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
31import java.lang.StackWalker.Option;
32import java.lang.StackWalker.StackFrame;
33import java.lang.reflect.Method;
34import java.util.List;
35import java.util.stream.Collectors;
36
37public 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}
73