Annotation of gforth/debug.fs, revision 1.17
1.1 anton 1: \ DEBUG.FS Debugger 12jun93jaw
2:
1.16 anton 3: \ Copyright (C) 1995,1996,1997,2000 Free Software Foundation, Inc.
1.4 anton 4:
5: \ This file is part of Gforth.
6:
7: \ Gforth is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
11:
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16:
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
1.17 ! anton 19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.4 anton 20:
1.1 anton 21: decimal
22:
1.14 crook 23: VARIABLE dbg-ip \ instruction pointer for debugger
1.1 anton 24:
1.15 jwilke 25: \ !! move to see?
26:
27: : save-see-flags ( -- n* cnt )
28: C-Output @
29: C-Formated @ 1 ;
30:
31: : restore-see-flags ( n* cnt -- )
32: drop C-Formated !
33: C-Output ! ;
34:
1.1 anton 35: : scanword ( body -- )
1.15 jwilke 36: >r save-see-flags r>
1.1 anton 37: c-init C-Output off
38: ScanMode c-pass !
39: dup MakePass
40: 0 Level !
41: 0 XPos !
42: DisplayMode c-pass !
43: MakePass
1.15 jwilke 44: restore-see-flags ;
1.1 anton 45:
46: : .n 0 <# # # # # #S #> ctype bl cemit ;
47:
48: : d.s ." [ " depth . ." ] "
49: depth 4 min dup 0 ?DO dup i - pick .n LOOP drop ;
50:
51: : NoFine XPos off YPos off
52: NLFlag off Level off
53: C-Formated off
54: ;
55:
1.15 jwilke 56: : Leave-D ;
57:
58: : disp-step ( -- )
59: \ display step at current dbg-ip
1.1 anton 60: DisplayMode c-pass ! \ change to displaymode
61: cr
62: c-stop off
1.8 jwilke 63: Base @ hex dbg-ip @ 8 u.r space dbg-ip @ @ 8 u.r space
1.1 anton 64: Base !
1.15 jwilke 65: save-see-flags
1.1 anton 66: NoFine 10 XPos !
1.8 jwilke 67: dbg-ip @ DisplayMode c-pass ! Analyse drop
1.15 jwilke 68: 25 XPos @ - 0 max spaces ." -> "
69: restore-see-flags ;
1.1 anton 70:
71: : get-next ( -- n | n n )
72: DebugMode c-pass !
1.8 jwilke 73: dbg-ip @ Analyse ;
1.1 anton 74:
75: : jump ( addr -- )
76: r> drop \ discard last ip
77: >r ;
78:
79: AVARIABLE DebugLoop
80:
1.8 jwilke 81: : breaker r> 1 cells - dbg-ip ! DebugLoop @ jump ;
1.1 anton 82:
83: CREATE BP 0 , 0 ,
84: CREATE DT 0 , 0 ,
85:
86: : set-bp ( 0 n | 0 n n -- )
87: 0. BP 2!
88: ?dup IF dup BP ! dup @ DT !
89: ['] Breaker swap !
90: ?dup IF dup BP cell+ ! dup @ DT cell+ !
91: ['] Breaker swap ! drop THEN
92: THEN ;
93:
94: : restore-bp ( -- )
95: BP @ ?dup IF DT @ swap ! THEN
96: BP cell+ @ ?dup IF DT cell+ @ swap ! THEN ;
97:
98: VARIABLE Body
99:
100: : NestXT ( xt -- true | body false )
1.10 jwilke 101: \ special deal for create does> words
102: \ leaves body address on the stack
103: dup >does-code IF dup >body swap THEN
104:
1.1 anton 105: DebugMode c-pass ! C-Output off
1.5 anton 106: xt-see C-Output on
1.1 anton 107: c-pass @ DebugMode = dup
108: IF ." Cannot debug" cr
109: THEN ;
110:
111: VARIABLE Nesting
112:
113: VARIABLE Unnest
114:
115: : D-KEY ( -- flag )
116: BEGIN
117: Unnest @ IF 0 ELSE key THEN
1.8 jwilke 118: CASE [char] n OF dbg-ip @ @ NestXT EXIT ENDOF
1.1 anton 119: [char] s OF Leave-D
120: -128 THROW ENDOF
121: [char] a OF Leave-D
122: -128 THROW ENDOF
123: [char] d OF Leave-D
124: cr ." Done..." cr
125: Nesting off
1.8 jwilke 126: r> drop dbg-ip @ >r
1.1 anton 127: EXIT ENDOF
128: [char] ? OF cr ." Nest Stop Done Unnest" cr
129: ENDOF
130: [char] u OF Unnest on true EXIT ENDOF
131: drop true EXIT
132: ENDCASE
133: AGAIN ;
134:
1.15 jwilke 135: : (_debug) ( body ip -- )
1.1 anton 136: 0 Nesting !
137: BEGIN Unnest off
138: cr ." Scanning code..." cr C-Formated on
1.15 jwilke 139: swap scanword dbg-ip !
1.1 anton 140: cr ." Nesting debugger ready!" cr
1.10 jwilke 141: BEGIN d.s disp-step D-Key
1.1 anton 142: WHILE C-Stop @ 0=
143: WHILE 0 get-next set-bp
1.8 jwilke 144: dbg-ip @ jump
1.1 anton 145: [ here DebugLoop ! ]
146: restore-bp
147: REPEAT
1.8 jwilke 148: Nesting @ 0= IF EXIT THEN
1.1 anton 149: -1 Nesting +! r>
150: ELSE
1.8 jwilke 151: dbg-ip @ 1 cells + >r 1 Nesting +!
1.1 anton 152: THEN
1.15 jwilke 153: dup
1.1 anton 154: AGAIN ;
155:
1.15 jwilke 156: : (debug) dup (_debug) ;
157:
1.14 crook 158: : dbg ( "name" -- ) \ gforth
1.11 crook 159: ' NestXT IF EXIT THEN (debug) Leave-D ;
1.1 anton 160:
1.15 jwilke 161: : break:, ( -- )
162: lastxt postpone literal ;
163:
164: : (break:)
165: r> ['] (_debug) >body >r ;
166:
1.14 crook 167: : break: ( -- ) \ gforth
1.15 jwilke 168: break:, postpone (break:) ; immediate
1.6 anton 169:
1.7 jwilke 170: : (break")
1.11 crook 171: cr
172: ." BREAK AT: " type cr
1.15 jwilke 173: r> ['] (_debug) >body >r ;
1.6 anton 174:
1.14 crook 175: : break" ( 'ccc"' -- ) \ gforth
1.15 jwilke 176: break:,
1.11 crook 177: postpone s"
178: postpone (break") ; immediate
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