Re: Advice on debuging the fork syscall hanging forever

[Miguel Freitas]

On 4/25/07, Miguel Freitas <mfreitas@xxxxxxxxx> wrote:
> hey, could it be that this -513 is actually -ERESTARTNOINTR?

if so, that would be a good explanation why it hangs.

- copy_process() checks for pending signals, then set retval =
-ERESTARTNOINTR and returns.

- handle_signal has the following code:

                       case -ERESTARTNOINTR:
                               regs->rax = regs->orig_rax;
                               regs->rip -= 2;
                               break;

looks like it will keep trying to reenter the syscall forever,
subtracting 2 from ip will restart the syscall. by some reason the
signal is never really handled.

Miguel
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