1/*
2 * Copyright (c) 2014, 2016, 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 * @test TestArrayAllocatorMallocLimit
26 * @summary Sanity check that the ArrayAllocatorMallocLimit flag can be set.
27 * The test helps verifying that size_t flags can be set/read.
28 * @bug 8054823
29 * @key gc
30 * @library /test/lib
31 * @modules java.base/jdk.internal.misc
32 *          java.management
33 * @run driver TestArrayAllocatorMallocLimit
34 */
35
36import jdk.test.lib.Asserts;
37import jdk.test.lib.process.OutputAnalyzer;
38import jdk.test.lib.process.ProcessTools;
39import java.math.BigInteger;
40
41public class TestArrayAllocatorMallocLimit {
42  public static void main(String [] args) throws Exception {
43    testDefaultValue();
44    testSetValue();
45  }
46
47  private static final String flagName = "ArrayAllocatorMallocLimit";
48
49  //     size_t ArrayAllocatorMallocLimit                 = 18446744073709551615{experimental}
50  private static final String printFlagsFinalPattern = " *size_t *" + flagName + " *:?= *(\\d+) *\\{experimental\\} *";
51
52  public static void testDefaultValue()  throws Exception {
53    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
54      "-XX:+UnlockExperimentalVMOptions", "-XX:+PrintFlagsFinal", "-version");
55
56    OutputAnalyzer output = new OutputAnalyzer(pb.start());
57    String value = output.firstMatch(printFlagsFinalPattern, 1);
58
59    try {
60      Asserts.assertNotNull(value, "Couldn't find size_t flag " + flagName);
61
62      // A size_t is not always parseable with Long.parseValue,
63      // use BigInteger instead.
64      BigInteger biValue = new BigInteger(value);
65
66      // Sanity check that we got a non-zero value.
67      Asserts.assertNotEquals(biValue, "0");
68
69      output.shouldHaveExitValue(0);
70    } catch (Exception e) {
71      System.err.println(output.getOutput());
72      throw e;
73    }
74  }
75
76  public static void testSetValue() throws Exception {
77    long flagValue = 2048;
78
79    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
80      "-XX:+UnlockExperimentalVMOptions", "-XX:" + flagName + "=" + flagValue, "-XX:+PrintFlagsFinal", "-version");
81
82    OutputAnalyzer output = new OutputAnalyzer(pb.start());
83    String value = output.firstMatch(printFlagsFinalPattern, 1);
84
85    try {
86      Asserts.assertNotNull("Couldn't find size_t flag " + flagName);
87
88      long longValue = Long.parseLong(value);
89
90      Asserts.assertEquals(longValue, flagValue);
91
92      output.shouldHaveExitValue(0);
93    } catch (Exception e) {
94      System.err.println(output.getOutput());
95      throw e;
96    }
97  }
98
99}
100