Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 10152:c115fac239eb
8008962: NPG: Memory regression: One extra Monitor per ConstantPool
Summary: Re-use InstanceKlass::_init_lock locking ConstantPool as well.
Reviewed-by: dholmes, coleenp, acorn
author | iklam |
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date | Thu, 25 Apr 2013 12:55:49 -0700 |
parents | d587a5c30bd8 |
children | 92ef81e2f571 |
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 // Lock for (1) initialization; (2) access to the ConstantPool of this class. |
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188 // Must be one per class and it has to be a VM internal object so java code |
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189 // cannot lock it (like the mirror). |
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190 // It has to be an object not a Mutex because it's held through java calls. |
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191 volatile oop _init_lock; |
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192 |
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193 // Annotations for this class |
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194 Annotations* _annotations; |
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195 // Array classes holding elements of this class. |
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196 Klass* _array_klasses; |
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197 // Constant pool for this class. |
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198 ConstantPool* _constants; |
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199 // The InnerClasses attribute and EnclosingMethod attribute. The |
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200 // _inner_classes is an array of shorts. If the class has InnerClasses |
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201 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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202 // [inner_class_info_index, outer_class_info_index, |
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203 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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204 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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205 // last two shorts [class_index, method_index] of the array. If only |
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206 // the InnerClasses attribute exists, the _inner_classes array length is |
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207 // number_of_inner_classes * 4. If the class has both InnerClasses |
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208 // and EnclosingMethod attributes the _inner_classes array length is |
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209 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
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210 Array<jushort>* _inner_classes; |
0 | 211 |
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212 // Name of source file containing this klass, NULL if not specified. |
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213 Symbol* _source_file_name; |
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214 // the source debug extension for this klass, NULL if not specified. |
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215 // Specified as UTF-8 string without terminating zero byte in the classfile, |
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216 // it is stored in the instanceklass as a NULL-terminated UTF-8 string |
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217 char* _source_debug_extension; |
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218 // Generic signature, or null if none. |
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219 Symbol* _generic_signature; |
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220 // Array name derived from this class which needs unreferencing |
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221 // if this class is unloaded. |
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222 Symbol* _array_name; |
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223 |
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224 // Number of heapOopSize words used by non-static fields in this klass |
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225 // (including inherited fields but after header_size()). |
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226 int _nonstatic_field_size; |
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227 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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228 u2 _static_oop_field_count;// number of static oop fields in this klass |
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229 u2 _java_fields_count; // The number of declared Java fields |
938 | 230 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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231 |
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232 // _is_marked_dependent can be set concurrently, thus cannot be part of the |
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233 // _misc_flags. |
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234 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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235 |
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236 enum { |
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237 _misc_rewritten = 1 << 0, // methods rewritten. |
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238 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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239 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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240 _misc_is_anonymous = 1 << 3, // has embedded _host_klass field |
7596 | 241 _misc_is_contended = 1 << 4, // marked with contended annotation |
242 _misc_has_default_methods = 1 << 5 // class/superclass/implemented interfaces has default methods | |
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243 }; |
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244 u2 _misc_flags; |
0 | 245 u2 _minor_version; // minor version number of class file |
246 u2 _major_version; // major version number of class file | |
247 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
248 int _vtable_len; // length of Java vtable (in words) | |
249 int _itable_len; // length of Java itable (in words) | |
250 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
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251 MemberNameTable* _member_names; // Member names |
0 | 252 JNIid* _jni_ids; // First JNI identifier for static fields in this class |
253 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
254 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
255 nmethodBucket* _dependencies; // list of dependent nmethods | |
256 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
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257 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
0 | 258 // Array of interesting part(s) of the previous version(s) of this |
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259 // InstanceKlass. See PreviousVersionWalker below. |
0 | 260 GrowableArray<PreviousVersionNode *>* _previous_versions; |
261 // JVMTI fields can be moved to their own structure - see 6315920 | |
262 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
263 jint _cached_class_file_len; // JVMTI: length of above | |
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264 |
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265 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
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266 |
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267 // Class states are defined as ClassState (see above). |
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268 // Place the _init_state here to utilize the unused 2-byte after |
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269 // _idnum_allocated_count. |
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270 u1 _init_state; // state of class |
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271 u1 _reference_type; // reference type |
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272 |
0 | 273 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration |
6934 | 274 |
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275 NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies |
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276 |
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277 // Method array. |
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278 Array<Method*>* _methods; |
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279 // Interface (Klass*s) this class declares locally to implement. |
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280 Array<Klass*>* _local_interfaces; |
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281 // Interface (Klass*s) this class implements transitively. |
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282 Array<Klass*>* _transitive_interfaces; |
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283 // Int array containing the original order of method in the class file (for JVMTI). |
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284 Array<int>* _method_ordering; |
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285 // Instance and static variable information, starts with 6-tuples of shorts |
