--- a/hotspot/src/share/vm/memory/filemap.hpp	Tue Nov 18 15:25:14 2014 -0800
+++ b/hotspot/src/share/vm/memory/filemap.hpp	Wed Dec 03 14:21:14 2014 +0000
@@ -44,8 +44,11 @@
 class SharedClassPathEntry VALUE_OBJ_CLASS_SPEC {
 public:
   const char *_name;
-  time_t _timestamp;          // jar timestamp,  0 if is directory
-  long   _filesize;           // jar file size, -1 if is directory
+  time_t _timestamp;          // jar timestamp,  0 if is directory or other
+  long   _filesize;           // jar file size, -1 if is directory, -2 if other
+  bool is_jar() {
+    return _timestamp != 0;
+  }
   bool is_dir() {
     return _filesize == -1;
   }