ysr@777: /*
ysr@777:  * Copyright 2001-2007 Sun Microsystems, Inc.  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:  *
ysr@777:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@777:  * CA 95054 USA or visit www.sun.com if you need additional information or
ysr@777:  * have any questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
ysr@777: #include "incls/_precompiled.incl"
ysr@777: #include "incls/_g1SATBCardTableModRefBS.cpp.incl"
ysr@777: 
ysr@777: G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap,
ysr@777:                                                  int max_covered_regions) :
ysr@777:     CardTableModRefBSForCTRS(whole_heap, max_covered_regions)
ysr@777: {
ysr@777:   _kind = G1SATBCT;
ysr@777: }
ysr@777: 
ysr@777: 
ysr@777: void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
ysr@777:   if (!JavaThread::satb_mark_queue_set().active()) return;
ysr@777:   Thread* thr = Thread::current();
ysr@777:   if (thr->is_Java_thread()) {
ysr@777:     JavaThread* jt = (JavaThread*)thr;
ysr@777:     jt->satb_mark_queue().enqueue(pre_val);
ysr@777:   } else {
ysr@777:     MutexLocker x(Shared_SATB_Q_lock);
ysr@777:     JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val);
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: // When we know the current java thread:
ysr@777: void
ysr@777: G1SATBCardTableModRefBS::write_ref_field_pre_static(void* field,
ysr@777:                                                     oop newVal,
ysr@777:                                                     JavaThread* jt) {
ysr@777:   if (!JavaThread::satb_mark_queue_set().active()) return;
ysr@777:   assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop");
ysr@777:   oop preVal = *(oop*)field;
ysr@777:   if (preVal != NULL) {
ysr@777:     jt->satb_mark_queue().enqueue(preVal);
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: void
ysr@777: G1SATBCardTableModRefBS::write_ref_array_pre(MemRegion mr) {
ysr@777:   if (!JavaThread::satb_mark_queue_set().active()) return;
ysr@777:   assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop");
ysr@777:   oop* elem_ptr = (oop*)mr.start();
ysr@777:   while ((HeapWord*)elem_ptr < mr.end()) {
ysr@777:     oop elem = *elem_ptr;
ysr@777:     if (elem != NULL) enqueue(elem);
ysr@777:     elem_ptr++;
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: 
ysr@777: 
ysr@777: G1SATBCardTableLoggingModRefBS::
ysr@777: G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,
ysr@777:                                int max_covered_regions) :
ysr@777:   G1SATBCardTableModRefBS(whole_heap, max_covered_regions),
ysr@777:   _dcqs(JavaThread::dirty_card_queue_set())
ysr@777: {
ysr@777:   _kind = G1SATBCTLogging;
ysr@777: }
ysr@777: 
ysr@777: void
ysr@777: G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field,
ysr@777:                                                      oop new_val) {
ysr@777:   jbyte* byte = byte_for(field);
ysr@777:   if (*byte != dirty_card) {
ysr@777:     *byte = dirty_card;
ysr@777:     Thread* thr = Thread::current();
ysr@777:     if (thr->is_Java_thread()) {
ysr@777:       JavaThread* jt = (JavaThread*)thr;
ysr@777:       jt->dirty_card_queue().enqueue(byte);
ysr@777:     } else {
ysr@777:       MutexLockerEx x(Shared_DirtyCardQ_lock,
ysr@777:                       Mutex::_no_safepoint_check_flag);
ysr@777:       _dcqs.shared_dirty_card_queue()->enqueue(byte);
ysr@777:     }
ysr@777:   }
ysr@777: }
ysr@777: 
ysr@777: void
ysr@777: G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field,
ysr@777:                                                        oop new_val) {
ysr@777:   uintptr_t field_uint = (uintptr_t)field;
ysr@777:   uintptr_t new_val_uint = (uintptr_t)new_val;
ysr@777:   uintptr_t comb = field_uint ^ new_val_uint;
ysr@777:   comb = comb >> HeapRegion::LogOfHRGrainBytes;
ysr@777:   if (comb == 0) return;
ysr@777:   if (new_val == NULL) return;
ysr@777:   // Otherwise, log it.
ysr@777:   G1SATBCardTableLoggingModRefBS* g1_bs =
ysr@777:     (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set();
ysr@777:   g1_bs->write_ref_field_work(field, new_val);
ysr@777: }
ysr@777: 
ysr@777: void
ysr@777: G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) {
ysr@777:   jbyte* byte = byte_for(mr.start());
ysr@777:   jbyte* last_byte = byte_for(mr.last());
ysr@777:   Thread* thr = Thread::current();
ysr@777:   if (whole_heap) {
ysr@777:     while (byte <= last_byte) {
ysr@777:       *byte = dirty_card;
ysr@777:       byte++;
ysr@777:     }
ysr@777:   } else {
ysr@777:     // Enqueue if necessary.
ysr@777:     if (thr->is_Java_thread()) {
ysr@777:       JavaThread* jt = (JavaThread*)thr;
ysr@777:       while (byte <= last_byte) {
ysr@777:         if (*byte != dirty_card) {
ysr@777:           *byte = dirty_card;
ysr@777:           jt->dirty_card_queue().enqueue(byte);
ysr@777:         }
ysr@777:         byte++;
ysr@777:       }
ysr@777:     } else {
ysr@777:       MutexLockerEx x(Shared_DirtyCardQ_lock,
ysr@777:                       Mutex::_no_safepoint_check_flag);
ysr@777:       while (byte <= last_byte) {
ysr@777:         if (*byte != dirty_card) {
ysr@777:           *byte = dirty_card;
ysr@777:           _dcqs.shared_dirty_card_queue()->enqueue(byte);
ysr@777:         }
ysr@777:         byte++;
ysr@777:       }
ysr@777:     }
ysr@777:   }
ysr@777: }