Re: [PATCH v2 bpf-next 03/13] selftests/bpf: test distilled base, split BTF generation

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On Wed, 2024-04-24 at 16:47 +0100, Alan Maguire wrote:

[...]

> +static void test_distilled_base(void)
> +{

[...]

> +	if (!ASSERT_EQ(0, btf__distill_base(btf2, &btf3, &btf4),
> +		       "distilled_base") ||
> +	    !ASSERT_OK_PTR(btf3, "distilled_base") ||
> +	    !ASSERT_OK_PTR(btf4, "distilled_split"))
> +		goto cleanup;

Maybe also assert the value of btf4->start_id?
Otherwise look good.

> +
> +	VALIDATE_RAW_BTF(
> +		btf4,
> +		"[1] INT 'int' size=4 bits_offset=0 nr_bits=32 encoding=SIGNED",
> +		"[2] FWD 's1' fwd_kind=struct",
> +		"[3] STRUCT '(anon)' size=12 vlen=2\n"
> +		"\t'f1' type_id=1 bits_offset=0\n"
> +		"\t'f2' type_id=2 bits_offset=32",
> +		"[4] FWD 'u1' fwd_kind=union",
> +		"[5] UNION '(anon)' size=4 vlen=1\n"
> +		"\t'f1' type_id=1 bits_offset=0",
> +		"[6] ENUM 'e1' encoding=UNSIGNED size=4 vlen=0",
> +		"[7] ENUM '(anon)' encoding=UNSIGNED size=4 vlen=1\n"
> +		"\t'av1' val=2",
> +		"[8] ENUM64 'e641' encoding=SIGNED size=8 vlen=0",
> +		"[9] ENUM64 '(anon)' encoding=SIGNED size=8 vlen=1\n"
> +		"\t'v1' val=1025",
> +		"[10] STRUCT 'embedded' size=4 vlen=0",
> +		"[11] FUNC_PROTO '(anon)' ret_type_id=1 vlen=1\n"
> +		"\t'p1' type_id=1",
> +		"[12] ARRAY '(anon)' type_id=1 index_type_id=1 nr_elems=3",
> +		"[13] PTR '(anon)' type_id=2",
> +		"[14] PTR '(anon)' type_id=3",
> +		"[15] CONST '(anon)' type_id=4",
> +		"[16] RESTRICT '(anon)' type_id=5",
> +		"[17] VOLATILE '(anon)' type_id=6",
> +		"[18] TYPEDEF 'et' type_id=7",
> +		"[19] CONST '(anon)' type_id=8",
> +		"[20] PTR '(anon)' type_id=9",
> +		"[21] STRUCT 'with_embedded' size=4 vlen=1\n"
> +		"\t'f1' type_id=10 bits_offset=0",
> +		"[22] FUNC 'fn' type_id=11 linkage=static",
> +		"[23] TYPEDEF 'arraytype' type_id=12");
> +
> +cleanup:
> +	btf__free(btf4);
> +	btf__free(btf3);
> +	btf__free(btf2);
> +	btf__free(btf1);
> +}

[...]





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