UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

selftests/bpf: Test libbpf API function btf__add_tag() 

Add btf_write tests with btf__add_tag() function.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210914223036.247560-1-yhs@fb.com
This commit is contained in:
Yonghong Song 2021-09-14 15:30:36 -07:00 committed by Alexei Starovoitov
parent 5c07f2fec0
commit 71d29c2d47
2 changed files with 27 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
tools/testing/selftests/bpf/btf_helpers.c
View File

@ -24,11 +24,12 @@ static const char * const btf_kind_str_mapping[] = {
[BTF_KIND_VAR] = "VAR",
[BTF_KIND_DATASEC] = "DATASEC",
[BTF_KIND_FLOAT] = "FLOAT",
[BTF_KIND_TAG] = "TAG",
};
static const char *btf_kind_str(__u16 kind)
{
if (kind > BTF_KIND_DATASEC)
if (kind > BTF_KIND_TAG)
return "UNKNOWN";
return btf_kind_str_mapping[kind];
}
@ -177,6 +178,10 @@ int fprintf_btf_type_raw(FILE *out, const struct btf *btf, __u32 id)
case BTF_KIND_FLOAT:
fprintf(out, " size=%u", t->size);
break;
case BTF_KIND_TAG:
fprintf(out, " type_id=%u component_idx=%d",
t->type, btf_tag(t)->component_idx);
break;
default:
break;
}

21
tools/testing/selftests/bpf/prog_tests/btf_write.c
View File

@ -281,5 +281,26 @@ void test_btf_write() {
"[17] DATASEC 'datasec1' size=12 vlen=1\n"
"\ttype_id=1 offset=4 size=8", "raw_dump");
/* TAG */
id = btf__add_tag(btf, "tag1", 16, -1);
ASSERT_EQ(id, 18, "tag_id");
t = btf__type_by_id(btf, 18);
ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag1", "tag_value");
ASSERT_EQ(btf_kind(t), BTF_KIND_TAG, "tag_kind");
ASSERT_EQ(t->type, 16, "tag_type");
ASSERT_EQ(btf_tag(t)->component_idx, -1, "tag_component_idx");
ASSERT_STREQ(btf_type_raw_dump(btf, 18),
"[18] TAG 'tag1' type_id=16 component_idx=-1", "raw_dump");
id = btf__add_tag(btf, "tag2", 14, 1);
ASSERT_EQ(id, 19, "tag_id");
t = btf__type_by_id(btf, 19);
ASSERT_STREQ(btf__str_by_offset(btf, t->name_off), "tag2", "tag_value");
ASSERT_EQ(btf_kind(t), BTF_KIND_TAG, "tag_kind");
ASSERT_EQ(t->type, 14, "tag_type");
ASSERT_EQ(btf_tag(t)->component_idx, 1, "tag_component_idx");
ASSERT_STREQ(btf_type_raw_dump(btf, 19),
"[19] TAG 'tag2' type_id=14 component_idx=1", "raw_dump");
btf__free(btf);
}