Mercurial > hg > truffle
annotate src/share/vm/oops/instanceKlass.hpp @ 14649:f6301b007a16
6498581: ThreadInterruptTest3 produces wrong output on Windows
Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
author | minqi |
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date | Wed, 26 Feb 2014 15:20:41 -0800 |
parents | 48314d596a04 |
children | fdad2932c73f |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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 nmethodBucket* _dependencies; // list of dependent nmethods | |
249 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
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250 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
0 | 251 // Array of interesting part(s) of the previous version(s) of this |
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252 // InstanceKlass. See PreviousVersionWalker below. |
0 | 253 GrowableArray<PreviousVersionNode *>* _previous_versions; |
254 // JVMTI fields can be moved to their own structure - see 6315920 | |
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255 // JVMTI: cached class file, before retransformable agent modified it in CFLH |
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256 JvmtiCachedClassFileData* _cached_class_file; |
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257 |
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258 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
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259 |
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260 // Class states are defined as ClassState (see above). |
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261 // Place the _init_state here to utilize the unused 2-byte after |
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262 // _idnum_allocated_count. |
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263 u1 _init_state; // state of class |
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264 u1 _reference_type; // reference type |
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265 |
0 | 266 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration |
6934 | 267 |
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268 NOT_PRODUCT(int _verify_count;) // to avoid redundant verifies |
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269 |
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270 // Method array. |
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271 Array<Method*>* _methods; |
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272 // Default Method Array, concrete methods inherited from interfaces |
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273 Array<Method*>* _default_methods; |
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274 // Interface (Klass*s) this class declares locally to implement. |
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275 Array<Klass*>* _local_interfaces; |
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276 // Interface (Klass*s) this class implements transitively. |
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277 Array<Klass*>* _transitive_interfaces; |
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278 // Int array containing the original order of method in the class file (for JVMTI). |
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279 Array<int>* _method_ordering; |
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280 // Int array containing the vtable_indices for default_methods |
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281 // offset matches _default_methods offset |
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282 Array<int>* _default_vtable_indices; |
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283 |
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284 // Instance and static variable information, starts with 6-tuples of shorts |
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285 // [access, name index, sig index, initval index, low_offset, high_offset] |
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286 // for all fields, followed by the generic signature data at the end of |
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287 // the array. Only fields with generic signature attributes have the generic |
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288 // signature data set in the array. The fields array looks like following: |
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289 // |
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290 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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291 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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292 // ... |
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293 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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294 // [generic signature index] |
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295 // [generic signature index] |
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296 // ... |
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297 Array<u2>* _fields; |
0 | 298 |
299 // embedded Java vtable follows here | |
300 // embedded Java itables follows here | |
301 // embedded static fields follows here | |
302 // embedded nonstatic oop-map blocks follows here | |
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303 // embedded implementor of this interface follows here |
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304 // The embedded implementor only exists if the current klass is an |
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305 // iterface. The possible values of the implementor fall into following |
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306 // three cases: |
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307 // NULL: no implementor. |
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308 // A Klass* that's not itself: one implementor. |
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309 // Itsef: more than one implementors. |
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310 // embedded host klass follows here |
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311 // The embedded host klass only exists in an anonymous class for |
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312 // dynamic language support (JSR 292 enabled). The host class grants |
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313 // its access privileges to this class also. The host class is either |
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314 // named, or a previously loaded anonymous class. A non-anonymous class |
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315 // or an anonymous class loaded through normal classloading does not |
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316 // have this embedded field. |
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317 // |
0 | 318 |
319 friend class SystemDictionary; | |
320 | |
321 public: | |
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322 bool has_nonstatic_fields() const { |
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323 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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324 } |
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325 void set_has_nonstatic_fields(bool b) { |
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326 if (b) { |
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327 _misc_flags |= _misc_has_nonstatic_fields; |
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328 } else { |
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329 _misc_flags &= ~_misc_has_nonstatic_fields; |
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330 } |
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331 } |
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332 |
0 | 333 // field sizes |
334 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
335 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
336 | |
337 int static_field_size() const { return _static_field_size; } | |
338 void set_static_field_size(int size) { _static_field_size = size; } | |
339 | |
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340 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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341 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 342 |
343 // Java vtable | |
344 int vtable_length() const { return _vtable_len; } | |
345 void set_vtable_length(int len) { _vtable_len = len; } | |
346 | |
347 // Java itable | |
348 int itable_length() const { return _itable_len; } | |
349 void set_itable_length(int len) { _itable_len = len; } | |
350 | |
351 // array klasses | |
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352 Klass* array_klasses() const { return _array_klasses; } |
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353 void set_array_klasses(Klass* k) { _array_klasses = k; } |
