1 /* |
1 /* |
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. |
2 * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * |
4 * |
5 * This code is free software; you can redistribute it and/or modify it |
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 |
6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. |
7 * published by the Free Software Foundation. |
20 * or visit www.oracle.com if you need additional information or have any |
20 * or visit www.oracle.com if you need additional information or have any |
21 * questions. |
21 * questions. |
22 */ |
22 */ |
23 package jdk.vm.ci.hotspot; |
23 package jdk.vm.ci.hotspot; |
24 |
24 |
25 import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; |
25 import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; |
26 |
26 |
27 import jdk.internal.misc.Unsafe; |
|
28 import jdk.vm.ci.code.InstalledCode; |
27 import jdk.vm.ci.code.InstalledCode; |
29 |
28 |
30 /** |
29 /** |
31 * Implementation of {@link InstalledCode} for HotSpot. |
30 * Implementation of {@link InstalledCode} for HotSpot representing a {@code CodeBlob}. The address |
|
31 * of the {@code CodeBlob} is stored in {@link InstalledCode#address}. |
32 */ |
32 */ |
33 public abstract class HotSpotInstalledCode extends InstalledCode { |
33 public abstract class HotSpotInstalledCode extends InstalledCode { |
34 |
34 |
35 /** |
35 /** |
36 * Total size of the code blob. |
36 * Total size of the code blob (i.e. {@code CodeBlob::size()}). |
37 */ |
37 */ |
38 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int size; |
38 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int size; |
39 |
39 |
40 /** |
40 /** |
41 * Start address of the code. |
41 * Start address of the code (i.e. {@code CodeBlob::code_begin()}). |
42 */ |
42 */ |
43 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private long codeStart; |
43 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private long codeStart; |
44 |
44 |
45 /** |
45 /** |
46 * Size of the code. |
46 * Size of the code (i.e. {@code CodeBlob::code_size()}). |
47 */ |
47 */ |
48 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int codeSize; |
48 @SuppressFBWarnings(value = "UWF_UNWRITTEN_FIELD", justification = "field is set by the native part") private int codeSize; |
49 |
49 |
50 public HotSpotInstalledCode(String name) { |
50 public HotSpotInstalledCode(String name) { |
51 super(name); |
51 super(name); |
52 } |
52 } |
53 |
53 |
54 /** |
54 /** |
55 * @return the total size of this code blob |
55 * Gets the value of {@code CodeBlob::size()}. |
56 */ |
56 */ |
57 public int getSize() { |
57 public int getSize() { |
58 return size; |
58 return size; |
59 } |
59 } |
60 |
60 |
61 @Override |
61 @Override |
62 public abstract String toString(); |
62 public abstract String toString(); |
63 |
63 |
|
64 /** |
|
65 * Gets the value of {@code CodeBlob::code_begin()} if {@linkplain #isValid() valid}, 0 |
|
66 * otherwise. |
|
67 */ |
64 @Override |
68 @Override |
65 public long getStart() { |
69 public long getStart() { |
66 return codeStart; |
70 return codeStart; |
67 } |
71 } |
68 |
72 |
|
73 /** |
|
74 * Gets the value of {@code CodeBlob::code_size()} if {@linkplain #isValid() valid}, 0 |
|
75 * otherwise. |
|
76 */ |
69 public long getCodeSize() { |
77 public long getCodeSize() { |
70 return codeSize; |
78 return codeSize; |
71 } |
79 } |
72 |
80 |
73 @Override |
81 @Override |
74 public byte[] getCode() { |
82 public byte[] getCode() { |
75 if (!isValid()) { |
83 return compilerToVM().getCode(this); |
76 return null; |
|
77 } |
|
78 byte[] code = new byte[codeSize]; |
|
79 UNSAFE.copyMemory(null, codeStart, code, Unsafe.ARRAY_BYTE_BASE_OFFSET, codeSize); |
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80 return code; |
|
81 } |
84 } |
82 } |
85 } |