Test binder callbacks
Make sure that the VM can asynchronously call back to the app, and
vice versa. This is mostly to ensure that all the necessary thread
pools exist.
While I'm here, suppress one AIDL warning, and promote any new ones to
errors.
Bug: 268335700
Test: atest MicrodroidTests
Change-Id: I6b6d957f6e5d645e76eeee0454843debe6af7730
diff --git a/tests/aidl/Android.bp b/tests/aidl/Android.bp
index d59ca7e..ed4e8ff 100644
--- a/tests/aidl/Android.bp
+++ b/tests/aidl/Android.bp
@@ -6,6 +6,10 @@
name: "com.android.microdroid.testservice",
srcs: ["com/android/microdroid/testservice/**/*.aidl"],
unstable: true,
+ flags: [
+ "-Werror",
+ "-Wno-mixed-oneway",
+ ],
backend: {
java: {
gen_rpc: true,
diff --git a/tests/aidl/com/android/microdroid/testservice/IAppCallback.aidl b/tests/aidl/com/android/microdroid/testservice/IAppCallback.aidl
new file mode 100644
index 0000000..9859090
--- /dev/null
+++ b/tests/aidl/com/android/microdroid/testservice/IAppCallback.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2023 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.
+ */
+package com.android.microdroid.testservice;
+
+import com.android.microdroid.testservice.IVmCallback;
+
+/**
+ * An interface exposed by the app for callbacks from the VM.
+ *
+ * {@hide}
+ */
+interface IAppCallback {
+ /** Invites the app to call vmCallback#echoMessage() */
+ void setVmCallback(IVmCallback vmCallback);
+
+ /** Asynchronusly called by the VM in response to a call to echoMessage(). */
+ void onEchoRequestReceived(String message);
+}
diff --git a/tests/aidl/com/android/microdroid/testservice/ITestService.aidl b/tests/aidl/com/android/microdroid/testservice/ITestService.aidl
index 66dbe4b..36c3aaf 100644
--- a/tests/aidl/com/android/microdroid/testservice/ITestService.aidl
+++ b/tests/aidl/com/android/microdroid/testservice/ITestService.aidl
@@ -15,7 +15,12 @@
*/
package com.android.microdroid.testservice;
-/** {@hide} */
+import com.android.microdroid.testservice.IAppCallback;
+
+/**
+ * This is the service exposed by the test payload, called by the test app.
+ * {@hide}
+ */
interface ITestService {
const long SERVICE_PORT = 5678;
@@ -62,6 +67,9 @@
/** Returns flags for the given mountPoint. */
int getMountFlags(String mountPoint);
+ /** Requests the VM to asynchronously call appCallback.setVmCallback() */
+ void requestCallback(IAppCallback appCallback);
+
/**
* Request the service to exit, triggering the termination of the VM. This may cause any
* requests in flight to fail.
diff --git a/tests/aidl/com/android/microdroid/testservice/IVmCallback.aidl b/tests/aidl/com/android/microdroid/testservice/IVmCallback.aidl
new file mode 100644
index 0000000..617d184
--- /dev/null
+++ b/tests/aidl/com/android/microdroid/testservice/IVmCallback.aidl
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2023 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.
+ */
+package com.android.microdroid.testservice;
+
+/**
+ * An interface exposed by the VM for callbacks from the app.
+ *
+ * {@hide}
+ */
+interface IVmCallback {
+ /** Requests the VM to asynchronously call the app's onEchoRequestReceived() callback. */
+ void echoMessage(String message);
+}