1/*
2 * Copyright (C) 2015 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 <gtest/gtest.h>
18
19#include <memory>
20
21#include <android-base/file.h>
22#include <android-base/logging.h>
23#include <android-base/test_utils.h>
24#include <ziparchive/zip_archive.h>
25
26#if defined(__ANDROID__)
27#include <sys/system_properties.h>
28#endif
29
30#include "get_test_data.h"
31#include "read_elf.h"
32#include "utils.h"
33
34static std::string testdata_dir;
35
36#if defined(IN_CTS_TEST)
37static const std::string testdata_section = ".testzipdata";
38
39static bool ExtractTestDataFromElfSection() {
40  if (!MkdirWithParents(testdata_dir)) {
41    PLOG(ERROR) << "failed to create testdata_dir " << testdata_dir;
42    return false;
43  }
44  std::string content;
45  if (!ReadSectionFromElfFile("/proc/self/exe", testdata_section, &content)) {
46    LOG(ERROR) << "failed to read section " << testdata_section;
47    return false;
48  }
49  TemporaryFile tmp_file;
50  if (!android::base::WriteStringToFile(content, tmp_file.path)) {
51    PLOG(ERROR) << "failed to write file " << tmp_file.path;
52    return false;
53  }
54  ArchiveHelper ahelper(tmp_file.fd, tmp_file.path);
55  if (!ahelper) {
56    LOG(ERROR) << "failed to open archive " << tmp_file.path;
57    return false;
58  }
59  ZipArchiveHandle& handle = ahelper.archive_handle();
60  void* cookie;
61  int ret = StartIteration(handle, &cookie, nullptr, nullptr);
62  if (ret != 0) {
63    LOG(ERROR) << "failed to start iterating zip entries";
64    return false;
65  }
66  std::unique_ptr<void, decltype(&EndIteration)> guard(cookie, EndIteration);
67  ZipEntry entry;
68  ZipString name;
69  while (Next(cookie, &entry, &name) == 0) {
70    std::string entry_name(name.name, name.name + name.name_length);
71    std::string path = testdata_dir + entry_name;
72    // Skip dir.
73    if (path.back() == '/') {
74      continue;
75    }
76    if (!MkdirWithParents(path)) {
77      LOG(ERROR) << "failed to create dir for " << path;
78      return false;
79    }
80    FileHelper fhelper = FileHelper::OpenWriteOnly(path);
81    if (!fhelper) {
82      PLOG(ERROR) << "failed to create file " << path;
83      return false;
84    }
85    std::vector<uint8_t> data(entry.uncompressed_length);
86    if (ExtractToMemory(handle, &entry, data.data(), data.size()) != 0) {
87      LOG(ERROR) << "failed to extract entry " << entry_name;
88      return false;
89    }
90    if (!android::base::WriteFully(fhelper.fd(), data.data(), data.size())) {
91      LOG(ERROR) << "failed to write file " << path;
92      return false;
93    }
94  }
95  return true;
96}
97
98#if defined(__ANDROID__)
99class SavedPerfHardenProperty {
100 public:
101  SavedPerfHardenProperty() {
102    __system_property_get("security.perf_harden", prop_value_);
103    if (!android::base::ReadFileToString("/proc/sys/kernel/perf_event_paranoid",
104                                    &paranoid_value_)) {
105      PLOG(ERROR) << "failed to read /proc/sys/kernel/perf_event_paranoid";
106    }
107  }
108
109  ~SavedPerfHardenProperty() {
110    if (strlen(prop_value_) != 0) {
111      if (__system_property_set("security.perf_harden", prop_value_) != 0) {
112        PLOG(ERROR) << "failed to set security.perf_harden";
113        return;
114      }
115      // Sleep one second to wait for security.perf_harden changing
116      // /proc/sys/kernel/perf_event_paranoid.
117      sleep(1);
118      std::string paranoid_value;
119      if (!android::base::ReadFileToString("/proc/sys/kernel/perf_event_paranoid",
120                                           &paranoid_value)) {
121        PLOG(ERROR) << "failed to read /proc/sys/kernel/perf_event_paranoid";
122        return;
123      }
124      if (paranoid_value_ != paranoid_value) {
125        LOG(ERROR) << "failed to restore /proc/sys/kernel/perf_event_paranoid";
126      }
127    }
128  }
129
130 private:
131  char prop_value_[PROP_VALUE_MAX];
132  std::string paranoid_value_;
133};
134#endif  // defined(__ANDROID__)
135#endif  // defined(IN_CTS_TEST)
136
137int main(int argc, char** argv) {
138  InitLogging(argv, android::base::StderrLogger);
139  testing::InitGoogleTest(&argc, argv);
140  android::base::LogSeverity log_severity = android::base::WARNING;
141
142  for (int i = 1; i < argc; ++i) {
143    if (strcmp(argv[i], "-t") == 0 && i + 1 < argc) {
144      testdata_dir = argv[i + 1];
145      i++;
146    } else if (strcmp(argv[i], "--log") == 0) {
147      if (i + 1 < argc) {
148        ++i;
149        if (!GetLogSeverity(argv[i], &log_severity)) {
150          LOG(ERROR) << "Unknown log severity: " << argv[i];
151          return 1;
152        }
153      } else {
154        LOG(ERROR) << "Missing argument for --log option.\n";
155        return 1;
156      }
157    }
158  }
159  android::base::ScopedLogSeverity severity(log_severity);
160
161#if defined(IN_CTS_TEST)
162  std::unique_ptr<TemporaryDir> tmp_dir;
163  if (!::testing::GTEST_FLAG(list_tests) && testdata_dir.empty()) {
164    tmp_dir.reset(new TemporaryDir);
165    testdata_dir = std::string(tmp_dir->path) + "/";
166    if (!ExtractTestDataFromElfSection()) {
167      LOG(ERROR) << "failed to extract test data from elf section";
168      return 1;
169    }
170  }
171
172#if defined(__ANDROID__)
173  // A cts test PerfEventParanoidTest.java is testing if
174  // /proc/sys/kernel/perf_event_paranoid is 3, so restore perf_harden
175  // value after current test to not break that test.
176  SavedPerfHardenProperty saved_perf_harden;
177#endif
178#endif
179  if (!::testing::GTEST_FLAG(list_tests) && testdata_dir.empty()) {
180    printf("Usage: %s -t <testdata_dir>\n", argv[0]);
181    return 1;
182  }
183  if (testdata_dir.back() != '/') {
184    testdata_dir.push_back('/');
185  }
186  LOG(INFO) << "testdata is in " << testdata_dir;
187  return RUN_ALL_TESTS();
188}
189
190std::string GetTestData(const std::string& filename) {
191  return testdata_dir + filename;
192}
193
194const std::string& GetTestDataDir() {
195  return testdata_dir;
196}
197