| /* |
| * Copyright (c) 2014 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8038048 |
| * @summary assert(null_obj->escape_state() == PointsToNode::NoEscape,etc) |
| * @modules java.base/jdk.internal.misc:+open |
| * |
| * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+DoEscapeAnalysis |
| * -XX:-TieredCompilation -Xbatch |
| * compiler.escapeAnalysis.TestUnsafePutAddressNullObjMustNotEscape |
| * |
| * @author Richard Reingruber richard DOT reingruber AT sap DOT com |
| */ |
| |
| package compiler.escapeAnalysis; |
| |
| import jdk.internal.misc.Unsafe; |
| |
| import java.lang.reflect.Field; |
| |
| public class TestUnsafePutAddressNullObjMustNotEscape { |
| |
| public static Unsafe usafe; |
| public static long mem; |
| public static long checksum; |
| |
| public static void main(String[] args) throws Exception { |
| System.out.println("EXECUTING test."); |
| |
| { |
| System.out.println("Acquiring jdk.internal.misc.Unsafe.theUnsafe using reflection."); |
| getUnsafe(); |
| System.out.println("Allocating raw memory."); |
| mem = (usafe.allocateMemory(1024) + 8L) & ~7L; |
| System.out.println("Triggering JIT compilation of the test method"); |
| triggerJitCompilationOfTestMethod(); |
| } |
| |
| System.out.println("SUCCESSFULLY passed test."); |
| } |
| |
| public static void triggerJitCompilationOfTestMethod() { |
| long sum = 0; |
| for (int ii = 50000; ii >= 0; ii--) { |
| sum = testMethod(); |
| } |
| checksum = sum; |
| } |
| |
| public static class IDGen { |
| private static long id; |
| public long nextId() { |
| return id++; |
| } |
| } |
| |
| public static long testMethod() { |
| // dummy alloc to trigger escape analysis |
| IDGen gen = new IDGen(); |
| // StoreP of null_obj to raw mem triggers assertion in escape analysis |
| usafe.putAddress(mem, 0L); |
| return gen.nextId(); |
| } |
| |
| private static void getUnsafe() throws Exception { |
| Field field = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe"); |
| field.setAccessible(true); |
| usafe = (jdk.internal.misc.Unsafe) field.get(null); |
| } |
| } |