src/java.base/linux/classes/sun/nio/fs/DefaultFileSystemProvider.java

8213406: (fs) More than one instance of built-in FileSystem observed in heap
Reviewed-by: alanb, cushon, weijun

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -23,21 +23,31 @@
  * questions.
  */
 
 package sun.nio.fs;
 
-import java.nio.file.spi.FileSystemProvider;
+import java.nio.file.FileSystem;
 
 /**
  * Creates this platform's default FileSystemProvider.
  */
 
 public class DefaultFileSystemProvider {
+    private static final LinuxFileSystemProvider INSTANCE
+        = new LinuxFileSystemProvider();
+
     private DefaultFileSystemProvider() { }
 
     /**
-     * Returns the default FileSystemProvider.
+     * Returns the platform's default file system provider.
+     */
+    public static LinuxFileSystemProvider instance() {
+        return INSTANCE;
+    }
+
+    /**
+     * Returns the platform's default file system.
      */
-    public static FileSystemProvider create() {
-        return new LinuxFileSystemProvider();
+    public static FileSystem theFileSystem() {
+        return INSTANCE.theFileSystem();
     }
 }