1 /*
2 * Copyright (C) 2019 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "utils/FileMap.h"
18
19 #include <gtest/gtest.h>
20
21 #include "android-base/file.h"
22
TEST(FileMap,zero_length_mapping)23 TEST(FileMap, zero_length_mapping) {
24 // http://b/119818070 "app crashes when reading asset of zero length".
25 // mmap fails with EINVAL for a zero length region.
26 TemporaryFile tf;
27 ASSERT_TRUE(tf.fd != -1);
28
29 android::FileMap m;
30 ASSERT_TRUE(m.create("test", tf.fd, 4096, 0, true));
31 ASSERT_STREQ("test", m.getFileName());
32 ASSERT_EQ(0u, m.getDataLength());
33 ASSERT_EQ(4096, m.getDataOffset());
34 }
35
TEST(FileMap,large_offset)36 TEST(FileMap, large_offset) {
37 // Make sure that an offset > INT32_MAX will not fail the create
38 // function. See http://b/155662887.
39 TemporaryFile tf;
40 ASSERT_TRUE(tf.fd != -1);
41
42 off64_t offset = INT32_MAX + 1024LL;
43
44 // Make the temporary file large enough to pass the mmap.
45 ASSERT_EQ(offset, lseek64(tf.fd, offset, SEEK_SET));
46 char value = 0;
47 ASSERT_EQ(1, write(tf.fd, &value, 1));
48
49 android::FileMap m;
50 ASSERT_TRUE(m.create("test", tf.fd, offset, 0, true));
51 ASSERT_STREQ("test", m.getFileName());
52 ASSERT_EQ(0u, m.getDataLength());
53 ASSERT_EQ(offset, m.getDataOffset());
54 }
55
TEST(FileMap,offset_overflow)56 TEST(FileMap, offset_overflow) {
57 // Make sure that an end that overflows SIZE_MAX will not abort.
58 // See http://b/156997193.
59 TemporaryFile tf;
60 ASSERT_TRUE(tf.fd != -1);
61
62 off64_t offset = 200;
63 size_t length = SIZE_MAX;
64
65 android::FileMap m;
66 ASSERT_FALSE(m.create("test", tf.fd, offset, length, true));
67 }
68