[gforth] / gforth / backtrac.fs  

gforth: gforth/backtrac.fs

Diff for /gforth/backtrac.fs between version 1.4 and 1.14

version 1.4, Sat Sep 23 15:46:51 2000 UTC version 1.14, Sun Oct 8 11:30:55 2006 UTC
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Line 1 
 \ backtrace handling  \ backtrace handling
   
 \ Copyright (C) 1999,2000 Free Software Foundation, Inc.  \ Copyright (C) 1999,2000,2003,2004 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
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 \ backtrace stuff  \ backtrace stuff
   
 create backtrace-rs-buffer buffer% %allot \ copy of the return stack at throw  create backtrace-rs-buffer buffer% %allot drop
   \ copy of the return stack at throw
   
 : init-backtrace ( -- )  : init-backtrace ( -- )
     backtrace-rs-buffer init-buffer ;      backtrace-rs-buffer init-buffer ;
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     else \ throw by signal handler with insufficient information      else \ throw by signal handler with insufficient information
         handler @ cell - \ beyond that we know nothing          handler @ cell - \ beyond that we know nothing
     then      then
     backtrace-rp0 @ [ 2 cells ]L - over - 0 max ;      backtrace-rp0 @ [ 1 cells ]L - over - 0 max ;
   
 :noname ( -- )  :noname ( -- )
     backtrace-empty @  
     if  
         backtrace-return-stack          backtrace-return-stack
         dup backtrace-rs-buffer adjust-buffer          dup backtrace-rs-buffer adjust-buffer
         backtrace-rs-buffer buffer-address @ swap move      backtrace-rs-buffer buffer-address @ swap move ;
         backtrace-empty off  
     then ;  
 IS store-backtrace  IS store-backtrace
   
 : print-backtrace ( addr1 addr2 -- )  : print-bt-entry ( return-stack-item -- )
     \G print a backtrace for the return stack addr1..addr2  
     cr ." Backtrace:"  
     swap u+do  
         cr  
         i @ dup hex. ( return-addr? )  
         cell - dup in-dictionary? over dup aligned = and          cell - dup in-dictionary? over dup aligned = and
         if          if
             @ look          @ dup threaded>name dup if
               .name drop
           else
               drop dup look if
                   .name drop
               else
                   drop body> look \ !! check for "call" in cell before?
             if              if
                 .name                  .name
             else              else
                 drop                  drop
             then              then
               then
           then
         else          else
             drop              drop
         then      then ;
   
   : print-backtrace ( addr1 addr2 -- )
       \G print a backtrace for the return stack addr1..addr2
       cr ." Backtrace:"
       swap u+do
           cr
           i @ dup hex. ( return-addr? )
           print-bt-entry
         cell +loop ;          cell +loop ;
   
 :noname ( -- )  :noname ( -- )
     backtrace-rs-buffer 2@ over + print-backtrace ;      backtrace-rs-buffer 2@ over + print-backtrace ;
 IS dobacktrace  IS dobacktrace
   
   [ifdef] defer-default
   :noname
       r@ >stderr cr ." deferred word " print-bt-entry ." is uninitialized" ;
   is defer-default
   [then]

Generate output suitable for use with a patch program
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Removed from v.1.4  
changed lines
  Added in v.1.14
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