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Commit 49b57e0d authored by Andrii Nakryiko's avatar Andrii Nakryiko Committed by Alexei Starovoitov
Browse files

tools/bpf: remove btf__get_strings() superseded by raw data API 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: default avatarAndrii Nakryiko <andriin@fb.com>
Acked-by: default avatarYonghong Song <yhs@fb.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent ae4ab4b4

tools/lib/bpf/btf.c

+0 −7
Original line number Diff line number Diff line
@@ -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)

tools/lib/bpf/btf.h

+0 −2
Original line number Diff line number Diff line
@@ -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,

tools/lib/bpf/libbpf.map

+0 −1
Original line number Diff line number Diff line
@@ -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;

tools/testing/selftests/bpf/test_btf.c

+26 −13
Original line number Diff line number Diff line
@@ -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;