Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/shared/markSweep.inline.hpp @ 8039:5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
Summary: In do_marking_step(), we should always give up current region after scanning the object, if the region is humongous.
Reviewed-by: brutisso, jwilhelm, tamao
author | johnc |
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date | Mon, 11 Feb 2013 15:24:48 -0800 |
parents | b735136e0d82 |
children | db9981fd3124 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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_SHARED_MARKSWEEP_INLINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP | |
27 | |
28 #include "gc_implementation/shared/markSweep.hpp" | |
29 #include "gc_interface/collectedHeap.hpp" | |
30 #include "utilities/stack.inline.hpp" | |
31 #ifndef SERIALGC | |
32 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
33 #endif | |
34 | |
0 | 35 inline void MarkSweep::mark_object(oop obj) { |
36 // some marks may contain information we need to preserve so we store them away | |
37 // and overwrite the mark. We'll restore it at the end of markSweep. | |
38 markOop mark = obj->mark(); | |
39 obj->set_mark(markOopDesc::prototype()->set_marked()); | |
40 | |
41 if (mark->must_be_preserved(obj)) { | |
42 preserve_mark(obj, mark); | |
43 } | |
44 } | |
113
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45 |
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46 template <class T> inline void MarkSweep::follow_root(T* p) { |
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47 assert(!Universe::heap()->is_in_reserved(p), |
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48 "roots shouldn't be things within the heap"); |
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49 T heap_oop = oopDesc::load_heap_oop(p); |
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50 if (!oopDesc::is_null(heap_oop)) { |
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51 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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52 if (!obj->mark()->is_marked()) { |
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53 mark_object(obj); |
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54 obj->follow_contents(); |
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55 } |
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56 } |
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57 follow_stack(); |
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58 } |
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59 |
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60 template <class T> inline void MarkSweep::mark_and_push(T* p) { |
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61 // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); |
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62 T heap_oop = oopDesc::load_heap_oop(p); |
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63 if (!oopDesc::is_null(heap_oop)) { |
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64 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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65 if (!obj->mark()->is_marked()) { |
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66 mark_object(obj); |
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67 _marking_stack.push(obj); |
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68 } |
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69 } |
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70 } |
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71 |
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72 void MarkSweep::push_objarray(oop obj, size_t index) { |
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73 ObjArrayTask task(obj, index); |
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74 assert(task.is_valid(), "bad ObjArrayTask"); |
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75 _objarray_stack.push(task); |
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76 } |
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77 |
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78 template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) { |
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79 T heap_oop = oopDesc::load_heap_oop(p); |
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80 if (!oopDesc::is_null(heap_oop)) { |
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81 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
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82 oop new_obj = oop(obj->mark()->decode_pointer()); |
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83 assert(new_obj != NULL || // is forwarding ptr? |
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84 obj->mark() == markOopDesc::prototype() || // not gc marked? |
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85 (UseBiasedLocking && obj->mark()->has_bias_pattern()), |
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86 // not gc marked? |
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87 "should be forwarded"); |
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88 if (new_obj != NULL) { |
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89 assert(Universe::heap()->is_in_reserved(new_obj), |
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90 "should be in object space"); |
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91 oopDesc::encode_store_heap_oop_not_null(p, new_obj); |
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92 } |
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93 } |
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94 } |
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95 |
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96 template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) { |
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97 mark_and_push(p); |
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98 } |
1972 | 99 |
100 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP |