1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
\ DEBUG.FS Debugger 12jun93jaw
\ Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
\ This file is part of Gforth.
\ Gforth is free software; you can redistribute it and/or
\ modify it under the terms of the GNU General Public License
\ as published by the Free Software Foundation; either version 2
\ of the License, or (at your option) any later version.
\ This program is distributed in the hope that it will be useful,
\ but WITHOUT ANY WARRANTY; without even the implied warranty of
\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\ GNU General Public License for more details.
\ You should have received a copy of the GNU General Public License
\ along with this program; if not, write to the Free Software
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
decimal
VARIABLE dbg-ip \ istruction pointer for debugger
: scanword ( body -- )
c-init C-Output off
ScanMode c-pass !
dup MakePass
0 Level !
0 XPos !
DisplayMode c-pass !
MakePass
C-Output on ;
: .n 0 <# # # # # #S #> ctype bl cemit ;
: d.s ." [ " depth . ." ] "
depth 4 min dup 0 ?DO dup i - pick .n LOOP drop ;
: NoFine XPos off YPos off
NLFlag off Level off
C-Formated off
;
: disp-step
DisplayMode c-pass ! \ change to displaymode
cr
c-stop off
Base @ hex dbg-ip @ 8 u.r space dbg-ip @ @ 8 u.r space
Base !
NoFine 10 XPos !
dbg-ip @ DisplayMode c-pass ! Analyse drop
25 XPos @ - 0 max spaces ." -> " ;
: get-next ( -- n | n n )
DebugMode c-pass !
dbg-ip @ Analyse ;
: jump ( addr -- )
r> drop \ discard last ip
>r ;
AVARIABLE DebugLoop
: breaker r> 1 cells - dbg-ip ! DebugLoop @ jump ;
CREATE BP 0 , 0 ,
CREATE DT 0 , 0 ,
: set-bp ( 0 n | 0 n n -- )
0. BP 2!
?dup IF dup BP ! dup @ DT !
['] Breaker swap !
?dup IF dup BP cell+ ! dup @ DT cell+ !
['] Breaker swap ! drop THEN
THEN ;
: restore-bp ( -- )
BP @ ?dup IF DT @ swap ! THEN
BP cell+ @ ?dup IF DT cell+ @ swap ! THEN ;
VARIABLE Body
: NestXT ( xt -- true | body false )
\ special deal for create does> words
\ leaves body address on the stack
dup >does-code IF dup >body swap THEN
DebugMode c-pass ! C-Output off
xt-see C-Output on
c-pass @ DebugMode = dup
IF ." Cannot debug" cr
THEN ;
VARIABLE Nesting
: Leave-D
C-Formated on
C-Output on ;
VARIABLE Unnest
: D-KEY ( -- flag )
BEGIN
Unnest @ IF 0 ELSE key THEN
CASE [char] n OF dbg-ip @ @ NestXT EXIT ENDOF
[char] s OF Leave-D
-128 THROW ENDOF
[char] a OF Leave-D
-128 THROW ENDOF
[char] d OF Leave-D
cr ." Done..." cr
Nesting off
r> drop dbg-ip @ >r
EXIT ENDOF
[char] ? OF cr ." Nest Stop Done Unnest" cr
ENDOF
[char] u OF Unnest on true EXIT ENDOF
drop true EXIT
ENDCASE
AGAIN ;
: (debug) ( body -- )
0 Nesting !
BEGIN Unnest off
cr ." Scanning code..." cr C-Formated on
dup scanword dbg-ip !
cr ." Nesting debugger ready!" cr
BEGIN d.s disp-step D-Key
WHILE C-Stop @ 0=
WHILE 0 get-next set-bp
dbg-ip @ jump
[ here DebugLoop ! ]
restore-bp
REPEAT
Nesting @ 0= IF EXIT THEN
-1 Nesting +! r>
ELSE
dbg-ip @ 1 cells + >r 1 Nesting +!
THEN
AGAIN ;
: dbg \ gforth
' NestXT IF EXIT THEN (debug) Leave-D ;
has? compiler [IF]
: break: \ gforth
r> ['] (debug) >body >r ;
: (break")
cr
." BREAK AT: " type cr
r> ['] (debug) >body >r ;
: break" \ gforth
postpone s"
postpone (break") ; immediate
[THEN]
|
