threads and signals

[Samuel Thibault <samuel dot thibault at ens-lyon dot org>]

Hi,

The attached program doesn't work as expected: if I run it and try to
kill it (-15), nothing seem happens. I if comment out pthread_sigmask(),
it does work as expected: the handler is called, and threads are
interrupted. What's more: if I move pthread_sigmask() after the pause()
call in the foo() function, killing works twice, but no more.

It seems like signal masks are not handled per-thread, and the source
code for pthread_sigmask seems to confirm that. This can pose problem
with signal distribution for some programs which require posix semantic
here.

Regards,
Samuel

Attachment: test.c
Description: Text document

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