jdk8-mips64-public/hotspot: comparison src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp

--1:000000000000
+:f90c822e73f8
+/*
+* Copyright (c) 2001, 2013, 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.
+*
+*/
+#include "precompiled.hpp"
+#include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp"
+#include "gc_implementation/g1/heapRegion.hpp"
+#include "gc_implementation/g1/satbQueue.hpp"
+#include "runtime/mutexLocker.hpp"
+#include "runtime/thread.inline.hpp"
+G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap,
+int max_covered_regions) :
+CardTableModRefBSForCTRS(whole_heap, max_covered_regions)
+{
+_kind = G1SATBCT;
+}
+void G1SATBCardTableModRefBS::enqueue(oop pre_val) {
+// Nulls should have been already filtered.
+assert(pre_val->is_oop(true), "Error");
+if (!JavaThread::satb_mark_queue_set().is_active()) return;
+Thread* thr = Thread::current();
+if (thr->is_Java_thread()) {
+JavaThread* jt = (JavaThread*)thr;
+jt->satb_mark_queue().enqueue(pre_val);
+} else {
+MutexLockerEx x(Shared_SATB_Q_lock, Mutex::_no_safepoint_check_flag);
+JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val);
+}
+}
+template <class T> void
+G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) {
+if (!JavaThread::satb_mark_queue_set().is_active()) return;
+T* elem_ptr = dst;
+for (int i = 0; i < count; i++, elem_ptr++) {
+T heap_oop = oopDesc::load_heap_oop(elem_ptr);
+if (!oopDesc::is_null(heap_oop)) {
+enqueue(oopDesc::decode_heap_oop_not_null(heap_oop));
+}
+}
+}
+bool G1SATBCardTableModRefBS::mark_card_deferred(size_t card_index) {
+jbyte val = _byte_map[card_index];
+// It's already processed
+if ((val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val()) {
+return false;
+}
+if  (val == g1_young_gen) {
+// the card is for a young gen region. We don't need to keep track of all pointers into young
+return false;
+}
+// Cached bit can be installed either on a clean card or on a claimed card.
+jbyte new_val = val;
+if (val == clean_card_val()) {
+new_val = (jbyte)deferred_card_val();
+} else {
+if (val & claimed_card_val()) {
+new_val = val | (jbyte)deferred_card_val();
+}
+}
+if (new_val != val) {
+Atomic::cmpxchg(new_val, &_byte_map[card_index], val);
+}
+return true;
+}
+void G1SATBCardTableModRefBS::g1_mark_as_young(const MemRegion& mr) {
+jbyte *const first = byte_for(mr.start());
+jbyte *const last = byte_after(mr.last());
+// Below we may use an explicit loop instead of memset() because on
+// certain platforms memset() can give concurrent readers phantom zeros.
+if (UseMemSetInBOT) {
+memset(first, g1_young_gen, last - first);
+} else {
+for (jbyte* i = first; i < last; i++) {
+*i = g1_young_gen;
+}
+}
+}
+#ifndef PRODUCT
+void G1SATBCardTableModRefBS::verify_g1_young_region(MemRegion mr) {
+verify_region(mr, g1_young_gen,  true);
+}
+#endif
+G1SATBCardTableLoggingModRefBS::
+G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,
+int max_covered_regions) :
+G1SATBCardTableModRefBS(whole_heap, max_covered_regions),
+_dcqs(JavaThread::dirty_card_queue_set())
+{
+_kind = G1SATBCTLogging;
+}
+void
+G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field,
+oop new_val,
+bool release) {
+volatile jbyte* byte = byte_for(field);
+if (*byte == g1_young_gen) {
+return;
+}
+OrderAccess::storeload();
+if (*byte != dirty_card) {
+*byte = dirty_card;
+Thread* thr = Thread::current();
+if (thr->is_Java_thread()) {
+JavaThread* jt = (JavaThread*)thr;
+jt->dirty_card_queue().enqueue(byte);
+} else {
+MutexLockerEx x(Shared_DirtyCardQ_lock,
+Mutex::_no_safepoint_check_flag);
+_dcqs.shared_dirty_card_queue()->enqueue(byte);
+}
+}
+}
+void
+G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field,
+oop new_val) {
+uintptr_t field_uint = (uintptr_t)field;
+uintptr_t new_val_uint = cast_from_oop<uintptr_t>(new_val);
+uintptr_t comb = field_uint ^ new_val_uint;
+comb = comb >> HeapRegion::LogOfHRGrainBytes;
+if (comb == 0) return;
+if (new_val == NULL) return;
+// Otherwise, log it.
+G1SATBCardTableLoggingModRefBS* g1_bs =
+(G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set();
+g1_bs->write_ref_field_work(field, new_val);
+}
+void
+G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) {
+volatile jbyte* byte = byte_for(mr.start());
+jbyte* last_byte = byte_for(mr.last());
+Thread* thr = Thread::current();
+if (whole_heap) {
+while (byte <= last_byte) {
+*byte = dirty_card;
+byte++;
+}
+} else {
+// skip all consecutive young cards
+for (; byte <= last_byte && *byte == g1_young_gen; byte++);
+if (byte <= last_byte) {
+OrderAccess::storeload();
+// Enqueue if necessary.
+if (thr->is_Java_thread()) {
+JavaThread* jt = (JavaThread*)thr;
+for (; byte <= last_byte; byte++) {
+if (*byte == g1_young_gen) {
+continue;
+}
+if (*byte != dirty_card) {
+*byte = dirty_card;
+jt->dirty_card_queue().enqueue(byte);
+}
+}
+} else {
+MutexLockerEx x(Shared_DirtyCardQ_lock,
+Mutex::_no_safepoint_check_flag);
+for (; byte <= last_byte; byte++) {
+if (*byte == g1_young_gen) {
+continue;
+}
+if (*byte != dirty_card) {
+*byte = dirty_card;
+_dcqs.shared_dirty_card_queue()->enqueue(byte);
+}
+}
+}
+}
+}
+}

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp

src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp