PSL_TRACEPOSIX_SPAWN
if ((p1->p_slflag & (PSL_TRACEPOSIX_SPAWN|PSL_TRACED)) ==
(PSL_TRACEPOSIX_SPAWN|PSL_TRACED)) {
if ((p1->p_slflag & (PSL_TRACEPOSIX_SPAWN|PSL_TRACED)) !=
(PSL_TRACEPOSIX_SPAWN|PSL_TRACED)) {
pe.pe_set_event |= ISSET(t->p_slflag, PSL_TRACEPOSIX_SPAWN) ?
SET(t->p_slflag, PSL_TRACEPOSIX_SPAWN);
CLR(t->p_slflag, PSL_TRACEPOSIX_SPAWN);