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comparison agent/src/share/classes/sun/jvm/hotspot/debugger/windbg/DLL.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002-2003 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.debugger.windbg;
26
27 import sun.jvm.hotspot.debugger.*;
28 import sun.jvm.hotspot.debugger.win32.coff.*;
29 import sun.jvm.hotspot.debugger.cdbg.*;
30 import sun.jvm.hotspot.utilities.Assert;
31 import sun.jvm.hotspot.utilities.memo.*;
32
33 /** Provides a simple wrapper around the COFF library which handles
34 relocation. A DLL can represent either a DLL or an EXE file. */
35
36 public class DLL implements LoadObject {
37
38 public DLL(WindbgDebugger dbg, String filename, long size, Address relocation) throws COFFException {
39 this.dbg = dbg;
40 fullPathName = filename;
41 this.size = size;
42 file = new MemoizedObject() {
43 public Object computeValue() {
44 return COFFFileParser.getParser().parse(fullPathName);
45 }
46 };
47 addr = relocation;
48 }
49
50 /** This constructor was originally used to fetch the DLL's name out
51 of the target process to match it up with the known DLL names,
52 before the fetching of the DLL names and bases was folded into
53 one command. It is no longer used. If it is used, getName() will
54 return null and getSize() will return 0. */
55 public DLL(Address base) throws COFFException {
56 this.addr = base;
57 file = new MemoizedObject() {
58 public Object computeValue() {
59 return COFFFileParser.getParser().parse(new AddressDataSource(addr));
60 }
61 };
62 }
63
64 /** Indicates whether this is really a DLL or actually a .EXE
65 file. */
66 public boolean isDLL() {
67 return getFile().getHeader().hasCharacteristic(Characteristics.IMAGE_FILE_DLL);
68 }
69
70 /** Look up a symbol; returns absolute address or null if symbol was
71 not found. */
72 public Address lookupSymbol(String symbol) throws COFFException {
73 if (!isDLL()) {
74 return null;
75 }
76 ExportDirectoryTable exports = getExportDirectoryTable();
77 return lookupSymbol(symbol, exports,
78 0, exports.getNumberOfNamePointers() - 1);
79 }
80
81 public Address getBase() {
82 return addr;
83 }
84
85 /** Returns the full path name of this DLL/EXE, or null if this DLL
86 object was created by parsing the target process's address
87 space. */
88 public String getName() {
89 return fullPathName;
90 }
91
92 public long getSize() {
93 return size;
94 }
95
96 public CDebugInfoDataBase getDebugInfoDataBase() throws DebuggerException {
97 if (db != null) {
98 return db;
99 }
100
101 // Try to parse
102 if (dbg == null) {
103 return null; // Need WindbgDebugger
104 }
105
106 if (Assert.ASSERTS_ENABLED) {
107 Assert.that(fullPathName != null, "Need full path name to build debug info database");
108 }
109
110 db = new WindbgCDebugInfoBuilder(dbg).buildDataBase(fullPathName, addr);
111 return db;
112 }
113
114 public BlockSym debugInfoForPC(Address pc) throws DebuggerException {
115 CDebugInfoDataBase db = getDebugInfoDataBase();
116 if (db == null) {
117 return null;
118 }
119 return db.debugInfoForPC(pc);
120 }
121
122 public ClosestSymbol closestSymbolToPC(Address pcAsAddr) throws DebuggerException {
123 ExportDirectoryTable exports = getExportDirectoryTable();
124 if (exports == null) {
125 return null;
126 }
127 String name = null;
128 long pc = dbg.getAddressValue(pcAsAddr);
129 long diff = Long.MAX_VALUE;
130 long base = dbg.getAddressValue(addr);
131 for (int i = 0; i < exports.getNumberOfNamePointers(); i++) {
132 if (!exports.isExportAddressForwarder(exports.getExportOrdinal(i))) {
133 long tmp = base + (exports.getExportAddress(exports.getExportOrdinal(i)) & 0xFFFFFFFF);
134 if ((tmp <= pc) && ((pc - tmp) < diff)) {
135 diff = pc - tmp;
136 name = exports.getExportName(i);
137 }
138 }
139 }
140 if (name == null) {
141 return null;
142 }
143 return new ClosestSymbol(name, diff);
144 }
145
146 public LineNumberInfo lineNumberForPC(Address pc) throws DebuggerException {
147 CDebugInfoDataBase db = getDebugInfoDataBase();
148 if (db == null) {
149 return null;
150 }
151 return db.lineNumberForPC(pc);
152 }
153
154 public void close() {
155 getFile().close();
156 file = null;
157 }
158
159 //----------------------------------------------------------------------
160 // Internals only below this point
161 //
162
163 private COFFFile getFile() {
164 return (COFFFile) file.getValue();
165 }
166
167 private Address lookupSymbol(String symbol, ExportDirectoryTable exports,
168 int loIdx, int hiIdx) {
169 do {
170 int curIdx = ((loIdx + hiIdx) >> 1);
171 String cur = exports.getExportName(curIdx);
172 if (symbol.equals(cur)) {
173 return addr.addOffsetTo(
174 ((long) exports.getExportAddress(exports.getExportOrdinal(curIdx))) & 0xFFFFFFFFL
175 );
176 }
177 if (symbol.compareTo(cur) < 0) {
178 if (hiIdx == curIdx) {
179 hiIdx = curIdx - 1;
180 } else {
181 hiIdx = curIdx;
182 }
183 } else {
184 if (loIdx == curIdx) {
185 loIdx = curIdx + 1;
186 } else {
187 loIdx = curIdx;
188 }
189 }
190 } while (loIdx <= hiIdx);
191
192 return null;
193 }
194
195 private ExportDirectoryTable getExportDirectoryTable() {
196 return
197 getFile().getHeader().getOptionalHeader().getDataDirectories().getExportDirectoryTable();
198 }
199
200 private WindbgDebugger dbg;
201 private String fullPathName;
202 private long size;
203 // MemoizedObject contains a COFFFile
204 private MemoizedObject file;
205 // Base address of module in target process
206 private Address addr;
207 // Debug info database for this DLL
208 private CDebugInfoDataBase db;
209 }