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286 // [access, name index, sig index, initval index, low_offset, high_offset] |
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287 // for all fields, followed by the generic signature data at the end of |
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288 // the array. Only fields with generic signature attributes have the generic |
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289 // signature data set in the array. The fields array looks like following: |
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290 // |
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291 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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292 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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293 // ... |
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294 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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295 // [generic signature index] |
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296 // [generic signature index] |
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297 // ... |
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298 Array<u2>* _fields; |
0 | 299 |
300 // embedded Java vtable follows here | |
301 // embedded Java itables follows here | |
302 // embedded static fields follows here | |
303 // embedded nonstatic oop-map blocks follows here | |
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304 // embedded implementor of this interface follows here |
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305 // The embedded implementor only exists if the current klass is an |
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306 // iterface. The possible values of the implementor fall into following |
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307 // three cases: |
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308 // NULL: no implementor. |
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309 // A Klass* that's not itself: one implementor. |
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310 // Itsef: more than one implementors. |
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311 // embedded host klass follows here |
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312 // The embedded host klass only exists in an anonymous class for |
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313 // dynamic language support (JSR 292 enabled). The host class grants |
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314 // its access privileges to this class also. The host class is either |
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315 // named, or a previously loaded anonymous class. A non-anonymous class |
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316 // or an anonymous class loaded through normal classloading does not |
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317 // have this embedded field. |
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318 // |
0 | 319 |
320 friend class SystemDictionary; | |
321 | |
322 public: | |
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323 bool has_nonstatic_fields() const { |
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324 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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325 } |
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326 void set_has_nonstatic_fields(bool b) { |
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327 if (b) { |
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328 _misc_flags |= _misc_has_nonstatic_fields; |
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329 } else { |
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330 _misc_flags &= ~_misc_has_nonstatic_fields; |
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331 } |
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332 } |
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333 |
0 | 334 // field sizes |
335 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
336 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
337 | |
338 int static_field_size() const { return _static_field_size; } | |
339 void set_static_field_size(int size) { _static_field_size = size; } | |
340 | |
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341 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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342 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 343 |
344 // Java vtable | |
345 int vtable_length() const { return _vtable_len; } | |
346 void set_vtable_length(int len) { _vtable_len = len; } | |
347 | |
348 // Java itable | |
349 int itable_length() const { return _itable_len; } | |
350 void set_itable_length(int len) { _itable_len = len; } | |
351 | |
352 // array klasses | |
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353 Klass* array_klasses() const { return _array_klasses; } |
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354 void set_array_klasses(Klass* k) { _array_klasses = k; } |
0 | 355 |
356 // methods | |
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357 Array<Method*>* methods() const { return _methods; } |
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358 void set_methods(Array<Method*>* a) { _methods = a; } |
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359 Method* method_with_idnum(int idnum); |
0 | 360 |
361 // method ordering | |
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362 Array<int>* method_ordering() const { return _method_ordering; } |
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363 void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
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364 void copy_method_ordering(intArray* m, TRAPS); |
0 | 365 |
366 // interfaces | |
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367 Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
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368 void set_local_interfaces(Array<Klass*>* a) { |
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369 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
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370 _local_interfaces = a; } |
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371 |
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372 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
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373 void set_transitive_interfaces(Array<Klass*>* a) { |
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374 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
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375 _transitive_interfaces = a; |
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376 } |
0 | 377 |
3938 | 378 private: |
379 friend class fieldDescriptor; | |
380 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
381 | |
382 public: | |
383 int field_offset (int index) const { return field(index)->offset(); } | |
384 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
385 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
386 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
387 | |
388 // Number of Java declared fields | |
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389 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 390 |
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391 Array<u2>* fields() const { return _fields; } |
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392 void set_fields(Array<u2>* f, u2 java_fields_count) { |
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393 guarantee(_fields == NULL || f == NULL, "Just checking"); |
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394 _fields = f; |
3938 | 395 _java_fields_count = java_fields_count; |
0 | 396 } |
397 | |
398 // inner classes | |
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399 Array<u2>* inner_classes() const { return _inner_classes; } |
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400 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
0 | 401 |
402 enum InnerClassAttributeOffset { | |
403 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
404 inner_class_inner_class_info_offset = 0, | |
405 inner_class_outer_class_info_offset = 1, | |
406 inner_class_inner_name_offset = 2, | |
407 inner_class_access_flags_offset = 3, | |
408 inner_class_next_offset = 4 | |
409 }; | |
410 | |
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411 enum EnclosingMethodAttributeOffset { |
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412 enclosing_method_class_index_offset = 0, |
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413 enclosing_method_method_index_offset = 1, |
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414 enclosing_method_attribute_size = 2 |
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415 }; |
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416 |
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417 // method override check |
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418 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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419 |
0 | 420 // package |
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421 bool is_same_class_package(Klass* class2); |
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422 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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423 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 424 |
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425 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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426 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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427 instanceKlassHandle self(THREAD, this); |
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428 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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429 } |
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430 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, |
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431 bool* inner_is_member, TRAPS); |
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432 |
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433 // tell if two classes have the same enclosing class (at package level) |
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434 bool is_same_package_member(Klass* class2, TRAPS) { |
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435 instanceKlassHandle self(THREAD, this); |
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436 return is_same_package_member_impl(self, class2, THREAD); |
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437 } |
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438 static bool is_same_package_member_impl(instanceKlassHandle self, |
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439 Klass* class2, TRAPS); |
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440 |
0 | 441 // initialization state |
442 bool is_loaded() const { return _init_state >= loaded; } | |
443 bool is_linked() const { return _init_state >= linked; } | |
444 bool is_initialized() const { return _init_state == fully_initialized; } | |
445 bool is_not_initialized() const { return _init_state < being_initialized; } | |
446 bool is_being_initialized() const { return _init_state == being_initialized; } | |
447 bool is_in_error_state() const { return _init_state == initialization_error; } | |
448 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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449 ClassState init_state() { return (ClassState)_init_state; } |
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450 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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451 |
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452 // defineClass specified verification |
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453 bool should_verify_class() const { |
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454 return (_misc_flags & _misc_should_verify_class) != 0; |
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455 } |
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456 void set_should_verify_class(bool value) { |
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457 if (value) { |
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458 _misc_flags |= _misc_should_verify_class; |
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459 } else { |
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460 _misc_flags &= ~_misc_should_verify_class; |
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461 } |
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462 } |
0 | 463 |
464 // marking | |
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465 bool is_marked_dependent() const { return _is_marked_dependent; } |
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466 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 467 |
468 // initialization (virtuals from Klass) | |
469 bool should_be_initialized() const; // means that initialize should be called | |
470 void initialize(TRAPS); | |
471 void link_class(TRAPS); | |
472 bool link_class_or_fail(TRAPS); // returns false on failure | |
473 void unlink_class(); | |
474 void rewrite_class(TRAPS); | |
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475 void link_methods(TRAPS); |
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476 Method* class_initializer(); |
0 | 477 |
478 // set the class to initialized if no static initializer is present | |
479 void eager_initialize(Thread *thread); | |
480 | |
481 // reference type | |
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482 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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483 void set_reference_type(ReferenceType t) { |
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484 assert(t == (u1)t, "overflow"); |
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485 _reference_type = (u1)t; |
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486 } |
0 | 487 |
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488 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
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489 |
0 | 490 // find local field, returns true if found |
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491 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 492 // find field in direct superinterfaces, returns the interface in which the field is defined |
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493 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 494 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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495 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 496 // 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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497 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 498 |
499 // find a non-static or static field given its offset within the class. | |
500 bool contains_field_offset(int offset) { | |
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501 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 502 } |
503 | |
504 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
505 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
506 | |
507 // find a local method (returns NULL if not found) | |
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508 Method* find_method(Symbol* name, Symbol* signature) const; |
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509 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
0 | 510 |
511 // lookup operation (returns NULL if not found) | |
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512 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 513 |
514 // lookup a method in all the interfaces that this class implements | |
515 // (returns NULL if not found) | |
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516 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 517 |
6934 | 518 // Find method indices by name. If a method with the specified name is |
519 // found the index to the first method is returned, and 'end' is filled in | |
520 // with the index of first non-name-matching method. If no method is found | |
521 // -1 is returned. | |
522 int find_method_by_name(Symbol* name, int* end); | |
523 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); | |
524 | |
0 | 525 // constant pool |
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526 ConstantPool* constants() const { return _constants; } |
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527 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 528 |
529 // protection domain | |
530 oop protection_domain() { return _protection_domain; } | |
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531 void set_protection_domain(oop pd) { klass_oop_store(&_protection_domain, pd); } |
0 | 532 |
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533 // host class |
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534 Klass* host_klass() const { |
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535 Klass** hk = (Klass**)adr_host_klass(); |
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536 if (hk == NULL) { |
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537 return NULL; |
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538 } else { |
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539 return *hk; |
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540 } |
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541 } |
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542 void set_host_klass(Klass* host) { |
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543 assert(is_anonymous(), "not anonymous"); |
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544 Klass** addr = (Klass**)adr_host_klass(); |
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545 assert(addr != NULL, "no reversed space"); |
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546 if (addr != NULL) { |
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547 *addr = host; |
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548 } |
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549 } |
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550 bool is_anonymous() const { |
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551 return (_misc_flags & _misc_is_anonymous) != 0; |
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552 } |
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553 void set_is_anonymous(bool value) { |
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554 if (value) { |
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555 _misc_flags |= _misc_is_anonymous; |
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556 } else { |
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557 _misc_flags &= ~_misc_is_anonymous; |
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558 } |
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559 } |
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560 |
7409 | 561 // Oop that keeps the metadata for this class from being unloaded |
562 // in places where the metadata is stored in other places, like nmethods | |
563 oop klass_holder() const { | |
564 return is_anonymous() ? java_mirror() : class_loader(); | |
565 } | |
566 | |
7587 | 567 bool is_contended() const { |
568 return (_misc_flags & _misc_is_contended) != 0; | |
569 } | |
570 void set_is_contended(bool value) { | |
571 if (value) { | |
572 _misc_flags |= _misc_is_contended; | |
573 } else { | |
574 _misc_flags &= ~_misc_is_contended; | |
575 } | |
576 } | |
577 | |
0 | 578 // signers |
579 objArrayOop signers() const { return _signers; } | |
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580 void set_signers(objArrayOop s) { klass_oop_store((oop*)&_signers, s); } |
0 | 581 |
582 // source file name | |
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583 Symbol* source_file_name() const { return _source_file_name; } |
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584 void set_source_file_name(Symbol* n); |
0 | 585 |
586 // minor and major version numbers of class file | |
587 u2 minor_version() const { return _minor_version; } | |
588 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
589 u2 major_version() const { return _major_version; } | |
590 void set_major_version(u2 major_version) { _major_version = major_version; } | |
591 | |
592 // source debug extension | |
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593 char* source_debug_extension() const { return _source_debug_extension; } |
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594 void set_source_debug_extension(char* array, int length); |
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595 |
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596 // symbol unloading support (refcount already added) |
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597 Symbol* array_name() { return _array_name; } |
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598 void set_array_name(Symbol* name) { assert(_array_name == NULL || name == NULL, "name already created"); _array_name = name; } |
0 | 599 |
600 // nonstatic oop-map blocks | |
939
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601 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 602 return oop_map_count * OopMapBlock::size_in_words(); |
603 } | |
939
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604 unsigned int nonstatic_oop_map_count() const { |
938 | 605 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
606 } | |
607 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
608 void set_nonstatic_oop_map_size(int words) { | |
609 _nonstatic_oop_map_size = words; | |
610 } | |
0 | 611 |
612 // RedefineClasses() support for previous versions: | |
613 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
614 int emcp_method_count); | |
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615 // If the _previous_versions array is non-NULL, then this klass |
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616 // has been redefined at least once even if we aren't currently |
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617 // tracking a previous version. |
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618 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 619 bool has_previous_version() const; |
620 void init_previous_versions() { | |
621 _previous_versions = NULL; | |
622 } | |
623 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
624 return _previous_versions; | |
625 } | |
626 | |
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627 static void purge_previous_versions(InstanceKlass* ik); |
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628 |
0 | 629 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation |
630 void set_cached_class_file(unsigned char *class_file_bytes, | |
631 jint class_file_len) { _cached_class_file_len = class_file_len; | |
632 _cached_class_file_bytes = class_file_bytes; } | |
633 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
634 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
635 | |
636 // JVMTI: Support for caching of field indices, types, and offsets | |
637 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
638 _jvmti_cached_class_field_map = descriptor; | |
639 } | |
640 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
641 return _jvmti_cached_class_field_map; | |
642 } | |
643 | |
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644 bool has_default_methods() const { |
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645 return (_misc_flags & _misc_has_default_methods) != 0; |
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646 } |
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647 void set_has_default_methods(bool b) { |
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648 if (b) { |
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649 _misc_flags |= _misc_has_default_methods; |
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650 } else { |
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651 _misc_flags &= ~_misc_has_default_methods; |
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652 } |
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653 } |
6934 | 654 |
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655 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
0 | 656 inline u2 next_method_idnum(); |
657 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
658 | |
659 // generics support | |
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660 Symbol* generic_signature() const { return _generic_signature; } |
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661 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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662 |
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663 u2 enclosing_method_data(int offset); |
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664 u2 enclosing_method_class_index() { |
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665 return enclosing_method_data(enclosing_method_class_index_offset); |
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666 } |
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667 u2 enclosing_method_method_index() { |
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668 return enclosing_method_data(enclosing_method_method_index_offset); |
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669 } |
0 | 670 void set_enclosing_method_indices(u2 class_index, |
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671 u2 method_index); |
0 | 672 |
673 // jmethodID support | |
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674 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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675 methodHandle method_h); |
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676 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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677 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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678 jmethodID* to_dealloc_id_p, |
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679 jmethodID** to_dealloc_jmeths_p); |
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680 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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681 size_t *length_p, jmethodID* id_p); |
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682 jmethodID jmethod_id_or_null(Method* method); |
0 | 683 |
684 // cached itable index support | |
685 void set_cached_itable_index(size_t idnum, int index); | |
686 int cached_itable_index(size_t idnum); | |
687 | |
688 // annotations support | |
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689 Annotations* annotations() const { return _annotations; } |
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690 void set_annotations(Annotations* anno) { _annotations = anno; } |
8031 | 691 |
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692 AnnotationArray* class_annotations() const { |
8031 | 693 return (_annotations != NULL) ? _annotations->class_annotations() : NULL; |
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694 } |
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695 Array<AnnotationArray*>* fields_annotations() const { |
8031 | 696 return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; |
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697 } |
8031 | 698 AnnotationArray* class_type_annotations() const { |
699 return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; | |
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700 } |
8031 | 701 Array<AnnotationArray*>* fields_type_annotations() const { |
702 return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; | |
703 } | |
0 | 704 // allocation |
705 instanceOop allocate_instance(TRAPS); | |
706 | |
707 // additional member function to return a handle | |
708 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
709 | |
710 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
711 // Helper function | |
712 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
713 | |
714 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
715 // if not, throw either an Error or an Exception. | |
716 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
717 | |
718 // initialization | |
719 void call_class_initializer(TRAPS); | |
720 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
