fork() returns on parent but not returns on child

fork() returns on parent but not returns on child

[Nir Livni]

Hi all,
I am experiencing a problem, where fork() returns succesfully on parent, but
does not return on child.
The child process simply "disappears".
I believe it might have got a SIGSEGV (if it makes any sence) before fork()
has returned.

I would like to track down this problem.
What I did so far is:
1. I tried first to make sure there are no memory overruns using few tools.
2. I tried to look at strace output, but the problem does not occur if I use
strace
3. I make a UserModeLinux machine
and now I would like to breakpoint the created child before it crashes
(assuming it really crashes)

How do I do that ?

Thanks,
Nir

Re: fork() returns on parent but not returns on child

[Nir Livni]

> How about setting up a signal handler? Makes things simpler.

Parent already has a signal handler.
Child does not reach it. It simply exists.

>
> -- Anand K.
> ----- Original Message -----
> From: "Nir Livni" <nir_l3@netvision.net.il>
> Newsgroups: mailinglists.external.linux-kernel
> To: <linux-kernel@vger.kernel.org>
> Cc: "Nir Livni" <nirl@cyber-ark.com>
> Sent: Wednesday, May 28, 2003 4:18 AM
> Subject: fork() returns on parent but not returns on child
>
>
> > Hi all,
> > I am experiencing a problem, where fork() returns succesfully on parent,
> but
> > does not return on child.
> > The child process simply "disappears".
> > I believe it might have got a SIGSEGV (if it makes any sence) before
> fork()
> > has returned.
> >
> > I would like to track down this problem.
> > What I did so far is:
> > 1. I tried first to make sure there are no memory overruns using few
> tools.
> > 2. I tried to look at strace output, but the problem does not occur if I
> use
> > strace
> > 3. I make a UserModeLinux machine
> > and now I would like to breakpoint the created child before it crashes
> > (assuming it really crashes)
> >
> > How do I do that ?
> >
> > Thanks,
> > Nir
> >
> > -
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