Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp @ 2951:0c0e407faa39
another fix to debug info (on-stack parameters), DCE removes unnecessary merges and LoopBegins whose LoopEnd went away
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Tue, 14 Jun 2011 16:47:31 +0200 |
parents | 1d1603768966 |
children | 95f6641e38e0 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP | |
27 | |
28 #include "gc_implementation/parallelScavenge/cardTableExtension.hpp" | |
29 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
30 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" | |
31 #include "gc_implementation/parallelScavenge/psScavenge.hpp" | |
32 | |
0 | 33 inline void PSScavenge::save_to_space_top_before_gc() { |
34 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
35 _to_space_top_before_gc = heap->young_gen()->to_space()->top(); | |
36 } | |
37 | |
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38 template <class T> inline bool PSScavenge::should_scavenge(T* p) { |
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39 T heap_oop = oopDesc::load_heap_oop(p); |
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40 if (oopDesc::is_null(heap_oop)) return false; |
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41 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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42 return PSScavenge::is_obj_in_young((HeapWord*)obj); |
0 | 43 } |
44 | |
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45 template <class T> |
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46 inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) { |
0 | 47 if (should_scavenge(p)) { |
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48 oop obj = oopDesc::load_decode_heap_oop_not_null(p); |
0 | 49 // Skip objects copied to to_space since the scavenge started. |
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50 HeapWord* const addr = (HeapWord*)obj; |
0 | 51 return addr < to_space_top_before_gc() || addr >= to_space->end(); |
52 } | |
53 return false; | |
54 } | |
55 | |
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56 template <class T> |
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57 inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) { |
0 | 58 if (check_to_space) { |
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59 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); |
0 | 60 return should_scavenge(p, heap->young_gen()->to_space()); |
61 } | |
62 return should_scavenge(p); | |
63 } | |
64 | |
65 // Attempt to "claim" oop at p via CAS, push the new obj if successful | |
66 // This version tests the oop* to make sure it is within the heap before | |
67 // attempting marking. | |
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68 template <class T> |
0 | 69 inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, |
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70 T* p) { |
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71 assert(should_scavenge(p, true), "revisiting object?"); |
0 | 72 |
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73 oop o = oopDesc::load_decode_heap_oop_not_null(p); |
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74 oop new_obj = o->is_forwarded() |
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75 ? o->forwardee() |
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76 : pm->copy_to_survivor_space(o); |
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77 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
0 | 78 |
79 // We cannot mark without test, as some code passes us pointers | |
80 // that are outside the heap. | |
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81 if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) && |
0 | 82 Universe::heap()->is_in_reserved(p)) { |
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83 if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) { |
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84 card_table()->inline_write_ref_field_gc(p, new_obj); |
0 | 85 } |
86 } | |
87 } | |
1972 | 88 |
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89 class PSScavengeRootsClosure: public OopClosure { |
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90 private: |
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91 PSPromotionManager* _promotion_manager; |
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92 |
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93 protected: |
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94 template <class T> void do_oop_work(T *p) { |
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95 if (PSScavenge::should_scavenge(p)) { |
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96 // We never card mark roots, maybe call a func without test? |
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97 PSScavenge::copy_and_push_safe_barrier(_promotion_manager, p); |
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98 } |
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99 } |
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100 public: |
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101 PSScavengeRootsClosure(PSPromotionManager* pm) : _promotion_manager(pm) { } |
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102 void do_oop(oop* p) { PSScavengeRootsClosure::do_oop_work(p); } |
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103 void do_oop(narrowOop* p) { PSScavengeRootsClosure::do_oop_work(p); } |
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104 }; |
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105 |
1972 | 106 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_INLINE_HPP |