Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceKlass.hpp @ 6948:e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 12 Nov 2012 23:14:12 +0100 |
parents | dddcdb7ae209 4735d2c84362 |
children | 2cb439954abf |
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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_INSTANCEKLASS_HPP |
26 #define SHARE_VM_OOPS_INSTANCEKLASS_HPP | |
27 | |
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28 #include "classfile/classLoaderData.hpp" |
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29 #include "oops/annotations.hpp" |
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30 #include "oops/constMethod.hpp" |
3938 | 31 #include "oops/fieldInfo.hpp" |
1972 | 32 #include "oops/instanceOop.hpp" |
33 #include "oops/klassVtable.hpp" | |
34 #include "runtime/handles.hpp" | |
35 #include "runtime/os.hpp" | |
36 #include "utilities/accessFlags.hpp" | |
37 #include "utilities/bitMap.inline.hpp" | |
38 | |
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39 // An InstanceKlass is the VM level representation of a Java class. |
0 | 40 // It contains all information needed for at class at execution runtime. |
41 | |
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42 // InstanceKlass layout: |
0 | 43 // [C++ vtbl pointer ] Klass |
44 // [subtype cache ] Klass | |
45 // [instance size ] Klass | |
46 // [java mirror ] Klass | |
47 // [super ] Klass | |
48 // [access_flags ] Klass | |
49 // [name ] Klass | |
50 // [first subklass ] Klass | |
51 // [next sibling ] Klass | |
52 // [array klasses ] | |
53 // [methods ] | |
54 // [local interfaces ] | |
55 // [transitive interfaces ] | |
56 // [fields ] | |
57 // [constants ] | |
58 // [class loader ] | |
59 // [protection domain ] | |
60 // [signers ] | |
61 // [source file name ] | |
62 // [inner classes ] | |
63 // [static field size ] | |
64 // [nonstatic field size ] | |
65 // [static oop fields size ] | |
66 // [nonstatic oop maps size ] | |
67 // [has finalize method ] | |
68 // [deoptimization mark bit ] | |
69 // [initialization state ] | |
70 // [initializing thread ] | |
71 // [Java vtable length ] | |
72 // [oop map cache (stack maps) ] | |
73 // [EMBEDDED Java vtable ] size in words = vtable_len | |
74 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size | |
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75 // The embedded nonstatic oop-map blocks are short pairs (offset, length) |
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76 // indicating where oops are located in instances of this klass. |
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77 // [EMBEDDED implementor of the interface] only exist for interface |
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78 // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) |
0 | 79 |
80 | |
81 // forward declaration for class -- see below for definition | |
82 class SuperTypeClosure; | |
83 class JNIid; | |
84 class jniIdMapBase; | |
85 class BreakpointInfo; | |
86 class fieldDescriptor; | |
87 class DepChange; | |
88 class nmethodBucket; | |
89 class PreviousVersionNode; | |
90 class JvmtiCachedClassFieldMap; | |
91 | |
92 // This is used in iterators below. | |
93 class FieldClosure: public StackObj { | |
94 public: | |
95 virtual void do_field(fieldDescriptor* fd) = 0; | |
96 }; | |
97 | |
98 #ifndef PRODUCT | |
99 // Print fields. | |
100 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. | |
101 class FieldPrinter: public FieldClosure { | |
102 oop _obj; | |
103 outputStream* _st; | |
104 public: | |
105 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} | |
106 void do_field(fieldDescriptor* fd); | |
107 }; | |
108 #endif // !PRODUCT | |
109 | |
938 | 110 // ValueObjs embedded in klass. Describes where oops are located in instances of |
111 // this klass. | |
112 class OopMapBlock VALUE_OBJ_CLASS_SPEC { | |
113 public: | |
114 // Byte offset of the first oop mapped by this block. | |
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115 int offset() const { return _offset; } |
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116 void set_offset(int offset) { _offset = offset; } |
938 | 117 |
118 // Number of oops in this block. | |
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119 uint count() const { return _count; } |
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120 void set_count(uint count) { _count = count; } |
938 | 121 |
122 // sizeof(OopMapBlock) in HeapWords. | |
123 static const int size_in_words() { | |
124 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> | |
125 LogHeapWordSize; | |
126 } | |
127 | |
128 private: | |
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129 int _offset; |
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130 uint _count; |
938 | 131 }; |
132 | |
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133 class InstanceKlass: public Klass { |
0 | 134 friend class VMStructs; |
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135 friend class ClassFileParser; |
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136 |
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137 protected: |
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138 // Constructor |
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139 InstanceKlass(int vtable_len, |
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140 int itable_len, |
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141 int static_field_size, |
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142 int nonstatic_oop_map_size, |
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143 ReferenceType rt, |
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144 AccessFlags access_flags, |
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145 bool is_anonymous); |
0 | 146 public: |
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147 static Klass* allocate_instance_klass(ClassLoaderData* loader_data, |
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148 int vtable_len, |
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149 int itable_len, |
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150 int static_field_size, |
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151 int nonstatic_oop_map_size, |
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152 ReferenceType rt, |
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153 AccessFlags access_flags, |
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154 Symbol* name, |
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155 Klass* super_klass, |
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156 KlassHandle host_klass, |
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157 TRAPS); |
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158 |
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159 InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
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160 |
0 | 161 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description |
162 // of the class loading & initialization procedure, and the use of the states. | |
163 enum ClassState { | |
164 allocated, // allocated (but not yet linked) | |
165 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
166 linked, // successfully linked/verified (but not initialized yet) | |
167 being_initialized, // currently running class initializer | |
168 fully_initialized, // initialized (successfull final state) | |
169 initialization_error // error happened during initialization | |
170 }; | |
171 | |
172 protected: | |
173 // Protection domain. | |
174 oop _protection_domain; | |
175 // Class signers. | |
176 objArrayOop _signers; | |
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177 // Initialization lock. Must be one per class and it has to be a VM internal |
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178 // object so java code cannot lock it (like the mirror) |
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179 // It has to be an object not a Mutex because it's held through java calls. |
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180 volatile oop _init_lock; |
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181 |
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182 // Annotations for this class |
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183 Annotations* _annotations; |
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184 // Array classes holding elements of this class. |
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185 Klass* _array_klasses; |
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186 // Constant pool for this class. |
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187 ConstantPool* _constants; |
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188 // The InnerClasses attribute and EnclosingMethod attribute. The |
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189 // _inner_classes is an array of shorts. If the class has InnerClasses |
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190 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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191 // [inner_class_info_index, outer_class_info_index, |
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192 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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193 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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194 // last two shorts [class_index, method_index] of the array. If only |
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195 // the InnerClasses attribute exists, the _inner_classes array length is |
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196 // number_of_inner_classes * 4. If the class has both InnerClasses |
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197 // and EnclosingMethod attributes the _inner_classes array length is |
