there are two kinds of wait4 calls, one that gets the WIFSTOPPED event
from the debugged task, for this the traced task has to be in the
debugger's ->children list.
Another one is when a debugged task exits and its parent wants the exit
event. But in this case the task is untraced already, so it gets back into
the parent's ->children list.
ie. wait4 should only look at the ->children list - zombies (or traced
tasks debugged by this task) can only be there.
The only addition is that in the wait4 non-blocking case we need to look
at the traced list as well - since a non-blocking wait4 is a 'could there
be any children exiting' kind of query.
Ingo
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This archive was generated by hypermail 2b29 : Sat Sep 07 2002 - 22:00:27 EST