| /* |
| * Copyright (c) 2004, 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.scenarios.contention.TC04; |
| |
| import java.io.PrintStream; |
| |
| import nsk.share.*; |
| import nsk.share.jvmti.*; |
| |
| public class tc04t001 extends DebugeeClass { |
| |
| final static int THREADS_LIMIT = 2; |
| |
| // run test from command line |
| public static void main(String argv[]) { |
| argv = nsk.share.jvmti.JVMTITest.commonInit(argv); |
| |
| // JCK-compatible exit |
| System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE); |
| } |
| |
| // run test from JCK-compatible environment |
| public static int run(String argv[], PrintStream out) { |
| return new tc04t001().runIt(argv, out); |
| } |
| |
| /* =================================================================== */ |
| |
| // scaffold objects |
| ArgumentHandler argHandler = null; |
| Log log = null; |
| int status = Consts.TEST_PASSED; |
| long timeout = 0; |
| |
| // run debuggee |
| public int runIt(String argv[], PrintStream out) { |
| argHandler = new ArgumentHandler(argv); |
| log = new Log(out, argHandler); |
| timeout = argHandler.getWaitTime() * 60 * 1000; |
| log.display("Timeout = " + timeout + " msc."); |
| |
| tc04t001Thread threads[] = new tc04t001Thread[THREADS_LIMIT]; |
| status = checkStatus(status); |
| for (int i = 0; i < THREADS_LIMIT; i++) { |
| threads[i] = new tc04t001Thread(i); |
| threads[i].start(); |
| } |
| |
| try { |
| for (int i = 0; i < THREADS_LIMIT; i++) { |
| threads[i].join(timeout/THREADS_LIMIT); |
| } |
| } catch (InterruptedException e) { |
| throw new Failure(e); |
| } |
| |
| status = checkStatus(status); |
| |
| log.display("Debugee finished, value: " + tc04t001Thread.value); |
| if (tc04t001Thread.value != |
| THREADS_LIMIT*tc04t001Thread.INCREMENT_LIMIT) { |
| log.complain("Wrong value: " + tc04t001Thread.value + |
| ", expected: " + THREADS_LIMIT*tc04t001Thread.INCREMENT_LIMIT); |
| status = Consts.TEST_FAILED; |
| } |
| |
| /* DEBUG -- to check if the threads taking turns in right order |
| boolean race = false; |
| for (int i = 1; i < 2*tc04t001Thread.INCREMENT_LIMIT; i++) { |
| if (tc04t001Thread.passOrder[i] == tc04t001Thread.passOrder[i-1]) { |
| race = true; |
| System.out.println("Race condition in the test:"); |
| System.out.println("passOrder[" + (i-1) + "]:" |
| + tc04t001Thread.passOrder[i-1]); |
| System.out.println("passOrder[" + (i) + "]:" |
| + tc04t001Thread.passOrder[i]); |
| } |
| } |
| if (race) |
| System.out.println("There was a race condition in the test."); |
| */ |
| |
| return status; |
| } |
| } |
| |
| /* =================================================================== */ |
| |
| class tc04t001Thread extends Thread { |
| |
| final static int INCREMENT_LIMIT = 100; |
| final static int DELAY = 1000; |
| |
| static volatile int value = 0; |
| |
| static Flicker flicker = new Flicker(); |
| /* DEBUG -- to check if the threads taking turns in right order |
| static volatile int iter = 0; |
| static volatile int passOrder[] = |
| new int[INCREMENT_LIMIT*tc04t001.THREADS_LIMIT]; |
| */ |
| |
| private int id; |
| |
| public tc04t001Thread(int i) { |
| super("Debuggee Thread " + i); |
| id = i; |
| } |
| |
| public synchronized void run() { |
| for (int i = 0; i < INCREMENT_LIMIT; i++) { |
| flicker.waitFor(id); |
| increment(id); |
| try { |
| wait(1); |
| } catch (InterruptedException e) {} |
| } |
| } |
| |
| static synchronized void increment(int i) { |
| /* DEBUG -- to check if the threads taking turns in right order |
| passOrder[iter++] = i; |
| */ |
| flicker.unlock(i); |
| int temp = value; |
| for (int j = 0; j < DELAY; j++) ; |
| try { |
| sleep(500); |
| } catch (InterruptedException e) {} |
| value = temp + 1; |
| } |
| } |
| |
| class Flicker { |
| |
| private int owner = -1; |
| |
| public synchronized void waitFor(int owner) { |
| while (this.owner == owner) { |
| try { |
| wait(); |
| } catch (InterruptedException e) {} |
| } |
| } |
| |
| public synchronized void unlock(int owner) { |
| if (this.owner == owner) |
| throw new IllegalStateException("the same owner: " + owner); |
| |
| this.owner = owner; |
| notifyAll(); |
| } |
| } |