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src/share/vm/oops/instanceRefKlass.cpp

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rev 8362 : 8079792: GC directory structure cleanup
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   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 "classfile/javaClasses.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "gc_interface/collectedHeap.inline.hpp"
  29 #include "memory/genCollectedHeap.hpp"
  30 #include "memory/specialized_oop_closures.hpp"
  31 #include "oops/instanceRefKlass.inline.hpp"
  32 #include "oops/oop.inline.hpp"
  33 #include "utilities/preserveException.hpp"
  34 #include "utilities/macros.hpp"

  35 
  36 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  37 
  38 void InstanceRefKlass::update_nonstatic_oop_maps(Klass* k) {
  39   // Clear the nonstatic oop-map entries corresponding to referent
  40   // and nextPending field.  They are treated specially by the
  41   // garbage collector.
  42   // The discovered field is used only by the garbage collector
  43   // and is also treated specially.
  44   InstanceKlass* ik = InstanceKlass::cast(k);
  45 
  46   // Check that we have the right class
  47   debug_only(static bool first_time = true);
  48   assert(k == SystemDictionary::Reference_klass() && first_time,
  49          "Invalid update of maps");
  50   debug_only(first_time = false);
  51   assert(ik->nonstatic_oop_map_count() == 1, "just checking");
  52 
  53   OopMapBlock* map = ik->start_of_nonstatic_oop_maps();
  54 




   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 "classfile/javaClasses.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "gc/shared/collectedHeap.inline.hpp"
  29 #include "gc/shared/genCollectedHeap.hpp"
  30 #include "gc/shared/specialized_oop_closures.hpp"
  31 #include "oops/instanceRefKlass.inline.hpp"
  32 #include "oops/oop.inline.hpp"

  33 #include "utilities/macros.hpp"
  34 #include "utilities/preserveException.hpp"
  35 
  36 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  37 
  38 void InstanceRefKlass::update_nonstatic_oop_maps(Klass* k) {
  39   // Clear the nonstatic oop-map entries corresponding to referent
  40   // and nextPending field.  They are treated specially by the
  41   // garbage collector.
  42   // The discovered field is used only by the garbage collector
  43   // and is also treated specially.
  44   InstanceKlass* ik = InstanceKlass::cast(k);
  45 
  46   // Check that we have the right class
  47   debug_only(static bool first_time = true);
  48   assert(k == SystemDictionary::Reference_klass() && first_time,
  49          "Invalid update of maps");
  50   debug_only(first_time = false);
  51   assert(ik->nonstatic_oop_map_count() == 1, "just checking");
  52 
  53   OopMapBlock* map = ik->start_of_nonstatic_oop_maps();
  54 


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