Adding example java binder service fuzzer

using fuzzService API to fuzz an test service.

Test: m java_binder_service_fuzzer &&
./jazzer_helper.sh --fuzz_target java_binder_service_fuzzer --target_class ServiceFuzzer
Bug: 258075558

Change-Id: If1ff082638eaec04e8ba9c4f8f7321c952b22f82

core/java/Android.bp

@@ -425,6 +425,16 @@ filegroup {
     ],
 }
 
+// This file group is used by service fuzzer
+filegroup {
+    name: "framework-core-sources-for-fuzzers",
+    srcs: [
+        "android/os/IInterface.java",
+        "android/os/Binder.java",
+        "android/os/IBinder.java",
+    ],
+}
+
 aidl_interface {
     name: "android.os.statsbootstrap_aidl",
     unstable: true,

core/tests/fuzzers/FuzzService/FuzzBinder.java

@@ -22,7 +22,7 @@ public class FuzzBinder {
     }
 
     // DO NOT REUSE: This API should be called from fuzzer to setup JNI dependencies from
-    // libandroid_runtime. THIS IS WORKAROUND. Please file a bug if you need to use this
+    // libandroid_runtime. THIS IS WORKAROUND. Please file a bug if you need to use this.
     public static void init() {
         System.loadLibrary("android_runtime");
         registerNatives();

core/tests/fuzzers/java_service_fuzzer/Android.bp

@@ -0,0 +1,40 @@
+package {
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+aidl_interface {
+    name: "fuzzTestInterface",
+    srcs: ["fuzztest/ITestService.aidl"],
+    unstable: true,
+    backend: {
+        java: {
+            enabled: true,
+        },
+    },
+}
+
+java_fuzz {
+    name: "java_binder_service_fuzzer",
+    srcs: [
+        "ServiceFuzzer.java",
+        "TestService.java",
+        ":framework-core-sources-for-fuzzers",
+    ],
+    static_libs: [
+        "jazzer",
+        "fuzzTestInterface-java",
+        "random_parcel_lib",
+    ],
+    jni_libs: [
+        "librandom_parcel_jni",
+        "libc++",
+        "libandroid_runtime",
+    ],
+    libs: [
+        "framework",
+        "unsupportedappusage",
+        "ext",
+        "framework-res",
+    ],
+    native_bridge_supported: true,
+}

core/tests/fuzzers/java_service_fuzzer/ServiceFuzzer.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+import com.code_intelligence.jazzer.api.FuzzedDataProvider;
+
+import randomparcel.FuzzBinder;
+
+public class ServiceFuzzer {
+
+    static {
+        // Initialize fuzzService and JNI dependencies
+        FuzzBinder.init();
+    }
+
+    public static void fuzzerTestOneInput(FuzzedDataProvider data) {
+        TestService service = new TestService();
+        FuzzBinder.fuzzService(service, data.consumeRemainingAsBytes());
+    }
+}

core/tests/fuzzers/java_service_fuzzer/TestService.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+import fuzztest.ITestService;
+
+public class TestService extends ITestService.Stub {
+
+    @Override
+    public boolean repeatData(boolean token) {
+        return token;
+    }
+}

core/tests/fuzzers/java_service_fuzzer/fuzztest/ITestService.aidl

@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2022 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 fuzztest;
+
+interface ITestService {
+    boolean repeatData(boolean token);
+}