Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceKlass.hpp @ 12364:651cc32247d7
Add Graal option for deferring write barriers of eden allocated objects
author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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date | Fri, 11 Oct 2013 17:06:18 +0200 |
parents | 6b0fd0964b87 |
children | cefad50507d8 |
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" |
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 // Name of source file containing this klass, NULL if not specified. |
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205 Symbol* _source_file_name; |
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206 // the source debug extension for this klass, NULL if not specified. |
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207 // Specified as UTF-8 string without terminating zero byte in the classfile, |
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208 // it is stored in the instanceklass as a NULL-terminated UTF-8 string |
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209 char* _source_debug_extension; |
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210 // Generic signature, or null if none. |
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211 Symbol* _generic_signature; |
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212 // Array name derived from this class which needs unreferencing |
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213 // if this class is unloaded. |
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214 Symbol* _array_name; |
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215 |
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216 // Number of heapOopSize words used by non-static fields in this klass |
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217 // (including inherited fields but after header_size()). |
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218 int _nonstatic_field_size; |
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219 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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220 u2 _static_oop_field_count;// number of static oop fields in this klass |
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221 u2 _java_fields_count; // The number of declared Java fields |
938 | 222 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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223 |
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224 // _is_marked_dependent can be set concurrently, thus cannot be part of the |
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225 // _misc_flags. |
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226 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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227 |
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228 enum { |
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229 _misc_rewritten = 1 << 0, // methods rewritten. |
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230 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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231 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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232 _misc_is_anonymous = 1 << 3, // has embedded _host_klass field |
7596 | 233 _misc_is_contended = 1 << 4, // marked with contended annotation |
234 _misc_has_default_methods = 1 << 5 // class/superclass/implemented interfaces has default methods | |
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235 }; |
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236 u2 _misc_flags; |
0 | 237 u2 _minor_version; // minor version number of class file |
238 u2 _major_version; // major version number of class file | |
239 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
240 int _vtable_len; // length of Java vtable (in words) | |
241 int _itable_len; // length of Java itable (in words) | |
242 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
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243 MemberNameTable* _member_names; // Member names |
0 | 244 JNIid* _jni_ids; // First JNI identifier for static fields in this class |
245 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
246 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
247 nmethodBucket* _dependencies; // list of dependent nmethods | |
248 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
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249 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
0 | 250 // Array of interesting part(s) of the previous version(s) of this |
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251 // InstanceKlass. See PreviousVersionWalker below. |
0 | 252 GrowableArray<PreviousVersionNode *>* _previous_versions; |
253 // JVMTI fields can be moved to their own structure - see 6315920 | |
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254 // JVMTI: cached class file, before retransformable agent modified it in CFLH |
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255 JvmtiCachedClassFileData* _cached_class_file; |
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256 |
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257 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
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258 |
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259 // Class states are defined as ClassState (see above). |
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260 // Place the _init_state here to utilize the unused 2-byte after |
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261 // _idnum_allocated_count. |
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262 u1 _init_state; // state of class |
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263 u1 _reference_type; // reference type |
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264 |
0 | 265 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration |
6934 | 266 |
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267 NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies |
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268 |
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269 // Method array. |
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270 Array<Method*>* _methods; |
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271 // Interface (Klass*s) this class declares locally to implement. |
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272 Array<Klass*>* _local_interfaces; |
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273 // Interface (Klass*s) this class implements transitively. |
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274 Array<Klass*>* _transitive_interfaces; |
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275 // Int array containing the original order of method in the class file (for JVMTI). |
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276 Array<int>* _method_ordering; |
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277 // Instance and static variable information, starts with 6-tuples of shorts |
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278 // [access, name index, sig index, initval index, low_offset, high_offset] |
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279 // for all fields, followed by the generic signature data at the end of |
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280 // the array. Only fields with generic signature attributes have the generic |
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281 // signature data set in the array. The fields array looks like following: |
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282 // |
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283 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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284 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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285 // ... |
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286 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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287 // [generic signature index] |
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288 // [generic signature index] |
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289 // ... |
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290 Array<u2>* _fields; |
0 | 291 |
292 // embedded Java vtable follows here | |
293 // embedded Java itables follows here | |
294 // embedded static fields follows here | |
295 // embedded nonstatic oop-map blocks follows here | |
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296 // embedded implementor of this interface follows here |
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297 // The embedded implementor only exists if the current klass is an |
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298 // iterface. The possible values of the implementor fall into following |
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299 // three cases: |
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300 // NULL: no implementor. |
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301 // A Klass* that's not itself: one implementor. |
