src/java.base/windows/classes/sun/nio/ch/FileDispatcherImpl.java

rev 16200 : 8168628: (fc) SIGBUS when extending file size to map it
Summary: Synchronize file extension and subsequent map0(); on Linux use fallocate64() instead of ftruncate64().
Reviewed-by: rehn, simonis, alanb

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 2013, 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
--- 1,7 ----
  /*
!  * Copyright (c) 2000, 2016, 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
*** 82,91 ****
--- 82,96 ----
  
      int truncate(FileDescriptor fd, long size) throws IOException {
          return truncate0(fd, size);
      }
  
+     int allocate(FileDescriptor fd, long size) throws IOException {
+         // truncate0() works for extending and truncating file size
+         return truncate0(fd, size);
+     }
+ 
      long size(FileDescriptor fd) throws IOException {
          return size0(fd);
      }
  
      int lock(FileDescriptor fd, boolean blocking, long pos, long size,