1 /*
2 * Copyright (C) 2013 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 <android-base/logging.h>
18
19 #include "base/macros.h"
20 #include "base/unix_file/fd_file.h"
21 #include "common_runtime_test.h"
22 #include "stream/buffered_output_stream.h"
23 #include "stream/file_output_stream.h"
24 #include "stream/vector_output_stream.h"
25
26 namespace art {
27 namespace linker {
28
29 class OutputStreamTest : public CommonRuntimeTest {
30 protected:
CheckOffset(off_t expected)31 void CheckOffset(off_t expected) {
32 off_t actual = output_stream_->Seek(0, kSeekCurrent);
33 EXPECT_EQ(expected, actual);
34 }
35
SetOutputStream(OutputStream & output_stream)36 void SetOutputStream(OutputStream& output_stream) {
37 output_stream_ = &output_stream;
38 }
39
GenerateTestOutput()40 void GenerateTestOutput() {
41 EXPECT_EQ(3, output_stream_->Seek(3, kSeekCurrent));
42 CheckOffset(3);
43 EXPECT_EQ(2, output_stream_->Seek(2, kSeekSet));
44 CheckOffset(2);
45 uint8_t buf[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
46 EXPECT_TRUE(output_stream_->WriteFully(buf, 2));
47 CheckOffset(4);
48 EXPECT_EQ(6, output_stream_->Seek(2, kSeekEnd));
49 CheckOffset(6);
50 EXPECT_TRUE(output_stream_->WriteFully(buf, 4));
51 CheckOffset(10);
52 EXPECT_TRUE(output_stream_->WriteFully(buf, 6));
53 EXPECT_TRUE(output_stream_->Flush());
54 }
55
CheckTestOutput(const std::vector<uint8_t> & actual)56 void CheckTestOutput(const std::vector<uint8_t>& actual) {
57 uint8_t expected[] = {
58 0, 0, 1, 2, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 5, 6
59 };
60 EXPECT_EQ(sizeof(expected), actual.size());
61 EXPECT_EQ(0, memcmp(expected, &actual[0], actual.size()));
62 }
63
64 OutputStream* output_stream_;
65 };
66
TEST_F(OutputStreamTest,File)67 TEST_F(OutputStreamTest, File) {
68 ScratchFile tmp;
69 FileOutputStream output_stream(tmp.GetFile());
70 SetOutputStream(output_stream);
71 GenerateTestOutput();
72 std::unique_ptr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
73 EXPECT_TRUE(in.get() != nullptr);
74 std::vector<uint8_t> actual(in->GetLength());
75 bool readSuccess = in->ReadFully(&actual[0], actual.size());
76 EXPECT_TRUE(readSuccess);
77 CheckTestOutput(actual);
78 }
79
TEST_F(OutputStreamTest,Buffered)80 TEST_F(OutputStreamTest, Buffered) {
81 ScratchFile tmp;
82 {
83 BufferedOutputStream buffered_output_stream(std::make_unique<FileOutputStream>(tmp.GetFile()));
84 SetOutputStream(buffered_output_stream);
85 GenerateTestOutput();
86 }
87 std::unique_ptr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
88 EXPECT_TRUE(in.get() != nullptr);
89 std::vector<uint8_t> actual(in->GetLength());
90 bool readSuccess = in->ReadFully(&actual[0], actual.size());
91 EXPECT_TRUE(readSuccess);
92 CheckTestOutput(actual);
93 }
94
TEST_F(OutputStreamTest,Vector)95 TEST_F(OutputStreamTest, Vector) {
96 std::vector<uint8_t> output;
97 VectorOutputStream output_stream("test vector output", &output);
98 SetOutputStream(output_stream);
99 GenerateTestOutput();
100 CheckTestOutput(output);
101 }
102
TEST_F(OutputStreamTest,BufferedFlush)103 TEST_F(OutputStreamTest, BufferedFlush) {
104 struct CheckingOutputStream : OutputStream {
105 CheckingOutputStream()
106 : OutputStream("fake-location"),
107 flush_called(false) { }
108 ~CheckingOutputStream() override {}
109
110 bool WriteFully(const void* buffer ATTRIBUTE_UNUSED,
111 size_t byte_count ATTRIBUTE_UNUSED) override {
112 LOG(FATAL) << "UNREACHABLE";
113 UNREACHABLE();
114 }
115
116 off_t Seek(off_t offset ATTRIBUTE_UNUSED, Whence whence ATTRIBUTE_UNUSED) override {
117 LOG(FATAL) << "UNREACHABLE";
118 UNREACHABLE();
119 }
120
121 bool Flush() override {
122 flush_called = true;
123 return true;
124 }
125
126 bool flush_called;
127 };
128
129 std::unique_ptr<CheckingOutputStream> cos = std::make_unique<CheckingOutputStream>();
130 CheckingOutputStream* checking_output_stream = cos.get();
131 BufferedOutputStream buffered(std::move(cos));
132 ASSERT_FALSE(checking_output_stream->flush_called);
133 bool flush_result = buffered.Flush();
134 ASSERT_TRUE(flush_result);
135 ASSERT_TRUE(checking_output_stream->flush_called);
136 }
137
138 } // namespace linker
139 } // namespace art
140