linux-stable/tools/bpf
Delyan Kratunov 08d4dba6ae bpftool: Bpf skeletons assert type sizes
When emitting type declarations in skeletons, bpftool will now also emit
static assertions on the size of the data/bss/rodata/etc fields. This
ensures that in situations where userspace and kernel types have the same
name but differ in size we do not silently produce incorrect results but
instead break the build.

This was reported in [1] and as expected the repro in [2] fails to build
on the new size assert after this change.

  [1]: Closes: https://github.com/libbpf/libbpf/issues/433
  [2]: https://github.com/fuweid/iovisor-bcc-pr-3777

Signed-off-by: Delyan Kratunov <delyank@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Tested-by: Hengqi Chen <hengqi.chen@gmail.com>
Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Link: https://lore.kernel.org/bpf/f562455d7b3cf338e59a7976f4690ec5a0057f7f.camel@fb.com
2022-02-23 17:33:16 -08:00
..
bpftool bpftool: Bpf skeletons assert type sizes 2022-02-23 17:33:16 -08:00
resolve_btfids Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-02-03 17:36:16 -08:00
runqslower tools/bpf: Rename 'struct event' to avoid naming conflict 2022-01-15 12:21:25 +11:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
bpf_asm.c docs: networking: convert filter.txt to ReST 2020-04-28 14:39:46 -07:00
bpf_dbg.c bpf: Simplify the calculation of variables 2021-03-04 19:24:53 -08:00
bpf_exp.l bpf: fix cbpf parser bug for octal numbers 2018-06-03 07:46:55 -07:00
bpf_exp.y tools, bpf_asm: Exit non-zero on errors 2021-02-26 22:53:50 +01:00
bpf_jit_disasm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232 2019-06-19 17:09:06 +02:00
Makefile tools: bpf: Fix error in 'make -C tools/ bpf_install' 2021-07-07 14:06:38 -07:00