1 /*
 2  * Copyright (c) 2013, 2025, 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
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22  */
23 
24 /*
25  * @test
26  * @key randomness
27  * @bug 8026949 8164091
28  * @summary Test ensures correct VM output during startup
29  * @library /test/lib
30  * @requires vm.flagless
31  * @modules java.base/jdk.internal.misc
32  *          java.management
33  *
34  * @run driver compiler.startup.StartupOutput
35  */
36 
37 package compiler.startup;
38 
39 import jdk.test.lib.process.OutputAnalyzer;
40 import jdk.test.lib.process.ProcessTools;
41 import jdk.test.lib.Utils;
42 import java.util.Random;
43 
44 public class StartupOutput {
45     public static void main(String[] args) throws Exception {
46         ProcessBuilder pb;
47         OutputAnalyzer out;
48         Random rand = Utils.getRandomInstance();
49 
50         pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xint", "-XX:+DisplayVMOutputToStdout", "-version");
51         out = new OutputAnalyzer(pb.start());
52         out.shouldNotContain("no space to run compilers");
53         out.shouldHaveExitValue(0);
54 
55         pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xint", "-XX:ReservedCodeCacheSize=1770K", "-XX:InitialCodeCacheSize=4K", "-version");
56         out = new OutputAnalyzer(pb.start());
57         // The VM should not crash but may return an error message because we don't have enough space for adapters
58         int exitCode = out.getExitValue();
59         if (exitCode != 1 && exitCode != 0) {
60             throw new Exception("VM crashed with exit code " + exitCode);
61         }
62 
63         Process[] pr = new Process[200];
64         for (int i = 0; i < 200; i++) {
65             int initialCodeCacheSizeInKb = 800 + rand.nextInt(400);
66             int reservedCodeCacheSizeInKb = initialCodeCacheSizeInKb + rand.nextInt(200);
67             pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:InitialCodeCacheSize=" + initialCodeCacheSizeInKb + "K", "-XX:ReservedCodeCacheSize=" + reservedCodeCacheSizeInKb + "k", "-version");
68             pr[i] = pb.start();
69         }
70         for (int i = 0; i < 200; i++) {
71             out = new OutputAnalyzer(pr[i]);
72             // The VM should not crash but will probably fail with a "CodeCache is full. Compiler has been disabled." message
73             out.stdoutShouldNotContain("# A fatal error");
74             exitCode = out.getExitValue();
75             if (exitCode != 1 && exitCode != 0) {
76                 throw new Exception("VM crashed with exit code " + exitCode);
77             }
78         }
79     }
80 }