1 /*
2 * Copyright (C) 2020 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 "fakeservicemanager/FakeServiceManager.h"
18
19 using android::sp;
20 using android::FakeServiceManager;
21 using android::setDefaultServiceManager;
22
23 namespace android {
24
FakeServiceManager()25 FakeServiceManager::FakeServiceManager() {}
26
getService(const String16 & name) const27 sp<IBinder> FakeServiceManager::getService( const String16& name) const {
28 // Servicemanager is single-threaded and cannot block. This method exists for legacy reasons.
29 return checkService(name);
30 }
31
checkService(const String16 & name) const32 sp<IBinder> FakeServiceManager::checkService( const String16& name) const {
33 std::lock_guard<std::mutex> l(mMutex);
34
35 auto it = mNameToService.find(name);
36 if (it == mNameToService.end()) {
37 return nullptr;
38 }
39 return it->second;
40 }
41
addService(const String16 & name,const sp<IBinder> & service,bool,int)42 status_t FakeServiceManager::addService(const String16& name, const sp<IBinder>& service,
43 bool /*allowIsolated*/,
44 int /*dumpsysFlags*/) {
45 std::lock_guard<std::mutex> l(mMutex);
46
47 if (service == nullptr) {
48 return UNEXPECTED_NULL;
49 }
50 mNameToService[name] = service;
51 return NO_ERROR;
52 }
53
listServices(int)54 Vector<String16> FakeServiceManager::listServices(int /*dumpsysFlags*/) {
55 std::lock_guard<std::mutex> l(mMutex);
56
57 Vector<String16> services;
58 for (auto const& [name, service] : mNameToService) {
59 (void) service;
60 services.push_back(name);
61 }
62 return services;
63 }
64
onAsBinder()65 IBinder* FakeServiceManager::onAsBinder() {
66 return nullptr;
67 }
68
waitForService(const String16 & name)69 sp<IBinder> FakeServiceManager::waitForService(const String16& name) {
70 return checkService(name);
71 }
72
isDeclared(const String16 & name)73 bool FakeServiceManager::isDeclared(const String16& name) {
74 std::lock_guard<std::mutex> l(mMutex);
75
76 return mNameToService.find(name) != mNameToService.end();
77 }
78
getDeclaredInstances(const String16 & name)79 Vector<String16> FakeServiceManager::getDeclaredInstances(const String16& name) {
80 std::lock_guard<std::mutex> l(mMutex);
81
82 Vector<String16> out;
83 const String16 prefix = name + String16("/");
84 for (const auto& [registeredName, service] : mNameToService) {
85 (void) service;
86 if (registeredName.startsWith(prefix)) {
87 out.add(String16(registeredName.c_str() + prefix.size()));
88 }
89 }
90 return out;
91 }
92
updatableViaApex(const String16 & name)93 std::optional<String16> FakeServiceManager::updatableViaApex(const String16& name) {
94 (void)name;
95 return std::nullopt;
96 }
97
getUpdatableNames(const String16 & apexName)98 Vector<String16> FakeServiceManager::getUpdatableNames(const String16& apexName) {
99 (void)apexName;
100 return {};
101 }
102
getConnectionInfo(const String16 & name)103 std::optional<IServiceManager::ConnectionInfo> FakeServiceManager::getConnectionInfo(
104 const String16& name) {
105 (void)name;
106 return std::nullopt;
107 }
108
registerForNotifications(const String16 &,const sp<LocalRegistrationCallback> &)109 status_t FakeServiceManager::registerForNotifications(const String16&,
110 const sp<LocalRegistrationCallback>&) {
111 return INVALID_OPERATION;
112 }
113
unregisterForNotifications(const String16 &,const sp<LocalRegistrationCallback> &)114 status_t FakeServiceManager::unregisterForNotifications(const String16&,
115 const sp<LocalRegistrationCallback>&) {
116 return INVALID_OPERATION;
117 }
118
getServiceDebugInfo()119 std::vector<IServiceManager::ServiceDebugInfo> FakeServiceManager::getServiceDebugInfo() {
120 std::vector<IServiceManager::ServiceDebugInfo> ret;
121 return ret;
122 }
123
clear()124 void FakeServiceManager::clear() {
125 std::map<String16, sp<IBinder>> backup;
126
127 {
128 std::lock_guard<std::mutex> l(mMutex);
129 backup = mNameToService;
130 mNameToService.clear();
131 }
132
133 // destructors may access FSM, so avoid recursive lock
134 backup.clear(); // explicit
135
136 // TODO: destructors may have added more services here - may want
137 // to check this or abort
138 }
139 } // namespace android
140
141 [[clang::no_destroy]] static sp<FakeServiceManager> gFakeServiceManager;
142 [[clang::no_destroy]] static std::once_flag gSmOnce;
143
144 extern "C" {
145
146 // Setup FakeServiceManager to mock dependencies in test using this API for rust backend
setupFakeServiceManager()147 void setupFakeServiceManager() {
148 /* Create a FakeServiceManager instance and add required services */
149 std::call_once(gSmOnce, [&]() {
150 gFakeServiceManager = new FakeServiceManager();
151 android::setDefaultServiceManager(gFakeServiceManager);
152 });
153 }
154
155 // Clear existing services from Fake SM for rust backend
clearFakeServiceManager()156 void clearFakeServiceManager() {
157 LOG_ALWAYS_FATAL_IF(gFakeServiceManager == nullptr, "Fake Service Manager is not available. Forgot to call setupFakeServiceManager?");
158 gFakeServiceManager->clear();
159 }
160 } //extern "C"
161