[ECOS] POSIX pause() never returns

[ECOS] POSIX pause() never returns

[Hans Rosenfeld]

While running some of the POSIX package testcases I noticed that pause()
never returns. I traced this problem to this patch:
http://sourceware.org/ml/ecos-patches/2006-07/msg00014.html

What happens here is that cyg_deliver_signals() is called through
posix_asr() -> cyg_posix_signal_asr() -> cyg_deliver_signals() while the
thread is waiting in pause(). After this the thread continues in the
while loop, calling cyg_deliver_signals() again. This call will return
false since there are no more signals pending, and the thread waits
again.

I don't understand the purpose of the above patch, but reverting it
makes pause() work as expected for me.


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Re: [ECOS] POSIX pause() never returns

[Hans Rosenfeld]

On Wed, Jun 13, 2007 at 12:12:26AM +0200, Hans Rosenfeld wrote:
> What happens here is that cyg_deliver_signals() is called through
> posix_asr() -> cyg_posix_signal_asr() -> cyg_deliver_signals() while the
> thread is waiting in pause(). After this the thread continues in the
> while loop, calling cyg_deliver_signals() again. This call will return
> false since there are no more signals pending, and the thread waits
> again.

I just noticed that the same applies to sigsuspend(), but this seems to
have been this way all the time. Am I missing something here?


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