| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8150778 |
| * @summary Test exception depths, and code to get stack traces |
| * @library /testlibrary |
| * @run main/othervm -XX:MaxJavaStackTraceDepth=1024 TestThrowable |
| */ |
| |
| import java.lang.reflect.Field; |
| import jdk.test.lib.Asserts; |
| |
| public class TestThrowable { |
| |
| // Inner class that throws a lot of exceptions |
| static class Thrower { |
| static int MaxJavaStackTraceDepth = 1024; // as above |
| int[] depths = {10, 34, 100, 1024, 2042}; |
| int count = 0; |
| |
| int getDepth(Throwable t) throws Exception { |
| Field f = Throwable.class.getDeclaredField("depth"); |
| f.setAccessible(true); // it's private |
| return f.getInt(t); |
| } |
| |
| void callThrow(int depth) { |
| if (++count < depth) { |
| callThrow(depth); |
| } else { |
| throw new RuntimeException("depth tested " + depth); |
| } |
| } |
| void testThrow() throws Exception { |
| for (int d : depths) { |
| try { |
| count = getDepth(new Throwable()); |
| callThrow(d); |
| } catch(Exception e) { |
| e.getStackTrace(); |
| System.out.println(e.getMessage()); |
| int throwableDepth = getDepth(e); |
| Asserts.assertTrue(throwableDepth == d || |
| (d > MaxJavaStackTraceDepth && throwableDepth == MaxJavaStackTraceDepth), |
| "depth should return the correct value: depth tested=" + |
| d + " throwableDepth=" + throwableDepth); |
| } |
| } |
| } |
| } |
| |
| public static void main(String... unused) throws Exception { |
| Thrower t = new Thrower(); |
| t.testThrow(); |
| } |
| } |