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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
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 #include "runtime/orderAccess.inline.hpp"
31
32 // A typeArrayOop is an array containing basic types (non oop elements).
33 // It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}
34 #include <limits.h>
35
36 class typeArrayOopDesc : public arrayOopDesc {
37 protected:
38 jchar* char_base() const { return (jchar*) base(T_CHAR); }
39 jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); }
40 jbyte* byte_base() const { return (jbyte*) base(T_BYTE); }
41 jint* int_base() const { return (jint*) base(T_INT); }
42 jlong* long_base() const { return (jlong*) base(T_LONG); }
43 jshort* short_base() const { return (jshort*) base(T_SHORT); }
44 jfloat* float_base() const { return (jfloat*) base(T_FLOAT); }
45 jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); }
46
47 friend class TypeArrayKlass;
75 jushort* ushort_at_addr(int which) const { // for field descriptor arrays
76 assert(is_within_bounds(which), "index out of bounds");
77 return (jushort*) &short_base()[which];
78 }
79
80 jlong* long_at_addr(int which) const {
81 assert(is_within_bounds(which), "index out of bounds");
82 return &long_base()[which];
83 }
84
85 jfloat* float_at_addr(int which) const {
86 assert(is_within_bounds(which), "index out of bounds");
87 return &float_base()[which];
88 }
89
90 jdouble* double_at_addr(int which) const {
91 assert(is_within_bounds(which), "index out of bounds");
92 return &double_base()[which];
93 }
94
95 jbyte byte_at(int which) const { return *byte_at_addr(which); }
96 void byte_at_put(int which, jbyte contents) { *byte_at_addr(which) = contents; }
97
98 jboolean bool_at(int which) const { return *bool_at_addr(which); }
99 void bool_at_put(int which, jboolean contents) { *bool_at_addr(which) = contents; }
100
101 jchar char_at(int which) const { return *char_at_addr(which); }
102 void char_at_put(int which, jchar contents) { *char_at_addr(which) = contents; }
103
104 jint int_at(int which) const { return *int_at_addr(which); }
105 void int_at_put(int which, jint contents) { *int_at_addr(which) = contents; }
106
107 jshort short_at(int which) const { return *short_at_addr(which); }
108 void short_at_put(int which, jshort contents) { *short_at_addr(which) = contents; }
109
110 jushort ushort_at(int which) const { return *ushort_at_addr(which); }
111 void ushort_at_put(int which, jushort contents) { *ushort_at_addr(which) = contents; }
112
113 jlong long_at(int which) const { return *long_at_addr(which); }
114 void long_at_put(int which, jlong contents) { *long_at_addr(which) = contents; }
115
116 jfloat float_at(int which) const { return *float_at_addr(which); }
117 void float_at_put(int which, jfloat contents) { *float_at_addr(which) = contents; }
118
119 jdouble double_at(int which) const { return *double_at_addr(which); }
120 void double_at_put(int which, jdouble contents) { *double_at_addr(which) = contents; }
121
122 jbyte byte_at_acquire(int which) const { return OrderAccess::load_acquire(byte_at_addr(which)); }
123 void release_byte_at_put(int which, jbyte contents) { OrderAccess::release_store(byte_at_addr(which), contents); }
124
125 // Java thinks metadata arrays are just arrays of either long or int, since
126 // there doesn't seem to be T_ADDRESS, so this is a bit of unfortunate
127 // casting
128 #ifdef _LP64
129 Metadata* metadata_at(int which) const {
130 return (Metadata*)*long_at_addr(which); }
131 void metadata_at_put(int which, Metadata* contents) {
132 *long_at_addr(which) = (long)contents;
133 }
134 #else
135 Metadata* metadata_at(int which) const {
136 return (Metadata*)*int_at_addr(which); }
137 void metadata_at_put(int which, Metadata* contents) {
138 *int_at_addr(which) = (int)contents;
139 }
140 #endif // _LP64
141
142 // Sizing
143
144 // Returns the number of words necessary to hold an array of "len"
145 // elements each of the given "byte_size".
146 private:
147 static int object_size(int lh, int length) {
148 int instance_header_size = Klass::layout_helper_header_size(lh);
149 int element_shift = Klass::layout_helper_log2_element_size(lh);
150 DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));
151 assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");
152
153 julong size_in_bytes = (juint)length;
154 size_in_bytes <<= element_shift;
155 size_in_bytes += instance_header_size;
156 julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);
157 assert(size_in_words <= (julong)max_jint, "no overflow");
158
|
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_OOPS_TYPEARRAYOOP_HPP
26 #define SHARE_VM_OOPS_TYPEARRAYOOP_HPP
27
28 #include "gc/shared/barrierSet.hpp"
29 #include "oops/arrayOop.hpp"
30 #include "oops/typeArrayKlass.hpp"
31 #include "runtime/orderAccess.inline.hpp"
32
33 // A typeArrayOop is an array containing basic types (non oop elements).
