tools/testing/selftests/bpf/prog_tests/btf.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/btf.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/btf.c
Extension
.c
Size
233009 bytes
Lines
8358
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct btf_raw_test {
	const char *descr;
	const char *str_sec;
	const char *map_name;
	const char *err_str;
	__u32 raw_types[MAX_NR_RAW_U32];
	__u32 str_sec_size;
	enum bpf_map_type map_type;
	__u32 key_size;
	__u32 value_size;
	__u32 key_type_id;
	__u32 value_type_id;
	__u32 max_entries;
	bool btf_load_err;
	bool map_create_err;
	bool ordered_map;
	bool lossless_map;
	bool percpu_map;
	int hdr_len_delta;
	int type_off_delta;
	int str_off_delta;
	int str_len_delta;
	enum pprint_mapv_kind_t mapv_kind;
};

#define BTF_STR_SEC(str) \
	.str_sec = str, .str_sec_size = sizeof(str)

static struct btf_raw_test raw_tests[] = {
/* enum E {
 *     E0,
 *     E1,
 * };
 *
 * struct A {
 *	unsigned long long m;
 *	int n;
 *	char o;
 *	[3 bytes hole]
 *	int p[8];
 *	int q[4][8];
 *	enum E r;
 * };
 */
{
	.descr = "struct test #1",
	.raw_types = {
		/* int */
		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),	/* [1] */
		/* unsigned long long */
		BTF_TYPE_INT_ENC(0, 0, 0, 64, 8),		/* [2] */
		/* char */
		BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 8, 1),	/* [3] */
		/* int[8] */
		BTF_TYPE_ARRAY_ENC(1, 1, 8),			/* [4] */
		/* struct A { */				/* [5] */
		BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_STRUCT, 0, 6), 180),
		BTF_MEMBER_ENC(NAME_TBD, 2, 0),	/* unsigned long long m;*/
		BTF_MEMBER_ENC(NAME_TBD, 1, 64),/* int n;		*/
		BTF_MEMBER_ENC(NAME_TBD, 3, 96),/* char o;		*/
		BTF_MEMBER_ENC(NAME_TBD, 4, 128),/* int p[8]		*/
		BTF_MEMBER_ENC(NAME_TBD, 6, 384),/* int q[4][8]		*/
		BTF_MEMBER_ENC(NAME_TBD, 7, 1408), /* enum E r		*/
		/* } */
		/* int[4][8] */
		BTF_TYPE_ARRAY_ENC(4, 1, 4),			/* [6] */
		/* enum E */					/* [7] */
		BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_ENUM, 0, 2), sizeof(int)),
		BTF_ENUM_ENC(NAME_TBD, 0),
		BTF_ENUM_ENC(NAME_TBD, 1),
		BTF_END_RAW,
	},
	.str_sec = "\0A\0m\0n\0o\0p\0q\0r\0E\0E0\0E1",
	.str_sec_size = sizeof("\0A\0m\0n\0o\0p\0q\0r\0E\0E0\0E1"),
	.map_type = BPF_MAP_TYPE_ARRAY,
	.map_name = "struct_test1_map",
	.key_size = sizeof(int),
	.value_size = 180,
	.key_type_id = 1,
	.value_type_id = 5,
	.max_entries = 4,
},

/* typedef struct b Struct_B;
 *
 * struct A {
 *     int m;
 *     struct b n[4];
 *     const Struct_B o[4];
 * };

Annotation

Implementation Notes