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302 // Itsef: more than one implementors. |
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303 // embedded host klass follows here |
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304 // The embedded host klass only exists in an anonymous class for |
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305 // dynamic language support (JSR 292 enabled). The host class grants |
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306 // its access privileges to this class also. The host class is either |
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307 // named, or a previously loaded anonymous class. A non-anonymous class |
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308 // or an anonymous class loaded through normal classloading does not |
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309 // have this embedded field. |
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310 // |
0 | 311 |
312 friend class SystemDictionary; | |
313 | |
314 public: | |
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315 bool has_nonstatic_fields() const { |
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316 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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317 } |
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318 void set_has_nonstatic_fields(bool b) { |
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319 if (b) { |
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320 _misc_flags |= _misc_has_nonstatic_fields; |
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321 } else { |
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322 _misc_flags &= ~_misc_has_nonstatic_fields; |
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323 } |
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324 } |
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325 |
0 | 326 // field sizes |
327 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
328 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
329 | |
330 int static_field_size() const { return _static_field_size; } | |
331 void set_static_field_size(int size) { _static_field_size = size; } | |
332 | |
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333 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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334 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 335 |
336 // Java vtable | |
337 int vtable_length() const { return _vtable_len; } | |
338 void set_vtable_length(int len) { _vtable_len = len; } | |
339 | |
340 // Java itable | |
341 int itable_length() const { return _itable_len; } | |
342 void set_itable_length(int len) { _itable_len = len; } | |
343 | |
344 // array klasses | |
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345 Klass* array_klasses() const { return _array_klasses; } |
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346 void set_array_klasses(Klass* k) { _array_klasses = k; } |
0 | 347 |
348 // methods | |
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349 Array<Method*>* methods() const { return _methods; } |
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350 void set_methods(Array<Method*>* a) { _methods = a; } |
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351 Method* method_with_idnum(int idnum); |
0 | 352 |
353 // method ordering | |
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354 Array<int>* method_ordering() const { return _method_ordering; } |
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355 void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
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356 void copy_method_ordering(intArray* m, TRAPS); |
0 | 357 |
358 // interfaces | |
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359 Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
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360 void set_local_interfaces(Array<Klass*>* a) { |
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361 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
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362 _local_interfaces = a; } |
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363 |
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364 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
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365 void set_transitive_interfaces(Array<Klass*>* a) { |
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366 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
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367 _transitive_interfaces = a; |
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368 } |
0 | 369 |
3938 | 370 private: |
371 friend class fieldDescriptor; | |
372 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
373 | |
374 public: | |
375 int field_offset (int index) const { return field(index)->offset(); } | |
376 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
377 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
378 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
379 | |
380 // Number of Java declared fields | |
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381 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 382 |
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383 Array<u2>* fields() const { return _fields; } |
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384 void set_fields(Array<u2>* f, u2 java_fields_count) { |
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385 guarantee(_fields == NULL || f == NULL, "Just checking"); |
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386 _fields = f; |
3938 | 387 _java_fields_count = java_fields_count; |
0 | 388 } |
389 | |
390 // inner classes | |
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391 Array<u2>* inner_classes() const { return _inner_classes; } |
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392 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
0 | 393 |
394 enum InnerClassAttributeOffset { | |
395 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
396 inner_class_inner_class_info_offset = 0, | |
397 inner_class_outer_class_info_offset = 1, | |
398 inner_class_inner_name_offset = 2, | |
399 inner_class_access_flags_offset = 3, | |
400 inner_class_next_offset = 4 | |
401 }; | |
402 | |
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403 enum EnclosingMethodAttributeOffset { |
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404 enclosing_method_class_index_offset = 0, |
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405 enclosing_method_method_index_offset = 1, |
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406 enclosing_method_attribute_size = 2 |
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407 }; |
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408 |
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409 // method override check |
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410 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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411 |
0 | 412 // package |
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413 bool is_same_class_package(Klass* class2); |
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414 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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415 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 416 |
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417 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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418 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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419 instanceKlassHandle self(THREAD, this); |
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420 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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421 } |
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422 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, |
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423 bool* inner_is_member, TRAPS); |
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424 |
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425 // tell if two classes have the same enclosing class (at package level) |
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426 bool is_same_package_member(Klass* class2, TRAPS) { |
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427 instanceKlassHandle self(THREAD, this); |
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428 return is_same_package_member_impl(self, class2, THREAD); |
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429 } |
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430 static bool is_same_package_member_impl(instanceKlassHandle self, |
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431 Klass* class2, TRAPS); |
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432 |
0 | 433 // initialization state |
434 bool is_loaded() const { return _init_state >= loaded; } | |
435 bool is_linked() const { return _init_state >= linked; } | |
436 bool is_initialized() const { return _init_state == fully_initialized; } | |
