jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@4f93f0d00802 (annotated)

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@4f93f0d00802 (annotated)

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp

Tue, 20 Sep 2011 09:59:59 -0400

author: tonyp
date: Tue, 20 Sep 2011 09:59:59 -0400
changeset 3168: 4f93f0d00802
parent 2974: e8b0b0392037
child 3357: 441e946dc1af
permissions: -rw-r--r--

7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc

 /*
  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP
 #include "gc_implementation/g1/g1RemSet.hpp"
 #include "gc_implementation/g1/heapRegionRemSet.hpp"
 #include "oops/oop.inline.hpp"
 inline size_t G1RemSet::n_workers() {
   if (_g1->workers() != NULL) {
     return _g1->workers()->total_workers();
   } else {
     return 1;
   }
 }
 template <class T>
 inline void G1RemSet::write_ref(HeapRegion* from, T* p) {
   par_write_ref(from, p, 0);
 }
 template <class T>
 inline void G1RemSet::par_write_ref(HeapRegion* from, T* p, int tid) {
   oop obj = oopDesc::load_decode_heap_oop(p);
 #ifdef ASSERT
   // can't do because of races
   // assert(obj == NULL || obj->is_oop(), "expected an oop");
   // Do the safe subset of is_oop
   if (obj != NULL) {
 #ifdef CHECK_UNHANDLED_OOPS
     oopDesc* o = obj.obj();
 #else
     oopDesc* o = obj;
 #endif // CHECK_UNHANDLED_OOPS
     assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
     assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
   }
 #endif // ASSERT
   assert(from == NULL || from->is_in_reserved(p), "p is not in from");
   HeapRegion* to = _g1->heap_region_containing(obj);
   if (to != NULL && from != to) {
     assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
     to->rem_set()->add_reference(p, tid);
   }
 }
 template <class T>
 inline void UpdateRSOopClosure::do_oop_work(T* p) {
   assert(_from != NULL, "from region must be non-NULL");
   _rs->par_write_ref(_from, p, _worker_i);
 }
 template <class T>
 inline void UpdateRSetImmediate::do_oop_work(T* p) {
   assert(_from->is_in_reserved(p), "paranoia");
   T heap_oop = oopDesc::load_heap_oop(p);
   if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) {
     _g1_rem_set->par_write_ref(_from, p, 0);
   }
 }
 template <class T>
 inline void UpdateRSOrPushRefOopClosure::do_oop_work(T* p) {
   oop obj = oopDesc::load_decode_heap_oop(p);
 #ifdef ASSERT
   // can't do because of races
   // assert(obj == NULL || obj->is_oop(), "expected an oop");
   // Do the safe subset of is_oop
   if (obj != NULL) {
 #ifdef CHECK_UNHANDLED_OOPS
     oopDesc* o = obj.obj();
 #else
     oopDesc* o = obj;
 #endif // CHECK_UNHANDLED_OOPS
     assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
     assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
   }
 #endif // ASSERT
   assert(_from != NULL, "from region must be non-NULL");
   HeapRegion* to = _g1->heap_region_containing(obj);
   if (to != NULL && _from != to) {
     // The _record_refs_into_cset flag is true during the RSet
     // updating part of an evacuation pause. It is false at all
     // other times:
     //  * rebuilding the rembered sets after a full GC
     //  * during concurrent refinement.
     //  * updating the remembered sets of regions in the collection
     //    set in the event of an evacuation failure (when deferred
     //    updates are enabled).
     if (_record_refs_into_cset && to->in_collection_set()) {
       // We are recording references that point into the collection
       // set and this particular reference does exactly that...
       // If the referenced object has already been forwarded
       // to itself, we are handling an evacuation failure and
       // we have already visited/tried to copy this object
       // there is no need to retry.
       if (!self_forwarded(obj)) {
         assert(_push_ref_cl != NULL, "should not be null");
         // Push the reference in the refs queue of the G1ParScanThreadState
         // instance for this worker thread.
         _push_ref_cl->do_oop(p);
       }
       // Deferred updates to the CSet are either discarded (in the normal case),
       // or processed (if an evacuation failure occurs) at the end
       // of the collection.
       // See G1RemSet::cleanup_after_oops_into_collection_set_do().
     } else {
       // We either don't care about pushing references that point into the
       // collection set (i.e. we're not during an evacuation pause) _or_
       // the reference doesn't point into the collection set. Either way
       // we add the reference directly to the RSet of the region containing
       // the referenced object.
       _g1_rem_set->par_write_ref(_from, p, _worker_i);
     }
   }
 }
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@4f93f0d00802 (annotated)

src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp