[RFC] Fix for GIO detection/VFS fallback (TCK7 failure)

[Deepak Bhole]

Hi,

Attached patch fixes a TCK failure seen on systems with older libgio.

The way the code works is that it first tries to load libgio-2.0.so and
then verify that all necessary functions are available. If they are not,
it dlcloses the library and falls back to vfs.

In the forest, we have modified this part to wire in system libs and
there is a bug in how it is done. If functions are not found and the
library handle is closed, the caller ignores it and tries to call a
function (g_type_init) via the ptr anyway, causing a SIGSEGV.

OK to apply this to HEAD, 2.0 and 2.1?

Thanks,
Deepak
-------------- next part --------------
diff -up openjdk/jdk/src/solaris/classes/sun/nio/fs/GnomeFileTypeDetector.java.sav openjdk/jdk/src/solaris/classes/sun/nio/fs/GnomeFileTypeDetector.java
diff -up openjdk/jdk/src/solaris/native/sun/nio/fs/GnomeFileTypeDetector.c.sav openjdk/jdk/src/solaris/native/sun/nio/fs/GnomeFileTypeDetector.c
--- openjdk/jdk/src/solaris/native/sun/nio/fs/GnomeFileTypeDetector.c.sav	2012-04-27 23:57:43.187144536 -0400
+++ openjdk/jdk/src/solaris/native/sun/nio/fs/GnomeFileTypeDetector.c	2012-04-28 00:27:44.730373120 -0400
@@ -68,6 +68,12 @@ Java_sun_nio_fs_GnomeFileTypeDetector_in
     ret = gio_init();
 #endif
 
+    // If there was an error initializing GIO, return false immediately
+    if (ret == JNI_FALSE)
+    {
+        return ret;
+    }
+
     g_type_init ();
     return ret;
 }