jdk

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/*
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 * Copyright (c) 2012, 2024, 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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 * @bug 7186925
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 * @summary JavapTask passes null to java.io.Writer
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 * @modules jdk.jdeps/com.sun.tools.javap
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 */
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import javax.tools.*;
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import com.sun.tools.javap.*;
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public class T7186925
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{
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    public static void main(String... args) {
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        new T7186925().run();
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    }
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    void run() {
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        verify("java.lang.Object");
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        if (errors > 0)
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            throw new Error(errors + " found.");
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    }
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    void verify(String className) {
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        try {
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            JavaFileManager fileManager = JavapFileManager.create(null, null);
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            JavaFileObject fo = fileManager.getJavaFileForInput(StandardLocation.PLATFORM_CLASS_PATH, className, JavaFileObject.Kind.CLASS);
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            if (fo == null) {
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                error("Can't find " + className);
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            } else {
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                JavapTask t = new JavapTask(null, fileManager, null);
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                t.handleOptions(new String[] { "-sysinfo", className });
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                JavapTask.ClassFileInfo cfInfo = t.read(fo);
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                try (var in = fo.openInputStream()) {
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                    expectEqual(in.readAllBytes().length, cfInfo.size);
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                }
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            }
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        } catch (NullPointerException ee) {
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            ee.printStackTrace();
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            error("Exception: " + ee);
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        } catch (Exception ee) {
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            System.err.println("Caught exception: " + ee);
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        }
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    }
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    void expectEqual(int found, int expected) {
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        if (found != expected)
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            error("bad value found: " + found + " expected: " + expected);
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    }
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    void error(String msg) {
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        System.err.println(msg);
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        errors++;
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    }
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    int errors;
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}
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