Mercurial > hg > graal-compiler
annotate src/share/vm/oops/arrayKlass.cpp @ 6781:b711844284e2
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Reviewed-by: kvn, ysr, azeemj
author | nloodin |
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date | Fri, 21 Sep 2012 10:56:28 +0200 |
parents | da91efe96a93 |
children | d8ce2825b193 |
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 #include "precompiled.hpp" |
26 #include "classfile/javaClasses.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "gc_interface/collectedHeap.inline.hpp" | |
30 #include "jvmtifiles/jvmti.h" | |
31 #include "memory/gcLocker.hpp" | |
32 #include "memory/universe.inline.hpp" | |
33 #include "oops/arrayKlass.hpp" | |
34 #include "oops/arrayOop.hpp" | |
35 #include "oops/instanceKlass.hpp" | |
36 #include "oops/objArrayOop.hpp" | |
37 #include "oops/oop.inline.hpp" | |
0 | 38 |
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39 int arrayKlass::static_size(int header_size) { |
0 | 40 // size of an array klass object |
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41 assert(header_size <= InstanceKlass::header_size(), "bad header size"); |
0 | 42 // If this assert fails, see comments in base_create_array_klass. |
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43 header_size = InstanceKlass::header_size(); |
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44 int vtable_len = Universe::base_vtable_size(); |
0 | 45 #ifdef _LP64 |
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46 int size = header_size + align_object_offset(vtable_len); |
0 | 47 #else |
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48 int size = header_size + vtable_len; |
0 | 49 #endif |
50 return align_object_size(size); | |
51 } | |
52 | |
53 | |
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54 Klass* arrayKlass::java_super() const { |
0 | 55 if (super() == NULL) return NULL; // bootstrap case |
56 // Array klasses have primary supertypes which are not reported to Java. | |
57 // Example super chain: String[][] -> Object[][] -> Object[] -> Object | |
1142 | 58 return SystemDictionary::Object_klass(); |
0 | 59 } |
60 | |
61 | |
62 oop arrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) { | |
63 ShouldNotReachHere(); | |
64 return NULL; | |
65 } | |
66 | |
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67 Method* arrayKlass::uncached_lookup_method(Symbol* name, Symbol* signature) const { |
0 | 68 // There are no methods in an array klass but the super class (Object) has some |
69 assert(super(), "super klass must be present"); | |
70 return Klass::cast(super())->uncached_lookup_method(name, signature); | |
71 } | |
72 | |
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73 arrayKlass::arrayKlass(Symbol* name) { |
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74 set_alloc_size(0); |
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75 set_name(name); |
0 | 76 |
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77 set_super(Universe::is_bootstrapping() ? (Klass*)NULL : SystemDictionary::Object_klass()); |
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78 set_layout_helper(Klass::_lh_neutral_value); |
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79 set_dimension(1); |
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80 set_higher_dimension(NULL); |
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81 set_lower_dimension(NULL); |
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82 set_component_mirror(NULL); |
0 | 83 // Arrays don't add any new methods, so their vtable is the same size as |
84 // the vtable of klass Object. | |
85 int vtable_size = Universe::base_vtable_size(); | |
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86 set_vtable_length(vtable_size); |
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87 set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5) |
0 | 88 } |
89 | |
90 | |
91 // Initialization of vtables and mirror object is done separatly from base_create_array_klass, | |
92 // since a GC can happen. At this point all instance variables of the arrayKlass must be setup. | |
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93 void arrayKlass::complete_create_array_klass(arrayKlass* k, KlassHandle super_klass, TRAPS) { |
0 | 94 ResourceMark rm(THREAD); |
95 k->initialize_supers(super_klass(), CHECK); | |
96 k->vtable()->initialize_vtable(false, CHECK); | |
97 java_lang_Class::create_mirror(k, CHECK); | |
98 } | |
99 | |
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100 GrowableArray<Klass*>* arrayKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 101 // interfaces = { cloneable_klass, serializable_klass }; |
102 assert(num_extra_slots == 0, "sanity of primitive array type"); | |
103 // Must share this for correct bootstrapping! | |
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104 set_secondary_supers(Universe::the_array_interfaces_array()); |
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105 return NULL; |
0 | 106 } |
107 | |
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108 bool arrayKlass::compute_is_subtype_of(Klass* k) { |
0 | 109 // An array is a subtype of Serializable, Clonable, and Object |
1142 | 110 return k == SystemDictionary::Object_klass() |
111 || k == SystemDictionary::Cloneable_klass() | |
112 || k == SystemDictionary::Serializable_klass(); | |
0 | 113 } |
114 | |
115 | |
116 inline intptr_t* arrayKlass::start_of_vtable() const { | |
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117 // all vtables start at the same place, that's why we use InstanceKlass::header_size here |
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118 return ((intptr_t*)this) + InstanceKlass::header_size(); |
0 | 119 } |
120 | |
121 | |
122 klassVtable* arrayKlass::vtable() const { | |
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123 KlassHandle kh(Thread::current(), this); |
0 | 124 return new klassVtable(kh, start_of_vtable(), vtable_length() / vtableEntry::size()); |
125 } | |
126 | |
127 | |
128 objArrayOop arrayKlass::allocate_arrayArray(int n, int length, TRAPS) { | |
129 if (length < 0) { | |
130 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); | |
