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 */
23package jdk.vm.ci.hotspot;
24
25import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE;
26
27import jdk.internal.misc.Unsafe;
28import jdk.vm.ci.code.InstalledCode;
29
30/**
31 * Implementation of {@link InstalledCode} for HotSpot.
32 */
33public abstract class HotSpotInstalledCode extends InstalledCode {
34
35    /**
36     * Total size of the code blob.
37     */
38    @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int size;
39
40    /**
41     * Start address of the code.
42     */
43    @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private long codeStart;
44
45    /**
46     * Size of the code.
47     */
48    @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int codeSize;
49
50    public HotSpotInstalledCode(String name) {
51        super(name);
52    }
53
54    /**
55     * @return the total size of this code blob
56     */
57    public int getSize() {
58        return size;
59    }
60
61    @Override
62    public abstract String toString();
63
64    @Override
65    public long getStart() {
66        return codeStart;
67    }
68
69    public long getCodeSize() {
70        return codeSize;
71    }
72
73    @Override
74    public byte[] getCode() {
75        if (!isValid()) {
76            return null;
77        }
78        byte[] code = new byte[codeSize];
79        UNSAFE.copyMemory(null, codeStart, code, Unsafe.ARRAY_BYTE_BASE_OFFSET, codeSize);
80        return code;
81    }
82}
83