/*

 * 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

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 */

/*

 * @test

 * @bug 8136421

 * @requires vm.jvmci

 * @library /test/lib /

 * @library ../common/patches

 * @modules java.base/jdk.internal.misc

 * @modules java.base/jdk.internal.org.objectweb.asm

 *          java.base/jdk.internal.org.objectweb.asm.tree

 *          jdk.internal.vm.ci/jdk.vm.ci.hotspot

 *          jdk.internal.vm.ci/jdk.vm.ci.code

 *

 * @build jdk.internal.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper

 * @build sun.hotspot.WhiteBox

 *        compiler.jvmci.compilerToVM.DisassembleCodeBlobTest

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox

 *                                sun.hotspot.WhiteBox$WhiteBoxPermission

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

 *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

 *                   -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI

 *                   -XX:-BackgroundCompilation

 *                   compiler.jvmci.compilerToVM.DisassembleCodeBlobTest

 */

package compiler.jvmci.compilerToVM;

import jdk.test.lib.Asserts;

import jdk.test.lib.Utils;

import jdk.vm.ci.code.InstalledCode;

import jdk.vm.ci.hotspot.CompilerToVMHelper;

import sun.hotspot.code.NMethod;

import java.util.List;

public class DisassembleCodeBlobTest {

    public static void main(String[] args) {

        DisassembleCodeBlobTest test

                = new DisassembleCodeBlobTest();

        List<CompileCodeTestCase> testCases

                = CompileCodeTestCase.generate(/* bci = */ -1);

        testCases.forEach(test::check);

        testCases.stream().findAny().ifPresent(test::checkZero);

        test.checkNull();

    }

    private void checkNull() {

        Utils.runAndCheckException(

                NullPointerException.class);

    }

    private void checkZero(CompileCodeTestCase testCase) {

        System.out.println("checkZero for " + testCase);

        testCase.deoptimize();

        InstalledCode installedCode = testCase.toInstalledCode();

        String str = CompilerToVMHelper.disassembleCodeBlob(installedCode);

        Asserts.assertNull(str, testCase

                + " : non-null return value for invalid installCode");

    }

    private void check(CompileCodeTestCase testCase) {

        System.out.println(testCase);

        // to have a clean state

        NMethod nMethod = testCase.deoptimizeAndCompile();

        if (nMethod == null) {

            throw new Error(testCase + " : method is not compiled");

        }

        InstalledCode installedCode = testCase.toInstalledCode();

        String str1 = CompilerToVMHelper.disassembleCodeBlob(installedCode);

        if (str1 != null) {

            Asserts.assertGT(str1.length(), 0,

                   testCase +  " : returned string has to be non-zero length");

        }

        // The very first call to the disassembler contains a string specifying the

        // architecture: [Disassembling for mach='i386:x86-64']

        // Therefore compare strings 2 and 3.

        String str2 = CompilerToVMHelper.disassembleCodeBlob(installedCode);

        String str3 = CompilerToVMHelper.disassembleCodeBlob(installedCode);

        Asserts.assertEQ(str2, str3,

                testCase + " : 3nd invocation returned different value from 2nd");

    }

}