RFR: 8252412: [macos11] system dynamic libraries removed from filesystem [v2]

[Jiangli Zhou]

On Fri, 22 Jan 2021 20:08:48 GMT, Martin Buchholz <martin at openjdk.org> wrote:

>> src/java.smartcardio/unix/classes/sun/security/smartcardio/PlatformPCSC.java line 132:
>> 
>>> 130:         // existence of the containing directory instead of the file.
>>> 131:         lib = PCSC_FRAMEWORK;
>>> 132:         if (new File(lib).getParentFile().isDirectory()) {
>> 
>> This is outside of my normal area, could you please explain why checking the existence of the containing directory is equivalent to checking the file here? Does it provide the expected behavior on all unix-like platforms or only macos?
>> 
>> Could you please also provide a jtreg test for this change?
>
> The directory structure is intact - only the file is removed from the filesystem.
> More generally, for many frameworks, where there used to be
> 
> 
> the file is gone, but 
> 
> 
> remains.
> 
> I don't think we need a jtreg test, since any functionality associated with PCSC is broken on this platform.  I added label noreg-other

Ok, I see Java_sun_security_smartcardio_PlatformPCSC_initialize does dlopen using the 'jLibName' (string) obtained from getLibraryName() and throws IOException if dlopen fails. The change seems safe enough.

I'm wondering if you want to check the file first then check the parent directory if the file does not exist. Not sure if that's a little more optimal on older macos, so I'll leave that to you to decide.

For the jtreg test, how about converting Dominik's TestPCSC? As the file is a shared for 'unix' platforms, it feels safer at least with some level of unit test. Could you please give some more contexts about the functionalities associated with PCSC are broken on macos?

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PR: https://git.openjdk.java.net/jdk/pull/2119