File:  [gforth] / gforth / debugs.fs
Revision 1.18: download - view: text, annotated - select for diffs
Mon Dec 31 18:40:23 2007 UTC (11 years, 8 months ago) by anton
Branches: MAIN
CVS tags: v0-7-0, HEAD
updated copyright notices for GPL v3

    1: \ Simple debugging aids
    2: 
    3: \ Copyright (C) 1995,1997,1999,2002,2003,2004,2005,2006,2007 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 3
   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, see http://www.gnu.org/licenses/.
   19: 
   20: 
   21: \ They are meant to support a different style of debugging than the
   22: \ tracing/stepping debuggers used in languages with long turn-around
   23: \ times.
   24: 
   25: \ IMO, a much better (faster) way in fast-compilig languages is to add
   26: \ printing code at well-selected places, let the program run, look at
   27: \ the output, see where things went wrong, add more printing code, etc.,
   28: \ until the bug is found.
   29: 
   30: \ We support fast insertion and removal of the printing code.
   31: 
   32: \ !!Warning: the default debugging actions will destroy the contents
   33: \ of the pictured numeric output string (i.e., don't use ~~ between <#
   34: \ and #>).
   35: 
   36: require source.fs
   37: 
   38: defer printdebugdata ( -- ) \ gforth print-debug-data
   39: ' .s IS printdebugdata
   40: defer .debugline ( nfile nline -- ) \ gforth print-debug-line
   41: \G Print the source code location indicated by @var{nfile nline}, and
   42: \G additional debugging information; the default @code{.debugline}
   43: \G prints the additional information with @code{printdebugdata}.
   44: 
   45: : (.debugline) ( nfile nline -- )
   46:     cr .sourcepos ." :"
   47:     \ it would be nice to print the name of the following word,
   48:     \ but that's not easily possible for primitives
   49:     printdebugdata
   50:     cr ;
   51: 
   52: ' (.debugline) IS .debugline
   53: 
   54: : .debugline-stderr ( nfile nline -- )
   55:     ['] .debugline stderr outfile-execute ;
   56: 
   57: :noname ( -- )
   58:     current-sourcepos .debugline-stderr ;
   59: :noname ( compilation  -- ; run-time  -- )
   60:     compile-sourcepos POSTPONE .debugline-stderr ;
   61: interpret/compile: ~~ ( -- ) \ gforth tilde-tilde
   62: \G Prints the source code location of the @code{~~} and the stack
   63: \G contents with @code{.debugline}.
   64: 

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