1 /* 2 * Copyright (c) 2011, 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 package jdk.vm.ci.hotspot; 24 25 import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; 26 27 import jdk.vm.ci.code.InstalledCode; 28 import jdk.vm.ci.inittimer.SuppressFBWarnings; 29 import sun.misc.Unsafe; 30 31 /** 32 * Implementation of {@link InstalledCode} for HotSpot. 33 */ 34 public abstract class HotSpotInstalledCode extends InstalledCode { 35 36 /** 37 * Total size of the code blob. 38 */ 39 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int size; 40 41 /** 42 * Start address of the code. 43 */ 44 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private long codeStart; 45 46 /** 47 * Size of the code. 48 */ 49 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int codeSize; 50 51 public HotSpotInstalledCode(String name) { 52 super(name); 53 } 54 55 /** 56 * @return the total size of this code blob 57 */ 58 public int getSize() { 59 return size; 60 } 61 62 /** 63 * @return a copy of this code blob if it is {@linkplain #isValid() valid}, null otherwise. 64 */ 65 public byte[] getBlob() { 66 if (!isValid()) { 67 return null; 68 } 69 byte[] blob = new byte[size]; 70 UNSAFE.copyMemory(null, getAddress(), blob, Unsafe.ARRAY_BYTE_BASE_OFFSET, size); 71 return blob; 72 } 73 74 @Override 75 public abstract String toString(); 76 77 @Override 78 public long getStart() { 79 return codeStart; 80 } 81 82 @Override 83 public long getCodeSize() { 84 return codeSize; 85 } 86 87 @Override 88 public byte[] getCode() { 89 if (!isValid()) { 90 return null; 91 } 92 byte[] code = new byte[codeSize]; 93 UNSAFE.copyMemory(null, codeStart, code, Unsafe.ARRAY_BYTE_BASE_OFFSET, codeSize); 94 return code; 95 } 96 }