src/solaris/native/java/io/io_util_md.c

*** 1,7 ****
  /*
!  * Copyright (c) 2001, 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) 2001, 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
*** 21,30 ****
--- 21,34 ----
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
+ #if defined(__linux__)
+ #define _FILE_OFFSET_BITS 64
+ #endif
+ 
  #include "jni.h"
  #include "jni_util.h"
  #include "jvm.h"
  #include "io_util.h"
  #include "io_util_md.h"
*** 206,215 ****
--- 210,238 ----
  
  jint
  handleSetLength(FD fd, jlong length)
  {
      int result;
+ #if defined(__linux__)
+     /*
+      * On Linux, if the file size is being increased, then ftruncate64()
+      * will modify the metadata value of the size without actually allocating
+      * any blocks which can cause a SIGBUS error if the file is subsequently
+      * memory-mapped.
+      */
+     struct stat64 sb;
+ 
+     if (fstat64(fd, &sb) == 0 && length > sb.st_blocks*512) {
+         RESTARTABLE(posix_fallocate(fd, 0, length), result);
+         // Return on success or if errno is neither EOPNOTSUPP nor ENOSYS
+         if (result == 0) {
+             return 0;
+         } else if (errno != EOPNOTSUPP && errno != ENOSYS) {
+             return result;
+         }
+     }
+ #endif
      RESTARTABLE(ftruncate64(fd, length), result);
      return result;
  }
  
  size_t