Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 12225:cc5b40a76049
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author | bdelsart |
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date | Wed, 18 Sep 2013 21:47:51 -0700 |
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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" |
10405 | 29 #include "memory/referenceType.hpp" |
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30 #include "oops/annotations.hpp" |
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31 #include "oops/constMethod.hpp" |
3938 | 32 #include "oops/fieldInfo.hpp" |
1972 | 33 #include "oops/instanceOop.hpp" |
34 #include "oops/klassVtable.hpp" | |
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35 #include "runtime/atomic.hpp" |
1972 | 36 #include "runtime/handles.hpp" |
37 #include "runtime/os.hpp" | |
38 #include "utilities/accessFlags.hpp" | |
39 #include "utilities/bitMap.inline.hpp" | |
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40 #include "utilities/macros.hpp" |
10405 | 41 #include "trace/traceMacros.hpp" |
1972 | 42 |
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43 // An InstanceKlass is the VM level representation of a Java class. |
0 | 44 // It contains all information needed for at class at execution runtime. |
45 | |
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46 // InstanceKlass layout: |
0 | 47 // [C++ vtbl pointer ] Klass |
48 // [subtype cache ] Klass | |
49 // [instance size ] Klass | |
50 // [java mirror ] Klass | |
51 // [super ] Klass | |
52 // [access_flags ] Klass | |
53 // [name ] Klass | |
54 // [first subklass ] Klass | |
55 // [next sibling ] Klass | |
56 // [array klasses ] | |
57 // [methods ] | |
58 // [local interfaces ] | |
59 // [transitive interfaces ] | |
60 // [fields ] | |
61 // [constants ] | |
62 // [class loader ] | |
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 struct JvmtiCachedClassFileData; |
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137 |
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138 class InstanceKlass: public Klass { |
0 | 139 friend class VMStructs; |
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140 friend class ClassFileParser; |
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141 friend class CompileReplay; |
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142 |
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143 protected: |
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144 // Constructor |
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145 InstanceKlass(int vtable_len, |
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146 int itable_len, |
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147 int static_field_size, |
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148 int nonstatic_oop_map_size, |
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149 ReferenceType rt, |
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150 AccessFlags access_flags, |
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151 bool is_anonymous); |
0 | 152 public: |
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153 static InstanceKlass* allocate_instance_klass( |
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154 ClassLoaderData* loader_data, |
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155 int vtable_len, |
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156 int itable_len, |
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157 int static_field_size, |
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158 int nonstatic_oop_map_size, |
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159 ReferenceType rt, |
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160 AccessFlags access_flags, |
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161 Symbol* name, |
8031 | 162 Klass* super_klass, |
163 bool is_anonymous, | |
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164 TRAPS); |
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165 |
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166 InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
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167 |
0 | 168 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description |
169 // of the class loading & initialization procedure, and the use of the states. | |
170 enum ClassState { | |
171 allocated, // allocated (but not yet linked) | |
172 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
173 linked, // successfully linked/verified (but not initialized yet) | |
174 being_initialized, // currently running class initializer | |
175 fully_initialized, // initialized (successfull final state) | |
176 initialization_error // error happened during initialization | |
177 }; | |
178 | |
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179 static int number_of_instance_classes() { return _total_instanceKlass_count; } |
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180 |
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181 private: |
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182 static volatile int _total_instanceKlass_count; |
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183 |
0 | 184 protected: |
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185 // Annotations for this class |
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186 Annotations* _annotations; |
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187 // Array classes holding elements of this class. |
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188 Klass* _array_klasses; |
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189 // Constant pool for this class. |
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190 ConstantPool* _constants; |
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191 // The InnerClasses attribute and EnclosingMethod attribute. The |
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192 // _inner_classes is an array of shorts. If the class has InnerClasses |
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193 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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194 // [inner_class_info_index, outer_class_info_index, |
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195 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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196 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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197 // last two shorts [class_index, method_index] of the array. If only |
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198 // the InnerClasses attribute exists, the _inner_classes array length is |
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199 // number_of_inner_classes * 4. If the class has both InnerClasses |
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200 // and EnclosingMethod attributes the _inner_classes array length is |
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201 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
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202 Array<jushort>* _inner_classes; |
0 | 203 |
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204 // the source debug extension for this klass, NULL if not specified. |
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205 // Specified as UTF-8 string without terminating zero byte in the classfile, |
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206 // it is stored in the instanceklass as a NULL-terminated UTF-8 string |
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207 char* _source_debug_extension; |
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208 // Array name derived from this class which needs unreferencing |
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209 // if this class is unloaded. |
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210 Symbol* _array_name; |
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211 |
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212 // Number of heapOopSize words used by non-static fields in this klass |
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213 // (including inherited fields but after header_size()). |
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214 int _nonstatic_field_size; |
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215 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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216 // Constant pool index to the utf8 entry of the Generic signature, |
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217 // or 0 if none. |
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218 u2 _generic_signature_index; |
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219 // Constant pool index to the utf8 entry for the name of source file |
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220 // containing this klass, 0 if not specified. |
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221 u2 _source_file_name_index; |
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222 u2 _static_oop_field_count;// number of static oop fields in this klass |
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223 u2 _java_fields_count; // The number of declared Java fields |
938 | 224 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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225 |
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226 // _is_marked_dependent can be set concurrently, thus cannot be part of the |
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227 // _misc_flags. |
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228 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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229 |
