1 // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2 
3 /*
4  * BTF-to-C dumper tests for implicit and explicit padding between fields and
5  * at the end of a struct.
6  *
7  * Copyright (c) 2019 Facebook
8  */
9 /* ----- START-EXPECTED-OUTPUT ----- */
10 struct padded_implicitly {
11 	int a;
12 	long b;
13 	char c;
14 };
15 
16 /* ------ END-EXPECTED-OUTPUT ------ */
17 
18 /* ----- START-EXPECTED-OUTPUT ----- */
19 /*
20  *struct padded_explicitly {
21  *	int a;
22  *	int: 32;
23  *	int b;
24  *};
25  *
26  */
27 /* ------ END-EXPECTED-OUTPUT ------ */
28 
29 struct padded_explicitly {
30 	int a;
31 	int: 1; /* algo will explicitly pad with full 32 bits here */
32 	int b;
33 };
34 
35 /* ----- START-EXPECTED-OUTPUT ----- */
36 /*
37  *struct padded_a_lot {
38  *	int a;
39  *	long: 32;
40  *	long: 64;
41  *	long: 64;
42  *	int b;
43  *};
44  *
45  */
46 /* ------ END-EXPECTED-OUTPUT ------ */
47 
48 struct padded_a_lot {
49 	int a;
50 	/* 32 bit of implicit padding here, which algo will make explicit */
51 	long: 64;
52 	long: 64;
53 	int b;
54 };
55 
56 /* ----- START-EXPECTED-OUTPUT ----- */
57 /*
58  *struct padded_cache_line {
59  *	int a;
60  *	long: 32;
61  *	long: 64;
62  *	long: 64;
63  *	long: 64;
64  *	int b;
65  *	long: 32;
66  *	long: 64;
67  *	long: 64;
68  *	long: 64;
69  *};
70  *
71  */
72 /* ------ END-EXPECTED-OUTPUT ------ */
73 
74 struct padded_cache_line {
75 	int a;
76 	int b __attribute__((aligned(32)));
77 };
78 
79 /* ----- START-EXPECTED-OUTPUT ----- */
80 /*
81  *struct zone_padding {
82  *	char x[0];
83  *};
84  *
85  *struct zone {
86  *	int a;
87  *	short b;
88  *	short: 16;
89  *	struct zone_padding __pad__;
90  *};
91  *
92  */
93 /* ------ END-EXPECTED-OUTPUT ------ */
94 
95 struct zone_padding {
96 	char x[0];
97 } __attribute__((__aligned__(8)));
98 
99 struct zone {
100 	int a;
101 	short b;
102 	struct zone_padding __pad__;
103 };
104 
105 int f(struct {
106 	struct padded_implicitly _1;
107 	struct padded_explicitly _2;
108 	struct padded_a_lot _3;
109 	struct padded_cache_line _4;
110 	struct zone _5;
111 } *_)
112 {
113 	return 0;
114 }
115