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|
\ DEBUG.FS Debugger 12jun93jaw
\ Copyright (C) 1995,1996,1997,2000,2003,2004,2007 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 3
\ 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, see http://www.gnu.org/licenses/.
require see.fs
decimal
VARIABLE dbg-ip \ instruction pointer for debugger
\ !! move to see?
: save-see-flags ( -- n* cnt )
C-Output @
C-Formated @ 1 ;
: restore-see-flags ( n* cnt -- )
drop C-Formated !
C-Output ! ;
: scanword ( body -- )
>r save-see-flags r>
c-init C-Output off
ScanMode c-pass !
dup MakePass
0 Level !
0 XPos !
DisplayMode c-pass !
MakePass
restore-see-flags ;
: .n ( 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 ;
: Leave-D ( -- ) ;
: disp-step ( -- )
\ display step at current dbg-ip
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 !
save-see-flags
NoFine 10 XPos !
dbg-ip @ DisplayMode c-pass ! Analyse drop
25 XPos @ - 0 max spaces ." -> "
restore-see-flags ;
: get-next ( -- n | n n )
DebugMode c-pass !
dbg-ip @ Analyse ;
: jump ( addr -- )
r> drop \ discard last ip
>r ;
AVARIABLE DebugLoop
1 cells Constant breaker-size \ !!! dependency: ITC
: breaker ( R:body -- )
r> breaker-size - dbg-ip ! DebugLoop @ jump ;
CREATE BP 0 , 0 ,
CREATE DT 0 , 0 ,
: set-bp ( 0 n | 0 n n -- ) \ !!! dependency: ITC
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 ( -- ) \ !!! dependency: ITC
BP @ ?dup IF DT @ swap ! THEN
BP cell+ @ ?dup IF DT cell+ @ swap ! THEN ;
VARIABLE Body
: nestXT-checkSpecial ( xt -- xt2 | cfa xt2 )
dup ['] call = IF
drop dbg-ip @ cell+ @ body> EXIT
THEN
dup >does-code IF
\ if nest into a does> we must leave
\ the body address on stack as does> does...
dup >body swap EXIT
THEN
dup ['] EXECUTE = IF
\ xt to EXECUTE is next stack item...
drop EXIT
THEN
dup ['] PERFORM = IF
\ xt to EXECUTE is addressed by next stack item
drop @ EXIT
THEN
BEGIN
dup >code-address dodefer: =
WHILE
\ load xt of DEFERed word
cr ." nesting defered..."
>body @
REPEAT ;
: nestXT ( xt -- true | body false )
\G return true if we are not able to debug this,
\G body and false otherwise
nestXT-checkSpecial
\ scan code with xt-see
DebugMode c-pass ! C-Output off
xt-see C-Output on
c-pass @ DebugMode = dup
IF cr ." Cannot debug!!"
THEN ;
VARIABLE Nesting
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 ip -- )
0 Nesting !
BEGIN Unnest off
cr ." Scanning code..." cr C-Formated on
swap 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
get-next >r 1 Nesting +!
THEN
dup
AGAIN ;
: (debug) dup (_debug) ;
: dbg ( "name" -- ) \ gforth
' NestXT IF EXIT THEN (debug) Leave-D ;
: break:, ( -- )
latestxt postpone literal ;
: (break:)
r> ['] (_debug) >body >r ;
: break: ( -- ) \ gforth
break:, postpone (break:) ; immediate
: (break")
cr
." BREAK AT: " type cr
r> ['] (_debug) >body >r ;
: break" ( 'ccc"' -- ) \ gforth
break:,
postpone s"
postpone (break") ; immediate
|