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230 enum { |
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231 _misc_rewritten = 1 << 0, // methods rewritten. |
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232 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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233 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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234 _misc_is_anonymous = 1 << 3, // has embedded _host_klass field |
7596 | 235 _misc_is_contended = 1 << 4, // marked with contended annotation |
236 _misc_has_default_methods = 1 << 5 // class/superclass/implemented interfaces has default methods | |
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237 }; |
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238 u2 _misc_flags; |
0 | 239 u2 _minor_version; // minor version number of class file |
240 u2 _major_version; // major version number of class file | |
241 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
242 int _vtable_len; // length of Java vtable (in words) | |
243 int _itable_len; // length of Java itable (in words) | |
244 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
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245 MemberNameTable* _member_names; // Member names |
0 | 246 JNIid* _jni_ids; // First JNI identifier for static fields in this class |
247 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
248 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
249 nmethodBucket* _dependencies; // list of dependent nmethods | |
250 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
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251 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
0 | 252 // Array of interesting part(s) of the previous version(s) of this |
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253 // InstanceKlass. See PreviousVersionWalker below. |
0 | 254 GrowableArray<PreviousVersionNode *>* _previous_versions; |
255 // JVMTI fields can be moved to their own structure - see 6315920 | |
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256 // JVMTI: cached class file, before retransformable agent modified it in CFLH |
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257 JvmtiCachedClassFileData* _cached_class_file; |
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258 |
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259 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
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260 |
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261 // Class states are defined as ClassState (see above). |
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262 // Place the _init_state here to utilize the unused 2-byte after |
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263 // _idnum_allocated_count. |
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264 u1 _init_state; // state of class |
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265 u1 _reference_type; // reference type |
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266 |
0 | 267 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration |
6934 | 268 |
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269 NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies |
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270 |
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271 // Method array. |
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272 Array<Method*>* _methods; |
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273 // Interface (Klass*s) this class declares locally to implement. |
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274 Array<Klass*>* _local_interfaces; |
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275 // Interface (Klass*s) this class implements transitively. |
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276 Array<Klass*>* _transitive_interfaces; |
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277 // Int array containing the original order of method in the class file (for JVMTI). |
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278 Array<int>* _method_ordering; |
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279 // Instance and static variable information, starts with 6-tuples of shorts |
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280 // [access, name index, sig index, initval index, low_offset, high_offset] |
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281 // for all fields, followed by the generic signature data at the end of |
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282 // the array. Only fields with generic signature attributes have the generic |
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283 // signature data set in the array. The fields array looks like following: |
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284 // |
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285 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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286 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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287 // ... |
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288 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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289 // [generic signature index] |
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290 // [generic signature index] |
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291 // ... |
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292 Array<u2>* _fields; |
0 | 293 |
294 // embedded Java vtable follows here | |
295 // embedded Java itables follows here | |
296 // embedded static fields follows here | |
297 // embedded nonstatic oop-map blocks follows here | |
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298 // embedded implementor of this interface follows here |
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299 // The embedded implementor only exists if the current klass is an |
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300 // iterface. The possible values of the implementor fall into following |
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301 // three cases: |
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302 // NULL: no implementor. |
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303 // A Klass* that's not itself: one implementor. |
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304 // Itsef: more than one implementors. |
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305 // embedded host klass follows here |
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306 // The embedded host klass only exists in an anonymous class for |
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307 // dynamic language support (JSR 292 enabled). The host class grants |
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308 // its access privileges to this class also. The host class is either |
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309 // named, or a previously loaded anonymous class. A non-anonymous class |
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310 // or an anonymous class loaded through normal classloading does not |
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311 // have this embedded field. |
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312 // |
0 | 313 |
314 friend class SystemDictionary; | |
315 | |
316 public: | |
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317 bool has_nonstatic_fields() const { |
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318 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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319 } |
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320 void set_has_nonstatic_fields(bool b) { |
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321 if (b) { |
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322 _misc_flags |= _misc_has_nonstatic_fields; |
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323 } else { |
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324 _misc_flags &= ~_misc_has_nonstatic_fields; |
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325 } |
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326 } |
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327 |
0 | 328 // field sizes |
329 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
330 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
331 | |
332 int static_field_size() const { return _static_field_size; } | |
333 void set_static_field_size(int size) { _static_field_size = size; } | |
334 | |
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335 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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336 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 337 |
338 // Java vtable | |
339 int vtable_length() const { return _vtable_len; } | |
340 void set_vtable_length(int len) { _vtable_len = len; } | |
341 | |
342 // Java itable | |
343 int itable_length() const { return _itable_len; } | |
344 void set_itable_length(int len) { _itable_len = len; } | |
345 | |
346 // array klasses | |
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347 Klass* array_klasses() const { return _array_klasses; } |
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348 void set_array_klasses(Klass* k) { _array_klasses = k; } |
0 | 349 |
350 // methods | |
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351 Array<Method*>* methods() const { return _methods; } |
