emit btf debug info for loading with libbpf-rs

[dvc94ch]

No description provided.

[vlad9486]

Remove this line, and use the linker with debug build.

But there is another problem: libbpf expect the structure has field type, but it is keyword in rust, and escaping does not help, debug info anyway containing r#type instead of type.

The simple solution is bithack of the bpf elf sed -i 's/r#type/type\x0\x0/g' path/to/bpf.elf.

[vlad9486]

Hello, @alessandrod thanks for the linker, it is great. I think create a pr to remove few lines is overkill. Please, consider to remove this line, or add a command line option.

[alessandrod]

I'll put the strip behind a command line flag, but I'm curious has anyone been getting segfaults generating BTF debug info? I know there's something that triggers a segfault in the BTF emitter in llvm, but haven't had time to look into it.

[vlad9486]

I have a bpf binary containing ring buffer, map, dozen of tracepoints and some non-trivial logic, I never saw a segfault during developing. But I saw some segfault when use release mode bpf binary, maybe it is how to reproduce the issue. Anyway it makes no sense to use release mode bpf with libbpf.

[vadorovsky]

Done in #182