jdk

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/*
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 * Copyright (c) 2020, 2021, Oracle and/or its affiliates. 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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 * @summary Test that stack tracing isn't broken if an exception is thrown
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 *          in a hidden class.
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 * DESCRIPTION
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 *     An exception is thrown by a hidden class.  Verify that the exception's
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 *     stack trace contains the name of the current test class (i.e., verify
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 *     that the stack trace is not broken).
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 * @library /test/lib
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 * @modules jdk.compiler
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 * @run main HiddenClassStack
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 */
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import java.io.ByteArrayOutputStream;
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import java.io.PrintStream;
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import java.lang.invoke.MethodType;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodHandles.Lookup;
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import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*;
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import jdk.test.lib.compiler.InMemoryJavaCompiler;
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public class HiddenClassStack {
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    static byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass",
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        "public class TestClass { " +
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        "    public TestClass() { " +
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        "        throw new RuntimeException(\"boom\"); " +
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        " } } ");
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    public static void main(String[] args) throws Throwable {
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        // An exception is thrown by class loaded by lookup.defineHiddenClass().
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        // Verify that the exception's stack trace contains name of the current
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        // test class.
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        try {
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            Lookup lookup = MethodHandles.lookup();
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            Class<?> cl = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass();
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            Object obj = cl.newInstance();
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            throw new Exception("Expected RuntimeException not thrown");
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        } catch (RuntimeException e) {
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            if (!e.getMessage().contains("boom")) {
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                throw new RuntimeException("Wrong RuntimeException, e: " + e.toString());
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            }
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            ByteArrayOutputStream byteOS = new ByteArrayOutputStream();
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            PrintStream printStream = new PrintStream(byteOS);
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            e.printStackTrace(printStream);
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            printStream.close();
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            String stackTrace = byteOS.toString("ASCII");
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            if (!stackTrace.contains(HiddenClassStack.class.getName())) {
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                throw new RuntimeException("HiddenClassStack missing from stacktrace: " +
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                                           stackTrace);
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            }
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        }
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    }
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}
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