Mercurial > hg > graal-compiler
view test/compiler/7190310/Test7190310_unsafe.java @ 15035:bfad6492cce9
re-enable graph ordering assertion
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Wed, 09 Apr 2014 13:22:44 +0200 |
parents | 09aad8452938 |
children |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. 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 7190310 * @summary Inlining WeakReference.get(), and hoisting $referent may lead to non-terminating loops * @run main/othervm -Xbatch Test7190310_unsafe */ import java.lang.ref.*; import java.lang.reflect.*; import sun.misc.Unsafe; public class Test7190310_unsafe { static class TestObject { public String toString() { return "TestObject"; } }; private static TestObject str = new TestObject(); private static final WeakReference ref = new WeakReference(str); private TestObject obj; public static void main(String[] args) throws Exception { Class c = Test7190310_unsafe.class.getClassLoader().loadClass("sun.misc.Unsafe"); Field f = c.getDeclaredField("theUnsafe"); f.setAccessible(true); Unsafe unsafe = (Unsafe)f.get(c); f = Reference.class.getDeclaredField("referent"); f.setAccessible(true); long referent_offset = unsafe.objectFieldOffset(f); Test7190310_unsafe t = new Test7190310_unsafe(); TestObject o = new TestObject(); t.obj = o; // Warmup (compile methods) System.err.println("Warmup"); Object obj = null; for (int i = 0; i < 11000; i++) { obj = getRef0(ref); } for (int i = 0; i < 11000; i++) { obj = getRef1(unsafe, ref, referent_offset); } for (int i = 0; i < 11000; i++) { obj = getRef2(unsafe, ref, referent_offset); } for (int i = 0; i < 11000; i++) { obj = getRef3(unsafe, ref, referent_offset); } for (int i = 0; i < 11000; i++) { obj = getRef4(unsafe, t, referent_offset); } // Access verification System.err.println("Verification"); if (!verifyGet(referent_offset, unsafe)) { System.exit(97); } obj = getRef3(unsafe, t, referent_offset); if (obj != o) { System.out.println("FAILED: unsafe.getObject(Object, " + referent_offset + ") " + obj + " != " + o); System.exit(97); } obj = getRef4(unsafe, t, referent_offset); if (obj != o) { System.out.println("FAILED: unsafe.getObject(Test7190310, " + referent_offset + ") " + obj + " != " + o); System.exit(97); } } static boolean verifyGet(long referent_offset, Unsafe unsafe) throws Exception { // Access verification System.out.println("referent: " + str); Object obj = getRef0(ref); if (obj != str) { System.out.println("FAILED: weakRef.get() " + obj + " != " + str); return false; } obj = getRef1(unsafe, ref, referent_offset); if (obj != str) { System.out.println("FAILED: unsafe.getObject(weakRef, " + referent_offset + ") " + obj + " != " + str); return false; } obj = getRef2(unsafe, ref, referent_offset); if (obj != str) { System.out.println("FAILED: unsafe.getObject(abstRef, " + referent_offset + ") " + obj + " != " + str); return false; } obj = getRef3(unsafe, ref, referent_offset); if (obj != str) { System.out.println("FAILED: unsafe.getObject(Object, " + referent_offset + ") " + obj + " != " + str); return false; } return true; } static Object getRef0(WeakReference ref) throws Exception { return ref.get(); } static Object getRef1(Unsafe unsafe, WeakReference ref, long referent_offset) throws Exception { return unsafe.getObject(ref, referent_offset); } static Object getRef2(Unsafe unsafe, Reference ref, long referent_offset) throws Exception { return unsafe.getObject(ref, referent_offset); } static Object getRef3(Unsafe unsafe, Object ref, long referent_offset) throws Exception { return unsafe.getObject(ref, referent_offset); } static Object getRef4(Unsafe unsafe, Test7190310_unsafe ref, long referent_offset) throws Exception { return unsafe.getObject(ref, referent_offset); } }