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289 lines
8.0 KiB
289 lines
8.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Test cases for memcpy(), memmove(), and memset(). |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <kunit/test.h> |
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#include <linux/device.h> |
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#include <linux/init.h> |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/module.h> |
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#include <linux/overflow.h> |
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#include <linux/slab.h> |
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#include <linux/types.h> |
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#include <linux/vmalloc.h> |
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struct some_bytes { |
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union { |
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u8 data[32]; |
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struct { |
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u32 one; |
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u16 two; |
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u8 three; |
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/* 1 byte hole */ |
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u32 four[4]; |
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}; |
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}; |
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}; |
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#define check(instance, v) do { \ |
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int i; \ |
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BUILD_BUG_ON(sizeof(instance.data) != 32); \ |
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for (i = 0; i < sizeof(instance.data); i++) { \ |
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KUNIT_ASSERT_EQ_MSG(test, instance.data[i], v, \ |
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"line %d: '%s' not initialized to 0x%02x @ %d (saw 0x%02x)\n", \ |
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__LINE__, #instance, v, i, instance.data[i]); \ |
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} \ |
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} while (0) |
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#define compare(name, one, two) do { \ |
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int i; \ |
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BUILD_BUG_ON(sizeof(one) != sizeof(two)); \ |
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for (i = 0; i < sizeof(one); i++) { \ |
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KUNIT_EXPECT_EQ_MSG(test, one.data[i], two.data[i], \ |
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"line %d: %s.data[%d] (0x%02x) != %s.data[%d] (0x%02x)\n", \ |
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__LINE__, #one, i, one.data[i], #two, i, two.data[i]); \ |
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} \ |
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kunit_info(test, "ok: " TEST_OP "() " name "\n"); \ |
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} while (0) |
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static void memcpy_test(struct kunit *test) |
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{ |
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#define TEST_OP "memcpy" |
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struct some_bytes control = { |
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.data = { 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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}, |
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}; |
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struct some_bytes zero = { }; |
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struct some_bytes middle = { |
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.data = { 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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}, |
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}; |
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struct some_bytes three = { |
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.data = { 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, |
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}, |
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}; |
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struct some_bytes dest = { }; |
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int count; |
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u8 *ptr; |
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/* Verify static initializers. */ |
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check(control, 0x20); |
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check(zero, 0); |
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compare("static initializers", dest, zero); |
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/* Verify assignment. */ |
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dest = control; |
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compare("direct assignment", dest, control); |
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/* Verify complete overwrite. */ |
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memcpy(dest.data, zero.data, sizeof(dest.data)); |
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compare("complete overwrite", dest, zero); |
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/* Verify middle overwrite. */ |
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dest = control; |
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memcpy(dest.data + 12, zero.data, 7); |
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compare("middle overwrite", dest, middle); |
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/* Verify argument side-effects aren't repeated. */ |
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dest = control; |
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ptr = dest.data; |
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count = 1; |
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memcpy(ptr++, zero.data, count++); |
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ptr += 8; |
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memcpy(ptr++, zero.data, count++); |
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compare("argument side-effects", dest, three); |
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#undef TEST_OP |
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} |
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static void memmove_test(struct kunit *test) |
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{ |
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#define TEST_OP "memmove" |
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struct some_bytes control = { |
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.data = { 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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}, |
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}; |
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struct some_bytes zero = { }; |
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struct some_bytes middle = { |
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.data = { 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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}, |
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}; |
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struct some_bytes five = { |
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.data = { 0x00, 0x00, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x00, 0x00, 0x00, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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}, |
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}; |
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struct some_bytes overlap = { |
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.data = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
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0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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}, |
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}; |
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struct some_bytes overlap_expected = { |
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.data = { 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x04, 0x07, |
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0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, 0x99, |
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}, |
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}; |
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struct some_bytes dest = { }; |
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int count; |
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u8 *ptr; |
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/* Verify static initializers. */ |
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check(control, 0x99); |
