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Commit bb7a2170 authored by Prabir Pradhan's avatar Prabir Pradhan
Browse files

InputManagerService: Add method to get the UID for a package 

The InputTracer will use this to tell if a UID target matches a list of
packages specified in the trace config.

Bug: 210460522
Test: manual with perfetto
Change-Id: I53bd1b33eefcc7656655e6cbfbef753406b93bd3
parent 982d9a38

services/core/java/com/android/server/input/InputManagerService.java

+13 −0
Original line number Diff line number Diff line
@@ -2604,6 +2604,19 @@ public class InputManagerService extends IInputManager.Stub 
        mBatteryController.notifyStylusGestureStarted(deviceId, eventTime);

    }



    // Native callback.

    @SuppressWarnings("unused")

    private int getPackageUid(String pkg) {

        if (TextUtils.isEmpty(pkg)) {

            return Process.INVALID_UID;

        }

        try {

            return mContext.getPackageManager().getPackageUid(pkg, 0 /*flags*/);

        } catch (PackageManager.NameNotFoundException e) {

            return Process.INVALID_UID;

        }

    }



    /**

     * Flatten a map into a string list, with value positioned directly next to the

     * key.

services/core/jni/com_android_server_input_InputManagerService.cpp

+19 −0
Original line number Diff line number Diff line
@@ -143,6 +143,7 @@ static struct { 
    jmethodID getTouchCalibrationForInputDevice;

    jmethodID notifyDropWindow;

    jmethodID getParentSurfaceForPointers;

    jmethodID getPackageUid;

} gServiceClassInfo;



static struct {
@@ -362,6 +363,7 @@ public: 
    void notifyDropWindow(const sp<IBinder>& token, float x, float y) override;

    void notifyDeviceInteraction(int32_t deviceId, nsecs_t timestamp,

                                 const std::set<gui::Uid>& uids) override;

    gui::Uid getPackageUid(std::string package) override;



    /* --- PointerControllerPolicyInterface implementation --- */
@@ -1116,6 +1118,21 @@ void NativeInputManager::notifyDeviceInteraction(int32_t deviceId, nsecs_t times 
    mInputManager->getMetricsCollector().notifyDeviceInteraction(deviceId, timestamp, uids);

}



gui::Uid NativeInputManager::getPackageUid(std::string package) {

    ATRACE_CALL();

    JNIEnv* env = jniEnv();

    ScopedLocalFrame localFrame(env);



    ScopedLocalRef<jstring> javaPackage(env, env->NewStringUTF(package.c_str()));

    const jint uid =

            env->CallIntMethod(mServiceObj, gServiceClassInfo.getPackageUid, javaPackage.get());

    if (checkAndClearExceptionFromCallback(env, "getPackageUid")) {

        LOG(FATAL) << __func__ << ": Failed to get UID for package: " << package;

    }



    return gui::Uid{static_cast<uint32_t>(uid)};

}



void NativeInputManager::notifySensorEvent(int32_t deviceId, InputDeviceSensorType sensorType,

                                           InputDeviceSensorAccuracy accuracy, nsecs_t timestamp,

                                           const std::vector<float>& values) {
@@ -3101,6 +3118,8 @@ int register_android_server_InputManager(JNIEnv* env) { 
    GET_METHOD_ID(gServiceClassInfo.getParentSurfaceForPointers, clazz,

                  "getParentSurfaceForPointers", "(I)J");



    GET_METHOD_ID(gServiceClassInfo.getPackageUid, clazz, "getPackageUid", "(Ljava/lang/String;)I");



    // InputDevice



    FIND_CLASS(gInputDeviceClassInfo.clazz, "android/view/InputDevice");