Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests/bpf: Tests for enum fwd resolved as full enum64
A set of test cases to verify enum fwd resolution logic:
- verify that enum fwd can be resolved as full enum64;
- verify that enum64 fwd can be resolved as full enum;
- verify that enum size is considered when enums are compared for
equivalence.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221101235413.1824260-2-eddyz87@gmail.com
authored by
Eduard Zingerman
and committed by
Andrii Nakryiko
2e20f50f
de048b6e
+83
-5
+83
-5
tools/testing/selftests/bpf/prog_tests/btf.c
+83
-5
tools/testing/selftests/bpf/prog_tests/btf.c
···
7133
7133
BTF_ENUM_ENC(NAME_NTH(4), 456),
7134
7134
/* [4] fwd enum 'e2' after full enum */
7135
7135
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 4),
7136
-
/* [5] incompatible fwd enum with different size */
7136
+
/* [5] fwd enum with different size, size does not matter for fwd */
7137
7137
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 1),
7138
7138
/* [6] incompatible full enum with different value */
7139
7139
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
···
7150
7150
/* [2] full enum 'e2' */
7151
7151
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
7152
7152
BTF_ENUM_ENC(NAME_NTH(4), 456),
7153
-
/* [3] incompatible fwd enum with different size */
7154
-
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 1),
7155
-
/* [4] incompatible full enum with different value */
7153
+
/* [3] incompatible full enum with different value */
7156
7154
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
7157
7155
BTF_ENUM_ENC(NAME_NTH(2), 321),
7158
7156
BTF_END_RAW,
···
7609
7611
BTF_STR_SEC("\0e1\0e1_val"),
7610
7612
},
7611
7613
},
7612
-
7614
+
{
7615
+
.descr = "dedup: enum of different size: no dedup",
7616
+
.input = {
7617
+
.raw_types = {
7618
+
/* [1] enum 'e1' */
7619
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
7620
+
BTF_ENUM_ENC(NAME_NTH(2), 1),
7621
+
/* [2] enum 'e1' */
7622
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 2),
7623
+
BTF_ENUM_ENC(NAME_NTH(2), 1),
7624
+
BTF_END_RAW,
7625
+
},
7626
+
BTF_STR_SEC("\0e1\0e1_val"),
7627
+
},
7628
+
.expect = {
7629
+
.raw_types = {
7630
+
/* [1] enum 'e1' */
7631
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
7632
+
BTF_ENUM_ENC(NAME_NTH(2), 1),
7633
+
/* [2] enum 'e1' */
7634
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 2),
7635
+
BTF_ENUM_ENC(NAME_NTH(2), 1),
7636
+
BTF_END_RAW,
7637
+
},
7638
+
BTF_STR_SEC("\0e1\0e1_val"),
7639
+
},
7640
+
},
7641
+
{
7642
+
.descr = "dedup: enum fwd to enum64",
7643
+
.input = {
7644
+
.raw_types = {
7645
+
/* [1] enum64 'e1' */
7646
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM64, 0, 1), 8),
7647
+
BTF_ENUM64_ENC(NAME_NTH(2), 1, 0),
7648
+
/* [2] enum 'e1' fwd */
7649
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 0), 4),
7650
+
/* [3] typedef enum 'e1' td */
7651
+
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), 2),
7652
+
BTF_END_RAW,
7653
+
},
7654
+
BTF_STR_SEC("\0e1\0e1_val\0td"),
7655
+
},
7656
+
.expect = {
7657
+
.raw_types = {
7658
+
/* [1] enum64 'e1' */
7659
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM64, 0, 1), 8),
7660
+
BTF_ENUM64_ENC(NAME_NTH(2), 1, 0),
7661
+
/* [2] typedef enum 'e1' td */
7662
+
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), 1),
7663
+
BTF_END_RAW,
7664
+
},
7665
+
BTF_STR_SEC("\0e1\0e1_val\0td"),
7666
+
},
7667
+
},
7668
+
{
7669
+
.descr = "dedup: enum64 fwd to enum",
7670
+
.input = {
7671
+
.raw_types = {
7672
+
/* [1] enum 'e1' */
7673
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
7674
+
BTF_ENUM_ENC(NAME_NTH(2), 1),
7675
+
/* [2] enum64 'e1' fwd */
7676
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM64, 0, 0), 8),
7677
+
/* [3] typedef enum 'e1' td */
7678
+
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), 2),
7679
+
BTF_END_RAW,
7680
+
},
7681
+
BTF_STR_SEC("\0e1\0e1_val\0td"),
7682
+
},
7683
+
.expect = {
7684
+
.raw_types = {
7685
+
/* [1] enum 'e1' */
7686
+
BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_ENUM, 0, 1), 4),
7687
+
BTF_ENUM_ENC(NAME_NTH(2), 1),
7688
+
/* [2] typedef enum 'e1' td */
7689
+
BTF_TYPE_ENC(NAME_NTH(3), BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), 1),
7690
+
BTF_END_RAW,
7691
+
},
7692
+
BTF_STR_SEC("\0e1\0e1_val\0td"),
7693
+
},
7694
+
},
7613
7695
};
7614
7696
7615
7697
static int btf_type_size(const struct btf_type *t)