lib/tests/string_kunit.c

Source file repositories/reference/linux-study-clean/lib/tests/string_kunit.c

File Facts

System
Linux kernel
Corpus path
lib/tests/string_kunit.c
Extension
.c
Size
29924 bytes
Lines
925
Domain
Kernel Services
Bucket
lib
Inferred role
Kernel Services: implementation source
Status
source implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

Detected Declarations

Annotated Snippet

if (k < i) {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xa1a1,
						"i:%d j:%d k:%d", i, j, k);
				} else if (k < i + j) {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xb1b2,
						"i:%d j:%d k:%d", i, j, k);
				} else {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xa1a1,
						"i:%d j:%d k:%d", i, j, k);
				}
			}
		}
	}
}

static void string_test_memset32(struct kunit *test)
{
	unsigned i, j, k;
	u32 v, *p;

	p = kunit_kzalloc(test, 256 * 2 * 4, GFP_KERNEL);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, p);

	for (i = 0; i < 256; i++) {
		for (j = 0; j < 256; j++) {
			memset(p, 0xa1, 256 * 2 * sizeof(v));
			memset32(p + i, 0xb1b2b3b4, j);
			for (k = 0; k < 512; k++) {
				v = p[k];
				if (k < i) {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xa1a1a1a1,
						"i:%d j:%d k:%d", i, j, k);
				} else if (k < i + j) {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xb1b2b3b4,
						"i:%d j:%d k:%d", i, j, k);
				} else {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xa1a1a1a1,
						"i:%d j:%d k:%d", i, j, k);
				}
			}
		}
	}
}

static void string_test_memset64(struct kunit *test)
{
	unsigned i, j, k;
	u64 v, *p;

	p = kunit_kzalloc(test, 256 * 2 * 8, GFP_KERNEL);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, p);

	for (i = 0; i < 256; i++) {
		for (j = 0; j < 256; j++) {
			memset(p, 0xa1, 256 * 2 * sizeof(v));
			memset64(p + i, 0xb1b2b3b4b5b6b7b8ULL, j);
			for (k = 0; k < 512; k++) {
				v = p[k];
				if (k < i) {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xa1a1a1a1a1a1a1a1ULL,
						"i:%d j:%d k:%d", i, j, k);
				} else if (k < i + j) {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xb1b2b3b4b5b6b7b8ULL,
						"i:%d j:%d k:%d", i, j, k);
				} else {
					KUNIT_ASSERT_EQ_MSG(test, v, 0xa1a1a1a1a1a1a1a1ULL,
						"i:%d j:%d k:%d", i, j, k);
				}
			}
		}
	}
}

static void string_test_strlen(struct kunit *test)
{
	size_t buf_size;
	char *buf, *s;

	buf_size = PAGE_ALIGN(STRING_TEST_MAX_LEN + STRING_TEST_MAX_OFFSET + 1);
	buf = vmalloc(buf_size);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);

	memset(buf, 'A', buf_size);

	for (size_t offset = 0; offset < STRING_TEST_MAX_OFFSET; offset++) {
		for (size_t len = 0; len <= STRING_TEST_MAX_LEN; len++) {
			s = buf + buf_size - 1 - offset - len;
			s[len] = '\0';
			KUNIT_EXPECT_EQ_MSG(test, strlen(s), len,
				"offset:%zu len:%zu", offset, len);

Annotation

Implementation Notes