1 /*
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23 
24 /**
25  * @test CdsDifferentCompactObjectHeaders
26  * @summary Testing CDS (class data sharing) using opposite compact object header settings.
27  *          Using different compact bject headers setting for each dump/load pair.
28  *          This is a negative test; using compact header setting for loading that
29  *          is different from compact headers for creating a CDS file
30  *          should fail when loading.
31  * @requires vm.cds
32  * @requires vm.bits == 64
33  * @library /test/lib
34  * @run driver CdsDifferentCompactObjectHeaders
35  */
36 
37 import jdk.test.lib.cds.CDSTestUtils;
38 import jdk.test.lib.process.OutputAnalyzer;
39 import jdk.test.lib.Platform;
40 
41 public class CdsDifferentCompactObjectHeaders {
42 
43     public static void main(String[] args) throws Exception {
44         createAndLoadSharedArchive(true, false);
45         createAndLoadSharedArchive(false, true);
46     }
47 
48     // Parameters are object alignment expressed in bytes
49     private static void
50     createAndLoadSharedArchive(boolean createCompactHeaders, boolean loadCompactHeaders)
51     throws Exception {
52         String createCompactHeadersArg = "-XX:" + (createCompactHeaders ? "+" : "-") + "UseCompactObjectHeaders";
53         String loadCompactHeadersArg   = "-XX:" + (loadCompactHeaders   ? "+" : "-") + "UseCompactObjectHeaders";
54         String expectedErrorMsg =
55             String.format(
56             "The shared archive file's UseCompactObjectHeaders setting (%s)" +
57             " does not equal the current UseCompactObjectHeaders setting (%s)",
58             createCompactHeaders ? "enabled" : "disabled",
59             loadCompactHeaders   ? "enabled" : "disabled");
60 
61         CDSTestUtils.createArchiveAndCheck("-XX:+UnlockExperimentalVMOptions", createCompactHeadersArg);
62 
63         OutputAnalyzer out = CDSTestUtils.runWithArchive("-Xlog:cds", "-XX:+UnlockExperimentalVMOptions", loadCompactHeadersArg);
64         CDSTestUtils.checkExecExpectError(out, 1, expectedErrorMsg);
65     }
66 }