File:  [gforth] / gforth / debugs.fs
Revision 1.16: download - view: text, annotated - select for diffs
Fri Feb 23 22:33:21 2007 UTC (12 years, 4 months ago) by anton
Branches: MAIN
CVS tags: HEAD
changed >OUTFILE ... OUTFILE< to OUTFILE-EXECUTE
changed >INFILE ... INFILE< to INFILE-EXECUTE
added BASE-EXECUTE
related documentation changes

    1: \ Simple debugging aids
    2: 
    3: \ Copyright (C) 1995,1997,1999,2002,2003,2004,2005,2006 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: 
   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 print-debug-data
   40: ' .s IS printdebugdata
   41: defer .debugline ( nfile nline -- ) \ gforth print-debug-line
   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}.
   45: 
   46: : (.debugline) ( nfile nline -- )
   47:     cr .sourcepos ." :"
   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: 
   53: ' (.debugline) IS .debugline
   54: 
   55: : .debugline-stderr ( nfile nline -- )
   56:     ['] .debugline stderr outfile-execute ;
   57: 
   58: :noname ( -- )
   59:     current-sourcepos .debugline-stderr ;
   60: :noname ( compilation  -- ; run-time  -- )
   61:     compile-sourcepos POSTPONE .debugline-stderr ;
   62: interpret/compile: ~~ ( -- ) \ gforth tilde-tilde
   63: \G Prints the source code location of the @code{~~} and the stack
   64: \G contents with @code{.debugline}.
   65: 

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