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