1 /*

     2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 8157892 8157977

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

    28  * @run main NativeMethod

    29  */

    30 

    31 import java.lang.StackWalker.Option;

    32 import java.lang.StackWalker.StackFrame;

    33 import java.lang.reflect.Method;

    34 import java.util.List;

    35 import java.util.stream.Collectors;

    36 

    37 public class NativeMethod {

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

    39         new NativeMethod().test();

    40     }

    41 

    42     private final StackWalker walker;

    43     NativeMethod() {

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

    45     }

    46 

    47     void test() throws Exception {

    48         // invoke via reflection that includes native methods

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

    50         m.invoke(this);

    51     }

    52 

    53     void walk() {

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

    55             s.filter(StackFrame::isNativeMethod)

    56              .collect(Collectors.toList())

    57         );

    58 

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

    60         for (StackFrame f : nativeFrames) {

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

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

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

    64         }

    65 

    66     }

    67 

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

    69         if (value != true)

    70             throw new AssertionError(msg);

    71     }

    72 }