1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 /* 26 * @test HandshakeWalkExitTest 27 * @library /testlibrary /test/lib 28 * @build HandshakeWalkExitTest 29 * @run main ClassFileInstaller sun.hotspot.WhiteBox 30 * sun.hotspot.WhiteBox$WhiteBoxPermission 31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI HandshakeWalkExitTest 32 */ 33 34 import jdk.test.lib.Asserts; 35 import sun.hotspot.WhiteBox; 36 37 public class HandshakeWalkExitTest implements Runnable { 38 39 @Override 40 public void run() { 41 } 42 43 static volatile boolean exit_now = false; 44 static Thread[] threads; 45 46 public static void main(String... args) throws Exception { 47 int testRuns = 100; 48 int testThreads = 500; 49 50 HandshakeWalkExitTest test = new HandshakeWalkExitTest(); 51 52 threads = new Thread[64]; 53 54 Runnable hser = new Runnable(){ 55 public void run(){ 56 WhiteBox wb = WhiteBox.getWhiteBox(); 57 while(!exit_now) { 58 wb.handshakeWalkStack(null, true); 59 try { Thread.sleep(1); } catch(Exception e) {} 60 } 61 } 62 }; 63 Thread hst = new Thread(hser); 64 hst.start(); 65 for (int k = 0; k<testRuns ; k++) { 66 Thread[] threads = new Thread[testThreads]; 67 for (int i = 0; i<threads.length ; i++) { 68 threads[i] = new Thread(test); 69 threads[i].start(); 70 } 71 } 72 exit_now = true; 73 hst.join(); 74 } 75 }