1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 public class Main { main(String[] args)18 public static void main(String[] args) { 19 System.loadLibrary(args[0]); 20 loop(); 21 ensureJitCompiled(Main.class, "$noinline$doCall"); 22 loop(); 23 } 24 loop()25 public static void loop() { 26 Main m = new Main(); 27 for (int i = 0; i < 5000; i++) { 28 $noinline$doCall("foo"); 29 $noinline$doCall(m); 30 } 31 } 32 $noinline$doCall(Object foo)33 public static boolean $noinline$doCall(Object foo) { 34 boolean isCompiledAtEntry = !isInterpreted(); 35 boolean result = foo.equals(Main.class); 36 37 // Test that the 'equals' above did not lead to a deoptimization. 38 if (isCompiledAtEntry) { 39 if (isInterpreted()) { 40 throw new Error("Unexpected deoptimization"); 41 } 42 } 43 return result; 44 } 45 isInterpreted()46 public static native boolean isInterpreted(); ensureJitCompiled(Class<?> cls, String methodName)47 public static native void ensureJitCompiled(Class<?> cls, String methodName); 48 } 49