116 lines
3.8 KiB
Java
116 lines
3.8 KiB
Java
/*
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* Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @summary Verifies JVMTI support for Continuations
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* @requires vm.continuations
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* @compile ContStackDepthTest.java
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* @modules java.base/jdk.internal.vm
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* @run main/othervm/native -agentlib:ContStackDepthTest ContStackDepthTest
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*/
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import java.math.BigInteger;
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import java.math.BigInteger.*;
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import jdk.internal.vm.Continuation;
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import jdk.internal.vm.ContinuationScope;
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public class ContStackDepthTest {
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private static final String agentLib = "ContStackDepthTest";
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private static ContinuationScope scope = new ContinuationScope("Fibonacci") {};
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private static Continuation cont;
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private static BigInteger value = BigInteger.ONE;
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private static boolean done = false;
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static void log(String str) { System.out.println(str); }
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static native void enableEvents(Thread thread);
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static native boolean check();
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public static void main(String[] args) throws Exception {
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try {
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System.loadLibrary(agentLib);
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} catch (UnsatisfiedLinkError ex) {
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log("Failed to load " + agentLib + " lib");
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log("java.library.path: " + System.getProperty("java.library.path"));
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throw ex;
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}
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log("\n###### main: started #####\n");
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enableEvents(Thread.currentThread());
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ContStackDepthTest obj = new ContStackDepthTest();
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obj.runTest();
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if (!check()) {
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throw new RuntimeException(
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"ContStackDepthTest failed: miscounted FramePop, MethodEnter or MethodExit events!");
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}
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log("ContStackDepthTest passed\n");
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log("\n##### main: finished #####\n");
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}
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public void runTest() {
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log("\n#### runTest: started ####\n");
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fibTest();
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log("\n#### runTest: finished ####\n");
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}
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static final Runnable FIB = () -> {
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Continuation.yield(scope);
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var cur = value;
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var next = BigInteger.ONE;
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int iter = 0;
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while (true) {
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log("\n ## FIB iteration: " + (++iter) + " ##\n");
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if (done) return;
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value = next;
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Continuation.yield(scope);
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var tmp = cur.add(next);
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cur = next;
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next = tmp;
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}
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};
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public static void fibTest() {
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cont = new Continuation(scope, FIB);
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log("\n#### fibTest: started ####\n");
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System.out.println("getNextFib returned value: " + getNextFib());
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System.out.println("getNextFib returned value: " + getNextFib());
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System.out.println("getNextFib returned value: " + getNextFib());
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done = true;
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System.out.println("getNextFib returned value: " + getNextFib());
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log("\n#### fibTest: finished ####\n");
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}
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public static BigInteger getNextFib() {
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cont.run();
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return value;
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}
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}
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