1 /*
2  * Copyright 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 <android/system/suspend/ISuspendControlService.h>
18 #include <binder/IServiceManager.h>
19 #include <gtest/gtest.h>
20 #include <hardware_legacy/power.h>
21 #include <wakelock/wakelock.h>
22 
23 #include <csignal>
24 #include <cstdlib>
25 #include <string>
26 #include <thread>
27 #include <vector>
28 
29 using android::sp;
30 using android::system::suspend::ISuspendControlService;
31 using android::system::suspend::WakeLockInfo;
32 using namespace std::chrono_literals;
33 
34 namespace android {
35 
36 // Test acquiring/releasing WakeLocks concurrently with process exit.
TEST(LibpowerTest,ProcessExitTest)37 TEST(LibpowerTest, ProcessExitTest) {
38     std::atexit([] {
39         // We want to give the other thread enough time trigger a failure and
40         // dump the stack traces.
41         std::this_thread::sleep_for(1s);
42     });
43 
44     ASSERT_EXIT(
45     {
46         constexpr int numThreads = 20;
47         std::vector<std::thread> tds;
48         for (int i = 0; i < numThreads; i++) {
49             tds.emplace_back([] {
50             while (true) {
51                 // We want ids to be unique.
52                 std::string id = std::to_string(rand());
53                 ASSERT_EQ(acquire_wake_lock(PARTIAL_WAKE_LOCK, id.c_str()), 0);
54                 ASSERT_EQ(release_wake_lock(id.c_str()), 0);
55             }
56         });
57         }
58         for (auto& td : tds) {
59             td.detach();
60         }
61 
62         // Give some time for the threads to actually start.
63         std::this_thread::sleep_for(100ms);
64         std::exit(0);
65     },
66     ::testing::ExitedWithCode(0), "");
67 }
68 
69 // Stress test acquiring/releasing WakeLocks.
TEST(LibpowerTest,WakeLockStressTest)70 TEST(LibpowerTest, WakeLockStressTest) {
71     // numThreads threads will acquire/release numLocks locks each.
72     constexpr int numThreads = 20;
73     constexpr int numLocks = 1000;
74     std::vector<std::thread> tds;
75 
76     for (int i = 0; i < numThreads; i++) {
77         tds.emplace_back([i] {
78             for (int j = 0; j < numLocks; j++) {
79                 // We want ids to be unique.
80                 std::string id = std::to_string(i) + "/" + std::to_string(j);
81                 ASSERT_EQ(acquire_wake_lock(PARTIAL_WAKE_LOCK, id.c_str()), 0)
82                     << "id: " << id;
83                 ASSERT_EQ(release_wake_lock(id.c_str()), 0)
84                     << "id: " << id;;
85             }
86         });
87     }
88     for (auto& td : tds) {
89         td.join();
90     }
91 }
92 
93 class WakeLockTest : public ::testing::Test {
94    public:
SetUp()95     virtual void SetUp() override {
96         sp<IBinder> control =
97             android::defaultServiceManager()->getService(android::String16("suspend_control"));
98         ASSERT_NE(control, nullptr) << "failed to get the suspend control service";
99         controlService = interface_cast<ISuspendControlService>(control);
100     }
101 
102     // Returns true iff found.
findWakeLockInfoByName(const sp<ISuspendControlService> & service,const std::string & name,WakeLockInfo * info)103     bool findWakeLockInfoByName(const sp<ISuspendControlService>& service, const std::string& name,
104                                 WakeLockInfo* info) {
105         std::vector<WakeLockInfo> wlStats;
106         service->getWakeLockStats(&wlStats);
107         auto it = std::find_if(wlStats.begin(), wlStats.end(),
108                                [&name](const auto& x) { return x.name == name; });
109         if (it != wlStats.end()) {
110             *info = *it;
111             return true;
112         }
113         return false;
114     }
115 
116     // All userspace wake locks are registered with system suspend.
117     sp<ISuspendControlService> controlService;
118 };
119 
120 // Test RAII properties of WakeLock destructor.
TEST_F(WakeLockTest,WakeLockDestructor)121 TEST_F(WakeLockTest, WakeLockDestructor) {
122     auto name = std::to_string(rand());
123     {
124         android::wakelock::WakeLock wl{name};
125 
126         WakeLockInfo info;
127         auto success = findWakeLockInfoByName(controlService, name, &info);
128         ASSERT_TRUE(success);
129         ASSERT_EQ(info.name, name);
130         ASSERT_EQ(info.pid, getpid());
131         ASSERT_TRUE(info.isActive);
132     }
133 
134     // SystemSuspend receives wake lock release requests on hwbinder thread, while stats requests
135     // come on binder thread. Sleep to make sure that stats are reported *after* wake lock release.
136     std::this_thread::sleep_for(1ms);
137     WakeLockInfo info;
138     auto success = findWakeLockInfoByName(controlService, name, &info);
139     ASSERT_TRUE(success);
140     ASSERT_EQ(info.name, name);
141     ASSERT_EQ(info.pid, getpid());
142     ASSERT_FALSE(info.isActive);
143 }
144 
145 }  // namespace android
146