Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.cpp @ 845:df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
| author | ysr |
|---|---|
| date | Tue, 14 Jul 2009 15:40:39 -0700 |
| parents | 37f87013dfd8 |
| children | d4197f8d516a |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_g1SATBCardTableModRefBS.cpp.incl" | |
| 27 | |
| 28 G1SATBCardTableModRefBS::G1SATBCardTableModRefBS(MemRegion whole_heap, | |
| 29 int max_covered_regions) : | |
| 30 CardTableModRefBSForCTRS(whole_heap, max_covered_regions) | |
| 31 { | |
| 32 _kind = G1SATBCT; | |
| 33 } | |
| 34 | |
| 35 | |
| 36 void G1SATBCardTableModRefBS::enqueue(oop pre_val) { | |
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37 assert(pre_val->is_oop_or_null(true), "Error"); |
| 342 | 38 if (!JavaThread::satb_mark_queue_set().active()) return; |
| 39 Thread* thr = Thread::current(); | |
| 40 if (thr->is_Java_thread()) { | |
| 41 JavaThread* jt = (JavaThread*)thr; | |
| 42 jt->satb_mark_queue().enqueue(pre_val); | |
| 43 } else { | |
| 44 MutexLocker x(Shared_SATB_Q_lock); | |
| 45 JavaThread::satb_mark_queue_set().shared_satb_queue()->enqueue(pre_val); | |
| 46 } | |
| 47 } | |
| 48 | |
| 49 // When we know the current java thread: | |
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50 template <class T> void |
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51 G1SATBCardTableModRefBS::write_ref_field_pre_static(T* field, |
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52 oop new_val, |
| 342 | 53 JavaThread* jt) { |
| 54 if (!JavaThread::satb_mark_queue_set().active()) return; | |
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55 T heap_oop = oopDesc::load_heap_oop(field); |
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56 if (!oopDesc::is_null(heap_oop)) { |
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57 oop pre_val = oopDesc::decode_heap_oop_not_null(heap_oop); |
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58 assert(pre_val->is_oop(true /* ignore mark word */), "Error"); |
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59 jt->satb_mark_queue().enqueue(pre_val); |
| 342 | 60 } |
| 61 } | |
| 62 | |
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63 template <class T> void |
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64 G1SATBCardTableModRefBS::write_ref_array_pre_work(T* dst, int count) { |
| 342 | 65 if (!JavaThread::satb_mark_queue_set().active()) return; |
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66 T* elem_ptr = dst; |
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67 for (int i = 0; i < count; i++, elem_ptr++) { |
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68 T heap_oop = oopDesc::load_heap_oop(elem_ptr); |
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69 if (!oopDesc::is_null(heap_oop)) { |
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70 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop)); |
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71 } |
| 342 | 72 } |
| 73 } | |
| 74 | |
| 75 G1SATBCardTableLoggingModRefBS:: | |
| 76 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, | |
| 77 int max_covered_regions) : | |
| 78 G1SATBCardTableModRefBS(whole_heap, max_covered_regions), | |
| 79 _dcqs(JavaThread::dirty_card_queue_set()) | |
| 80 { | |
| 81 _kind = G1SATBCTLogging; | |
| 82 } | |
| 83 | |
| 84 void | |
| 85 G1SATBCardTableLoggingModRefBS::write_ref_field_work(void* field, | |
| 86 oop new_val) { | |
| 87 jbyte* byte = byte_for(field); | |
| 88 if (*byte != dirty_card) { | |
| 89 *byte = dirty_card; | |
| 90 Thread* thr = Thread::current(); | |
| 91 if (thr->is_Java_thread()) { | |
| 92 JavaThread* jt = (JavaThread*)thr; | |
| 93 jt->dirty_card_queue().enqueue(byte); | |
| 94 } else { | |
| 95 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
| 96 Mutex::_no_safepoint_check_flag); | |
| 97 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
| 98 } | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 void | |
| 103 G1SATBCardTableLoggingModRefBS::write_ref_field_static(void* field, | |
| 104 oop new_val) { | |
| 105 uintptr_t field_uint = (uintptr_t)field; | |
| 106 uintptr_t new_val_uint = (uintptr_t)new_val; | |
| 107 uintptr_t comb = field_uint ^ new_val_uint; | |
| 108 comb = comb >> HeapRegion::LogOfHRGrainBytes; | |
| 109 if (comb == 0) return; | |
| 110 if (new_val == NULL) return; | |
| 111 // Otherwise, log it. | |
| 112 G1SATBCardTableLoggingModRefBS* g1_bs = | |
| 113 (G1SATBCardTableLoggingModRefBS*)Universe::heap()->barrier_set(); | |
| 114 g1_bs->write_ref_field_work(field, new_val); | |
| 115 } | |
| 116 | |
| 117 void | |
| 118 G1SATBCardTableLoggingModRefBS::invalidate(MemRegion mr, bool whole_heap) { | |
| 119 jbyte* byte = byte_for(mr.start()); | |
| 120 jbyte* last_byte = byte_for(mr.last()); | |
| 121 Thread* thr = Thread::current(); | |
| 122 if (whole_heap) { | |
| 123 while (byte <= last_byte) { | |
| 124 *byte = dirty_card; | |
| 125 byte++; | |
| 126 } | |
| 127 } else { | |
| 128 // Enqueue if necessary. | |
| 129 if (thr->is_Java_thread()) { | |
| 130 JavaThread* jt = (JavaThread*)thr; | |
| 131 while (byte <= last_byte) { | |
| 132 if (*byte != dirty_card) { | |
| 133 *byte = dirty_card; | |
| 134 jt->dirty_card_queue().enqueue(byte); | |
| 135 } | |
| 136 byte++; | |
| 137 } | |
| 138 } else { | |
| 139 MutexLockerEx x(Shared_DirtyCardQ_lock, | |
| 140 Mutex::_no_safepoint_check_flag); | |
| 141 while (byte <= last_byte) { | |
| 142 if (*byte != dirty_card) { | |
| 143 *byte = dirty_card; | |
| 144 _dcqs.shared_dirty_card_queue()->enqueue(byte); | |
| 145 } | |
| 146 byte++; | |
| 147 } | |
| 148 } | |
| 149 } | |
| 150 } |