1 /* 2 * Copyright (c) 2001, 2002, 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, 20 * CA 94065 USA or visit www.oracle.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 }