servicemanager: vintf declared API
servicemanager already has to parse VINTF configurations, so exposing
this functionality here (mirroring hwservicemanager).
Note, this API, like isDeclared is not branded as "VINTF" for future
compatibility with APEX or other interfaces.
Bug: 168715768
Test: manual
Change-Id: Ifbc44677605de757c46ef17f7f29fd83e66a8161
diff --git a/libs/binder/IServiceManager.cpp b/libs/binder/IServiceManager.cpp
index 9aa82d9..6d728dc 100644
--- a/libs/binder/IServiceManager.cpp
+++ b/libs/binder/IServiceManager.cpp
@@ -74,6 +74,7 @@
Vector<String16> listServices(int dumpsysPriority) override;
sp<IBinder> waitForService(const String16& name16) override;
bool isDeclared(const String16& name) override;
+ Vector<String16> getDeclaredInstances(const String16& interface) override;
// for legacy ABI
const String16& getInterfaceDescriptor() const override {
@@ -373,4 +374,18 @@
return declared;
}
+Vector<String16> ServiceManagerShim::getDeclaredInstances(const String16& interface) {
+ std::vector<std::string> out;
+ if (!mTheRealServiceManager->getDeclaredInstances(String8(interface).c_str(), &out).isOk()) {
+ return {};
+ }
+
+ Vector<String16> res;
+ res.setCapacity(out.size());
+ for (const std::string& instance : out) {
+ res.push(String16(instance.c_str()));
+ }
+ return res;
+}
+
} // namespace android
diff --git a/libs/binder/aidl/android/os/IServiceManager.aidl b/libs/binder/aidl/android/os/IServiceManager.aidl
index ff15460..2b1e492 100644
--- a/libs/binder/aidl/android/os/IServiceManager.aidl
+++ b/libs/binder/aidl/android/os/IServiceManager.aidl
@@ -99,6 +99,14 @@
boolean isDeclared(@utf8InCpp String name);
/**
+ * Returns all declared instances for a particular interface.
+ *
+ * For instance, if 'android.foo.IFoo/foo' is declared, and 'android.foo.IFoo' is
+ * passed here, then ["foo"] would be returned.
+ */
+ @utf8InCpp String[] getDeclaredInstances(@utf8InCpp String iface);
+
+ /**
* Request a callback when the number of clients of the service changes.
* Used by LazyServiceRegistrar to dynamically stop services that have no clients.
*/
diff --git a/libs/binder/include/binder/IServiceManager.h b/libs/binder/include/binder/IServiceManager.h
index 1d520c1..3c5ccc1 100644
--- a/libs/binder/include/binder/IServiceManager.h
+++ b/libs/binder/include/binder/IServiceManager.h
@@ -96,6 +96,11 @@
* service.
*/
virtual bool isDeclared(const String16& name) = 0;
+
+ /**
+ * Get all instances of a service as declared in the VINTF manifest
+ */
+ virtual Vector<String16> getDeclaredInstances(const String16& interface) = 0;
};
sp<IServiceManager> defaultServiceManager();
diff --git a/libs/fakeservicemanager/ServiceManager.cpp b/libs/fakeservicemanager/ServiceManager.cpp
index 6964324..4ecbe53 100644
--- a/libs/fakeservicemanager/ServiceManager.cpp
+++ b/libs/fakeservicemanager/ServiceManager.cpp
@@ -61,4 +61,16 @@
return mNameToService.find(name) != mNameToService.end();
}
+Vector<String16> ServiceManager::getDeclaredInstances(const String16& name) {
+ Vector<String16> out;
+ const String16 prefix = name + String16("/");
+ for (const auto& [registeredName, service] : mNameToService) {
+ (void) service;
+ if (registeredName.startsWith(prefix)) {
+ out.add(String16(registeredName.string() + prefix.size()));
+ }
+ }
+ return out;
+}
+
} // namespace android
diff --git a/libs/fakeservicemanager/ServiceManager.h b/libs/fakeservicemanager/ServiceManager.h
index a6b6b84..4ef47fb 100644
--- a/libs/fakeservicemanager/ServiceManager.h
+++ b/libs/fakeservicemanager/ServiceManager.h
@@ -46,6 +46,8 @@
bool isDeclared(const String16& name) override;
+ Vector<String16> getDeclaredInstances(const String16& iface) override;
+
private:
std::map<String16, sp<IBinder>> mNameToService;
};