Re: [PATCH] Support gzip compressed exec and core files in gdb

Alan Modra
2015-03-12T00:08:31Z

On Wed, Mar 11, 2015 at 07:56:30AM -0700, Michael Eager wrote:
> On 03/11/15 01:14, Alan Modra wrote:
> >On Tue, Mar 10, 2015 at 04:01:42PM -0700, Michael Eager wrote:
> >>This operation cannot be done completely by BFD because BFD allows an opened
> >>file to be passed to it for processing. GDB uses this functionality.
> >
> >I'd prefer you do this entirely outside of BFD, without adding another
> >field to struct bfd. I think that can be done by simply clearing
> >abfd->cacheable on files you uncompress. This prevents BFD from
> >closing the file, so you won't need to open it again.
>
> GDB closes the exec file, then uses BFD to seek (I think when reading
> syms). BFD then re-opens the file, so it needs the name of the
> uncompressed file.

Really? I think it quite unclean if gdb expects BFD to reopen a file
that gdb has closed!

--
Alan Modra
Australia Development Lab, IBM