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comparison agent/src/share/classes/sun/jvm/hotspot/utilities/soql/JSJavaFrame.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2004-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.utilities.soql;
26
27 import java.util.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.oops.*;
30 import sun.jvm.hotspot.runtime.*;
31
32 public class JSJavaFrame extends DefaultScriptObject {
33 private static final int FIELD_METHOD = 0;
34 private static final int FIELD_BCI = 1;
35 private static final int FIELD_LINE_NUMBER = 2;
36 private static final int FIELD_LOCALS = 3;
37 private static final int FIELD_THIS_OBJECT = 4;
38 private static final int FIELD_THREAD = 5;
39 private static final int FIELD_UNDEFINED = -1;
40
41 public JSJavaFrame(JavaVFrame jvf, JSJavaFactory fac) {
42 this.jvf = jvf;
43 this.factory = fac;
44 }
45
46 public Object get(String name) {
47 int fieldID = getFieldID(name);
48 switch (fieldID) {
49 case FIELD_METHOD:
50 return getMethod();
51 case FIELD_BCI:
52 return new Integer(getBCI());
53 case FIELD_LINE_NUMBER:
54 return new Integer(getLineNumber());
55 case FIELD_LOCALS:
56 return getLocals();
57 case FIELD_THIS_OBJECT:
58 return getThisObject();
59 case FIELD_THREAD:
60 return getThread();
61 case FIELD_UNDEFINED:
62 default:
63 return super.get(name);
64 }
65 }
66
67 public Object[] getIds() {
68 Object[] fieldNames = fields.keySet().toArray();
69 Object[] superFields = super.getIds();
70 Object[] res = new Object[fieldNames.length + superFields.length];
71 System.arraycopy(fieldNames, 0, res, 0, fieldNames.length);
72 System.arraycopy(superFields, 0, res, fieldNames.length, superFields.length);
73 return res;
74 }
75
76 public boolean has(String name) {
77 if (getFieldID(name) != FIELD_UNDEFINED) {
78 return true;
79 } else {
80 return super.has(name);
81 }
82 }
83
84 public void put(String name, Object value) {
85 if (getFieldID(name) == FIELD_UNDEFINED) {
86 super.put(name, value);
87 }
88 }
89
90 public String toString() {
91 StringBuffer buf = new StringBuffer();
92 buf.append("Frame (method=");
93 buf.append(jvf.getMethod().externalNameAndSignature());
94 buf.append(", bci=");
95 buf.append(getBCI());
96 buf.append(", line=");
97 buf.append(getLineNumber());
98 buf.append(')');
99 return buf.toString();
100 }
101
102 //-- Internals only below this point
103 private static Map fields = new HashMap();
104 private static void addField(String name, int fieldId) {
105 fields.put(name, new Integer(fieldId));
106 }
107
108 private static int getFieldID(String name) {
109 Integer res = (Integer) fields.get(name);
110 return (res != null)? res.intValue() : FIELD_UNDEFINED;
111 }
112
113 static {
114 addField("method", FIELD_METHOD);
115 addField("bci", FIELD_BCI);
116 addField("line", FIELD_LINE_NUMBER);
117 addField("locals", FIELD_LOCALS);
118 addField("thisObject", FIELD_THIS_OBJECT);
119 addField("thread", FIELD_THREAD);
120 }
121
122 private JSJavaObject getMethod() {
123 return factory.newJSJavaObject(jvf.getMethod());
124 }
125
126 private int getBCI() {
127 return jvf.getBCI();
128 }
129
130 private int getLineNumber() {
131 int bci = jvf.getBCI();
132 if (bci == -1) {
133 return 0;
134 } else {
135 int lineNum = jvf.getMethod().getLineNumberFromBCI(bci);
136 return (lineNum <= 0)? 0 : lineNum;
137 }
138 }
139
140 private synchronized JSMap getLocals() {
141 if (localsCache == null) {
142 Map map = new HashMap();
143 localsCache = factory.newJSMap(map);
144 StackValueCollection values = jvf.getLocals();
145 Method method = jvf.getMethod();
146 if (method.isNative() || ! method.hasLocalVariableTable() ||
147 values == null) {
148 return localsCache;
149 }
150
151 LocalVariableTableElement[] localVars = method.getLocalVariableTable();
152 int bci = getBCI();
153 List visibleVars = new ArrayList(0);
154 for (int i = 0; i < localVars.length; i++) {
155 LocalVariableTableElement cur = localVars[i];
156 if (cur.getStartBCI() >= bci && cur.getLength() > 0) {
157 visibleVars.add(cur);
158 }
159 }
160
161 OopHandle handle = null;
162 ObjectHeap heap = VM.getVM().getObjectHeap();
163 for (Iterator varItr = visibleVars.iterator(); varItr.hasNext();) {
164 LocalVariableTableElement cur = (LocalVariableTableElement) varItr.next();
165 String name = method.getConstants().getSymbolAt(cur.getNameCPIndex()).asString();
166 int slot = cur.getSlot();
167
168 String signature = method.getConstants().getSymbolAt(cur.getDescriptorCPIndex()).asString();
169 BasicType variableType = BasicType.charToBasicType(signature.charAt(0));
170 Object value = null;
171 if (variableType == BasicType.T_BOOLEAN) {
172 value = Boolean.valueOf(values.booleanAt(slot));
173 } else if (variableType == BasicType.T_CHAR) {
174 value = new Character(values.charAt(slot));
175 } else if (variableType == BasicType.T_FLOAT) {
176 value = new Float(values.floatAt(slot));
177 } else if (variableType == BasicType.T_DOUBLE) {
178 value = new Double(values.doubleAt(slot));
179 } else if (variableType == BasicType.T_BYTE) {
180 value = new Byte(values.byteAt(slot));
181 } else if (variableType == BasicType.T_SHORT) {
182 value = new Short(values.shortAt(slot));
183 } else if (variableType == BasicType.T_INT) {
184 value = new Integer(values.intAt(slot));
185 } else if (variableType == BasicType.T_LONG) {
186 value = new Long(values.longAt(slot));
187 } else if (variableType == BasicType.T_OBJECT ||
188 variableType == BasicType.T_ARRAY) {
189 handle = values.oopHandleAt(slot);
190 value = factory.newJSJavaObject(heap.newOop(handle));
191 } else {
192 // ignore
193 }
194 map.put(name, value);
195 }
196 }
197 return localsCache;
198 }
199
200 private JSJavaObject getThisObject() {
201 Method method = jvf.getMethod();
202 if (method.isStatic()) {
203 return null;
204 }
205 StackValueCollection values = jvf.getLocals();
206 if (values != null) {
207 // 'this' at index 0.
208 OopHandle handle = values.oopHandleAt(0);
209 ObjectHeap heap = VM.getVM().getObjectHeap();
210 return factory.newJSJavaObject(heap.newOop(handle));
211 } else {
212 // can't get locals, return null.
213 return null;
214 }
215 }
216
217 private JSJavaThread getThread() {
218 return factory.newJSJavaThread(jvf.getThread());
219 }
220
221 private final JavaVFrame jvf;
222 private final JSJavaFactory factory;
223 private JSMap localsCache;
224 }