[PATCH] gdb: do not add const sections to the section map

[Tom Tromey]

>>>>> Ilya Leoshkevich <iii@linux.ibm.com> writes:

> From: Ulrich Weigand <ulrich.weigand@de.ibm.com>
> build_objfile_section_table () creates four synthetic sections, which
> significantly slow down section map sorting.  This is especially
> noticeable when debugging JITs that report a lot of objfiles.  Since
> these sections are not useful for find_pc_section (), do not add them
> to the section map.

How does it slow down the sorting?

It seems a little strange at least to drop the *ABS* section, since IIUC
that's for symbols that specify some kind of absolute address.  Couldn't
these matter for lookup purposes?  It's probable I don't really know
what's going on here...

I wonder if we can drop all support for all these sections from gdb.

Tom