kernel/tools/testing/selftests/bpf/btf_helpers.c, branch linux-6.2.y

selftests/bpf: Test new enum kflag and enum64 API functions

2022-06-07T17:20:43Z

Add tests to use the new enum kflag and enum64 API functions in selftest btf_write. Acked-by: Andrii Nakryiko Signed-off-by: Yonghong Song Link: https://lore.kernel.org/r/20220607062703.3724287-1-yhs@fb.com Signed-off-by: Alexei Starovoitov

selftests/bpf: Test libbpf API function btf__add_type_tag()

2021-11-12T01:41:11Z

Add unit tests for btf__add_type_tag(). Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211112012625.1505748-1-yhs@fb.com

selftests/bpf: Update btf_dump__new() uses to v1.0+ variant

2021-11-12T00:54:06Z

Update to-be-deprecated forms of btf_dump__new(). Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20211111053624.190580-8-andrii@kernel.org

selftests/bpf: Fix memory leaks in btf_type_c_dump() helper

2021-11-07T17:14:15Z

Free up memory and resources used by temporary allocated memstream and btf_dump instance. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Reviewed-by: Hengqi Chen Link: https://lore.kernel.org/bpf/20211107165521.9240-4-andrii@kernel.org

selftests/bpf: Switch to new btf__type_cnt/btf__raw_data APIs

2021-10-22T23:09:14Z

Replace the calls to btf__get_nr_types/btf__get_raw_data in selftests with new APIs btf__type_cnt/btf__raw_data. The old APIs will be deprecated in libbpf v0.7+. Signed-off-by: Hengqi Chen Signed-off-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20211022130623.1548429-6-hengqi.chen@gmail.com

bpf: Rename BTF_KIND_TAG to BTF_KIND_DECL_TAG

2021-10-19T01:35:36Z

Patch set [1] introduced BTF_KIND_TAG to allow tagging declarations for struct/union, struct/union field, var, func and func arguments and these tags will be encoded into dwarf. They are also encoded to btf by llvm for the bpf target. After BTF_KIND_TAG is introduced, we intended to use it for kernel __user attributes. But kernel __user is actually a type attribute. Upstream and internal discussion showed it is not a good idea to mix declaration attribute and type attribute. So we proposed to introduce btf_type_tag as a type attribute and existing btf_tag renamed to btf_decl_tag ([2]). This patch renamed BTF_KIND_TAG to BTF_KIND_DECL_TAG and some other declarations with *_tag to *_decl_tag to make it clear the tag is for declaration. In the future, BTF_KIND_TYPE_TAG might be introduced per [3]. [1] https://lore.kernel.org/bpf/20210914223004.244411-1-yhs@fb.com/ [2] https://reviews.llvm.org/D111588 [3] https://reviews.llvm.org/D111199 Fixes: b5ea834dde6b ("bpf: Support for new btf kind BTF_KIND_TAG") Fixes: 5b84bd10363e ("libbpf: Add support for BTF_KIND_TAG") Fixes: 5c07f2fec003 ("bpftool: Add support for BTF_KIND_TAG") Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20211012164838.3345699-1-yhs@fb.com

selftests/bpf: Test libbpf API function btf__add_tag()

2021-09-15T01:45:52Z

Add btf_write tests with btf__add_tag() function. Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210914223036.247560-1-yhs@fb.com

selftest/bpf: Add BTF_KIND_FLOAT tests

2021-03-05T01:58:16Z

Test the good variants as well as the potential malformed ones. Signed-off-by: Ilya Leoshkevich Signed-off-by: Alexei Starovoitov Acked-by: Yonghong Song Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20210226202256.116518-8-iii@linux.ibm.com

selftests/bpf: Add split BTF dedup selftests

2020-11-06T02:37:31Z

Add selftests validating BTF deduplication for split BTF case. Add a helper macro that allows to validate entire BTF with raw BTF dump, not just type-by-type. This saves tons of code and complexity. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20201105043402.2530976-11-andrii@kernel.org

selftests/bpf: Add checking of raw type dump in BTF writer APIs selftests

2020-11-06T02:37:30Z

Add re-usable btf_helpers.{c,h} to provide BTF-related testing routines. Start with adding a raw BTF dumping helpers. Raw BTF dump is the most succinct and at the same time a very human-friendly way to validate exact contents of BTF types. Cross-validate raw BTF dump and writable BTF in a single selftest. Raw type dump checks also serve as a good self-documentation. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov Acked-by: Song Liu Link: https://lore.kernel.org/bpf/20201105043402.2530976-7-andrii@kernel.org