IBM i PASE doesn't support ITIMER_PROF

[NattyNarwhal]

Like Cygwin, this platform needs to use a real-time timer.

This was based on a patch by @kadler, but it didn't handle unsetting
the timer, so the timeout would continue to be active, triggering
hard_timeout unexpectedly. The patch is fixed to handle unsetting.

[kadler]

Thanks for fixing and pushing upstream!

[nikic]

Maybe base this off #ifndef ITIMER_PROF instead, to avoid the need to hardcode systems?

[kadler]

@nikic The problem with that is that ITIMER_PROF is actually defined on PASE. Arguably, a bug in PASE

[NattyNarwhal]

Yes, it's defined in AIX because it works there and PASE includes the AIX headers, even for functionally i doesn't implement. In this case, it doesn't, since I'm pretty sure the AIX syscall gets redirected to that function.

It might be done with an autoconf test provided it returns ENOSYS or something though.

[nikic]

Okay, in that case this looks fine to me.

[kocsismate]

I'm currently working on something related, so I'm wondering if the conditions around TIMEOUT_SIG defined in zend_signal.c should be adapted as well?

[NattyNarwhal]

I'm currently working on something related, so I'm wondering if the conditions around TIMEOUT_SIG defined in zend_signal.c should be adapted as well?

Oh, I wasn't aware of this. It'd make sense, because then that file would be unaware of handlers installed onto SIGALARM. I'll patch for this too.