perf bpf augmented_raw_syscalls: Add an assert to make sure sizeof(saddr) is a power of two.

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We're using the BPF verifier suggestion:

    22: (85) call bpf_probe_read#4
    R2 min value is negative, either use unsigned or 'var &= const'

That works only when const is a (power of two - 1) so add an assert to
make sure that that is the case.

Suggested-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/ZONrFmJBNlQpSpZj@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

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This commit is contained in:

Arnaldo Carvalho de Melo 2023-08-21 10:40:09 -03:00

parent a50b8db3ea

commit 262b54b6c9

1 changed files with 11 additions and 0 deletions

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tools/perf/util/bpf_skel/augmented_raw_syscalls.bpf.c

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