From: Yao Qi <yao@codesourcery.com>
To: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: <gdb@sourceware.org>
Subject: Re: Symbol can't be found unless type 'tab'
Date: Wed, 12 Sep 2012 07:45:00 -0000 [thread overview]
Message-ID: <50503D6C.6070704@codesourcery.com> (raw)
In-Reply-To: <20120910131828.GA13062@host2.jankratochvil.net>
On 09/10/2012 09:18 PM, Jan Kratochvil wrote:
> On Mon, 10 Sep 2012 14:51:29 +0200, Yao Qi wrote:
>> > <1><2c>: Abbrev Number: 3 (DW_TAG_variable)
>> > <2d> DW_AT_name : i
>> > <2f> DW_AT_type : <0x23>
>> > <33> DW_AT_location : 0x0 (location list)
> I guess because GDB does not like such complicated location expression for
> glboal variables.
Jan, thanks for the pointer.
The "symptom" is symbol is not found in psymtab, but in symtab when I
press 'tab' which triggers converting psymtab to symtab. I wonder why
symbol 'i' is *not* included in psymtab. Examine the source of
dwarf2read.c:add_partial_symbol, especially the case block for
'DW_TAG_variable', gives me some clue, and I add attribute
DW_AT_external to symbol 'i' like this,
<1><33>: Abbrev Number: 3 (DW_TAG_variable)
<34> DW_AT_name : i
<36> DW_AT_type : <0x2a>
<3a> DW_AT_external : 1 <--- here
<3b> DW_AT_location : 0x0 (location list)
and then symbol 'i' can be found by GDB without typing extra 'tab'.
--
Yao
next prev parent reply other threads:[~2012-09-12 7:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-10 12:52 Yao Qi
2012-09-10 13:18 ` Jan Kratochvil
2012-09-12 7:45 ` Yao Qi [this message]
2012-09-12 8:07 ` Jan Kratochvil
2012-09-12 11:34 ` Yao Qi
2012-09-12 12:33 ` Jan Kratochvil
2012-09-12 13:37 ` Yao Qi
2012-09-12 13:45 ` Jan Kratochvil
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