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198 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
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199 Array<jushort>* _inner_classes; |
0 | 200 |
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201 // Name of source file containing this klass, NULL if not specified. |
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202 Symbol* _source_file_name; |
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203 // the source debug extension for this klass, NULL if not specified. |
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204 // Specified as UTF-8 string without terminating zero byte in the classfile, |
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205 // it is stored in the instanceklass as a NULL-terminated UTF-8 string |
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206 char* _source_debug_extension; |
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207 // Generic signature, or null if none. |
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208 Symbol* _generic_signature; |
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209 // Array name derived from this class which needs unreferencing |
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210 // if this class is unloaded. |
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211 Symbol* _array_name; |
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212 |
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213 // Number of heapOopSize words used by non-static fields in this klass |
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214 // (including inherited fields but after header_size()). |
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215 int _nonstatic_field_size; |
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216 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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217 u2 _static_oop_field_count;// number of static oop fields in this klass |
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218 u2 _java_fields_count; // The number of declared Java fields |
938 | 219 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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220 |
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221 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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222 enum { |
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223 _misc_rewritten = 1 << 0, // methods rewritten. |
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224 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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225 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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226 _misc_is_anonymous = 1 << 3 // has embedded _inner_classes field |
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227 }; |
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228 u2 _misc_flags; |
0 | 229 u2 _minor_version; // minor version number of class file |
230 u2 _major_version; // major version number of class file | |
231 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
232 int _vtable_len; // length of Java vtable (in words) | |
233 int _itable_len; // length of Java itable (in words) | |
234 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
235 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
236 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
237 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
238 nmethodBucket* _dependencies; // list of dependent nmethods | |
239 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
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240 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
0 | 241 // Array of interesting part(s) of the previous version(s) of this |
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242 // InstanceKlass. See PreviousVersionWalker below. |
0 | 243 GrowableArray<PreviousVersionNode *>* _previous_versions; |
244 // JVMTI fields can be moved to their own structure - see 6315920 | |
245 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
246 jint _cached_class_file_len; // JVMTI: length of above | |
247 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
6934 | 248 |
249 // true if class, superclass, or implemented interfaces have default methods | |
250 bool _has_default_methods; | |
251 | |
0 | 252 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
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253 // Method array. |
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254 Array<Method*>* _methods; |
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255 // Interface (Klass*s) this class declares locally to implement. |
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256 Array<Klass*>* _local_interfaces; |
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257 // Interface (Klass*s) this class implements transitively. |
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258 Array<Klass*>* _transitive_interfaces; |
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259 // Int array containing the original order of method in the class file (for JVMTI). |
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260 Array<int>* _method_ordering; |
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261 // Instance and static variable information, starts with 6-tuples of shorts |
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262 // [access, name index, sig index, initval index, low_offset, high_offset] |
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263 // for all fields, followed by the generic signature data at the end of |
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264 // the array. Only fields with generic signature attributes have the generic |
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265 // signature data set in the array. The fields array looks like following: |
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266 // |
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267 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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268 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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269 // ... |
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270 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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271 // [generic signature index] |
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272 // [generic signature index] |
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273 // ... |
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274 Array<u2>* _fields; |
0 | 275 |
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276 // Class states are defined as ClassState (see above). |
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277 // Place the _init_state here to utilize the unused 2-byte after |
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278 // _idnum_allocated_count. |
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279 u1 _init_state; // state of class |
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280 |
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281 u1 _reference_type; // reference type |
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282 |
0 | 283 // embedded Java vtable follows here |
284 // embedded Java itables follows here | |
285 // embedded static fields follows here | |
286 // embedded nonstatic oop-map blocks follows here | |
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287 // embedded implementor of this interface follows here |
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288 // The embedded implementor only exists if the current klass is an |
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289 // iterface. The possible values of the implementor fall into following |
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290 // three cases: |
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291 // NULL: no implementor. |
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292 // A Klass* that's not itself: one implementor. |
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293 // Itsef: more than one implementors. |
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294 // embedded host klass follows here |
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295 // The embedded host klass only exists in an anonymous class for |
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296 // dynamic language support (JSR 292 enabled). The host class grants |
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297 // its access privileges to this class also. The host class is either |
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298 // named, or a previously loaded anonymous class. A non-anonymous class |
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299 // or an anonymous class loaded through normal classloading does not |
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300 // have this embedded field. |
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301 // |
0 | 302 |
303 friend class SystemDictionary; | |
304 | |
305 public: | |
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306 bool has_nonstatic_fields() const { |
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307 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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308 } |
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309 void set_has_nonstatic_fields(bool b) { |
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310 if (b) { |
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311 _misc_flags |= _misc_has_nonstatic_fields; |
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312 } else { |
