Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp @ 542:9a25e0c45327
6792421: assert(_bitMap->isMarked(addr+size-1),inconsistent Printezis mark)
Summary: The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition.
Reviewed-by: ysr, tonyp
author | jmasa |
---|---|
date | Sat, 31 Jan 2009 00:15:00 -0800 |
parents | 37f87013dfd8 |
children | df6caf649ff7 |
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/* * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ #ifndef SERIALGC class DirtyCardQueueSet; // This barrier is specialized to use a logging barrier to support // snapshot-at-the-beginning marking. class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS { private: // Add "pre_val" to a set of objects that may have been disconnected from the // pre-marking object graph. static void enqueue(oop pre_val); public: G1SATBCardTableModRefBS(MemRegion whole_heap, int max_covered_regions); bool is_a(BarrierSet::Name bsn) { return bsn == BarrierSet::G1SATBCT || CardTableModRefBS::is_a(bsn); } virtual bool has_write_ref_pre_barrier() { return true; } // This notes that we don't need to access any BarrierSet data // structures, so this can be called from a static context. static void write_ref_field_pre_static(void* field, oop newVal) { assert(!UseCompressedOops, "Else needs to be templatized"); oop preVal = *((oop*)field); if (preVal != NULL) { enqueue(preVal); } } // When we know the current java thread: static void write_ref_field_pre_static(void* field, oop newVal, JavaThread* jt); // We export this to make it available in cases where the static // type of the barrier set is known. Note that it is non-virtual. inline void inline_write_ref_field_pre(void* field, oop newVal) { write_ref_field_pre_static(field, newVal); } // This is the more general virtual version. void write_ref_field_pre_work(void* field, oop new_val) { inline_write_ref_field_pre(field, new_val); } virtual void write_ref_array_pre(MemRegion mr); }; // Adds card-table logging to the post-barrier. // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet. class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS { private: DirtyCardQueueSet& _dcqs; public: G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, int max_covered_regions); bool is_a(BarrierSet::Name bsn) { return bsn == BarrierSet::G1SATBCTLogging || G1SATBCardTableModRefBS::is_a(bsn); } void write_ref_field_work(void* field, oop new_val); // Can be called from static contexts. static void write_ref_field_static(void* field, oop new_val); // NB: if you do a whole-heap invalidation, the "usual invariant" defined // above no longer applies. void invalidate(MemRegion mr, bool whole_heap = false); void write_region_work(MemRegion mr) { invalidate(mr); } void write_ref_array_work(MemRegion mr) { invalidate(mr); } }; #endif // SERIALGC