1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. 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 8136421 27 * @requires (os.simpleArch == "x64" | os.simpleArch == "sparcv9" | os.simpleArch == "aarch64") 28 * @library / /testlibrary /test/lib/ 29 * @library ../common/patches 30 * @modules jdk.vm.ci.hotspot/jdk.vm.ci.hotspot 31 * @build jdk.vm.ci.hotspot/jdk.vm.ci.hotspot.CompilerToVMHelper 32 * @build compiler.jvmci.compilerToVM.ReadUncompressedOopTest 33 * @build sun.hotspot.WhiteBox 34 * @run main ClassFileInstaller 35 * sun.hotspot.WhiteBox 36 * sun.hotspot.WhiteBox$WhiteBoxPermission 37 * @run main/othervm -Xbootclasspath/a:. 38 * -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI 39 * -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI 40 * -XX:-UseCompressedOops 41 * compiler.jvmci.compilerToVM.ReadUncompressedOopTest 42 * @run main/othervm -Xbootclasspath/a:. 43 * -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI 44 * -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI 45 * -XX:+UseCompressedOops 46 * compiler.jvmci.compilerToVM.ReadUncompressedOopTest 47 */ 48 49 package compiler.jvmci.compilerToVM; 50 51 import jdk.vm.ci.hotspot.CompilerToVMHelper; 52 import jdk.test.lib.Asserts; 53 import jdk.test.lib.Utils; 54 import sun.hotspot.WhiteBox; 55 import sun.misc.Unsafe; 56 57 import java.lang.reflect.Field; 58 59 public class ReadUncompressedOopTest { 60 61 public static void main(String args[]) { 62 new ReadUncompressedOopTest().runTest(); 63 } 64 65 private void runTest() { 66 long ptr = getPtr(); 67 System.out.printf("calling readUncompressedOop(0x%x)%n", ptr); 68 Asserts.assertEQ(getClass(), 69 CompilerToVMHelper.readUncompressedOop(ptr), 70 String.format("unexpected class returned for 0x%x", ptr)); 71 } 72 73 private static final Unsafe UNSAFE = Utils.getUnsafe(); 74 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 75 private static final Class<?> CLASS = ReadUncompressedOopTest.class; 76 private static final long PTR = WB.getObjectAddress(CLASS); 77 78 private static long getPtr() { 79 Field field; 80 try { 81 field = CLASS.getDeclaredField("PTR"); 82 } catch (NoSuchFieldException nsfe) { 83 throw new Error("TESTBUG : " + nsfe, nsfe); 84 } 85 Object base = UNSAFE.staticFieldBase(field); 86 return WB.getObjectAddress(base) + UNSAFE.staticFieldOffset(field); 87 } 88 } 89