                  use System;
  35 with System.Storage_Elements; use System.Storage_Elements;
  36
  37 with GNAT.IO;              use GNAT.IO;
  38 with GNAT.Debug_Utilities; use GNAT.Debug_Utilities;
  39
  40 with Unchecked_Conversion;
  41
  42 package body GNAT.Memory_Dump is
  43
  44    ----------
  45    -- Dump --
  46    ----------
  47
  48    procedure Dump (Addr : System.Address; Count : Natural) is
  49       Ctr : Natural := Count;
  50       --  Count of bytes left to output
  51
  52       Adr : Address := Addr;
  53       --  Current address
  54
  55       N : Natural := 0;
  56       --  Number of bytes output on current line
  57
  58       C : Character;
  59       --  Character at current storage address
  60
  61       AIL : constant := Address_Image_Length - 4 + 2;
  62       --  Number of chars in initial address + colon + space
  63
  64       Line_Len : constant Natural := AIL + 3 * 16 + 2 + 16;
  65       --  Line length for entire line
  66
  67       Line_Buf : String (1 .. Line_Len);
  68
  69       Hex : constant array (0 .. 15) of Character := "0123456789ABCDEF";
  70
  71       type Char_Ptr is access all Character;
  72
  73       function To_Char_Ptr is new Unchecked_Conversion (Address, Char_Ptr);
  74
  75    begin
  76       while Ctr /= 0 loop
  77
  78          --  Start of line processing
  79
  80          if N = 0 then
  81             declare
  82                S : constant String := Image (Adr);
  83             begin
  84                Line_Buf (1 .. AIL) := S (4 .. S'Length - 1) & ": ";
  85                Line_Buf (AIL + 1 .. Line_Buf'Last) := (others => ' ');
  86                Line_Buf (AIL + 3 * 16 + 1) := '"';
  87             end;
  88          end if;
  89
  90          --  Add one character to current line
  91
  92          C := To_Char_Ptr (Adr).all;
  93          Adr := Adr + 1;
  94          Ctr := Ctr - 1;
  95
  96          Line_Buf (AIL + 3 * N + 1) := Hex (Character'Pos (C) / 16);
  97          Line_Buf (AIL + 3 * N + 2) := Hex (Character'Pos (C) mod 16);
  98
  99          if C < ' ' or else C = Character'Val (16#7F#) then
 100             C := '?';
 101          end if;
 102
 103          Line_Buf (AIL + 3 * 16 + 2 + N) := C;
 104          N := N + 1;
 105
 106          --  End of line processing
 107
 108          if N = 16 then
 109             Line_Buf (Line_Buf'Last) := '"';
 110             GNAT.IO.Put_Line (Line_Buf);
 111             N := 0;
 112          end if;
 113       end loop;
 114
 115       --  Deal with possible last partial line
 116
 117       if N /= 0 then
 118          Line_Buf (AIL + 3 * 16 + 2 + N) := '"';
 119          GNAT.IO.Put_Line (Line_Buf (1 .. AIL + 3 * 16 + 2 + N));
 120       end if;
 121
 122       return;
 123    end Dump;
 124
 125 end GNAT.Memory_Dump;