1 /*
2 * Copyright (C) 2018 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 MemoryOfflineBufferTest : public ::testing::Test {
28 protected:
SetUp()29 void SetUp() override {
30 ResetLogs();
31 memory_.reset(new MemoryOfflineBuffer(buffer_.data(), kStart, kEnd));
32 }
33
SetUpTestCase()34 static void SetUpTestCase() {
35 buffer_.resize(kLength);
36 for (size_t i = 0; i < kLength; i++) {
37 buffer_[i] = i % 189;
38 }
39 }
40
41 std::unique_ptr<MemoryOfflineBuffer> memory_;
42
43 static constexpr size_t kLength = 0x2000;
44 static constexpr uint64_t kStart = 0x1000;
45 static constexpr uint64_t kEnd = kStart + kLength;
46 static std::vector<uint8_t> buffer_;
47 };
48
49 std::vector<uint8_t> MemoryOfflineBufferTest::buffer_;
50
VerifyBuffer(uint8_t * buffer,size_t start_value,size_t length)51 static void VerifyBuffer(uint8_t* buffer, size_t start_value, size_t length) {
52 for (size_t i = 0; i < length; i++) {
53 ASSERT_EQ((start_value + i) % 189, buffer[i]) << "Failed at byte " << i;
54 }
55 }
56
TEST_F(MemoryOfflineBufferTest,read_out_of_bounds)57 TEST_F(MemoryOfflineBufferTest, read_out_of_bounds) {
58 std::vector<uint8_t> buffer(1024);
59 ASSERT_FALSE(memory_->ReadFully(0, buffer.data(), 1));
60 ASSERT_FALSE(memory_->ReadFully(0xfff, buffer.data(), 1));
61 ASSERT_FALSE(memory_->ReadFully(0xfff, buffer.data(), 2));
62 ASSERT_FALSE(memory_->ReadFully(0x3000, buffer.data(), 1));
63 ASSERT_FALSE(memory_->ReadFully(0x3001, buffer.data(), 1));
64 }
65
TEST_F(MemoryOfflineBufferTest,read)66 TEST_F(MemoryOfflineBufferTest, read) {
67 std::vector<uint8_t> buffer(1024);
68 ASSERT_TRUE(memory_->ReadFully(kStart, buffer.data(), 10));
69 ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 0, 10));
70
71 ASSERT_TRUE(memory_->ReadFully(kStart + 555, buffer.data(), 40));
72 ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 555, 40));
73
74 ASSERT_TRUE(memory_->ReadFully(kStart + kLength - 105, buffer.data(), 105));
75 ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), kLength - 105, 105));
76 }
77
TEST_F(MemoryOfflineBufferTest,read_past_end)78 TEST_F(MemoryOfflineBufferTest, read_past_end) {
79 std::vector<uint8_t> buffer(1024);
80 ASSERT_EQ(100U, memory_->Read(kStart + kLength - 100, buffer.data(), buffer.size()));
81 VerifyBuffer(buffer.data(), kLength - 100, 100);
82 }
83
TEST_F(MemoryOfflineBufferTest,read_after_reset)84 TEST_F(MemoryOfflineBufferTest, read_after_reset) {
85 std::vector<uint8_t> buffer(1024);
86 ASSERT_TRUE(memory_->ReadFully(kStart, buffer.data(), 100));
87 ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 0, 100));
88
89 memory_->Reset(&buffer_[10], 0x12000, 0x13000);
90 ASSERT_TRUE(memory_->ReadFully(0x12000, buffer.data(), 100));
91 ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 10, 100));
92
93 ASSERT_EQ(50U, memory_->Read(0x13000 - 50, buffer.data(), buffer.size()));
94 ASSERT_NO_FATAL_FAILURE(VerifyBuffer(buffer.data(), 0x1000 - 50 + 10, 50));
95 }
96
97 } // namespace unwindstack
98