Support zstd-compressed ELF sections. #626
Merged
Commits on Sep 13, 2024
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Support zstd-compressed ELF sections.
zstd has been introduced as an alternative to zlib for the compression of debug sections.[0] Toolchain support is widely present at this time but lack of support in backtrace is a severe limitation on using this feature in Rust programs. This uses a Rust reimplementation of zstd (the ruzstd crate). This has the benefit of simplifying the build process, but this crate is less used and admittedly slower than the zstd crate that binds to the C libzstd. [0] https://maskray.me/blog/2022-09-09-zstd-compressed-debug-sections
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Work around ruzstd only decoding a single frame of the zstd data.
lld chunks the data into 1MB frames for parallel compression so almost everything will have multiple frames.
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