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 { 18 static volatile boolean done = false; 19 20 public static void main(String[] args) { 21 // Run a thread for 30 seconds, allocating memory and triggering garbage 22 // collection. 23 // Time is limited to 30 seconds to not make this test too long. The test used 24 // to trigger the failure around 1 every 10 runs. 25 Thread t = new Thread() { 26 public void run() { 27 long time = System.currentTimeMillis(); 28 while (System.currentTimeMillis() - time < 30000) { 29 for (int j = 0; j < 10000; j++) { 30 o = new Object[1000]; 31 } 32 Runtime.getRuntime().gc(); 33 Thread.yield(); 34 } 35 Main.done = true; 36 } 37 Object o; 38 }; 39 // Make the thread a daemon to quit early in case of an 40 // exception thrown below. 41 t.setDaemon(true); 42 t.start(); 43 44 // Run 'foo' as long as the test runs. 45 while (!done) { 46 double res = foo(staticMain); 47 if (res != 529.0) { 48 throw new Error("Unexpected result " + res); 49 } 50 } 51 } 52 53 public static double foo(Main main) { 54 // Use up all D registers on arm64. 55 double d1 = main.field1; 56 double d2 = main.field2; 57 double d3 = main.field3; 58 double d4 = main.field4; 59 double d5 = main.field5; 60 double d6 = main.field6; 61 double d7 = main.field7; 62 double d8 = main.field8; 63 double d9 = main.field9; 64 double d10 = main.field10; 65 double d11 = main.field11; 66 double d12 = main.field12; 67 double d13 = main.field13; 68 double d14 = main.field14; 69 double d15 = main.field15; 70 double d16 = main.field16; 71 double d17 = main.field17; 72 double d18 = main.field18; 73 double d19 = main.field19; 74 double d20 = main.field20; 75 double d21 = main.field21; 76 double d22 = main.field22; 77 double d23 = main.field23; 78 double d24 = main.field24; 79 double d25 = main.field25; 80 double d26 = main.field26; 81 double d27 = main.field27; 82 double d28 = main.field28; 83 double d29 = main.field29; 84 double d30 = main.field30; 85 double d31 = main.field31; 86 double d32 = main.field32; 87 88 // Trigger a read barrier. This used to make the test trip on ARM64 as 89 // the read barrier stub used to not restore the D registers. 90 double p = main.objectField.field1; 91 92 return p + d1 + d2 + d3 + d4 + d5 + d6 + d7 + d8 + d9 + d10 + d11 + d12 + 93 d13 + d14 + d15 + d16 + d17 + d18 + d19 + d20 + d21 + d22 + d23 + d24 + 94 d25 + d26 + d27 + d28 + d29 + d30 + d31 + d32; 95 } 96 97 // Initialize objects here and not in 'main' to avoid having 98 // these objects in roots. 99 public static Main staticMain = new Main(); 100 static { 101 staticMain.objectField = new Main(); 102 } 103 104 public Main objectField; 105 106 public double field1 = 1.0; 107 public double field2 = 2.0; 108 public double field3 = 3.0; 109 public double field4 = 4.0; 110 public double field5 = 5.0; 111 public double field6 = 6.0; 112 public double field7 = 7.0; 113 public double field8 = 8.0; 114 public double field9 = 9.0; 115 public double field10 = 10.0; 116 public double field11 = 11.0; 117 public double field12 = 12.0; 118 public double field13 = 13.0; 119 public double field14 = 14.0; 120 public double field15 = 15.0; 121 public double field16 = 16.0; 122 public double field17 = 17.0; 123 public double field18 = 18.0; 124 public double field19 = 19.0; 125 public double field20 = 20.0; 126 public double field21 = 21.0; 127 public double field22 = 22.0; 128 public double field23 = 23.0; 129 public double field24 = 24.0; 130 public double field25 = 25.0; 131 public double field26 = 26.0; 132 public double field27 = 27.0; 133 public double field28 = 28.0; 134 public double field29 = 29.0; 135 public double field30 = 30.0; 136 public double field31 = 31.0; 137 public double field32 = 32.0; 138 } 139