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313 _misc_flags &= ~_misc_has_nonstatic_fields; |
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314 } |
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315 } |
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316 |
0 | 317 // field sizes |
318 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
319 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
320 | |
321 int static_field_size() const { return _static_field_size; } | |
322 void set_static_field_size(int size) { _static_field_size = size; } | |
323 | |
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324 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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325 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 326 |
327 // Java vtable | |
328 int vtable_length() const { return _vtable_len; } | |
329 void set_vtable_length(int len) { _vtable_len = len; } | |
330 | |
331 // Java itable | |
332 int itable_length() const { return _itable_len; } | |
333 void set_itable_length(int len) { _itable_len = len; } | |
334 | |
335 // array klasses | |
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336 Klass* array_klasses() const { return _array_klasses; } |
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337 void set_array_klasses(Klass* k) { _array_klasses = k; } |
0 | 338 |
339 // methods | |
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340 Array<Method*>* methods() const { return _methods; } |
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341 void set_methods(Array<Method*>* a) { _methods = a; } |
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342 Method* method_with_idnum(int idnum); |
0 | 343 |
344 // method ordering | |
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345 Array<int>* method_ordering() const { return _method_ordering; } |
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346 void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
0 | 347 |
348 // interfaces | |
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349 Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
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350 void set_local_interfaces(Array<Klass*>* a) { |
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351 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
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352 _local_interfaces = a; } |
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353 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
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354 void set_transitive_interfaces(Array<Klass*>* a) { |
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355 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
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356 _transitive_interfaces = a; } |
0 | 357 |
3938 | 358 private: |
359 friend class fieldDescriptor; | |
360 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
361 | |
362 public: | |
363 int field_offset (int index) const { return field(index)->offset(); } | |
364 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
365 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
366 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
367 | |
368 // Number of Java declared fields | |
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369 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 370 |
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371 Array<u2>* fields() const { return _fields; } |
3938 | 372 |
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373 void set_fields(Array<u2>* f, u2 java_fields_count) { |
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374 guarantee(_fields == NULL || f == NULL, "Just checking"); |
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375 _fields = f; |
3938 | 376 _java_fields_count = java_fields_count; |
0 | 377 } |
378 | |
379 // inner classes | |
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380 Array<u2>* inner_classes() const { return _inner_classes; } |
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381 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
0 | 382 |
383 enum InnerClassAttributeOffset { | |
384 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
385 inner_class_inner_class_info_offset = 0, | |
386 inner_class_outer_class_info_offset = 1, | |
387 inner_class_inner_name_offset = 2, | |
388 inner_class_access_flags_offset = 3, | |
389 inner_class_next_offset = 4 | |
390 }; | |
391 | |
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392 enum EnclosingMethodAttributeOffset { |
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393 enclosing_method_class_index_offset = 0, |
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394 enclosing_method_method_index_offset = 1, |
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395 enclosing_method_attribute_size = 2 |
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396 }; |
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397 |
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398 // method override check |
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399 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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400 |
0 | 401 // package |
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402 bool is_same_class_package(Klass* class2); |
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403 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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404 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 405 |
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406 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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407 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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408 instanceKlassHandle self(THREAD, this); |
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409 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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410 } |
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411 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, |
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412 bool* inner_is_member, TRAPS); |
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413 |
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414 // tell if two classes have the same enclosing class (at package level) |
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415 bool is_same_package_member(Klass* class2, TRAPS) { |
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416 instanceKlassHandle self(THREAD, this); |
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417 return is_same_package_member_impl(self, class2, THREAD); |
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418 } |
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419 static bool is_same_package_member_impl(instanceKlassHandle self, |
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420 Klass* class2, TRAPS); |
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421 |
0 | 422 // initialization state |
423 bool is_loaded() const { return _init_state >= loaded; } | |
424 bool is_linked() const { return _init_state >= linked; } | |
425 bool is_initialized() const { return _init_state == fully_initialized; } | |
426 bool is_not_initialized() const { return _init_state < being_initialized; } | |
427 bool is_being_initialized() const { return _init_state == being_initialized; } | |
428 bool is_in_error_state() const { return _init_state == initialization_error; } | |
429 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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430 ClassState init_state() { return (ClassState)_init_state; } |
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431 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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432 |
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433 // defineClass specified verification |
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434 bool should_verify_class() const { |
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435 return (_misc_flags & _misc_should_verify_class) != 0; |
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436 } |
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437 void set_should_verify_class(bool value) { |
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438 if (value) { |
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439 _misc_flags |= _misc_should_verify_class; |
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440 } else { |
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441 _misc_flags &= ~_misc_should_verify_class; |
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442 } |
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443 } |
0 | 444 |
445 // marking | |
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446 bool is_marked_dependent() const { return _is_marked_dependent; } |
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447 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 448 |
449 // initialization (virtuals from Klass) | |
450 bool should_be_initialized() const; // means that initialize should be called | |
451 void initialize(TRAPS); | |
452 void link_class(TRAPS); | |
453 bool link_class_or_fail(TRAPS); // returns false on failure | |
454 void unlink_class(); | |
455 void rewrite_class(TRAPS); | |
3404 | 456 void relocate_and_link_methods(TRAPS); |
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457 Method* class_initializer(); |
0 | 458 |
459 // set the class to initialized if no static initializer is present | |
460 void eager_initialize(Thread *thread); | |
461 | |
462 // reference type | |
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463 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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464 void set_reference_type(ReferenceType t) { |
