Messages in this thread |  | | | Subject | Re: [PATCH 1/5] signal(x86_32): Improve the signal stack overflow check | | From | Harvey Harrison <> | | Date | Tue, 19 Feb 2008 21:54:07 -0800 | |
On Tue, 2008-02-19 at 18:49 -0800, Roland McGrath wrote:
> > I spent some time read you mail carefully and dig into the code again.
> > > > And yes, you are right. It's possible that SA_ONSTACK has been cleared
> > before the second signal on the same stack comes.> > It's not necessary for SA_ONSTACK to have "been cleared", by which I assume
> you mean a sigaction call with SA_ONSTACK not set in sa_flags. That is
> indeed possible, but it's not the only case your patch broke. It can just
> be a different signal whose sigaction never had SA_ONSTACK, when you are
> still on the signal stack from an earlier signal that did have SA_ONSTACK.
> > > So this patch is wrong :( . I will revise the other 4 patches.> > For 2 and 3, I would rather just wait until we unify signal.c anyway.
>
I've been looking at that, at the same time a bunch of ia32/signal.c
looks like it can go away.
Harvey
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