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352 void set_methods(Array<Method*>* a) { _methods = a; } |
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353 Method* method_with_idnum(int idnum); |
0 | 354 |
355 // method ordering | |
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356 Array<int>* method_ordering() const { return _method_ordering; } |
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357 void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
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358 void copy_method_ordering(intArray* m, TRAPS); |
0 | 359 |
360 // interfaces | |
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361 Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
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362 void set_local_interfaces(Array<Klass*>* a) { |
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363 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
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364 _local_interfaces = a; } |
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365 |
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366 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
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367 void set_transitive_interfaces(Array<Klass*>* a) { |
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368 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
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369 _transitive_interfaces = a; |
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370 } |
0 | 371 |
3938 | 372 private: |
373 friend class fieldDescriptor; | |
374 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
375 | |
376 public: | |
377 int field_offset (int index) const { return field(index)->offset(); } | |
378 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
379 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
380 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
381 | |
382 // Number of Java declared fields | |
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383 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 384 |
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385 Array<u2>* fields() const { return _fields; } |
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386 void set_fields(Array<u2>* f, u2 java_fields_count) { |
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387 guarantee(_fields == NULL || f == NULL, "Just checking"); |
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388 _fields = f; |
3938 | 389 _java_fields_count = java_fields_count; |
0 | 390 } |
391 | |
392 // inner classes | |
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393 Array<u2>* inner_classes() const { return _inner_classes; } |
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394 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
0 | 395 |
396 enum InnerClassAttributeOffset { | |
397 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
398 inner_class_inner_class_info_offset = 0, | |
399 inner_class_outer_class_info_offset = 1, | |
400 inner_class_inner_name_offset = 2, | |
401 inner_class_access_flags_offset = 3, | |
402 inner_class_next_offset = 4 | |
403 }; | |
404 | |
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405 enum EnclosingMethodAttributeOffset { |
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406 enclosing_method_class_index_offset = 0, |
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407 enclosing_method_method_index_offset = 1, |
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408 enclosing_method_attribute_size = 2 |
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409 }; |
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410 |
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411 // method override check |
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412 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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413 |
0 | 414 // package |
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415 bool is_same_class_package(Klass* class2); |
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416 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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417 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 418 |
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419 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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420 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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421 instanceKlassHandle self(THREAD, this); |
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422 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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423 } |
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424 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, |
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425 bool* inner_is_member, TRAPS); |
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426 |
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427 // tell if two classes have the same enclosing class (at package level) |
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428 bool is_same_package_member(Klass* class2, TRAPS) { |
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429 instanceKlassHandle self(THREAD, this); |
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430 return is_same_package_member_impl(self, class2, THREAD); |
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431 } |
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432 static bool is_same_package_member_impl(instanceKlassHandle self, |
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433 Klass* class2, TRAPS); |
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434 |
0 | 435 // initialization state |
436 bool is_loaded() const { return _init_state >= loaded; } | |
437 bool is_linked() const { return _init_state >= linked; } | |
438 bool is_initialized() const { return _init_state == fully_initialized; } | |
439 bool is_not_initialized() const { return _init_state < being_initialized; } | |
440 bool is_being_initialized() const { return _init_state == being_initialized; } | |
441 bool is_in_error_state() const { return _init_state == initialization_error; } | |
442 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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443 ClassState init_state() { return (ClassState)_init_state; } |
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444 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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445 |
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446 // defineClass specified verification |
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447 bool should_verify_class() const { |
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448 return (_misc_flags & _misc_should_verify_class) != 0; |
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449 } |
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450 void set_should_verify_class(bool value) { |
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451 if (value) { |
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452 _misc_flags |= _misc_should_verify_class; |
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453 } else { |
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454 _misc_flags &= ~_misc_should_verify_class; |
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455 } |
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456 } |
0 | 457 |
458 // marking | |
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459 bool is_marked_dependent() const { return _is_marked_dependent; } |
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460 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 461 |
462 // initialization (virtuals from Klass) | |
463 bool should_be_initialized() const; // means that initialize should be called | |
464 void initialize(TRAPS); | |
465 void link_class(TRAPS); | |
466 bool link_class_or_fail(TRAPS); // returns false on failure | |
467 void unlink_class(); | |
468 void rewrite_class(TRAPS); | |
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469 void link_methods(TRAPS); |
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470 Method* class_initializer(); |
0 | 471 |
472 // set the class to initialized if no static initializer is present | |
473 void eager_initialize(Thread *thread); | |
474 | |
475 // reference type | |
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476 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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477 void set_reference_type(ReferenceType t) { |
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478 assert(t == (u1)t, "overflow"); |
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479 _reference_type = (u1)t; |
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480 } |
0 | 481 |
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482 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
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483 |
0 | 484 // find local field, returns true if found |
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485 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 486 // find field in direct superinterfaces, returns the interface in which the field is defined |
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487 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 488 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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489 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 490 // 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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491 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 492 |
