jdk8-aarch32: Crashing when running test case ParallelProbes.java

[Chi Vo]

Hi All,

Hotspot crashing when I running test case
*/jdk/test/java/nio/file/Files/probeContentType/ParallelProbes.java*

As my analysis, the probeContentType is static method so It is class level.
In this case, we allow many threads access it without synchronize. so It
should be protected by synchronizing to avoid any inconsistent data or also
corrupt data. I test this patch and it works fine.

diff -r dbe7e2abe8b2 -r c9e2721b4711
02.src/01.aarch32_jdk8u/jdk/src/share/classes/java/nio/file/Files.java
--- a/02.src/01.aarch32_jdk8u/jdk/src/share/classes/java/nio/file/Files.java
Fri
Oct 07 15:23:45 2016 +0700
+++ b/02.src/01.aarch32_jdk8u/jdk/src/share/classes/java/nio/file/Files.java
Tue
Oct 25 10:56:47 2016 +0700
@@ -1610,7 +1610,7 @@
      *          If a security manager is installed and it denies an
unspecified
      *          permission required by a file type detector implementation.
      */
-    public static String probeContentType(Path path)
+    public synchronized static String probeContentType(Path path)
         throws IOException
     {
         // try installed file type detectors

Please help take a look my patch.

Thanks you with best regards,
Chi Vo