SYS_recv
case SYS_recv:
(code) == SYS_recv || (code) == SYS_recvfrom)
(code) == SYS_recv || (code) == SYS_recvfrom)
praddset(&traceeven, SYS_recv);
(code) == SYS_recv || (code) == SYS_recvfrom)