Pahole: Evolution of a Swiss Army Knife for Linux Kernel Debug Info

Pahole, a powerful tool for exploring and editing debug information, plays a crucial role in Linux kernel development. It currently handles the conversion of compiler-generated debug information into the BTF format usable by the BPF verifier. This article details recent advancements in Pahole, including a new co-maintainer, improved BTF handling, support for flexible arrays and bpf_fastcall, and enhanced Rust support. In the future, Pahole's role in DWARF-to-BTF conversion is expected to diminish as GCC's support for the -gbtf option matures, leading to faster kernel build times.