mbox series

[bpf-next,0/6] BTF-to-C dumper fixes and improvements

Message ID 20221208185703.2681797-1-andrii@kernel.org (mailing list archive)
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Series BTF-to-C dumper fixes and improvements | expand

Message

Andrii Nakryiko Dec. 8, 2022, 6:56 p.m. UTC 
Fix few tricky issues in libbpf's BTF-to-C converter, discovered thanks to
Per's reports and his randomized testing script.

Most notably there is a much improved and correct padding handling.  But also
it turned out that some corner cases with enums weren't handled correctly
(mode(byte) attribute was a new discovery for me). See respective patches for
more details.

Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Per Sundström XP <per.xp.sundstrom@ericsson.com>

Andrii Nakryiko (6):
  libbpf: fix single-line struct definition output in btf_dump
  libbpf: handle non-standardly sized enums better in BTF-to-C dumper
  selftests/bpf: add non-standardly sized enum tests for btf_dump
  libbpf: fix btf__align_of() by taking into account field offsets
  libbpf: fix BTF-to-C converter's padding logic
  selftests/bpf: add few corner cases to test padding handling of
    btf_dump

 tools/lib/bpf/btf.c                           |  13 ++
 tools/lib/bpf/btf_dump.c                      | 214 ++++++++++++++----
 .../bpf/progs/btf_dump_test_case_bitfields.c  |   2 +-
 .../bpf/progs/btf_dump_test_case_packing.c    |  61 ++++-
 .../bpf/progs/btf_dump_test_case_padding.c    | 146 ++++++++++--
 .../bpf/progs/btf_dump_test_case_syntax.c     |  36 +++
 6 files changed, 404 insertions(+), 68 deletions(-)