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 <libgen.h>
20 
21 #include <memory>
22 
23 #include <android-base/file.h>
24 #include <android-base/logging.h>
25 #include <android-base/strings.h>
26 
27 #if defined(__ANDROID__)
28 #include <android-base/properties.h>
29 #endif
30 
31 #include "command.h"
32 #include "environment.h"
33 #include "get_test_data.h"
34 #include "read_elf.h"
35 #include "test_util.h"
36 #include "utils.h"
37 #include "workload.h"
38 
39 static std::string testdata_dir;
40 
41 #if defined(__ANDROID__)
42 
43 class ScopedEnablingPerf {
44  public:
45   ScopedEnablingPerf() {
46     prop_value_ = android::base::GetProperty("security.perf_harden", "");
47     SetProp("0");
48   }
49 
50   ~ScopedEnablingPerf() {
51     if (!prop_value_.empty()) {
52       SetProp(prop_value_);
53     }
54   }
55 
56  private:
57   void SetProp(const std::string& value) {
58     android::base::SetProperty("security.perf_harden", value);
59 
60     // Sleep one second to wait for security.perf_harden changing
61     // /proc/sys/kernel/perf_event_paranoid.
62     sleep(1);
63   }
64 
65   std::string prop_value_;
66 };
67 
68 #endif  // defined(__ANDROID__)
69 
70 int main(int argc, char** argv) {
71   // To test profiling apps, simpleperf_unit_test needs to copy itself to the app's directory,
72   // and run the binary as simpleperf executable.
73   if (android::base::Basename(argv[0]) == "simpleperf") {
74     return RunSimpleperfCmd(argc, argv) ? 0 : 1;
75   }
76 
77   android::base::InitLogging(argv, android::base::StderrLogger);
78   android::base::LogSeverity log_severity = android::base::WARNING;
79   testdata_dir = std::string(dirname(argv[0])) + "/testdata";
80   for (int i = 1; i < argc; ++i) {
81     if (strcmp(argv[i], "-t") == 0 && i + 1 < argc) {
82       testdata_dir = argv[i + 1];
83       i++;
84     } else if (strcmp(argv[i], "--log") == 0) {
85       if (i + 1 < argc) {
86         ++i;
87         if (!GetLogSeverity(argv[i], &log_severity)) {
88           LOG(ERROR) << "Unknown log severity: " << argv[i];
89           return 1;
90         }
91       } else {
92         LOG(ERROR) << "Missing argument for --log option.\n";
93         return 1;
94       }
95     }
96   }
97   android::base::ScopedLogSeverity severity(log_severity);
98 
99 #if defined(__ANDROID__)
100   // A cts test PerfEventParanoidTest.java is testing if
101   // /proc/sys/kernel/perf_event_paranoid is 3, so restore perf_harden
102   // value after current test to not break that test.
103   ScopedEnablingPerf scoped_enabling_perf;
104 #endif
105 
106   testing::InitGoogleTest(&argc, argv);
107   if (!::testing::GTEST_FLAG(list_tests)) {
108     if (!IsDir(testdata_dir)) {
109       LOG(ERROR) << "testdata wasn't found. Use \"" << argv[0] << " -t <testdata_dir>\"";
110       return 1;
111     }
112   }
113   if (!android::base::EndsWith(testdata_dir, OS_PATH_SEPARATOR)) {
114     testdata_dir += OS_PATH_SEPARATOR;
115   }
116   LOG(INFO) << "testdata is in " << testdata_dir;
117   return RUN_ALL_TESTS();
118 }
119 
120 std::string GetTestData(const std::string& filename) {
121   return testdata_dir + filename;
122 }
123 
124 const std::string& GetTestDataDir() {
125   return testdata_dir;
126 }
127