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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 *

 * 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.

 *

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package org.graalvm.compiler.hotspot.test;

import static org.junit.Assert.assertNotEquals;

import org.graalvm.compiler.api.directives.GraalDirectives;

import org.graalvm.compiler.graph.Node;

import org.graalvm.compiler.hotspot.nodes.KlassBeingInitializedCheckNode;

import org.graalvm.compiler.nodes.DeoptimizeNode;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.java.LoadFieldNode;

import org.graalvm.compiler.nodes.java.NewInstanceNode;

import org.junit.Assert;

import org.junit.Assume;

import org.junit.Before;

import org.junit.Test;

import jdk.vm.ci.code.InstalledCode;

import jdk.vm.ci.code.InvalidInstalledCodeException;

import jdk.vm.ci.meta.DeoptimizationReason;

import jdk.vm.ci.meta.ResolvedJavaMethod;

public class HotSpotClassInitializationTest extends HotSpotGraalCompilerTest {

    static HotSpotClassInitializationTest instance;

    static class InvokeStatic {

        static {

            instance.test(InvokeStatic.class, "m");

        }

        static boolean m() {

            double value = 123;

            doOtherWork(value);

            return GraalDirectives.inCompiledCode();

        }

        static double doOtherWork(double value) {

            return value;

        }

        static int field;

    }

    static class GetStatic {

        static class Inner {

            static int N = 5000;

            static {

                instance.test(GetStatic.class, "m", LoadFieldNode.class);

            }

        }

        static {

            @SuppressWarnings("unused")

            int n = Inner.N;

        }

        @SuppressWarnings("unused")

        static boolean m() {

            double value = 123 * Inner.N;

            return GraalDirectives.inCompiledCode();

        }

        static double field;

    }

    static class NewInstance {

        static {

            instance.test(NewInstance.class, "m", NewInstanceNode.class);

        }

        @SuppressWarnings("unused")

        static boolean m() {

            Object o = new NewInstance();

            return GraalDirectives.inCompiledCode();

        }

        static double field;

    }

    @Before

    public void checkAssumptions() {

        // cannot be BeforeClass because we need a runtime and BeforeClass must be static

        Assume.assumeTrue("init_thread field must be visible", runtime().getVMConfig().instanceKlassInitThreadOffset != -1);

    }

    @SafeVarargs

    final void test(Class<?> testClass, String methodName, Class<? extends Node>... nodeTypes) {

        ResolvedJavaMethod method = getResolvedJavaMethod(testClass, methodName);

        StructuredGraph graph = parseProfiled(method, StructuredGraph.AllowAssumptions.NO);

        for (DeoptimizeNode d : graph.getNodes().filter(DeoptimizeNode.class)) {

            assertNotEquals("No unresolved deopts expected", d.getReason(), DeoptimizationReason.Unresolved);

        }

        assertTrue("A dynamic check should have been emitted", graph.getNodes().filter(KlassBeingInitializedCheckNode.class).count() == 1);

        // Ensure that all expected nodes exist.

        for (Class<? extends Node> nodeType : nodeTypes) {

            assertTrue("expected node of type " + nodeType, graph.getNodes().filter(nodeType).count() == 1);

        }

        // Ensure that execution remains in the compiled code to the return point

        InstalledCode code = instance.getCode(method, graph);

        try {

            boolean result = (boolean) code.executeVarargs();

            Assert.assertEquals("should have completed in compiled code", result, true);

        } catch (InvalidInstalledCodeException e) {

            e.printStackTrace();

        }

    }

    @Test

    public void testInvokeStatic() {

        GraalDirectives.inCompiledCode();

        instance = this;

        InvokeStatic.field = 0;

        instance = null;

    }

    @Test

    public void testGetStatic() {

        GraalDirectives.inCompiledCode();

        instance = this;

        GetStatic.field = 0;

        instance = null;

    }

    @Test

    public void testNewInstance() {

        GraalDirectives.inCompiledCode();

        instance = this;

        NewInstance.field = 0;

        instance = null;

    }

}