437 bool is_not_initialized() const { return _init_state < being_initialized; } | |
438 bool is_being_initialized() const { return _init_state == being_initialized; } | |
439 bool is_in_error_state() const { return _init_state == initialization_error; } | |
440 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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441 ClassState init_state() { return (ClassState)_init_state; } |
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442 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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443 |
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444 // defineClass specified verification |
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445 bool should_verify_class() const { |
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446 return (_misc_flags & _misc_should_verify_class) != 0; |
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447 } |
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448 void set_should_verify_class(bool value) { |
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449 if (value) { |
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450 _misc_flags |= _misc_should_verify_class; |
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451 } else { |
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452 _misc_flags &= ~_misc_should_verify_class; |
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453 } |
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454 } |
0 | 455 |
456 // marking | |
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457 bool is_marked_dependent() const { return _is_marked_dependent; } |
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458 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 459 |
460 // initialization (virtuals from Klass) | |
461 bool should_be_initialized() const; // means that initialize should be called | |
462 void initialize(TRAPS); | |
463 void link_class(TRAPS); | |
464 bool link_class_or_fail(TRAPS); // returns false on failure | |
465 void unlink_class(); | |
466 void rewrite_class(TRAPS); | |
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467 void link_methods(TRAPS); |
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468 Method* class_initializer(); |
0 | 469 |
470 // set the class to initialized if no static initializer is present | |
471 void eager_initialize(Thread *thread); | |
472 | |
473 // reference type | |
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474 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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475 void set_reference_type(ReferenceType t) { |
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476 assert(t == (u1)t, "overflow"); |
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477 _reference_type = (u1)t; |
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478 } |
0 | 479 |
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480 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
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481 |
0 | 482 // find local field, returns true if found |
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483 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 484 // find field in direct superinterfaces, returns the interface in which the field is defined |
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485 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 486 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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487 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 488 // 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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489 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 490 |
491 // find a non-static or static field given its offset within the class. | |
492 bool contains_field_offset(int offset) { | |
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493 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 494 } |
495 | |
496 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
497 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
498 | |
499 // find a local method (returns NULL if not found) | |
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500 Method* find_method(Symbol* name, Symbol* signature) const; |
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501 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
0 | 502 |
503 // lookup operation (returns NULL if not found) | |
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504 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 505 |
506 // lookup a method in all the interfaces that this class implements | |
507 // (returns NULL if not found) | |
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508 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 509 |
6934 | 510 // Find method indices by name. If a method with the specified name is |
511 // found the index to the first method is returned, and 'end' is filled in | |
512 // with the index of first non-name-matching method. If no method is found | |
513 // -1 is returned. | |
514 int find_method_by_name(Symbol* name, int* end); | |
515 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); | |
516 | |
0 | 517 // constant pool |
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518 ConstantPool* constants() const { return _constants; } |
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519 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 520 |
521 // protection domain | |
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522 oop protection_domain() const; |
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523 |
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524 // signers |
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525 objArrayOop signers() const; |
0 | 526 |
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527 // host class |
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528 Klass* host_klass() const { |
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529 Klass** hk = (Klass**)adr_host_klass(); |
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530 if (hk == NULL) { |
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531 return NULL; |
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532 } else { |
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533 return *hk; |
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534 } |
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535 } |
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536 void set_host_klass(Klass* host) { |
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537 assert(is_anonymous(), "not anonymous"); |
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538 Klass** addr = (Klass**)adr_host_klass(); |
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539 assert(addr != NULL, "no reversed space"); |
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540 if (addr != NULL) { |
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541 *addr = host; |
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542 } |
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543 } |
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544 bool is_anonymous() const { |
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545 return (_misc_flags & _misc_is_anonymous) != 0; |
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546 } |
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547 void set_is_anonymous(bool value) { |
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548 if (value) { |
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549 _misc_flags |= _misc_is_anonymous; |
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550 } else { |
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551 _misc_flags &= ~_misc_is_anonymous; |
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552 } |
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553 } |
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554 |
7409 | 555 // Oop that keeps the metadata for this class from being unloaded |
556 // in places where the metadata is stored in other places, like nmethods | |
557 oop klass_holder() const { | |
558 return is_anonymous() ? java_mirror() : class_loader(); | |
559 } | |
560 | |
7587 | 561 bool is_contended() const { |
562 return (_misc_flags & _misc_is_contended) != 0; | |
563 } | |
564 void set_is_contended(bool value) { | |
565 if (value) { | |
566 _misc_flags |= _misc_is_contended; | |
567 } else { | |
568 _misc_flags &= ~_misc_is_contended; | |
569 } | |
570 } | |
571 | |
0 | 572 // source file name |
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573 Symbol* source_file_name() const { return _source_file_name; } |
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574 void set_source_file_name(Symbol* n); |
0 | 575 |
576 // minor and major version numbers of class file | |
577 u2 minor_version() const { return _minor_version; } | |
578 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
579 u2 major_version() const { return _major_version; } | |
580 void set_major_version(u2 major_version) { _major_version = major_version; } | |
581 | |
582 // source debug extension | |
