diff options
| -rw-r--r-- | tools/testing/selftests/bpf/test_btf.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_btf.c b/tools/testing/selftests/bpf/test_btf.c index 1426c0a905c8..38797aa627a7 100644 --- a/tools/testing/selftests/bpf/test_btf.c +++ b/tools/testing/selftests/bpf/test_btf.c @@ -5732,6 +5732,51 @@ const struct btf_dedup_test dedup_tests[] = { }, }, { + .descr = "dedup: struct <-> fwd resolution w/ hash collision", + /* + * // CU 1: + * struct x; + * struct s { + * struct x *x; + * }; + * // CU 2: + * struct x {}; + * struct s { + * struct x *x; + * }; + */ + .input = { + .raw_types = { + /* CU 1 */ + BTF_FWD_ENC(NAME_TBD, 0 /* struct fwd */), /* [1] fwd x */ + BTF_PTR_ENC(1), /* [2] ptr -> [1] */ + BTF_STRUCT_ENC(NAME_TBD, 1, 8), /* [3] struct s */ + BTF_MEMBER_ENC(NAME_TBD, 2, 0), + /* CU 2 */ + BTF_STRUCT_ENC(NAME_TBD, 0, 0), /* [4] struct x */ + BTF_PTR_ENC(4), /* [5] ptr -> [4] */ + BTF_STRUCT_ENC(NAME_TBD, 1, 8), /* [6] struct s */ + BTF_MEMBER_ENC(NAME_TBD, 5, 0), + BTF_END_RAW, + }, + BTF_STR_SEC("\0x\0s\0x\0x\0s\0x\0"), + }, + .expect = { + .raw_types = { + BTF_PTR_ENC(3), /* [1] ptr -> [3] */ + BTF_STRUCT_ENC(NAME_TBD, 1, 8), /* [2] struct s */ + BTF_MEMBER_ENC(NAME_TBD, 1, 0), + BTF_STRUCT_ENC(NAME_NTH(2), 0, 0), /* [3] struct x */ + BTF_END_RAW, + }, + BTF_STR_SEC("\0s\0x"), + }, + .opts = { + .dont_resolve_fwds = false, + .dedup_table_size = 1, /* force hash collisions */ + }, +}, +{ .descr = "dedup: all possible kinds (no duplicates)", .input = { .raw_types = { |