34 // It is used for arrays of {characters, singles, doubles, bytes, shorts, integers, longs}
35 #include <limits.h>
36
37 class typeArrayOopDesc : public arrayOopDesc {
38 protected:
39 jchar* char_base() const { return (jchar*) base(T_CHAR); }
40 jboolean* bool_base() const { return (jboolean*)base(T_BOOLEAN); }
41 jbyte* byte_base() const { return (jbyte*) base(T_BYTE); }
42 jint* int_base() const { return (jint*) base(T_INT); }
43 jlong* long_base() const { return (jlong*) base(T_LONG); }
44 jshort* short_base() const { return (jshort*) base(T_SHORT); }
45 jfloat* float_base() const { return (jfloat*) base(T_FLOAT); }
46 jdouble* double_base() const { return (jdouble*) base(T_DOUBLE); }
47
48 friend class TypeArrayKlass;
76 jushort* ushort_at_addr(int which) const { // for field descriptor arrays
77 assert(is_within_bounds(which), "index out of bounds");
78 return (jushort*) &short_base()[which];
79 }
80
81 jlong* long_at_addr(int which) const {
82 assert(is_within_bounds(which), "index out of bounds");
83 return &long_base()[which];
84 }
85
86 jfloat* float_at_addr(int which) const {
87 assert(is_within_bounds(which), "index out of bounds");
88 return &float_base()[which];
89 }
90
91 jdouble* double_at_addr(int which) const {
92 assert(is_within_bounds(which), "index out of bounds");
93 return &double_base()[which];
94 }
95
96 jbyte byte_at(int which) const {
97 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
98 return *p->byte_at_addr(which);
99 }
100 void byte_at_put(int which, jbyte contents) {
101 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
102 *p->byte_at_addr(which) = contents;
103 }
104
105 jboolean bool_at(int which) const {
106 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
107 return *p->bool_at_addr(which);
108 }
109 void bool_at_put(int which, jboolean contents) {
110 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
111 *p->bool_at_addr(which) = contents;
112 }
113
114 jchar char_at(int which) const {
115 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
116 return *p->char_at_addr(which);
117 }
118 void char_at_put(int which, jchar contents) {
119 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
120 *p->char_at_addr(which) = contents;
121 }
122
123 jint int_at(int which) const {
124 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
125 return *p->int_at_addr(which);
126 }
127 void int_at_put(int which, jint contents) {
128 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
129 *p->int_at_addr(which) = contents;
130 }
131
132 jshort short_at(int which) const {
133 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
134 return *p->short_at_addr(which);
135 }
136 void short_at_put(int which, jshort contents) {
137 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
138 *p->short_at_addr(which) = contents;
139 }
140
141 jushort ushort_at(int which) const {
142 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
143 return *p->ushort_at_addr(which);
144 }
145 void ushort_at_put(int which, jushort contents) {
146 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
147 *p->ushort_at_addr(which) = contents;
148 }
149
150 jlong long_at(int which) const {
151 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
152 return *p->long_at_addr(which);
153 }
154 void long_at_put(int which, jlong contents) {
155 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
156 *p->long_at_addr(which) = contents;
157 }
158
159 jfloat float_at(int which) const {
160 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
161 return *p->float_at_addr(which);
162 }
163 void float_at_put(int which, jfloat contents) {
164 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
165 *p->float_at_addr(which) = contents;
166 }
167
168 jdouble double_at(int which) const {
169 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
170 return *p->double_at_addr(which);
171 }
172 void double_at_put(int which, jdouble contents) {
173 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
174 *p->double_at_addr(which) = contents;
175 }
176
177 jbyte byte_at_acquire(int which) const {
178 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
179 return OrderAccess::load_acquire(p->byte_at_addr(which));
180 }
181 void release_byte_at_put(int which, jbyte contents) {
182 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
183 OrderAccess::release_store(p->byte_at_addr(which), contents);
184 }
185
186 // Java thinks metadata arrays are just arrays of either long or int, since
187 // there doesn't seem to be T_ADDRESS, so this is a bit of unfortunate
188 // casting
189 #ifdef _LP64
190 Metadata* metadata_at(int which) const {
191 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
192 return (Metadata*)*p->long_at_addr(which);
193 }
194 void metadata_at_put(int which, Metadata* contents) {
195 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
196 *p->long_at_addr(which) = (long)contents;
197 }
198 #else
199 Metadata* metadata_at(int which) const {
200 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_oop((oop) this));
201 return (Metadata*)*p->int_at_addr(which);
202 }
203 void metadata_at_put(int which, Metadata* contents) {
204 typeArrayOop p = typeArrayOop(oopDesc::bs()->resolve_and_maybe_copy_oop(this));
205 *p->int_at_addr(which) = (int)contents;
206 }
207 #endif // _LP64
208
209 // Sizing
210
211 // Returns the number of words necessary to hold an array of "len"
212 // elements each of the given "byte_size".
213 private:
214 static int object_size(int lh, int length) {
215 int instance_header_size = Klass::layout_helper_header_size(lh);
216 int element_shift = Klass::layout_helper_log2_element_size(lh);
217 DEBUG_ONLY(BasicType etype = Klass::layout_helper_element_type(lh));
218 assert(length <= arrayOopDesc::max_array_length(etype), "no overflow");
219
220 julong size_in_bytes = (juint)length;
221 size_in_bytes <<= element_shift;
222 size_in_bytes += instance_header_size;
223 julong size_in_words = ((size_in_bytes + (HeapWordSize-1)) >> LogHeapWordSize);
224 assert(size_in_words <= (julong)max_jint, "no overflow");
225
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