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583 char* source_debug_extension() const { return _source_debug_extension; } |
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584 void set_source_debug_extension(char* array, int length); |
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585 |
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586 // symbol unloading support (refcount already added) |
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587 Symbol* array_name() { return _array_name; } |
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588 void set_array_name(Symbol* name) { assert(_array_name == NULL || name == NULL, "name already created"); _array_name = name; } |
0 | 589 |
590 // nonstatic oop-map blocks | |
939
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591 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 592 return oop_map_count * OopMapBlock::size_in_words(); |
593 } | |
939
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594 unsigned int nonstatic_oop_map_count() const { |
938 | 595 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
596 } | |
597 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
598 void set_nonstatic_oop_map_size(int words) { | |
599 _nonstatic_oop_map_size = words; | |
600 } | |
0 | 601 |
602 // RedefineClasses() support for previous versions: | |
603 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
604 int emcp_method_count); | |
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605 // If the _previous_versions array is non-NULL, then this klass |
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606 // has been redefined at least once even if we aren't currently |
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607 // tracking a previous version. |
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608 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 609 bool has_previous_version() const; |
610 void init_previous_versions() { | |
611 _previous_versions = NULL; | |
612 } | |
613 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
614 return _previous_versions; | |
615 } | |
616 | |
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617 static void purge_previous_versions(InstanceKlass* ik); |
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618 |
0 | 619 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation |
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620 void set_cached_class_file(JvmtiCachedClassFileData *data) { |
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621 _cached_class_file = data; |
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622 } |
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623 JvmtiCachedClassFileData * get_cached_class_file() { return _cached_class_file; } |
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624 jint get_cached_class_file_len(); |
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625 unsigned char * get_cached_class_file_bytes(); |
0 | 626 |
627 // JVMTI: Support for caching of field indices, types, and offsets | |
628 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
629 _jvmti_cached_class_field_map = descriptor; | |
630 } | |
631 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
632 return _jvmti_cached_class_field_map; | |
633 } | |
634 | |
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635 bool has_default_methods() const { |
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636 return (_misc_flags & _misc_has_default_methods) != 0; |
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637 } |
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638 void set_has_default_methods(bool b) { |
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639 if (b) { |
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640 _misc_flags |= _misc_has_default_methods; |
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641 } else { |
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642 _misc_flags &= ~_misc_has_default_methods; |
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643 } |
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644 } |
6934 | 645 |
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646 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
0 | 647 inline u2 next_method_idnum(); |
648 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
649 | |
650 // generics support | |
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651 Symbol* generic_signature() const { return _generic_signature; } |
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652 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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653 |
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654 u2 enclosing_method_data(int offset); |
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655 u2 enclosing_method_class_index() { |
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656 return enclosing_method_data(enclosing_method_class_index_offset); |
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657 } |
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658 u2 enclosing_method_method_index() { |
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659 return enclosing_method_data(enclosing_method_method_index_offset); |
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660 } |
0 | 661 void set_enclosing_method_indices(u2 class_index, |
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662 u2 method_index); |
0 | 663 |
664 // jmethodID support | |
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665 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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666 methodHandle method_h); |
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667 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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668 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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669 jmethodID* to_dealloc_id_p, |
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670 jmethodID** to_dealloc_jmeths_p); |
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671 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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672 size_t *length_p, jmethodID* id_p); |
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673 jmethodID jmethod_id_or_null(Method* method); |
0 | 674 |
675 // cached itable index support | |
676 void set_cached_itable_index(size_t idnum, int index); | |
677 int cached_itable_index(size_t idnum); | |
678 | |
679 // annotations support | |
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680 Annotations* annotations() const { return _annotations; } |
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681 void set_annotations(Annotations* anno) { _annotations = anno; } |
8031 | 682 |
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683 AnnotationArray* class_annotations() const { |
8031 | 684 return (_annotations != NULL) ? _annotations->class_annotations() : NULL; |
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685 } |
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686 Array<AnnotationArray*>* fields_annotations() const { |
8031 | 687 return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; |
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688 } |
8031 | 689 AnnotationArray* class_type_annotations() const { |
690 return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; | |
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691 } |
8031 | 692 Array<AnnotationArray*>* fields_type_annotations() const { |
693 return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; | |
694 } | |
0 | 695 // allocation |
696 instanceOop allocate_instance(TRAPS); | |
697 | |
698 // additional member function to return a handle | |
699 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
700 | |
701 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
702 // Helper function | |
703 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
704 | |
705 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
706 // if not, throw either an Error or an Exception. | |
707 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
708 | |
709 // initialization | |
710 void call_class_initializer(TRAPS); | |
711 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
712 | |
713 // OopMapCache support | |
714 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
715 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
716 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
717 | |
718 // JNI identifier support (for static fields - for jni performance) | |
719 JNIid* jni_ids() { return _jni_ids; } | |
720 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
721 JNIid* jni_id_for(int offset); | |
722 | |
723 // maintenance of deoptimization dependencies | |
724 int mark_dependent_nmethods(DepChange& changes); | |
725 void add_dependent_nmethod(nmethod* nm); | |
726 void remove_dependent_nmethod(nmethod* nm); | |
727 | |
728 // On-stack replacement support | |
729 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
730 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
731 void add_osr_nmethod(nmethod* n); | |
732 void remove_osr_nmethod(nmethod* n); | |
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733 nmethod* lookup_osr_nmethod(const Method* m, int bci, int level, bool match_level) const; |
