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 <vector>
18
19 #include <gtest/gtest.h>
20
21 #include <unwindstack/Memory.h>
22
23 #include "LogFake.h"
24
25 namespace unwindstack {
26
27 class MemoryBufferTest : public ::testing::Test {
28 protected:
SetUp()29 void SetUp() override {
30 ResetLogs();
31 memory_.reset(new MemoryBuffer);
32 }
33 std::unique_ptr<MemoryBuffer> memory_;
34 };
35
TEST_F(MemoryBufferTest,empty)36 TEST_F(MemoryBufferTest, empty) {
37 ASSERT_EQ(0U, memory_->Size());
38 std::vector<uint8_t> buffer(1024);
39 ASSERT_FALSE(memory_->ReadFully(0, buffer.data(), 1));
40 ASSERT_EQ(nullptr, memory_->GetPtr(0));
41 ASSERT_EQ(nullptr, memory_->GetPtr(1));
42 }
43
TEST_F(MemoryBufferTest,write_read)44 TEST_F(MemoryBufferTest, write_read) {
45 memory_->Resize(256);
46 ASSERT_EQ(256U, memory_->Size());
47 ASSERT_TRUE(memory_->GetPtr(0) != nullptr);
48 ASSERT_TRUE(memory_->GetPtr(1) != nullptr);
49 ASSERT_TRUE(memory_->GetPtr(255) != nullptr);
50 ASSERT_TRUE(memory_->GetPtr(256) == nullptr);
51
52 uint8_t* data = memory_->GetPtr(0);
53 for (size_t i = 0; i < memory_->Size(); i++) {
54 data[i] = i;
55 }
56
57 std::vector<uint8_t> buffer(memory_->Size());
58 ASSERT_TRUE(memory_->ReadFully(0, buffer.data(), buffer.size()));
59 for (size_t i = 0; i < buffer.size(); i++) {
60 ASSERT_EQ(i, buffer[i]) << "Failed at byte " << i;
61 }
62 }
63
TEST_F(MemoryBufferTest,read_failures)64 TEST_F(MemoryBufferTest, read_failures) {
65 memory_->Resize(100);
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_->Resize(100);
76 std::vector<uint8_t> buffer(200);
77
78 ASSERT_FALSE(memory_->ReadFully(UINT64_MAX - 100, buffer.data(), 200));
79 }
80
TEST_F(MemoryBufferTest,Read)81 TEST_F(MemoryBufferTest, Read) {
82 memory_->Resize(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
101 } // namespace unwindstack
102