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1 /*
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2 * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.debugger.cdbg.basic;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28 import sun.jvm.hotspot.debugger.cdbg.*;
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29
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30 /** Basic implementation of the CFrame interface providing some of the
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31 functionality in a platform-independent manner. */
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32
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33 public abstract class BasicCFrame implements CFrame {
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34 private CDebugger dbg;
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35
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36 protected BasicCFrame(CDebugger dbg) {
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37 this.dbg = dbg;
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38 }
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39
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40 protected CDebugger dbg() {
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41 return dbg;
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42 }
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43
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44 public LoadObject loadObjectForPC() {
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45 return dbg.loadObjectContainingPC(pc());
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46 }
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47
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48 public BlockSym blockForPC() {
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49 LoadObject lo = loadObjectForPC();
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50 if (lo == null) {
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51 return null;
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52 }
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53 return lo.debugInfoForPC(pc());
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54 }
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55
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56 public ClosestSymbol closestSymbolToPC() {
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57 LoadObject lo = loadObjectForPC();
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58 if (lo == null) {
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59 return null;
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60 }
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61 return lo.closestSymbolToPC(pc());
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62 }
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63
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64 public void iterateLocals(ObjectVisitor v) {
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65 BlockSym block = blockForPC();
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66 while (block != null) {
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67 for (int i = 0; i < block.getNumLocals(); i++) {
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68 final LocalSym local = block.getLocal(i);
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69 Type t = local.getType();
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70 // t should not be null, but be robust in case of bugs in
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71 // debug info
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72 if (t != null) {
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73 t.iterateObject(localVariableBase().addOffsetTo(local.getFrameOffset()),
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74 v,
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75 new NamedFieldIdentifier() {
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76 public Type getType() {
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77 return local.getType();
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78 }
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79
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80 public String getName() {
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81 return local.getName();
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82 }
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83
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84 public String toString() {
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85 return getName();
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86 }
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87 });
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88 }
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89 }
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90
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91 block = block.getParent();
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92 }
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93 }
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94 }
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