This is the mail archive of the gdb-patches@sources.redhat.com mailing list for the GDB project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]

Re: [Daniel Berlin <dan@cgsoftware.com>] [PATCH] Namespace support for DWARF2, take 2


Jim Blandy <jimb@zwingli.cygnus.com> writes:

> Daniel Berlin <dan@cgsoftware.com> writes:
>> Jim, you asked me to forward the gcc dwarf2 namespace patch, here's the
>> latest.
> 
> Cool, thanks.  I'll try it out.
I updated it for namespace aliases, you can find a new
gen_namespace_die function on the gcc-patches list.

> 
>> If you want to hack up the old reader to try to support namespaces, or
>> even ignore them, you have to start by copying the find_pc_bounds
>> function in the new dwarf2 reader, and using it in the right places.
>> Otherwise, you'll end up with errors about blocks being outside the
>> bounds of the symtab, etc, because namespaces are scopes without pc
>> bounds, and thus, we need to look through their children when trying
>> to determine the upper/lower pc bounds for a compile unit.
> 
> Okay.  It looks like scan_partial_symbols actually does more than just
> skim the top level of dies (to retrieve enumeration constants, for
> example), so that seems doable.  But I'll look at your find_pc_bounds
> function, too.

It's not scan_partial you need it for, it's (in the old reader) in
psymtab_to_symtab_1, the part that says "/* Some compilers don't
define a DW_AT_high_pc attribute for the CU.  .... synthesize it, by
scanning the DIE's below the CU. */", and read_file_scope.
Both don't scan below the immediate children.


-- 
"So I figured I'd leave the area, because I had no ties there
anyway except for this girl I was seeing.  We had conflicting
attitudes:  I really wasn't into meditating and she wasn't
really into being alive.  I told her I knew when I was going to
die because my birth certificate has an expiration date.
"-Steven Wright


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]