[libc-alpha] mt-application hanging in exit()

[Bertold Kolics]

Hallo Andreas,

>> Then we must have a problem. I can reproduce it each & every time. I have run
>> my app under strace using microsec timestamping, and I could see the restart
>> signal arriving before the signal mask modification is done inside suspend().
>
>Please send a *small* program that shows the problem,

I may have found the problem, but I still believe that there is a problem in glibc.

Before setting up the signal handlers, I used to clear the signal mask of the process.
If this is the case, the application hangs. Otherwise, everything is OK.

Then, I took a look at which signal is set before clearing the mask (sigismember())
and found that SIGRTMIN is set.

I understand the SIGRTMIN is the restart signal. What I don't understand is that
why it affects the termination of the program if I clear the mask before creating
any thread.

Attached is a small program (source & binary).

If you invoke it with '0' as an argument, it will not clear the signal mask of the process.
Otherwise, it will be cleared.

Thanks for your assistance.

Tschuss,
Bertold Kolics
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