On 07/08/2012 04:35, David Holmes wrote:
The change is harmless but as far as I can see you would have to
customize the VM before this change would have any affect. The signals
involved here are the SHUTDOWNn_SIGNAL values (which for linux/solaris
are HUP, INT and TERM). JVM_RegisterSignal simply does:
case SHUTDOWN1_SIGNAL:
case SHUTDOWN2_SIGNAL:
case SHUTDOWN3_SIGNAL:
if (ReduceSignalUsage) return (void*)-1;
if (os::Linux::is_sig_ignored(sig)) return (void*)1;
}
So with -Xrs all values will get rejected as a group. As far as I can
see this is the only time that -1 will be returned to Signal.handle0
and hence the only circumstance where IllegalArgumentException will be
thrown. So without customizing the VM if any of these signals cause
IllegalArgumentException then they all will and hence having distinct
try/catch blocks for each is pointless.
Did I miss something?
I agree with David and I think this thread is just missing an
explanation as to how you ran into this. It this AIX and -Xrs is mapped
to a different set of signals, maybe it was an observation when reading
the code??
-Alan.
