syscall::read:entry,
syscall::write:entry,
sysinfo:::readch
/pid == $1/
{
printf("%s(%d, 0x%x, %4d)", probefunc, arg0, arg1, arg2);
}
syscall::read:return,
syscall::write:return,
sysinfo:::readch
/pid == $1/
{
printf("\t\t = %d\n", arg1);
}