| /* |
| * Copyright (c) 2003, 2018, 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 nsk.jvmti.GetCurrentContendedMonitor; |
| |
| import nsk.share.Wicket; |
| import java.io.PrintStream; |
| |
| public class contmon001 { |
| |
| native static void checkMon(int point, Thread thr, Object mon); |
| native static int getRes(); |
| |
| static { |
| try { |
| System.loadLibrary("contmon001"); |
| } catch (UnsatisfiedLinkError ule) { |
| System.err.println("Could not load contmon001 library"); |
| System.err.println("java.library.path:" |
| + System.getProperty("java.library.path")); |
| throw ule; |
| } |
| } |
| |
| public static Wicket startingBarrier; |
| public static Wicket waitingBarrier; |
| static Object lockFld = new Object(); |
| |
| static boolean DEBUG_MODE = false; |
| static PrintStream out; |
| |
| public static void main(String[] args) { |
| args = nsk.share.jvmti.JVMTITest.commonInit(args); |
| |
| System.exit(run(args, System.out) + 95/*STATUS_TEMP*/); |
| } |
| |
| public static int run(String argv[], PrintStream ref) { |
| out = ref; |
| for (int i = 0; i < argv.length; i++) { |
| if (argv[i].equals("-v")) // verbose mode |
| DEBUG_MODE = true; |
| } |
| |
| Object lock = new Object(); |
| Thread currThr = Thread.currentThread(); |
| |
| if (DEBUG_MODE) |
| out.println("\nCheck #1: verifying a contended monitor of current thread \"" |
| + currThr.getName() + "\" ..."); |
| synchronized (lock) { |
| checkMon(1, currThr, null); |
| } |
| if (DEBUG_MODE) |
| out.println("Check #1 done"); |
| |
| contmon001a thr = new contmon001a(); |
| startingBarrier = new Wicket(); |
| waitingBarrier = new Wicket(); |
| |
| thr.start(); |
| if (DEBUG_MODE) |
| out.println("\nWaiting for auxiliary thread ..."); |
| startingBarrier.waitFor(); |
| if (DEBUG_MODE) |
| out.println("Auxiliary thread is ready"); |
| |
| if (DEBUG_MODE) |
| out.println("\nCheck #3: verifying a contended monitor of auxiliary thread ..."); |
| checkMon(3, thr, null); |
| if (DEBUG_MODE) |
| out.println("Check #3 done"); |
| |
| thr.letItGo(); |
| |
| waitingBarrier.waitFor(); |
| synchronized (lockFld) { |
| if (DEBUG_MODE) |
| out.println("\nMain thread entered lockFld's monitor" |
| + "\n\tand calling lockFld.notifyAll() to awake auxiliary thread"); |
| lockFld.notifyAll(); |
| if (DEBUG_MODE) |
| out.println("\nCheck #4: verifying a contended monitor of auxiliary thread ..."); |
| checkMon(4, thr, lockFld); |
| if (DEBUG_MODE) |
| out.println("Check #4 done"); |
| } |
| |
| if (DEBUG_MODE) |
| out.println("\nMain thread released lockFld's monitor" |
| + "\n\tand waiting for auxiliary thread death ..."); |
| |
| try { |
| thr.join(); |
| } catch (InterruptedException e) { |
| throw new Error("Unexpected " + e); |
| } |
| if (DEBUG_MODE) |
| out.println("\nCheck #5: verifying a contended monitor of dead auxiliary thread ..."); |
| checkMon(5, thr, null); |
| if (DEBUG_MODE) |
| out.println("Check #5 done"); |
| |
| return getRes(); |
| } |
| } |
| |
| |
| class contmon001a extends Thread { |
| private volatile boolean flag = true; |
| |
| public void run() { |
| if (contmon001.DEBUG_MODE) |
| contmon001.out.println("check #2: verifying a contended monitor of current auxiliary thread ..."); |
| contmon001.checkMon(2, currentThread(), null); |
| if (contmon001.DEBUG_MODE) |
| contmon001.out.println("check #2 done"); |
| |
| if (contmon001.DEBUG_MODE) |
| contmon001.out.println("notifying main thread"); |
| contmon001.startingBarrier.unlock(); |
| |
| if (contmon001.DEBUG_MODE) |
| contmon001.out.println("thread is going to loop while <flag> is true ..."); |
| int i = 0; |
| int n = 1000; |
| while (flag) { |
| if (n <= 0) { |
| n = 1000; |
| } |
| if (i > n) { |
| i = 0; |
| n--; |
| } |
| i++; |
| } |
| if (contmon001.DEBUG_MODE) |
| contmon001.out.println("looping is done: <flag> is false"); |
| |
| synchronized (contmon001.lockFld) { |
| contmon001.waitingBarrier.unlock(); |
| if (contmon001.DEBUG_MODE) |
| contmon001.out.println("\nthread entered lockFld's monitor" |
| + "\n\tand releasing it through the lockFld.wait() call"); |
| try { |
| contmon001.lockFld.wait(); |
| } catch (InterruptedException e) { |
| throw new Error("Unexpected " + e); |
| } |
| } |
| |
| if (contmon001.DEBUG_MODE) |
| contmon001.out.println("thread exiting"); |
| } |
| |
| public void letItGo() { |
| flag = false; |
| } |
| } |