Annotation of gforth/debugs.fs, revision 1.1
1.1 ! anton 1: \ Simple debugging aids
! 2:
! 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:
! 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:
! 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 #>).
! 36:
! 37: require source.fs
! 38:
! 39: defer printdebugdata ( -- ) \ gforth
! 40: ' .s IS printdebugdata
! 41: defer printdebugline ( addr -- ) \ gforth
! 42:
! 43: : (printdebugline) ( addr -- )
! 44: cr print-sourcepos ." :"
! 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
! 54: r> sourcepos drop + >r ;
! 55:
! 56: : ~~ ( compilation -- ; run-time -- ) \ gforth tilde-tilde
! 57: POSTPONE (~~) sourcepos, ; immediate
! 58:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>