From: Roland McGrath <roland@redhat.com>
To: Tom Tromey <tromey@redhat.com>
Cc: Daniel Jacobowitz <drow@false.org>, archer@sourceware.org
Subject: Re: Initial psymtab replacement results
Date: Wed, 16 Dec 2009 18:57:00 -0000 [thread overview]
Message-ID: <20091216185721.52CD1D8@magilla.sf.frob.com> (raw)
In-Reply-To: Tom Tromey's message of Wednesday, 16 December 2009 11:20:31 -0700 <m31viulr0w.fsf@fleche.redhat.com>
> I don't think so, or at least, I couldn't think of anything. Our
> current branches, including F12, check for a known GCC bug, but
> otherwise assume that if aranges exists, it is correct.
FWIW, elfutils (libdw) does use it and rely on its correctness for
address->CU lookups. But that direction of lookup is only used in
eu-addr2line and in systemtap's rarely-used numeric address probe syntax.
> There's also an issue with knowing whether it is actually complete; I
> didn't think of this until relatively recently:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42288
I think we discussed this before and I've forgotten again why that issue
matters. In the status quo there is a .debug_aranges hunk for each CU from
the beginning of the existing of the corresponding .debug_info hunk at
compile time, and that can never be "stripped" except by strip et al
that remove .debug_info along with it.
> I think this question is related to Keith's work on avoiding
> DW_AT_MIPS_linkage_name. I think the current answer is that there are
> some known missing DWARF features relating to C++. However, Keith and
> Dodji have worked on GNU extensions for at least some of these.
I take this to mean a verification of my supposition that .debug_pub*
indeed are not a generic extraction from the DIE tree as things stand.
Thanks,
Roland
next prev parent reply other threads:[~2009-12-16 18:57 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-10 21:54 Tom Tromey
2009-12-11 23:10 ` Tom Tromey
2009-12-11 23:59 ` Daniel Jacobowitz
2009-12-14 22:40 ` Tom Tromey
2009-12-14 23:09 ` Daniel Jacobowitz
2009-12-15 23:39 ` Tom Tromey
2009-12-16 3:01 ` Roland McGrath
2009-12-16 18:20 ` Tom Tromey
2009-12-16 18:57 ` Roland McGrath [this message]
2009-12-16 19:46 ` Tom Tromey
2009-12-16 19:52 ` Roland McGrath
2009-12-16 18:11 ` Daniel Jacobowitz
2009-12-16 19:31 ` Tom Tromey
2009-12-23 18:29 ` Tom Tromey
2009-12-23 18:35 ` Daniel Jacobowitz
2009-12-24 17:07 ` Tom Tromey
2010-01-06 23:05 ` Tom Tromey
2009-12-17 16:39 ` Paul Pluzhnikov
2009-12-17 16:53 ` Daniel Jacobowitz
2009-12-17 17:20 ` Paul Pluzhnikov
2009-12-17 18:16 ` Daniel Jacobowitz
2009-12-18 23:58 ` Tom Tromey
2009-12-21 13:54 ` Daniel Jacobowitz
2009-12-21 21:29 ` Tom Tromey
2009-12-15 1:04 ` Roland McGrath
2009-12-15 18:36 ` Tom Tromey
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