1 /* 2 * Copyright (c) 2008, 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * 27 * @summary converted from VM Testbase jit/deoptimization/test08. 28 * VM Testbase keywords: [jit, quick] 29 * 30 * @library /vmTestbase 31 * /test/lib 32 * @build jit.deoptimization.test08.test08 33 * @run driver ExecDriver --java jit.deoptimization.test08.test08 34 */ 35 36 package jit.deoptimization.test08; 37 38 import nsk.share.TestFailure; 39 40 /* 41 * Simple recursion that should causes hotspot to deoptimize 42 * used_alot and A.foo and A.bar methods 43 * Expected result for the test is: 0 44 * 45 * run with the -XX:TraceDeoptimization to observ the result. 46 */ 47 48 class test08 { main(String[] args)49 public static void main (String[] args) { 50 A obj = new A(); 51 for (int index = 0; index < 1; index++) { 52 obj.used_alot(); 53 } 54 } 55 } 56 57 class A { 58 static int result = 0; 59 foo(int index, int iter)60 synchronized public int foo(int index, int iter) { 61 synchronized (A.a_ext) { 62 if (index == 0) 63 return result; 64 else if (iter <= sIteration / 2) { 65 result = bar(index) * foo(--index, iter); 66 } else { 67 try { 68 // halfway through the max iterations 69 // create a B. This should cause the 70 // used_alot to be deoptimized 71 // Call b.frame for the remaining part of the recursion 72 if (b == null) 73 b = Class.forName("jit.deoptimization.test08.B").newInstance(); 74 result *= ((B)b).foo(index, iter); 75 } catch (Exception x) { 76 throw new TestFailure("Class not found: B"); 77 } 78 } 79 } 80 return result; 81 } 82 83 // Does nothing but it will let be over written in class C, See Below bar(int index)84 synchronized public int bar(int index) { 85 synchronized (a_ext) { 86 for (int i=0; i<5; i++) 87 index--; 88 } 89 return 0; 90 } 91 used_alot()92 synchronized public void used_alot() { 93 int result = 1; 94 95 synchronized (a_ext) { 96 for (int index = 1; index <= sIteration; index++) { 97 result *= foo(index, index); 98 } 99 } 100 101 if (result != 0) { 102 System.err.println ("Result: " + result); 103 System.exit (1); 104 } 105 } 106 107 protected Object b = null; 108 protected static final int sIteration = 1000; 109 protected static final Object a_ext = new Object(); 110 } 111 112 class B extends A { 113 // Override foo in order to force deoptimization. 114 // Also creates and instance of class C in the last 115 // iteration in order to force A.foo to get deoptimized 116 // otherwise just do something stupid. foo(int index, int iter)117 synchronized public int foo(int index, int iter) { 118 synchronized (A.a_ext) { 119 synchronized (B.b_ext) { 120 // Make sure that this class was created at least 121 // halfway through the iteration. Simple sanity check 122 if (iter < sIteration /2) { 123 System.out.println ("class B create to early"); 124 System.exit(1); 125 } 126 127 if (iter == sIteration) { 128 try { 129 result = ((C)(Class.forName("jit.deoptimization.test08.C").newInstance())).foo(index,iter); 130 result *= ((C)(Class.forName("jit.deoptimization.test08.C").newInstance())).bar(index); 131 132 } catch (Exception x) { 133 throw new TestFailure("Class not found: C"); 134 } 135 } else { 136 result = bar(index); 137 if (index != 0) 138 result += foo(--index, iter); 139 } 140 } 141 } 142 return result; 143 } 144 protected static final Object b_ext = new Object(); 145 } 146 147 class C extends B { foo(int index, int iter)148 synchronized public int foo(int index, int iter) { 149 synchronized (A.a_ext) { 150 synchronized (B.b_ext) { 151 synchronized (C.c_ext) { 152 for (int i=0; i<iter; i++) { 153 result = bar(i); 154 if (i == iter-2) { 155 try { 156 result = ((D)(Class.forName("jit.deoptimization.test08.D").newInstance())).bar(index); 157 } catch (Exception x) { 158 throw new TestFailure("Class not found: D"); 159 } 160 } 161 } 162 } 163 } 164 } 165 return result; 166 } 167 protected static final Object c_ext = new Object(); 168 } 169 170 class D extends C { bar(int index)171 synchronized public int bar(int index) { 172 return 1; 173 } 174 } 175