What's been missing is the there is no option for synchronization as part of
the parent notification or exit processing.
What's needed, for TCore, is something like "when a process dies, signal
parents to do X and then wait on optional semaphore" before losing all the
process data to do_exit.
The big problem I've been had with TCore is that that there is no polite way
of synchronization for the dumping process with the parent and sibling
processes while they are getting a signal storm as they all go down.
I've come up with a few brutish ways to suspend these processes (with some
risk taken with semaphore locks from a maintenance point of view ;).
However; these approaches still sometimes don't get to run before some of the
There is no good way, especially on SMP setups with a large multi-threaded
applications, to guarantee the signals don't get where they are going before
the core dump data is gathered.
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