1 /*
   2  * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 # include "incls/_precompiled.incl"
  26 # include "incls/_objectStartArray.cpp.incl"




  27 
  28 void ObjectStartArray::initialize(MemRegion reserved_region) {
  29   // We're based on the assumption that we use the same
  30   // size blocks as the card table.
  31   assert((int)block_size == (int)CardTableModRefBS::card_size, "Sanity");
  32   assert((int)block_size <= 512, "block_size must be less than or equal to 512");
  33 
  34   // Calculate how much space must be reserved
  35   _reserved_region = reserved_region;
  36 
  37   size_t bytes_to_reserve = reserved_region.word_size() / block_size_in_words;
  38   assert(bytes_to_reserve > 0, "Sanity");
  39 
  40   bytes_to_reserve =
  41     align_size_up(bytes_to_reserve, os::vm_allocation_granularity());
  42 
  43   // Do not use large-pages for the backing store. The one large page region
  44   // will be used for the heap proper.
  45   ReservedSpace backing_store(bytes_to_reserve);
  46   if (!backing_store.is_reserved()) {

   1 /*
   2  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc_implementation/parallelScavenge/objectStartArray.hpp"
  27 #include "memory/allocation.inline.hpp"
  28 #include "memory/cardTableModRefBS.hpp"
  29 #include "oops/oop.inline.hpp"
  30 #include "runtime/java.hpp"
  31 
  32 void ObjectStartArray::initialize(MemRegion reserved_region) {
  33   // We're based on the assumption that we use the same
  34   // size blocks as the card table.
  35   assert((int)block_size == (int)CardTableModRefBS::card_size, "Sanity");
  36   assert((int)block_size <= 512, "block_size must be less than or equal to 512");
  37 
  38   // Calculate how much space must be reserved
  39   _reserved_region = reserved_region;
  40 
  41   size_t bytes_to_reserve = reserved_region.word_size() / block_size_in_words;
  42   assert(bytes_to_reserve > 0, "Sanity");
  43 
  44   bytes_to_reserve =
  45     align_size_up(bytes_to_reserve, os::vm_allocation_granularity());
  46 
  47   // Do not use large-pages for the backing store. The one large page region
  48   // will be used for the heap proper.
  49   ReservedSpace backing_store(bytes_to_reserve);
  50   if (!backing_store.is_reserved()) {