libbpf-cargo: Handle empty unions in BTF types #975
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This was noticed because a "vmlinux.h" contained:
struct bio {
...
union {};
...
};
Which caused the following error when trying to use "struct bio" in a
.bpf.c file:
thread 'main' panicked at /home/jrc/.cargo/registry/src/index.crates.io-6f17d22bba15001f/libbpf-cargo-0.24.6/src/gen/btf.rs:769:49:
index out of bounds: the len is 0 but the index is 0
Fix this by hiding empty unions from the generated types. Rust does not
allow union types with zero fields.
Signed-off-by: Joel Colledge <[email protected]>
danielocfb
approved these changes
Oct 22, 2024
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This was noticed because a "vmlinux.h" contained:
Which caused the following error when trying to use "struct bio" in a .bpf.c file:
Fix this by hiding empty unions from the generated types. Rust does not allow union types with zero fields.
Fixes #974.