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view agent/src/share/classes/sun/jvm/hotspot/tools/JInfo.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 | 55fb97c4c58d |
children | 4ca6dc0799b6 |
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/* * Copyright (c) 2004, 2013, 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.tools; import sun.jvm.hotspot.debugger.JVMDebugger; import sun.jvm.hotspot.runtime.Arguments; import sun.jvm.hotspot.runtime.VM; public class JInfo extends Tool { public JInfo() { super(); } public JInfo(int m) { mode = m; } public JInfo(JVMDebugger d) { super(d); } protected boolean needsJavaPrefix() { return false; } public String getName() { return "jinfo"; } protected void printFlagsUsage() { System.out.println(" -flags\tto print VM flags"); System.out.println(" -sysprops\tto print Java System properties"); System.out.println(" <no option>\tto print both of the above"); super.printFlagsUsage(); } public static final int MODE_FLAGS = 0; public static final int MODE_SYSPROPS = 1; public static final int MODE_BOTH = 2; public void run() { Tool tool = null; switch (mode) { case MODE_FLAGS: printVMFlags(); return; case MODE_SYSPROPS: tool = new SysPropsDumper(); break; case MODE_BOTH: { tool = new Tool() { public void run() { Tool sysProps = new SysPropsDumper(); sysProps.setAgent(getAgent()); System.out.println("Java System Properties:"); System.out.println(); sysProps.run(); System.out.println(); System.out.println("VM Flags:"); printVMFlags(); System.out.println(); } }; } break; default: usage(); break; } tool.setAgent(getAgent()); tool.run(); } public static void main(String[] args) { int mode = -1; switch (args.length) { case 1: if (args[0].charAt(0) == '-') { // -h or -help or some invalid flag new JInfo(mode).usage(); } else { mode = MODE_BOTH; } break; case 2: case 3: { String modeFlag = args[0]; if (modeFlag.equals("-flags")) { mode = MODE_FLAGS; } else if (modeFlag.equals("-sysprops")) { mode = MODE_SYSPROPS; } else if (modeFlag.charAt(0) == '-') { // -h or -help or some invalid flag new JInfo(mode).usage(); } else { mode = MODE_BOTH; } if (mode != MODE_BOTH) { // we have to consume first flag argument. String[] newArgs = new String[args.length - 1]; for (int i = 0; i < newArgs.length; i++) { newArgs[i] = args[i + 1]; } args = newArgs; } break; } default: new JInfo(mode).usage(); } JInfo jinfo = new JInfo(mode); jinfo.execute(args); } private void printVMFlags() { VM.Flag[] flags = VM.getVM().getCommandLineFlags(); System.out.print("Non-default VM flags: "); for (VM.Flag flag : flags) { if (flag.getOrigin() == 0) { // only print flags which aren't their defaults continue; } if (flag.isBool()) { String onoff = flag.getBool() ? "+" : "-"; System.out.print("-XX:" + onoff + flag.getName() + " "); } else { System.out.print("-XX:" + flag.getName() + "=" + flag.getValue() + " "); } } System.out.println(); System.out.print("Command line: "); String str = Arguments.getJVMFlags(); if (str != null) { System.out.print(str + " "); } str = Arguments.getJVMArgs(); if (str != null) { System.out.print(str); } System.out.println(); } private int mode; }