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.code; 24 25 /** 26 * Represents a compiled instance of a method. It may have been invalidated or removed in the 27 * meantime. 28 */ 29 public class InstalledCode { 30 31 /** 32 * Raw address of this code blob. 33 */ 34 private long address; 35 36 /** 37 * Counts how often the address field was reassigned. 38 */ 39 private long version; 40 41 protected final String name; 42 43 public InstalledCode(String name) { 44 this.name = name; 45 } 46 47 public final void setAddress(long address) { 48 this.address = address; 49 version++; 50 } 51 52 /** 53 * @return the address of this code blob 54 */ 55 public final long getAddress() { 56 return address; 57 } 58 59 /** 60 * @return the address of this code blob 61 */ 62 public final long getVersion() { 63 return version; 64 } 65 66 /** 67 * Returns the name of this code blob. 68 */ 69 public String getName() { 70 return name; 71 } 72 73 /** 74 * Returns the start address of this installed code if it is {@linkplain #isValid() valid}, 0 75 * otherwise. 76 */ 77 public long getStart() { 78 return 0; 79 } 80 81 /** 82 * Returns the number of instruction bytes for this code. 83 */ 84 public long getCodeSize() { 85 return 0; 86 } 87 88 /** 89 * Returns a copy of this installed code if it is {@linkplain #isValid() valid}, null otherwise. 90 */ 91 public byte[] getCode() { 92 return null; 93 } 94 95 /** 96 * @return true if the code represented by this object is still valid, false otherwise (may 97 * happen due to deopt, etc.) 98 */ 99 public boolean isValid() { 100 return address != 0; 101 } 102 103 /** 104 * Invalidates this installed code such that any subsequent 105 * {@linkplain #executeVarargs(Object...) invocation} will throw an 106 * {@link InvalidInstalledCodeException}. 107 */ 108 public void invalidate() { 109 throw new UnsupportedOperationException(); 110 } 111 112 /** 113 * Executes the installed code with a variable number of arguments. 114 * 115 * @param args the array of object arguments 116 * @return the value returned by the executed code 117 */ 118 @SuppressWarnings("unused") 119 public Object executeVarargs(Object... args) throws InvalidInstalledCodeException { 120 throw new UnsupportedOperationException(); 121 } 122 }