Symbol: PT_GETNUMLWPS
sys/kern/sys_process.c
1575
case PT_GETNUMLWPS:
usr.bin/gcore/elfcore.c
344
threads = ptrace(PT_GETNUMLWPS, pid, NULL, 0);
usr.bin/truss/setup.c
300
nlwps = ptrace(PT_GETNUMLWPS, p->pid, NULL, 0);