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selftests/bpf: Test deduplication for BTF_KIND_DECL_TAG typedef 

Add unit tests for deduplication of BTF_KIND_DECL_TAG to typedef types.
Also changed a few comments from "tag" to "decl_tag" to match
BTF_KIND_DECL_TAG enum value name.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211021195638.4019770-1-yhs@fb.com
This commit is contained in:
Yonghong Song 2021-10-21 12:56:38 -07:00 committed by Alexei Starovoitov
parent 9d19a12b02
commit 557c8c4804
1 changed files with 41 additions and 6 deletions
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47
tools/testing/selftests/bpf/prog_tests/btf.c
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@ -6877,11 +6877,12 @@ const struct btf_dedup_test dedup_tests[] = {
BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 8),
BTF_FUNC_ENC(NAME_TBD, 12), /* [13] func */
BTF_TYPE_FLOAT_ENC(NAME_TBD, 2), /* [14] float */
BTF_DECL_TAG_ENC(NAME_TBD, 13, -1), /* [15] tag */
BTF_DECL_TAG_ENC(NAME_TBD, 13, 1), /* [16] tag */
BTF_DECL_TAG_ENC(NAME_TBD, 13, -1), /* [15] decl_tag */
BTF_DECL_TAG_ENC(NAME_TBD, 13, 1), /* [16] decl_tag */
BTF_DECL_TAG_ENC(NAME_TBD, 7, -1), /* [17] decl_tag */
BTF_END_RAW,
},
BTF_STR_SEC("\0A\0B\0C\0D\0E\0F\0G\0H\0I\0J\0K\0L\0M\0N\0O\0P"),
BTF_STR_SEC("\0A\0B\0C\0D\0E\0F\0G\0H\0I\0J\0K\0L\0M\0N\0O\0P\0Q"),
},
.expect = {
.raw_types = {
@ -6905,11 +6906,12 @@ const struct btf_dedup_test dedup_tests[] = {
BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 8),
BTF_FUNC_ENC(NAME_TBD, 12), /* [13] func */
BTF_TYPE_FLOAT_ENC(NAME_TBD, 2), /* [14] float */
BTF_DECL_TAG_ENC(NAME_TBD, 13, -1), /* [15] tag */
BTF_DECL_TAG_ENC(NAME_TBD, 13, 1), /* [16] tag */
BTF_DECL_TAG_ENC(NAME_TBD, 13, -1), /* [15] decl_tag */
BTF_DECL_TAG_ENC(NAME_TBD, 13, 1), /* [16] decl_tag */
BTF_DECL_TAG_ENC(NAME_TBD, 7, -1), /* [17] decl_tag */
BTF_END_RAW,
},
BTF_STR_SEC("\0A\0B\0C\0D\0E\0F\0G\0H\0I\0J\0K\0L\0M\0N\0O\0P"),
BTF_STR_SEC("\0A\0B\0C\0D\0E\0F\0G\0H\0I\0J\0K\0L\0M\0N\0O\0P\0Q"),
},
.opts = {
.dont_resolve_fwds = false,
@ -7204,6 +7206,39 @@ const struct btf_dedup_test dedup_tests[] = {
.dont_resolve_fwds = false,
},
},
{
.descr = "dedup: typedef tags",
.input = {
.raw_types = {
/* int */
BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_TYPEDEF_ENC(NAME_NTH(1), 1), /* [2] */
BTF_TYPEDEF_ENC(NAME_NTH(1), 1), /* [3] */
/* tag -> t: tag1, tag2 */
BTF_DECL_TAG_ENC(NAME_NTH(2), 2, -1), /* [4] */
BTF_DECL_TAG_ENC(NAME_NTH(3), 2, -1), /* [5] */
/* tag -> t: tag1, tag3 */
BTF_DECL_TAG_ENC(NAME_NTH(2), 3, -1), /* [6] */
BTF_DECL_TAG_ENC(NAME_NTH(4), 3, -1), /* [7] */
BTF_END_RAW,
},
BTF_STR_SEC("\0t\0tag1\0tag2\0tag3"),
},
.expect = {
.raw_types = {
BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */
BTF_TYPEDEF_ENC(NAME_NTH(1), 1), /* [2] */
BTF_DECL_TAG_ENC(NAME_NTH(2), 2, -1), /* [3] */
BTF_DECL_TAG_ENC(NAME_NTH(3), 2, -1), /* [4] */
BTF_DECL_TAG_ENC(NAME_NTH(4), 2, -1), /* [5] */
BTF_END_RAW,
},
BTF_STR_SEC("\0t\0tag1\0tag2\0tag3"),
},
.opts = {
.dont_resolve_fwds = false,
},
},
};