493 // find a non-static or static field given its offset within the class. | |
494 bool contains_field_offset(int offset) { | |
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495 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 496 } |
497 | |
498 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
499 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
500 | |
501 // find a local method (returns NULL if not found) | |
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502 Method* find_method(Symbol* name, Symbol* signature) const; |
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503 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
0 | 504 |
505 // lookup operation (returns NULL if not found) | |
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506 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 507 |
508 // lookup a method in all the interfaces that this class implements | |
509 // (returns NULL if not found) | |
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510 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 511 |
6934 | 512 // Find method indices by name. If a method with the specified name is |
513 // found the index to the first method is returned, and 'end' is filled in | |
514 // with the index of first non-name-matching method. If no method is found | |
515 // -1 is returned. | |
516 int find_method_by_name(Symbol* name, int* end); | |
517 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); | |
518 | |
0 | 519 // constant pool |
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520 ConstantPool* constants() const { return _constants; } |
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521 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 522 |
523 // protection domain | |
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524 oop protection_domain() const; |
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525 |
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526 // signers |
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527 objArrayOop signers() const; |
0 | 528 |
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529 // host class |
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530 Klass* host_klass() const { |
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531 Klass** hk = (Klass**)adr_host_klass(); |
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532 if (hk == NULL) { |
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533 return NULL; |
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534 } else { |
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535 return *hk; |
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536 } |
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537 } |
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538 void set_host_klass(Klass* host) { |
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539 assert(is_anonymous(), "not anonymous"); |
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540 Klass** addr = (Klass**)adr_host_klass(); |
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541 assert(addr != NULL, "no reversed space"); |
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542 if (addr != NULL) { |
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543 *addr = host; |
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544 } |
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545 } |
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546 bool is_anonymous() const { |
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547 return (_misc_flags & _misc_is_anonymous) != 0; |
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548 } |
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549 void set_is_anonymous(bool value) { |
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550 if (value) { |
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551 _misc_flags |= _misc_is_anonymous; |
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552 } else { |
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553 _misc_flags &= ~_misc_is_anonymous; |
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554 } |
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555 } |
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556 |
7409 | 557 // Oop that keeps the metadata for this class from being unloaded |
558 // in places where the metadata is stored in other places, like nmethods | |
559 oop klass_holder() const { | |
560 return is_anonymous() ? java_mirror() : class_loader(); | |
561 } | |
562 | |
7587 | 563 bool is_contended() const { |
564 return (_misc_flags & _misc_is_contended) != 0; | |
565 } | |
566 void set_is_contended(bool value) { | |
567 if (value) { | |
568 _misc_flags |= _misc_is_contended; | |
569 } else { | |
570 _misc_flags &= ~_misc_is_contended; | |
571 } | |
572 } | |
573 | |
0 | 574 // source file name |
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575 Symbol* source_file_name() const { |
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576 return (_source_file_name_index == 0) ? |
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577 (Symbol*)NULL : _constants->symbol_at(_source_file_name_index); |
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578 } |
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579 u2 source_file_name_index() const { |
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580 return _source_file_name_index; |
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581 } |
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582 void set_source_file_name_index(u2 sourcefile_index) { |
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583 _source_file_name_index = sourcefile_index; |
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584 } |
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 | |
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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 |
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630 void set_cached_class_file(JvmtiCachedClassFileData *data) { |
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631 _cached_class_file = data; |
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632 } |
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633 JvmtiCachedClassFileData * get_cached_class_file() { return _cached_class_file; } |
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634 jint get_cached_class_file_len(); |
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635 unsigned char * get_cached_class_file_bytes(); |
0 | 636 |
637 // JVMTI: Support for caching of field indices, types, and offsets | |
638 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
639 _jvmti_cached_class_field_map = descriptor; | |
640 } | |
641 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
642 return _jvmti_cached_class_field_map; | |
643 } | |
644 | |
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645 bool has_default_methods() const { |
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646 return (_misc_flags & _misc_has_default_methods) != 0; |
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647 } |
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648 void set_has_default_methods(bool b) { |
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649 if (b) { |
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650 _misc_flags |= _misc_has_default_methods; |
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651 } else { |
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652 _misc_flags &= ~_misc_has_default_methods; |
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653 } |
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654 } |
6934 | 655 |
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656 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
0 | 657 inline u2 next_method_idnum(); |
658 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
659 | |
660 // generics support | |
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661 Symbol* generic_signature() const { |
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662 return (_generic_signature_index == 0) ? |
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663 (Symbol*)NULL : _constants->symbol_at(_generic_signature_index); |
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664 } |
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665 u2 generic_signature_index() const { |
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666 return _generic_signature_index; |
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667 } |
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668 void set_generic_signature_index(u2 sig_index) { |
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669 _generic_signature_index = sig_index; |
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670 } |
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671 |
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672 u2 enclosing_method_data(int offset); |
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673 u2 enclosing_method_class_index() { |
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674 return enclosing_method_data(enclosing_method_class_index_offset); |
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675 } |
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676 u2 enclosing_method_method_index() { |
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677 return enclosing_method_data(enclosing_method_method_index_offset); |
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678 } |
0 | 679 void set_enclosing_method_indices(u2 class_index, |
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680 u2 method_index); |
0 | 681 |
682 // jmethodID support | |
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683 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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684 methodHandle method_h); |
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685 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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686 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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687 jmethodID* to_dealloc_id_p, |
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688 jmethodID** to_dealloc_jmeths_p); |
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689 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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690 size_t *length_p, jmethodID* id_p); |
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691 jmethodID jmethod_id_or_null(Method* method); |
0 | 692 |
693 // cached itable index support | |
694 void set_cached_itable_index(size_t idnum, int index); | |
695 int cached_itable_index(size_t idnum); | |
696 | |
697 // annotations support | |
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698 Annotations* annotations() const { return _annotations; } |
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699 void set_annotations(Annotations* anno) { _annotations = anno; } |
8031 | 700 |
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701 AnnotationArray* class_annotations() const { |
8031 | 702 return (_annotations != NULL) ? _annotations->class_annotations() : NULL; |
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703 } |
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704 Array<AnnotationArray*>* fields_annotations() const { |
8031 | 705 return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; |
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706 } |
8031 | 707 AnnotationArray* class_type_annotations() const { |
708 return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; | |
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709 } |
8031 | 710 Array<AnnotationArray*>* fields_type_annotations() const { |
711 return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; | |
712 } | |
0 | 713 // allocation |
714 instanceOop allocate_instance(TRAPS); | |
715 | |
716 // additional member function to return a handle | |
717 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
718 | |
719 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
720 // Helper function | |
721 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
722 | |
723 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
724 // if not, throw either an Error or an Exception. | |
725 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
726 | |
727 // initialization | |
728 void call_class_initializer(TRAPS); | |
729 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
730 | |
731 // OopMapCache support | |
732 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
733 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
734 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
735 | |
736 // JNI identifier support (for static fields - for jni performance) | |
737 JNIid* jni_ids() { return _jni_ids; } | |
738 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
739 JNIid* jni_id_for(int offset); | |
740 | |
741 // maintenance of deoptimization dependencies | |
742 int mark_dependent_nmethods(DepChange& changes); | |
743 void add_dependent_nmethod(nmethod* nm); | |
744 void remove_dependent_nmethod(nmethod* nm); | |
745 | |
746 // On-stack replacement support | |
747 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
748 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
749 void add_osr_nmethod(nmethod* n); | |
750 void remove_osr_nmethod(nmethod* n); | |
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751 nmethod* lookup_osr_nmethod(const Method* m, int bci, int level, bool match_level) const; |
0 | 752 |
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753 // Breakpoint support (see methods on Method* for details) |
0 | 754 BreakpointInfo* breakpoints() const { return _breakpoints; }; |
755 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
756 | |
757 // support for stub routines | |
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758 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
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759 TRACE_DEFINE_OFFSET; |
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760 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
0 | 761 |
762 // subclass/subinterface checks | |
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763 bool implements_interface(Klass* k) const; |
0 | 764 |
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765 // Access to the implementor of an interface. |
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766 Klass* implementor() const |
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767 { |
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768 Klass** k = adr_implementor(); |
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769 if (k == NULL) { |
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770 return NULL; |
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771 } else { |
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772 return *k; |
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773 } |
0 | 774 } |
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775 |
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776 void set_implementor(Klass* k) { |
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777 assert(is_interface(), "not interface"); |
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778 Klass** addr = adr_implementor(); |
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779 assert(addr != NULL, "null addr"); |
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780 if (addr != NULL) { |
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781 *addr = k; |
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782 } |
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783 } |
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784 |
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785 int nof_implementors() const { |
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786 Klass* k = implementor(); |
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787 if (k == NULL) { |
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788 return 0; |
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789 } else if (k != this) { |
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790 return 1; |
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791 } else { |
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792 return 2; |
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793 } |
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794 } |
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795 |
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796 void add_implementor(Klass* k); // k is a new class that implements this interface |
0 | 797 void init_implementor(); // initialize |
798 | |
799 // link this class into the implementors list of every interface it implements | |
800 void process_interfaces(Thread *thread); | |
801 | |
802 // virtual operations from Klass | |
803 bool is_leaf_class() const { return _subklass == NULL; } | |
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804 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
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805 bool compute_is_subtype_of(Klass* k); |
0 | 806 bool can_be_primary_super_slow() const; |
807 int oop_size(oop obj) const { return size_helper(); } | |
808 bool oop_is_instance_slow() const { return true; } | |
809 | |
810 // Iterators | |
811 void do_local_static_fields(FieldClosure* cl); | |
812 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
813 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
814 | |
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815 void methods_do(void f(Method* method)); |
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816 void array_klasses_do(void f(Klass* k)); |
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817 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
0 | 818 bool super_types_do(SuperTypeClosure* blk); |
819 | |
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820 // Casting from Klass* |
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821 static InstanceKlass* cast(Klass* k) { |
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822 assert(k->is_klass(), "must be"); |
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823 assert(k->oop_is_instance(), "cast to InstanceKlass"); |
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824 return (InstanceKlass*) k; |
0 | 825 } |
826 | |
6934 | 827 InstanceKlass* java_super() const { |
828 return (super() == NULL) ? NULL : cast(super()); | |
829 } | |
830 | |
0 | 831 // Sizing (in words) |
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832 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } |
8031 | 833 |
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834 static int size(int vtable_length, int itable_length, |
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835 int nonstatic_oop_map_size, |
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836 bool is_interface, bool is_anonymous) { |
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837 return align_object_size(header_size() + |
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838 align_object_offset(vtable_length) + |
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839 align_object_offset(itable_length) + |
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840 ((is_interface || is_anonymous) ? |
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841 align_object_offset(nonstatic_oop_map_size) : |
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842 nonstatic_oop_map_size) + |
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843 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + |
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844 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); |
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845 } |
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846 int size() const { return size(vtable_length(), |
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847 itable_length(), |
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848 nonstatic_oop_map_size(), |
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849 is_interface(), |
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850 is_anonymous()); |
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851 } |
7956 | 852 #if INCLUDE_SERVICES |
853 virtual void collect_statistics(KlassSizeStats *sz) const; | |
854 #endif | |
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855 |
0 | 856 static int vtable_start_offset() { return header_size(); } |
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857 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } |
0 | 858 |
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859 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } |
0 | 860 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } |
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861 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
0 | 862 |
863 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
864 | |
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865 address static_field_addr(int offset); |
113
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866 |
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867 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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868 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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869 } |
0 | 870 |
8031 | 871 Klass** end_of_nonstatic_oop_maps() const { |
872 return (Klass**)(start_of_nonstatic_oop_maps() + | |
873 nonstatic_oop_map_count()); | |
874 } | |
875 | |
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876 Klass** adr_implementor() const { |
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877 if (is_interface()) { |
8031 | 878 return (Klass**)end_of_nonstatic_oop_maps(); |
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879 } else { |
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880 return NULL; |
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881 } |
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882 }; |
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883 |
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884 Klass** adr_host_klass() const { |
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885 if (is_anonymous()) { |
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886 Klass** adr_impl = adr_implementor(); |
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887 if (adr_impl != NULL) { |
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888 return adr_impl + 1; |
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889 } else { |
8031 | 890 return end_of_nonstatic_oop_maps(); |
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891 } |
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892 } else { |
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893 return NULL; |
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894 } |
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895 } |
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896 |
0 | 897 // Use this to return the size of an instance in heap words: |
898 int size_helper() const { | |
899 return layout_helper_to_size_helper(layout_helper()); | |
900 } | |
901 | |
902 // This bit is initialized in classFileParser.cpp. | |
903 // It is false under any of the following conditions: | |
904 // - the class is abstract (including any interface) | |
905 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
906 // - the class size is larger than FastAllocateSizeLimit | |
907 // - the class is java/lang/Class, which cannot be allocated directly | |
908 bool can_be_fastpath_allocated() const { | |
909 return !layout_helper_needs_slow_path(layout_helper()); | |
910 } | |
911 | |
912 // Java vtable/itable | |
913 klassVtable* vtable() const; // return new klassVtable wrapper | |
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914 inline Method* method_at_vtable(int index); |
0 | 915 klassItable* itable() const; // return new klassItable wrapper |
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916 Method* method_at_itable(Klass* holder, int index, TRAPS); |
0 | 917 |
918 // Garbage collection | |
919 void oop_follow_contents(oop obj); | |
920 int oop_adjust_pointers(oop obj); | |
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921 |
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922 void clean_implementors_list(BoolObjectClosure* is_alive); |
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923 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 924 |
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925 // Explicit metaspace deallocation of fields |
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926 // For RedefineClasses and class file parsing errors, we need to deallocate |
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927 // instanceKlasses and the metadata they point to. |
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928 void deallocate_contents(ClassLoaderData* loader_data); |
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929 static void deallocate_methods(ClassLoaderData* loader_data, |
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930 Array<Method*>* methods); |
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931 void static deallocate_interfaces(ClassLoaderData* loader_data, |
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932 Klass* super_klass, |
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933 Array<Klass*>* local_interfaces, |
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934 Array<Klass*>* transitive_interfaces); |
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935 |
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936 // The constant pool is on stack if any of the methods are executing or |
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937 // referenced by handles. |
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938 bool on_stack() const { return _constants->on_stack(); } |
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939 |
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940 // callbacks for actions during class unloading |
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941 static void notify_unload_class(InstanceKlass* ik); |
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942 static void release_C_heap_structures(InstanceKlass* ik); |
0 | 943 |
944 // Parallel Scavenge and Parallel Old | |
945 PARALLEL_GC_DECLS | |
946 | |
947 // Naming | |
1039
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948 const char* signature_name() const; |
0 | 949 |
950 // Iterators | |
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951 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
0 | 952 return oop_oop_iterate_v(obj, blk); |
953 } | |
954 | |
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955 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 956 return oop_oop_iterate_v_m(obj, blk, mr); |
957 } | |
958 | |
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959 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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960 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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961 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 962 MemRegion mr); |
963 | |
964 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
342
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965 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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966 |
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967 #if INCLUDE_ALL_GCS |
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968 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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969 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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970 |
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971 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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972 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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973 #endif // INCLUDE_ALL_GCS |
0 | 974 |
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975 u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
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976 |
0 | 977 private: |
978 // initialization state | |
979 #ifdef ASSERT | |
980 void set_init_state(ClassState state); | |
981 #else | |
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982 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 983 #endif |
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984 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 985 void set_init_thread(Thread *thread) { _init_thread = thread; } |
986 | |
977
