1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp Thu Jun 05 15:57:56 2008 -0700
1.3 @@ -0,0 +1,150 @@
1.4 +/*
1.5 + * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "incls/_precompiled.incl"
1.29 +#include "incls/_g1SATBCardTableModRefBS.cpp.incl"
1.30 +
1.31 +G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap,
1.32 + int max_covered_regions) :
1.33 + CardTableModRefBSForCTRS(whole_heap, max_covered_regions)
1.34 +{
1.35 + _kind = G1SATBCT;
1.36 +}
1.37 +
1.38 +
1.39 +void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
1.40 + if (!JavaThread::satb_mark_queue_set().active()) return;
1.41 + Thread* thr = Thread::current();
1.42 + if (thr->is_Java_thread()) {
1.43 + JavaThread* jt = (JavaThread*)thr;
1.44 + jt->satb_mark_queue().enqueue(pre_val);
1.45 + } else {
1.46 + MutexLocker x(Shared_SATB_Q_lock);
1.47 + JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val);
1.48 + }
1.49 +}
1.50 +
1.51 +// When we know the current java thread:
1.52 +void
1.53 +G1SATBCardTableModRefBS::write_ref_field_pre_static(void* field,
1.54 + oop newVal,
1.55 + JavaThread* jt) {
1.56 + if (!JavaThread::satb_mark_queue_set().active()) return;
1.57 + assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop");
1.58 + oop preVal = *(oop*)field;
1.59 + if (preVal != NULL) {
1.60 + jt->satb_mark_queue().enqueue(preVal);
1.61 + }
1.62 +}
1.63 +
1.64 +void
1.65 +G1SATBCardTableModRefBS::write_ref_array_pre(MemRegion mr) {
1.66 + if (!JavaThread::satb_mark_queue_set().active()) return;
1.67 + assert(!UseCompressedOops, "Else will need to modify this to deal with narrowOop");
1.68 + oop* elem_ptr = (oop*)mr.start();
1.69 + while ((HeapWord*)elem_ptr < mr.end()) {
1.70 + oop elem = *elem_ptr;
1.71 + if (elem != NULL) enqueue(elem);
1.72 + elem_ptr++;
1.73 + }
1.74 +}
1.75 +
1.76 +
1.77 +
1.78 +G1SATBCardTableLoggingModRefBS::
1.79 +G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,
1.80 + int max_covered_regions) :
1.81 + G1SATBCardTableModRefBS(whole_heap, max_covered_regions),
1.82 + _dcqs(JavaThread::dirty_card_queue_set())
1.83 +{
1.84 + _kind = G1SATBCTLogging;
1.85 +}
1.86 +
1.87 +void
1.88 +G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field,
1.89 + oop new_val) {
1.90 + jbyte* byte = byte_for(field);
1.91 + if (*byte != dirty_card) {
1.92 + *byte = dirty_card;
1.93 + Thread* thr = Thread::current();
1.94 + if (thr->is_Java_thread()) {
1.95 + JavaThread* jt = (JavaThread*)thr;
1.96 + jt->dirty_card_queue().enqueue(byte);
1.97 + } else {
1.98 + MutexLockerEx x(Shared_DirtyCardQ_lock,
1.99 + Mutex::_no_safepoint_check_flag);
1.100 + _dcqs.shared_dirty_card_queue()->enqueue(byte);
1.101 + }
1.102 + }
1.103 +}
1.104 +
1.105 +void
1.106 +G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field,
1.107 + oop new_val) {
1.108 + uintptr_t field_uint = (uintptr_t)field;
1.109 + uintptr_t new_val_uint = (uintptr_t)new_val;
1.110 + uintptr_t comb = field_uint ^ new_val_uint;
1.111 + comb = comb >> HeapRegion::LogOfHRGrainBytes;
1.112 + if (comb == 0) return;
1.113 + if (new_val == NULL) return;
1.114 + // Otherwise, log it.
1.115 + G1SATBCardTableLoggingModRefBS* g1_bs =
1.116 + (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set();
1.117 + g1_bs->write_ref_field_work(field, new_val);
1.118 +}
1.119 +
1.120 +void
1.121 +G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) {
1.122 + jbyte* byte = byte_for(mr.start());
1.123 + jbyte* last_byte = byte_for(mr.last());
1.124 + Thread* thr = Thread::current();
1.125 + if (whole_heap) {
1.126 + while (byte <= last_byte) {
1.127 + *byte = dirty_card;
1.128 + byte++;
1.129 + }
1.130 + } else {
1.131 + // Enqueue if necessary.
1.132 + if (thr->is_Java_thread()) {
1.133 + JavaThread* jt = (JavaThread*)thr;
1.134 + while (byte <= last_byte) {
1.135 + if (*byte != dirty_card) {
1.136 + *byte = dirty_card;
1.137 + jt->dirty_card_queue().enqueue(byte);
1.138 + }
1.139 + byte++;
1.140 + }
1.141 + } else {
1.142 + MutexLockerEx x(Shared_DirtyCardQ_lock,
1.143 + Mutex::_no_safepoint_check_flag);
1.144 + while (byte <= last_byte) {
1.145 + if (*byte != dirty_card) {
1.146 + *byte = dirty_card;
1.147 + _dcqs.shared_dirty_card_queue()->enqueue(byte);
1.148 + }
1.149 + byte++;
1.150 + }
1.151 + }
1.152 + }
1.153 +}
