SIGCHLD ignored

[Daniel Jacobowitz]

On Wed, Jun 11, 2008 at 09:21:05PM +0400, Vladimir Prus wrote:
> 
> A fellow KDevelop hacker has reported that when running kdevelop itself
> under CVS HEAD of gdb, kdevelop hangs. What happens if that kdevelop spawns
> subprocess, and then does not notice it has exited, because it never
> receives SIGCHLD. I attach a much reduced project that requires only Qt4,
> and probably an even more reduced project is possible.
> 
> If I apply the attached patch to GDB, things work fine -- but I suspect
> this 'fix' will break something else. 
> 
> Pedro, I think this SIGCHLD magic is your doing -- do you have any ideas
> how to fix it? 

linux_nat_create_inferior is already unblocking signals before
creating.  Does normal_mask contain SIGCHLD?

The approach taken (search for "signal" in fork-child.c, first
comment) may not be compatible with async...

-- 
Daniel Jacobowitz
CodeSourcery