/*

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 * 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

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 *

 * 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.

 *

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 */

/*

 * @test TestHeapDumpOnOutOfMemoryError

 * @summary Test verifies that -XX:HeapDumpOnOutOfMemoryError dump heap when OutOfMemory is thrown in heap

 * @library /test/lib

 * @run driver TestHeapDumpOnOutOfMemoryError run heap

 */

import jdk.test.lib.Asserts;

import jdk.test.lib.classloader.GeneratingClassLoader;

import jdk.test.lib.hprof.HprofParser;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

import java.io.File;

public class TestHeapDumpOnOutOfMemoryError {

    public static final String HEAP_OOME = "heap";

    public static final String METASPACE_OOME = "metaspace";

    public static void main(String[] args) throws Exception {

        if (args.length == 1) {

             try {

                if (args[0].equals(HEAP_OOME)) {

                    Object[] oa = new Object[Integer.MAX_VALUE];

                    for(int i = 0; i < oa.length; i++) {

                        oa[i] = new Object[Integer.MAX_VALUE];

                    }

                } else {

                    GeneratingClassLoader loader = new GeneratingClassLoader();

                    for (int i = 0; ; i++) {

                        loader.loadClass(loader.getClassName(i));

                    }

                }

                throw new Error("OOME not triggered");

            } catch (OutOfMemoryError err) {

                return;

            }

        }

        test(args[1]);

    }

    static void test(String type) throws Exception {

        String heapdumpFilename = type + ".hprof";

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+HeapDumpOnOutOfMemoryError",

                "-XX:HeapDumpPath=" + heapdumpFilename, "-XX:MaxMetaspaceSize=64m",

                TestHeapDumpOnOutOfMemoryError.class.getName(), type);

        OutputAnalyzer output = new OutputAnalyzer(pb.start());

        output.stdoutShouldNotBeEmpty();

        output.shouldContain("Dumping heap to " + type + ".hprof");

        File dump = new File(heapdumpFilename);

        Asserts.assertTrue(dump.exists() && dump.isFile(),

                "Could not find dump file " + dump.getAbsolutePath());

        HprofParser.parse(new File(heapdumpFilename));

        System.out.println("PASSED");

    }

}