721 | |
722 // OopMapCache support | |
723 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
724 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
725 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
726 | |
727 // JNI identifier support (for static fields - for jni performance) | |
728 JNIid* jni_ids() { return _jni_ids; } | |
729 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
730 JNIid* jni_id_for(int offset); | |
731 | |
732 // maintenance of deoptimization dependencies | |
733 int mark_dependent_nmethods(DepChange& changes); | |
734 void add_dependent_nmethod(nmethod* nm); | |
735 void remove_dependent_nmethod(nmethod* nm); | |
736 | |
737 // On-stack replacement support | |
738 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
739 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
740 void add_osr_nmethod(nmethod* n); | |
741 void remove_osr_nmethod(nmethod* n); | |
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742 nmethod* lookup_osr_nmethod(Method* const m, int bci, int level, bool match_level) const; |
0 | 743 |
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744 // Breakpoint support (see methods on Method* for details) |
0 | 745 BreakpointInfo* breakpoints() const { return _breakpoints; }; |
746 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
747 | |
748 // support for stub routines | |
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749 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
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750 TRACE_DEFINE_OFFSET; |
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751 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
0 | 752 |
753 // subclass/subinterface checks | |
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754 bool implements_interface(Klass* k) const; |
0 | 755 |
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756 // Access to the implementor of an interface. |
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757 Klass* implementor() const |
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758 { |
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759 Klass** k = adr_implementor(); |
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760 if (k == NULL) { |
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761 return NULL; |
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762 } else { |
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763 return *k; |
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764 } |
0 | 765 } |
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766 |
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767 void set_implementor(Klass* k) { |
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768 assert(is_interface(), "not interface"); |
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769 Klass** addr = adr_implementor(); |
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770 assert(addr != NULL, "null addr"); |
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771 if (addr != NULL) { |
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772 *addr = k; |
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773 } |
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774 } |
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775 |
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776 int nof_implementors() const { |
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777 Klass* k = implementor(); |
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778 if (k == NULL) { |
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779 return 0; |
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780 } else if (k != this) { |
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781 return 1; |
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782 } else { |
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783 return 2; |
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784 } |
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785 } |
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786 |
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787 void add_implementor(Klass* k); // k is a new class that implements this interface |
0 | 788 void init_implementor(); // initialize |
789 | |
790 // link this class into the implementors list of every interface it implements | |
791 void process_interfaces(Thread *thread); | |
792 | |
793 // virtual operations from Klass | |
794 bool is_leaf_class() const { return _subklass == NULL; } | |
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795 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
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796 bool compute_is_subtype_of(Klass* k); |
0 | 797 bool can_be_primary_super_slow() const; |
798 int oop_size(oop obj) const { return size_helper(); } | |
799 bool oop_is_instance_slow() const { return true; } | |
800 | |
801 // Iterators | |
802 void do_local_static_fields(FieldClosure* cl); | |
803 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
804 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
805 | |
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806 void methods_do(void f(Method* method)); |
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807 void array_klasses_do(void f(Klass* k)); |
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808 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
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809 void with_array_klasses_do(void f(Klass* k)); |
0 | 810 bool super_types_do(SuperTypeClosure* blk); |
811 | |
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812 // Casting from Klass* |
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813 static InstanceKlass* cast(Klass* k) { |
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814 assert(k->is_klass(), "must be"); |
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815 assert(k->oop_is_instance(), "cast to InstanceKlass"); |
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816 return (InstanceKlass*) k; |
0 | 817 } |
818 | |
6934 | 819 InstanceKlass* java_super() const { |
820 return (super() == NULL) ? NULL : cast(super()); | |
821 } | |
822 | |
0 | 823 // Sizing (in words) |
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824 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } |
8031 | 825 |
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826 static int size(int vtable_length, int itable_length, |
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827 int nonstatic_oop_map_size, |
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828 bool is_interface, bool is_anonymous) { |
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829 return align_object_size(header_size() + |
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830 align_object_offset(vtable_length) + |
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831 align_object_offset(itable_length) + |
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832 ((is_interface || is_anonymous) ? |
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833 align_object_offset(nonstatic_oop_map_size) : |
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834 nonstatic_oop_map_size) + |
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835 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + |
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836 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); |
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837 } |
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838 int size() const { return size(vtable_length(), |
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839 itable_length(), |
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840 nonstatic_oop_map_size(), |
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841 is_interface(), |
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842 is_anonymous()); |
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843 } |
7956 | 844 #if INCLUDE_SERVICES |
845 virtual void collect_statistics(KlassSizeStats *sz) const; | |
846 #endif | |
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847 |
0 | 848 static int vtable_start_offset() { return header_size(); } |
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849 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } |
0 | 850 |
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851 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } |
0 | 852 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } |
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853 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
0 | 854 |
855 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
856 | |
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857 address static_field_addr(int offset); |
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858 |
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859 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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860 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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861 } |
0 | 862 |
8031 | 863 Klass** end_of_nonstatic_oop_maps() const { |
864 return (Klass**)(start_of_nonstatic_oop_maps() + | |
865 nonstatic_oop_map_count()); | |
866 } | |
867 | |
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868 Klass** adr_implementor() const { |
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869 if (is_interface()) { |
8031 | 870 return (Klass**)end_of_nonstatic_oop_maps(); |
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871 } else { |
