ysr@777: /*
johnc@2060:  * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP
stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP
stefank@2314: 
stefank@2314: #include "gc_implementation/g1/g1RemSet.hpp"
stefank@2314: #include "gc_implementation/g1/heapRegionRemSet.hpp"
stefank@2314: #include "oops/oop.inline.hpp"
stefank@2314: 
ysr@777: inline size_t G1RemSet::n_workers() {
ysr@777:   if (_g1->workers() != NULL) {
ysr@777:     return _g1->workers()->total_workers();
ysr@777:   } else {
ysr@777:     return 1;
ysr@777:   }
ysr@777: }
ysr@777: 
johnc@2216: template <class T>
johnc@2302: inline void G1RemSet::write_ref(HeapRegion* from, T* p) {
johnc@2302:   par_write_ref(from, p, 0);
ysr@777: }
ysr@777: 
johnc@2216: template <class T>
johnc@2302: inline void G1RemSet::par_write_ref(HeapRegion* from, T* p, int tid) {
ysr@1280:   oop obj = oopDesc::load_decode_heap_oop(p);
ysr@777: #ifdef ASSERT
ysr@777:   // can't do because of races
ysr@777:   // assert(obj == NULL || obj->is_oop(), "expected an oop");
ysr@777: 
ysr@777:   // Do the safe subset of is_oop
ysr@777:   if (obj != NULL) {
ysr@777: #ifdef CHECK_UNHANDLED_OOPS
ysr@777:     oopDesc* o = obj.obj();
ysr@777: #else
ysr@777:     oopDesc* o = obj;
ysr@777: #endif // CHECK_UNHANDLED_OOPS
ysr@777:     assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
ysr@777:     assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
ysr@777:   }
ysr@777: #endif // ASSERT
johnc@2060: 
johnc@2060:   assert(from == NULL || from->is_in_reserved(p), "p is not in from");
johnc@2060: 
ysr@777:   HeapRegion* to = _g1->heap_region_containing(obj);
johnc@2302:   if (to != NULL && from != to) {
johnc@2302:     assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
johnc@2302:     to->rem_set()->add_reference(p, tid);
ysr@777:   }
ysr@777: }
apetrusenko@1061: 
johnc@2216: template <class T>
johnc@2216: inline void UpdateRSOopClosure::do_oop_work(T* p) {
apetrusenko@1061:   assert(_from != NULL, "from region must be non-NULL");
apetrusenko@1061:   _rs->par_write_ref(_from, p, _worker_i);
apetrusenko@1061: }
johnc@2060: 
johnc@2216: template <class T>
johnc@2216: inline void UpdateRSetImmediate::do_oop_work(T* p) {
johnc@2060:   assert(_from->is_in_reserved(p), "paranoia");
johnc@2060:   T heap_oop = oopDesc::load_heap_oop(p);
johnc@2060:   if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) {
johnc@2060:     _g1_rem_set->par_write_ref(_from, p, 0);
johnc@2060:   }
johnc@2060: }
johnc@2060: 
johnc@2302: template <class T>
johnc@2302: inline void UpdateRSOrPushRefOopClosure::do_oop_work(T* p) {
johnc@2302:   oop obj = oopDesc::load_decode_heap_oop(p);
johnc@2302: #ifdef ASSERT
johnc@2302:   // can't do because of races
johnc@2302:   // assert(obj == NULL || obj->is_oop(), "expected an oop");
johnc@2302: 
johnc@2302:   // Do the safe subset of is_oop
johnc@2302:   if (obj != NULL) {
johnc@2302: #ifdef CHECK_UNHANDLED_OOPS
johnc@2302:     oopDesc* o = obj.obj();
johnc@2302: #else
johnc@2302:     oopDesc* o = obj;
johnc@2302: #endif // CHECK_UNHANDLED_OOPS
johnc@2302:     assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
johnc@2302:     assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
johnc@2302:   }
johnc@2302: #endif // ASSERT
johnc@2302: 
johnc@2302:   assert(_from != NULL, "from region must be non-NULL");
johnc@2302: 
johnc@2302:   HeapRegion* to = _g1->heap_region_containing(obj);
johnc@2302:   if (to != NULL && _from != to) {
johnc@2302:     // The _record_refs_into_cset flag is true during the RSet
johnc@2302:     // updating part of an evacuation pause. It is false at all
johnc@2302:     // other times:
johnc@2302:     //  * rebuilding the rembered sets after a full GC
johnc@2302:     //  * during concurrent refinement.
johnc@2302:     //  * updating the remembered sets of regions in the collection
johnc@2302:     //    set in the event of an evacuation failure (when deferred
johnc@2302:     //    updates are enabled).
johnc@2302: 
johnc@2302:     if (_record_refs_into_cset && to->in_collection_set()) {
johnc@2302:       // We are recording references that point into the collection
johnc@2302:       // set and this particular reference does exactly that...
johnc@2302:       // If the referenced object has already been forwarded
johnc@2302:       // to itself, we are handling an evacuation failure and
johnc@2302:       // we have already visited/tried to copy this object
johnc@2302:       // there is no need to retry.
johnc@2302:       if (!self_forwarded(obj)) {
johnc@2302:         assert(_push_ref_cl != NULL, "should not be null");
johnc@2302:         // Push the reference in the refs queue of the G1ParScanThreadState
johnc@2302:         // instance for this worker thread.
johnc@2302:         _push_ref_cl->do_oop(p);
johnc@2302:       }
johnc@2302: 
johnc@2302:       // Deferred updates to the CSet are either discarded (in the normal case),
johnc@2302:       // or processed (if an evacuation failure occurs) at the end
johnc@2302:       // of the collection.
johnc@2302:       // See G1RemSet::cleanup_after_oops_into_collection_set_do().
johnc@2302:     } else {
johnc@2302:       // We either don't care about pushing references that point into the
johnc@2302:       // collection set (i.e. we're not during an evacuation pause) _or_
johnc@2302:       // the reference doesn't point into the collection set. Either way
johnc@2302:       // we add the reference directly to the RSet of the region containing
johnc@2302:       // the referenced object.
johnc@2302:       _g1_rem_set->par_write_ref(_from, p, _worker_i);
johnc@2302:     }
johnc@2302:   }
johnc@2302: }
johnc@2302: 
stefank@2314: 
stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP