btf_find_decl_tag_value
const char *btf_find_decl_tag_value(const struct btf *btf, const struct btf_type *pt,
value_type = btf_find_decl_tag_value(btf, pt, comp_idx, "contains:");
name = btf_find_decl_tag_value(btf, t, -1, "exception_callback:");