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Commit ec6d1c2d authored by Roman Birg's avatar Roman Birg Committed by Abhisek Devkota
Browse files

FingerprintService: synchronize access to clients 



They are not thread safe.

Ref: CYNGNOS-1213

Change-Id: I3f69279c732db73746279c0359c1ff4ee661839d
Signed-off-by: default avatarRoman Birg <roman@cyngn.com>
(cherry picked from commit ac134476)
parent add8be83

services/core/java/com/android/server/fingerprint/FingerprintService.java

+90 −81
Original line number Diff line number Diff line
@@ -51,6 +51,7 @@ import java.util.HashMap; 
import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Set;



/**

 * A service to manage multiple clients that want to access the fingerprint HAL API.
@@ -65,7 +66,8 @@ public class FingerprintService extends SystemService { 


    private static final String PARAM_WAKEUP = "wakeup";



    private ArrayMap<IBinder, ClientData> mClients = new ArrayMap<IBinder, ClientData>();

    private final Map<IBinder, ClientData> mClients

            = Collections.synchronizedMap(new ArrayMap<IBinder, ClientData>());



    private static final int MSG_NOTIFY = 10;
@@ -159,8 +161,10 @@ public class FingerprintService extends SystemService { 
    void handleNotify(int msg, int arg1, int arg2) {

        Slog.v(TAG, "handleNotify(msg=" + msg + ", arg1=" + arg1 + ", arg2=" + arg2 + ")");

        int newState = mState;

        for (Iterator<Map.Entry<IBinder, ClientData>> it = mClients.entrySet().iterator();

                it.hasNext(); ) {

        final Set<Map.Entry<IBinder, ClientData>> entries = mClients.entrySet();

        synchronized (mClients) {

            final Iterator<Map.Entry<IBinder, ClientData>> it = entries.iterator();

            while (it.hasNext()) {

                final Map.Entry<IBinder, ClientData> entry = it.next();

                IBinder client = entry.getKey();

                ClientData clientData = entry.getValue();
@@ -241,7 +245,8 @@ public class FingerprintService extends SystemService { 
                    }

                    case FingerprintManager.FINGERPRINT_TEMPLATE_REMOVED: {

                        int fingerId = arg1;

                    if (fingerId == 0) throw new IllegalStateException("Got illegal id from HAL");

                        if (fingerId == 0)

                            throw new IllegalStateException("Got illegal id from HAL");

                        FingerprintUtils.removeFingerprintIdForUser(fingerId,

                                mContext.getContentResolver(), clientData.userId);

                        try {
@@ -256,6 +261,7 @@ public class FingerprintService extends SystemService { 
                    break;

                }

            }

        }

        changeState(newState);

    }
@@ -365,8 +371,10 @@ public class FingerprintService extends SystemService { 
        mHandler.post(new Runnable() {

            @Override

            public void run() {

                for (Iterator<Map.Entry<IBinder, ClientData>> it = mClients.entrySet().iterator();

                     it.hasNext(); ) {

                final Set<Map.Entry<IBinder, ClientData>> entries = mClients.entrySet();

                synchronized (mClients) {

                    final Iterator<Map.Entry<IBinder, ClientData>> it = entries.iterator();

                    while (it.hasNext()) {

                        try {

                            ClientData clientData = it.next().getValue();

                            if (clientData != null && clientData.receiver != null) {
@@ -378,6 +386,7 @@ public class FingerprintService extends SystemService { 
                        }

                    }

                }

            }

        });

    }