Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/bugspot/StackTraceEntry.java @ 3779:04760e41b01e
7016112: CMS: crash during promotion testing
Summary: Also reviewed by mikael.gerdin@oracle.com; stdlib:qsort() does byte-by-byte swapping on Windows. This leads to pointer shearing. Fix is to implement a quicksort that does full pointer updates.
Reviewed-by: never, coleenp, ysr
author | brutisso |
---|---|
date | Tue, 28 Jun 2011 14:23:27 +0200 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2001, 2002, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ package sun.jvm.hotspot.bugspot; import sun.jvm.hotspot.debugger.cdbg.*; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.runtime.*; /** This class describes a frame in a stack trace. It abstracts over C/C++ and Java frames. */ public class StackTraceEntry { private CFrame cFrame; private CDebugger dbg; private JavaVFrame javaFrame; private String value; // What is displayed in a stack trace // For merging C and Java stack traces. // For more precise stack traces, should probably have a way to // convert a CFrame to a sun.jvm.hotspot.runtime.Frame. For now, // doing similar algorithm to jdbx (which does not have intimate // knowledge of the VM). private boolean isUnknownCFrame; public StackTraceEntry(CFrame cFrame, CDebugger dbg) { this.cFrame = cFrame; this.dbg = dbg; computeValue(); } public StackTraceEntry(JavaVFrame javaFrame) { this.javaFrame = javaFrame; computeValue(); } public boolean isCFrame() { return (cFrame != null); } public boolean isJavaFrame() { return (javaFrame != null); } public CFrame getCFrame() { return cFrame; } public JavaVFrame getJavaFrame() { return javaFrame; } public boolean isUnknownCFrame() { return isUnknownCFrame; } public String toString() { return value; } private void computeValue() { isUnknownCFrame = true; value = "<unknown>"; if (cFrame != null) { PCFinder.Info info = PCFinder.findPC(cFrame.pc(), cFrame.loadObjectForPC(), dbg); if (info.getName() != null) { value = "(C) " + info.getName(); isUnknownCFrame = false; if (info.getConfidence() == PCFinder.LOW_CONFIDENCE) { value = value + " (?)"; } if (info.getOffset() >= 0) { value = value + " + 0x" + Long.toHexString(info.getOffset()); } } } else if (javaFrame != null) { isUnknownCFrame = false; Method m = javaFrame.getMethod(); value = "(J) " + m.externalNameAndSignature(); } } }