Mercurial > hg > graal-compiler
annotate src/share/vm/oops/objArrayKlass.hpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
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date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * This code is free software; you can redistribute it and/or modify it | |
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7 * published by the Free Software Foundation. | |
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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 | |
25 // objArrayKlass is the klass for objArrays | |
26 | |
27 class objArrayKlass : public arrayKlass { | |
28 friend class VMStructs; | |
29 private: | |
30 klassOop _element_klass; // The klass of the elements of this array type | |
31 klassOop _bottom_klass; // The one-dimensional type (instanceKlass or typeArrayKlass) | |
32 public: | |
33 // Instance variables | |
34 klassOop element_klass() const { return _element_klass; } | |
35 void set_element_klass(klassOop k) { oop_store_without_check((oop*) &_element_klass, (oop) k); } | |
36 oop* element_klass_addr() { return (oop*)&_element_klass; } | |
37 | |
38 klassOop bottom_klass() const { return _bottom_klass; } | |
39 void set_bottom_klass(klassOop k) { oop_store_without_check((oop*) &_bottom_klass, (oop) k); } | |
40 oop* bottom_klass_addr() { return (oop*)&_bottom_klass; } | |
41 | |
42 // Compiler/Interpreter offset | |
43 static int element_klass_offset_in_bytes() { return offset_of(objArrayKlass, _element_klass); } | |
44 | |
45 // Dispatched operation | |
46 bool can_be_primary_super_slow() const; | |
47 objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); | |
48 bool compute_is_subtype_of(klassOop k); | |
49 bool oop_is_objArray_slow() const { return true; } | |
50 int oop_size(oop obj) const; | |
51 int klass_oop_size() const { return object_size(); } | |
52 | |
53 // Allocation | |
54 DEFINE_ALLOCATE_PERMANENT(objArrayKlass); | |
55 objArrayOop allocate(int length, TRAPS); | |
56 oop multi_allocate(int rank, jint* sizes, TRAPS); | |
57 | |
58 // Copying | |
59 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); | |
60 | |
61 // Compute protection domain | |
62 oop protection_domain() { return Klass::cast(bottom_klass())->protection_domain(); } | |
63 // Compute class loader | |
64 oop class_loader() const { return Klass::cast(bottom_klass())->class_loader(); } | |
65 | |
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66 private: |
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67 // Either oop or narrowOop depending on UseCompressedOops. |
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68 // must be called from within objArrayKlass.cpp |
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69 template <class T> void do_copy(arrayOop s, T* src, arrayOop d, |
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70 T* dst, int length, TRAPS); |
0 | 71 protected: |
72 // Returns the objArrayKlass for n'th dimension. | |
73 virtual klassOop array_klass_impl(bool or_null, int n, TRAPS); | |
74 | |
75 // Returns the array class with this class as element type. | |
76 virtual klassOop array_klass_impl(bool or_null, TRAPS); | |
77 | |
78 public: | |
79 // Casting from klassOop | |
80 static objArrayKlass* cast(klassOop k) { | |
81 assert(k->klass_part()->oop_is_objArray_slow(), "cast to objArrayKlass"); | |
82 return (objArrayKlass*) k->klass_part(); | |
83 } | |
84 | |
85 // Sizing | |
86 static int header_size() { return oopDesc::header_size() + sizeof(objArrayKlass)/HeapWordSize; } | |
87 int object_size() const { return arrayKlass::object_size(header_size()); } | |
88 | |
89 // Initialization (virtual from Klass) | |
90 void initialize(TRAPS); | |
91 | |
92 // Garbage collection | |
93 void oop_follow_contents(oop obj); | |
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94 inline void oop_follow_contents(oop obj, int index); |
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95 template <class T> inline void objarray_follow_contents(oop obj, int index); |
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96 |
0 | 97 int oop_adjust_pointers(oop obj); |
98 | |
99 // Parallel Scavenge and Parallel Old | |
100 PARALLEL_GC_DECLS | |
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101 #ifndef SERIALGC |
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102 inline void oop_follow_contents(ParCompactionManager* cm, oop obj, int index); |
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103 template <class T> inline void |
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104 objarray_follow_contents(ParCompactionManager* cm, oop obj, int index); |
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105 #endif // !SERIALGC |
0 | 106 |
107 // Iterators | |
108 int oop_oop_iterate(oop obj, OopClosure* blk) { | |
109 return oop_oop_iterate_v(obj, blk); | |
110 } | |
111 int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
112 return oop_oop_iterate_v_m(obj, blk, mr); | |
113 } | |
114 #define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ | |
115 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ | |
116 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ | |
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117 MemRegion mr); \ |
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118 int oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* blk, \ |
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119 int start, int end); |
0 | 120 |
121 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL) | |
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122 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DECL) |
0 | 123 |
124 // JVM support | |
125 jint compute_modifier_flags(TRAPS) const; | |
126 | |
127 private: | |
128 static klassOop array_klass_impl (objArrayKlassHandle this_oop, bool or_null, int n, TRAPS); | |
129 | |
130 public: | |
131 // Printing | |
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132 void oop_print_value_on(oop obj, outputStream* st); |
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133 #ifndef PRODUCT |
0 | 134 void oop_print_on (oop obj, outputStream* st); |
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135 #endif //PRODUCT |
0 | 136 |
137 // Verification | |
138 const char* internal_name() const; | |
139 void oop_verify_on(oop obj, outputStream* st); | |
140 void oop_verify_old_oop(oop obj, oop* p, bool allow_dirty); | |
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141 void oop_verify_old_oop(oop obj, narrowOop* p, bool allow_dirty); |
0 | 142 }; |