xref: /illumos-gate/usr/src/test/util-tests/tests/mdb/progs/bitfields.c (revision dd72704bd9e794056c558153663c739e2012d721)
1 /*
2  * This file and its contents are supplied under the terms of the
3  * Common Development and Distribution License ("CDDL"), version 1.0.
4  * You may only use this file in accordance with the terms of version
5  * 1.0 of the CDDL.
6  *
7  * A full copy of the text of the CDDL should have accompanied this
8  * source.  A copy of the CDDL is also available via the Internet at
9  * http://www.illumos.org/license/CDDL.
10  */
11 
12 /*
13  * Copyright 2021 oxide Computer Company
14  */
15 
16 /*
17  * Test various awkward bitfield cases. In particular, where we have things that
18  * don't cross byte alignment.
19  */
20 
21 #include <stdint.h>
22 
23 typedef struct broken {
24 	uint32_t	brk_a:3;
25 	uint32_t	brk_b:2;
26 	uint32_t	brk_c:1;
27 	uint32_t	brk_d:1;
28 	uint32_t	brk_e:1;
29 	uint32_t	brk_f:1;
30 	uint32_t	brk_g:3;
31 	uint32_t	brk_h:3;
32 	uint32_t	brk_i:5;
33 	uint32_t	brk_j:4;
34 	uint32_t	brk_k:6;
35 	uint32_t	brk_l:1;
36 	uint32_t	brk_m:1;
37 } broken_t;
38 
39 broken_t first = {
40 	.brk_a = 3,
41 	.brk_b = 3,
42 	.brk_c = 0,
43 	.brk_d = 1,
44 	.brk_e = 1,
45 	.brk_f = 1,
46 	.brk_g = 3,
47 	.brk_h = 5,
48 	.brk_i = 3,
49 	.brk_j = 9,
50 	.brk_k = 19,
51 	.brk_l = 0,
52 	.brk_m = 1
53 };
54 
55 typedef struct broken6491 {
56 	unsigned short a:1;
57 	unsigned short b:8;
58 	unsigned short c:3;
59 	unsigned short d:2;
60 	unsigned short e:1;
61 	unsigned short f:1;
62 } broken6491_t;
63 
64 broken6491_t second = {
65 	.a = 1,
66 	.b = 2,
67 	.e = 1
68 };
69 
70 int
71 main(void)
72 {
73 	return (0);
74 }
75