Re: [PATCH] Use exec_file_find to prepend gdb_sysroot in follow_exec

[Gary Benson <gbenson@redhat.com>]

Pedro Alves wrote:
> On 04/17/2015 02:28 PM, Gary Benson wrote:
> > This commit updates follow_exec to use exec_file_find to prefix
> > the new executable's filename with gdb_sysroot rather than doing
> > it longhand.
> > 
> > Built and regtested on RHEL6.6 x86_64.
> > 
> > Ok to commit?
> 
> OK.

Thanks, I pushed it.

> > -  if (gdb_sysroot && *gdb_sysroot)
> > +  if (gdb_sysroot != NULL && *gdb_sysroot != '\0')
> >      {
> > -      char *name = alloca (strlen (gdb_sysroot)
> > -			    + strlen (execd_pathname)
> > -			    + 1);
> > +      int fd = -1;
> > +      char *name;
> >  
> > -      strcpy (name, gdb_sysroot);
> > -      strcat (name, execd_pathname);
> > -      execd_pathname = name;
> > +      name = exec_file_find (execd_pathname, &fd);
> > +      if (fd >= 0)
> > +	close (fd);
> 
> We now have at least two places that need to remember to call close.
> IWBN if we hid that close in a exec_file_find variant, so that
> callers didn't have to recall to do it.  Maybe rename exec_file_find
> to (e.g.) exec_file_find_fd and reuse the exec_file_find name, even.

Good shout.  How about I fix solib_find_1 to accept fd == NULL, and
put the closing logic in there?  That would work for solib_find too
then (I'm not sure if there are any "solib_find; close" places in
GDB but I'll look.)

Cheers,
Gary

-- 
http://gbenson.net/