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872 return NULL; |
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873 } |
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874 }; |
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875 |
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876 Klass** adr_host_klass() const { |
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877 if (is_anonymous()) { |
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878 Klass** adr_impl = adr_implementor(); |
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879 if (adr_impl != NULL) { |
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880 return adr_impl + 1; |
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881 } else { |
8031 | 882 return end_of_nonstatic_oop_maps(); |
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883 } |
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884 } else { |
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885 return NULL; |
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886 } |
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887 } |
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888 |
0 | 889 // Allocation profiling support |
890 juint alloc_size() const { return _alloc_count * size_helper(); } | |
891 void set_alloc_size(juint n) {} | |
892 | |
893 // Use this to return the size of an instance in heap words: | |
894 int size_helper() const { | |
895 return layout_helper_to_size_helper(layout_helper()); | |
896 } | |
897 | |
898 // This bit is initialized in classFileParser.cpp. | |
899 // It is false under any of the following conditions: | |
900 // - the class is abstract (including any interface) | |
901 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
902 // - the class size is larger than FastAllocateSizeLimit | |
903 // - the class is java/lang/Class, which cannot be allocated directly | |
904 bool can_be_fastpath_allocated() const { | |
905 return !layout_helper_needs_slow_path(layout_helper()); | |
906 } | |
907 | |
908 // Java vtable/itable | |
909 klassVtable* vtable() const; // return new klassVtable wrapper | |
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910 inline Method* method_at_vtable(int index); |
0 | 911 klassItable* itable() const; // return new klassItable wrapper |
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912 Method* method_at_itable(Klass* holder, int index, TRAPS); |
0 | 913 |
914 // Garbage collection | |
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915 virtual void oops_do(OopClosure* cl); |
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916 |
0 | 917 void oop_follow_contents(oop obj); |
918 int oop_adjust_pointers(oop obj); | |
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919 |
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920 void clean_implementors_list(BoolObjectClosure* is_alive); |
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921 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 922 |
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923 // Explicit metaspace deallocation of fields |
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924 // For RedefineClasses and class file parsing errors, we need to deallocate |
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925 // instanceKlasses and the metadata they point to. |
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926 void deallocate_contents(ClassLoaderData* loader_data); |
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927 static void deallocate_methods(ClassLoaderData* loader_data, |
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928 Array<Method*>* methods); |
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929 void static deallocate_interfaces(ClassLoaderData* loader_data, |
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930 Klass* super_klass, |
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931 Array<Klass*>* local_interfaces, |
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932 Array<Klass*>* transitive_interfaces); |
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933 |
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934 // The constant pool is on stack if any of the methods are executing or |
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935 // referenced by handles. |
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936 bool on_stack() const { return _constants->on_stack(); } |
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937 |
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938 // callbacks for actions during class unloading |
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939 static void notify_unload_class(InstanceKlass* ik); |
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940 static void release_C_heap_structures(InstanceKlass* ik); |
0 | 941 |
942 // Parallel Scavenge and Parallel Old | |
943 PARALLEL_GC_DECLS | |
944 | |
945 // Naming | |
1039
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946 const char* signature_name() const; |
0 | 947 |
948 // Iterators | |
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949 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
0 | 950 return oop_oop_iterate_v(obj, blk); |
951 } | |
952 | |
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953 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 954 return oop_oop_iterate_v_m(obj, blk, mr); |
955 } | |
956 | |
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957 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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958 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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959 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 960 MemRegion mr); |
961 | |
962 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
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963 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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964 |
8001
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965 #if INCLUDE_ALL_GCS |
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966 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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967 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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968 |
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969 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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970 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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971 #endif // INCLUDE_ALL_GCS |
0 | 972 |
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973 u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
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974 |
0 | 975 private: |
976 // initialization state | |
977 #ifdef ASSERT | |
978 void set_init_state(ClassState state); | |
979 #else | |
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980 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 981 #endif |
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982 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 983 void set_init_thread(Thread *thread) { _init_thread = thread; } |
984 | |
977
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985 // The RedefineClasses() API can cause new method idnums to be needed |
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986 // which will cause the caches to grow. Safety requires different |
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987 // cache management logic if the caches can grow instead of just |
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988 // going from NULL to non-NULL. |
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989 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 990 jmethodID* methods_jmethod_ids_acquire() const |
991 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
992 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
993 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
994 | |
995 int* methods_cached_itable_indices_acquire() const | |
996 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
997 void release_set_methods_cached_itable_indices(int* indices) | |
998 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
999 | |
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1000 // Lock during initialization |
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1001 public: |
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1002 volatile oop init_lock() const {return _init_lock; } |
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1003 private: |
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1004 void set_init_lock(oop value) { klass_oop_store(&_init_lock, value); } |
0 | 1005 |
1006 // Offsets for memory management | |
1007 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
1008 oop* adr_signers() const { return (oop*)&this->_signers;} | |
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1009 oop* adr_init_lock() const { return (oop*)&this->_init_lock;} |
0 | 1010 |
1011 // Static methods that are used to implement member methods where an exposed this pointer | |
1012 // is needed due to possible GCs | |
1013 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
1014 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
1015 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
1016 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
1017 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
1018 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