131 } | |
132 if (length > arrayOopDesc::max_array_length(T_ARRAY)) { | |
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133 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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134 JvmtiExport::post_array_size_exhausted(); |
0 | 135 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
136 } | |
137 int size = objArrayOopDesc::object_size(length); | |
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138 Klass* k = array_klass(n+dimension(), CHECK_0); |
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139 arrayKlass* ak = arrayKlass::cast(k); |
0 | 140 objArrayOop o = |
141 (objArrayOop)CollectedHeap::array_allocate(ak, size, length, CHECK_0); | |
142 // initialization to NULL not necessary, area already cleared | |
143 return o; | |
144 } | |
145 | |
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146 void arrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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147 Klass* k = this; |
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148 // Iterate over this array klass and all higher dimensions |
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149 while (k != NULL) { |
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150 f(k, CHECK); |
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151 k = arrayKlass::cast(k)->higher_dimension(); |
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152 } |
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153 } |
0 | 154 |
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155 void arrayKlass::array_klasses_do(void f(Klass* k)) { |
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156 Klass* k = this; |
0 | 157 // Iterate over this array klass and all higher dimensions |
158 while (k != NULL) { | |
159 f(k); | |
160 k = arrayKlass::cast(k)->higher_dimension(); | |
161 } | |
162 } | |
163 | |
164 | |
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165 void arrayKlass::with_array_klasses_do(void f(Klass* k)) { |
0 | 166 array_klasses_do(f); |
167 } | |
168 | |
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169 |
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170 // GC support |
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171 |
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172 void arrayKlass::oops_do(OopClosure* cl) { |
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173 Klass::oops_do(cl); |
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174 |
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175 cl->do_oop(adr_component_mirror()); |
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176 } |
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177 |
0 | 178 // JVM support |
179 | |
180 jint arrayKlass::compute_modifier_flags(TRAPS) const { | |
181 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; | |
182 } | |
183 | |
184 // JVMTI support | |
185 | |
186 jint arrayKlass::jvmti_class_status() const { | |
187 return JVMTI_CLASS_STATUS_ARRAY; | |
188 } | |
189 | |
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190 void arrayKlass::remove_unshareable_info() { |
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191 Klass::remove_unshareable_info(); |
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192 // Clear the java mirror |
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193 set_component_mirror(NULL); |
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194 } |
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195 |
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196 void arrayKlass::restore_unshareable_info(TRAPS) { |
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197 Klass::restore_unshareable_info(CHECK); |
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198 // Klass recreates the component mirror also |
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199 } |
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200 |
0 | 201 // Printing |
202 | |
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203 void arrayKlass::print_on(outputStream* st) const { |
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204 assert(is_klass(), "must be klass"); |
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205 Klass::print_on(st); |
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206 } |
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207 |
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208 void arrayKlass::print_value_on(outputStream* st) const { |
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209 assert(is_klass(), "must be klass"); |
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210 for(int index = 0; index < dimension(); index++) { |
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211 st->print("[]"); |
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212 } |
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213 } |
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214 |
0 | 215 void arrayKlass::oop_print_on(oop obj, outputStream* st) { |
216 assert(obj->is_array(), "must be array"); | |
217 Klass::oop_print_on(obj, st); | |
218 st->print_cr(" - length: %d", arrayOop(obj)->length()); | |
219 } | |
220 | |
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221 |
0 | 222 // Verification |
223 | |
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224 void arrayKlass::verify_on(outputStream* st) { |
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225 Klass::verify_on(st); |
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226 |
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227 if (component_mirror() != NULL) { |
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228 guarantee(component_mirror()->klass() != NULL, "should have a class"); |
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229 } |
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230 } |
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231 |
0 | 232 void arrayKlass::oop_verify_on(oop obj, outputStream* st) { |
233 guarantee(obj->is_array(), "must be array"); | |
234 arrayOop a = arrayOop(obj); | |
235 guarantee(a->length() >= 0, "array with negative length?"); | |
236 } |