0 | 734 |
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735 // Breakpoint support (see methods on Method* for details) |
0 | 736 BreakpointInfo* breakpoints() const { return _breakpoints; }; |
737 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
738 | |
739 // support for stub routines | |
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740 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
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741 TRACE_DEFINE_OFFSET; |
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742 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
0 | 743 |
744 // subclass/subinterface checks | |
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745 bool implements_interface(Klass* k) const; |
0 | 746 |
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747 // Access to the implementor of an interface. |
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748 Klass* implementor() const |
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749 { |
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750 Klass** k = adr_implementor(); |
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751 if (k == NULL) { |
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752 return NULL; |
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753 } else { |
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754 return *k; |
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755 } |
0 | 756 } |
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757 |
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758 void set_implementor(Klass* k) { |
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759 assert(is_interface(), "not interface"); |
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760 Klass** addr = adr_implementor(); |
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761 assert(addr != NULL, "null addr"); |
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762 if (addr != NULL) { |
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763 *addr = k; |
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764 } |
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765 } |
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766 |
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767 int nof_implementors() const { |
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768 Klass* k = implementor(); |
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769 if (k == NULL) { |
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770 return 0; |
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771 } else if (k != this) { |
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772 return 1; |
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773 } else { |
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774 return 2; |
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775 } |
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776 } |
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777 |
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778 void add_implementor(Klass* k); // k is a new class that implements this interface |
0 | 779 void init_implementor(); // initialize |
780 | |
781 // link this class into the implementors list of every interface it implements | |
782 void process_interfaces(Thread *thread); | |
783 | |
784 // virtual operations from Klass | |
785 bool is_leaf_class() const { return _subklass == NULL; } | |
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786 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
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787 bool compute_is_subtype_of(Klass* k); |
0 | 788 bool can_be_primary_super_slow() const; |
789 int oop_size(oop obj) const { return size_helper(); } | |
790 bool oop_is_instance_slow() const { return true; } | |
791 | |
792 // Iterators | |
793 void do_local_static_fields(FieldClosure* cl); | |
794 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
795 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
796 | |
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797 void methods_do(void f(Method* method)); |
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798 void array_klasses_do(void f(Klass* k)); |
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799 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
0 | 800 bool super_types_do(SuperTypeClosure* blk); |
801 | |
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802 // Casting from Klass* |
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803 static InstanceKlass* cast(Klass* k) { |
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804 assert(k->is_klass(), "must be"); |
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805 assert(k->oop_is_instance(), "cast to InstanceKlass"); |
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806 return (InstanceKlass*) k; |
0 | 807 } |
808 | |
6934 | 809 InstanceKlass* java_super() const { |
810 return (super() == NULL) ? NULL : cast(super()); | |
811 } | |
812 | |
0 | 813 // Sizing (in words) |
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814 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } |
8031 | 815 |
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816 static int size(int vtable_length, int itable_length, |
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817 int nonstatic_oop_map_size, |
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818 bool is_interface, bool is_anonymous) { |
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819 return align_object_size(header_size() + |
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820 align_object_offset(vtable_length) + |
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821 align_object_offset(itable_length) + |
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822 ((is_interface || is_anonymous) ? |
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823 align_object_offset(nonstatic_oop_map_size) : |
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824 nonstatic_oop_map_size) + |
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825 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + |
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826 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); |
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827 } |
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828 int size() const { return size(vtable_length(), |
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829 itable_length(), |
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830 nonstatic_oop_map_size(), |
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831 is_interface(), |
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832 is_anonymous()); |
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833 } |
7956 | 834 #if INCLUDE_SERVICES |
835 virtual void collect_statistics(KlassSizeStats *sz) const; | |
836 #endif | |
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837 |
0 | 838 static int vtable_start_offset() { return header_size(); } |
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839 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } |
0 | 840 |
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841 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } |
0 | 842 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } |
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843 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
0 | 844 |
845 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
846 | |
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847 address static_field_addr(int offset); |
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848 |
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849 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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850 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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851 } |
0 | 852 |
8031 | 853 Klass** end_of_nonstatic_oop_maps() const { |
854 return (Klass**)(start_of_nonstatic_oop_maps() + | |
855 nonstatic_oop_map_count()); | |
856 } | |
857 | |
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858 Klass** adr_implementor() const { |
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859 if (is_interface()) { |
8031 | 860 return (Klass**)end_of_nonstatic_oop_maps(); |
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861 } else { |
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862 return NULL; |
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863 } |
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864 }; |
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865 |
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866 Klass** adr_host_klass() const { |
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867 if (is_anonymous()) { |
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868 Klass** adr_impl = adr_implementor(); |
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869 if (adr_impl != NULL) { |
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870 return adr_impl + 1; |
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871 } else { |
