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tools/bpf: remove btf__get_strings() superseded by raw data API 

Now that we have btf__get_raw_data() it's trivial for tests to iterate
over all strings for testing purposes, which eliminates the need for
btf__get_strings() API.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko 2019-02-08 11:19:39 -08:00 committed by Alexei Starovoitov
parent ae4ab4b411
commit 49b57e0d01
4 changed files with 26 additions and 23 deletions
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7
tools/lib/bpf/btf.c
View File

@ -449,13 +449,6 @@ const void *btf__get_raw_data(const struct btf *btf, __u32 *size)
return btf->data;
}
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)

2
tools/lib/bpf/btf.h
View File

@ -67,8 +67,6 @@ 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 const void *btf__get_raw_data(const struct btf *btf, __u32 *size);
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, const char *map_name,

1
tools/lib/bpf/libbpf.map
View File

@ -137,7 +137,6 @@ LIBBPF_0.0.2 {
btf__get_map_kv_tids;
btf__get_nr_types;
btf__get_raw_data;
btf__get_strings;
btf__load;
btf_ext__free;
btf_ext__func_info_rec_size;

39
tools/testing/selftests/bpf/test_btf.c
View File

@ -5882,15 +5882,17 @@ static void dump_btf_strings(const char *strs, __u32 len)
static int do_test_dedup(unsigned int test_num)
{
const struct btf_dedup_test *test = &dedup_tests[test_num - 1];
int err = 0, i;
__u32 test_nr_types, expect_nr_types, test_str_len, expect_str_len;
void *raw_btf;
unsigned int raw_btf_size;
__u32 test_nr_types, expect_nr_types, test_btf_size, expect_btf_size;
const struct btf_header *test_hdr, *expect_hdr;
struct btf *test_btf = NULL, *expect_btf = NULL;
const void *test_btf_data, *expect_btf_data;
const char *ret_test_next_str, *ret_expect_next_str;
const char *test_strs, *expect_strs;
const char *test_str_cur, *test_str_end;
const char *expect_str_cur, *expect_str_end;
unsigned int raw_btf_size;
void *raw_btf;
int err = 0, i;
fprintf(stderr, "BTF dedup test[%u] (%s):", test_num, test->descr);
@ -5927,23 +5929,34 @@ static int do_test_dedup(unsigned int test_num)
goto done;
}
btf__get_strings(test_btf, &test_strs, &test_str_len);
btf__get_strings(expect_btf, &expect_strs, &expect_str_len);
if (CHECK(test_str_len != expect_str_len,
"test_str_len:%u != expect_str_len:%u",
test_str_len, expect_str_len)) {
test_btf_data = btf__get_raw_data(test_btf, &test_btf_size);
expect_btf_data = btf__get_raw_data(expect_btf, &expect_btf_size);
if (CHECK(test_btf_size != expect_btf_size,
"test_btf_size:%u != expect_btf_size:%u",
test_btf_size, expect_btf_size)) {
err = -1;
goto done;
}
test_hdr = test_btf_data;
test_strs = test_btf_data + test_hdr->str_off;
expect_hdr = expect_btf_data;
expect_strs = expect_btf_data + expect_hdr->str_off;
if (CHECK(test_hdr->str_len != expect_hdr->str_len,
"test_hdr->str_len:%u != expect_hdr->str_len:%u",
test_hdr->str_len, expect_hdr->str_len)) {
fprintf(stderr, "\ntest strings:\n");
dump_btf_strings(test_strs, test_str_len);
dump_btf_strings(test_strs, test_hdr->str_len);
fprintf(stderr, "\nexpected strings:\n");
dump_btf_strings(expect_strs, expect_str_len);
dump_btf_strings(expect_strs, expect_hdr->str_len);
err = -1;
goto done;
}
test_str_cur = test_strs;
test_str_end = test_strs + test_str_len;
test_str_end = test_strs + test_hdr->str_len;
expect_str_cur = expect_strs;
expect_str_end = expect_strs + expect_str_len;
expect_str_end = expect_strs + expect_hdr->str_len;
while (test_str_cur < test_str_end && expect_str_cur < expect_str_end) {
size_t test_len, expect_len;