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 "oops/markOop.hpp"
  27 #include "oops/oop.inline.hpp"
  28 #include "runtime/virtualspace.hpp"
  29 #include "services/memTracker.hpp"
  30 
  31 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  32 
  33 // ReservedSpace
  34 
  35 // Dummy constructor
  36 ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0),
  37     _alignment(0), _special(false), _executable(false) {
  38 }
  39 
  40 ReservedSpace::ReservedSpace(size_t size, size_t preferred_page_size) {
  41   bool has_preferred_page_size = preferred_page_size != 0;
  42   // Want to use large pages where possible and pad with small pages.
  43   size_t page_size = has_preferred_page_size ? preferred_page_size : os::page_size_for_region_unaligned(size, 1);
  44   bool large_pages = page_size != (size_t)os::vm_page_size();
  45   size_t alignment;
  46   if (large_pages && has_preferred_page_size) {
  47     alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity());
  48     // ReservedSpace initialization requires size to be aligned to the given

   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 "memory/virtualspace.hpp"
  27 #include "oops/markOop.hpp"
  28 #include "oops/oop.inline.hpp"

  29 #include "services/memTracker.hpp"
  30 
  31 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  32 
  33 // ReservedSpace
  34 
  35 // Dummy constructor
  36 ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0),
  37     _alignment(0), _special(false), _executable(false) {
  38 }
  39 
  40 ReservedSpace::ReservedSpace(size_t size, size_t preferred_page_size) {
  41   bool has_preferred_page_size = preferred_page_size != 0;
  42   // Want to use large pages where possible and pad with small pages.
  43   size_t page_size = has_preferred_page_size ? preferred_page_size : os::page_size_for_region_unaligned(size, 1);
  44   bool large_pages = page_size != (size_t)os::vm_page_size();
  45   size_t alignment;
  46   if (large_pages && has_preferred_page_size) {
  47     alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity());
  48     // ReservedSpace initialization requires size to be aligned to the given