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view src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp @ 3500:6111c168756f
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author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 08 Aug 2011 15:19:09 +0200 |
parents | f95d63e2154a |
children | e8b0b0392037 |
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/* * 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) { #if G1_REM_SET_LOGGING gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS" " for region [" PTR_FORMAT ", " PTR_FORMAT ")", p, obj, to->bottom(), to->end()); #endif 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