8031 | 872 return end_of_nonstatic_oop_maps(); |
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873 } |
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874 } else { |
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875 return NULL; |
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876 } |
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877 } |
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878 |
0 | 879 // Use this to return the size of an instance in heap words: |
880 int size_helper() const { | |
881 return layout_helper_to_size_helper(layout_helper()); | |
882 } | |
883 | |
884 // This bit is initialized in classFileParser.cpp. | |
885 // It is false under any of the following conditions: | |
886 // - the class is abstract (including any interface) | |
887 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
888 // - the class size is larger than FastAllocateSizeLimit | |
889 // - the class is java/lang/Class, which cannot be allocated directly | |
890 bool can_be_fastpath_allocated() const { | |
891 return !layout_helper_needs_slow_path(layout_helper()); | |
892 } | |
893 | |
894 // Java vtable/itable | |
895 klassVtable* vtable() const; // return new klassVtable wrapper | |
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896 inline Method* method_at_vtable(int index); |
0 | 897 klassItable* itable() const; // return new klassItable wrapper |
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898 Method* method_at_itable(Klass* holder, int index, TRAPS); |
0 | 899 |
900 // Garbage collection | |
901 void oop_follow_contents(oop obj); | |
902 int oop_adjust_pointers(oop obj); | |
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903 |
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904 void clean_implementors_list(BoolObjectClosure* is_alive); |
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905 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 906 |
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907 // Explicit metaspace deallocation of fields |
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908 // For RedefineClasses and class file parsing errors, we need to deallocate |
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909 // instanceKlasses and the metadata they point to. |
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910 void deallocate_contents(ClassLoaderData* loader_data); |
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911 static void deallocate_methods(ClassLoaderData* loader_data, |
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912 Array<Method*>* methods); |
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913 void static deallocate_interfaces(ClassLoaderData* loader_data, |
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914 Klass* super_klass, |
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915 Array<Klass*>* local_interfaces, |
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916 Array<Klass*>* transitive_interfaces); |
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917 |
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918 // The constant pool is on stack if any of the methods are executing or |
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919 // referenced by handles. |
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920 bool on_stack() const { return _constants->on_stack(); } |
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921 |
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922 // callbacks for actions during class unloading |
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923 static void notify_unload_class(InstanceKlass* ik); |
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924 static void release_C_heap_structures(InstanceKlass* ik); |
0 | 925 |
926 // Parallel Scavenge and Parallel Old | |
927 PARALLEL_GC_DECLS | |
928 | |
929 // Naming | |
1039
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930 const char* signature_name() const; |
0 | 931 |
932 // Iterators | |
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933 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
0 | 934 return oop_oop_iterate_v(obj, blk); |
935 } | |
936 | |
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937 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 938 return oop_oop_iterate_v_m(obj, blk, mr); |
939 } | |
940 | |
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941 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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942 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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943 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 944 MemRegion mr); |
945 | |
946 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
342
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947 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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948 |
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949 #if INCLUDE_ALL_GCS |
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950 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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951 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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952 |
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953 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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954 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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955 #endif // INCLUDE_ALL_GCS |
0 | 956 |
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957 u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
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958 |
0 | 959 private: |
960 // initialization state | |
961 #ifdef ASSERT | |
962 void set_init_state(ClassState state); | |
963 #else | |
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964 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 965 #endif |
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966 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 967 void set_init_thread(Thread *thread) { _init_thread = thread; } |
968 | |
977
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969 // The RedefineClasses() API can cause new method idnums to be needed |
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970 // which will cause the caches to grow. Safety requires different |
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971 // cache management logic if the caches can grow instead of just |
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972 // going from NULL to non-NULL. |
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973 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 974 jmethodID* methods_jmethod_ids_acquire() const |
975 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
976 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
977 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
978 | |
979 int* methods_cached_itable_indices_acquire() const | |
980 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
981 void release_set_methods_cached_itable_indices(int* indices) | |
982 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
983 | |
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984 // Lock during initialization |
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985 public: |
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986 // Lock for (1) initialization; (2) access to the ConstantPool of this class. |
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987 // Must be one per class and it has to be a VM internal object so java code |
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988 // cannot lock it (like the mirror). |
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989 // It has to be an object not a Mutex because it's held through java calls. |
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990 volatile oop init_lock() const; |
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991 private: |
0 | 992 |
993 // Static methods that are used to implement member methods where an exposed this pointer | |
994 // is needed due to possible GCs | |
995 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
996 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
997 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
998 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
999 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
1000 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
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1001 static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); |
0 | 1002 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); |
1003 /* jni_id_for_impl for jfieldID only */ | |
1004 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
1005 | |
1006 // Returns the array class for the n'th dimension | |
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1007 Klass* array_klass_impl(bool or_null, int n, TRAPS); |
0 | 1008 |
1009 // Returns the array class with this class as element type | |
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1010 Klass* array_klass_impl(bool or_null, TRAPS); |
0 | 1011 |
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1012 // Free CHeap allocated fields. |
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1013 void release_C_heap_structures(); |
0 | 1014 public: |
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1015 // CDS support - remove and restore oops from metadata. Oops are not shared. |
0 | 1016 virtual void remove_unshareable_info(); |
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1017 virtual void restore_unshareable_info(TRAPS); |
0 | 1018 |
1019 // jvm support | |
1020 jint compute_modifier_flags(TRAPS) const; | |
1021 | |
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1022 // JSR-292 support |
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1023 MemberNameTable* member_names() { return _member_names; } |
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1024 void set_member_names(MemberNameTable* member_names) { _member_names = member_names; } |
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1025 void add_member_name(int index, Handle member_name); |
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1026 oop get_member_name(int index); |
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1027 |
0 | 1028 public: |
1029 // JVMTI support | |
1030 jint jvmti_class_status() const; | |
1031 | |
1032 public: | |
1033 // Printing | |
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1034 #ifndef PRODUCT |
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1035 void print_on(outputStream* st) const; |
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1036 #endif |
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1037 void print_value_on(outputStream* st) const; |
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1038 |
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1039 void oop_print_value_on(oop obj, outputStream* st); |
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1040 |
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1041 #ifndef PRODUCT |
0 | 1042 void oop_print_on (oop obj, outputStream* st); |
1043 | |
1044 void print_dependent_nmethods(bool verbose = false); | |
1045 bool is_dependent_nmethod(nmethod* nm); | |
1046 #endif | |
1047 | |
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1048 const char* internal_name() const; |
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1049 |
0 | 1050 // Verification |
11034 | 1051 void verify_on(outputStream* st, bool check_dictionary); |
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1052 |
0 | 1053 void oop_verify_on(oop obj, outputStream* st); |
1054 }; | |
1055 | |
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1056 inline Method* InstanceKlass::method_at_vtable(int index) { |
0 | 1057 #ifndef PRODUCT |
1058 assert(index >= 0, "valid vtable index"); | |
1059 if (DebugVtables) { | |
1060 verify_vtable_index(index); | |
1061 } | |
1062 #endif | |
1063 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
1064 return ve[index].method(); | |
1065 } | |
1066 | |
1067 // for adding methods | |
1068 // UNSET_IDNUM return means no more ids available | |
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1069 inline u2 InstanceKlass::next_method_idnum() { |
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1070 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
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1071 return ConstMethod::UNSET_IDNUM; // no more ids available |
0 | 1072 } else { |
1073 return _idnum_allocated_count++; | |
1074 } | |
1075 } | |
1076 | |
1077 | |
1078 /* JNIid class for jfieldIDs only */ | |
6197 | 1079 class JNIid: public CHeapObj<mtClass> { |
0 | 1080 friend class VMStructs; |
1081 private: | |
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1082 Klass* _holder; |
0 | 1083 JNIid* _next; |
1084 int _offset; | |
1085 #ifdef ASSERT | |
1086 bool _is_static_field_id; | |
1087 #endif | |
1088 | |
1089 public: | |
1090 // Accessors | |
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1091 Klass* holder() const { return _holder; } |
0 | 1092 int offset() const { return _offset; } |
1093 JNIid* next() { return _next; } | |
1094 // Constructor | |
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1095 JNIid(Klass* holder, int offset, JNIid* next); |
0 | 1096 // Identifier lookup |
1097 JNIid* find(int offset); | |
1098 | |
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1099 bool find_local_field(fieldDescriptor* fd) { |
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1100 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1101 } |
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1102 |
0 | 1103 static void deallocate(JNIid* id); |
1104 // Debugging | |
1105 #ifdef ASSERT | |
1106 bool is_static_field_id() const { return _is_static_field_id; } | |
1107 void set_is_static_field_id() { _is_static_field_id = true; } | |
1108 #endif | |
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1109 void verify(Klass* holder); |
0 | 1110 }; |
1111 | |
1112 | |
1113 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1114 // consider compressing this data structure. | |
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1115 // It is currently a simple linked list defined in method.hpp. |
0 | 1116 |
1117 class BreakpointInfo; | |
1118 | |
1119 | |
1120 // A collection point for interesting information about the previous | |
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1121 // version(s) of an InstanceKlass. This class uses weak references to |
0 | 1122 // the information so that the information may be collected as needed |
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1123 // by the system. If the information is shared, then a regular |
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1124 // reference must be used because a weak reference would be seen as |
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1125 // collectible. A GrowableArray of PreviousVersionNodes is attached |
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1126 // to the InstanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1127 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1128 private: |
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1129 // A shared ConstantPool is never collected so we'll always have |
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1130 // a reference to it so we can update items in the cache. We'll |
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1131 // have a weak reference to a non-shared ConstantPool until all |
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1132 // of the methods (EMCP or obsolete) have been collected; the |
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1133 // non-shared ConstantPool becomes collectible at that point. |
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1134 ConstantPool* _prev_constant_pool; // regular or weak reference |
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1135 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1136 |
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1137 // If the previous version of the InstanceKlass doesn't have any |
0 | 1138 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the |
1139 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1140 // have a length of zero. | |
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1141 GrowableArray<Method*>* _prev_EMCP_methods; |
0 | 1142 |
1143 public: | |
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1144 PreviousVersionNode(ConstantPool* prev_constant_pool, bool prev_cp_is_weak, |
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1145 GrowableArray<Method*>* prev_EMCP_methods); |
0 | 1146 ~PreviousVersionNode(); |
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1147 ConstantPool* prev_constant_pool() const { |
0 | 1148 return _prev_constant_pool; |
1149 } | |
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1150 GrowableArray<Method*>* prev_EMCP_methods() const { |
0 | 1151 return _prev_EMCP_methods; |
1152 } | |
1153 }; | |
1154 | |
1155 | |
1156 // A Handle-ized version of PreviousVersionNode. | |
1157 class PreviousVersionInfo : public ResourceObj { | |
1158 private: | |
1159 constantPoolHandle _prev_constant_pool_handle; | |
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1160 // If the previous version of the InstanceKlass doesn't have any |
0 | 1161 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the |
1162 // methods cannot be collected while we hold a handle, | |
1163 // _prev_EMCP_methods should never have a length of zero. | |
1164 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1165 | |
1166 public: | |
1167 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1168 ~PreviousVersionInfo(); | |
1169 constantPoolHandle prev_constant_pool_handle() const { | |
1170 return _prev_constant_pool_handle; | |
1171 } | |
1172 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1173 return _prev_EMCP_method_handles; | |
1174 } | |
1175 }; | |
1176 | |
1177 | |
1178 // Helper object for walking previous versions. This helper cleans up | |
1179 // the Handles that it allocates when the helper object is destroyed. | |
1180 // The PreviousVersionInfo object returned by next_previous_version() | |
1181 // is only valid until a subsequent call to next_previous_version() or | |
1182 // the helper object is destroyed. | |
