From 9c651127445c2fb3dca7b000bce6de97290288ff Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Mon, 4 Feb 2019 17:29:46 -0800 Subject: selftests/btf: add initial BTF dedup tests This patch sets up a new kind of tests (BTF dedup tests) and tests few aspects of BTF dedup algorithm. More complete set of tests will come in follow up patches. Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann --- tools/lib/bpf/btf.c | 12 ++++++++++++ tools/lib/bpf/btf.h | 3 +++ tools/lib/bpf/libbpf.map | 2 ++ 3 files changed, 17 insertions(+) (limited to 'tools/lib') diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index e5097be16018..4949f8840bda 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -237,6 +237,11 @@ static int btf_parse_type_sec(struct btf *btf) return 0; } +__u32 btf__get_nr_types(const struct btf *btf) +{ + return btf->nr_types; +} + const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 type_id) { if (type_id > btf->nr_types) @@ -427,6 +432,13 @@ int btf__fd(const struct btf *btf) return btf->fd; } +void btf__get_strings(const struct btf *btf, const char **strings, + __u32 *str_len) +{ + *strings = btf->strings; + *str_len = btf->hdr->str_len; +} + const char *btf__name_by_offset(const struct btf *btf, __u32 offset) { if (offset < btf->hdr->str_len) diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index c739de7ed993..25a9d2db035d 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -59,11 +59,14 @@ LIBBPF_API void btf__free(struct btf *btf); LIBBPF_API struct btf *btf__new(__u8 *data, __u32 size); LIBBPF_API __s32 btf__find_by_name(const struct btf *btf, const char *type_name); +LIBBPF_API __u32 btf__get_nr_types(const struct btf *btf); LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 id); LIBBPF_API __s64 btf__resolve_size(const struct btf *btf, __u32 type_id); LIBBPF_API int btf__resolve_type(const struct btf *btf, __u32 type_id); LIBBPF_API int btf__fd(const struct btf *btf); +LIBBPF_API void btf__get_strings(const struct btf *btf, const char **strings, + __u32 *str_len); LIBBPF_API const char *btf__name_by_offset(const struct btf *btf, __u32 offset); LIBBPF_API int btf__get_from_id(__u32 id, struct btf **btf); LIBBPF_API int btf__get_map_kv_tids(const struct btf *btf, char *map_name, diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 7e4a8c1e1c1c..89c1149e32ee 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -135,6 +135,8 @@ LIBBPF_0.0.2 { bpf_get_link_xdp_id; btf__dedup; btf__get_map_kv_tids; + btf__get_nr_types; + btf__get_strings; btf_ext__free; btf_ext__func_info_rec_size; btf_ext__line_info_rec_size; -- cgit