gcc/ada/g-memdum.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME 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) 2003-2010, AdaCore                     --
  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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with System;                  use System;
  33 with System.Storage_Elements; use System.Storage_Elements;
  34
  35 with GNAT.IO;              use GNAT.IO;
  36 with GNAT.Debug_Utilities; use GNAT.Debug_Utilities;
  37
  38 with Ada.Unchecked_Conversion;
  39
  40 package body GNAT.Memory_Dump is
  41
  42    ----------
  43    -- Dump --
  44    ----------
  45
  46    procedure Dump (Addr : System.Address; Count : Natural) is
  47       Ctr : Natural := Count;
  48       --  Count of bytes left to output
  49
  50       Adr : Address := Addr;
  51       --  Current address
  52
  53       N : Natural := 0;
  54       --  Number of bytes output on current line
  55
  56       C : Character;
  57       --  Character at current storage address
  58
  59       AIL : constant := Address_Image_Length - 4 + 2;
  60       --  Number of chars in initial address + colon + space
  61
  62       Line_Len : constant Natural := AIL + 3 * 16 + 2 + 16;
  63       --  Line length for entire line
  64
  65       Line_Buf : String (1 .. Line_Len);
  66
  67       Hex : constant array (0 .. 15) of Character := "0123456789ABCDEF";
  68
  69       type Char_Ptr is access all Character;
  70
  71       function To_Char_Ptr is new Ada.Unchecked_Conversion (Address, Char_Ptr);
  72
  73    begin
  74       while Ctr /= 0 loop
  75
  76          --  Start of line processing
  77
  78          if N = 0 then
  79             declare
  80                S : constant String := Image (Adr);
  81             begin
  82                Line_Buf (1 .. AIL) := S (4 .. S'Length - 1) & ": ";
  83                Line_Buf (AIL + 1 .. Line_Buf'Last) := (others => ' ');
  84                Line_Buf (AIL + 3 * 16 + 1) := '"';
  85             end;
  86          end if;
  87
  88          --  Add one character to current line
  89
  90          C := To_Char_Ptr (Adr).all;
  91          Adr := Adr + 1;
  92          Ctr := Ctr - 1;
  93
  94          Line_Buf (AIL + 3 * N + 1) := Hex (Character'Pos (C) / 16);
  95          Line_Buf (AIL + 3 * N + 2) := Hex (Character'Pos (C) mod 16);
  96
  97          if C < ' ' or else C = Character'Val (16#7F#) then
  98             C := '?';
  99          end if;
 100
 101          Line_Buf (AIL + 3 * 16 + 2 + N) := C;
 102          N := N + 1;
 103
 104          --  End of line processing
 105
 106          if N = 16 then
 107             Line_Buf (Line_Buf'Last) := '"';
 108             GNAT.IO.Put_Line (Line_Buf);
 109             N := 0;
 110          end if;
 111       end loop;
 112
 113       --  Deal with possible last partial line
 114
 115       if N /= 0 then
 116          Line_Buf (AIL + 3 * 16 + 2 + N) := '"';
 117          GNAT.IO.Put_Line (Line_Buf (1 .. AIL + 3 * 16 + 2 + N));
 118       end if;
 119
 120       return;
 121    end Dump;
 122
 123 end GNAT.Memory_Dump;