diff options
Diffstat (limited to 'lib/memcpy_kunit.c')
| -rw-r--r-- | lib/memcpy_kunit.c | 59 |
1 files changed, 55 insertions, 4 deletions
diff --git a/lib/memcpy_kunit.c b/lib/memcpy_kunit.c index 62f8ffcbbaa3..d22fa3838ee9 100644 --- a/lib/memcpy_kunit.c +++ b/lib/memcpy_kunit.c @@ -29,9 +29,8 @@ struct some_bytes { }; #define check(instance, v) do { \ - int i; \ BUILD_BUG_ON(sizeof(instance.data) != 32); \ - for (i = 0; i < sizeof(instance.data); i++) { \ + for (size_t i = 0; i < sizeof(instance.data); i++) { \ KUNIT_ASSERT_EQ_MSG(test, instance.data[i], v, \ "line %d: '%s' not initialized to 0x%02x @ %d (saw 0x%02x)\n", \ __LINE__, #instance, v, i, instance.data[i]); \ @@ -39,9 +38,8 @@ struct some_bytes { } while (0) #define compare(name, one, two) do { \ - int i; \ BUILD_BUG_ON(sizeof(one) != sizeof(two)); \ - for (i = 0; i < sizeof(one); i++) { \ + for (size_t i = 0; i < sizeof(one); i++) { \ KUNIT_EXPECT_EQ_MSG(test, one.data[i], two.data[i], \ "line %d: %s.data[%d] (0x%02x) != %s.data[%d] (0x%02x)\n", \ __LINE__, #one, i, one.data[i], #two, i, two.data[i]); \ @@ -272,10 +270,63 @@ static void memset_test(struct kunit *test) #undef TEST_OP } +static void strtomem_test(struct kunit *test) +{ + static const char input[] = "hi"; + static const char truncate[] = "this is too long"; + struct { + unsigned long canary1; + unsigned char output[sizeof(unsigned long)] __nonstring; + unsigned long canary2; + } wrap; + + memset(&wrap, 0xFF, sizeof(wrap)); + KUNIT_EXPECT_EQ_MSG(test, wrap.canary1, ULONG_MAX, + "bad initial canary value"); + KUNIT_EXPECT_EQ_MSG(test, wrap.canary2, ULONG_MAX, + "bad initial canary value"); + + /* Check unpadded copy leaves surroundings untouched. */ + strtomem(wrap.output, input); + KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX); + KUNIT_EXPECT_EQ(test, wrap.output[0], input[0]); + KUNIT_EXPECT_EQ(test, wrap.output[1], input[1]); + for (size_t i = 2; i < sizeof(wrap.output); i++) + KUNIT_EXPECT_EQ(test, wrap.output[i], 0xFF); + KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX); + + /* Check truncated copy leaves surroundings untouched. */ + memset(&wrap, 0xFF, sizeof(wrap)); + strtomem(wrap.output, truncate); + KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX); + for (size_t i = 0; i < sizeof(wrap.output); i++) + KUNIT_EXPECT_EQ(test, wrap.output[i], truncate[i]); + KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX); + + /* Check padded copy leaves only string padded. */ + memset(&wrap, 0xFF, sizeof(wrap)); + strtomem_pad(wrap.output, input, 0xAA); + KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX); + KUNIT_EXPECT_EQ(test, wrap.output[0], input[0]); + KUNIT_EXPECT_EQ(test, wrap.output[1], input[1]); + for (size_t i = 2; i < sizeof(wrap.output); i++) + KUNIT_EXPECT_EQ(test, wrap.output[i], 0xAA); + KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX); + + /* Check truncated padded copy has no padding. */ + memset(&wrap, 0xFF, sizeof(wrap)); + strtomem(wrap.output, truncate); + KUNIT_EXPECT_EQ(test, wrap.canary1, ULONG_MAX); + for (size_t i = 0; i < sizeof(wrap.output); i++) + KUNIT_EXPECT_EQ(test, wrap.output[i], truncate[i]); + KUNIT_EXPECT_EQ(test, wrap.canary2, ULONG_MAX); +} + static struct kunit_case memcpy_test_cases[] = { KUNIT_CASE(memset_test), KUNIT_CASE(memcpy_test), KUNIT_CASE(memmove_test), + KUNIT_CASE(strtomem_test), {} }; |