Re: [RFA] import drow dbxread.c fix to branch

[Elena Zannoni <ezannoni@redhat.com>]

Daniel Jacobowitz writes:
 > On Wed, Apr 03, 2002 at 11:36:06PM -0600, Michael Elizabeth Chastain wrote:
 > > DanielJ writes:
 > > > Only shows on GCC 3.1, eh?  I'll try to look at it later, but I have no
 > > > post-3.0 toolchain installed right now.  Actually, I should
 > > > investigate, to make sure it isn't a 3.1 regression...
 > > 
 > > On the next spin, I'll make a special report of regressions for gcc
 > > 3.0.4 versus gcc-3_1-branch.  You can already look at "difference by gcc"
 > > in the regular report if you want to pick up a hot spot or two.
 > > 
 > > BTW my test harness now saves the whole test directory, including all
 > > the executable files.  In fact I'll just throw some tarball up in my
 > > ftp directory in case it might help someone:
 > > 
 > >   ftp://ftp.shout.net/pub/users/mec/gdb/for-pr-gdb-381.tar.gz
 > >   ftp://ftp.shout.net/pub/users/mec/gdb/for-pr-gdb-381-src.tar.gz
 > 
 > Thanks.  It does help - that was pretty easy, actually :).  I've found
 > the bug; mi-cmd-disassemble does not recognize '0' line numbers, and it
 > needs to.  I don't know why only 3.1 triggers this.  Probably a
 > function padding thing; the end of the previous function seems to share
 > a PC with the beginning of the one being listed.  Here's a patch;
 > Andrew, how's this look?
 > 

Take a look at the way gdbtk does it, in
gdbtk/generic/gdbtk-cmd.c:gdb_disassemble_driver().
Can we adopt that solution?

(I really can't wait until we can get rid of this duplication/triplication of
disassembly code. I think I'll start cleaning some things up).

Elena

 > -- 
 > Daniel Jacobowitz                           Carnegie Mellon University
 > MontaVista Software                         Debian GNU/Linux Developer
 > 
 > 2002-04-04  Daniel Jacobowitz  <drow@mvista.com>
 > 
 > 	* mi-cmd-disas.c (mi_cmd_disassemble): Skip end-of-function
 > 	markers in the line table.
 > 
 > Index: mi/mi-cmd-disas.c
 > ===================================================================
 > RCS file: /cvs/src/src/gdb/mi/mi-cmd-disas.c,v
 > retrieving revision 1.12
 > diff -u -p -r1.12 mi-cmd-disas.c
 > --- mi-cmd-disas.c	2002/01/05 04:30:46	1.12
 > +++ mi-cmd-disas.c	2002/04/04 05:59:51
 > @@ -332,6 +332,10 @@ mi_cmd_disassemble (char *command, char 
 >  	      && le[i].pc == le[i + 1].pc)
 >  	    continue;		/* Ignore duplicates */
 >  
 > +	  /* Skip any end-of-function markers.  */
 > +	  if (le[i].line == 0)
 > +	    continue;
 > +
 >  	  mle[newlines].line = le[i].line;
 >  	  if (le[i].line > le[i + 1].line)
 >  	    out_of_order = 1;