Mercurial > hg > graal-jvmci-8
view src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp @ 942:2c79770d1f6e
6819085: G1: use larger and/or user settable region size
Summary: Instead of the region size being hard-coded, allow the user to set it.
Reviewed-by: jmasa, johnc, apetrusenko
author | tonyp |
---|---|
date | Thu, 30 Jul 2009 16:22:58 -0400 |
parents | df6caf649ff7 |
children | c18cbe5936b8 |
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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. template <class T> static void write_ref_field_pre_static(T* field, oop newVal) { T heap_oop = oopDesc::load_heap_oop(field); if (!oopDesc::is_null(heap_oop)) { enqueue(oopDesc::decode_heap_oop(heap_oop)); } } // When we know the current java thread: template <class T> static void write_ref_field_pre_static(T* 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. template <class T> inline void inline_write_ref_field_pre(T* field, oop newVal) { write_ref_field_pre_static(field, newVal); } // These are the more general virtual versions. virtual void write_ref_field_pre_work(oop* field, oop new_val) { inline_write_ref_field_pre(field, new_val); } virtual void write_ref_field_pre_work(narrowOop* field, oop new_val) { inline_write_ref_field_pre(field, new_val); } virtual void write_ref_field_pre_work(void* field, oop new_val) { guarantee(false, "Not needed"); } template <class T> void write_ref_array_pre_work(T* dst, int count); virtual void write_ref_array_pre(oop* dst, int count) { write_ref_array_pre_work(dst, count); } virtual void write_ref_array_pre(narrowOop* dst, int count) { write_ref_array_pre_work(dst, count); } }; // 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