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/_g1MarkSweep.cpp.incl"






















  27 
  28 class HeapRegion;
  29 
  30 void G1MarkSweep::invoke_at_safepoint(ReferenceProcessor* rp,
  31                                       bool clear_all_softrefs) {
  32   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
  33 
  34   SharedHeap* sh = SharedHeap::heap();
  35 #ifdef ASSERT
  36   if (sh->collector_policy()->should_clear_all_soft_refs()) {
  37     assert(clear_all_softrefs, "Policy should have been checked earler");
  38   }
  39 #endif
  40   // hook up weak ref data so it can be used during Mark-Sweep
  41   assert(GenMarkSweep::ref_processor() == NULL, "no stomping");
  42   assert(rp != NULL, "should be non-NULL");
  43   GenMarkSweep::_ref_processor = rp;
  44   rp->setup_policy(clear_all_softrefs);
  45 
  46   // When collecting the permanent generation methodOops may be moving,

   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 "classfile/javaClasses.hpp"
  27 #include "classfile/symbolTable.hpp"
  28 #include "classfile/systemDictionary.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "code/codeCache.hpp"
  31 #include "code/icBuffer.hpp"
  32 #include "gc_implementation/g1/g1MarkSweep.hpp"
  33 #include "memory/gcLocker.hpp"
  34 #include "memory/genCollectedHeap.hpp"
  35 #include "memory/modRefBarrierSet.hpp"
  36 #include "memory/referencePolicy.hpp"
  37 #include "memory/space.hpp"
  38 #include "oops/instanceRefKlass.hpp"
  39 #include "oops/oop.inline.hpp"
  40 #include "prims/jvmtiExport.hpp"
  41 #include "runtime/aprofiler.hpp"
  42 #include "runtime/biasedLocking.hpp"
  43 #include "runtime/fprofiler.hpp"
  44 #include "runtime/synchronizer.hpp"
  45 #include "runtime/thread.hpp"
  46 #include "runtime/vmThread.hpp"
  47 #include "utilities/copy.hpp"
  48 #include "utilities/events.hpp"
  49 
  50 class HeapRegion;
  51 
  52 void G1MarkSweep::invoke_at_safepoint(ReferenceProcessor* rp,
  53                                       bool clear_all_softrefs) {
  54   assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
  55 
  56   SharedHeap* sh = SharedHeap::heap();
  57 #ifdef ASSERT
  58   if (sh->collector_policy()->should_clear_all_soft_refs()) {
  59     assert(clear_all_softrefs, "Policy should have been checked earler");
  60   }
  61 #endif
  62   // hook up weak ref data so it can be used during Mark-Sweep
  63   assert(GenMarkSweep::ref_processor() == NULL, "no stomping");
  64   assert(rp != NULL, "should be non-NULL");
  65   GenMarkSweep::_ref_processor = rp;
  66   rp->setup_policy(clear_all_softrefs);
  67 
  68   // When collecting the permanent generation methodOops may be moving,