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selftest/bpf: Relax btf_dedup test checks 

Remove the requirement of a strictly exact string section contents. This used
to be true when string deduplication was done through sorting, but with string
dedup done through hash table, it's no longer true. So relax test harness to
relax strings checks and, consequently, type checks, which now don't have to
have exactly the same string offsets.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201105043402.2530976-3-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2020-11-04 20:33:52 -08:00 committed by Alexei Starovoitov
parent c81ed6d81e
commit d9448f9496
1 changed files with 25 additions and 15 deletions
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40
tools/testing/selftests/bpf/prog_tests/btf.c
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@ -6652,7 +6652,7 @@ static void do_test_dedup(unsigned int test_num)
const void *test_btf_data, *expect_btf_data; const void *test_btf_data, *expect_btf_data;
const char *ret_test_next_str, *ret_expect_next_str; const char *ret_test_next_str, *ret_expect_next_str;
const char *test_strs, *expect_strs; const char *test_strs, *expect_strs;
const char *test_str_cur, *test_str_end; const char *test_str_cur;
const char *expect_str_cur, *expect_str_end; const char *expect_str_cur, *expect_str_end;
unsigned int raw_btf_size; unsigned int raw_btf_size;
void *raw_btf; void *raw_btf;
@ -6719,12 +6719,18 @@ static void do_test_dedup(unsigned int test_num)
goto done; goto done;
} }
test_str_cur = test_strs;
test_str_end = test_strs + test_hdr->str_len;
expect_str_cur = expect_strs; expect_str_cur = expect_strs;
expect_str_end = expect_strs + expect_hdr->str_len; expect_str_end = expect_strs + expect_hdr->str_len;
while (test_str_cur < test_str_end && expect_str_cur < expect_str_end) { while (expect_str_cur < expect_str_end) {
size_t test_len, expect_len; size_t test_len, expect_len;
int off;
off = btf__find_str(test_btf, expect_str_cur);
if (CHECK(off < 0, "exp str '%s' not found: %d\n", expect_str_cur, off)) {
err = -1;
goto done;
}
test_str_cur = btf__str_by_offset(test_btf, off);
test_len = strlen(test_str_cur); test_len = strlen(test_str_cur);
expect_len = strlen(expect_str_cur); expect_len = strlen(expect_str_cur);
@ -6741,15 +6747,8 @@ static void do_test_dedup(unsigned int test_num)
err = -1; err = -1;
goto done; goto done;
} }
test_str_cur += test_len + 1;
expect_str_cur += expect_len + 1; expect_str_cur += expect_len + 1;
} }
if (CHECK(test_str_cur != test_str_end,
"test_str_cur:%p != test_str_end:%p",
test_str_cur, test_str_end)) {
err = -1;
goto done;
}
test_nr_types = btf__get_nr_types(test_btf); test_nr_types = btf__get_nr_types(test_btf);
expect_nr_types = btf__get_nr_types(expect_btf); expect_nr_types = btf__get_nr_types(expect_btf);
@ -6775,10 +6774,21 @@ static void do_test_dedup(unsigned int test_num)
err = -1; err = -1;
goto done; goto done;
} }
if (CHECK(memcmp((void *)test_type, if (CHECK(btf_kind(test_type) != btf_kind(expect_type),
(void *)expect_type, "type %d kind: exp %d != got %u\n",
test_size), i, btf_kind(expect_type), btf_kind(test_type))) {
"type #%d: contents differ", i)) { err = -1;
goto done;
}
if (CHECK(test_type->info != expect_type->info,
"type %d info: exp %d != got %u\n",
i, expect_type->info, test_type->info)) {
err = -1;
goto done;
}
if (CHECK(test_type->size != expect_type->size,
"type %d size/type: exp %d != got %u\n",
i, expect_type->size, test_type->size)) {
err = -1; err = -1;
goto done; goto done;
} }