src/os/linux/vm/os_linux.cpp

rev 5913 : Linux code cleanup

*** 1,7 ****
  /*
!  * Copyright (c) 1999, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 1999, 2014, 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.
*** 2997,3008 ****
    size_t page_sz = os::vm_page_size();
    unsigned pages = size / page_sz;
  
    unsigned char vec[1];
    unsigned imin = 1, imax = pages + 1, imid;
!   int mincore_return_value;
  
    while (imin < imax) {
      imid = (imax + imin) / 2;
      nbot = ntop - (imid * page_sz);
  
      // Use a trick with mincore to check whether the page is mapped or not.
--- 2997,3010 ----
    size_t page_sz = os::vm_page_size();
    unsigned pages = size / page_sz;
  
    unsigned char vec[1];
    unsigned imin = 1, imax = pages + 1, imid;
!   int mincore_return_value = 0;
  
+   assert(imin < imax, "Unexpected page size");
+ 
    while (imin < imax) {
      imid = (imax + imin) / 2;
      nbot = ntop - (imid * page_sz);
  
      // Use a trick with mincore to check whether the page is mapped or not.