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authorAndrii Nakryiko <andriin@fb.com>2019-02-05 04:29:46 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2019-02-05 18:52:57 +0300
commit9c651127445c2fb3dca7b000bce6de97290288ff (patch)
treefe630450860cda33ac53bae54ad2bcb3247b6c9a /tools/lib
parentd5caef5b56555bfa2ac0cf730f075864a023437e (diff)
downloadlinux-9c651127445c2fb3dca7b000bce6de97290288ff.tar.xz
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 <andriin@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/btf.c12
-rw-r--r--tools/lib/bpf/btf.h3
-rw-r--r--tools/lib/bpf/libbpf.map2
3 files changed, 17 insertions, 0 deletions
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;