Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/tools/jcore/ByteCodeRewriter.java @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
author | trims |
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date | Thu, 27 May 2010 19:08:38 -0700 |
parents | bd02caa94611 |
children | 136b78722a08 |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2002, 2009, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
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20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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parents:
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.tools.jcore; | |
26 | |
27 import sun.jvm.hotspot.oops.*; | |
28 import sun.jvm.hotspot.interpreter.*; | |
29 import sun.jvm.hotspot.utilities.*; | |
30 import sun.jvm.hotspot.debugger.*; | |
31 import sun.jvm.hotspot.runtime.*; | |
32 | |
33 public class ByteCodeRewriter | |
34 { | |
35 private Method method; | |
36 private ConstantPool cpool; | |
37 private ConstantPoolCache cpCache; | |
38 private byte[] code; | |
39 private Bytes bytes; | |
40 | |
41 public static final boolean DEBUG = false; | |
42 private static final int jintSize = 4; | |
43 | |
44 protected void debugMessage(String message) { | |
45 System.out.println(message); | |
46 } | |
47 | |
48 public ByteCodeRewriter(Method method, ConstantPool cpool, byte[] code) { | |
49 this.method = method; | |
50 this.cpool = cpool; | |
51 this.cpCache = cpool.getCache(); | |
52 this.code = code; | |
53 this.bytes = VM.getVM().getBytes(); | |
54 | |
55 } | |
56 | |
57 protected short getConstantPoolIndex(int bci) { | |
58 // get ConstantPool index from ConstantPoolCacheIndex at given bci | |
59 short cpCacheIndex = method.getBytecodeShortArg(bci); | |
60 if (cpCache == null) { | |
61 return cpCacheIndex; | |
62 } else { | |
63 // change byte-ordering and go via cache | |
64 return (short) cpCache.getEntryAt((int) (0xFFFF & bytes.swapShort(cpCacheIndex))).getConstantPoolIndex(); | |
65 } | |
66 } | |
67 | |
68 static private void writeShort(byte[] buf, int index, short value) { | |
69 buf[index] = (byte) ((value >> 8) & 0x00FF); | |
70 buf[index + 1] = (byte) (value & 0x00FF); | |
71 } | |
72 | |
73 public void rewrite() { | |
74 int bytecode = Bytecodes._illegal; | |
75 int hotspotcode = Bytecodes._illegal; | |
76 int len = 0; | |
77 | |
78 for (int bci = 0; bci < code.length;) { | |
79 hotspotcode = Bytecodes.codeAt(method, bci); | |
80 bytecode = Bytecodes.javaCode(hotspotcode); | |
81 | |
82 if (Assert.ASSERTS_ENABLED) { | |
83 int code_from_buffer = 0xFF & code[bci]; | |
84 Assert.that(code_from_buffer == hotspotcode | |
85 || code_from_buffer == Bytecodes._breakpoint, | |
86 "Unexpected bytecode found in method bytecode buffer!"); | |
87 } | |
88 | |
89 // update the code buffer hotspot specific bytecode with the jvm bytecode | |
90 code[bci] = (byte) (0xFF & bytecode); | |
91 | |
92 short cpoolIndex = 0; | |
93 switch (bytecode) { | |
94 // bytecodes with ConstantPoolCache index | |
95 case Bytecodes._getstatic: | |
96 case Bytecodes._putstatic: | |
97 case Bytecodes._getfield: | |
98 case Bytecodes._putfield: | |
99 case Bytecodes._invokevirtual: | |
100 case Bytecodes._invokespecial: | |
101 case Bytecodes._invokestatic: | |
102 case Bytecodes._invokeinterface: { | |
103 cpoolIndex = getConstantPoolIndex(bci + 1); | |
104 writeShort(code, bci + 1, cpoolIndex); | |
105 break; | |
106 } | |
107 } | |
108 | |
109 len = Bytecodes.lengthFor(bytecode); | |
110 if (len <= 0) len = Bytecodes.lengthAt(method, bci); | |
111 | |
112 if (DEBUG) { | |
113 String operand = ""; | |
114 switch (len) { | |
115 case 2: | |
116 operand += code[bci + 1]; | |
117 break; | |
118 case 3: | |
119 operand += (cpoolIndex != 0)? cpoolIndex : | |
120 method.getBytecodeShortArg(bci + 1); | |
121 break; | |
122 case 5: | |
123 operand += method.getBytecodeIntArg(bci + 1); | |
124 break; | |
125 } | |
126 | |
127 // the operand following # is not quite like javap output. | |
128 // in particular, for goto & goto_w, the operand is PC relative | |
129 // offset for jump. Javap adds relative offset with current PC | |
130 // to give absolute bci to jump to. | |
131 | |
132 String message = "\t\t" + bci + " " + Bytecodes.name(bytecode); | |
133 if (hotspotcode != bytecode) | |
134 message += " [" + Bytecodes.name(hotspotcode) + "]"; | |
135 if (operand != "") | |
136 message += " #" + operand; | |
137 | |
138 if (DEBUG) debugMessage(message); | |
139 } | |
140 | |
141 bci += len; | |
142 } | |
143 } | |
144 } |