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src/hotspot/share/memory/metaspace/metachunk.cpp

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rev 50068 : [mq]: metaspace-split


   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/allocation.hpp"
  27 #include "memory/metachunk.hpp"


  28 #include "utilities/align.hpp"
  29 #include "utilities/copy.hpp"
  30 #include "utilities/debug.hpp"
  31 
  32 class VirtualSpaceNode;

  33 
  34 size_t Metachunk::object_alignment() {
  35   // Must align pointers and sizes to 8,
  36   // so that 64 bit types get correctly aligned.
  37   const size_t alignment = 8;
  38 
  39   // Make sure that the Klass alignment also agree.
  40   STATIC_ASSERT(alignment == (size_t)KlassAlignmentInBytes);
  41 
  42   return alignment;
  43 }
  44 
  45 size_t Metachunk::overhead() {
  46   return align_up(sizeof(Metachunk), object_alignment()) / BytesPerWord;
  47 }
  48 
  49 // Metachunk methods
  50 
  51 Metachunk::Metachunk(ChunkIndex chunktype, bool is_class, size_t word_size,
  52                      VirtualSpaceNode* container)


 130          p2i(this), word_size() * sizeof(MetaWord), required_alignment);
 131 }
 132 
 133 #endif // ASSERT
 134 
 135 // Helper, returns a descriptive name for the given index.
 136 const char* chunk_size_name(ChunkIndex index) {
 137   switch (index) {
 138     case SpecializedIndex:
 139       return "specialized";
 140     case SmallIndex:
 141       return "small";
 142     case MediumIndex:
 143       return "medium";
 144     case HumongousIndex:
 145       return "humongous";
 146     default:
 147       return "Invalid index";
 148   }
 149 }























   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/allocation.hpp"
  27 #include "memory/metaspace/metachunk.hpp"
  28 #include "memory/metaspace/occupancyMap.hpp"
  29 #include "memory/metaspace/virtualSpaceNode.hpp"
  30 #include "utilities/align.hpp"
  31 #include "utilities/copy.hpp"
  32 #include "utilities/debug.hpp"
  33 
  34 namespace metaspace {
  35 namespace internals {
  36 
  37 size_t Metachunk::object_alignment() {
  38   // Must align pointers and sizes to 8,
  39   // so that 64 bit types get correctly aligned.
  40   const size_t alignment = 8;
  41 
  42   // Make sure that the Klass alignment also agree.
  43   STATIC_ASSERT(alignment == (size_t)KlassAlignmentInBytes);
  44 
  45   return alignment;
  46 }
  47 
  48 size_t Metachunk::overhead() {
  49   return align_up(sizeof(Metachunk), object_alignment()) / BytesPerWord;
  50 }
  51 
  52 // Metachunk methods
  53 
  54 Metachunk::Metachunk(ChunkIndex chunktype, bool is_class, size_t word_size,
  55                      VirtualSpaceNode* container)


 133          p2i(this), word_size() * sizeof(MetaWord), required_alignment);
 134 }
 135 
 136 #endif // ASSERT
 137 
 138 // Helper, returns a descriptive name for the given index.
 139 const char* chunk_size_name(ChunkIndex index) {
 140   switch (index) {
 141     case SpecializedIndex:
 142       return "specialized";
 143     case SmallIndex:
 144       return "small";
 145     case MediumIndex:
 146       return "medium";
 147     case HumongousIndex:
 148       return "humongous";
 149     default:
 150       return "Invalid index";
 151   }
 152 }
 153 
 154 #ifdef ASSERT
 155 void do_verify_chunk(Metachunk* chunk) {
 156   guarantee(chunk != NULL, "Sanity");
 157   // Verify chunk itself; then verify that it is consistent with the
 158   // occupany map of its containing node.
 159   chunk->verify();
 160   VirtualSpaceNode* const vsn = chunk->container();
 161   OccupancyMap* const ocmap = vsn->occupancy_map();
 162   ocmap->verify_for_chunk(chunk);
 163 }
 164 #endif
 165 
 166 void do_update_in_use_info_for_chunk(Metachunk* chunk, bool inuse) {
 167   chunk->set_is_tagged_free(!inuse);
 168   OccupancyMap* const ocmap = chunk->container()->occupancy_map();
 169   ocmap->set_region_in_use((MetaWord*)chunk, chunk->word_size(), inuse);
 170 }
 171 
 172 } // namespace metaspace
 173 } // namespace internals
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