Dmitry V. Levin ldv at altlinux.org
Wed Jan 18 19:46:54 UTC 2012

On Wed, Jan 18, 2012 at 03:56:38PM +0100, Denys Vlasenko wrote:
> So, why we even have TCB_SIGTRAPPED? No one knows. It predates
> version control: this code was present in the initial commit,
> in 1999.
> Moreover, TCB_SIGTRAPPED is not used in sys_rt_sigaction,
> only in obsolete sys_signal, sys_sigaction, sys_sigsetmask,
> and in some dead non-Linux code.
> I think whatever bug it was fixing is gone long ago -
> at least as long as sys_rt_sigaction is used by glibc.
> Again, since glibc (and uclibc) uses sys_rt_sigaction
> and sys_sigprocmask, modified code paths are not used
> by most programs anyway.

Looks reasonable.  Let's see whether this TCB_SIGTRAPPED thing will
strike us back or not.

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