failed to grab pid

gistfile1.sh

$ ppriv $$
29763: -bash
flags = <none>
E: basic,dtrace_proc,dtrace_user,proc_owner
 I: basic,dtrace_proc,dtrace_user,proc_owner
 P: basic,dtrace_proc,dtrace_user,proc_owner
 L:  basic,contract_event,contract_observer,dtrace_proc,dtrace_user,file_chown,file_chown_self,
file_dac_execute,file_dac_read,file_dac_search,file_dac_write,file_owner,file_setid,ipc_dac_read,
ipc_dac_write,ipc_owner,net_bindmlp,net_icmpaccess,net_mac_aware,net_privaddr,net_rawaccess,
proc_audit,proc_chroot,proc_lock_memory,proc_owner,proc_setid,proc_taskid,sys_acct,sys_admin,
sys_audit,sys_mount,sys_nfs,sys_resource

$ /usr/ucb/ps auxwww | grep java | fgrep "XX:+ExtendedDTraceProbes" | awk '{print $1,$2}'
weblogic 1745
weblogic 27317

$ pfexec dtrace -n 'hotspot$target:::object-alloc{ @ = quantize(arg1) }' -p 1745
dtrace: failed to grab pid 1745: permission denied

$ pstack 1745
pstack: cannot examine 1745: permission denied