Annotation of gforth/debugs.fs, revision 1.12
1.1 anton 1: \ Simple debugging aids
2:
1.11 anton 3: \ Copyright (C) 1995,1997,1999,2002,2003,2004 Free Software Foundation, Inc.
1.1 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
1.6 anton 19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1 anton 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:
1.4 crook 39: defer printdebugdata ( -- ) \ gforth print-debug-data
1.1 anton 40: ' .s IS printdebugdata
1.7 anton 41: defer .debugline ( nfile nline -- ) \ gforth print-debug-line
1.10 anton 42: \G Print the source code location indicated by @var{nfile nline}, and
43: \G additional debugging information; the default @code{.debugline}
44: \G prints the additional information with @code{printdebugdata}.
1.1 anton 45:
1.7 anton 46: : (.debugline) ( nfile nline -- )
47: cr .sourcepos ." :"
1.1 anton 48: \ it would be nice to print the name of the following word,
49: \ but that's not easily possible for primitives
50: printdebugdata
51: cr ;
52:
1.7 anton 53: ' (.debugline) IS .debugline
1.1 anton 54:
1.10 anton 55: :noname ( -- )
56: current-sourcepos .debugline ;
57: :noname ( compilation -- ; run-time -- )
58: compile-sourcepos POSTPONE .debugline ;
1.12 ! anton 59: interpret/compile: ~~ ( -- ) \ gforth tilde-tilde
1.10 anton 60: \G Prints the source code location of the @code{~~} and the stack
61: \G contents with @code{.debugline}.
62:
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