/*

 * Copyright (c) 2013, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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 jdk.jfr.event.compiler;

import static jdk.test.lib.Asserts.assertFalse;

import java.lang.reflect.Method;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.Utils;

import jdk.test.lib.jfr.EventNames;

import jdk.test.lib.jfr.Events;

import sun.hotspot.WhiteBox;

 * @test

 * @key jfr

 * @requires vm.compMode!="Xint"

 * @library /test/lib

 * @build sun.hotspot.WhiteBox

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *     sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -Xbootclasspath/a:.

 *     -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

 *     jdk.jfr.event.compiler.TestCompilerCompile

 */

public class TestCompilerCompile {

    private final static String EVENT_NAME = EventNames.Compilation;

    private final static String METHOD_NAME = "dummyMethod";

    private boolean foundKnownMethod = false;

    private boolean foundOsrMethod = false;

    public static void main(String[] args) throws Throwable {

        TestCompilerCompile test = new TestCompilerCompile();

        test.doTest();

    }

    static void dummyMethod() {

        System.out.println("hello!");

    }

    public void doTest() throws Throwable {

        Recording recording = new Recording();

        recording.enable(EVENT_NAME);

        recording.start();

        long start = System.currentTimeMillis();

        // provoke OSR compilation

        for (int i = 0; i < Integer.MAX_VALUE; i++) {

        }

        // compile dummyMethod()

        Method mtd = TestCompilerCompile.class.getDeclaredMethod(METHOD_NAME, new Class[0]);

        WhiteBox WB = WhiteBox.getWhiteBox();

        String directive = "[{ match: \"" + TestCompilerCompile.class.getName().replace('.', '/')

                + "." + METHOD_NAME + "\", " + "BackgroundCompilation: false }]";

        WB.addCompilerDirective(directive);

        if (!WB.enqueueMethodForCompilation(mtd, 4 /* CompLevel_full_optimization */)) {

            WB.enqueueMethodForCompilation(mtd, 1 /* CompLevel_simple */);

        }

        Utils.waitForCondition(() -> WB.isMethodCompiled(mtd));

        dummyMethod();

        System.out.println("time:" + (System.currentTimeMillis() - start));

        recording.stop();

        Set<Integer> compileIds = new HashSet<Integer>();

        List<RecordedEvent> events = Events.fromRecording(recording);

        Events.hasEvents(events);

        for (RecordedEvent event : events) {

            System.out.println("Event:" + event);

            verifyEvent(event);

            Integer compileId = Events.assertField(event, "compileId").getValue();

            assertFalse(compileIds.contains(compileId), "compile id not unique: " + compileId);

            compileIds.add(compileId);

        }

        // Verify that we actually encountered our expected method

        if (!foundKnownMethod) {

            throw new Exception("Couldn't find method jdk/jfr/event/compiler/TestCompilerCompile.dummyMethod()V among compilation events");

        }

        // Verify that doTest() function has been replaced on stack.

        if (!foundOsrMethod) {

            throw new Exception("No On Stack Replacement of function doTest()");

        }

    }

    private void verifyEvent(RecordedEvent event) throws Throwable {

        Events.assertJavaMethod(event);

        Events.assertEventThread(event);

        String methodName = Events.assertField(event, "method.name").notEmpty().getValue();

        String methodDescriptor = Events.assertField(event, "method.descriptor").notEmpty().getValue();

        String methodType = Events.assertField(event, "method.type.name").notEmpty().getValue();

        // Compare with a known candidate

        if ("jdk/jfr/event/compiler/TestCompilerCompile".equals(methodType) && "dummyMethod".equals(methodName) && "()V".equals(methodDescriptor)) {

            foundKnownMethod = true;

        }

        // The doTest() function is live almost the entire time the test runs.

        // We should get at least 1 "on stack replacement" for that method.

        if (TestCompilerCompile.class.getName().replace('.', '/').equals(methodType) && "doTest".equals(methodName)) {

            boolean isOsr = Events.assertField(event, "isOsr").getValue();

            if (isOsr) {

                foundOsrMethod = true;

            }

        }

        Events.assertField(event, "compileId").atLeast(0);

        Events.assertField(event, "compileLevel").atLeast((short) 0).atMost((short) 4);

        Events.assertField(event, "inlinedBytes").atLeast(0L);

        Events.assertField(event, "codeSize").atLeast(0L);

        Events.assertField(event, "isOsr");

    }

}