From: Tomasz Grobelny <tomasz@grobelny.oswiecenia.net>
To: Tom Tromey <tromey@redhat.com>
Cc: Sergio Durigan Junior <sergiodj@redhat.com>, <gdb@sourceware.org>
Subject: Re: sun compiler and gdb
Date: Thu, 10 May 2012 22:08:00 -0000 [thread overview]
Message-ID: <3a8ec212743662e9fb765b02c1845c90@192.168.5.248> (raw)
In-Reply-To: <87pqab93f8.fsf@fleche.redhat.com>
On Thu, 10 May 2012 14:39:07 -0600, Tom Tromey <tromey@redhat.com> wrote:
>>>>>> "Tomasz" == Tomasz Grobelny <tomasz@grobelny.oswiecenia.net>
writes:
>
> Tomasz> Reading symbols from
> /login/sg209371/gdbtest/a.out.sparc...expanding to
> Tomasz> full symbols...Die: DW_TAG_<unknown> (abbrev 9, offset 0x1bb)
>
> You want DIE 0x1bb...
>
> Tomasz> parent at offset: 0x197
>
> ... or perhaps 0x197 ...
>
> Tomasz> With the relevant portion of dwarfdump looking like this:
> Tomasz> <2>< 443> DW_TAG_SUN_class_template
>
> But this appears to be DIE 0x443.
>
Actually it is DIE 443(dec) == 1bb(hex)
When you posted output from another dwarfdump version it took me a while
to figure out that one tool is giving numbers in hex and the other in dec.
> Tomasz> Shouldn't unknown tag just be ignored?
>
> Yes, but I think what is happening is that you have one DIE which uses
> DW_AT_type to refer to another DIE, and gdb doesn't know what to do with
> the type DIE.
>
Does the above comment about dec/hex values change your analysis here?
> Tomasz> I searched for other tags that might be compiler specific and
> Tomasz> here is the list:
>
> Those are actually attributes; tags would be DW_TAG_something.
>
Thanks for pointing that out - I am new to DWARF stuff and do not yet see
the difference between attribute, tag and die.
> Tomasz> Are any of these supported or (at least) explicitly ignored by
gdb?
>
> AFAIK, no Sun extensions to DWARF are supported by gdb.
> Generally they should be ignored, but as you've seen, there are
> sometimes exceptions. My impression is that this part of gdb is not
> heavily tested.
>
I will have a look it they can somehow be removed...
--
Regards,
Tomasz Grobelny
next prev parent reply other threads:[~2012-05-10 22:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-03 3:23 Tomasz Grobelny
2012-05-03 6:50 ` Sergio Durigan Junior
2012-05-03 14:00 ` Tomasz Grobelny
2012-05-09 20:31 ` Tom Tromey
2012-05-09 22:58 ` Tomasz Grobelny
2012-05-09 23:23 ` Tomasz Grobelny
2012-05-10 13:34 ` Tom Tromey
2012-05-10 16:38 ` Tomasz Grobelny
2012-05-10 17:38 ` Tomasz Grobelny
2012-05-10 20:34 ` Tom Tromey
2012-05-10 20:39 ` Tom Tromey
2012-05-10 22:08 ` Tomasz Grobelny [this message]
2012-05-11 16:21 ` Tom Tromey
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