Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/utilities/PointerLocation.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 | 3e8fbc61cee8 |
children | da91efe96a93 |
line wrap: on
line source
/* * Copyright (c) 2000, 2010, 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.utilities; import java.io.*; import sun.jvm.hotspot.code.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.gc_interface.*; import sun.jvm.hotspot.interpreter.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.memory.*; /** This class attempts to describe possible locations of pointers in the VM. */ public class PointerLocation { ////////////////////////////////////////////////////////////////// // // // These are package private to simplify the implementation and // // interaction with PointerFinder // // // ////////////////////////////////////////////////////////////////// Address addr; CollectedHeap heap; Generation gen; Generation permGen; // If UseTLAB was enabled and the pointer was found in a // currently-active TLAB, these will be set boolean inTLAB; JavaThread tlabThread; ThreadLocalAllocBuffer tlab; // Generated code locations boolean inInterpreter; boolean inCodeCache; // FIXME: add other locations like VTableStubs, StubRoutines, maybe // even "on thread x's stack" InterpreterCodelet interpreterCodelet; CodeBlob blob; // FIXME: add more detail about CodeBlob boolean inBlobCode; boolean inBlobData; boolean inBlobOops; boolean inBlobUnknownLocation; boolean inStrongGlobalJNIHandleBlock; boolean inWeakGlobalJNIHandleBlock; boolean inLocalJNIHandleBlock; JNIHandleBlock handleBlock; sun.jvm.hotspot.runtime.Thread handleThread; public PointerLocation(Address addr) { this.addr = addr; } public boolean isInHeap() { return (heap != null || (gen != null) || (permGen != null)); } public boolean isInNewGen() { return ((gen != null) && (gen.level() == 0)); } public boolean isInOldGen() { return ((gen != null) && (gen.level() == 1)); } public boolean isInPermGen() { return (permGen != null); } public boolean inOtherGen() { return (!isInNewGen() && !isInOldGen() && !isInPermGen()); } /** Only valid if isInHeap() */ public Generation getGeneration() { if (gen != null) { return gen; } else { return permGen; } } /** This may be true if isInNewGen is also true */ public boolean isInTLAB() { return inTLAB; } /** Only valid if isInTLAB() returns true */ public JavaThread getTLABThread() { return tlabThread; } /** Only valid if isInTLAB() returns true */ public ThreadLocalAllocBuffer getTLAB() { return tlab; } public boolean isInInterpreter() { return inInterpreter; } /** For now, only valid if isInInterpreter is true */ public InterpreterCodelet getInterpreterCodelet() { return interpreterCodelet; } public boolean isInCodeCache() { return inCodeCache; } /** For now, only valid if isInCodeCache is true */ public CodeBlob getCodeBlob() { return blob; } public boolean isInBlobCode() { return inBlobCode; } public boolean isInBlobData() { return inBlobData; } public boolean isInBlobOops() { return inBlobOops; } public boolean isInBlobUnknownLocation() { return inBlobUnknownLocation; } public boolean isInStrongGlobalJNIHandleBlock() { return inStrongGlobalJNIHandleBlock; } public boolean isInWeakGlobalJNIHandleBlock() { return inWeakGlobalJNIHandleBlock; } public boolean isInLocalJNIHandleBlock() { return inLocalJNIHandleBlock; } /** Only valid if isInStrongGlobalJNIHandleBlock, isInWeakGlobalJNIHandleBlock, or isInLocalJNIHandleBlock is true */ public JNIHandleBlock getJNIHandleBlock() { return handleBlock; } /** Only valid if isInLocalJNIHandleBlock is true */ public sun.jvm.hotspot.runtime.Thread getJNIHandleThread() { return handleThread; } public boolean isUnknown() { return (!(isInHeap() || isInInterpreter() || isInCodeCache() || isInStrongGlobalJNIHandleBlock() || isInWeakGlobalJNIHandleBlock() || isInLocalJNIHandleBlock())); } public String toString() { ByteArrayOutputStream bos = new ByteArrayOutputStream(); printOn(new PrintStream(bos)); return bos.toString(); } public void print() { printOn(System.out); } public void printOn(PrintStream tty) { tty.print("Address "); if (addr == null) { tty.print("0x0"); } else { tty.print(addr.toString()); } tty.print(": "); if (isInHeap()) { if (isInTLAB()) { tty.print("In thread-local allocation buffer for thread \"" + getTLABThread().getThreadName() + "\" ("); getTLABThread().printThreadIDOn(tty); tty.print(") "); getTLAB().printOn(tty); } else { if (isInNewGen()) { tty.print("In new generation "); } else if (isInOldGen()) { tty.print("In old generation "); } else if (isInPermGen()) { tty.print("In perm generation "); } else if (gen != null) { tty.print("In Generation " + getGeneration().level()); } else { tty.print("In unknown section of Java heap"); } if (getGeneration() != null) { getGeneration().printOn(tty); } } } else if (isInInterpreter()) { tty.println("In interpreter codelet \"" + interpreterCodelet.getDescription() + "\""); interpreterCodelet.printOn(tty); } else if (isInCodeCache()) { CodeBlob b = getCodeBlob(); tty.print("In "); if (isInBlobCode()) { tty.print("code"); } else if (isInBlobData()) { tty.print("data"); } else if (isInBlobOops()) { tty.print("oops"); } else { if (Assert.ASSERTS_ENABLED) { Assert.that(isInBlobUnknownLocation(), "Should have known location in CodeBlob"); } tty.print("unknown location"); } tty.print(" in "); b.printOn(tty); // FIXME: add more detail } else if (isInStrongGlobalJNIHandleBlock() || isInWeakGlobalJNIHandleBlock() || isInLocalJNIHandleBlock()) { tty.print("In "); if (isInStrongGlobalJNIHandleBlock()) { tty.print("strong global"); } else if (isInWeakGlobalJNIHandleBlock()) { tty.print("weak global"); } else { tty.print("thread-local"); } tty.print(" JNI handle block (" + handleBlock.top() + " handle slots present)"); if (isInLocalJNIHandleBlock()) { if (handleThread.isJavaThread()) { tty.print(" for JavaThread "); ((JavaThread) handleThread).printThreadIDOn(tty); } else { tty.print("for a non-Java Thread"); } } } else { // This must be last if (Assert.ASSERTS_ENABLED) { Assert.that(isUnknown(), "Should have unknown location"); } tty.print("In unknown location"); } } }