Mercurial > hg > truffle
annotate src/share/vm/oops/oop.pcgc.inline.hpp @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
| author | coleenp |
|---|---|
| date | Sun, 13 Apr 2008 17:43:42 -0400 |
| parents | a61af66fc99e |
| children | d1605aabd0a1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 2005-2007 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 inline void oopDesc::update_contents(ParCompactionManager* cm) { | |
| 26 // The klass field must be updated before anything else | |
| 27 // can be done. | |
| 28 DEBUG_ONLY(klassOopDesc* original_klass = klass()); | |
| 29 | |
| 30 // Can the option to update and/or copy be moved up in the | |
| 31 // call chain to avoid calling into here? | |
| 32 | |
| 33 if (PSParallelCompact::should_update_klass(klass())) { | |
| 34 update_header(); | |
| 35 assert(klass()->is_klass(), "Not updated correctly"); | |
| 36 } else { | |
| 37 assert(klass()->is_klass(), "Not updated"); | |
| 38 } | |
| 39 | |
| 40 Klass* new_klass = blueprint(); | |
| 41 if (!new_klass->oop_is_typeArray()) { | |
| 42 // It might contain oops beyond the header, so take the virtual call. | |
| 43 new_klass->oop_update_pointers(cm, this); | |
| 44 } | |
| 45 // Else skip it. The typeArrayKlass in the header never needs scavenging. | |
| 46 } | |
| 47 | |
| 48 inline void oopDesc::update_contents(ParCompactionManager* cm, | |
| 49 HeapWord* begin_limit, | |
| 50 HeapWord* end_limit) { | |
| 51 // The klass field must be updated before anything else | |
| 52 // can be done. | |
| 53 debug_only(klassOopDesc* original_klass = klass()); | |
| 54 | |
| 55 update_contents(cm, klass(), begin_limit, end_limit); | |
| 56 } | |
| 57 | |
| 58 inline void oopDesc::update_contents(ParCompactionManager* cm, | |
| 59 klassOop old_klass, | |
| 60 HeapWord* begin_limit, | |
| 61 HeapWord* end_limit) { | |
| 62 | |
| 63 klassOop updated_klass = | |
| 64 PSParallelCompact::summary_data().calc_new_klass(old_klass); | |
| 65 | |
| 66 // Needs to be boundary aware for the 64 bit case | |
| 67 // update_header(); | |
| 68 // The klass has moved. Is the location of the klass | |
| 69 // within the limits? | |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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70 if ((((HeapWord*)&_metadata._klass) >= begin_limit) && |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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71 (((HeapWord*)&_metadata._klass) < end_limit)) { |
| 0 | 72 set_klass(updated_klass); |
| 73 } | |
| 74 | |
| 75 Klass* klass = updated_klass->klass_part(); | |
| 76 if (!klass->oop_is_typeArray()) { | |
| 77 // It might contain oops beyond the header, so take the virtual call. | |
| 78 klass->oop_update_pointers(cm, this, begin_limit, end_limit); | |
| 79 } | |
| 80 // Else skip it. The typeArrayKlass in the header never needs scavenging. | |
| 81 } | |
| 82 | |
| 83 inline void oopDesc::follow_contents(ParCompactionManager* cm) { | |
| 84 assert (PSParallelCompact::mark_bitmap()->is_marked(this), | |
| 85 "should be marked"); | |
| 86 blueprint()->oop_follow_contents(cm, this); | |
| 87 } | |
| 88 | |
| 89 // Used by parallel old GC. | |
| 90 | |
| 91 inline void oopDesc::follow_header(ParCompactionManager* cm) { | |
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92 if (UseCompressedOops) { |
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93 PSParallelCompact::mark_and_push(cm, compressed_klass_addr()); |
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94 } else { |
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95 PSParallelCompact::mark_and_push(cm, klass_addr()); |
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96 } |
| 0 | 97 } |
| 98 | |
| 99 inline oop oopDesc::forward_to_atomic(oop p) { | |
| 100 assert(ParNewGeneration::is_legal_forward_ptr(p), | |
| 101 "illegal forwarding pointer value."); | |
| 102 markOop oldMark = mark(); | |
| 103 markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); | |
| 104 markOop curMark; | |
| 105 | |
| 106 assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); | |
| 107 assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); | |
| 108 | |
| 109 while (!is_forwarded()) { | |
| 110 curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); | |
| 111 if (curMark == oldMark) { | |
| 112 assert(is_forwarded(), "the CAS should have succeeded."); | |
| 113 return NULL; | |
| 114 } | |
| 115 oldMark = curMark; | |
| 116 } | |
| 117 return forwardee(); | |
| 118 } | |
| 119 | |
| 120 inline void oopDesc::update_header() { | |
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121 if (UseCompressedOops) { |
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122 PSParallelCompact::adjust_pointer(compressed_klass_addr()); |
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123 } else { |
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124 PSParallelCompact::adjust_pointer(klass_addr()); |
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125 } |
| 0 | 126 } |
| 127 | |
| 128 inline void oopDesc::update_header(HeapWord* beg_addr, HeapWord* end_addr) { | |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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129 if (UseCompressedOops) { |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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130 PSParallelCompact::adjust_pointer(compressed_klass_addr(), |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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131 beg_addr, end_addr); |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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132 } else { |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
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133 PSParallelCompact::adjust_pointer(klass_addr(), beg_addr, end_addr); |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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134 } |
| 0 | 135 } |