Merge "Add checked exceptions to HwBinder transact."

am: 6c5cc261f8

Change-Id: I3bcac03a745722acd983dc4e7bdc31ae806bdbd4

core/java/android/os/HwBinder.java

@@ -33,11 +33,14 @@ public abstract class HwBinder implements IHwBinder {
                 mNativeContext);
     }
 
+    @Override
     public final native void transact(
-            int code, HwParcel request, HwParcel reply, int flags);
+            int code, HwParcel request, HwParcel reply, int flags)
+        throws RemoteException;
 
     public abstract void onTransact(
-            int code, HwParcel request, HwParcel reply, int flags);
+            int code, HwParcel request, HwParcel reply, int flags)
+        throws RemoteException;
 
     public native final void registerService(
             ArrayList<String> interfaceChain,

core/java/android/os/HwRemoteBinder.java

@@ -32,12 +32,15 @@ public class HwRemoteBinder implements IHwBinder {
                 mNativeContext);
     }
 
+    @Override
     public IHwInterface queryLocalInterface(String descriptor) {
         return null;
     }
 
+    @Override
     public native final void transact(
-            int code, HwParcel request, HwParcel reply, int flags);
+            int code, HwParcel request, HwParcel reply, int flags)
+        throws RemoteException;
 
     public native boolean linkToDeath(DeathRecipient recipient, long cookie);
     public native boolean unlinkToDeath(DeathRecipient recipient);

core/java/android/os/IHwBinder.java

@@ -23,7 +23,8 @@ public interface IHwBinder {
     public static final int FLAG_ONEWAY = 1;
 
     public void transact(
-            int code, HwParcel request, HwParcel reply, int flags);
+            int code, HwParcel request, HwParcel reply, int flags)
+        throws RemoteException;
 
     public IHwInterface queryLocalInterface(String descriptor);
 

core/jni/android_os_HwBinder.cpp

@@ -52,6 +52,8 @@ static struct {
     jmethodID get;
 } gArrayListMethods;
 
+static jclass gErrorClass;
+
 static struct fields_t {
     jfieldID contextID;
     jmethodID onTransactID;
@@ -144,6 +146,22 @@ status_t JHwBinder::onTransact(
             replyObj.get(),
             flags);
 
+    if (env->ExceptionCheck()) {
+        jthrowable excep = env->ExceptionOccurred();
+        env->ExceptionDescribe();
+
+        if (env->IsInstanceOf(excep, gErrorClass)) {
+            /* It's an error */
+            LOG(ERROR) << "Forcefully exiting";
+            exit(1);
+        } else {
+            env->ExceptionClear();
+            LOG(ERROR) << "Uncaught exception!";
+        }
+
+        env->DeleteLocalRef(excep);
+    }
+
     status_t err = OK;
 
     if (!replyContext->wasSent()) {
@@ -356,6 +374,9 @@ int register_android_os_HwBinder(JNIEnv *env) {
     gArrayListMethods.size = GetMethodIDOrDie(env, arrayListClass, "size", "()I");
     gArrayListMethods.get = GetMethodIDOrDie(env, arrayListClass, "get", "(I)Ljava/lang/Object;");
 
+    jclass errorClass = FindClassOrDie(env, "java/lang/Error");
+    gErrorClass = MakeGlobalRefOrDie(env, errorClass);
+
     return RegisterMethodsOrDie(env, CLASS_PATH, gMethods, NELEM(gMethods));
 }
 

core/jni/android_os_HwParcel.cpp

@@ -49,7 +49,7 @@ static struct fields_t {
 
 } gFields;
 
-void signalExceptionForError(JNIEnv *env, status_t err) {
+void signalExceptionForError(JNIEnv *env, status_t err, bool canThrowRemoteException) {
     switch (err) {
         case OK:
             break;
@@ -114,8 +114,13 @@ void signalExceptionForError(JNIEnv *env, status_t err) {
 
         default:
         {
+            std::stringstream ss;
+            ss << "HwBinder Error: (" << err << ")";
+
             jniThrowException(
-                    env, "java/lang/RuntimeException", "Unknown error");
+                    env,
+                    canThrowRemoteException ? "android/os/RemoteException" : "java/lang/RuntimeException",
+                    ss.str().c_str());
 
             break;
         }

core/jni/android_os_HwParcel.h

@@ -67,7 +67,7 @@ private:
     DISALLOW_COPY_AND_ASSIGN(JHwParcel);
 };
 
-void signalExceptionForError(JNIEnv *env, status_t err);
+void signalExceptionForError(JNIEnv *env, status_t err, bool canThrowRemoteException = false);
 int register_android_os_HwParcel(JNIEnv *env);
 
 }  // namespace android

core/jni/android_os_HwRemoteBinder.cpp

@@ -347,7 +347,7 @@ static void JHwRemoteBinder_native_transact(
         JHwParcel::GetNativeContext(env, replyObj)->getParcel();
 
     status_t err = binder->transact(code, *request, reply, flags);
-    signalExceptionForError(env, err);
+    signalExceptionForError(env, err, true /* canThrowRemoteException */);
 }
 
 static jboolean JHwRemoteBinder_linkToDeath(JNIEnv* env, jobject thiz,