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check(zero, 0); |
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compare("static initializers", zero, dest); |
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/* Verify assignment. */ |
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dest = control; |
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compare("direct assignment", dest, control); |
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/* Verify complete overwrite. */ |
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memmove(dest.data, zero.data, sizeof(dest.data)); |
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compare("complete overwrite", dest, zero); |
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/* Verify middle overwrite. */ |
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dest = control; |
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memmove(dest.data + 12, zero.data, 7); |
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compare("middle overwrite", dest, middle); |
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/* Verify argument side-effects aren't repeated. */ |
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dest = control; |
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ptr = dest.data; |
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count = 2; |
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memmove(ptr++, zero.data, count++); |
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ptr += 9; |
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memmove(ptr++, zero.data, count++); |
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compare("argument side-effects", dest, five); |
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/* Verify overlapping overwrite is correct. */ |
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ptr = &overlap.data[2]; |
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memmove(ptr, overlap.data, 5); |
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compare("overlapping write", overlap, overlap_expected); |
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#undef TEST_OP |
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} |
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static void memset_test(struct kunit *test) |
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{ |
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#define TEST_OP "memset" |
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struct some_bytes control = { |
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.data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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}, |
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}; |
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struct some_bytes complete = { |
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.data = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
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}, |
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}; |
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struct some_bytes middle = { |
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.data = { 0x30, 0x30, 0x30, 0x30, 0x31, 0x31, 0x31, 0x31, |
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0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, |
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0x31, 0x31, 0x31, 0x31, 0x30, 0x30, 0x30, 0x30, |
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0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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}, |
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}; |
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struct some_bytes three = { |
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.data = { 0x60, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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0x30, 0x61, 0x61, 0x30, 0x30, 0x30, 0x30, 0x30, |
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0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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}, |
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}; |
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struct some_bytes after = { |
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.data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x72, |
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0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, |
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0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, |
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0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, |
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}, |
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}; |
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struct some_bytes startat = { |
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.data = { 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, |
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0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, |
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0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, |
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0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, 0x79, |
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}, |
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}; |
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struct some_bytes dest = { }; |
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int count, value; |
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u8 *ptr; |
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/* Verify static initializers. */ |
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check(control, 0x30); |
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check(dest, 0); |
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/* Verify assignment. */ |
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dest = control; |
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compare("direct assignment", dest, control); |
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/* Verify complete overwrite. */ |
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memset(dest.data, 0xff, sizeof(dest.data)); |
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compare("complete overwrite", dest, complete); |
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/* Verify middle overwrite. */ |
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dest = control; |
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memset(dest.data + 4, 0x31, 16); |
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compare("middle overwrite", dest, middle); |
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/* Verify argument side-effects aren't repeated. */ |
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dest = control; |
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ptr = dest.data; |
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value = 0x60; |
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count = 1; |
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memset(ptr++, value++, count++); |
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ptr += 8; |
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memset(ptr++, value++, count++); |
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compare("argument side-effects", dest, three); |
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/* Verify memset_after() */ |
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dest = control; |
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memset_after(&dest, 0x72, three); |
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compare("memset_after()", dest, after); |
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/* Verify memset_startat() */ |
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dest = control; |
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memset_startat(&dest, 0x79, four); |
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compare("memset_startat()", dest, startat); |
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#undef TEST_OP |
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} |
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static struct kunit_case memcpy_test_cases[] = { |
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KUNIT_CASE(memset_test), |
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KUNIT_CASE(memcpy_test), |
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KUNIT_CASE(memmove_test), |
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{} |
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}; |
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static struct kunit_suite memcpy_test_suite = { |
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.name = "memcpy", |
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.test_cases = memcpy_test_cases, |
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}; |
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kunit_test_suite(memcpy_test_suite); |
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MODULE_LICENSE("GPL");
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