1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31 #include "it_test_vm.h"
32
Testcase(void)33 static int Testcase(void)
34 {
35 char *p = NULL;
36 void *newAddr = NULL;
37 int pageSize;
38 int size;
39 int ret;
40
41 pageSize = getpagesize();
42 size = pageSize << 1;
43
44 p = (char *)mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
45 ICUNIT_ASSERT_NOT_EQUAL(p, MAP_FAILED, p);
46
47 /* Parameter check */
48 newAddr = mremap(0, 0, 0, 0, 0);
49 ICUNIT_ASSERT_EQUAL(newAddr, MAP_FAILED, newAddr);
50 ICUNIT_ASSERT_EQUAL(errno, EINVAL, errno);
51
52 newAddr = mremap(p, size, size, MREMAP_FIXED, 0);
53 ICUNIT_ASSERT_EQUAL(newAddr, MAP_FAILED, newAddr);
54 ICUNIT_ASSERT_EQUAL(errno, EINVAL, errno);
55
56 /* Shrink a region */
57 newAddr = mremap(p, size, pageSize, MREMAP_MAYMOVE, 0);
58 ICUNIT_ASSERT_EQUAL(newAddr, p, newAddr);
59
60 /* Remap a region by same size */
61 newAddr = mremap(p, pageSize, pageSize, MREMAP_MAYMOVE, 0);
62 ICUNIT_ASSERT_EQUAL(newAddr, p, newAddr);
63
64 /* Expand a region */
65 newAddr = mremap(p, pageSize, size, MREMAP_MAYMOVE, 0);
66 ICUNIT_ASSERT_EQUAL(newAddr, p, newAddr);
67
68 /* New region overlapping with the old one */
69 newAddr = mremap(p, size, pageSize, MREMAP_MAYMOVE | MREMAP_FIXED, p + pageSize);
70 ICUNIT_ASSERT_EQUAL(newAddr, MAP_FAILED, newAddr);
71 ICUNIT_ASSERT_EQUAL(errno, EINVAL, errno);
72
73 newAddr = mremap(p, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, p - pageSize);
74 ICUNIT_ASSERT_EQUAL(newAddr, MAP_FAILED, newAddr);
75 ICUNIT_ASSERT_EQUAL(errno, EINVAL, errno);
76
77 newAddr = mremap(p, size, size + pageSize, MREMAP_MAYMOVE | MREMAP_FIXED, p - pageSize);
78 ICUNIT_ASSERT_EQUAL(newAddr, MAP_FAILED, newAddr);
79 ICUNIT_ASSERT_EQUAL(errno, EINVAL, errno);
80
81 /* Remap to new addr */
82 newAddr = mremap(p, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, p + size);
83 ICUNIT_ASSERT_EQUAL(newAddr, p + size, newAddr);
84
85 newAddr = mremap(newAddr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, (char *)newAddr - size);
86 ICUNIT_ASSERT_EQUAL(newAddr, p, newAddr);
87
88 ret = munmap(p, size);
89 ICUNIT_ASSERT_EQUAL(ret, 0, ret);
90
91 return 0;
92 }
93
ItTestMremap001(void)94 void ItTestMremap001(void)
95 {
96 TEST_ADD_CASE("IT_MEM_MREMAP_001", Testcase, TEST_LOS, TEST_MEM, TEST_LEVEL0, TEST_FUNCTION);
97 }
98