1 /* 2 * Copyright (C) 2016 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 interface Itf { sameInvokeInterface()18 public Class sameInvokeInterface(); 19 } 20 21 public class Main implements Itf { assertEquals(Object expected, Object actual)22 public static void assertEquals(Object expected, Object actual) { 23 if (expected != actual) { 24 throw new Error("Expected " + expected + ", got " + actual); 25 } 26 } 27 assertEquals(int expected, int actual)28 public static void assertEquals(int expected, int actual) { 29 if (expected != actual) { 30 throw new Error("Expected " + expected + ", got " + actual); 31 } 32 } 33 main(String[] args)34 public static void main(String[] args) throws Exception { 35 System.loadLibrary(args[0]); 36 Main[] mains = new Main[3]; 37 Itf[] itfs = new Itf[3]; 38 itfs[0] = mains[0] = new Main(); 39 itfs[1] = mains[1] = new Subclass(); 40 itfs[2] = mains[2] = new OtherSubclass(); 41 42 // Make testInvokeVirtual and testInvokeInterface hot to get them jitted. 43 // We pass Main and Subclass to get polymorphic inlining based on calling 44 // the same method. 45 for (int i = 0; i < 10000; ++i) { 46 testInvokeVirtual(mains[0]); 47 testInvokeVirtual(mains[1]); 48 testInvokeInterface(itfs[0]); 49 testInvokeInterface(itfs[1]); 50 $noinline$testInlineToSameTarget(mains[0]); 51 $noinline$testInlineToSameTarget(mains[1]); 52 } 53 54 ensureJittedAndPolymorphicInline(); 55 56 // At this point, the JIT should have compiled both methods, and inline 57 // sameInvokeVirtual and sameInvokeInterface. 58 assertEquals(Main.class, testInvokeVirtual(mains[0])); 59 assertEquals(Main.class, testInvokeVirtual(mains[1])); 60 61 assertEquals(Itf.class, testInvokeInterface(itfs[0])); 62 assertEquals(Itf.class, testInvokeInterface(itfs[1])); 63 64 // This will trigger a deoptimization of the compiled code. 65 assertEquals(OtherSubclass.class, testInvokeVirtual(mains[2])); 66 assertEquals(OtherSubclass.class, testInvokeInterface(itfs[2])); 67 68 // Run this once to make sure we execute the JITted code. 69 $noinline$testInlineToSameTarget(mains[0]); 70 assertEquals(20001, counter); 71 } 72 sameInvokeVirtual()73 public Class sameInvokeVirtual() { 74 field.getClass(); // null check to ensure we get an inlined frame in the CodeInfo 75 return Main.class; 76 } 77 sameInvokeInterface()78 public Class sameInvokeInterface() { 79 field.getClass(); // null check to ensure we get an inlined frame in the CodeInfo 80 return Itf.class; 81 } 82 testInvokeInterface(Itf i)83 public static Class testInvokeInterface(Itf i) { 84 return i.sameInvokeInterface(); 85 } 86 testInvokeVirtual(Main m)87 public static Class testInvokeVirtual(Main m) { 88 return m.sameInvokeVirtual(); 89 } 90 $noinline$testInlineToSameTarget(Main m)91 public static void $noinline$testInlineToSameTarget(Main m) { 92 if (doThrow) throw new Error(""); 93 m.increment(); 94 } 95 96 public Object field = new Object(); 97 ensureJittedAndPolymorphicInline()98 public static native void ensureJittedAndPolymorphicInline(); 99 increment()100 public void increment() { 101 counter++; 102 } 103 public static int counter = 0; 104 public static boolean doThrow = false; 105 } 106 107 class Subclass extends Main { 108 } 109 110 class OtherSubclass extends Main { sameInvokeVirtual()111 public Class sameInvokeVirtual() { 112 return OtherSubclass.class; 113 } 114 sameInvokeInterface()115 public Class sameInvokeInterface() { 116 return OtherSubclass.class; 117 } 118 } 119