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219 lines
3.8 KiB
219 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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#include <linux/module.h> |
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#include <linux/printk.h> |
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#include <linux/slab.h> |
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#include <linux/string.h> |
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static __init int memset16_selftest(void) |
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{ |
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unsigned i, j, k; |
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u16 v, *p; |
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p = kmalloc(256 * 2 * 2, GFP_KERNEL); |
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if (!p) |
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return -1; |
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for (i = 0; i < 256; i++) { |
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for (j = 0; j < 256; j++) { |
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memset(p, 0xa1, 256 * 2 * sizeof(v)); |
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memset16(p + i, 0xb1b2, j); |
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for (k = 0; k < 512; k++) { |
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v = p[k]; |
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if (k < i) { |
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if (v != 0xa1a1) |
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goto fail; |
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} else if (k < i + j) { |
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if (v != 0xb1b2) |
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goto fail; |
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} else { |
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if (v != 0xa1a1) |
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goto fail; |
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} |
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} |
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} |
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} |
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fail: |
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kfree(p); |
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if (i < 256) |
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return (i << 24) | (j << 16) | k | 0x8000; |
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return 0; |
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} |
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static __init int memset32_selftest(void) |
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{ |
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unsigned i, j, k; |
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u32 v, *p; |
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p = kmalloc(256 * 2 * 4, GFP_KERNEL); |
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if (!p) |
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return -1; |
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for (i = 0; i < 256; i++) { |
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for (j = 0; j < 256; j++) { |
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memset(p, 0xa1, 256 * 2 * sizeof(v)); |
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memset32(p + i, 0xb1b2b3b4, j); |
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for (k = 0; k < 512; k++) { |
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v = p[k]; |
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if (k < i) { |
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if (v != 0xa1a1a1a1) |
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goto fail; |
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} else if (k < i + j) { |
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if (v != 0xb1b2b3b4) |
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goto fail; |
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} else { |
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if (v != 0xa1a1a1a1) |
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goto fail; |
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} |
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} |
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} |
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} |
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fail: |
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kfree(p); |
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if (i < 256) |
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return (i << 24) | (j << 16) | k | 0x8000; |
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return 0; |
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} |
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static __init int memset64_selftest(void) |
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{ |
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unsigned i, j, k; |
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u64 v, *p; |
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p = kmalloc(256 * 2 * 8, GFP_KERNEL); |
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if (!p) |
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return -1; |
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for (i = 0; i < 256; i++) { |
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for (j = 0; j < 256; j++) { |
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memset(p, 0xa1, 256 * 2 * sizeof(v)); |
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memset64(p + i, 0xb1b2b3b4b5b6b7b8ULL, j); |
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for (k = 0; k < 512; k++) { |
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v = p[k]; |
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if (k < i) { |
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if (v != 0xa1a1a1a1a1a1a1a1ULL) |
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goto fail; |
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} else if (k < i + j) { |
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if (v != 0xb1b2b3b4b5b6b7b8ULL) |
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goto fail; |
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} else { |
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if (v != 0xa1a1a1a1a1a1a1a1ULL) |
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goto fail; |
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} |
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} |
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} |
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} |
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fail: |
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kfree(p); |
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if (i < 256) |
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return (i << 24) | (j << 16) | k | 0x8000; |
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return 0; |
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} |
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static __init int strchr_selftest(void) |
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{ |
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const char *test_string = "abcdefghijkl"; |
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const char *empty_string = ""; |
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char *result; |
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int i; |
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for (i = 0; i < strlen(test_string) + 1; i++) { |
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result = strchr(test_string, test_string[i]); |
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if (result - test_string != i) |
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return i + 'a'; |
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} |
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result = strchr(empty_string, '\0'); |
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if (result != empty_string) |
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return 0x101; |
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result = strchr(empty_string, 'a'); |
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if (result) |
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return 0x102; |
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result = strchr(test_string, 'z'); |
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if (result) |
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return 0x103; |
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return 0; |
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} |
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static __init int strnchr_selftest(void) |
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{ |
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const char *test_string = "abcdefghijkl"; |
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const char *empty_string = ""; |
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char *result; |
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int i, j; |
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for (i = 0; i < strlen(test_string) + 1; i++) { |
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for (j = 0; j < strlen(test_string) + 2; j++) { |
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result = strnchr(test_string, j, test_string[i]); |
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if (j <= i) { |
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if (!result) |
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continue; |
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return ((i + 'a') << 8) | j; |
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} |
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if (result - test_string != i) |
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return ((i + 'a') << 8) | j; |
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} |
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} |
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result = strnchr(empty_string, 0, '\0'); |
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if (result) |
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return 0x10001; |
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result = strnchr(empty_string, 1, '\0'); |
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if (result != empty_string) |
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return 0x10002; |
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result = strnchr(empty_string, 1, 'a'); |
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if (result) |
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return 0x10003; |
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result = strnchr(NULL, 0, '\0'); |
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if (result) |
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return 0x10004; |
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return 0; |
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} |
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static __init int string_selftest_init(void) |
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{ |
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int test, subtest; |
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test = 1; |
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subtest = memset16_selftest(); |
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if (subtest) |
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goto fail; |
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test = 2; |
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subtest = memset32_selftest(); |
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if (subtest) |
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goto fail; |
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test = 3; |
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subtest = memset64_selftest(); |
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if (subtest) |
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goto fail; |
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test = 4; |
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subtest = strchr_selftest(); |
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if (subtest) |
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goto fail; |
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test = 5; |
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subtest = strnchr_selftest(); |
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if (subtest) |
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goto fail; |
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pr_info("String selftests succeeded\n"); |
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return 0; |
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fail: |
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pr_crit("String selftest failure %d.%08x\n", test, subtest); |
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return 0; |
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} |
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module_init(string_selftest_init); |
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MODULE_LICENSE("GPL v2");
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