| /* |
| * Copyright (C) 2019 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. |
| */ |
| |
| public class Main { |
| public static final boolean PRINT = false; |
| |
| public static void doNothingPtr() {} |
| |
| public static void doNothingIdx() {} |
| |
| public static void DbgPrint(String str) { |
| if (PRINT) { |
| System.out.println(str); |
| } |
| } |
| |
| public static long GetId(String name) { |
| return GetMethodId(true, Main.class, name, "()V"); |
| } |
| |
| public static void main(String[] args) { |
| System.loadLibrary(args[0]); |
| System.out.println("JNI Type is: " + GetJniType()); |
| long expect_ptr_id = GetId("doNothingPtr"); |
| DbgPrint(String.format("expected_ptr_id is 0x%x", expect_ptr_id)); |
| if (expect_ptr_id % 4 != 0) { |
| throw new Error("ID " + expect_ptr_id + " is not aligned!"); |
| } else { |
| System.out.println("pointer ID looks like a pointer!"); |
| } |
| SetToPointerIds(); |
| System.out.println("JNI Type is: " + GetJniType()); |
| long expect_ptr_id2 = GetId("doNothingIdx"); |
| DbgPrint(String.format("expected_ptr_id2 is 0x%x", expect_ptr_id2)); |
| if (expect_ptr_id2 % 4 != 0) { |
| throw new Error("ID " + expect_ptr_id + " is not aligned!"); |
| } else { |
| System.out.println("pointer2 ID looks like a pointer!"); |
| } |
| long again_ptr_id = GetId("doNothingPtr"); |
| if (expect_ptr_id != again_ptr_id) { |
| throw new Error( |
| "Got different id values for same method. " + expect_ptr_id + " vs " + again_ptr_id); |
| } else { |
| System.out.println("pointer ID remains a pointer!"); |
| } |
| } |
| |
| private static native String GetJniType(); |
| private static native void SetToPointerIds(); |
| private static native long GetMethodId(boolean is_static, Class k, String name, String sig); |
| } |