From: Vladimir Prus <ghost@cs.msu.su>
To: gdb@sources.redhat.com
Subject: Re: Formatting of function pointer value
Date: Mon, 11 Jul 2005 05:38:00 -0000 [thread overview]
Message-ID: <dat0jr$kuh$3@sea.gmane.org> (raw)
In-Reply-To: <20050708135810.GB17089@nevyn.them.org>
Daniel Jacobowitz wrote:
> On Fri, Jul 08, 2005 at 12:00:44PM +0400, Vladimir Prus wrote:
>>
>> Hello,
>> consider the following snippet:
>>
>> B* p2 = (B*)0x12345678;
>> int (*p3)(int) = (fp)0x000000AE;
>>
>> the value of p2 is printed like this:
>>
>> (gdb)info local
>> ....
>> p2 = (B *) 0xb8000540
>>
>>
>> the value of *p3 is printed like this:
>>
>> (gdb) print *p3
>> $1 = {int (int)} 0xb7ee6e9c <__DTOR_END__+4>
>>
>> I have a couple of questions:
>>
>> 1. Why in both cases the type of value is printed? There's already
>> 'whatis' command. I've checked that code and it's printed
>> unconditionally. As the result, a GDB frontend must strip the type.
>
> It is a feature, not a bug. Why is your frontend using the
> command-line interface?
Well, the debugger part in KDevelop was not written by me, so I don't know
why command-line interface, and not MI is used.
> DON'T do that! Use MI nowadays, please please
> please.
I'm sorry, but section 24 of gdb manual does not say why MI is better. Can
you give the reasons?
> The type is included because "print p2; $1 = 0x12345678" is very
> uninformative; that's how we print integers, not pointers.
I suppose that if I do "print p2" I have some idea what type of 'p2' is; I
don't print program variables at random.
- Volodya
next prev parent reply other threads:[~2005-07-11 5:38 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-08 8:02 Vladimir Prus
2005-07-08 8:51 ` Vladimir Prus
2005-07-08 13:59 ` Daniel Jacobowitz
2005-07-11 5:40 ` Vladimir Prus
2005-07-11 7:11 ` Vladimir Prus
2005-07-11 8:35 ` Andreas Schwab
2005-07-11 13:03 ` Daniel Jacobowitz
2005-07-08 13:58 ` Daniel Jacobowitz
2005-07-11 5:38 ` Vladimir Prus [this message]
2005-07-11 7:06 ` Nick Roberts
2005-07-11 7:21 ` Vladimir Prus
2005-07-11 7:42 ` Vladimir Prus
2005-07-11 13:08 ` Daniel Jacobowitz
2005-07-11 13:21 ` Vladimir Prus
2005-07-11 13:27 ` Daniel Jacobowitz
2005-07-14 8:10 ` Vladimir Prus
2005-07-11 8:08 ` Nick Roberts
2005-07-11 9:05 ` Vladimir Prus
2005-07-11 9:53 ` Nick Roberts
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='dat0jr$kuh$3@sea.gmane.org' \
--to=ghost@cs.msu.su \
--cc=gdb@sources.redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).