1 /* 2 * Copyright (c) 2002, 2003, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * 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 DLL(WindbgDebugger dbg, String filename, long size, Address relocation)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. */ DLL(Address base)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. */ isDLL()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. */ lookupSymbol(String symbol)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 getBase()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. */ getName()88 public String getName() { 89 return fullPathName; 90 } 91 getSize()92 public long getSize() { 93 return size; 94 } 95 getDebugInfoDataBase()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 debugInfoForPC(Address pc)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 closestSymbolToPC(Address pcAsAddr)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 lineNumberForPC(Address pc)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 close()154 public void close() { 155 getFile().close(); 156 file = null; 157 } 158 159 //---------------------------------------------------------------------- 160 // Internals only below this point 161 // 162 getFile()163 private COFFFile getFile() { 164 return (COFFFile) file.getValue(); 165 } 166 lookupSymbol(String symbol, ExportDirectoryTable exports, int loIdx, int hiIdx)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 getExportDirectoryTable()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 } 210