Mercurial > hg > truffle
annotate src/share/vm/memory/genRemSet.hpp @ 12146:9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
Summary: declare all user-defined operator new()s within Hotspot code with the empty throw() exception specification
Reviewed-by: coleenp, twisti, dholmes, hseigel, dcubed, kvn, ccheung
Contributed-by: lois.foltan@oracle.com
| author | coleenp |
|---|---|
| date | Thu, 29 Aug 2013 18:56:29 -0400 |
| parents | bd902affe102 |
| children | de6a9e811145 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
2 * Copyright (c) 2001, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
356
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
356
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
356
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_MEMORY_GENREMSET_HPP |
| 26 #define SHARE_VM_MEMORY_GENREMSET_HPP | |
| 27 | |
| 28 #include "oops/oop.hpp" | |
| 29 | |
| 0 | 30 // A GenRemSet provides ways of iterating over pointers accross generations. |
| 31 // (This is especially useful for older-to-younger.) | |
| 32 | |
| 33 class Generation; | |
| 34 class BarrierSet; | |
| 35 class OopsInGenClosure; | |
| 36 class CardTableRS; | |
| 37 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
38 // Helper to remember modified oops in all klasses. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
39 class KlassRemSet { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
40 bool _accumulate_modified_oops; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
41 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
42 KlassRemSet() : _accumulate_modified_oops(false) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
43 void set_accumulate_modified_oops(bool value) { _accumulate_modified_oops = value; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
44 bool accumulate_modified_oops() { return _accumulate_modified_oops; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
45 bool mod_union_is_clear(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
46 void clear_mod_union(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
47 }; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
48 |
| 6197 | 49 class GenRemSet: public CHeapObj<mtGC> { |
| 0 | 50 friend class Generation; |
| 51 | |
| 52 BarrierSet* _bs; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
53 KlassRemSet _klass_rem_set; |
| 0 | 54 |
| 55 public: | |
| 56 enum Name { | |
| 57 CardTable, | |
| 58 Other | |
| 59 }; | |
| 60 | |
| 61 GenRemSet(BarrierSet * bs) : _bs(bs) {} | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
62 GenRemSet() : _bs(NULL) {} |
| 0 | 63 |
| 64 virtual Name rs_kind() = 0; | |
| 65 | |
| 66 // These are for dynamic downcasts. Unfortunately that it names the | |
| 67 // possible subtypes (but not that they are subtypes!) Return NULL if | |
| 68 // the cast is invalide. | |
| 69 virtual CardTableRS* as_CardTableRS() { return NULL; } | |
| 70 | |
| 71 // Return the barrier set associated with "this." | |
| 72 BarrierSet* bs() { return _bs; } | |
| 73 | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
74 // Set the barrier set. |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
75 void set_bs(BarrierSet* bs) { _bs = bs; } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
76 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
77 KlassRemSet* klass_rem_set() { return &_klass_rem_set; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6197
diff
changeset
|
78 |
| 0 | 79 // Do any (sequential) processing necessary to prepare for (possibly |
| 80 // "parallel", if that arg is true) calls to younger_refs_iterate. | |
| 81 virtual void prepare_for_younger_refs_iterate(bool parallel) = 0; | |
| 82 | |
| 83 // Apply the "do_oop" method of "blk" to (exactly) all oop locations | |
| 84 // 1) that are in objects allocated in "g" at the time of the last call | |
| 85 // to "save_Marks", and | |
| 86 // 2) that point to objects in younger generations. | |
| 87 virtual void younger_refs_iterate(Generation* g, OopsInGenClosure* blk) = 0; | |
| 88 | |
| 89 virtual void younger_refs_in_space_iterate(Space* sp, | |
| 90 OopsInGenClosure* cl) = 0; | |
| 91 | |
| 92 // This method is used to notify the remembered set that "new_val" has | |
| 93 // been written into "field" by the garbage collector. | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
6
diff
changeset
|
94 void write_ref_field_gc(void* field, oop new_val); |
| 0 | 95 protected: |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
6
diff
changeset
|
96 virtual void write_ref_field_gc_work(void* field, oop new_val) = 0; |
| 0 | 97 public: |
| 98 | |
| 99 // A version of the above suitable for use by parallel collectors. | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
6
diff
changeset
|
100 virtual void write_ref_field_gc_par(void* field, oop new_val) = 0; |
| 0 | 101 |
| 102 // Resize one of the regions covered by the remembered set. | |
| 103 virtual void resize_covered_region(MemRegion new_region) = 0; | |
| 104 | |
| 105 // If the rem set imposes any alignment restrictions on boundaries | |
| 106 // within the heap, this function tells whether they are met. | |
| 107 virtual bool is_aligned(HeapWord* addr) = 0; | |
| 108 | |
| 109 // If the RS (or BS) imposes an aligment constraint on maximum heap size. | |
| 110 // (This must be static, and dispatch on "nm", because it is called | |
| 111 // before an RS is created.) | |
| 112 static uintx max_alignment_constraint(Name nm); | |
| 113 | |
| 114 virtual void verify() = 0; | |
| 115 | |
| 116 // Verify that the remembered set has no entries for | |
|
6
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
117 // the heap interval denoted by mr. If there are any |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
118 // alignment constraints on the remembered set, only the |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
119 // part of the region that is aligned is checked. |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
120 // |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
121 // alignment boundaries |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
122 // +--------+-------+--------+-------+ |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
123 // [ region mr ) |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
124 // [ part checked ) |
|
73e96e5c30df
6624765: Guarantee failure "Unexpected dirty card found"
jmasa
parents:
0
diff
changeset
|
125 virtual void verify_aligned_region_empty(MemRegion mr) = 0; |
| 0 | 126 |
| 127 // If appropriate, print some information about the remset on "tty". | |
| 128 virtual void print() {} | |
| 129 | |
| 130 // Informs the RS that the given memregion contains no references to | |
| 131 // younger generations. | |
| 132 virtual void clear(MemRegion mr) = 0; | |
| 133 | |
| 134 // Informs the RS that there are no references to generations | |
| 135 // younger than gen from generations gen and older. | |
| 136 // The parameter clear_perm indicates if the perm_gen's | |
| 137 // remembered set should also be processed/cleared. | |
|
12033
bd902affe102
8023021: Unnecessary clearing of the card table introduced by the fix for JDK-8023013
brutisso
parents:
12030
diff
changeset
|
138 virtual void clear_into_younger(Generation* old_gen) = 0; |
| 0 | 139 |
| 140 // Informs the RS that refs in the given "mr" may have changed | |
| 141 // arbitrarily, and therefore may contain old-to-young pointers. | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
142 // If "whole heap" is true, then this invalidation is part of an |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
143 // invalidation of the whole heap, which an implementation might |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
144 // handle differently than that of a sub-part of the heap. |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
145 virtual void invalidate(MemRegion mr, bool whole_heap = false) = 0; |
| 0 | 146 |
| 147 // Informs the RS that refs in this generation | |
| 148 // may have changed arbitrarily, and therefore may contain | |
|
12030
330dfb0476f4
8022800: Use specific generations rather than generation iteration
brutisso
parents:
6725
diff
changeset
|
149 // old-to-young pointers in arbitrary locations. |
|
12033
bd902affe102
8023021: Unnecessary clearing of the card table introduced by the fix for JDK-8023013
brutisso
parents:
12030
diff
changeset
|
150 virtual void invalidate_or_clear(Generation* old_gen) = 0; |
| 0 | 151 }; |
| 1972 | 152 |
| 153 #endif // SHARE_VM_MEMORY_GENREMSET_HPP |