tools/testing/selftests/bpf/progs/test_core_reloc_enumval.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/bpf/progs/test_core_reloc_enumval.c

Extension

.c

Size

1837 bytes

Lines

73

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.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/bpf.h
• stdint.h
• stdbool.h
• bpf/bpf_helpers.h
• bpf/bpf_core_read.h

Detected Declarations

• struct core_reloc_enumval_output
• enum named_enum
• function test_core_enumval

Annotated Snippet

struct core_reloc_enumval_output {
	bool named_val1_exists;
	bool named_val2_exists;
	bool named_val3_exists;
	bool anon_val1_exists;
	bool anon_val2_exists;
	bool anon_val3_exists;

	int named_val1;
	int named_val2;
	int anon_val1;
	int anon_val2;
};

SEC("raw_tracepoint/sys_enter")
int test_core_enumval(void *ctx)
{
#if __has_builtin(__builtin_preserve_enum_value)
	struct core_reloc_enumval_output *out = (void *)&data.out;
	enum named_enum named = 0;
	anon_enum anon = 0;

	out->named_val1_exists = bpf_core_enum_value_exists(named, NAMED_ENUM_VAL1);
	out->named_val2_exists = bpf_core_enum_value_exists(enum named_enum, NAMED_ENUM_VAL2);
	out->named_val3_exists = bpf_core_enum_value_exists(enum named_enum, NAMED_ENUM_VAL3);

	out->anon_val1_exists = bpf_core_enum_value_exists(anon, ANON_ENUM_VAL1);
	out->anon_val2_exists = bpf_core_enum_value_exists(anon_enum, ANON_ENUM_VAL2);
	out->anon_val3_exists = bpf_core_enum_value_exists(anon_enum, ANON_ENUM_VAL3);

	out->named_val1 = bpf_core_enum_value(named, NAMED_ENUM_VAL1);
	out->named_val2 = bpf_core_enum_value(named, NAMED_ENUM_VAL2);
	/* NAMED_ENUM_VAL3 value is optional */

	out->anon_val1 = bpf_core_enum_value(anon, ANON_ENUM_VAL1);
	out->anon_val2 = bpf_core_enum_value(anon, ANON_ENUM_VAL2);
	/* ANON_ENUM_VAL3 value is optional */
#else
	data.skip = true;
#endif

	return 0;
}

Annotation

• Immediate include surface: `linux/bpf.h`, `stdint.h`, `stdbool.h`, `bpf/bpf_helpers.h`, `bpf/bpf_core_read.h`.
• Detected declarations: `struct core_reloc_enumval_output`, `enum named_enum`, `function test_core_enumval`.
• Atlas domain: Support Tooling And Documentation / tools.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.