RFR: 8344821: Test CheckDefaultArchiveFile.java fails if classes_coh.jsa is not present [v2]

[Calvin Cheung]

On Tue, 26 Nov 2024 06:32:41 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> There are also other test cases that call `Platform.isDefaultCDSArchiveSupported()`. I think these probably need to be cleaned up / removed (in separate RFE?)
> 
> ```
> ./lib-test/jdk/test/lib/TestMutuallyExclusivePlatformPredicates.java:                "areCustomLoadersSupportedForCDS", "isDefaultCDSArchiveSupported",
> ./jdk/tools/jlink/plugins/CDSPluginTest.java:        if (!Platform.isDefaultCDSArchiveSupported())
> ./hotspot/jtreg/runtime/cds/CheckSharingWithDefaultArchive.java:        if (!Platform.isDefaultCDSArchiveSupported()) {
> ./hotspot/jtreg/runtime/cds/CheckDefaultArchiveFile.java:            if (Platform.isDefaultCDSArchiveSupported()) {
> ./hotspot/jtreg/runtime/cds/CheckDefaultArchiveFile.java:            if (Platform.isDefaultCDSArchiveSupported()) {
> ./hotspot/jtreg/serviceability/jvmti/RedefineClasses/RedefineSharedClass.java:        if (!Platform.isDefaultCDSArchiveSupported()) {
> ./lib/jdk/test/lib/Platform.java:    public static boolean isDefaultCDSArchiveSupported() {
> ```

Other than CheckDefaultArchiveFile.java, the other tests seem to be running fine so far. Will file bug if the other tests start failing.

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PR Comment: https://git.openjdk.org/jdk/pull/22374#issuecomment-2501506994