Libbpf userspace function btf__add_union

0.2.0

Append new BTF_KIND_UNION type to BTF object.

Definition

int btf__add_union(struct btf *btf, const char *name, __u32 sz);

Parameters

• btf: pointer to a struct btf object
• name: name of the union, can be NULL or empty for anonymous unions;
• sz: size of the union, in bytes;

Return

>0, type ID of newly added BTF type; <0, on error.

Usage

Union initially has no fields in it. Fields can be added by btf__add_field right after btf__add_union succeeds. All fields should have bit_offset of 0.

Example

Docs could be improved

This part of the docs is incomplete, contributions are very welcome