1 /* 2 * Copyright (c) 2014 SAP SE. 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 * @bug 8038048 27 * @summary assert(null_obj->escape_state() == PointsToNode::NoEscape,etc) 28 * @modules java.base/jdk.internal.misc 29 * 30 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+DoEscapeAnalysis 31 * -XX:-TieredCompilation -Xbatch 32 * compiler.escapeAnalysis.TestUnsafePutAddressNullObjMustNotEscape 33 * 34 * @author Richard Reingruber richard DOT reingruber AT sap DOT com 35 */ 36 37 package compiler.escapeAnalysis; 38 39 import jdk.internal.misc.Unsafe; 40 41 import java.lang.reflect.Field; 42 43 public class TestUnsafePutAddressNullObjMustNotEscape { 44 45 public static Unsafe usafe; 46 public static long mem; 47 public static long checksum; 48 49 public static void main(String[] args) throws Exception { 50 System.out.println("EXECUTING test."); 51 52 { 53 System.out.println("Acquiring jdk.internal.misc.Unsafe.theUnsafe using reflection."); 54 getUnsafe(); 55 System.out.println("Allocating raw memory."); 56 mem = (usafe.allocateMemory(1024) + 8L) & ~7L; 57 System.out.println("Triggering JIT compilation of the test method"); 58 triggerJitCompilationOfTestMethod(); 59 } 60 61 System.out.println("SUCCESSFULLY passed test."); 62 } 63 64 public static void triggerJitCompilationOfTestMethod() { 65 long sum = 0; 66 for (int ii = 50000; ii >= 0; ii--) { 67 sum = testMethod(); 68 } 69 checksum = sum; 70 } 71 72 public static class IDGen { 73 private static long id; 74 public long nextId() { 75 return id++; 76 } 77 } 78 79 public static long testMethod() { 80 // dummy alloc to trigger escape analysis 81 IDGen gen = new IDGen(); 82 // StoreP of null_obj to raw mem triggers assertion in escape analysis 83 usafe.putAddress(mem, 0L); 84 return gen.nextId(); 85 } 86 87 private static void getUnsafe() throws Exception { 88 Field field = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe"); 89 field.setAccessible(true); 90 usafe = (jdk.internal.misc.Unsafe) field.get(null); 91 } 92 }