/*

 * Copyright (c) 2016, 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

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 * questions.

 */

/*

 * @test

 * @bug 8157892 8157977

 * @summary Verify file name, line number and bci of native methods

 * @run main NativeMethod

 */

import java.lang.StackWalker.Option;

import java.lang.StackWalker.StackFrame;

import java.lang.reflect.Method;

import java.util.List;

import java.util.stream.Collectors;

public class NativeMethod {

    public static void main(String... args) throws Exception {

        new NativeMethod().test();

    }

    private final StackWalker walker;

    NativeMethod() {

        this.walker = StackWalker.getInstance(Option.SHOW_REFLECT_FRAMES);

    }

    void test() throws Exception {

        // invoke via reflection that includes native methods

        Method m = NativeMethod.class.getDeclaredMethod("walk");

        m.invoke(this);

    }

    void walk() {

        List<StackFrame> nativeFrames = walker.walk(s ->

            s.filter(StackFrame::isNativeMethod)

             .collect(Collectors.toList())

        );

        assertTrue(nativeFrames.size() > 0, "native frame not found");

        for (StackFrame f : nativeFrames) {

            assertTrue(f.getFileName() != null, "source file expected to be found");

            assertTrue(f.getLineNumber() < 0, "line number expected to be unavailable");

            assertTrue(f.getByteCodeIndex() < 0, "bci expected to be unavailable");

        }

    }

    private static void assertTrue(boolean value, String msg) {

        if (value != true)

            throw new AssertionError(msg);

    }

}