1 /*
2 * Copyright (C) 2016 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
19 #include <vector>
20
21 #include <gtest/gtest.h>
22
23 #include "LogFake.h"
24 #include "MemoryBuffer.h"
25
26 namespace unwindstack {
27
28 class MemoryBufferTest : public ::testing::Test {
29 protected:
SetUp()30 void SetUp() override { ResetLogs(); }
31 std::unique_ptr<MemoryBuffer> memory_;
32 };
33
TEST_F(MemoryBufferTest,empty)34 TEST_F(MemoryBufferTest, empty) {
35 memory_.reset(new MemoryBuffer(0));
36 ASSERT_EQ(0U, memory_->Size());
37 std::vector<uint8_t> buffer(1024);
38 ASSERT_FALSE(memory_->ReadFully(0, buffer.data(), 1));
39 ASSERT_EQ(nullptr, memory_->GetPtr(0));
40 ASSERT_EQ(nullptr, memory_->GetPtr(1));
41 }
42
TEST_F(MemoryBufferTest,write_read)43 TEST_F(MemoryBufferTest, write_read) {
44 memory_.reset(new MemoryBuffer(256));
45 ASSERT_EQ(256U, memory_->Size());
46 ASSERT_TRUE(memory_->GetPtr(0) != nullptr);
47 ASSERT_TRUE(memory_->GetPtr(1) != nullptr);
48 ASSERT_TRUE(memory_->GetPtr(255) != nullptr);
49 ASSERT_TRUE(memory_->GetPtr(256) == nullptr);
50
51 uint8_t* data = memory_->GetPtr(0);
52 for (size_t i = 0; i < memory_->Size(); i++) {
53 data[i] = i;
54 }
55
56 std::vector<uint8_t> buffer(memory_->Size());
57 ASSERT_TRUE(memory_->ReadFully(0, buffer.data(), buffer.size()));
58 for (size_t i = 0; i < buffer.size(); i++) {
59 ASSERT_EQ(i, buffer[i]) << "Failed at byte " << i;
60 }
61 }
62
TEST_F(MemoryBufferTest,read_failures)63 TEST_F(MemoryBufferTest, read_failures) {
64 memory_.reset(new MemoryBuffer(100));
65 ASSERT_EQ(100U, memory_->Size());
66 std::vector<uint8_t> buffer(200);
67 ASSERT_FALSE(memory_->ReadFully(0, buffer.data(), 101));
68 ASSERT_FALSE(memory_->ReadFully(100, buffer.data(), 1));
69 ASSERT_FALSE(memory_->ReadFully(101, buffer.data(), 2));
70 ASSERT_FALSE(memory_->ReadFully(99, buffer.data(), 2));
71 ASSERT_TRUE(memory_->ReadFully(99, buffer.data(), 1));
72 }
73
TEST_F(MemoryBufferTest,read_failure_overflow)74 TEST_F(MemoryBufferTest, read_failure_overflow) {
75 memory_.reset(new MemoryBuffer(100));
76 ASSERT_EQ(100U, memory_->Size());
77 std::vector<uint8_t> buffer(200);
78 ASSERT_FALSE(memory_->ReadFully(UINT64_MAX - 100, buffer.data(), 200));
79 }
80
TEST_F(MemoryBufferTest,read_checks)81 TEST_F(MemoryBufferTest, read_checks) {
82 memory_.reset(new MemoryBuffer(256));
83 ASSERT_EQ(256U, memory_->Size());
84 ASSERT_TRUE(memory_->GetPtr(0) != nullptr);
85 ASSERT_TRUE(memory_->GetPtr(1) != nullptr);
86 ASSERT_TRUE(memory_->GetPtr(255) != nullptr);
87 ASSERT_TRUE(memory_->GetPtr(256) == nullptr);
88
89 uint8_t* data = memory_->GetPtr(0);
90 for (size_t i = 0; i < memory_->Size(); i++) {
91 data[i] = i;
92 }
93
94 std::vector<uint8_t> buffer(memory_->Size());
95 ASSERT_EQ(128U, memory_->Read(128, buffer.data(), buffer.size()));
96 for (size_t i = 0; i < 128; i++) {
97 ASSERT_EQ(128 + i, buffer[i]) << "Failed at byte " << i;
98 }
99 }
100
TEST_F(MemoryBufferTest,resize_too_large)101 TEST_F(MemoryBufferTest, resize_too_large) {
102 memory_.reset(new MemoryBuffer(SIZE_MAX));
103 ASSERT_EQ(0U, memory_->Size());
104 }
105
TEST_F(MemoryBufferTest,read_checks_non_zero_offset)106 TEST_F(MemoryBufferTest, read_checks_non_zero_offset) {
107 memory_.reset(new MemoryBuffer(256, 1000));
108 ASSERT_EQ(256U, memory_->Size());
109 ASSERT_TRUE(memory_->GetPtr(0) == nullptr);
110 ASSERT_TRUE(memory_->GetPtr(1) == nullptr);
111 ASSERT_TRUE(memory_->GetPtr(999) == nullptr);
112 ASSERT_TRUE(memory_->GetPtr(1000) != nullptr);
113 ASSERT_TRUE(memory_->GetPtr(1255) != nullptr);
114 ASSERT_TRUE(memory_->GetPtr(1256) == nullptr);
115
116 uint8_t* data = memory_->GetPtr(1000);
117 for (size_t i = 0; i < memory_->Size(); i++) {
118 data[i] = i;
119 }
120
121 std::vector<uint8_t> buffer(memory_->Size());
122 ASSERT_EQ(128U, memory_->Read(1128, buffer.data(), buffer.size()));
123 for (size_t i = 0; i < 128; i++) {
124 ASSERT_EQ(128 + i, buffer[i]) << "Failed at byte " << i;
125 }
126 }
127
TEST_F(MemoryBufferTest,reads_non_zero_offset)128 TEST_F(MemoryBufferTest, reads_non_zero_offset) {
129 memory_.reset(new MemoryBuffer(256, 1000));
130 ASSERT_EQ(256U, memory_->Size());
131 std::vector<uint8_t> buffer(256);
132 ASSERT_EQ(0U, memory_->Read(900, buffer.data(), buffer.size()));
133 ASSERT_EQ(0U, memory_->Read(999, buffer.data(), buffer.size()));
134 ASSERT_EQ(256U, memory_->Read(1000, buffer.data(), buffer.size()));
135 ASSERT_EQ(246U, memory_->Read(1010, buffer.data(), buffer.size()));
136 ASSERT_EQ(1U, memory_->Read(1255, buffer.data(), buffer.size()));
137 ASSERT_EQ(0U, memory_->Read(1256, buffer.data(), buffer.size()));
138 }
139
140 } // namespace unwindstack
141