Mercurial > hg > truffle
annotate src/share/vm/oops/typeArrayOop.hpp @ 12169:29aa8936f03c
8023597: Optimize G1 barriers code for unsafe load_store
Summary: Avoid loading old values in G1 pre-barriers for inlined unsafe load_store nodes.
Reviewed-by: kvn, tonyp
Contributed-by: Martin Doerr <martin.doerr@sap.com>
author | kvn |
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date | Wed, 28 Aug 2013 11:22:43 +0200 |
parents | d8ce2825b193 |
children | bdd155477289 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 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_OOPS_TYPEARRAYOOP_HPP |
26 #define SHARE_VM_OOPS_TYPEARRAYOOP_HPP | |
27 | |
28 #include "oops/arrayOop.hpp" | |
29 #include "oops/typeArrayKlass.hpp" | |
30 #ifdef TARGET_OS_ARCH_linux_x86 | |
31 # include "orderAccess_linux_x86.inline.hpp" | |
32 #endif | |
33 #ifdef TARGET_OS_ARCH_linux_sparc | |
34 # include "orderAccess_linux_sparc.inline.hpp" | |
35 #endif | |
36 #ifdef TARGET_OS_ARCH_linux_zero | |
37 # include "orderAccess_linux_zero.inline.hpp" | |
38 #endif | |
39 #ifdef TARGET_OS_ARCH_solaris_x86 | |
40 # include "orderAccess_solaris_x86.inline.hpp" | |
41 #endif | |
42 #ifdef TARGET_OS_ARCH_solaris_sparc | |
43 # include "orderAccess_solaris_sparc.inline.hpp" | |
44 #endif | |
45 #ifdef TARGET_OS_ARCH_windows_x86 | |
46 # include "orderAccess_windows_x86.inline.hpp" | |
47 #endif | |
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48 #ifdef TARGET_OS_ARCH_linux_arm |
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49 # include "orderAccess_linux_arm.inline.hpp" |
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50 #endif |
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51 #ifdef TARGET_OS_ARCH_linux_ppc |
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52 # include "orderAccess_linux_ppc.inline.hpp" |
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53 #endif |
3960 | 54 #ifdef TARGET_OS_ARCH_bsd_x86 |
55 # include "orderAccess_bsd_x86.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_OS_ARCH_bsd_zero | |
58 # include "orderAccess_bsd_zero.inline.hpp" | |
59 #endif | |
1972 | 60 |
0 | 61 // A typeArrayOop is an array containing basic types (non oop elements). |
62 // It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs} | |
63 #include <limits.h> | |
64 | |
65 class typeArrayOopDesc : public arrayOopDesc { | |
66 protected: | |
67 jchar* char_base() const { return (jchar*) base(T_CHAR); } | |
68 jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); } | |
69 jbyte* byte_base() const { return (jbyte*) base(T_BYTE); } | |
70 jint* int_base() const { return (jint*) base(T_INT); } | |
71 jlong* long_base() const { return (jlong*) base(T_LONG); } | |
72 jshort* short_base() const { return (jshort*) base(T_SHORT); } | |
73 jfloat* float_base() const { return (jfloat*) base(T_FLOAT); } | |
74 jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); } | |
75 | |
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76 friend class TypeArrayKlass; |
0 | 77 |
78 public: | |
79 jbyte* byte_at_addr(int which) const { | |
80 assert(is_within_bounds(which), "index out of bounds"); | |
81 return &byte_base()[which]; | |
82 } | |
83 | |
84 jboolean* bool_at_addr(int which) const { | |
85 assert(is_within_bounds(which), "index out of bounds"); | |
86 return &bool_base()[which]; | |
87 } | |
88 | |
89 jchar* char_at_addr(int which) const { | |
90 assert(is_within_bounds(which), "index out of bounds"); | |
91 return &char_base()[which]; | |
92 } | |
93 | |
94 jint* int_at_addr(int which) const { | |
95 assert(is_within_bounds(which), "index out of bounds"); | |
96 return &int_base()[which]; | |
97 } | |
98 | |
99 jshort* short_at_addr(int which) const { | |
100 assert(is_within_bounds(which), "index out of bounds"); | |
101 return &short_base()[which]; | |
102 } | |
103 | |
104 jushort* ushort_at_addr(int which) const { // for field descriptor arrays | |
105 assert(is_within_bounds(which), "index out of bounds"); | |
106 return (jushort*) &short_base()[which]; | |
107 } | |
108 | |
109 jlong* long_at_addr(int which) const { | |
110 assert(is_within_bounds(which), "index out of bounds"); | |
111 return &long_base()[which]; | |
112 } | |
113 | |
114 jfloat* float_at_addr(int which) const { | |
115 assert(is_within_bounds(which), "index out of bounds"); | |
116 return &float_base()[which]; | |
117 } | |
118 | |