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465 assert(t == (u1)t, "overflow"); |
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466 _reference_type = (u1)t; |
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467 } |
0 | 468 |
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469 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
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470 |
0 | 471 // find local field, returns true if found |
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472 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 473 // find field in direct superinterfaces, returns the interface in which the field is defined |
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474 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 475 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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476 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 477 // find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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478 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 479 |
480 // find a non-static or static field given its offset within the class. | |
481 bool contains_field_offset(int offset) { | |
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482 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 483 } |
484 | |
485 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
486 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
487 | |
488 // find a local method (returns NULL if not found) | |
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489 Method* find_method(Symbol* name, Symbol* signature) const; |
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490 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
0 | 491 |
492 // lookup operation (returns NULL if not found) | |
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493 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 494 |
495 // lookup a method in all the interfaces that this class implements | |
496 // (returns NULL if not found) | |
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497 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 498 |
6934 | 499 // Find method indices by name. If a method with the specified name is |
500 // found the index to the first method is returned, and 'end' is filled in | |
501 // with the index of first non-name-matching method. If no method is found | |
502 // -1 is returned. | |
503 int find_method_by_name(Symbol* name, int* end); | |
504 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); | |
505 | |
0 | 506 // constant pool |
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507 ConstantPool* constants() const { return _constants; } |
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508 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 509 |
510 // protection domain | |
511 oop protection_domain() { return _protection_domain; } | |
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512 void set_protection_domain(oop pd) { klass_oop_store(&_protection_domain, pd); } |
0 | 513 |
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514 // host class |
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515 Klass* host_klass() const { |
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516 Klass** hk = (Klass**)adr_host_klass(); |
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517 if (hk == NULL) { |
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518 return NULL; |
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519 } else { |
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520 return *hk; |
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521 } |
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522 } |
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523 void set_host_klass(Klass* host) { |
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524 assert(is_anonymous(), "not anonymous"); |
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525 Klass** addr = (Klass**)adr_host_klass(); |
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526 assert(addr != NULL, "no reversed space"); |
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527 *addr = host; |
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528 } |
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529 bool is_anonymous() const { |
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530 return (_misc_flags & _misc_is_anonymous) != 0; |
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531 } |
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532 void set_is_anonymous(bool value) { |
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533 if (value) { |
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534 _misc_flags |= _misc_is_anonymous; |
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535 } else { |
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536 _misc_flags &= ~_misc_is_anonymous; |
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537 } |
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538 } |
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539 |
0 | 540 // signers |
541 objArrayOop signers() const { return _signers; } | |
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542 void set_signers(objArrayOop s) { klass_oop_store((oop*)&_signers, s); } |
0 | 543 |
544 // source file name | |
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545 Symbol* source_file_name() const { return _source_file_name; } |
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546 void set_source_file_name(Symbol* n); |
0 | 547 |
548 // minor and major version numbers of class file | |
549 u2 minor_version() const { return _minor_version; } | |
550 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
551 u2 major_version() const { return _major_version; } | |
552 void set_major_version(u2 major_version) { _major_version = major_version; } | |
553 | |
554 // source debug extension | |
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555 char* source_debug_extension() const { return _source_debug_extension; } |
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556 void set_source_debug_extension(char* array, int length); |
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557 |
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558 // symbol unloading support (refcount already added) |
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559 Symbol* array_name() { return _array_name; } |
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560 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; } |
0 | 561 |
562 // nonstatic oop-map blocks | |
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563 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 564 return oop_map_count * OopMapBlock::size_in_words(); |
565 } | |
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566 unsigned int nonstatic_oop_map_count() const { |
938 | 567 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
568 } | |
569 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
570 void set_nonstatic_oop_map_size(int words) { | |
571 _nonstatic_oop_map_size = words; | |
572 } | |
0 | 573 |
574 // RedefineClasses() support for previous versions: | |
575 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
576 int emcp_method_count); | |
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577 // If the _previous_versions array is non-NULL, then this klass |
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578 // has been redefined at least once even if we aren't currently |
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579 // tracking a previous version. |
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580 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 581 bool has_previous_version() const; |
582 void init_previous_versions() { | |
583 _previous_versions = NULL; | |
584 } | |
585 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
586 return _previous_versions; | |
587 } | |
588 | |
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589 static void purge_previous_versions(InstanceKlass* ik); |
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590 |
0 | 591 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation |
592 void set_cached_class_file(unsigned char *class_file_bytes, | |
593 jint class_file_len) { _cached_class_file_len = class_file_len; | |
594 _cached_class_file_bytes = class_file_bytes; } | |
595 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
596 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
597 | |
598 // JVMTI: Support for caching of field indices, types, and offsets | |
599 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
600 _jvmti_cached_class_field_map = descriptor; | |
601 } | |
602 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
603 return _jvmti_cached_class_field_map; | |
604 } | |
605 | |
6934 | 606 bool has_default_methods() const { return _has_default_methods; } |
607 void set_has_default_methods(bool b) { _has_default_methods = b; } | |
608 | |
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609 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
0 | 610 inline u2 next_method_idnum(); |
611 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
612 | |
613 // generics support | |
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614 Symbol* generic_signature() const { return _generic_signature; } |
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615 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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616 |
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617 u2 enclosing_method_data(int offset); |
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618 u2 enclosing_method_class_index() { |
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619 return enclosing_method_data(enclosing_method_class_index_offset); |
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620 } |
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621 u2 enclosing_method_method_index() { |
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622 return enclosing_method_data(enclosing_method_method_index_offset); |
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623 } |
0 | 624 void set_enclosing_method_indices(u2 class_index, |
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625 u2 method_index); |
0 | 626 |
627 // jmethodID support | |
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628 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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629 methodHandle method_h); |
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630 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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631 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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632 jmethodID* to_dealloc_id_p, |
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633 jmethodID** to_dealloc_jmeths_p); |
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634 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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635 size_t *length_p, jmethodID* id_p); |
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636 jmethodID jmethod_id_or_null(Method* method); |
0 | 637 |
638 // cached itable index support | |
639 void set_cached_itable_index(size_t idnum, int index); | |
640 int cached_itable_index(size_t idnum); | |
641 | |
642 // annotations support | |
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643 Annotations* annotations() const { return _annotations; } |
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644 void set_annotations(Annotations* anno) { _annotations = anno; } |
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645 AnnotationArray* class_annotations() const { |
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646 if (annotations() == NULL) return NULL; |
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647 return annotations()->class_annotations(); |
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648 } |
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649 Array<AnnotationArray*>* fields_annotations() const { |
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650 if (annotations() == NULL) return NULL; |
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651 return annotations()->fields_annotations(); |
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652 } |
0 | 653 |
654 // allocation | |
655 instanceOop allocate_instance(TRAPS); | |
656 | |
657 // additional member function to return a handle | |
658 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
659 | |
660 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
661 // Helper function | |
662 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
663 | |
664 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
665 // if not, throw either an Error or an Exception. | |
666 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
667 | |
668 // initialization | |
669 void call_class_initializer(TRAPS); | |
670 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
671 | |
672 // OopMapCache support | |
673 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
674 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
675 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
676 | |
677 // JNI identifier support (for static fields - for jni performance) | |
678 JNIid* jni_ids() { return _jni_ids; } | |
679 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
680 JNIid* jni_id_for(int offset); | |
681 | |
682 // maintenance of deoptimization dependencies | |
683 int mark_dependent_nmethods(DepChange& changes); | |
684 void add_dependent_nmethod(nmethod* nm); | |
685 void remove_dependent_nmethod(nmethod* nm); | |
686 | |
687 // On-stack replacement support | |
688 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
689 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
690 void add_osr_nmethod(nmethod* n); | |
691 void remove_osr_nmethod(nmethod* n); | |
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692 nmethod* lookup_osr_nmethod(Method* const m, int bci, int level, bool match_level) const; |
0 | 693 |
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694 // Breakpoint support (see methods on Method* for details) |
0 | 695 BreakpointInfo* breakpoints() const { return _breakpoints; }; |
696 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
697 | |
698 // support for stub routines | |
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699 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
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700 TRACE_DEFINE_OFFSET; |
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701 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
0 | 702 |
703 // subclass/subinterface checks | |
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704 bool implements_interface(Klass* k) const; |
0 | 705 |
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706 // Access to the implementor of an interface. |
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707 Klass* implementor() const |
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708 { |
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709 Klass** k = adr_implementor(); |
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710 if (k == NULL) { |
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711 return NULL; |
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712 } else { |
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713 return *k; |
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714 } |
0 | 715 } |
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716 |
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717 void set_implementor(Klass* k) { |
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718 assert(is_interface(), "not interface"); |
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719 Klass** addr = adr_implementor(); |
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720 *addr = k; |
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721 } |
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722 |
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723 int nof_implementors() const { |
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724 Klass* k = implementor(); |
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725 if (k == NULL) { |
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726 return 0; |
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727 } else if (k != this) { |
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728 return 1; |
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729 } else { |
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730 return 2; |
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731 } |
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732 } |
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733 |
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734 void add_implementor(Klass* k); // k is a new class that implements this interface |
0 | 735 void init_implementor(); // initialize |
736 | |
737 // link this class into the implementors list of every interface it implements | |
738 void process_interfaces(Thread *thread); | |
739 | |
740 // virtual operations from Klass | |
741 bool is_leaf_class() const { return _subklass == NULL; } | |
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742 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
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743 bool compute_is_subtype_of(Klass* k); |
0 | 744 bool can_be_primary_super_slow() const; |
745 int oop_size(oop obj) const { return size_helper(); } | |
746 bool oop_is_instance_slow() const { return true; } | |
747 | |
748 // Iterators | |
749 void do_local_static_fields(FieldClosure* cl); | |
750 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
751 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
752 | |
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753 void methods_do(void f(Method* method)); |
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754 void array_klasses_do(void f(Klass* k)); |
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755 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
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756 void with_array_klasses_do(void f(Klass* k)); |
0 | 757 bool super_types_do(SuperTypeClosure* blk); |
758 | |
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759 // Casting from Klass* |
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760 static InstanceKlass* cast(Klass* k) { |
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761 assert(k->is_klass(), "must be"); |
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762 assert(k->oop_is_instance(), "cast to InstanceKlass"); |
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763 return (InstanceKlass*) k; |
0 | 764 } |
765 | |
6934 | 766 InstanceKlass* java_super() const { |
767 return (super() == NULL) ? NULL : cast(super()); | |
768 } | |
769 | |
0 | 770 // Sizing (in words) |
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771 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } |
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772 static int size(int vtable_length, int itable_length, |
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773 int nonstatic_oop_map_size, |
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774 bool is_interface, bool is_anonymous) { |
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775 return align_object_size(header_size() + |
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776 align_object_offset(vtable_length) + |
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777 align_object_offset(itable_length) + |
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778 ((is_interface || is_anonymous) ? |
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779 align_object_offset(nonstatic_oop_map_size) : |
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780 nonstatic_oop_map_size) + |
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781 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + |
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782 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); |
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783 } |
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784 int size() const { return size(vtable_length(), |
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785 itable_length(), |
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786 nonstatic_oop_map_size(), |
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787 is_interface(), |
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788 is_anonymous()); |
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789 } |
5998
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790 |
0 | 791 static int vtable_start_offset() { return header_size(); } |
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792 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } |
0 | 793 |
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794 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } |
0 | 795 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } |
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796 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
0 | 797 |
798 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
799 | |
2376
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800 address static_field_addr(int offset); |
113
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801 |
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802 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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803 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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804 } |
0 | 805 |
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806 Klass** adr_implementor() const { |
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807 if (is_interface()) { |
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808 return (Klass**)(start_of_nonstatic_oop_maps() + |
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809 nonstatic_oop_map_count()); |
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810 } else { |
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811 return NULL; |
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812 } |
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813 }; |
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814 |
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815 Klass** adr_host_klass() const { |
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816 if (is_anonymous()) { |
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817 Klass** adr_impl = adr_implementor(); |
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818 if (adr_impl != NULL) { |
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819 return adr_impl + 1; |
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820 } else { |
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821 return (Klass**)(start_of_nonstatic_oop_maps() + |
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822 nonstatic_oop_map_count()); |
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823 } |
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824 } else { |
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825 return NULL; |
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826 } |
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827 } |
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828 |
0 | 829 // Allocation profiling support |
830 juint alloc_size() const { return _alloc_count * size_helper(); } | |
831 void set_alloc_size(juint n) {} | |
832 | |
833 // Use this to return the size of an instance in heap words: | |
834 int size_helper() const { | |
835 return layout_helper_to_size_helper(layout_helper()); | |
836 } | |
837 | |
838 // This bit is initialized in classFileParser.cpp. | |
839 // It is false under any of the following conditions: | |
840 // - the class is abstract (including any interface) | |
841 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
842 // - the class size is larger than FastAllocateSizeLimit | |
843 // - the class is java/lang/Class, which cannot be allocated directly | |
844 bool can_be_fastpath_allocated() const { | |
845 return !layout_helper_needs_slow_path(layout_helper()); | |
846 } | |
847 | |
848 // Java vtable/itable | |
849 klassVtable* vtable() const; // return new klassVtable wrapper | |
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850 inline Method* method_at_vtable(int index); |
0 | 851 klassItable* itable() const; // return new klassItable wrapper |
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852 Method* method_at_itable(Klass* holder, int index, TRAPS); |
0 | 853 |
854 // Garbage collection | |
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855 virtual void oops_do(OopClosure* cl); |
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856 |
0 | 857 void oop_follow_contents(oop obj); |
858 int oop_adjust_pointers(oop obj); | |
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859 |
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860 void clean_implementors_list(BoolObjectClosure* is_alive); |
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861 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 862 |
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863 // Explicit metaspace deallocation of fields |
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864 // For RedefineClasses, we need to deallocate instanceKlasses |
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865 void deallocate_contents(ClassLoaderData* loader_data); |
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866 |
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867 // The constant pool is on stack if any of the methods are executing or |
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868 // referenced by handles. |
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869 bool on_stack() const { return _constants->on_stack(); } |
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870 |
0 | 871 void release_C_heap_structures(); |
872 | |
873 // Parallel Scavenge and Parallel Old | |
874 PARALLEL_GC_DECLS | |
875 | |
876 // Naming | |
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877 const char* signature_name() const; |
0 | 878 |
879 // Iterators | |
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880 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
0 | 881 return oop_oop_iterate_v(obj, blk); |
882 } | |
883 | |
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884 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 885 return oop_oop_iterate_v_m(obj, blk, mr); |
886 } | |
887 | |
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888 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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889 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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890 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 891 MemRegion mr); |
892 | |
893 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
342
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894 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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895 |
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896 #ifndef SERIALGC |
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897 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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898 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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899 |
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900 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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901 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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902 #endif // !SERIALGC |
0 | 903 |
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904 u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
0 | 905 private: |
906 // initialization state | |
907 #ifdef ASSERT | |
908 void set_init_state(ClassState state); | |
909 #else | |
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910 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 911 #endif |
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912 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 913 void set_init_thread(Thread *thread) { _init_thread = thread; } |
914 | |
977
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915 // The RedefineClasses() API can cause new method idnums to be needed |
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916 // which will cause the caches to grow. Safety requires different |
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917 // cache management logic if the caches can grow instead of just |
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918 // going from NULL to non-NULL. |
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919 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 920 jmethodID* methods_jmethod_ids_acquire() const |
921 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
922 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
923 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
924 | |
925 int* methods_cached_itable_indices_acquire() const | |
926 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
927 void release_set_methods_cached_itable_indices(int* indices) | |
928 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
929 | |
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930 // Lock during initialization |
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931 volatile oop init_lock() const; |
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932 void set_init_lock(oop value) { klass_oop_store(&_init_lock, value); } |
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933 void fence_and_clear_init_lock(); // after fully_initialized |
0 | 934 |
935 // Offsets for memory management | |
936 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
937 oop* adr_signers() const { return (oop*)&this->_signers;} | |
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938 oop* adr_init_lock() const { return (oop*)&this->_init_lock;} |
0 | 939 |
940 // Static methods that are used to implement member methods where an exposed this pointer | |
941 // is needed due to possible GCs | |
942 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
943 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
944 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
945 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
946 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
947 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
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948 static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); |
0 | 949 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); |
950 /* jni_id_for_impl for jfieldID only */ | |
951 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
952 | |
953 // Returns the array class for the n'th dimension | |
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954 Klass* array_klass_impl(bool or_null, int n, TRAPS); |
0 | 955 |
956 // Returns the array class with this class as element type | |
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957 Klass* array_klass_impl(bool or_null, TRAPS); |
0 | 958 |
959 public: | |
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960 // CDS support - remove and restore oops from metadata. Oops are not shared. |
0 | 961 virtual void remove_unshareable_info(); |
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962 virtual void restore_unshareable_info(TRAPS); |
0 | 963 |
964 // jvm support | |
965 jint compute_modifier_flags(TRAPS) const; | |
966 | |
967 public: | |
968 // JVMTI support | |
969 jint jvmti_class_status() const; | |
970 | |
971 public: | |
972 // Printing | |
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973 #ifndef PRODUCT |
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974 void print_on(outputStream* st) const; |
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975 #endif |
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976 void print_value_on(outputStream* st) const; |
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977 |
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978 void oop_print_value_on(oop obj, outputStream* st); |
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979 #ifndef PRODUCT |
0 | 980 void oop_print_on (oop obj, outputStream* st); |
981 | |
982 void print_dependent_nmethods(bool verbose = false); | |
983 bool is_dependent_nmethod(nmethod* nm); | |
984 #endif | |
985 | |
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986 const char* internal_name() const; |
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987 |
0 | 988 // Verification |
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989 void verify_on(outputStream* st); |
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990 |
0 | 991 void oop_verify_on(oop obj, outputStream* st); |
992 }; | |
993 | |
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994 inline Method* InstanceKlass::method_at_vtable(int index) { |
0 | 995 #ifndef PRODUCT |
996 assert(index >= 0, "valid vtable index"); | |
997 if (DebugVtables) { | |
998 verify_vtable_index(index); | |
999 } | |
1000 #endif | |
1001 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
1002 return ve[index].method(); | |
1003 } | |
1004 | |
1005 // for adding methods | |
1006 // UNSET_IDNUM return means no more ids available | |
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1007 inline u2 InstanceKlass::next_method_idnum() { |
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1008 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
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1009 return ConstMethod::UNSET_IDNUM; // no more ids available |
0 | 1010 } else { |
1011 return _idnum_allocated_count++; | |
1012 } | |
1013 } | |
1014 | |
1015 | |
1016 /* JNIid class for jfieldIDs only */ | |
6197 | 1017 class JNIid: public CHeapObj<mtClass> { |
0 | 1018 friend class VMStructs; |
1019 private: | |
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1020 Klass* _holder; |
0 | 1021 JNIid* _next; |
1022 int _offset; | |
1023 #ifdef ASSERT | |
1024 bool _is_static_field_id; | |
1025 #endif | |
1026 | |
1027 public: | |
1028 // Accessors | |
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1029 Klass* holder() const { return _holder; } |
0 | 1030 int offset() const { return _offset; } |
1031 JNIid* next() { return _next; } | |
1032 // Constructor | |
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1033 JNIid(Klass* holder, int offset, JNIid* next); |
0 | 1034 // Identifier lookup |
1035 JNIid* find(int offset); | |
1036 | |
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1037 bool find_local_field(fieldDescriptor* fd) { |
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1038 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1039 } |
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1040 |
0 | 1041 static void deallocate(JNIid* id); |
1042 // Debugging | |
1043 #ifdef ASSERT | |
1044 bool is_static_field_id() const { return _is_static_field_id; } | |
1045 void set_is_static_field_id() { _is_static_field_id = true; } | |
1046 #endif | |
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1047 void verify(Klass* holder); |
0 | 1048 }; |
1049 | |
1050 | |
1051 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1052 // consider compressing this data structure. | |
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1053 // It is currently a simple linked list defined in method.hpp. |
0 | 1054 |
1055 class BreakpointInfo; | |
1056 | |
1057 | |
1058 // A collection point for interesting information about the previous | |
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1059 // version(s) of an InstanceKlass. This class uses weak references to |
0 | 1060 // the information so that the information may be collected as needed |
47
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1061 // by the system. If the information is shared, then a regular |
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1062 // reference must be used because a weak reference would be seen as |
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1063 // collectible. A GrowableArray of PreviousVersionNodes is attached |
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1064 // to the InstanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1065 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1066 private: |
47
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1067 // A shared ConstantPool is never collected so we'll always have |
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1068 // a reference to it so we can update items in the cache. We'll |
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1069 // have a weak reference to a non-shared ConstantPool until all |
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1070 // of the methods (EMCP or obsolete) have been collected; the |
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1071 // non-shared ConstantPool becomes collectible at that point. |
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1072 ConstantPool* _prev_constant_pool; // regular or weak reference |
47
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1073 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1074 |
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1075 // If the previous version of the InstanceKlass doesn't have any |
0 | 1076 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the |
1077 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1078 // have a length of zero. | |
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1079 GrowableArray<Method*>* _prev_EMCP_methods; |
0 | 1080 |
1081 public: | |
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1082 PreviousVersionNode(ConstantPool* prev_constant_pool, bool prev_cp_is_weak, |
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1083 GrowableArray<Method*>* prev_EMCP_methods); |
0 | 1084 ~PreviousVersionNode(); |
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1085 ConstantPool* prev_constant_pool() const { |
0 | 1086 return _prev_constant_pool; |
1087 } | |
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1088 GrowableArray<Method*>* prev_EMCP_methods() const { |
0 | 1089 return _prev_EMCP_methods; |
1090 } | |
1091 }; | |
1092 | |
1093 | |
1094 // A Handle-ized version of PreviousVersionNode. | |
1095 class PreviousVersionInfo : public ResourceObj { | |
1096 private: | |
1097 constantPoolHandle _prev_constant_pool_handle; | |
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1098 // If the previous version of the InstanceKlass doesn't have any |
0 | 1099 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the |
1100 // methods cannot be collected while we hold a handle, | |
1101 // _prev_EMCP_methods should never have a length of zero. | |
1102 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1103 | |
1104 public: | |
1105 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1106 ~PreviousVersionInfo(); | |
1107 constantPoolHandle prev_constant_pool_handle() const { | |
1108 return _prev_constant_pool_handle; | |
1109 } | |
1110 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1111 return _prev_EMCP_method_handles; | |
1112 } | |
1113 }; | |
1114 | |
1115 | |
1116 // Helper object for walking previous versions. This helper cleans up | |
1117 // the Handles that it allocates when the helper object is destroyed. | |
1118 // The PreviousVersionInfo object returned by next_previous_version() | |
1119 // is only valid until a subsequent call to next_previous_version() or | |
1120 // the helper object is destroyed. | |
1121 class PreviousVersionWalker : public StackObj { | |
1122 private: | |
1123 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1124 int _current_index; | |
1125 // Fields for cleaning up when we are done walking the previous versions: | |
1126 // A HandleMark for the PreviousVersionInfo handles: | |
1127 HandleMark _hm; | |
1128 | |
1129 // It would be nice to have a ResourceMark field in this helper also, | |
1130 // but the ResourceMark code says to be careful to delete handles held | |
1131 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1132 // can't guarantee the order in which the fields are destroyed, we | |
1133 // have to let the creator of the PreviousVersionWalker object do | |
1134 // the right thing. Also, adding a ResourceMark here causes an | |
1135 // include loop. | |
1136 | |
1137 // A pointer to the current info object so we can handle the deletes. | |
1138 PreviousVersionInfo * _current_p; | |
1139 | |
1140 public: | |
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1141 PreviousVersionWalker(InstanceKlass *ik); |
0 | 1142 ~PreviousVersionWalker(); |
1143 | |
1144 // Return the interesting information for the next previous version | |
1145 // of the klass. Returns NULL if there are no more previous versions. | |
1146 PreviousVersionInfo* next_previous_version(); | |
1147 }; | |
1972 | 1148 |
3939 | 1149 |
1150 // | |
1151 // nmethodBucket is used to record dependent nmethods for | |
1152 // deoptimization. nmethod dependencies are actually <klass, method> | |
1153 // pairs but we really only care about the klass part for purposes of | |
1154 // finding nmethods which might need to be deoptimized. Instead of | |
1155 // recording the method, a count of how many times a particular nmethod | |
1156 // was recorded is kept. This ensures that any recording errors are | |
1157 // noticed since an nmethod should be removed as many times are it's | |
1158 // added. | |
1159 // | |
6197 | 1160 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1161 friend class VMStructs; |
1162 private: | |
1163 nmethod* _nmethod; | |
1164 int _count; | |
1165 nmethodBucket* _next; | |
1166 | |
1167 public: | |
1168 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1169 _nmethod = nmethod; | |
1170 _next = next; | |
1171 _count = 1; | |
1172 } | |
1173 int count() { return _count; } | |
1174 int increment() { _count += 1; return _count; } | |
1175 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1176 nmethodBucket* next() { return _next; } | |
1177 void set_next(nmethodBucket* b) { _next = b; } | |
1178 nmethod* get_nmethod() { return _nmethod; } | |
1179 }; | |
1180 | |
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1181 // An iterator that's used to access the inner classes indices in the |
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1182 // InstanceKlass::_inner_classes array. |
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1183 class InnerClassesIterator : public StackObj { |
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1184 private: |
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1185 Array<jushort>* _inner_classes; |
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1186 int _length; |
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1187 int _idx; |
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1188 public: |
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1189 |
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1190 InnerClassesIterator(instanceKlassHandle k) { |
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1191 _inner_classes = k->inner_classes(); |
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1192 if (k->inner_classes() != NULL) { |
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1193 _length = _inner_classes->length(); |
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1194 // The inner class array's length should be the multiple of |
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1195 // inner_class_next_offset if it only contains the InnerClasses |
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1196 // attribute data, or it should be |
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1197 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1198 // if it also contains the EnclosingMethod data. |
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1199 assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
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1200 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
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1201 "just checking"); |
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1202 // Remove the enclosing_method portion if exists. |
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1203 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
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1204 _length -= InstanceKlass::enclosing_method_attribute_size; |
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1205 } |
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1206 } else { |
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1207 _length = 0; |
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1208 } |
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1209 _idx = 0; |
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1210 } |
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1211 |
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1212 int length() const { |
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1213 return _length; |
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1214 } |
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1215 |
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1216 void next() { |
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1217 _idx += InstanceKlass::inner_class_next_offset; |
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1218 } |
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1219 |
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1220 bool done() const { |
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1221 return (_idx >= _length); |
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1222 } |
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1223 |
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1224 u2 inner_class_info_index() const { |
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1225 return _inner_classes->at( |
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1226 _idx + InstanceKlass::inner_class_inner_class_info_offset); |
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1227 } |
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1228 |
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1229 void set_inner_class_info_index(u2 index) { |
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1230 _inner_classes->at_put( |
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1231 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
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1232 } |
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1233 |
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1234 u2 outer_class_info_index() const { |
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1235 return _inner_classes->at( |
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1236 _idx + InstanceKlass::inner_class_outer_class_info_offset); |
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1237 } |
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1238 |
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1239 void set_outer_class_info_index(u2 index) { |
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1240 _inner_classes->at_put( |
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1241 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
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1242 } |
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1243 |
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1244 u2 inner_name_index() const { |
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1245 return _inner_classes->at( |
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1246 _idx + InstanceKlass::inner_class_inner_name_offset); |
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1247 } |
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1248 |
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1249 void set_inner_name_index(u2 index) { |
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1250 _inner_classes->at_put( |
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1251 _idx + InstanceKlass::inner_class_inner_name_offset, index); |
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1252 } |
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1253 |
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1254 u2 inner_access_flags() const { |
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1255 return _inner_classes->at( |
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1256 _idx + InstanceKlass::inner_class_access_flags_offset); |
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1257 } |
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1258 }; |
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1259 |
1972 | 1260 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |