[gentoo-user] C++ code on Gentoo

[gentoo-user] C++ code on Gentoo

[James]

Hello,

I've been given some code that compiles, but does not work correctly on
Gentoo. Here is the error message I get:

*** glibc detected *** free(): invalid next size (normal): 0x08067168 ***

The code for nvwa-0.5 was added to try to get robust debugging
(memory) working, but, alas I'm certainly not strong on C++ code,
let alone some body else's C++ code.

any ideas where I can get help (volunteers or compensated)?


private email to wireless@tampabay.rr.com is OK, or list mail


James

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Re: [gentoo-user] C++ code on Gentoo

[Bryce Verdier]

Does the code compile and work on any other machine (that doesn't have 
nvwa compiled?)?

Also, have you tried upgrade nvwa, i see from the website that .6 is out.

I don't really know how to help you, but i don't mind trying. ;)

bryce


James wrote:

>Hello,
>
>I've been given some code that compiles, but does not work correctly on
>Gentoo. Here is the error message I get:
>
>*** glibc detected *** free(): invalid next size (normal): 0x08067168 ***
>
>The code for nvwa-0.5 was added to try to get robust debugging
>(memory) working, but, alas I'm certainly not strong on C++ code,
>let alone some body else's C++ code.
>
>any ideas where I can get help (volunteers or compensated)?
>
>
>private email to wireless@tampabay.rr.com is OK, or list mail
>
>
>James
>
>  
>

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[gentoo-user] Re: C++ code on Gentoo

[Andreas Fredriksson]

On 8/16/05, James <wireless@tampabay.rr.com> wrote:

> The code for nvwa-0.5 was added to try to get robust debugging
> (memory) working, but, alas I'm certainly not strong on C++ code,
> let alone some body else's C++ code.

Try valgrind. It's an excellent memory instrumentation system which
can trace back programming mistakes with complete callstacks of the
offending site if you compile with debugging symbols. Last time I
looked, a fairly recent version was in portage.

Good luck,
Andreas

-- 
And I hate redundancy, and having different functions for the same thing.
        - Linus Torvalds on linux-kernel

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[gentoo-user] Re: C++ code on Gentoo

[James]

Bryce Verdier <btv <at> cs.pdx.edu> writes:


> Does the code compile and work on any other machine (that doesn't have 
> nvwa compiled?)?

 It compiles and runs but it does not display video to the local
gentoo linux system. The author claims it works on SUSE.

> Also, have you tried upgrade nvwa, i see from the website that .6 is out.

Well, I do not think this is the problem. If somebody knowns
what they are doing with C++, then it is a good tool, 
but I'm an old C/assembler hack.... 

> I don't really know how to help you, but i don't mind trying. ;)

I can email the sourcecode to you, compile it and see what you think. You 
can check the sourcecode and make suggestions, as the original
author may not be a real whiz either, or something is missing
from the sources, and it is only intended to run on Fedora or
Suse. I just don't know. If you or anyone will consider helping
me a little bit, send me some private email at:

wireless@tampabay.rr.com

James

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Re: [gentoo-user] Re: C++ code on Gentoo

[Uwe Thiem]

On 17 August 2005 15:18, James wrote:
> Bryce Verdier <btv <at> cs.pdx.edu> writes:
> > Does the code compile and work on any other machine (that doesn't have
> > nvwa compiled?)?
>
>  It compiles and runs but it does not display video to the local
> gentoo linux system. The author claims it works on SUSE.
>
> > Also, have you tried upgrade nvwa, i see from the website that .6 is out.
>
> Well, I do not think this is the problem. If somebody knowns
> what they are doing with C++, then it is a good tool,
> but I'm an old C/assembler hack....
>
> > I don't really know how to help you, but i don't mind trying. ;)
>
> I can email the sourcecode to you, compile it and see what you think. You
> can check the sourcecode and make suggestions, as the original
> author may not be a real whiz either, or something is missing
> from the sources, and it is only intended to run on Fedora or
> Suse. I just don't know. If you or anyone will consider helping
> me a little bit, send me some private email at:

I am quite good at C++ and may be willing to help. If you tar up the source, 
how big is the tarball? Please don't send it right away. I am sitting here in 
Africa and am connected via a percussion group. You don't want those guys die 
of exhaustion. ;-)

Uwe

-- 
95% of all programmers rate themselves among the top 5% of all software 
developers. - Linus Torvalds

http://www.uwix.iway.na (last updated: 20.06.2004)
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Re: [gentoo-user] Re: C++ code on Gentoo

[Ciaran McCreesh]

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On Wed, 17 Aug 2005 14:18:25 +0000 (UTC) James
<wireless@tampabay.rr.com> wrote:
| Bryce Verdier <btv <at> cs.pdx.edu> writes:
| > Does the code compile and work on any other machine (that doesn't
| > have nvwa compiled?)?
| 
|  It compiles and runs but it does not display video to the local
| gentoo linux system. The author claims it works on SUSE.

It works by coincidence only. He's got some invalid memory allocation
or deallocation code.

-- 
Ciaran McCreesh : Gentoo Developer (Vim, Shell tools, Fluxbox, Cron)
Mail            : ciaranm at gentoo.org
Web             : http://dev.gentoo.org/~ciaranm


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