Mercurial > hg > truffle
annotate src/share/vm/memory/genOopClosures.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 37f87013dfd8 |
| rev | line source |
|---|---|
| 0 | 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 inline OopsInGenClosure::OopsInGenClosure(Generation* gen) : | |
| 26 OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { | |
| 27 set_generation(gen); | |
| 28 } | |
| 29 | |
| 30 inline void OopsInGenClosure::set_generation(Generation* gen) { | |
| 31 _gen = gen; | |
| 32 _gen_boundary = _gen->reserved().start(); | |
| 33 // Barrier set for the heap, must be set after heap is initialized | |
| 34 if (_rs == NULL) { | |
| 35 GenRemSet* rs = SharedHeap::heap()->rem_set(); | |
| 36 assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind"); | |
| 37 _rs = (CardTableRS*)rs; | |
| 38 } | |
| 39 } | |
| 40 | |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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41 template <class T> inline void OopsInGenClosure::do_barrier(T* p) { |
| 0 | 42 assert(generation()->is_in_reserved(p), "expected ref in generation"); |
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43 assert(!oopDesc::is_null(*p), "expected non-null object"); |
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44 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
| 0 | 45 // If p points to a younger generation, mark the card. |
| 46 if ((HeapWord*)obj < _gen_boundary) { | |
| 47 _rs->inline_write_ref_field_gc(p, obj); | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 // NOTE! Any changes made here should also be made | |
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52 // in FastScanClosure::do_oop_work() |
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53 template <class T> inline void ScanClosure::do_oop_work(T* p) { |
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54 T heap_oop = oopDesc::load_heap_oop(p); |
| 0 | 55 // Should we copy the obj? |
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56 if (!oopDesc::is_null(heap_oop)) { |
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57 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
| 0 | 58 if ((HeapWord*)obj < _boundary) { |
| 59 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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60 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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61 : _g->copy_to_survivor_space(obj); |
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62 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
| 0 | 63 } |
| 64 if (_gc_barrier) { | |
| 65 // Now call parent closure | |
| 66 do_barrier(p); | |
| 67 } | |
| 68 } | |
| 69 } | |
| 70 | |
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71 inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop_work(p); } |
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72 inline void ScanClosure::do_oop_nv(narrowOop* p) { ScanClosure::do_oop_work(p); } |
| 0 | 73 |
| 74 // NOTE! Any changes made here should also be made | |
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75 // in ScanClosure::do_oop_work() |
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76 template <class T> inline void FastScanClosure::do_oop_work(T* p) { |
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77 T heap_oop = oopDesc::load_heap_oop(p); |
| 0 | 78 // Should we copy the obj? |
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79 if (!oopDesc::is_null(heap_oop)) { |
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80 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
| 0 | 81 if ((HeapWord*)obj < _boundary) { |
| 82 assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); | |
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83 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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84 : _g->copy_to_survivor_space(obj); |
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85 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
| 0 | 86 if (_gc_barrier) { |
| 87 // Now call parent closure | |
| 88 do_barrier(p); | |
| 89 } | |
| 90 } | |
| 91 } | |
| 92 } | |
| 93 | |
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94 inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop_work(p); } |
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95 inline void FastScanClosure::do_oop_nv(narrowOop* p) { FastScanClosure::do_oop_work(p); } |
| 0 | 96 |
| 97 // Note similarity to ScanClosure; the difference is that | |
| 98 // the barrier set is taken care of outside this closure. | |
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99 template <class T> inline void ScanWeakRefClosure::do_oop_work(T* p) { |
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100 assert(!oopDesc::is_null(*p), "null weak reference?"); |
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101 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
| 0 | 102 // weak references are sometimes scanned twice; must check |
| 103 // that to-space doesn't already contain this object | |
| 104 if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { | |
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105 oop new_obj = obj->is_forwarded() ? obj->forwardee() |
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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106 : _g->copy_to_survivor_space(obj); |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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107 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
| 0 | 108 } |
| 109 } | |
| 110 | |
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111 inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop_work(p); } |
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ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
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112 inline void ScanWeakRefClosure::do_oop_nv(narrowOop* p) { ScanWeakRefClosure::do_oop_work(p); } |