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1019 static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); |
0 | 1020 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); |
1021 /* jni_id_for_impl for jfieldID only */ | |
1022 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
1023 | |
1024 // Returns the array class for the n'th dimension | |
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1025 Klass* array_klass_impl(bool or_null, int n, TRAPS); |
0 | 1026 |
1027 // Returns the array class with this class as element type | |
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1028 Klass* array_klass_impl(bool or_null, TRAPS); |
0 | 1029 |
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1030 // Free CHeap allocated fields. |
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1031 void release_C_heap_structures(); |
0 | 1032 public: |
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1033 // CDS support - remove and restore oops from metadata. Oops are not shared. |
0 | 1034 virtual void remove_unshareable_info(); |
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1035 virtual void restore_unshareable_info(TRAPS); |
0 | 1036 |
1037 // jvm support | |
1038 jint compute_modifier_flags(TRAPS) const; | |
1039 | |
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1040 // JSR-292 support |
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1041 MemberNameTable* member_names() { return _member_names; } |
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1042 void set_member_names(MemberNameTable* member_names) { _member_names = member_names; } |
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1043 void add_member_name(Handle member_name); |
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1044 |
0 | 1045 public: |
1046 // JVMTI support | |
1047 jint jvmti_class_status() const; | |
1048 | |
1049 public: | |
1050 // Printing | |
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1051 #ifndef PRODUCT |
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1052 void print_on(outputStream* st) const; |
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1053 #endif |
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1054 void print_value_on(outputStream* st) const; |
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1055 |
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1056 void oop_print_value_on(oop obj, outputStream* st); |
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1057 |
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1058 #ifndef PRODUCT |
0 | 1059 void oop_print_on (oop obj, outputStream* st); |
1060 | |
1061 void print_dependent_nmethods(bool verbose = false); | |
1062 bool is_dependent_nmethod(nmethod* nm); | |
1063 #endif | |
1064 | |
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1065 const char* internal_name() const; |
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1066 |
0 | 1067 // Verification |
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1068 void verify_on(outputStream* st); |
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1069 |
0 | 1070 void oop_verify_on(oop obj, outputStream* st); |
1071 }; | |
1072 | |
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1073 inline Method* InstanceKlass::method_at_vtable(int index) { |
0 | 1074 #ifndef PRODUCT |
1075 assert(index >= 0, "valid vtable index"); | |
1076 if (DebugVtables) { | |
1077 verify_vtable_index(index); | |
1078 } | |
1079 #endif | |
1080 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
1081 return ve[index].method(); | |
1082 } | |
1083 | |
1084 // for adding methods | |
1085 // UNSET_IDNUM return means no more ids available | |
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1086 inline u2 InstanceKlass::next_method_idnum() { |
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1087 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
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1088 return ConstMethod::UNSET_IDNUM; // no more ids available |
0 | 1089 } else { |
1090 return _idnum_allocated_count++; | |
1091 } | |
1092 } | |
1093 | |
1094 | |
1095 /* JNIid class for jfieldIDs only */ | |
6197 | 1096 class JNIid: public CHeapObj<mtClass> { |
0 | 1097 friend class VMStructs; |
1098 private: | |
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1099 Klass* _holder; |
0 | 1100 JNIid* _next; |
1101 int _offset; | |
1102 #ifdef ASSERT | |
1103 bool _is_static_field_id; | |
1104 #endif | |
1105 | |
1106 public: | |
1107 // Accessors | |
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1108 Klass* holder() const { return _holder; } |
0 | 1109 int offset() const { return _offset; } |
1110 JNIid* next() { return _next; } | |
1111 // Constructor | |
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1112 JNIid(Klass* holder, int offset, JNIid* next); |
0 | 1113 // Identifier lookup |
1114 JNIid* find(int offset); | |
1115 | |
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1116 bool find_local_field(fieldDescriptor* fd) { |
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1117 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1118 } |
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1119 |
0 | 1120 static void deallocate(JNIid* id); |
1121 // Debugging | |
1122 #ifdef ASSERT | |
1123 bool is_static_field_id() const { return _is_static_field_id; } | |
1124 void set_is_static_field_id() { _is_static_field_id = true; } | |
1125 #endif | |
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1126 void verify(Klass* holder); |
0 | 1127 }; |
1128 | |
1129 | |
1130 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1131 // consider compressing this data structure. | |
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1132 // It is currently a simple linked list defined in method.hpp. |
0 | 1133 |
1134 class BreakpointInfo; | |
1135 | |
1136 | |
1137 // A collection point for interesting information about the previous | |
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1138 // version(s) of an InstanceKlass. This class uses weak references to |
0 | 1139 // the information so that the information may be collected as needed |
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1140 // by the system. If the information is shared, then a regular |
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1141 // reference must be used because a weak reference would be seen as |
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1142 // collectible. A GrowableArray of PreviousVersionNodes is attached |
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1143 // to the InstanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1144 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1145 private: |
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1146 // A shared ConstantPool is never collected so we'll always have |
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1147 // a reference to it so we can update items in the cache. We'll |
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1148 // have a weak reference to a non-shared ConstantPool until all |
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1149 // of the methods (EMCP or obsolete) have been collected; the |
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1150 // non-shared ConstantPool becomes collectible at that point. |
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1151 ConstantPool* _prev_constant_pool; // regular or weak reference |
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1152 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1153 |
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1154 // If the previous version of the InstanceKlass doesn't have any |
0 | 1155 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the |
1156 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1157 // have a length of zero. | |
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1158 GrowableArray<Method*>* _prev_EMCP_methods; |
0 | 1159 |
1160 public: | |
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1161 PreviousVersionNode(ConstantPool* prev_constant_pool, bool prev_cp_is_weak, |
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1162 GrowableArray<Method*>* prev_EMCP_methods); |
0 | 1163 ~PreviousVersionNode(); |
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1164 ConstantPool* prev_constant_pool() const { |
0 | 1165 return _prev_constant_pool; |
1166 } | |
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1167 GrowableArray<Method*>* prev_EMCP_methods() const { |
0 | 1168 return _prev_EMCP_methods; |
1169 } | |
1170 }; | |
1171 | |
1172 | |
1173 // A Handle-ized version of PreviousVersionNode. | |
1174 class PreviousVersionInfo : public ResourceObj { | |
1175 private: | |
1176 constantPoolHandle _prev_constant_pool_handle; | |
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1177 // If the previous version of the InstanceKlass doesn't have any |
0 | 1178 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the |
1179 // methods cannot be collected while we hold a handle, | |
1180 // _prev_EMCP_methods should never have a length of zero. | |
1181 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1182 | |
1183 public: | |
1184 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1185 ~PreviousVersionInfo(); | |
1186 constantPoolHandle prev_constant_pool_handle() const { | |
1187 return _prev_constant_pool_handle; | |
1188 } | |
1189 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1190 return _prev_EMCP_method_handles; | |
1191 } | |
1192 }; | |
1193 | |
1194 | |
1195 // Helper object for walking previous versions. This helper cleans up | |
