mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-30 12:49:36 +00:00
![Rasmus Villemoes](/assets/img/avatar_default.png)
Before refactoring strspn() and strcspn(), add some simple test cases. Link: https://lkml.kernel.org/r/20220328224119.3003834-1-linux@rasmusvillemoes.dk Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Andy Shevchenko <andy@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
257 lines
4.6 KiB
C
257 lines
4.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
#include <linux/module.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
|
|
static __init int memset16_selftest(void)
|
|
{
|
|
unsigned i, j, k;
|
|
u16 v, *p;
|
|
|
|
p = kmalloc(256 * 2 * 2, GFP_KERNEL);
|
|
if (!p)
|
|
return -1;
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
for (j = 0; j < 256; j++) {
|
|
memset(p, 0xa1, 256 * 2 * sizeof(v));
|
|
memset16(p + i, 0xb1b2, j);
|
|
for (k = 0; k < 512; k++) {
|
|
v = p[k];
|
|
if (k < i) {
|
|
if (v != 0xa1a1)
|
|
goto fail;
|
|
} else if (k < i + j) {
|
|
if (v != 0xb1b2)
|
|
goto fail;
|
|
} else {
|
|
if (v != 0xa1a1)
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fail:
|
|
kfree(p);
|
|
if (i < 256)
|
|
return (i << 24) | (j << 16) | k | 0x8000;
|
|
return 0;
|
|
}
|
|
|
|
static __init int memset32_selftest(void)
|
|
{
|
|
unsigned i, j, k;
|
|
u32 v, *p;
|
|
|
|
p = kmalloc(256 * 2 * 4, GFP_KERNEL);
|
|
if (!p)
|
|
return -1;
|
|
|
|
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) {
|
|
if (v != 0xa1a1a1a1)
|
|
goto fail;
|
|
} else if (k < i + j) {
|
|
if (v != 0xb1b2b3b4)
|
|
goto fail;
|
|
} else {
|
|
if (v != 0xa1a1a1a1)
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fail:
|
|
kfree(p);
|
|
if (i < 256)
|
|
return (i << 24) | (j << 16) | k | 0x8000;
|
|
return 0;
|
|
}
|
|
|
|
static __init int memset64_selftest(void)
|
|
{
|
|
unsigned i, j, k;
|
|
u64 v, *p;
|
|
|
|
p = kmalloc(256 * 2 * 8, GFP_KERNEL);
|
|
if (!p)
|
|
return -1;
|
|
|
|
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) {
|
|
if (v != 0xa1a1a1a1a1a1a1a1ULL)
|
|
goto fail;
|
|
} else if (k < i + j) {
|
|
if (v != 0xb1b2b3b4b5b6b7b8ULL)
|
|
goto fail;
|
|
} else {
|
|
if (v != 0xa1a1a1a1a1a1a1a1ULL)
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fail:
|
|
kfree(p);
|
|
if (i < 256)
|
|
return (i << 24) | (j << 16) | k | 0x8000;
|
|
return 0;
|
|
}
|
|
|
|
static __init int strchr_selftest(void)
|
|
{
|
|
const char *test_string = "abcdefghijkl";
|
|
const char *empty_string = "";
|
|
char *result;
|
|
int i;
|
|
|
|
for (i = 0; i < strlen(test_string) + 1; i++) {
|
|
result = strchr(test_string, test_string[i]);
|
|
if (result - test_string != i)
|
|
return i + 'a';
|
|
}
|
|
|
|
result = strchr(empty_string, '\0');
|
|
if (result != empty_string)
|
|
return 0x101;
|
|
|
|
result = strchr(empty_string, 'a');
|
|
if (result)
|
|
return 0x102;
|
|
|
|
result = strchr(test_string, 'z');
|
|
if (result)
|
|
return 0x103;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __init int strnchr_selftest(void)
|
|
{
|
|
const char *test_string = "abcdefghijkl";
|
|
const char *empty_string = "";
|
|
char *result;
|
|
int i, j;
|
|
|
|
for (i = 0; i < strlen(test_string) + 1; i++) {
|
|
for (j = 0; j < strlen(test_string) + 2; j++) {
|
|
result = strnchr(test_string, j, test_string[i]);
|
|
if (j <= i) {
|
|
if (!result)
|
|
continue;
|
|
return ((i + 'a') << 8) | j;
|
|
}
|
|
if (result - test_string != i)
|
|
return ((i + 'a') << 8) | j;
|
|
}
|
|
}
|
|
|
|
result = strnchr(empty_string, 0, '\0');
|
|
if (result)
|
|
return 0x10001;
|
|
|
|
result = strnchr(empty_string, 1, '\0');
|
|
if (result != empty_string)
|
|
return 0x10002;
|
|
|
|
result = strnchr(empty_string, 1, 'a');
|
|
if (result)
|
|
return 0x10003;
|
|
|
|
result = strnchr(NULL, 0, '\0');
|
|
if (result)
|
|
return 0x10004;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __init int strspn_selftest(void)
|
|
{
|
|
static const struct strspn_test {
|
|
const char str[16];
|
|
const char accept[16];
|
|
const char reject[16];
|
|
unsigned a;
|
|
unsigned r;
|
|
} tests[] __initconst = {
|
|
{ "foobar", "", "", 0, 6 },
|
|
{ "abba", "abc", "ABBA", 4, 4 },
|
|
{ "abba", "a", "b", 1, 1 },
|
|
{ "", "abc", "abc", 0, 0},
|
|
};
|
|
const struct strspn_test *s = tests;
|
|
size_t i, res;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(tests); ++i, ++s) {
|
|
res = strspn(s->str, s->accept);
|
|
if (res != s->a)
|
|
return 0x100 + 2*i;
|
|
res = strcspn(s->str, s->reject);
|
|
if (res != s->r)
|
|
return 0x100 + 2*i + 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static __exit void string_selftest_remove(void)
|
|
{
|
|
}
|
|
|
|
static __init int string_selftest_init(void)
|
|
{
|
|
int test, subtest;
|
|
|
|
test = 1;
|
|
subtest = memset16_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
test = 2;
|
|
subtest = memset32_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
test = 3;
|
|
subtest = memset64_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
test = 4;
|
|
subtest = strchr_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
test = 5;
|
|
subtest = strnchr_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
test = 6;
|
|
subtest = strspn_selftest();
|
|
if (subtest)
|
|
goto fail;
|
|
|
|
pr_info("String selftests succeeded\n");
|
|
return 0;
|
|
fail:
|
|
pr_crit("String selftest failure %d.%08x\n", test, subtest);
|
|
return 0;
|
|
}
|
|
|
|
module_init(string_selftest_init);
|
|
module_exit(string_selftest_remove);
|
|
MODULE_LICENSE("GPL v2");
|