Review request: JDK-6519127 Vista: user.home property not set correctly (original) (raw)

Alexey Utkin alexey.utkin at oracle.com
Tue Jan 22 15:59:40 UTC 2013

Hi Anthony,

The MS back porting process is not trivial. [SHGetKnownFolderPath] could be introduced is service pack for earlier OS. In my opinion that is better to use the function based on fact of present (here the question is more about Shell32.dll version, not OS version but they are in relation).

Alan, that do you think about it?

Regards, -uta

On 22.01.2013 19:45, Anthony Petrov wrote:

Hi Alexey,

The fix looks good from code logic perspective. _I'm only concerned with whether we should use the _try/except magic, or would it rather make sense to define: #define ISWINVISTA (LOBYTE(LOWORD(::GetVersion())) >= 6) and guard the call to SHGetKnownFolderPath() with this check? This seems to be lighter than using the exception handling machinery from performance perspective, and IMO it would make the code cleaner/easier to read. -- best regards, Anthony On 1/22/2013 19:30, Alexey Utkin wrote: On 22.01.2013 16:52, Alan Bateman wrote:

On 22/01/2013 12:28, Alexey Utkin wrote:

To be clear, there are three options for a shell call: 1. Force folder creation if not exists (KFFLAGCREATE) 2. Return existent folder if any (0) 3. Return folder name without verification (KFFLAGDONTVERIFY)

Current implementation is close to the last option (without verification). That is our choice for the fix? (My choice was #1) Regards, -uta The JDK doesn't strictly require the user's home directory to exist and it's possible in some environments for the home directory to become inaccessible during the lifetime of the VM. The main thing (I think) is that exceptions and messages are clear if there is an error accessing something in the home directory. So I think #3 is the right answer. As you point out, this is essentially long standing behavior. My concern with #2 is that it might hurt startup significantly when the home directory is remote. My concern with #1 is that I don't think the JDK should be the one to create the home directory (although in practice it would be very rare). Sounds reasonable. Let's follow that way. The #3 option is chosen. Suggested fix: http://cr.openjdk.java.net/~uta/openjdk-webrevs/JDK-6519127/webrev.03/ Regards, -uta

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