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987 // The RedefineClasses() API can cause new method idnums to be needed |
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988 // which will cause the caches to grow. Safety requires different |
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989 // cache management logic if the caches can grow instead of just |
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990 // going from NULL to non-NULL. |
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991 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 992 jmethodID* methods_jmethod_ids_acquire() const |
993 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
994 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
995 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
996 | |
997 int* methods_cached_itable_indices_acquire() const | |
998 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
999 void release_set_methods_cached_itable_indices(int* indices) | |
1000 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
1001 | |
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1002 // Lock during initialization |
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1003 public: |
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1004 // Lock for (1) initialization; (2) access to the ConstantPool of this class. |
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1005 // Must be one per class and it has to be a VM internal object so java code |
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1006 // cannot lock it (like the mirror). |
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1007 // It has to be an object not a Mutex because it's held through java calls. |
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1008 volatile oop init_lock() const; |
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1009 private: |
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(int index, Handle member_name); |
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1044 oop get_member_name(int index); |
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1045 |
0 | 1046 public: |
1047 // JVMTI support | |
1048 jint jvmti_class_status() const; | |
1049 | |
1050 public: | |
1051 // Printing | |
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1052 #ifndef PRODUCT |
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1053 void print_on(outputStream* st) const; |
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1054 #endif |
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1055 void print_value_on(outputStream* st) const; |
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1056 |
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1057 void oop_print_value_on(oop obj, outputStream* st); |
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1058 |
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1059 #ifndef PRODUCT |
0 | 1060 void oop_print_on (oop obj, outputStream* st); |
1061 | |
1062 void print_dependent_nmethods(bool verbose = false); | |
1063 bool is_dependent_nmethod(nmethod* nm); | |
1064 #endif | |
1065 | |
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1066 const char* internal_name() const; |
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1067 |
0 | 1068 // Verification |
11034 | 1069 void verify_on(outputStream* st, bool check_dictionary); |
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1070 |
0 | 1071 void oop_verify_on(oop obj, outputStream* st); |
1072 }; | |
1073 | |
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1074 inline Method* InstanceKlass::method_at_vtable(int index) { |
0 | 1075 #ifndef PRODUCT |
1076 assert(index >= 0, "valid vtable index"); | |
1077 if (DebugVtables) { | |
1078 verify_vtable_index(index); | |
1079 } | |
1080 #endif | |
1081 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
1082 return ve[index].method(); | |
1083 } | |
1084 | |
1085 // for adding methods | |
1086 // UNSET_IDNUM return means no more ids available | |
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1087 inline u2 InstanceKlass::next_method_idnum() { |
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1088 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
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1089 return ConstMethod::UNSET_IDNUM; // no more ids available |
0 | 1090 } else { |
1091 return _idnum_allocated_count++; | |
1092 } | |
1093 } | |
1094 | |
1095 | |
1096 /* JNIid class for jfieldIDs only */ | |
6197 | 1097 class JNIid: public CHeapObj<mtClass> { |
0 | 1098 friend class VMStructs; |
1099 private: | |
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1100 Klass* _holder; |
0 | 1101 JNIid* _next; |
1102 int _offset; | |
1103 #ifdef ASSERT | |
1104 bool _is_static_field_id; | |
1105 #endif | |
1106 | |
1107 public: | |
1108 // Accessors | |
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1109 Klass* holder() const { return _holder; } |
0 | 1110 int offset() const { return _offset; } |
1111 JNIid* next() { return _next; } | |
1112 // Constructor | |
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1113 JNIid(Klass* holder, int offset, JNIid* next); |
0 | 1114 // Identifier lookup |
1115 JNIid* find(int offset); | |
1116 | |
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1117 bool find_local_field(fieldDescriptor* fd) { |
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1118 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1119 } |
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1120 |
0 | 1121 static void deallocate(JNIid* id); |
1122 // Debugging | |
1123 #ifdef ASSERT | |
1124 bool is_static_field_id() const { return _is_static_field_id; } | |
1125 void set_is_static_field_id() { _is_static_field_id = true; } | |
1126 #endif | |
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1127 void verify(Klass* holder); |
0 | 1128 }; |
1129 | |
1130 | |
1131 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1132 // consider compressing this data structure. | |
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1133 // It is currently a simple linked list defined in method.hpp. |
0 | 1134 |
1135 class BreakpointInfo; | |
1136 | |
1137 | |
1138 // A collection point for interesting information about the previous | |
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1139 // version(s) of an InstanceKlass. This class uses weak references to |
0 | 1140 // the information so that the information may be collected as needed |
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1141 // by the system. If the information is shared, then a regular |
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1142 // reference must be used because a weak reference would be seen as |
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1143 // collectible. A GrowableArray of PreviousVersionNodes is attached |
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1144 // to the InstanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1145 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1146 private: |
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1147 // A shared ConstantPool is never collected so we'll always have |
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1148 // a reference to it so we can update items in the cache. We'll |
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1149 // have a weak reference to a non-shared ConstantPool until all |
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1150 // of the methods (EMCP or obsolete) have been collected; the |
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1151 // non-shared ConstantPool becomes collectible at that point. |
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1152 ConstantPool* _prev_constant_pool; // regular or weak reference |
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1153 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1154 |
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1155 // If the previous version of the InstanceKlass doesn't have any |
0 | 1156 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the |
1157 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1158 // have a length of zero. | |
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1159 GrowableArray<Method*>* _prev_EMCP_methods; |
0 | 1160 |
1161 public: | |
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1162 PreviousVersionNode(ConstantPool* prev_constant_pool, bool prev_cp_is_weak, |
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1163 GrowableArray<Method*>* prev_EMCP_methods); |
0 | 1164 ~PreviousVersionNode(); |
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1165 ConstantPool* prev_constant_pool() const { |
0 | 1166 return _prev_constant_pool; |
1167 } | |
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1168 GrowableArray<Method*>* prev_EMCP_methods() const { |
0 | 1169 return _prev_EMCP_methods; |
1170 } | |
1171 }; | |
1172 | |
1173 | |
1174 // A Handle-ized version of PreviousVersionNode. | |
1175 class PreviousVersionInfo : public ResourceObj { | |
1176 private: | |
1177 constantPoolHandle _prev_constant_pool_handle; | |
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1178 // If the previous version of the InstanceKlass doesn't have any |
0 | 1179 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the |
1180 // methods cannot be collected while we hold a handle, | |
1181 // _prev_EMCP_methods should never have a length of zero. | |
1182 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1183 | |
1184 public: | |
1185 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1186 ~PreviousVersionInfo(); | |
1187 constantPoolHandle prev_constant_pool_handle() const { | |
1188 return _prev_constant_pool_handle; | |
1189 } | |
1190 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1191 return _prev_EMCP_method_handles; | |
1192 } | |
1193 }; | |
1194 | |
1195 | |
1196 // Helper object for walking previous versions. This helper cleans up | |
1197 // the Handles that it allocates when the helper object is destroyed. | |
1198 // The PreviousVersionInfo object returned by next_previous_version() | |
1199 // is only valid until a subsequent call to next_previous_version() or | |
1200 // the helper object is destroyed. | |
1201 class PreviousVersionWalker : public StackObj { | |
1202 private: | |
1203 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1204 int _current_index; | |
1205 // Fields for cleaning up when we are done walking the previous versions: | |
1206 // A HandleMark for the PreviousVersionInfo handles: | |
1207 HandleMark _hm; | |
1208 | |
1209 // It would be nice to have a ResourceMark field in this helper also, | |
1210 // but the ResourceMark code says to be careful to delete handles held | |
1211 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1212 // can't guarantee the order in which the fields are destroyed, we | |
1213 // have to let the creator of the PreviousVersionWalker object do | |
1214 // the right thing. Also, adding a ResourceMark here causes an | |
1215 // include loop. | |
1216 | |
1217 // A pointer to the current info object so we can handle the deletes. | |
1218 PreviousVersionInfo * _current_p; | |
1219 | |
1220 public: | |
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1221 PreviousVersionWalker(InstanceKlass *ik); |
0 | 1222 ~PreviousVersionWalker(); |
1223 | |
1224 // Return the interesting information for the next previous version | |
1225 // of the klass. Returns NULL if there are no more previous versions. | |
1226 PreviousVersionInfo* next_previous_version(); | |
1227 }; | |
1972 | 1228 |
3939 | 1229 |
1230 // | |
1231 // nmethodBucket is used to record dependent nmethods for | |
1232 // deoptimization. nmethod dependencies are actually <klass, method> | |
1233 // pairs but we really only care about the klass part for purposes of | |
1234 // finding nmethods which might need to be deoptimized. Instead of | |
1235 // recording the method, a count of how many times a particular nmethod | |
1236 // was recorded is kept. This ensures that any recording errors are | |
1237 // noticed since an nmethod should be removed as many times are it's | |
1238 // added. | |
1239 // | |
6197 | 1240 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1241 friend class VMStructs; |
1242 private: | |
1243 nmethod* _nmethod; | |
1244 int _count; | |
1245 nmethodBucket* _next; | |
1246 | |
1247 public: | |
1248 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1249 _nmethod = nmethod; | |
1250 _next = next; | |
1251 _count = 1; | |
1252 } | |
1253 int count() { return _count; } | |
1254 int increment() { _count += 1; return _count; } | |
1255 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1256 nmethodBucket* next() { return _next; } | |
1257 void set_next(nmethodBucket* b) { _next = b; } | |
1258 nmethod* get_nmethod() { return _nmethod; } | |
1259 }; | |
1260 | |
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1261 // An iterator that's used to access the inner classes indices in the |
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1262 // InstanceKlass::_inner_classes array. |
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1263 class InnerClassesIterator : public StackObj { |
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1264 private: |
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1265 Array<jushort>* _inner_classes; |
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1266 int _length; |
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1267 int _idx; |
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1268 public: |
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1269 |
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1270 InnerClassesIterator(instanceKlassHandle k) { |
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1271 _inner_classes = k->inner_classes(); |
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1272 if (k->inner_classes() != NULL) { |
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1273 _length = _inner_classes->length(); |
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1274 // The inner class array's length should be the multiple of |
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1275 // inner_class_next_offset if it only contains the InnerClasses |
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1276 // attribute data, or it should be |
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1277 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1278 // if it also contains the EnclosingMethod data. |
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1279 assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
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1280 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
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1281 "just checking"); |
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1282 // Remove the enclosing_method portion if exists. |
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1283 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
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1284 _length -= InstanceKlass::enclosing_method_attribute_size; |
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1285 } |
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1286 } else { |
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1287 _length = 0; |
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1288 } |
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1289 _idx = 0; |
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1290 } |
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1291 |
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1292 int length() const { |
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1293 return _length; |
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1294 } |
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1295 |
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1296 void next() { |
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1297 _idx += InstanceKlass::inner_class_next_offset; |
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1298 } |
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1299 |
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1300 bool done() const { |
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1301 return (_idx >= _length); |
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1302 } |
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1303 |
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1304 u2 inner_class_info_index() const { |
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1305 return _inner_classes->at( |
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1306 _idx + InstanceKlass::inner_class_inner_class_info_offset); |
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1307 } |
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1308 |
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1309 void set_inner_class_info_index(u2 index) { |
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1310 _inner_classes->at_put( |
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1311 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
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1312 } |
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1313 |
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1314 u2 outer_class_info_index() const { |
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1315 return _inner_classes->at( |
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1316 _idx + InstanceKlass::inner_class_outer_class_info_offset); |
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1317 } |
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1318 |
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1319 void set_outer_class_info_index(u2 index) { |
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1320 _inner_classes->at_put( |
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1321 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
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1322 } |
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1323 |
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1324 u2 inner_name_index() const { |
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1325 return _inner_classes->at( |
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1326 _idx + InstanceKlass::inner_class_inner_name_offset); |
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1327 } |
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1328 |
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1329 void set_inner_name_index(u2 index) { |
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1330 _inner_classes->at_put( |
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1331 _idx + InstanceKlass::inner_class_inner_name_offset, index); |
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1332 } |
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1333 |
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1334 u2 inner_access_flags() const { |
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1335 return _inner_classes->at( |
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1336 _idx + InstanceKlass::inner_class_access_flags_offset); |
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1337 } |
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1338 }; |
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1339 |
1972 | 1340 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |