File:  [gforth] / gforth / debug.fs
Revision 1.17: download - view: text, annotated - select for diffs
Sat Sep 23 15:46:52 2000 UTC (21 years, 10 months ago) by anton
Branches: MAIN
CVS tags: v0-5-0, HEAD
changed FSF address in copyright messages

    1: \ DEBUG.FS     Debugger                                12jun93jaw
    2: 
    3: \ Copyright (C) 1995,1996,1997,2000 Free Software Foundation, Inc.
    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
   19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: decimal
   22: 
   23: VARIABLE dbg-ip     \ instruction pointer for debugger
   24: 
   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: 
   35: : scanword ( body -- )
   36:         >r save-see-flags r>
   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
   44:         restore-see-flags ;
   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: 
   56: : Leave-D ;
   57: 
   58: : disp-step ( -- )
   59: \ display step at current dbg-ip
   60:         DisplayMode c-pass !            \ change to displaymode
   61:         cr
   62:         c-stop off
   63:         Base @ hex dbg-ip @ 8 u.r space dbg-ip @ @ 8 u.r space
   64:         Base !
   65:         save-see-flags
   66:         NoFine 10 XPos !
   67:         dbg-ip @ DisplayMode c-pass ! Analyse drop
   68:         25 XPos @ - 0 max spaces ." -> " 
   69:         restore-see-flags ;
   70: 
   71: : get-next ( -- n | n n )
   72:         DebugMode c-pass !
   73:         dbg-ip @ Analyse ;
   74: 
   75: : jump          ( addr -- )
   76:                 r> drop \ discard last ip
   77:                 >r ;
   78: 
   79: AVARIABLE DebugLoop
   80: 
   81: : breaker      r> 1 cells - dbg-ip ! DebugLoop @ jump ;
   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 !