[Haskell-cafe] Re: syscall, sigpause and EINTR on Mac OSX

[Joel Reymont]

I looked at the scheduler source code and it appears that GHC goes to  
wait for signals when a deadlock is detected and there's nothing else  
to do.

It still does not explain where the signal comes from when I'm away  
from the keyboard.

On Dec 11, 2005, at 4:10 PM, Joel Reymont wrote:

> (gdb) where
> #0  0x90006068 in syscall ()
> #1  0x9004420c in sigpause ()
> #2  0x001791b8 in awaitUserSignals () at Signals.c:256
> #3  0x0012e1a8 in schedule (mainThread=0x1300360,  
> initialCapability=0x0) at Schedule.c:518
> [...]
> My program is currently stuck here. The man pages say that sigpause  
> will only terminate by being interrupted and EINTR will be the  
> errno. EINTR is signal 2, the same one that I'm trapping and the  
> one sent when ^C is pressed.

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