--- /dev/null 2019-05-31 08:55:27.000000000 -0700 +++ new/test/hotspot/jtreg/compiler/whitebox/OSRFailureLevel4Test.java 2019-05-31 08:55:26.000000000 -0700 @@ -0,0 +1,99 @@ +/* + * Copyright (c) 2019, 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 OSRFailureLevel4Test + * @summary check that not compilable OSR level 4 results in falling back to level 1 + * @library /test/lib / + * @modules java.base/jdk.internal.misc + * java.management + * @build sun.hotspot.WhiteBox + * @run driver ClassFileInstaller sun.hotspot.WhiteBox + * sun.hotspot.WhiteBox$WhiteBoxPermission + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions + * -XX:+WhiteBoxAPI -XX:+TieredCompilation compiler.whitebox.OSRFailureLevel4Test + */ + +package compiler.whitebox; + +import sun.hotspot.WhiteBox; +import java.lang.reflect.Executable; +import java.lang.reflect.Method; + +public class OSRFailureLevel4Test extends Thread { + private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); + private static final long BACKEDGE_THRESHOLD = 150000; + private Method method; + + public static void main(String[] args) throws Exception { + OSRFailureLevel4Test test = new OSRFailureLevel4Test(); + test.test(); + } + + /** + * Triggers two different OSR compilations for the same method and + * checks if WhiteBox.deoptimizeMethod() deoptimizes both. + * + * @throws Exception + */ + public void test() throws Exception { + method = OSRFailureLevel4Test.class.getDeclaredMethod("run"); + WHITE_BOX.makeMethodNotCompilable(method, 4, true); + + Thread t = new OSRFailureLevel4Test(); + t.setDaemon(true); + t.start(); + + int currentLevel = 0; + int loops = 0; + while (true) { + int level = WHITE_BOX.getMethodCompilationLevel(method, true); + if (level == 1) { + System.err.println("success"); + running = false; + return; + } + if (level == currentLevel) { + Thread.sleep(1000); + loops++; + if (loops > 100) { + running = false; + throw new AssertionError("Never reached level 1"); + } + continue; + } + currentLevel = level; + System.err.println("Current level = " + currentLevel); + } + + } + + static volatile int counter = 0; + static boolean running = true; + + public void run() { + while (running) { + counter++; + } + } +}