1 /*
2 * Copyright (C) 2017 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 <stdint.h>
18 #include <string.h>
19
20 #include <memory>
21 #include <vector>
22
23 #include <gtest/gtest.h>
24
25 #include <unwindstack/Memory.h>
26
27 #include "MemoryFake.h"
28
29 namespace unwindstack {
30
TEST(MemoryRangeTest,read)31 TEST(MemoryRangeTest, read) {
32 std::vector<uint8_t> src(1024);
33 memset(src.data(), 0x4c, 1024);
34 MemoryFake* memory_fake = new MemoryFake;
35 std::shared_ptr<Memory> process_memory(memory_fake);
36 memory_fake->SetMemory(9001, src);
37
38 MemoryRange range(process_memory, 9001, src.size(), 0);
39
40 std::vector<uint8_t> dst(1024);
41 ASSERT_TRUE(range.ReadFully(0, dst.data(), src.size()));
42 for (size_t i = 0; i < 1024; i++) {
43 ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
44 }
45 }
46
TEST(MemoryRangeTest,read_near_limit)47 TEST(MemoryRangeTest, read_near_limit) {
48 std::vector<uint8_t> src(4096);
49 memset(src.data(), 0x4c, 4096);
50 MemoryFake* memory_fake = new MemoryFake;
51 std::shared_ptr<Memory> process_memory(memory_fake);
52 memory_fake->SetMemory(1000, src);
53
54 MemoryRange range(process_memory, 1000, 1024, 0);
55
56 std::vector<uint8_t> dst(1024);
57 ASSERT_TRUE(range.ReadFully(1020, dst.data(), 4));
58 for (size_t i = 0; i < 4; i++) {
59 ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
60 }
61
62 // Verify that reads outside of the range will fail.
63 ASSERT_FALSE(range.ReadFully(1020, dst.data(), 5));
64 ASSERT_FALSE(range.ReadFully(1024, dst.data(), 1));
65 ASSERT_FALSE(range.ReadFully(1024, dst.data(), 1024));
66
67 // Verify that reading up to the end works.
68 ASSERT_TRUE(range.ReadFully(1020, dst.data(), 4));
69 }
70
TEST(MemoryRangeTest,read_overflow)71 TEST(MemoryRangeTest, read_overflow) {
72 std::vector<uint8_t> buffer(100);
73
74 std::shared_ptr<Memory> process_memory(new MemoryFakeAlwaysReadZero);
75 std::unique_ptr<MemoryRange> overflow(new MemoryRange(process_memory, 100, 200, 0));
76 ASSERT_FALSE(overflow->ReadFully(UINT64_MAX - 10, buffer.data(), 100));
77 }
78
TEST(MemoryRangeTest,Read)79 TEST(MemoryRangeTest, Read) {
80 std::vector<uint8_t> src(4096);
81 memset(src.data(), 0x4c, 4096);
82 MemoryFake* memory_fake = new MemoryFake;
83 std::shared_ptr<Memory> process_memory(memory_fake);
84 memory_fake->SetMemory(1000, src);
85
86 MemoryRange range(process_memory, 1000, 1024, 0);
87 std::vector<uint8_t> dst(1024);
88 ASSERT_EQ(4U, range.Read(1020, dst.data(), 1024));
89 for (size_t i = 0; i < 4; i++) {
90 ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
91 }
92 }
93
94 } // namespace unwindstack
95