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selftests/bpf: add fwd enum resolution test for btf_dedup 

This patch adds test verifying new btf_dedup logic of resolving
forward-declared enums.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko 2019-03-10 17:44:10 -07:00 committed by Alexei Starovoitov
parent 9768095ba9
commit 8fd7a61aa5
1 changed files with 44 additions and 0 deletions
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44
tools/testing/selftests/bpf/test_btf.c
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@ -5874,6 +5874,50 @@ const struct btf_dedup_test dedup_tests[] = {
.dont_resolve_fwds = false,
},
},
{
.descr = "dedup: enum fwd resolution",
.input = {
.raw_types = {
/* [1] fwd enum 'e1' before full enum */
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 4),
/* [2] full enum 'e1' after fwd */
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
BTF_ENUM_ENC(NAME_NTH(2), 123),
/* [3] full enum 'e2' before fwd */
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
BTF_ENUM_ENC(NAME_NTH(4), 456),
/* [4] fwd enum 'e2' after full enum */
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 4),
/* [5] incompatible fwd enum with different size */
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 1),
/* [6] incompatible full enum with different value */
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
BTF_ENUM_ENC(NAME_NTH(2), 321),
BTF_END_RAW,
},
BTF_STR_SEC("\0e1\0e1_val\0e2\0e2_val"),
},
.expect = {
.raw_types = {
/* [1] full enum 'e1' */
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
BTF_ENUM_ENC(NAME_NTH(2), 123),
/* [2] full enum 'e2' */
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
BTF_ENUM_ENC(NAME_NTH(4), 456),
/* [3] incompatible fwd enum with different size */
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 1),
/* [4] incompatible full enum with different value */
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
BTF_ENUM_ENC(NAME_NTH(2), 321),
BTF_END_RAW,
},
BTF_STR_SEC("\0e1\0e1_val\0e2\0e2_val"),
},
.opts = {
.dont_resolve_fwds = false,
},
},
};