From 49b57e0d01db73c99f86d68480fb9b4014bb1060 Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Fri, 8 Feb 2019 11:19:39 -0800 Subject: [PATCH] tools/bpf: remove btf__get_strings() superseded by raw data API Now that we have btf__get_raw_data() it's trivial for tests to iterate over all strings for testing purposes, which eliminates the need for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 Acked-by: Yonghong Song Signed-off-by: Alexei Starovoitov --- tools/lib/bpf/btf.c | 7 ----- tools/lib/bpf/btf.h | 2 -- tools/lib/bpf/libbpf.map | 1 - tools/testing/selftests/bpf/test_btf.c | 39 +++++++++++++++++--------- 4 files changed, 26 insertions(+), 23 deletions(-) diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index f6b724ed1bdd..6953fedb88ff 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -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) diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index 0306b54d54eb..94bbc249b0f1 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -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, diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index eb78c7c261d9..5fc8222209f8 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -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; diff --git a/tools/testing/selftests/bpf/test_btf.c b/tools/testing/selftests/bpf/test_btf.c index 447acc34db94..bbcacba39590 100644 --- a/tools/testing/selftests/bpf/test_btf.c +++ b/tools/testing/selftests/bpf/test_btf.c @@ -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; -- 2.39.5