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.Platform;
40 import jdk.test.lib.process.OutputAnalyzer;
41 import jdk.test.lib.process.ProcessTools;
42 import jdk.test.lib.Utils;
43 import java.util.Random;
44 
45 public class StartupOutput {
46     public static void main(String[] args) throws Exception {
47         ProcessBuilder pb;
48         OutputAnalyzer out;
49         Random rand = Utils.getRandomInstance();
50 
51         pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xint", "-XX:+DisplayVMOutputToStdout", "-version");
52         out = new OutputAnalyzer(pb.start());
53         out.shouldNotContain("no space to run compilers");
54         out.shouldHaveExitValue(0);
55 
56         pb = ProcessTools.createLimitedTestJavaProcessBuilder("-Xint", "-XX:ReservedCodeCacheSize=1770K", "-XX:InitialCodeCacheSize=4K", "-version");
57         out = new OutputAnalyzer(pb.start());
58         // The VM should not crash but may return an error message because we don't have enough space for adapters
59         int exitCode = out.getExitValue();
60         if (exitCode != 1 && exitCode != 0) {
61             throw new Exception("VM crashed with exit code " + exitCode);
62         }
63 
64         // On s390x, generated code is ~6x larger in fastdebug and ~1.4x in release builds vs. other archs,
65         // hence we require slightly more minimum space.
66         int minInitialSize = 2000 + (Platform.isS390x() ? 800 : 0);
67         for (int i = 0; i < 50; i++) {
68             int initialCodeCacheSizeInKb = minInitialSize + rand.nextInt(400);
69             int reservedCodeCacheSizeInKb = initialCodeCacheSizeInKb + rand.nextInt(200);
70             pb = ProcessTools.createLimitedTestJavaProcessBuilder("-XX:InitialCodeCacheSize=" + initialCodeCacheSizeInKb + "K", "-XX:ReservedCodeCacheSize=" + reservedCodeCacheSizeInKb + "k", "-version");
71             out = new OutputAnalyzer(pb.start());
72             exitCode = out.getExitValue();
73             if (exitCode != 1 && exitCode != 0) {
74                 throw new Exception("VM crashed with exit code " + exitCode);
75             }
76             // The VM should not crash but will probably fail with a "CodeCache is full. Compiler has been disabled." message
77             out.stdoutShouldNotContain("# A fatal error");
78         }
79     }
80 }