selftests/bpf: Add BTF_KIND_ENUM64 unit tests

Add unit tests for basic BTF_KIND_ENUM64 encoding.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220607062708.3724845-1-yhs@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c
index 8e068e0..a986ee5 100644 (file)
--- a/tools/testing/selftests/bpf/prog_tests/btf.c
+++ b/tools/testing/selftests/bpf/prog_tests/btf.c
@@ -4052,6 +4052,42 @@ static struct btf_raw_test raw_tests[] = {
        .btf_load_err = true,
        .err_str = "Type tags don't precede modifiers",
 },
+{
+       .descr = "enum64 test #1, unsigned, size 8",
+       .raw_types = {
+               BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
+               BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_ENUM64, 0, 2), 8), /* [2] */
+               BTF_ENUM64_ENC(NAME_TBD, 0, 0),
+               BTF_ENUM64_ENC(NAME_TBD, 1, 1),
+               BTF_END_RAW,
+       },
+       BTF_STR_SEC("\0a\0b\0c"),
+       .map_type = BPF_MAP_TYPE_ARRAY,
+       .map_name = "tag_type_check_btf",
+       .key_size = sizeof(int),
+       .value_size = 8,
+       .key_type_id = 1,
+       .value_type_id = 2,
+       .max_entries = 1,
+},
+{
+       .descr = "enum64 test #2, signed, size 4",
+       .raw_types = {
+               BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4),                  /* [1] */
+               BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_ENUM64, 1, 2), 4), /* [2] */
+               BTF_ENUM64_ENC(NAME_TBD, -1, 0),
+               BTF_ENUM64_ENC(NAME_TBD, 1, 0),
+               BTF_END_RAW,
+       },
+       BTF_STR_SEC("\0a\0b\0c"),
+       .map_type = BPF_MAP_TYPE_ARRAY,
+       .map_name = "tag_type_check_btf",
+       .key_size = sizeof(int),
+       .value_size = 4,
+       .key_type_id = 1,
+       .value_type_id = 2,
+       .max_entries = 1,
+},
 
 }; /* struct btf_raw_test raw_tests[] */
 

diff --git a/tools/testing/selftests/bpf/test_btf.h b/tools/testing/selftests/bpf/test_btf.h
index 128989b..38782bd 100644 (file)
--- a/tools/testing/selftests/bpf/test_btf.h
+++ b/tools/testing/selftests/bpf/test_btf.h
@@ -39,6 +39,7 @@
 #define BTF_MEMBER_ENC(name, type, bits_offset)        \
        (name), (type), (bits_offset)
 #define BTF_ENUM_ENC(name, val) (name), (val)
+#define BTF_ENUM64_ENC(name, val_lo32, val_hi32) (name), (val_lo32), (val_hi32)
 #define BTF_MEMBER_OFFSET(bitfield_size, bits_offset) \
        ((bitfield_size) << 24 | (bits_offset))