/*

 * Copyright (c) 2013, 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 IsMethodCompilableTest

 * @bug 8007270 8006683 8007288 8022832

 * @library /testlibrary /testlibrary/whitebox

 * @build IsMethodCompilableTest

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 * @run main/othervm/timeout=2400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,TestCase$Helper::* IsMethodCompilableTest

 * @summary testing of WB::isMethodCompilable()

 * @author igor.ignatyev@oracle.com

 */

public class IsMethodCompilableTest extends CompilerWhiteBoxTest {

    /**

     * Value of {@code -XX:PerMethodRecompilationCutoff}

     */

    protected static final long PER_METHOD_RECOMPILATION_CUTOFF;

    static {

        long tmp = Long.parseLong(

                getVMOption("PerMethodRecompilationCutoff", "400"));

        if (tmp == -1) {

            PER_METHOD_RECOMPILATION_CUTOFF = -1 /* Inf */;

        } else {

            PER_METHOD_RECOMPILATION_CUTOFF = 1 + (0xFFFFFFFFL & tmp);

        }

    }

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

        for (TestCase test : TestCase.values()) {

            new IsMethodCompilableTest(test).runTest();

        }

    }

    public IsMethodCompilableTest(TestCase testCase) {

        super(testCase);

        // to prevent inlining of #method

        WHITE_BOX.testSetDontInlineMethod(method, true);

    }

    /**

     * Tests {@code WB::isMethodCompilable()} by recompilation of tested method

     * 'PerMethodRecompilationCutoff' times and checks compilation status. Also

     * checks that WB::clearMethodState() clears no-compilable flags.

     *

     * @throws Exception if one of the checks fails.

     */

    @Override

    protected void test() throws Exception {

        if (testCase.isOsr && CompilerWhiteBoxTest.MODE.startsWith(

                "compiled ")) {

          System.err.printf("Warning: %s is not applicable in %s%n",

                testCase.name(), CompilerWhiteBoxTest.MODE);

          return;

        }

        if (!isCompilable()) {

            throw new RuntimeException(method + " must be compilable");

        }

        System.out.println("PerMethodRecompilationCutoff = "

                + PER_METHOD_RECOMPILATION_CUTOFF);

        if (PER_METHOD_RECOMPILATION_CUTOFF == -1) {

            System.err.println(

                    "Warning: test is not applicable if PerMethodRecompilationCutoff == Inf");

            return;

        }

        // deoptimize 'PerMethodRecompilationCutoff' times and clear state

        for (long i = 0L, n = PER_METHOD_RECOMPILATION_CUTOFF - 1; i < n; ++i) {

            compileAndDeoptimize();

        }

        if (!testCase.isOsr && !isCompilable()) {

            // in osr test case count of deopt maybe more than iterations

            throw new RuntimeException(method + " is not compilable after "

                    + (PER_METHOD_RECOMPILATION_CUTOFF - 1) + " iterations");

        }

        WHITE_BOX.clearMethodState(method);

        // deoptimize 'PerMethodRecompilationCutoff' + 1 times

        long i;

        for (i = 0L; i < PER_METHOD_RECOMPILATION_CUTOFF

                && isCompilable(); ++i) {

            compileAndDeoptimize();

        }

        if (!testCase.isOsr && i != PER_METHOD_RECOMPILATION_CUTOFF) {

            // in osr test case count of deopt maybe more than iterations

            throw new RuntimeException(method + " is not compilable after "

                    + i + " iterations, but must only after "

                    + PER_METHOD_RECOMPILATION_CUTOFF);

        }

        if (isCompilable()) {

            throw new RuntimeException(method + " is still compilable after "

                    + PER_METHOD_RECOMPILATION_CUTOFF + " iterations");

        }

        compile();

        checkNotCompiled();

        // WB.clearMethodState() must reset no-compilable flags

        WHITE_BOX.clearMethodState(method);

        if (!isCompilable()) {

            throw new RuntimeException(method

                    + " is not compilable after clearMethodState()");

        }

        compile();

        checkCompiled();

    }

    private void compileAndDeoptimize() throws Exception {

        compile();

        waitBackgroundCompilation();

        deoptimize();

    }

}