--- a/test/hotspot/jtreg/runtime/handshake/HandshakeWalkSuspendExitTest.java Tue Mar 26 08:57:28 2019 -0400
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,93 +0,0 @@
-/*
- * Copyright (c) 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.
- *
- */
-
-/*
- * @test HandshakeWalkSuspendExitTest
- * @summary This test tries to stress the handshakes with new and exiting threads while suspending them.
- * @library /testlibrary /test/lib
- * @build HandshakeWalkSuspendExitTest
- * @run driver ClassFileInstaller sun.hotspot.WhiteBox
- * sun.hotspot.WhiteBox$WhiteBoxPermission
- * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI HandshakeWalkSuspendExitTest
- */
-
-import jdk.test.lib.Asserts;
-import sun.hotspot.WhiteBox;
-
-public class HandshakeWalkSuspendExitTest implements Runnable {
-
- static final int _test_threads = 8;
- static final int _test_exit_threads = 128;
- static Thread[] _threads = new Thread[_test_threads];
- static volatile boolean exit_now = false;
- static java.util.concurrent.Semaphore _sem = new java.util.concurrent.Semaphore(0);
-
- @Override
- public void run() {
- WhiteBox wb = WhiteBox.getWhiteBox();
- while (!exit_now) {
- _sem.release();
- // We only suspend threads on even index and not ourself.
- // Otherwise we can accidentially suspend all threads.
- for (int i = 0; i < _threads.length; i += 2) {
- wb.handshakeWalkStack(null /* ignored */, true /* stackwalk all threads */);
- if (Thread.currentThread() != _threads[i]) {
- _threads[i].suspend();
- _threads[i].resume();
- }
- }
- for (int i = 0; i < _threads.length; i += 2) {
- wb.handshakeWalkStack(_threads[i] /* thread to stackwalk */, false /* stackwalk one thread */);
- if (Thread.currentThread() != _threads[i]) {
- _threads[i].suspend();
- _threads[i].resume();
- }
- }
- }
- }
-
- public static void main(String... args) throws Exception {
- HandshakeWalkSuspendExitTest test = new HandshakeWalkSuspendExitTest();
-
- for (int i = 0; i < _threads.length; i++) {
- _threads[i] = new Thread(test);
- _threads[i].start();
- }
- for (int i = 0; i < _test_threads; i++) {
- _sem.acquire();
- }
- Thread[] exit_threads = new Thread[_test_exit_threads];
- for (int i = 0; i < _test_exit_threads; i++) {
- exit_threads[i] = new Thread(new Runnable() { public void run() {} });
- exit_threads[i].start();
- }
- exit_now = true;
- for (int i = 0; i < _threads.length; i++) {
- _threads[i].join();
- }
- for (int i = 0; i < exit_threads.length; i++) {
- exit_threads[i].join();
- }
- }
-}