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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
author trims
date Thu, 27 May 2010 19:08:38 -0700
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1 /*
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2 * Copyright (c) 2001, 2007, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 /*
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26 * This really ought to be an inline function, but apparently the C++
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27 * compiler sometimes sees fit to ignore inline declarations. Sigh.
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28 */
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29
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30 // This must a ifdef'ed because the counting it controls is in a
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31 // perf-critical inner loop.
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32 #define FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT 0
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33
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34 template <class T> inline void FilterIntoCSClosure::do_oop_nv(T* p) {
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35 T heap_oop = oopDesc::load_heap_oop(p);
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36 if (!oopDesc::is_null(heap_oop) &&
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37 _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) {
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38 _oc->do_oop(p);
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39 #if FILTERINTOCSCLOSURE_DOHISTOGRAMCOUNT
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40 _dcto_cl->incr_count();
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41 #endif
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42 }
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43 }
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44
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45 #define FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT 0
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46
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47 template <class T> inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {
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48 T heap_oop = oopDesc::load_heap_oop(p);
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49 if (!oopDesc::is_null(heap_oop)) {
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50 HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);
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51 if (obj_hw < _r_bottom || obj_hw >= _r_end) {
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52 _oc->do_oop(p);
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53 #if FILTEROUTOFREGIONCLOSURE_DOHISTOGRAMCOUNT
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54 _out_of_region++;
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55 #endif
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56 }
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57 }
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58 }
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59
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60 template <class T> inline void FilterInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {
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61 T heap_oop = oopDesc::load_heap_oop(p);
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62 if (!oopDesc::is_null(heap_oop) &&
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63 _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop)))
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64 _oc->do_oop(p);
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65 }
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66
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67 template <class T> inline void FilterAndMarkInHeapRegionAndIntoCSClosure::do_oop_nv(T* p) {
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68 T heap_oop = oopDesc::load_heap_oop(p);
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69 if (!oopDesc::is_null(heap_oop)) {
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70 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
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71 HeapRegion* hr = _g1->heap_region_containing((HeapWord*) obj);
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72 if (hr != NULL) {
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73 if (hr->in_collection_set())
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74 _oc->do_oop(p);
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75 else if (!hr->is_young())
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76 _cm->grayRoot(obj);
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77 }
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78 }
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79 }
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80
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81 // This closure is applied to the fields of the objects that have just been copied.
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82 template <class T> inline void G1ParScanClosure::do_oop_nv(T* p) {
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83 T heap_oop = oopDesc::load_heap_oop(p);
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84
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85 if (!oopDesc::is_null(heap_oop)) {
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86 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
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87 if (_g1->in_cset_fast_test(obj)) {
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88 // We're not going to even bother checking whether the object is
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89 // already forwarded or not, as this usually causes an immediate
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90 // stall. We'll try to prefetch the object (for write, given that
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91 // we might need to install the forwarding reference) and we'll
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92 // get back to it when pop it from the queue
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93 Prefetch::write(obj->mark_addr(), 0);
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94 Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
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95
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96 // slightly paranoid test; I'm trying to catch potential
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97 // problems before we go into push_on_queue to know where the
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98 // problem is coming from
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99 assert(obj == oopDesc::load_decode_heap_oop(p),
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100 "p should still be pointing to obj");
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101 _par_scan_state->push_on_queue(p);
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102 } else {
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103 _par_scan_state->update_rs(_from, p, _par_scan_state->queue_num());
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104 }
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105 }
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106 }
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107
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108 template <class T> inline void G1ParPushHeapRSClosure::do_oop_nv(T* p) {
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109 T heap_oop = oopDesc::load_heap_oop(p);
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110
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111 if (!oopDesc::is_null(heap_oop)) {
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112 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
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113 if (_g1->in_cset_fast_test(obj)) {
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114 Prefetch::write(obj->mark_addr(), 0);
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115 Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
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116 _par_scan_state->push_on_queue(p);
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117 }
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118 }
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119 }