Mercurial > hg > truffle
annotate src/share/vm/oops/arrayKlass.cpp @ 14521:29ccc4cbabca
Merge
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 12 Mar 2014 13:30:08 +0100 |
parents | 48314d596a04 |
children | 4ca6dc0799b6 386dd1c71858 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 | |
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62 oop ArrayKlass::multi_allocate(int rank, jint* sizes, TRAPS) { |
0 | 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"); | |
6983 | 70 return super()->uncached_lookup_method(name, signature); |
0 | 71 } |
72 | |
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73 ArrayKlass::ArrayKlass(Symbol* name) { |
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74 set_name(name); |
0 | 75 |
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76 set_super(Universe::is_bootstrapping() ? (Klass*)NULL : SystemDictionary::Object_klass()); |
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77 set_layout_helper(Klass::_lh_neutral_value); |
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78 set_dimension(1); |
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79 set_higher_dimension(NULL); |
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80 set_lower_dimension(NULL); |
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81 set_component_mirror(NULL); |
0 | 82 // Arrays don't add any new methods, so their vtable is the same size as |
83 // the vtable of klass Object. | |
84 int vtable_size = Universe::base_vtable_size(); | |
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85 set_vtable_length(vtable_size); |
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86 set_is_cloneable(); // All arrays are considered to be cloneable (See JLS 20.1.5) |
0 | 87 } |
88 | |
89 | |
90 // Initialization of vtables and mirror object is done separatly from base_create_array_klass, | |
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91 // since a GC can happen. At this point all instance variables of the ArrayKlass must be setup. |
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92 void ArrayKlass::complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS) { |
0 | 93 ResourceMark rm(THREAD); |
94 k->initialize_supers(super_klass(), CHECK); | |
95 k->vtable()->initialize_vtable(false, CHECK); | |
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96 java_lang_Class::create_mirror(k, Handle(NULL), CHECK); |
0 | 97 } |
98 | |
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99 GrowableArray<Klass*>* ArrayKlass::compute_secondary_supers(int num_extra_slots) { |
0 | 100 // interfaces = { cloneable_klass, serializable_klass }; |
101 assert(num_extra_slots == 0, "sanity of primitive array type"); | |
102 // Must share this for correct bootstrapping! | |
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103 set_secondary_supers(Universe::the_array_interfaces_array()); |
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104 return NULL; |
0 | 105 } |
106 | |
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107 bool ArrayKlass::compute_is_subtype_of(Klass* k) { |
0 | 108 // An array is a subtype of Serializable, Clonable, and Object |
1142 | 109 return k == SystemDictionary::Object_klass() |
110 || k == SystemDictionary::Cloneable_klass() | |
111 || k == SystemDictionary::Serializable_klass(); | |
0 | 112 } |
113 | |
114 | |
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115 inline intptr_t* ArrayKlass::start_of_vtable() const { |
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116 // all vtables start at the same place, that's why we use InstanceKlass::header_size here |
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117 return ((intptr_t*)this) + InstanceKlass::header_size(); |
0 | 118 } |
119 | |
120 | |
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121 klassVtable* ArrayKlass::vtable() const { |
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122 KlassHandle kh(Thread::current(), this); |
0 | 123 return new klassVtable(kh, start_of_vtable(), vtable_length() / vtableEntry::size()); |
124 } | |
125 | |
126 | |
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127 objArrayOop ArrayKlass::allocate_arrayArray(int n, int length, TRAPS) { |
0 | 128 if (length < 0) { |
129 THROW_0(vmSymbols::java_lang_NegativeArraySizeException()); | |
130 } | |
131 if (length > arrayOopDesc::max_array_length(T_ARRAY)) { | |
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132 report_java_out_of_memory("Requested array size exceeds VM limit"); |
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133 JvmtiExport::post_array_size_exhausted(); |
0 | 134 THROW_OOP_0(Universe::out_of_memory_error_array_size()); |
135 } | |
136 int size = objArrayOopDesc::object_size(length); | |
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137 Klass* k = array_klass(n+dimension(), CHECK_0); |
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138 ArrayKlass* ak = ArrayKlass::cast(k); |
0 | 139 objArrayOop o = |
140 (objArrayOop)CollectedHeap::array_allocate(ak, size, length, CHECK_0); | |
141 // initialization to NULL not necessary, area already cleared | |
142 return o; | |
143 } | |
144 | |
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145 void ArrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) { |
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146 Klass* k = this; |
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147 // Iterate over this array klass and all higher dimensions |
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148 while (k != NULL) { |
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149 f(k, CHECK); |
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150 k = ArrayKlass::cast(k)->higher_dimension(); |
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151 } |
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152 } |
0 | 153 |
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154 void ArrayKlass::array_klasses_do(void f(Klass* k)) { |
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155 Klass* k = this; |
0 | 156 // Iterate over this array klass and all higher dimensions |
157 while (k != NULL) { | |
158 f(k); | |
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159 k = ArrayKlass::cast(k)->higher_dimension(); |
0 | 160 } |
161 } | |
162 | |
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163 // GC support |
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164 |
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165 void ArrayKlass::oops_do(OopClosure* cl) { |
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166 Klass::oops_do(cl); |
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167 |
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168 cl->do_oop(adr_component_mirror()); |
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169 } |
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170 |
0 | 171 // JVM support |
172 | |
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173 jint ArrayKlass::compute_modifier_flags(TRAPS) const { |
0 | 174 return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; |
175 } | |
176 | |
177 // JVMTI support | |
178 | |
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179 jint ArrayKlass::jvmti_class_status() const { |
0 | 180 return JVMTI_CLASS_STATUS_ARRAY; |
181 } | |
182 | |
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183 void ArrayKlass::remove_unshareable_info() { |
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184 Klass::remove_unshareable_info(); |
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185 // Clear the java mirror |
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186 set_component_mirror(NULL); |
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187 } |
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188 |
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189 void ArrayKlass::restore_unshareable_info(TRAPS) { |
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190 Klass::restore_unshareable_info(CHECK); |
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191 // Klass recreates the component mirror also |
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192 } |
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193 |
0 | 194 // Printing |
195 | |
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196 void ArrayKlass::print_on(outputStream* st) const { |
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197 assert(is_klass(), "must be klass"); |
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198 Klass::print_on(st); |
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199 } |
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200 |
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201 void ArrayKlass::print_value_on(outputStream* st) const { |
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202 assert(is_klass(), "must be klass"); |
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203 for(int index = 0; index < dimension(); index++) { |
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204 st->print("[]"); |
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205 } |
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206 } |
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207 |
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208 void ArrayKlass::oop_print_on(oop obj, outputStream* st) { |
0 | 209 assert(obj->is_array(), "must be array"); |
210 Klass::oop_print_on(obj, st); | |
211 st->print_cr(" - length: %d", arrayOop(obj)->length()); | |
212 } | |
213 | |
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214 |
0 | 215 // Verification |
216 | |
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217 void ArrayKlass::verify_on(outputStream* st) { |
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218 Klass::verify_on(st); |
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219 |
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220 if (component_mirror() != NULL) { |
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221 guarantee(component_mirror()->klass() != NULL, "should have a class"); |
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222 } |
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223 } |
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224 |
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225 void ArrayKlass::oop_verify_on(oop obj, outputStream* st) { |
0 | 226 guarantee(obj->is_array(), "must be array"); |
227 arrayOop a = arrayOop(obj); | |
228 guarantee(a->length() >= 0, "array with negative length?"); | |
229 } |