1183 class PreviousVersionWalker : public StackObj { | |
1184 private: | |
1185 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1186 int _current_index; | |
1187 // Fields for cleaning up when we are done walking the previous versions: | |
1188 // A HandleMark for the PreviousVersionInfo handles: | |
1189 HandleMark _hm; | |
1190 | |
1191 // It would be nice to have a ResourceMark field in this helper also, | |
1192 // but the ResourceMark code says to be careful to delete handles held | |
1193 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1194 // can't guarantee the order in which the fields are destroyed, we | |
1195 // have to let the creator of the PreviousVersionWalker object do | |
1196 // the right thing. Also, adding a ResourceMark here causes an | |
1197 // include loop. | |
1198 | |
1199 // A pointer to the current info object so we can handle the deletes. | |
1200 PreviousVersionInfo * _current_p; | |
1201 | |
1202 public: | |
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1203 PreviousVersionWalker(InstanceKlass *ik); |
0 | 1204 ~PreviousVersionWalker(); |
1205 | |
1206 // Return the interesting information for the next previous version | |
1207 // of the klass. Returns NULL if there are no more previous versions. | |
1208 PreviousVersionInfo* next_previous_version(); | |
1209 }; | |
1972 | 1210 |
3939 | 1211 |
1212 // | |
1213 // nmethodBucket is used to record dependent nmethods for | |
1214 // deoptimization. nmethod dependencies are actually <klass, method> | |
1215 // pairs but we really only care about the klass part for purposes of | |
1216 // finding nmethods which might need to be deoptimized. Instead of | |
1217 // recording the method, a count of how many times a particular nmethod | |
1218 // was recorded is kept. This ensures that any recording errors are | |
1219 // noticed since an nmethod should be removed as many times are it's | |
1220 // added. | |
1221 // | |
6197 | 1222 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1223 friend class VMStructs; |
1224 private: | |
1225 nmethod* _nmethod; | |
1226 int _count; | |
1227 nmethodBucket* _next; | |
1228 | |
1229 public: | |
1230 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1231 _nmethod = nmethod; | |
1232 _next = next; | |
1233 _count = 1; | |
1234 } | |
1235 int count() { return _count; } | |
1236 int increment() { _count += 1; return _count; } | |
1237 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1238 nmethodBucket* next() { return _next; } | |
1239 void set_next(nmethodBucket* b) { _next = b; } | |
1240 nmethod* get_nmethod() { return _nmethod; } | |
1241 }; | |
1242 | |
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1243 // An iterator that's used to access the inner classes indices in the |
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1244 // InstanceKlass::_inner_classes array. |
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1245 class InnerClassesIterator : public StackObj { |
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1246 private: |
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1247 Array<jushort>* _inner_classes; |
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1248 int _length; |
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1249 int _idx; |
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1250 public: |
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1251 |
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1252 InnerClassesIterator(instanceKlassHandle k) { |
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1253 _inner_classes = k->inner_classes(); |
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1254 if (k->inner_classes() != NULL) { |
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1255 _length = _inner_classes->length(); |
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1256 // The inner class array's length should be the multiple of |
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1257 // inner_class_next_offset if it only contains the InnerClasses |
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1258 // attribute data, or it should be |
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1259 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1260 // if it also contains the EnclosingMethod data. |
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1261 assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
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1262 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
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1263 "just checking"); |
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1264 // Remove the enclosing_method portion if exists. |
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1265 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
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1266 _length -= InstanceKlass::enclosing_method_attribute_size; |
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1267 } |
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1268 } else { |
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1269 _length = 0; |
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1270 } |
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1271 _idx = 0; |
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1272 } |
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1273 |
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1274 int length() const { |
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1275 return _length; |
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1276 } |
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1277 |
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1278 void next() { |
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1279 _idx += InstanceKlass::inner_class_next_offset; |
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1280 } |
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1281 |
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1282 bool done() const { |
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1283 return (_idx >= _length); |
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1284 } |
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1285 |
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1286 u2 inner_class_info_index() const { |
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1287 return _inner_classes->at( |
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1288 _idx + InstanceKlass::inner_class_inner_class_info_offset); |
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1289 } |
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1290 |
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1291 void set_inner_class_info_index(u2 index) { |
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1292 _inner_classes->at_put( |
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1293 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
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1294 } |
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1295 |
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1296 u2 outer_class_info_index() const { |
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1297 return _inner_classes->at( |
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1298 _idx + InstanceKlass::inner_class_outer_class_info_offset); |
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1299 } |
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1300 |
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1301 void set_outer_class_info_index(u2 index) { |
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1302 _inner_classes->at_put( |
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1303 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
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1304 } |
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1305 |
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1306 u2 inner_name_index() const { |
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1307 return _inner_classes->at( |
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1308 _idx + InstanceKlass::inner_class_inner_name_offset); |
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1309 } |
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1310 |
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1311 void set_inner_name_index(u2 index) { |
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1312 _inner_classes->at_put( |
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1313 _idx + InstanceKlass::inner_class_inner_name_offset, index); |
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1314 } |
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1315 |
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1316 u2 inner_access_flags() const { |
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1317 return _inner_classes->at( |
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1318 _idx + InstanceKlass::inner_class_access_flags_offset); |
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1319 } |
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1320 }; |
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1321 |
1972 | 1322 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |