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selftests/bpf: ensure we always have non-ambiguous sorting in veristat

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Always fall back to unique file/prog comparison if user's custom order
specs are ambiguous. This ensures stable output no matter what.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20221103055304.2904589-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko 2022-11-02 22:52:58 -07:00 committed by Alexei Starovoitov
parent 10b1b3f3e5
commit b9670b904a
1 changed files with 5 additions and 1 deletions
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6
tools/testing/selftests/bpf/veristat.c
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@ -723,7 +723,11 @@ static int cmp_prog_stats(const void *v1, const void *v2)
return cmp;
}
return 0;
/* always disambiguate with file+prog, which are unique */
cmp = strcmp(s1->file_name, s2->file_name);
if (cmp != 0)
return cmp;
return strcmp(s1->prog_name, s2->prog_name);
}
#define HEADER_CHAR '-'