Date: Sun, 17 Aug 2003 23:16:22 -0400 (EDT)
From: Daniel Eischen <eischen@vigrid.com>
To: Marcel Moolenaar <marcel@xcllnt.net>
Cc: David Xu <davidxu@freebsd.org>
Subject: Re: First draft: rewrite of {get|set|swap}context(3)
Message-ID: <Pine.GSO.4.10.10308172313050.29967-100000@pcnet5.pcnet.com>
In-Reply-To: <20030817231246.GA17207@dhcp42.pn.xcllnt.net>
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On Sun, 17 Aug 2003, Marcel Moolenaar wrote: > On Mon, Aug 18, 2003 at 06:47:52AM +0800, David Xu wrote: > > > > Then doesn't signal context in signal handler have a UCF_SIGMASK ? > > Yes. > > > void (*__sa_sigaction)(int, struct __siginfo *, ucontext_t *ucp); > > the context *ucp should have UCF_SIGMASK now. > > We never define uc_flags currently. We only copyout() uc_sigmask and > uc_mcontext. Hence, the uc_flags field is garbage. As is the uc_stack > field. > > > I think it should be UCF_NOSIGMASK. But for libkse, we really needn't > > this kind of hack, because M:N thread in kernel always masks all signals, > > you can always SIGFILLSET(&uc.uc_sigmask) before call set_context. > > I tried this, but it didn't fix mutex_d. I don't think the signal mask problem is the cause of mutex_d failing, but I did notice it when trying to kill the test. The mutex_d problem seems to be that either _ia64_restore_context() or _ia64_break_setcontext() are not working. -- Dan Eischen
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