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) 2003-2014, 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
32with System;                  use System;
33with System.Img_BIU;          use System.Img_BIU;
34with System.Storage_Elements; use System.Storage_Elements;
35
36with GNAT.IO;              use GNAT.IO;
37with GNAT.Debug_Utilities; use GNAT.Debug_Utilities;
38
39with Ada.Unchecked_Conversion;
40
41package body GNAT.Memory_Dump is
42
43   ----------
44   -- Dump --
45   ----------
46
47   procedure Dump
48     (Addr   : Address;
49      Count  : Natural)
50   is
51   begin
52      Dump (Addr, Count, Prefix => Absolute_Address);
53   end Dump;
54
55   procedure Dump
56     (Addr   : Address;
57      Count  : Natural;
58      Prefix : Prefix_Type)
59   is
60      Ctr : Natural := Count;
61      --  Count of bytes left to output
62
63      Offset_Buf  : String (1 .. Standard'Address_Size / 4 + 4);
64      Offset_Last : Natural;
65      --  Buffer for prefix in Offset mode
66
67      Adr : Address := Addr;
68      --  Current address
69
70      N : Natural := 0;
71      --  Number of bytes output on current line
72
73      C : Character;
74      --  Character at current storage address
75
76      AIL : Natural;
77      --  Number of chars in prefix (including colon and space)
78
79      Line_Len : Natural;
80      --  Line length for entire line
81
82      Hex : constant array (0 .. 15) of Character := "0123456789ABCDEF";
83
84      type Char_Ptr is access all Character;
85
86      function To_Char_Ptr is new Ada.Unchecked_Conversion (Address, Char_Ptr);
87
88   begin
89      case Prefix is
90         when Absolute_Address =>
91            AIL := Address_Image_Length - 4 + 2;
92
93         when Offset =>
94            Offset_Last := Offset_Buf'First - 1;
95            Set_Image_Based_Integer (Ctr, 16, 0, Offset_Buf, Offset_Last);
96            AIL := Offset_Last - 4 + 2;
97
98         when None =>
99            AIL := 0;
100      end case;
101
102      Line_Len := AIL + 3 * 16 + 2 + 16;
103
104      declare
105         Line_Buf : String (1 .. Line_Len);
106
107      begin
108         while Ctr /= 0 loop
109
110            --  Start of line processing
111
112            if N = 0 then
113               case Prefix is
114                  when Absolute_Address =>
115                     declare
116                        S : constant String := Image (Adr);
117                     begin
118                        Line_Buf (1 .. AIL) := S (4 .. S'Length - 1) & ": ";
119                     end;
120
121                  when Offset =>
122                     declare
123                        Last : Natural := 0;
124                        Len  : Natural;
125
126                     begin
127                        Set_Image_Based_Integer
128                          (Count - Ctr, 16, 0, Offset_Buf, Last);
129                        Len := Last - 4;
130
131                        Line_Buf (1 .. AIL - Len - 2) := (others => '0');
132                        Line_Buf (AIL - Len - 1 .. AIL - 2) :=
133                          Offset_Buf (4 .. Last - 1);
134                        Line_Buf (AIL - 1 .. AIL) := ": ";
135                     end;
136                  when None =>
137                     null;
138               end case;
139
140               Line_Buf (AIL + 1 .. Line_Buf'Last) := (others => ' ');
141               Line_Buf (AIL + 3 * 16 + 1) := '"';
142            end if;
143
144            --  Add one character to current line
145
146            C := To_Char_Ptr (Adr).all;
147            Adr := Adr + 1;
148            Ctr := Ctr - 1;
149
150            Line_Buf (AIL + 3 * N + 1) := Hex (Character'Pos (C) / 16);
151            Line_Buf (AIL + 3 * N + 2) := Hex (Character'Pos (C) mod 16);
152
153            if C < ' ' or else C = Character'Val (16#7F#) then
154               C := '?';
155            end if;
156
157            Line_Buf (AIL + 3 * 16 + 2 + N) := C;
158            N := N + 1;
159
160            --  End of line processing
161
162            if N = 16 then
163               Line_Buf (Line_Buf'Last) := '"';
164               GNAT.IO.Put_Line (Line_Buf);
165               N := 0;
166            end if;
167         end loop;
168
169         --  Deal with possible last partial line
170
171         if N /= 0 then
172            Line_Buf (AIL + 3 * 16 + 2 + N) := '"';
173            GNAT.IO.Put_Line (Line_Buf (1 .. AIL + 3 * 16 + 2 + N));
174         end if;
175      end;
176   end Dump;
177
178end GNAT.Memory_Dump;
179