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view agent/src/share/classes/sun/jvm/hotspot/utilities/PointerLocation.java @ 17716:cdb71841f4bc
6498581: ThreadInterruptTest3 produces wrong output on Windows
Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
author | minqi |
---|---|
date | Wed, 26 Feb 2014 15:20:41 -0800 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 2000, 2012, 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; // 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)); } public boolean isInNewGen() { return ((gen != null) && (gen.level() == 0)); } public boolean isInOldGen() { return ((gen != null) && (gen.level() == 1)); } public boolean inOtherGen() { return (!isInNewGen() && !isInOldGen()); } /** Only valid if isInHeap() */ public Generation getGeneration() { return gen; } /** 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 (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"); } } }