119 jdouble* double_at_addr(int which) const { | |
120 assert(is_within_bounds(which), "index out of bounds"); | |
121 return &double_base()[which]; | |
122 } | |
123 | |
124 jbyte byte_at(int which) const { return *byte_at_addr(which); } | |
125 void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; } | |
126 | |
127 jboolean bool_at(int which) const { return *bool_at_addr(which); } | |
128 void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = contents; } | |
129 | |
130 jchar char_at(int which) const { return *char_at_addr(which); } | |
131 void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; } | |
132 | |
133 jint int_at(int which) const { return *int_at_addr(which); } | |
134 void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; } | |
135 | |
136 jshort short_at(int which) const { return *short_at_addr(which); } | |
137 void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; } | |
138 | |
139 jushort ushort_at(int which) const { return *ushort_at_addr(which); } | |
140 void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; } | |
141 | |
142 jlong long_at(int which) const { return *long_at_addr(which); } | |
143 void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; } | |
144 | |
145 jfloat float_at(int which) const { return *float_at_addr(which); } | |
146 void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; } | |
147 | |
148 jdouble double_at(int which) const { return *double_at_addr(which); } | |
149 void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; } | |
150 | |
151 jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); } | |
152 void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); } | |
153 | |
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154 // Java thinks metadata arrays are just arrays of either long or int, since |
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155 // there doesn't seem to be T_ADDRESS, so this is a bit of unfortunate |
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156 // casting |
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157 #ifdef _LP64 |
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158 Metadata* metadata_at(int which) const { |
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159 return (Metadata*)*long_at_addr(which); } |
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160 void metadata_at_put(int which, Metadata* contents) { |
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161 *long_at_addr(which) = (long)contents; |
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162 } |
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163 #else |
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164 Metadata* metadata_at(int which) const { |
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165 return (Metadata*)*int_at_addr(which); } |
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166 void metadata_at_put(int which, Metadata* contents) { |
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167 *int_at_addr(which) = (int)contents; |
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168 } |
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169 #endif // _LP64 |
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170 |
0 | 171 // Sizing |
172 | |
173 // Returns the number of words necessary to hold an array of "len" | |
174 // elements each of the given "byte_size". | |
175 private: | |
176 static int object_size(int lh, int length) { | |
177 int instance_header_size = Klass::layout_helper_header_size(lh); | |
178 int element_shift = Klass::layout_helper_log2_element_size(lh); | |
179 DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh)); | |
180 assert(length <= arrayOopDesc::max_array_length(etype), "no overflow"); | |
181 | |
182 julong size_in_bytes = length; | |
183 size_in_bytes <<= element_shift; | |
184 size_in_bytes += instance_header_size; | |
185 julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize); | |
186 assert(size_in_words <= (julong)max_jint, "no overflow"); | |
187 | |
188 return align_object_size((intptr_t)size_in_words); | |
189 } | |
190 | |
191 public: | |
192 int object_size() { | |
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193 TypeArrayKlass* tk = TypeArrayKlass::cast(klass()); |
0 | 194 return object_size(tk->layout_helper(), length()); |
195 } | |
196 }; | |
1972 | 197 |
198 #endif // SHARE_VM_OOPS_TYPEARRAYOOP_HPP |