1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 

    25 package org.graalvm.compiler.core.test;

    26 

    27 import org.graalvm.compiler.printer.CanonicalStringGraphPrinter;

    28 import org.junit.Test;

    29 

    30 import jdk.vm.ci.meta.JavaConstant;

    31 

    32 /**

    33  * Tests related to graph printing.

    34  */

    35 public class GraphPrinterTest extends GraalCompilerTest {

    36 

    37     /**

    38      * Tests that a self-recursive object does not cause stack overflow when formatted as a string.

    39      */

    40     @Test

    41     public void testGraphPrinterDoesNotStackOverflow() {

    42         CanonicalStringGraphPrinter printer = new CanonicalStringGraphPrinter(getSnippetReflection());

    43         Object[] topArray = {null};

    44         Object[] parent = topArray;

    45         Object[] lastArray = null;

    46         for (int i = 0; i < 5; i++) {

    47             lastArray = new Object[1];

    48             parent[0] = lastArray;

    49             parent = lastArray;

    50         }

    51         lastArray[0] = topArray;

    52         JavaConstant constant = getSnippetReflection().forObject(topArray);

    53         printer.format(constant);

    54     }

    55 }