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 package test.java.lang.StackWalker;
32 
33 import java.lang.StackWalker.Option;
34 import java.lang.StackWalker.StackFrame;
35 import java.lang.reflect.Method;
36 import java.util.List;
37 import java.util.stream.Collectors;
38 import org.testng.annotations.Test;
39 
40 public class NativeMethod {
main(String... args)41     public static void main(String... args) throws Exception {
42         new NativeMethod().test();
43     }
44 
45     private final StackWalker walker;
NativeMethod()46     NativeMethod() {
47         this.walker = StackWalker.getInstance(Option.SHOW_REFLECT_FRAMES);
48     }
49 
50     // Android-changed: Add @Test annotation.
51     @Test
test()52     public void test() throws Exception {
53         // invoke via reflection that includes native methods
54         Method m = NativeMethod.class.getDeclaredMethod("walk");
55         m.invoke(this);
56     }
57 
walk()58     void walk() {
59         List<StackFrame> nativeFrames = walker.walk(s ->
60             s.filter(StackFrame::isNativeMethod)
61              .collect(Collectors.toList())
62         );
63 
64         assertTrue(nativeFrames.size() > 0, "native frame not found");
65         for (StackFrame f : nativeFrames) {
66             assertTrue(f.getFileName() != null, "source file expected to be found");
67             assertTrue(f.getLineNumber() < 0, "line number expected to be unavailable");
68             assertTrue(f.getByteCodeIndex() < 0, "bci expected to be unavailable");
69         }
70 
71     }
72 
73     private static void assertTrue(boolean value, String msg) {
74         if (value != true)
75             throw new AssertionError(msg);
76     }
77 }
78