1 // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) 2 3 /* 4 * BTF-to-C dumper tests for bitfield. 5 * 6 * Copyright (c) 2019 Facebook 7 */ 8 #include <stdbool.h> 9 10 /* ----- START-EXPECTED-OUTPUT ----- */ 11 /* 12 *struct bitfields_only_mixed_types { 13 * int a: 3; 14 * long b: 2; 15 * _Bool c: 1; 16 * enum { 17 * A = 0, 18 * B = 1, 19 * } d: 1; 20 * short e: 5; 21 * int: 20; 22 * unsigned int f: 30; 23 *}; 24 * 25 */ 26 /* ------ END-EXPECTED-OUTPUT ------ */ 27 28 struct bitfields_only_mixed_types { 29 int a: 3; 30 long b: 2; 31 bool c: 1; /* it's really a _Bool type */ 32 enum { 33 A, /* A = 0, dumper is very explicit */ 34 B, /* B = 1, same */ 35 } d: 1; 36 short e: 5; 37 /* 20-bit padding here */ 38 unsigned f: 30; /* this gets aligned on 4-byte boundary */ 39 }; 40 41 /* ----- START-EXPECTED-OUTPUT ----- */ 42 /* 43 *struct bitfield_mixed_with_others { 44 * char: 4; 45 * int a: 4; 46 * short b; 47 * long c; 48 * long d: 8; 49 * int e; 50 * int f; 51 *}; 52 * 53 */ 54 /* ------ END-EXPECTED-OUTPUT ------ */ 55 struct bitfield_mixed_with_others { 56 char: 4; /* char is enough as a backing field */ 57 int a: 4; 58 /* 8-bit implicit padding */ 59 short b; /* combined with previous bitfield */ 60 /* 4 more bytes of implicit padding */ 61 long c; 62 long d: 8; 63 /* 24 bits implicit padding */ 64 int e; /* combined with previous bitfield */ 65 int f; 66 /* 4 bytes of padding */ 67 }; 68 69 /* ----- START-EXPECTED-OUTPUT ----- */ 70 /* 71 *struct bitfield_flushed { 72 * int a: 4; 73 * long: 60; 74 * long b: 16; 75 *}; 76 * 77 */ 78 /* ------ END-EXPECTED-OUTPUT ------ */ 79 struct bitfield_flushed { 80 int a: 4; 81 long: 0; /* flush until next natural alignment boundary */ 82 long b: 16; 83 }; 84 85 int f(struct { 86 struct bitfields_only_mixed_types _1; 87 struct bitfield_mixed_with_others _2; 88 struct bitfield_flushed _3; 89 } *_) 90 { 91 return 0; 92 } 93