K 10 svn:author V 3 gnn K 8 svn:date V 27 2012-04-20T16:09:28.185792Z K 7 svn:log V 197 MFC: 234234 Change SIGUSR1 to SIGTHR to properly wake up a process that is being traced. The use of SIGUSR1 caused traced processes (those attached to with dtrace -p) to exit when dtrace exited. END