1196 // the Handles that it allocates when the helper object is destroyed. | |
1197 // The PreviousVersionInfo object returned by next_previous_version() | |
1198 // is only valid until a subsequent call to next_previous_version() or | |
1199 // the helper object is destroyed. | |
1200 class PreviousVersionWalker : public StackObj { | |
1201 private: | |
1202 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1203 int _current_index; | |
1204 // Fields for cleaning up when we are done walking the previous versions: | |
1205 // A HandleMark for the PreviousVersionInfo handles: | |
1206 HandleMark _hm; | |
1207 | |
1208 // It would be nice to have a ResourceMark field in this helper also, | |
1209 // but the ResourceMark code says to be careful to delete handles held | |
1210 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1211 // can't guarantee the order in which the fields are destroyed, we | |
1212 // have to let the creator of the PreviousVersionWalker object do | |
1213 // the right thing. Also, adding a ResourceMark here causes an | |
1214 // include loop. | |
1215 | |
1216 // A pointer to the current info object so we can handle the deletes. | |
1217 PreviousVersionInfo * _current_p; | |
1218 | |
1219 public: | |
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1220 PreviousVersionWalker(InstanceKlass *ik); |
0 | 1221 ~PreviousVersionWalker(); |
1222 | |
1223 // Return the interesting information for the next previous version | |
1224 // of the klass. Returns NULL if there are no more previous versions. | |
1225 PreviousVersionInfo* next_previous_version(); | |
1226 }; | |
1972 | 1227 |
3939 | 1228 |
1229 // | |
1230 // nmethodBucket is used to record dependent nmethods for | |
1231 // deoptimization. nmethod dependencies are actually <klass, method> | |
1232 // pairs but we really only care about the klass part for purposes of | |
1233 // finding nmethods which might need to be deoptimized. Instead of | |
1234 // recording the method, a count of how many times a particular nmethod | |
1235 // was recorded is kept. This ensures that any recording errors are | |
1236 // noticed since an nmethod should be removed as many times are it's | |
1237 // added. | |
1238 // | |
6197 | 1239 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1240 friend class VMStructs; |
1241 private: | |
1242 nmethod* _nmethod; | |
1243 int _count; | |
1244 nmethodBucket* _next; | |
1245 | |
1246 public: | |
1247 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1248 _nmethod = nmethod; | |
1249 _next = next; | |
1250 _count = 1; | |
1251 } | |
1252 int count() { return _count; } | |
1253 int increment() { _count += 1; return _count; } | |
1254 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1255 nmethodBucket* next() { return _next; } | |
1256 void set_next(nmethodBucket* b) { _next = b; } | |
1257 nmethod* get_nmethod() { return _nmethod; } | |
1258 }; | |
1259 | |
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1260 // An iterator that's used to access the inner classes indices in the |
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1261 // InstanceKlass::_inner_classes array. |
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1262 class InnerClassesIterator : public StackObj { |
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1263 private: |
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1264 Array<jushort>* _inner_classes; |
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1265 int _length; |
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1266 int _idx; |
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1267 public: |
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1268 |
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1269 InnerClassesIterator(instanceKlassHandle k) { |
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1270 _inner_classes = k->inner_classes(); |
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1271 if (k->inner_classes() != NULL) { |
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1272 _length = _inner_classes->length(); |
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1273 // The inner class array's length should be the multiple of |
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1274 // inner_class_next_offset if it only contains the InnerClasses |
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1275 // attribute data, or it should be |
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1276 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1277 // if it also contains the EnclosingMethod data. |
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1278 assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
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1279 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
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1280 "just checking"); |
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1281 // Remove the enclosing_method portion if exists. |
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1282 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
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1283 _length -= InstanceKlass::enclosing_method_attribute_size; |
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1284 } |
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1285 } else { |
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1286 _length = 0; |
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1287 } |
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1288 _idx = 0; |
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1289 } |
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1290 |
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1291 int length() const { |
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1292 return _length; |
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1293 } |
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1294 |
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1295 void next() { |
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1296 _idx += InstanceKlass::inner_class_next_offset; |
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1297 } |
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1298 |
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1299 bool done() const { |
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1300 return (_idx >= _length); |
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1301 } |
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1302 |
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1303 u2 inner_class_info_index() const { |
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1304 return _inner_classes->at( |
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1305 _idx + InstanceKlass::inner_class_inner_class_info_offset); |
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1306 } |
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1307 |
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1308 void set_inner_class_info_index(u2 index) { |
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1309 _inner_classes->at_put( |
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1310 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
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1311 } |
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1312 |
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1313 u2 outer_class_info_index() const { |
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1314 return _inner_classes->at( |
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1315 _idx + InstanceKlass::inner_class_outer_class_info_offset); |
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1316 } |
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1317 |
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1318 void set_outer_class_info_index(u2 index) { |
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1319 _inner_classes->at_put( |
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1320 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
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1321 } |
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1322 |
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1323 u2 inner_name_index() const { |
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1324 return _inner_classes->at( |
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1325 _idx + InstanceKlass::inner_class_inner_name_offset); |
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1326 } |
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1327 |
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1328 void set_inner_name_index(u2 index) { |
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1329 _inner_classes->at_put( |
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1330 _idx + InstanceKlass::inner_class_inner_name_offset, index); |
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1331 } |
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1332 |
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1333 u2 inner_access_flags() const { |
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1334 return _inner_classes->at( |
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1335 _idx + InstanceKlass::inner_class_access_flags_offset); |
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1336 } |
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1337 }; |
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1338 |
1972 | 1339 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |