Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 10149:d587a5c30bd8
8011803: release_C_heap_structures is never called for anonymous classes.
Summary: Call this function from the ClassLoaderData destructor instead of the system dictionary walk.
Reviewed-by: stefank, mgerdin
author | coleenp |
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date | Wed, 24 Apr 2013 16:19:35 -0400 |
parents | 6337ca4dcad8 |
children | c115fac239eb |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 1997, 2013, 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" | |
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34 #include "runtime/atomic.hpp" |
1972 | 35 #include "runtime/handles.hpp" |
36 #include "runtime/os.hpp" | |
37 #include "utilities/accessFlags.hpp" | |
38 #include "utilities/bitMap.inline.hpp" | |
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39 #include "utilities/macros.hpp" |
1972 | 40 |
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41 // An InstanceKlass is the VM level representation of a Java class. |
0 | 42 // It contains all information needed for at class at execution runtime. |
43 | |
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44 // InstanceKlass layout: |
0 | 45 // [C++ vtbl pointer ] Klass |
46 // [subtype cache ] Klass | |
47 // [instance size ] Klass | |
48 // [java mirror ] Klass | |
49 // [super ] Klass | |
50 // [access_flags ] Klass | |
51 // [name ] Klass | |
52 // [first subklass ] Klass | |
53 // [next sibling ] Klass | |
54 // [array klasses ] | |
55 // [methods ] | |
56 // [local interfaces ] | |
57 // [transitive interfaces ] | |
58 // [fields ] | |
59 // [constants ] | |
60 // [class loader ] | |
61 // [protection domain ] | |
62 // [signers ] | |
63 // [source file name ] | |
64 // [inner classes ] | |
65 // [static field size ] | |
66 // [nonstatic field size ] | |
67 // [static oop fields size ] | |
68 // [nonstatic oop maps size ] | |
69 // [has finalize method ] | |
70 // [deoptimization mark bit ] | |
71 // [initialization state ] | |
72 // [initializing thread ] | |
73 // [Java vtable length ] | |
74 // [oop map cache (stack maps) ] | |
75 // [EMBEDDED Java vtable ] size in words = vtable_len | |
76 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size | |
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77 // The embedded nonstatic oop-map blocks are short pairs (offset, length) |
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78 // indicating where oops are located in instances of this klass. |
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79 // [EMBEDDED implementor of the interface] only exist for interface |
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80 // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) |
0 | 81 |
82 | |
83 // forward declaration for class -- see below for definition | |
84 class SuperTypeClosure; | |
85 class JNIid; | |
86 class jniIdMapBase; | |
87 class BreakpointInfo; | |
88 class fieldDescriptor; | |
89 class DepChange; | |
90 class nmethodBucket; | |
91 class PreviousVersionNode; | |
92 class JvmtiCachedClassFieldMap; | |
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93 class MemberNameTable; |
0 | 94 |
95 // This is used in iterators below. | |
96 class FieldClosure: public StackObj { | |
97 public: | |
98 virtual void do_field(fieldDescriptor* fd) = 0; | |
99 }; | |
100 | |
101 #ifndef PRODUCT | |
102 // Print fields. | |
103 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. | |
104 class FieldPrinter: public FieldClosure { | |
105 oop _obj; | |
106 outputStream* _st; | |
107 public: | |
108 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} | |
109 void do_field(fieldDescriptor* fd); | |
110 }; | |
111 #endif // !PRODUCT | |
112 | |
938 | 113 // ValueObjs embedded in klass. Describes where oops are located in instances of |
114 // this klass. | |
115 class OopMapBlock VALUE_OBJ_CLASS_SPEC { | |
116 public: | |
117 // Byte offset of the first oop mapped by this block. | |
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118 int offset() const { return _offset; } |
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119 void set_offset(int offset) { _offset = offset; } |
938 | 120 |
121 // Number of oops in this block. | |
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122 uint count() const { return _count; } |
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123 void set_count(uint count) { _count = count; } |
938 | 124 |
125 // sizeof(OopMapBlock) in HeapWords. | |
126 static const int size_in_words() { | |
127 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> | |
128 LogHeapWordSize; | |
129 } | |
130 | |
131 private: | |
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132 int _offset; |
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133 uint _count; |
938 | 134 }; |
135 | |
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136 class InstanceKlass: public Klass { |
0 | 137 friend class VMStructs; |
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138 friend class ClassFileParser; |
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139 friend class CompileReplay; |
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140 |
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141 protected: |
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142 // Constructor |
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143 InstanceKlass(int vtable_len, |
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144 int itable_len, |
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145 int static_field_size, |
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146 int nonstatic_oop_map_size, |
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147 ReferenceType rt, |
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148 AccessFlags access_flags, |
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149 bool is_anonymous); |
0 | 150 public: |
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151 static InstanceKlass* allocate_instance_klass( |
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152 ClassLoaderData* loader_data, |
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153 int vtable_len, |
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154 int itable_len, |
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155 int static_field_size, |
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156 int nonstatic_oop_map_size, |
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157 ReferenceType rt, |
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158 AccessFlags access_flags, |
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159 Symbol* name, |
8031 | 160 Klass* super_klass, |
161 bool is_anonymous, | |
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162 TRAPS); |
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163 |
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164 InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
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165 |
0 | 166 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description |
167 // of the class loading & initialization procedure, and the use of the states. | |
168 enum ClassState { | |
169 allocated, // allocated (but not yet linked) | |
170 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
171 linked, // successfully linked/verified (but not initialized yet) | |
172 being_initialized, // currently running class initializer | |
173 fully_initialized, // initialized (successfull final state) | |
174 initialization_error // error happened during initialization | |
175 }; | |
176 | |
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177 static int number_of_instance_classes() { return _total_instanceKlass_count; } |
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178 |
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179 private: |
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180 static volatile int _total_instanceKlass_count; |
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181 |
0 | 182 protected: |
183 // Protection domain. | |
184 oop _protection_domain; | |
185 // Class signers. | |
186 objArrayOop _signers; | |
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187 // Initialization lock. Must be one per class and it has to be a VM internal |
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188 // object so java code cannot lock it (like the mirror) |
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189 // It has to be an object not a Mutex because it's held through java calls. |
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190 volatile oop _init_lock; |
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191 |
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192 // Annotations for this class |
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193 Annotations* _annotations; |
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194 // Array classes holding elements of this class. |
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195 Klass* _array_klasses; |
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196 // Constant pool for this class. |
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197 ConstantPool* _constants; |
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198 // The InnerClasses attribute and EnclosingMethod attribute. The |
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199 // _inner_classes is an array of shorts. If the class has InnerClasses |
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200 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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201 // [inner_class_info_index, outer_class_info_index, |
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202 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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203 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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204 // last two shorts [class_index, method_index] of the array. If only |
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205 // the InnerClasses attribute exists, the _inner_classes array length is |
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206 // number_of_inner_classes * 4. If the class has both InnerClasses |
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207 // and EnclosingMethod attributes the _inner_classes array length is |
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208 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
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209 Array<jushort>* _inner_classes; |
0 | 210 |
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211 // Name of source file containing this klass, NULL if not specified. |
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212 Symbol* _source_file_name; |
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213 // the source debug extension for this klass, NULL if not specified. |
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214 // Specified as UTF-8 string without terminating zero byte in the classfile, |
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215 // it is stored in the instanceklass as a NULL-terminated UTF-8 string |
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216 char* _source_debug_extension; |
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217 // Generic signature, or null if none. |
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218 Symbol* _generic_signature; |
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219 // Array name derived from this class which needs unreferencing |
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220 // if this class is unloaded. |
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221 Symbol* _array_name; |
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222 |
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223 // Number of heapOopSize words used by non-static fields in this klass |
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224 // (including inherited fields but after header_size()). |
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225 int _nonstatic_field_size; |
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226 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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227 u2 _static_oop_field_count;// number of static oop fields in this klass |
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228 u2 _java_fields_count; // The number of declared Java fields |
938 | 229 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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230 |
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231 // _is_marked_dependent can be set concurrently, thus cannot be part of the |
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232 // _misc_flags. |
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233 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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234 |
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235 enum { |
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236 _misc_rewritten = 1 << 0, // methods rewritten. |
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237 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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238 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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239 _misc_is_anonymous = 1 << 3, // has embedded _host_klass field |
7596 | 240 _misc_is_contended = 1 << 4, // marked with contended annotation |
241 _misc_has_default_methods = 1 << 5 // class/superclass/implemented interfaces has default methods | |
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242 }; |
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243 u2 _misc_flags; |
0 | 244 u2 _minor_version; // minor version number of class file |
245 u2 _major_version; // major version number of class file | |
246 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
247 int _vtable_len; // length of Java vtable (in words) | |
248 int _itable_len; // length of Java itable (in words) | |
249 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
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250 MemberNameTable* _member_names; // Member names |
0 | 251 JNIid* _jni_ids; // First JNI identifier for static fields in this class |
252 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
253 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
254 nmethodBucket* _dependencies; // list of dependent nmethods | |
255 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
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256 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
0 | 257 // Array of interesting part(s) of the previous version(s) of this |
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258 // InstanceKlass. See PreviousVersionWalker below. |
0 | 259 GrowableArray<PreviousVersionNode *>* _previous_versions; |
260 // JVMTI fields can be moved to their own structure - see 6315920 | |
261 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
262 jint _cached_class_file_len; // JVMTI: length of above | |
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263 |
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264 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
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265 |
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266 // Class states are defined as ClassState (see above). |
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267 // Place the _init_state here to utilize the unused 2-byte after |
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268 // _idnum_allocated_count. |
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269 u1 _init_state; // state of class |
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270 u1 _reference_type; // reference type |
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271 |
0 | 272 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration |
6934 | 273 |
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274 NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies |
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275 |
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276 // Method array. |
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277 Array<Method*>* _methods; |
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278 // Interface (Klass*s) this class declares locally to implement. |
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279 Array<Klass*>* _local_interfaces; |
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280 // Interface (Klass*s) this class implements transitively. |
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281 Array<Klass*>* _transitive_interfaces; |
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282 // Int array containing the original order of method in the class file (for JVMTI). |
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283 Array<int>* _method_ordering; |
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284 // Instance and static variable information, starts with 6-tuples of shorts |
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285 // [access, name index, sig index, initval index, low_offset, high_offset] |
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286 // for all fields, followed by the generic signature data at the end of |
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287 // the array. Only fields with generic signature attributes have the generic |
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288 // signature data set in the array. The fields array looks like following: |
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289 // |
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290 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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291 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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292 // ... |
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293 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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294 // [generic signature index] |
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295 // [generic signature index] |
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296 // ... |
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297 Array<u2>* _fields; |
0 | 298 |
299 // embedded Java vtable follows here | |
300 // embedded Java itables follows here | |
301 // embedded static fields follows here | |
302 // embedded nonstatic oop-map blocks follows here | |
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303 // embedded implementor of this interface follows here |
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304 // The embedded implementor only exists if the current klass is an |
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305 // iterface. The possible values of the implementor fall into following |
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306 // three cases: |
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307 // NULL: no implementor. |
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308 // A Klass* that's not itself: one implementor. |
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309 // Itsef: more than one implementors. |
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310 // embedded host klass follows here |
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311 // The embedded host klass only exists in an anonymous class for |
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312 // dynamic language support (JSR 292 enabled). The host class grants |
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313 // its access privileges to this class also. The host class is either |
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314 // named, or a previously loaded anonymous class. A non-anonymous class |
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315 // or an anonymous class loaded through normal classloading does not |
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316 // have this embedded field. |
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317 // |
0 | 318 |
319 friend class SystemDictionary; | |
320 | |
321 public: | |
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322 bool has_nonstatic_fields() const { |
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323 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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324 } |
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325 void set_has_nonstatic_fields(bool b) { |
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326 if (b) { |
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327 _misc_flags |= _misc_has_nonstatic_fields; |
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328 } else { |
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329 _misc_flags &= ~_misc_has_nonstatic_fields; |
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330 } |
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331 } |
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332 |
0 | 333 // field sizes |
334 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
335 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
336 | |
337 int static_field_size() const { return _static_field_size; } | |
338 void set_static_field_size(int size) { _static_field_size = size; } | |
339 | |
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340 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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341 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 342 |
343 // Java vtable | |
344 int vtable_length() const { return _vtable_len; } | |
345 void set_vtable_length(int len) { _vtable_len = len; } | |
346 | |
347 // Java itable | |
348 int itable_length() const { return _itable_len; } | |
349 void set_itable_length(int len) { _itable_len = len; } | |
350 | |
351 // array klasses | |
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352 Klass* array_klasses() const { return _array_klasses; } |
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353 void set_array_klasses(Klass* k) { _array_klasses = k; } |
0 | 354 |
355 // methods | |
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356 Array<Method*>* methods() const { return _methods; } |
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357 void set_methods(Array<Method*>* a) { _methods = a; } |
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358 Method* method_with_idnum(int idnum); |
0 | 359 |
360 // method ordering | |
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361 Array<int>* method_ordering() const { return _method_ordering; } |
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362 void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
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363 void copy_method_ordering(intArray* m, TRAPS); |
0 | 364 |
365 // interfaces | |
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366 Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
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367 void set_local_interfaces(Array<Klass*>* a) { |
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368 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
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369 _local_interfaces = a; } |
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370 |
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371 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
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372 void set_transitive_interfaces(Array<Klass*>* a) { |
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373 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
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374 _transitive_interfaces = a; |
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375 } |
0 | 376 |
3938 | 377 private: |
378 friend class fieldDescriptor; | |
379 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
380 | |
381 public: | |
382 int field_offset (int index) const { return field(index)->offset(); } | |
383 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
384 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
385 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
386 | |
387 // Number of Java declared fields | |
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388 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 389 |
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390 Array<u2>* fields() const { return _fields; } |
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391 void set_fields(Array<u2>* f, u2 java_fields_count) { |
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392 guarantee(_fields == NULL || f == NULL, "Just checking"); |
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393 _fields = f; |
3938 | 394 _java_fields_count = java_fields_count; |
0 | 395 } |
396 | |
397 // inner classes | |
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398 Array<u2>* inner_classes() const { return _inner_classes; } |
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399 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
0 | 400 |
401 enum InnerClassAttributeOffset { | |
402 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
403 inner_class_inner_class_info_offset = 0, | |
404 inner_class_outer_class_info_offset = 1, | |
405 inner_class_inner_name_offset = 2, | |
406 inner_class_access_flags_offset = 3, | |
407 inner_class_next_offset = 4 | |
408 }; | |
409 | |
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410 enum EnclosingMethodAttributeOffset { |
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411 enclosing_method_class_index_offset = 0, |
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412 enclosing_method_method_index_offset = 1, |
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413 enclosing_method_attribute_size = 2 |
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414 }; |
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415 |
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416 // method override check |
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417 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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418 |
0 | 419 // package |
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420 bool is_same_class_package(Klass* class2); |
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421 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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422 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 423 |
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424 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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425 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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426 instanceKlassHandle self(THREAD, this); |
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427 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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428 } |
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429 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, |
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430 bool* inner_is_member, TRAPS); |
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431 |
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432 // tell if two classes have the same enclosing class (at package level) |
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433 bool is_same_package_member(Klass* class2, TRAPS) { |
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434 instanceKlassHandle self(THREAD, this); |
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435 return is_same_package_member_impl(self, class2, THREAD); |
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436 } |
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437 static bool is_same_package_member_impl(instanceKlassHandle self, |
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438 Klass* class2, TRAPS); |
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439 |
0 | 440 // initialization state |
441 bool is_loaded() const { return _init_state >= loaded; } | |
442 bool is_linked() const { return _init_state >= linked; } | |
443 bool is_initialized() const { return _init_state == fully_initialized; } | |
444 bool is_not_initialized() const { return _init_state < being_initialized; } | |
445 bool is_being_initialized() const { return _init_state == being_initialized; } | |
446 bool is_in_error_state() const { return _init_state == initialization_error; } | |
447 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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448 ClassState init_state() { return (ClassState)_init_state; } |
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449 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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450 |
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451 // defineClass specified verification |
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452 bool should_verify_class() const { |
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453 return (_misc_flags & _misc_should_verify_class) != 0; |
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454 } |
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455 void set_should_verify_class(bool value) { |
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456 if (value) { |
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457 _misc_flags |= _misc_should_verify_class; |
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458 } else { |
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459 _misc_flags &= ~_misc_should_verify_class; |
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460 } |
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461 } |
0 | 462 |
463 // marking | |
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464 bool is_marked_dependent() const { return _is_marked_dependent; } |
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465 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 466 |
467 // initialization (virtuals from Klass) | |
468 bool should_be_initialized() const; // means that initialize should be called | |
469 void initialize(TRAPS); | |
470 void link_class(TRAPS); | |
471 bool link_class_or_fail(TRAPS); // returns false on failure | |
472 void unlink_class(); | |
473 void rewrite_class(TRAPS); | |
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474 void link_methods(TRAPS); |
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475 Method* class_initializer(); |
0 | 476 |
477 // set the class to initialized if no static initializer is present | |
478 void eager_initialize(Thread *thread); | |
479 | |
480 // reference type | |
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481 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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482 void set_reference_type(ReferenceType t) { |
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483 assert(t == (u1)t, "overflow"); |
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484 _reference_type = (u1)t; |
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485 } |
0 | 486 |
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487 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
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488 |
0 | 489 // find local field, returns true if found |
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490 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 491 // find field in direct superinterfaces, returns the interface in which the field is defined |
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492 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 493 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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494 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 495 // 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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496 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 497 |
498 // find a non-static or static field given its offset within the class. | |
499 bool contains_field_offset(int offset) { | |
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500 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 501 } |
502 | |
503 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
504 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
505 | |
506 // find a local method (returns NULL if not found) | |
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507 Method* find_method(Symbol* name, Symbol* signature) const; |
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508 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
0 | 509 |
510 // lookup operation (returns NULL if not found) | |
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511 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 512 |
513 // lookup a method in all the interfaces that this class implements | |
514 // (returns NULL if not found) | |
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515 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 516 |
6934 | 517 // Find method indices by name. If a method with the specified name is |
518 // found the index to the first method is returned, and 'end' is filled in | |
519 // with the index of first non-name-matching method. If no method is found | |
520 // -1 is returned. | |
521 int find_method_by_name(Symbol* name, int* end); | |
522 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); | |
523 | |
0 | 524 // constant pool |
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525 ConstantPool* constants() const { return _constants; } |
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526 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 527 |
528 // protection domain | |
529 oop protection_domain() { return _protection_domain; } | |
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530 void set_protection_domain(oop pd) { klass_oop_store(&_protection_domain, pd); } |
0 | 531 |
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532 // host class |
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533 Klass* host_klass() const { |
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534 Klass** hk = (Klass**)adr_host_klass(); |
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535 if (hk == NULL) { |
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536 return NULL; |
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537 } else { |
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538 return *hk; |
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539 } |
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540 } |
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541 void set_host_klass(Klass* host) { |
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542 assert(is_anonymous(), "not anonymous"); |
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543 Klass** addr = (Klass**)adr_host_klass(); |
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544 assert(addr != NULL, "no reversed space"); |
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545 if (addr != NULL) { |
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546 *addr = host; |
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547 } |
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548 } |
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549 bool is_anonymous() const { |
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550 return (_misc_flags & _misc_is_anonymous) != 0; |
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551 } |
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552 void set_is_anonymous(bool value) { |
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553 if (value) { |
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554 _misc_flags |= _misc_is_anonymous; |
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555 } else { |
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556 _misc_flags &= ~_misc_is_anonymous; |
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557 } |
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558 } |
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559 |
7409 | 560 // Oop that keeps the metadata for this class from being unloaded |
561 // in places where the metadata is stored in other places, like nmethods | |
562 oop klass_holder() const { | |
563 return is_anonymous() ? java_mirror() : class_loader(); | |
564 } | |
565 | |
7587 | 566 bool is_contended() const { |
567 return (_misc_flags & _misc_is_contended) != 0; | |
568 } | |
569 void set_is_contended(bool value) { | |
570 if (value) { | |
571 _misc_flags |= _misc_is_contended; | |
572 } else { | |
573 _misc_flags &= ~_misc_is_contended; | |
574 } | |
575 } | |
576 | |
0 | 577 // signers |
578 objArrayOop signers() const { return _signers; } | |
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579 void set_signers(objArrayOop s) { klass_oop_store((oop*)&_signers, s); } |
0 | 580 |
581 // source file name | |
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582 Symbol* source_file_name() const { return _source_file_name; } |
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583 void set_source_file_name(Symbol* n); |
0 | 584 |
585 // minor and major version numbers of class file | |
586 u2 minor_version() const { return _minor_version; } | |
587 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
588 u2 major_version() const { return _major_version; } | |
589 void set_major_version(u2 major_version) { _major_version = major_version; } | |
590 | |
591 // source debug extension | |
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592 char* source_debug_extension() const { return _source_debug_extension; } |
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593 void set_source_debug_extension(char* array, int length); |
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594 |
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595 // symbol unloading support (refcount already added) |
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596 Symbol* array_name() { return _array_name; } |
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597 void set_array_name(Symbol* name) { assert(_array_name == NULL || name == NULL, "name already created"); _array_name = name; } |
0 | 598 |
599 // nonstatic oop-map blocks | |
939
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600 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 601 return oop_map_count * OopMapBlock::size_in_words(); |
602 } | |
939
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603 unsigned int nonstatic_oop_map_count() const { |
938 | 604 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
605 } | |
606 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
607 void set_nonstatic_oop_map_size(int words) { | |
608 _nonstatic_oop_map_size = words; | |
609 } | |
0 | 610 |
611 // RedefineClasses() support for previous versions: | |
612 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
613 int emcp_method_count); | |
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614 // If the _previous_versions array is non-NULL, then this klass |
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615 // has been redefined at least once even if we aren't currently |
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616 // tracking a previous version. |
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617 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 618 bool has_previous_version() const; |
619 void init_previous_versions() { | |
620 _previous_versions = NULL; | |
621 } | |
622 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
623 return _previous_versions; | |
624 } | |
625 | |
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626 static void purge_previous_versions(InstanceKlass* ik); |
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627 |
0 | 628 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation |
629 void set_cached_class_file(unsigned char *class_file_bytes, | |
630 jint class_file_len) { _cached_class_file_len = class_file_len; | |
631 _cached_class_file_bytes = class_file_bytes; } | |
632 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
633 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
634 | |
635 // JVMTI: Support for caching of field indices, types, and offsets | |
636 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
637 _jvmti_cached_class_field_map = descriptor; | |
638 } | |
639 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
640 return _jvmti_cached_class_field_map; | |
641 } | |
642 | |
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643 bool has_default_methods() const { |
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644 return (_misc_flags & _misc_has_default_methods) != 0; |
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645 } |
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646 void set_has_default_methods(bool b) { |
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647 if (b) { |
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648 _misc_flags |= _misc_has_default_methods; |
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649 } else { |
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650 _misc_flags &= ~_misc_has_default_methods; |
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651 } |
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652 } |
6934 | 653 |
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654 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
0 | 655 inline u2 next_method_idnum(); |
656 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
657 | |
658 // generics support | |
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659 Symbol* generic_signature() const { return _generic_signature; } |
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660 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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661 |
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662 u2 enclosing_method_data(int offset); |
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663 u2 enclosing_method_class_index() { |
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664 return enclosing_method_data(enclosing_method_class_index_offset); |
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665 } |
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666 u2 enclosing_method_method_index() { |
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667 return enclosing_method_data(enclosing_method_method_index_offset); |
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668 } |
0 | 669 void set_enclosing_method_indices(u2 class_index, |
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670 u2 method_index); |
0 | 671 |
672 // jmethodID support | |
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673 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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674 methodHandle method_h); |
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675 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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676 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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677 jmethodID* to_dealloc_id_p, |
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678 jmethodID** to_dealloc_jmeths_p); |
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679 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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680 size_t *length_p, jmethodID* id_p); |
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681 jmethodID jmethod_id_or_null(Method* method); |
0 | 682 |
683 // cached itable index support | |
684 void set_cached_itable_index(size_t idnum, int index); | |
685 int cached_itable_index(size_t idnum); | |
686 | |
687 // annotations support | |
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688 Annotations* annotations() const { return _annotations; } |
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689 void set_annotations(Annotations* anno) { _annotations = anno; } |
8031 | 690 |
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691 AnnotationArray* class_annotations() const { |
8031 | 692 return (_annotations != NULL) ? _annotations->class_annotations() : NULL; |
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693 } |
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694 Array<AnnotationArray*>* fields_annotations() const { |
8031 | 695 return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; |
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696 } |
8031 | 697 AnnotationArray* class_type_annotations() const { |
698 return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; | |
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699 } |
8031 | 700 Array<AnnotationArray*>* fields_type_annotations() const { |
701 return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; | |
702 } | |
0 | 703 // allocation |
704 instanceOop allocate_instance(TRAPS); | |
705 | |
706 // additional member function to return a handle | |
707 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
708 | |
709 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
710 // Helper function | |
711 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
712 | |
713 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
714 // if not, throw either an Error or an Exception. | |
715 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
716 | |
717 // initialization | |
718 void call_class_initializer(TRAPS); | |
719 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
720 | |
721 // OopMapCache support | |
722 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
723 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
724 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
725 | |
726 // JNI identifier support (for static fields - for jni performance) | |
727 JNIid* jni_ids() { return _jni_ids; } | |
728 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
729 JNIid* jni_id_for(int offset); | |
730 | |
731 // maintenance of deoptimization dependencies | |
732 int mark_dependent_nmethods(DepChange& changes); | |
733 void add_dependent_nmethod(nmethod* nm); | |
734 void remove_dependent_nmethod(nmethod* nm); | |
735 | |
736 // On-stack replacement support | |
737 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
738 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
739 void add_osr_nmethod(nmethod* n); | |
740 void remove_osr_nmethod(nmethod* n); | |
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741 nmethod* lookup_osr_nmethod(Method* const m, int bci, int level, bool match_level) const; |
0 | 742 |
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743 // Breakpoint support (see methods on Method* for details) |
0 | 744 BreakpointInfo* breakpoints() const { return _breakpoints; }; |
745 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
746 | |
747 // support for stub routines | |
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748 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
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749 TRACE_DEFINE_OFFSET; |
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750 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
0 | 751 |
752 // subclass/subinterface checks | |
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753 bool implements_interface(Klass* k) const; |
0 | 754 |
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755 // Access to the implementor of an interface. |
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756 Klass* implementor() const |
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757 { |
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758 Klass** k = adr_implementor(); |
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759 if (k == NULL) { |
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760 return NULL; |
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761 } else { |
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762 return *k; |
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763 } |
0 | 764 } |
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765 |
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766 void set_implementor(Klass* k) { |
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767 assert(is_interface(), "not interface"); |
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768 Klass** addr = adr_implementor(); |
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769 assert(addr != NULL, "null addr"); |
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770 if (addr != NULL) { |
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771 *addr = k; |
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772 } |
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773 } |
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774 |
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775 int nof_implementors() const { |
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776 Klass* k = implementor(); |
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777 if (k == NULL) { |
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778 return 0; |
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779 } else if (k != this) { |
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780 return 1; |
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781 } else { |
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782 return 2; |
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783 } |
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784 } |
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785 |
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786 void add_implementor(Klass* k); // k is a new class that implements this interface |
0 | 787 void init_implementor(); // initialize |
788 | |
789 // link this class into the implementors list of every interface it implements | |
790 void process_interfaces(Thread *thread); | |
791 | |
792 // virtual operations from Klass | |
793 bool is_leaf_class() const { return _subklass == NULL; } | |
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794 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
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795 bool compute_is_subtype_of(Klass* k); |
0 | 796 bool can_be_primary_super_slow() const; |
797 int oop_size(oop obj) const { return size_helper(); } | |
798 bool oop_is_instance_slow() const { return true; } | |
799 | |
800 // Iterators | |
801 void do_local_static_fields(FieldClosure* cl); | |
802 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
803 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
804 | |
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805 void methods_do(void f(Method* method)); |
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806 void array_klasses_do(void f(Klass* k)); |
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807 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
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808 void with_array_klasses_do(void f(Klass* k)); |
0 | 809 bool super_types_do(SuperTypeClosure* blk); |
810 | |
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811 // Casting from Klass* |
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812 static InstanceKlass* cast(Klass* k) { |
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813 assert(k->is_klass(), "must be"); |
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814 assert(k->oop_is_instance(), "cast to InstanceKlass"); |
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815 return (InstanceKlass*) k; |
0 | 816 } |
817 | |
6934 | 818 InstanceKlass* java_super() const { |
819 return (super() == NULL) ? NULL : cast(super()); | |
820 } | |
821 | |
0 | 822 // Sizing (in words) |
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823 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } |
8031 | 824 |
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825 static int size(int vtable_length, int itable_length, |
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826 int nonstatic_oop_map_size, |
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827 bool is_interface, bool is_anonymous) { |
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828 return align_object_size(header_size() + |
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829 align_object_offset(vtable_length) + |
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830 align_object_offset(itable_length) + |
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831 ((is_interface || is_anonymous) ? |
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832 align_object_offset(nonstatic_oop_map_size) : |
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833 nonstatic_oop_map_size) + |
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834 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + |
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835 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); |
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836 } |
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837 int size() const { return size(vtable_length(), |
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838 itable_length(), |
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839 nonstatic_oop_map_size(), |
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840 is_interface(), |
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841 is_anonymous()); |
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842 } |
7956 | 843 #if INCLUDE_SERVICES |
844 virtual void collect_statistics(KlassSizeStats *sz) const; | |
845 #endif | |
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846 |
0 | 847 static int vtable_start_offset() { return header_size(); } |
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848 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } |
0 | 849 |
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850 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } |
0 | 851 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } |
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852 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
0 | 853 |
854 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
855 | |
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856 address static_field_addr(int offset); |
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857 |
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858 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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859 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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860 } |
0 | 861 |
8031 | 862 Klass** end_of_nonstatic_oop_maps() const { |
863 return (Klass**)(start_of_nonstatic_oop_maps() + | |
864 nonstatic_oop_map_count()); | |
865 } | |
866 | |
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867 Klass** adr_implementor() const { |
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868 if (is_interface()) { |
8031 | 869 return (Klass**)end_of_nonstatic_oop_maps(); |
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870 } else { |
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871 return NULL; |
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872 } |
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873 }; |
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874 |
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875 Klass** adr_host_klass() const { |
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876 if (is_anonymous()) { |
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877 Klass** adr_impl = adr_implementor(); |
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878 if (adr_impl != NULL) { |
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879 return adr_impl + 1; |
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880 } else { |
8031 | 881 return end_of_nonstatic_oop_maps(); |
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882 } |
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883 } else { |
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884 return NULL; |
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885 } |
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886 } |
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887 |
0 | 888 // Allocation profiling support |
889 juint alloc_size() const { return _alloc_count * size_helper(); } | |
890 void set_alloc_size(juint n) {} | |
891 | |
892 // Use this to return the size of an instance in heap words: | |
893 int size_helper() const { | |
894 return layout_helper_to_size_helper(layout_helper()); | |
895 } | |
896 | |
897 // This bit is initialized in classFileParser.cpp. | |
898 // It is false under any of the following conditions: | |
899 // - the class is abstract (including any interface) | |
900 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
901 // - the class size is larger than FastAllocateSizeLimit | |
902 // - the class is java/lang/Class, which cannot be allocated directly | |
903 bool can_be_fastpath_allocated() const { | |
904 return !layout_helper_needs_slow_path(layout_helper()); | |
905 } | |
906 | |
907 // Java vtable/itable | |
908 klassVtable* vtable() const; // return new klassVtable wrapper | |
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909 inline Method* method_at_vtable(int index); |
0 | 910 klassItable* itable() const; // return new klassItable wrapper |
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911 Method* method_at_itable(Klass* holder, int index, TRAPS); |
0 | 912 |
913 // Garbage collection | |
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914 virtual void oops_do(OopClosure* cl); |
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915 |
0 | 916 void oop_follow_contents(oop obj); |
917 int oop_adjust_pointers(oop obj); | |
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918 |
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919 void clean_implementors_list(BoolObjectClosure* is_alive); |
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920 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 921 |
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922 // Explicit metaspace deallocation of fields |
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923 // For RedefineClasses and class file parsing errors, we need to deallocate |
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924 // instanceKlasses and the metadata they point to. |
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925 void deallocate_contents(ClassLoaderData* loader_data); |
8719
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926 static void deallocate_methods(ClassLoaderData* loader_data, |
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927 Array<Method*>* methods); |
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928 void static deallocate_interfaces(ClassLoaderData* loader_data, |
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929 Klass* super_klass, |
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930 Array<Klass*>* local_interfaces, |
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931 Array<Klass*>* transitive_interfaces); |
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932 |
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933 // The constant pool is on stack if any of the methods are executing or |
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934 // referenced by handles. |
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935 bool on_stack() const { return _constants->on_stack(); } |
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936 |
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937 // callbacks for actions during class unloading |
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938 static void notify_unload_class(InstanceKlass* ik); |
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939 static void release_C_heap_structures(InstanceKlass* ik); |
0 | 940 |
941 // Parallel Scavenge and Parallel Old | |
942 PARALLEL_GC_DECLS | |
943 | |
944 // Naming | |
1039
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945 const char* signature_name() const; |
0 | 946 |
947 // Iterators | |
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948 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
0 | 949 return oop_oop_iterate_v(obj, blk); |
950 } | |
951 | |
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952 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 953 return oop_oop_iterate_v_m(obj, blk, mr); |
954 } | |
955 | |
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956 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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957 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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958 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 959 MemRegion mr); |
960 | |
961 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
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962 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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963 |
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964 #if INCLUDE_ALL_GCS |
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965 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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966 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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967 |
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968 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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969 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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970 #endif // INCLUDE_ALL_GCS |
0 | 971 |
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972 u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
0 | 973 private: |
974 // initialization state | |
975 #ifdef ASSERT | |
976 void set_init_state(ClassState state); | |
977 #else | |
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978 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 979 #endif |
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980 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 981 void set_init_thread(Thread *thread) { _init_thread = thread; } |
982 | |
977
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983 // The RedefineClasses() API can cause new method idnums to be needed |
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984 // which will cause the caches to grow. Safety requires different |
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985 // cache management logic if the caches can grow instead of just |
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986 // going from NULL to non-NULL. |
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987 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 988 jmethodID* methods_jmethod_ids_acquire() const |
989 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
990 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
991 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
992 | |
993 int* methods_cached_itable_indices_acquire() const | |
994 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
995 void release_set_methods_cached_itable_indices(int* indices) | |
996 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
997 | |
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998 // Lock during initialization |
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999 volatile oop init_lock() const; |
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1000 void set_init_lock(oop value) { klass_oop_store(&_init_lock, value); } |
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1001 void fence_and_clear_init_lock(); // after fully_initialized |
0 | 1002 |
1003 // Offsets for memory management | |
1004 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
1005 oop* adr_signers() const { return (oop*)&this->_signers;} | |
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1006 oop* adr_init_lock() const { return (oop*)&this->_init_lock;} |
0 | 1007 |
1008 // Static methods that are used to implement member methods where an exposed this pointer | |
1009 // is needed due to possible GCs | |
1010 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
1011 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
1012 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
1013 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
1014 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
1015 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
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1016 static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); |
0 | 1017 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); |
1018 /* jni_id_for_impl for jfieldID only */ | |
1019 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
1020 | |
1021 // Returns the array class for the n'th dimension | |
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1022 Klass* array_klass_impl(bool or_null, int n, TRAPS); |
0 | 1023 |
1024 // Returns the array class with this class as element type | |
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1025 Klass* array_klass_impl(bool or_null, TRAPS); |
0 | 1026 |
10149
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1027 // Free CHeap allocated fields. |
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1028 void release_C_heap_structures(); |
0 | 1029 public: |
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1030 // CDS support - remove and restore oops from metadata. Oops are not shared. |
0 | 1031 virtual void remove_unshareable_info(); |
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1032 virtual void restore_unshareable_info(TRAPS); |
0 | 1033 |
1034 // jvm support | |
1035 jint compute_modifier_flags(TRAPS) const; | |
1036 | |
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1037 // JSR-292 support |
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1038 MemberNameTable* member_names() { return _member_names; } |
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1039 void set_member_names(MemberNameTable* member_names) { _member_names = member_names; } |
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1040 void add_member_name(Handle member_name); |
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1041 |
0 | 1042 public: |
1043 // JVMTI support | |
1044 jint jvmti_class_status() const; | |
1045 | |
1046 public: | |
1047 // Printing | |
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1048 #ifndef PRODUCT |
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1049 void print_on(outputStream* st) const; |
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1050 #endif |
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1051 void print_value_on(outputStream* st) const; |
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1052 |
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1053 void oop_print_value_on(oop obj, outputStream* st); |
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1054 |
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1055 #ifndef PRODUCT |
0 | 1056 void oop_print_on (oop obj, outputStream* st); |
1057 | |
1058 void print_dependent_nmethods(bool verbose = false); | |
1059 bool is_dependent_nmethod(nmethod* nm); | |
1060 #endif | |
1061 | |
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1062 const char* internal_name() const; |
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1063 |
0 | 1064 // Verification |
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1065 void verify_on(outputStream* st); |
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1066 |
0 | 1067 void oop_verify_on(oop obj, outputStream* st); |
1068 }; | |
1069 | |
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1070 inline Method* InstanceKlass::method_at_vtable(int index) { |
0 | 1071 #ifndef PRODUCT |
1072 assert(index >= 0, "valid vtable index"); | |
1073 if (DebugVtables) { | |
1074 verify_vtable_index(index); | |
1075 } | |
1076 #endif | |
1077 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
1078 return ve[index].method(); | |
1079 } | |
1080 | |
1081 // for adding methods | |
1082 // UNSET_IDNUM return means no more ids available | |
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1083 inline u2 InstanceKlass::next_method_idnum() { |
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1084 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
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1085 return ConstMethod::UNSET_IDNUM; // no more ids available |
0 | 1086 } else { |
1087 return _idnum_allocated_count++; | |
1088 } | |
1089 } | |
1090 | |
1091 | |
1092 /* JNIid class for jfieldIDs only */ | |
6197 | 1093 class JNIid: public CHeapObj<mtClass> { |
0 | 1094 friend class VMStructs; |
1095 private: | |
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1096 Klass* _holder; |
0 | 1097 JNIid* _next; |
1098 int _offset; | |
1099 #ifdef ASSERT | |
1100 bool _is_static_field_id; | |
1101 #endif | |
1102 | |
1103 public: | |
1104 // Accessors | |
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1105 Klass* holder() const { return _holder; } |
0 | 1106 int offset() const { return _offset; } |
1107 JNIid* next() { return _next; } | |
1108 // Constructor | |
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1109 JNIid(Klass* holder, int offset, JNIid* next); |
0 | 1110 // Identifier lookup |
1111 JNIid* find(int offset); | |
1112 | |
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1113 bool find_local_field(fieldDescriptor* fd) { |
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1114 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1115 } |
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1116 |
0 | 1117 static void deallocate(JNIid* id); |
1118 // Debugging | |
1119 #ifdef ASSERT | |
1120 bool is_static_field_id() const { return _is_static_field_id; } | |
1121 void set_is_static_field_id() { _is_static_field_id = true; } | |
1122 #endif | |
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1123 void verify(Klass* holder); |
0 | 1124 }; |
1125 | |
1126 | |
1127 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1128 // consider compressing this data structure. | |
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1129 // It is currently a simple linked list defined in method.hpp. |
0 | 1130 |
1131 class BreakpointInfo; | |
1132 | |
1133 | |
1134 // A collection point for interesting information about the previous | |
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1135 // version(s) of an InstanceKlass. This class uses weak references to |
0 | 1136 // the information so that the information may be collected as needed |
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1137 // by the system. If the information is shared, then a regular |
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1138 // reference must be used because a weak reference would be seen as |
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1139 // collectible. A GrowableArray of PreviousVersionNodes is attached |
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1140 // to the InstanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1141 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1142 private: |
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1143 // A shared ConstantPool is never collected so we'll always have |
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1144 // a reference to it so we can update items in the cache. We'll |
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1145 // have a weak reference to a non-shared ConstantPool until all |
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1146 // of the methods (EMCP or obsolete) have been collected; the |
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1147 // non-shared ConstantPool becomes collectible at that point. |
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1148 ConstantPool* _prev_constant_pool; // regular or weak reference |
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1149 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1150 |
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1151 // If the previous version of the InstanceKlass doesn't have any |
0 | 1152 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the |
1153 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1154 // have a length of zero. | |
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1155 GrowableArray<Method*>* _prev_EMCP_methods; |
0 | 1156 |
1157 public: | |
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1158 PreviousVersionNode(ConstantPool* prev_constant_pool, bool prev_cp_is_weak, |
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1159 GrowableArray<Method*>* prev_EMCP_methods); |
0 | 1160 ~PreviousVersionNode(); |
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1161 ConstantPool* prev_constant_pool() const { |
0 | 1162 return _prev_constant_pool; |
1163 } | |
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1164 GrowableArray<Method*>* prev_EMCP_methods() const { |
0 | 1165 return _prev_EMCP_methods; |
1166 } | |
1167 }; | |
1168 | |
1169 | |
1170 // A Handle-ized version of PreviousVersionNode. | |
1171 class PreviousVersionInfo : public ResourceObj { | |
1172 private: | |
1173 constantPoolHandle _prev_constant_pool_handle; | |
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1174 // If the previous version of the InstanceKlass doesn't have any |
0 | 1175 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the |
1176 // methods cannot be collected while we hold a handle, | |
1177 // _prev_EMCP_methods should never have a length of zero. | |
1178 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1179 | |
1180 public: | |
1181 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1182 ~PreviousVersionInfo(); | |
1183 constantPoolHandle prev_constant_pool_handle() const { | |
1184 return _prev_constant_pool_handle; | |
1185 } | |
1186 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1187 return _prev_EMCP_method_handles; | |
1188 } | |
1189 }; | |
1190 | |
1191 | |
1192 // Helper object for walking previous versions. This helper cleans up | |
1193 // the Handles that it allocates when the helper object is destroyed. | |
1194 // The PreviousVersionInfo object returned by next_previous_version() | |
1195 // is only valid until a subsequent call to next_previous_version() or | |
1196 // the helper object is destroyed. | |
1197 class PreviousVersionWalker : public StackObj { | |
1198 private: | |
1199 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1200 int _current_index; | |
1201 // Fields for cleaning up when we are done walking the previous versions: | |
1202 // A HandleMark for the PreviousVersionInfo handles: | |
1203 HandleMark _hm; | |
1204 | |
1205 // It would be nice to have a ResourceMark field in this helper also, | |
1206 // but the ResourceMark code says to be careful to delete handles held | |
1207 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1208 // can't guarantee the order in which the fields are destroyed, we | |
1209 // have to let the creator of the PreviousVersionWalker object do | |
1210 // the right thing. Also, adding a ResourceMark here causes an | |
1211 // include loop. | |
1212 | |
1213 // A pointer to the current info object so we can handle the deletes. | |
1214 PreviousVersionInfo * _current_p; | |
1215 | |
1216 public: | |
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1217 PreviousVersionWalker(InstanceKlass *ik); |
0 | 1218 ~PreviousVersionWalker(); |
1219 | |
1220 // Return the interesting information for the next previous version | |
1221 // of the klass. Returns NULL if there are no more previous versions. | |
1222 PreviousVersionInfo* next_previous_version(); | |
1223 }; | |
1972 | 1224 |
3939 | 1225 |
1226 // | |
1227 // nmethodBucket is used to record dependent nmethods for | |
1228 // deoptimization. nmethod dependencies are actually <klass, method> | |
1229 // pairs but we really only care about the klass part for purposes of | |
1230 // finding nmethods which might need to be deoptimized. Instead of | |
1231 // recording the method, a count of how many times a particular nmethod | |
1232 // was recorded is kept. This ensures that any recording errors are | |
1233 // noticed since an nmethod should be removed as many times are it's | |
1234 // added. | |
1235 // | |
6197 | 1236 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1237 friend class VMStructs; |
1238 private: | |
1239 nmethod* _nmethod; | |
1240 int _count; | |
1241 nmethodBucket* _next; | |
1242 | |
1243 public: | |
1244 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1245 _nmethod = nmethod; | |
1246 _next = next; | |
1247 _count = 1; | |
1248 } | |
1249 int count() { return _count; } | |
1250 int increment() { _count += 1; return _count; } | |
1251 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1252 nmethodBucket* next() { return _next; } | |
1253 void set_next(nmethodBucket* b) { _next = b; } | |
1254 nmethod* get_nmethod() { return _nmethod; } | |
1255 }; | |
1256 | |
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1257 // An iterator that's used to access the inner classes indices in the |
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1258 // InstanceKlass::_inner_classes array. |
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1259 class InnerClassesIterator : public StackObj { |
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1260 private: |
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1261 Array<jushort>* _inner_classes; |
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1262 int _length; |
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1263 int _idx; |
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1264 public: |
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1265 |
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1266 InnerClassesIterator(instanceKlassHandle k) { |
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1267 _inner_classes = k->inner_classes(); |
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1268 if (k->inner_classes() != NULL) { |
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1269 _length = _inner_classes->length(); |
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1270 // The inner class array's length should be the multiple of |
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1271 // inner_class_next_offset if it only contains the InnerClasses |
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1272 // attribute data, or it should be |
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1273 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1274 // if it also contains the EnclosingMethod data. |
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1275 assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
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1276 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
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1277 "just checking"); |
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1278 // Remove the enclosing_method portion if exists. |
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1279 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
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1280 _length -= InstanceKlass::enclosing_method_attribute_size; |
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1281 } |
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1282 } else { |
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1283 _length = 0; |
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1284 } |
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1285 _idx = 0; |
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1286 } |
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1287 |
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1288 int length() const { |
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1289 return _length; |
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1290 } |
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1291 |
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1292 void next() { |
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1293 _idx += InstanceKlass::inner_class_next_offset; |
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1294 } |
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1295 |
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1296 bool done() const { |
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1297 return (_idx >= _length); |
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1298 } |
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1299 |
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1300 u2 inner_class_info_index() const { |
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1301 return _inner_classes->at( |
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1302 _idx + InstanceKlass::inner_class_inner_class_info_offset); |
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1303 } |
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1304 |
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1305 void set_inner_class_info_index(u2 index) { |
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1306 _inner_classes->at_put( |
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1307 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
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1308 } |
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1309 |
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1310 u2 outer_class_info_index() const { |
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1311 return _inner_classes->at( |
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1312 _idx + InstanceKlass::inner_class_outer_class_info_offset); |
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1313 } |
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1314 |
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1315 void set_outer_class_info_index(u2 index) { |
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1316 _inner_classes->at_put( |
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1317 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
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1318 } |
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1319 |
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1320 u2 inner_name_index() const { |
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1321 return _inner_classes->at( |
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1322 _idx + InstanceKlass::inner_class_inner_name_offset); |
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1323 } |
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1324 |
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1325 void set_inner_name_index(u2 index) { |
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1326 _inner_classes->at_put( |
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1327 _idx + InstanceKlass::inner_class_inner_name_offset, index); |
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1328 } |
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1329 |
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1330 u2 inner_access_flags() const { |
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1331 return _inner_classes->at( |
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1332 _idx + InstanceKlass::inner_class_access_flags_offset); |
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1333 } |
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1334 }; |
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1335 |
1972 | 1336 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |