Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/interpreter/Bytecode.java @ 3972:4f93f0d00802
7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc
author | tonyp |
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date | Tue, 20 Sep 2011 09:59:59 -0400 |
parents | 6a991dcb52bb |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2004, 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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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.interpreter; | |
26 | |
27 import sun.jvm.hotspot.oops.*; | |
28 import sun.jvm.hotspot.utilities.*; | |
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29 import sun.jvm.hotspot.runtime.VM; |
0 | 30 |
31 public class Bytecode { | |
32 Method method; | |
33 int bci; | |
34 static final int jintSize = 4; | |
35 static final String spaces = " "; | |
36 static final String comma = ", "; | |
37 | |
38 Bytecode(Method method, int bci) { | |
39 this.method = method; | |
40 this.bci = bci; | |
41 } | |
42 | |
43 // Address computation | |
44 // NOTE: assumes that the start of the method's bytecodes is 4-byte aligned | |
45 int alignedOffset(int offset) { | |
46 return Bits.roundTo(bci + offset, jintSize) - bci; | |
47 } | |
48 | |
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49 public int getIndexU1() { return method.getBytecodeOrBPAt(bci() + 1) & 0xFF; } |
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50 public int getIndexU2(int bc, boolean isWide) { |
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51 if (can_use_native_byte_order(bc, isWide)) { |
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52 return method.getNativeShortArg(bci() + (isWide ? 2 : 1)) & 0xFFFF; |
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53 } |
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54 return method.getBytecodeShortArg(bci() + (isWide ? 2 : 1)) & 0xFFFF; |
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55 } |
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56 public int getIndexU4() { return method.getNativeIntArg(bci() + 1); } |
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57 public boolean hasIndexU4() { return code() == Bytecodes._invokedynamic; } |
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58 |
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59 public int getIndexU1Cpcache() { return method.getBytecodeOrBPAt(bci() + 1) & 0xFF; } |
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60 public int getIndexU2Cpcache() { return method.getNativeShortArg(bci() + 1) & 0xFFFF; } |
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61 |
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62 static boolean can_use_native_byte_order(int bc, boolean is_wide) { |
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63 return (VM.getVM().isBigEndian() || Bytecodes.native_byte_order(bc /*, is_wide*/)); |
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64 } |
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65 |
0 | 66 int javaSignedWordAt(int offset) { |
67 return method.getBytecodeIntArg(bci + offset); | |
68 } | |
69 | |
70 short javaShortAt(int offset) { | |
71 return method.getBytecodeShortArg(bci + offset); | |
72 } | |
73 | |
74 byte javaByteAt(int offset) { | |
75 return method.getBytecodeByteArg(bci + offset); | |
76 } | |
77 | |
78 public Method method() { return method; } | |
79 public int bci() { return bci; } | |
80 | |
81 // hotspot byte code | |
82 public int code() { | |
83 return Bytecodes.codeAt(method(), bci()); | |
84 } | |
85 | |
86 // jvm byte code | |
87 public int javaCode() { | |
88 return Bytecodes.javaCode(code()); | |
89 } | |
90 | |
91 public String getBytecodeName() { | |
92 return Bytecodes.name(code()); | |
93 } | |
94 | |
95 public String getJavaBytecodeName() { | |
96 return Bytecodes.name(javaCode()); | |
97 } | |
98 | |
99 public int getLength() { | |
100 return Bytecodes.lengthAt(method(), bci()); | |
101 } | |
102 | |
103 public int getJavaLength() { | |
104 return Bytecodes.javaLengthAt(method(), bci()); | |
105 } | |
106 | |
107 public String toString() { | |
108 StringBuffer buf = new StringBuffer(getJavaBytecodeName()); | |
109 if (code() != javaCode()) { | |
110 buf.append(spaces); | |
111 buf.append('['); | |
112 buf.append(getBytecodeName()); | |
113 buf.append(']'); | |
114 } | |
115 return buf.toString(); | |
116 } | |
117 } |