Return to debugging.fs CVS log

Up to [gforth] / gforth

Annotation of gforth/debugging.fs, revision 1.4

1.1       anton       1: \ Simple debugging aids
                      2: 
1.4     ! anton       3: \ Copyright (C) 1995 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., 675 Mass Ave, Cambridge, MA 02139, USA.
        !            20: 
        !            21: 
1.1       anton      22: \ They are meant to support a different style of debugging than the
                     23: \ tracing/stepping debuggers used in languages with long turn-around
                     24: \ times.
                     25: 
                     26: \ IMO, a much better (faster) way in fast-compilig languages is to add
                     27: \ printing code at well-selected places, let the program run, look at
                     28: \ the output, see where things went wrong, add more printing code, etc.,
                     29: \ until the bug is found.
                     30: 
                     31: \ We support fast insertion and removal of the printing code.
                     32: 
1.2       anton      33: \ !!Warning: the default debugging actions will destroy the contents
                     34: \ of the pictured numeric output string (i.e., don't use ~~ between <#
                     35: \ and #>).
1.1       anton      36: 
1.4     ! anton      37: require source.fs
1.1       anton      38: 
1.3       anton      39: defer printdebugdata ( -- ) \ gforth
1.1       anton      40: ' .s IS printdebugdata
1.3       anton      41: defer printdebugline ( addr -- ) \ gforth
1.1       anton      42: 
                     43: : (printdebugline) ( addr -- )
1.4     ! anton      44:     cr print-sourcepos ." :"
1.1       anton      45:     \ it would be nice to print the name of the following word,
                     46:     \ but that's not easily possible for primitives
                     47:     printdebugdata
                     48:     cr ;
                     49: 
                     50: ' (printdebugline) IS printdebugline
                     51: 
                     52: : (~~) ( -- )
                     53:     r@ printdebugline
1.4     ! anton      54:     r> sourcepos drop + >r ;
1.1       anton      55: 
1.3       anton      56: : ~~ ( compilation  -- ; run-time  -- ) \ gforth tilde-tilde
1.4     ! anton      57:     POSTPONE (~~) sourcepos, ; immediate
1.1       anton      58: