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/*
* 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);
}
}
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