[Bug classpath/22972] New: java.io.File#createTempFile returns the same file to different threads

[pinskia at gcc dot gnu dot org]

createTempFile uses System.currentTimeMillis() to generate a

temporary file name. So, as the source says itself,

   "// XXX - FIXME race condition."

the same file is returned to different threads if they call

createTempFile at the same time.



Using random numbers as Kaffe did before may be safer although

it is not a complete solution, either.




------- Additional Comments From from-classpath at savannah dot gnu dot org  
2005-06-04 17:06 -------
Hmm, could this perhaps be fixed simply by making createTempFile synchronized 
and adding a 1-millisecond delay?

(I don't think that's likely to be a significant slowdown when you're creating 
a file)
------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-08 
20:13 -------
Confirmed, interesting libjava either have an old version of createTempFile or 
a very different 
implementation and does not use currentTimeMillis at all.

-- 
           Summary: java.io.File#createTempFile returns the same file to
                    different threads
           Product: classpath
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: classpath
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: from-classpath at savannah dot gnu dot org
                CC: bug-classpath at gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22972