1 /*

     2  * Copyright (c) 2017, 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 /* @test

    25  * @bug 8193222

    26  * @summary Check EnsureLocalCapacity doesn't shrink unexpectedly

    27  * @library /test/lib

    28  * @run main/othervm/native TestCheckedEnsureLocalCapacity launch

    29  */

    30 import jdk.test.lib.process.ProcessTools;

    31 import jdk.test.lib.process.OutputAnalyzer;

    32 

    33 public class TestCheckedEnsureLocalCapacity {

    34 

    35     static {

    36         System.loadLibrary("TestCheckedEnsureLocalCapacity");

    37     }

    38 

    39     // Calls EnsureLocalCapacity(capacity) and then creates "copies" number

    40     // of LocalRefs to "o".

    41     // If capacity > copies no warning should ensue (with the bug fixed).

    42     // If copies > capacity + warning-threshold then we still get a warning.

    43     private static native void ensureCapacity(Object o, int capacity, int copies);

    44 

    45     private static int[][] testArgs = {

    46         { 60, 45 }, // good: capacity > copies

    47         { 1, 45 }   // bad: copies >> capacity

    48     };

    49 

    50     private static final String EXCEED_WARNING =

    51         "^WARNING: JNI local refs: \\d++, exceeds capacity:";

    52 

    53     private static final String WARNING = "^WARNING: ";

    54 

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

    56         if (args.length == 2) {

    57             ensureCapacity(new Object(),

    58                            Integer.parseInt(args[0]),

    59                            Integer.parseInt(args[1]));

    60             return;

    61         }

    62 

    63         // No warning

    64         ProcessTools.executeTestJvm("-Xcheck:jni",

    65                                     "TestCheckedEnsureLocalCapacity",

    66                                     Integer.toString(testArgs[0][0]),

    67                                     Integer.toString(testArgs[0][1])).

    68             shouldHaveExitValue(0).

    69             // check no capacity warning

    70             stdoutShouldNotMatch(EXCEED_WARNING).

    71             // check no other warning

    72             stdoutShouldNotMatch(WARNING).

    73             reportDiagnosticSummary();

    74 

    75         // Warning

    76         ProcessTools.executeTestJvm("-Xcheck:jni",

    77                                     "TestCheckedEnsureLocalCapacity",

    78                                     Integer.toString(testArgs[1][0]),

    79                                     Integer.toString(testArgs[1][1])).

    80             shouldHaveExitValue(0).

    81             // check for capacity warning

    82             stdoutShouldMatch(EXCEED_WARNING).

    83             reportDiagnosticSummary();

    84     }

    85 }