PERF_EVENT_IOC_MODIFY_ATTRIBUTES
case PERF_EVENT_IOC_MODIFY_ATTRIBUTES: {
case _IOC_NR(PERF_EVENT_IOC_MODIFY_ATTRIBUTES):
ret = ioctl(fd, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, &attr);
ret = ioctl(fd[0], PERF_EVENT_IOC_MODIFY_ATTRIBUTES, &attr_mod);
ret = ioctl(fd, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, &new_attr);
EXPECT_EQ(ioctl(self->fd, PERF_EVENT_IOC_MODIFY_ATTRIBUTES, &new_attr), 0);