1 /*
2 * Copyright (c) 2022, 2024, 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 Loading CDS archived heap objects into ParallelGC
26 * @bug 8274788
27 * @requires vm.cds
28 * @requires vm.gc.Parallel
29 * @requires vm.gc.G1
30 *
31 * @comment don't run this test if any -XX::+Use???GC options are specified, since they will
32 * interfere with the test.
33 * @requires vm.gc == null
34 *
35 * @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds
36 * @compile test-classes/Hello.java
37 * @run driver TestParallelGCWithCDS
38 */
39
40 import jdk.test.lib.Platform;
41 import jdk.test.lib.process.OutputAnalyzer;
42
43 public class TestParallelGCWithCDS {
44 public final static String HELLO = "Hello World";
45 static String helloJar;
46
47 public static void main(String... args) throws Exception {
48 helloJar = JarBuilder.build("hello", "Hello");
49
50 // Check if we can use ParallelGC during dump time, or run time, or both.
51 test(false, true);
52 test(true, false);
53 test(true, true);
54
55 // With G1 we usually have 2 heap regions. To increase test coverage, we can have 3 heap regions
56 // by using "-Xmx256m -XX:ObjectAlignmentInBytes=64"
57 if (Platform.is64bit()) test(false, true, true);
58 }
59
60 final static String G1 = "-XX:+UseG1GC";
61 final static String Parallel = "-XX:+UseParallelGC";
62
63 static void test(boolean dumpWithParallel, boolean execWithParallel) throws Exception {
64 test(dumpWithParallel, execWithParallel, false);
65 }
66
67 static void test(boolean dumpWithParallel, boolean execWithParallel, boolean useSmallRegions) throws Exception {
68 String dumpGC = dumpWithParallel ? Parallel : G1;
69 String execGC = execWithParallel ? Parallel : G1;
70 String small1 = useSmallRegions ? "-Xmx256m" : "-showversion";
71 String small2 = useSmallRegions ? "-XX:ObjectAlignmentInBytes=64" : "-showversion";
72 OutputAnalyzer out;
73
74 System.out.println("0. Dump with " + dumpGC);
75 out = TestCommon.dump(helloJar,
76 new String[] {"Hello"},
77 dumpGC,
78 small1,
79 small2,
80 "-Xlog:cds");
81 out.shouldContain("Dumping shared data to file:");
82 out.shouldHaveExitValue(0);
83
84 System.out.println("1. Exec with " + execGC);
85 out = TestCommon.exec(helloJar,
86 execGC,
87 small1,
88 small2,
89 "-Xlog:cds",
90 "Hello");
91 out.shouldContain(HELLO);
92 out.shouldHaveExitValue(0);
93
94 int n = 2;
95 if (!dumpWithParallel && execWithParallel) {
96 // We dumped with G1, so we have an archived heap. At exec time, try to load them into
97 // a small ParallelGC heap that may be too small.
98 String[] sizes = {
99 "4m", // usually this will success load the archived heap
100 "2m", // usually this will fail to load the archived heap, but app can launch
101 // or fail with "GC triggered before VM initialization completed"
102 "1m" // usually this will cause VM launch to fail with "Too small maximum heap"
103 };
104 for (String sz : sizes) {
105 String xmx = "-Xmx" + sz;
106 System.out.println("=======\n" + n + ". Exec with " + execGC + " " + xmx);
107 out = TestCommon.exec(helloJar,
108 execGC,
109 small1,
110 small2,
111 xmx,
112 "-Xlog:cds",
113 "Hello");
114 if (out.getExitValue() == 0) {
115 out.shouldContain(HELLO);
116 } else {
117 String pattern = "((Too small maximum heap)" +
118 "|(GC triggered before VM initialization completed)" +
119 "|(Initial heap size set to a larger value than the maximum heap size)" +
120 "|(CDS archive has aot-linked classes but the archived heap objects cannot be loaded)" +
121 "|(java.lang.OutOfMemoryError)" +
122 "|(Error: A JNI error has occurred, please check your installation and try again))";
123 out.shouldMatch(pattern);
124 out.shouldNotHaveFatalError();
125 }
126 n++;
127 }
128 }
129 }
130 }