101 lines
3.2 KiB
Java
101 lines
3.2 KiB
Java
/*
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* Copyright (c) 2019, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8216302
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* @summary Check that stack trace contains proper strings even with class caching
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* @modules java.base/java.lang:open
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* @compile StackTraceClassCache.java
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* @run main StackTraceClassCache
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*/
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import java.lang.reflect.*;
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public class StackTraceClassCache {
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public static void main(String... args) throws Exception {
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Outer.Inner o = new Outer().new Inner();
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Class cl = o.getClass();
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// Check out of the box class name
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try {
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o.work();
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} catch (Exception e) {
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checkException(e, 42);
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}
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// Clear and populate class caches via getName
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clearNameCache(cl);
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cl.getName();
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try {
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o.work();
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} catch (Exception e) {
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checkException(e, 51);
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}
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// Clear and populate class caches via stack trace
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clearNameCache(cl);
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try {
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o.work();
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} catch (Exception e) {
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checkException(e, 59);
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}
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}
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static void checkException(Exception e, int line) throws Exception {
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StackTraceElement[] fs = e.getStackTrace();
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if (fs.length < 2) {
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throw new IllegalStateException("Exception should have at least two frames", e);
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}
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assertCorrect("StackTraceClassCache$Outer$Inner.work(StackTraceClassCache.java:95)", fs[0].toString(), e);
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assertCorrect("StackTraceClassCache.main(StackTraceClassCache.java:" + line + ")", fs[1].toString(), e);
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}
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static void assertCorrect(String expected, String actual, Exception e) throws Exception {
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if (!expected.equals(actual)) {
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throw new IllegalStateException("Expected: " + expected + "; Actual: " + actual, e);
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}
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}
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static void clearNameCache(Class cl) {
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try {
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Field f = Class.class.getDeclaredField("name");
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f.setAccessible(true);
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f.set(cl, null);
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} catch (Exception e) {
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throw new IllegalStateException(e);
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}
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}
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static class Outer {
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class Inner {
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void work() throws Exception {
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throw new Exception("Sample exception");
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}
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}
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}
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}
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