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