1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* Copyright (C) 2024 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "BackendUnifiedServiceManager.h"
#include <android/os/IAccessor.h>
#include <binder/RpcSession.h>
#if defined(__BIONIC__) && !defined(__ANDROID_VNDK__)
#include <android-base/properties.h>
#endif
namespace android {
using AidlServiceManager = android::os::IServiceManager;
using IAccessor = android::os::IAccessor;
BackendUnifiedServiceManager::BackendUnifiedServiceManager(const sp<AidlServiceManager>& impl)
: mTheRealServiceManager(impl) {}
sp<AidlServiceManager> BackendUnifiedServiceManager::getImpl() {
return mTheRealServiceManager;
}
binder::Status BackendUnifiedServiceManager::getService(const ::std::string& name,
sp<IBinder>* _aidl_return) {
os::Service service;
binder::Status status = getService2(name, &service);
*_aidl_return = service.get<os::Service::Tag::binder>();
return status;
}
binder::Status BackendUnifiedServiceManager::getService2(const ::std::string& name,
os::Service* _out) {
os::Service service;
binder::Status status = mTheRealServiceManager->getService2(name, &service);
if (status.isOk()) {
return toBinderService(name, service, _out);
}
return status;
}
binder::Status BackendUnifiedServiceManager::checkService(const ::std::string& name,
os::Service* _out) {
os::Service service;
binder::Status status = mTheRealServiceManager->checkService(name, &service);
if (status.isOk()) {
return toBinderService(name, service, _out);
}
return status;
}
binder::Status BackendUnifiedServiceManager::toBinderService(const ::std::string& name,
const os::Service& in,
os::Service* _out) {
switch (in.getTag()) {
case os::Service::Tag::binder: {
if (in.get<os::Service::Tag::binder>() == nullptr) {
// failed to find a service. Check to see if we have any local
// injected Accessors for this service.
os::Service accessor;
binder::Status status = getInjectedAccessor(name, &accessor);
if (!status.isOk()) {
*_out = os::Service::make<os::Service::Tag::binder>(nullptr);
return status;
}
if (accessor.getTag() == os::Service::Tag::accessor &&
accessor.get<os::Service::Tag::accessor>() != nullptr) {
ALOGI("Found local injected service for %s, will attempt to create connection",
name.c_str());
// Call this again using the accessor Service to get the real
// service's binder into _out
return toBinderService(name, accessor, _out);
}
}
*_out = in;
return binder::Status::ok();
}
case os::Service::Tag::accessor: {
sp<IBinder> accessorBinder = in.get<os::Service::Tag::accessor>();
sp<IAccessor> accessor = interface_cast<IAccessor>(accessorBinder);
if (accessor == nullptr) {
ALOGE("Service#accessor doesn't have accessor. VM is maybe starting...");
*_out = os::Service::make<os::Service::Tag::binder>(nullptr);
return binder::Status::ok();
}
auto request = [=] {
os::ParcelFileDescriptor fd;
binder::Status ret = accessor->addConnection(&fd);
if (ret.isOk()) {
return base::unique_fd(fd.release());
} else {
ALOGE("Failed to connect to RpcSession: %s", ret.toString8().c_str());
return base::unique_fd(-1);
}
};
auto session = RpcSession::make();
status_t status = session->setupPreconnectedClient(base::unique_fd{}, request);
if (status != OK) {
ALOGE("Failed to set up preconnected binder RPC client: %s",
statusToString(status).c_str());
return binder::Status::fromStatusT(status);
}
session->setSessionSpecificRoot(accessorBinder);
*_out = os::Service::make<os::Service::Tag::binder>(session->getRootObject());
return binder::Status::ok();
}
default: {
LOG_ALWAYS_FATAL("Unknown service type: %d", in.getTag());
}
}
}
binder::Status BackendUnifiedServiceManager::addService(const ::std::string& name,
const sp<IBinder>& service,
bool allowIsolated, int32_t dumpPriority) {
return mTheRealServiceManager->addService(name, service, allowIsolated, dumpPriority);
}
binder::Status BackendUnifiedServiceManager::listServices(
int32_t dumpPriority, ::std::vector<::std::string>* _aidl_return) {
return mTheRealServiceManager->listServices(dumpPriority, _aidl_return);
}
binder::Status BackendUnifiedServiceManager::registerForNotifications(
const ::std::string& name, const sp<os::IServiceCallback>& callback) {
return mTheRealServiceManager->registerForNotifications(name, callback);
}
binder::Status BackendUnifiedServiceManager::unregisterForNotifications(
const ::std::string& name, const sp<os::IServiceCallback>& callback) {
return mTheRealServiceManager->unregisterForNotifications(name, callback);
}
binder::Status BackendUnifiedServiceManager::isDeclared(const ::std::string& name,
bool* _aidl_return) {
return mTheRealServiceManager->isDeclared(name, _aidl_return);
}
binder::Status BackendUnifiedServiceManager::getDeclaredInstances(
const ::std::string& iface, ::std::vector<::std::string>* _aidl_return) {
return mTheRealServiceManager->getDeclaredInstances(iface, _aidl_return);
}
binder::Status BackendUnifiedServiceManager::updatableViaApex(
const ::std::string& name, ::std::optional<::std::string>* _aidl_return) {
return mTheRealServiceManager->updatableViaApex(name, _aidl_return);
}
binder::Status BackendUnifiedServiceManager::getUpdatableNames(
const ::std::string& apexName, ::std::vector<::std::string>* _aidl_return) {
return mTheRealServiceManager->getUpdatableNames(apexName, _aidl_return);
}
binder::Status BackendUnifiedServiceManager::getConnectionInfo(
const ::std::string& name, ::std::optional<os::ConnectionInfo>* _aidl_return) {
return mTheRealServiceManager->getConnectionInfo(name, _aidl_return);
}
binder::Status BackendUnifiedServiceManager::registerClientCallback(
const ::std::string& name, const sp<IBinder>& service,
const sp<os::IClientCallback>& callback) {
return mTheRealServiceManager->registerClientCallback(name, service, callback);
}
binder::Status BackendUnifiedServiceManager::tryUnregisterService(const ::std::string& name,
const sp<IBinder>& service) {
return mTheRealServiceManager->tryUnregisterService(name, service);
}
binder::Status BackendUnifiedServiceManager::getServiceDebugInfo(
::std::vector<os::ServiceDebugInfo>* _aidl_return) {
return mTheRealServiceManager->getServiceDebugInfo(_aidl_return);
}
[[clang::no_destroy]] static std::once_flag gUSmOnce;
[[clang::no_destroy]] static sp<BackendUnifiedServiceManager> gUnifiedServiceManager;
sp<BackendUnifiedServiceManager> getBackendUnifiedServiceManager() {
std::call_once(gUSmOnce, []() {
#if defined(__BIONIC__) && !defined(__ANDROID_VNDK__)
/* wait for service manager */ {
using std::literals::chrono_literals::operator""s;
using android::base::WaitForProperty;
while (!WaitForProperty("servicemanager.ready", "true", 1s)) {
ALOGE("Waited for servicemanager.ready for a second, waiting another...");
}
}
#endif
sp<AidlServiceManager> sm = nullptr;
while (sm == nullptr) {
sm = interface_cast<AidlServiceManager>(
ProcessState::self()->getContextObject(nullptr));
if (sm == nullptr) {
ALOGE("Waiting 1s on context object on %s.",
ProcessState::self()->getDriverName().c_str());
sleep(1);
}
}
gUnifiedServiceManager = sp<BackendUnifiedServiceManager>::make(sm);
});
return gUnifiedServiceManager;
}
} // namespace android
|