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1 /*
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2 * Copyright 2001-2002 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.bugspot;
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26
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27 import sun.jvm.hotspot.debugger.cdbg.*;
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28 import sun.jvm.hotspot.oops.*;
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29 import sun.jvm.hotspot.runtime.*;
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30
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31 /** This class describes a frame in a stack trace. It abstracts over
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32 C/C++ and Java frames. */
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33
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34 public class StackTraceEntry {
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35 private CFrame cFrame;
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36 private CDebugger dbg;
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37 private JavaVFrame javaFrame;
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38 private String value; // What is displayed in a stack trace
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39 // For merging C and Java stack traces.
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40 // For more precise stack traces, should probably have a way to
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41 // convert a CFrame to a sun.jvm.hotspot.runtime.Frame. For now,
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42 // doing similar algorithm to jdbx (which does not have intimate
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43 // knowledge of the VM).
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44 private boolean isUnknownCFrame;
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45
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46 public StackTraceEntry(CFrame cFrame, CDebugger dbg) {
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47 this.cFrame = cFrame;
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48 this.dbg = dbg;
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49 computeValue();
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50 }
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51
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52 public StackTraceEntry(JavaVFrame javaFrame) {
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53 this.javaFrame = javaFrame;
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54 computeValue();
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55 }
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56
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57 public boolean isCFrame() { return (cFrame != null); }
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58 public boolean isJavaFrame() { return (javaFrame != null); }
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59 public CFrame getCFrame() { return cFrame; }
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60 public JavaVFrame getJavaFrame() { return javaFrame; }
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61 public boolean isUnknownCFrame() { return isUnknownCFrame; }
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62 public String toString() {
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63 return value;
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64 }
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65
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66 private void computeValue() {
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67 isUnknownCFrame = true;
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68 value = "<unknown>";
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69 if (cFrame != null) {
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70 PCFinder.Info info = PCFinder.findPC(cFrame.pc(), cFrame.loadObjectForPC(), dbg);
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71 if (info.getName() != null) {
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72 value = "(C) " + info.getName();
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73 isUnknownCFrame = false;
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74 if (info.getConfidence() == PCFinder.LOW_CONFIDENCE) {
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75 value = value + " (?)";
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76 }
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77 if (info.getOffset() >= 0) {
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78 value = value + " + 0x" + Long.toHexString(info.getOffset());
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79 }
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80 }
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81 } else if (javaFrame != null) {
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82 isUnknownCFrame = false;
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83 Method m = javaFrame.getMethod();
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84 value = "(J) " + m.externalNameAndSignature();
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85 }
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86 }
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87 }
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