59 static void cover_open(cover_t* cov)  in cover_open()  argument
64 	if (dup2(fd, cov->fd) < 0)  in cover_open()
65 		fail("filed to dup2(%d, %d) cover fd", fd, cov->fd);  in cover_open()
67 	if (ioctl(cov->fd, KIOSETBUFSIZE, &kCoverSize))  in cover_open()
72 				     MAP_SHARED, cov->fd, 0);  in cover_open()
75 	cov->data = mmap_ptr;  in cover_open()
76 	cov->data_end = mmap_ptr + mmap_alloc_size;  in cover_open()
79 static void cover_enable(cover_t* cov, bool collect_comps)  in cover_enable()  argument
82 	if (ioctl(cov->fd, KIOENABLE, &kcov_mode))  in cover_enable()
86 static void cover_reset(cover_t* cov)  in cover_reset()  argument
88 	*(uint64*)cov->data = 0;  in cover_reset()
91 static void cover_collect(cover_t* cov)  in cover_collect()  argument
93 	cov->size = *(uint64*)cov->data;  in cover_collect()