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 {
31 ResetLogs();
32 memory_.reset(new MemoryBuffer);
33 }
34 std::unique_ptr<MemoryBuffer> memory_;
35 };
36
TEST_F(MemoryBufferTest,empty)37 TEST_F(MemoryBufferTest, empty) {
38 ASSERT_EQ(0U, memory_->Size());
39 std::vector<uint8_t> buffer(1024);
40 ASSERT_FALSE(memory_->ReadFully(0, buffer.data(), 1));
41 ASSERT_EQ(nullptr, memory_->GetPtr(0));
42 ASSERT_EQ(nullptr, memory_->GetPtr(1));
43 }
44
TEST_F(MemoryBufferTest,write_read)45 TEST_F(MemoryBufferTest, write_read) {
46 ASSERT_TRUE(memory_->Resize(256));
47 ASSERT_EQ(256U, memory_->Size());
48 ASSERT_TRUE(memory_->GetPtr(0) != nullptr);
49 ASSERT_TRUE(memory_->GetPtr(1) != nullptr);
50 ASSERT_TRUE(memory_->GetPtr(255) != nullptr);
51 ASSERT_TRUE(memory_->GetPtr(256) == nullptr);
52
53 uint8_t* data = memory_->GetPtr(0);
54 for (size_t i = 0; i < memory_->Size(); i++) {
55 data[i] = i;
56 }
57
58 std::vector<uint8_t> buffer(memory_->Size());
59 ASSERT_TRUE(memory_->ReadFully(0, buffer.data(), buffer.size()));
60 for (size_t i = 0; i < buffer.size(); i++) {
61 ASSERT_EQ(i, buffer[i]) << "Failed at byte " << i;
62 }
63 }
64
TEST_F(MemoryBufferTest,read_failures)65 TEST_F(MemoryBufferTest, read_failures) {
66 ASSERT_TRUE(memory_->Resize(100));
67 std::vector<uint8_t> buffer(200);
68 ASSERT_FALSE(memory_->ReadFully(0, buffer.data(), 101));
69 ASSERT_FALSE(memory_->ReadFully(100, buffer.data(), 1));
70 ASSERT_FALSE(memory_->ReadFully(101, buffer.data(), 2));
71 ASSERT_FALSE(memory_->ReadFully(99, buffer.data(), 2));
72 ASSERT_TRUE(memory_->ReadFully(99, buffer.data(), 1));
73 }
74
TEST_F(MemoryBufferTest,read_failure_overflow)75 TEST_F(MemoryBufferTest, read_failure_overflow) {
76 ASSERT_TRUE(memory_->Resize(100));
77 std::vector<uint8_t> buffer(200);
78
79 ASSERT_FALSE(memory_->ReadFully(UINT64_MAX - 100, buffer.data(), 200));
80 }
81
TEST_F(MemoryBufferTest,Read)82 TEST_F(MemoryBufferTest, Read) {
83 ASSERT_TRUE(memory_->Resize(256));
84 ASSERT_EQ(256U, memory_->Size());
85 ASSERT_TRUE(memory_->GetPtr(0) != nullptr);
86 ASSERT_TRUE(memory_->GetPtr(1) != nullptr);
87 ASSERT_TRUE(memory_->GetPtr(255) != nullptr);
88 ASSERT_TRUE(memory_->GetPtr(256) == nullptr);
89
90 uint8_t* data = memory_->GetPtr(0);
91 for (size_t i = 0; i < memory_->Size(); i++) {
92 data[i] = i;
93 }
94
95 std::vector<uint8_t> buffer(memory_->Size());
96 ASSERT_EQ(128U, memory_->Read(128, buffer.data(), buffer.size()));
97 for (size_t i = 0; i < 128; i++) {
98 ASSERT_EQ(128 + i, buffer[i]) << "Failed at byte " << i;
99 }
100 }
101
TEST_F(MemoryBufferTest,Resize)102 TEST_F(MemoryBufferTest, Resize) {
103 ASSERT_TRUE(memory_->Resize(256));
104
105 ASSERT_TRUE(memory_->Resize(1024));
106 }
107
108 extern "C" void __hwasan_init() __attribute__((weak));
109
TEST_F(MemoryBufferTest,Resize_too_large)110 TEST_F(MemoryBufferTest, Resize_too_large) {
111 if (&__hwasan_init != 0) {
112 GTEST_SKIP() << "Tests fails hwasan allocation size too large check.";
113 }
114 ASSERT_FALSE(memory_->Resize(SIZE_MAX));
115 }
116
117 } // namespace unwindstack
118