0 | 354 |
355 // methods | |
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356 Array<Method*>* methods() const { return _methods; } |
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357 void set_methods(Array<Method*>* a) { _methods = a; } |
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358 Method* method_with_idnum(int idnum); |
0 | 359 |
360 // method ordering | |
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361 Array<int>* method_ordering() const { return _method_ordering; } |
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362 void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
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363 void copy_method_ordering(intArray* m, TRAPS); |
0 | 364 |
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365 // default_methods |
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366 Array<Method*>* default_methods() const { return _default_methods; } |
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367 void set_default_methods(Array<Method*>* a) { _default_methods = a; } |
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368 |
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369 // default method vtable_indices |
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370 Array<int>* default_vtable_indices() const { return _default_vtable_indices; } |
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371 void set_default_vtable_indices(Array<int>* v) { _default_vtable_indices = v; } |
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372 Array<int>* create_new_default_vtable_indices(int len, TRAPS); |
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373 |
0 | 374 // interfaces |
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375 Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
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376 void set_local_interfaces(Array<Klass*>* a) { |
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377 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
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378 _local_interfaces = a; } |
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379 |
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380 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
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381 void set_transitive_interfaces(Array<Klass*>* a) { |
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382 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
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383 _transitive_interfaces = a; |
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384 } |
0 | 385 |
3938 | 386 private: |
387 friend class fieldDescriptor; | |
388 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
389 | |
390 public: | |
391 int field_offset (int index) const { return field(index)->offset(); } | |
392 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
393 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
394 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
395 | |
396 // Number of Java declared fields | |
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397 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 398 |
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399 Array<u2>* fields() const { return _fields; } |
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400 void set_fields(Array<u2>* f, u2 java_fields_count) { |
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401 guarantee(_fields == NULL || f == NULL, "Just checking"); |
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402 _fields = f; |
3938 | 403 _java_fields_count = java_fields_count; |
0 | 404 } |
405 | |
406 // inner classes | |
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407 Array<u2>* inner_classes() const { return _inner_classes; } |
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408 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
0 | 409 |
410 enum InnerClassAttributeOffset { | |
411 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
412 inner_class_inner_class_info_offset = 0, | |
413 inner_class_outer_class_info_offset = 1, | |
414 inner_class_inner_name_offset = 2, | |
415 inner_class_access_flags_offset = 3, | |
416 inner_class_next_offset = 4 | |
417 }; | |
418 | |
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419 enum EnclosingMethodAttributeOffset { |
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420 enclosing_method_class_index_offset = 0, |
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421 enclosing_method_method_index_offset = 1, |
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422 enclosing_method_attribute_size = 2 |
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423 }; |
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424 |
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425 // method override check |
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426 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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427 |
0 | 428 // package |
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429 bool is_same_class_package(Klass* class2); |
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430 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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431 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 432 |
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433 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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434 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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435 instanceKlassHandle self(THREAD, this); |
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436 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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437 } |
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438 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, |
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439 bool* inner_is_member, TRAPS); |
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440 |
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441 // tell if two classes have the same enclosing class (at package level) |
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442 bool is_same_package_member(Klass* class2, TRAPS) { |
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443 instanceKlassHandle self(THREAD, this); |
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444 return is_same_package_member_impl(self, class2, THREAD); |
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445 } |
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446 static bool is_same_package_member_impl(instanceKlassHandle self, |
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447 Klass* class2, TRAPS); |
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448 |
0 | 449 // initialization state |
450 bool is_loaded() const { return _init_state >= loaded; } | |
451 bool is_linked() const { return _init_state >= linked; } | |
452 bool is_initialized() const { return _init_state == fully_initialized; } | |
453 bool is_not_initialized() const { return _init_state < being_initialized; } | |
454 bool is_being_initialized() const { return _init_state == being_initialized; } | |
455 bool is_in_error_state() const { return _init_state == initialization_error; } | |
456 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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457 ClassState init_state() { return (ClassState)_init_state; } |
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458 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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459 |
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460 // defineClass specified verification |
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461 bool should_verify_class() const { |
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462 return (_misc_flags & _misc_should_verify_class) != 0; |
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463 } |
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464 void set_should_verify_class(bool value) { |
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465 if (value) { |
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466 _misc_flags |= _misc_should_verify_class; |
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467 } else { |
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468 _misc_flags &= ~_misc_should_verify_class; |
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469 } |
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470 } |
0 | 471 |
472 // marking | |
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473 bool is_marked_dependent() const { return _is_marked_dependent; } |
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474 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 475 |
476 // initialization (virtuals from Klass) | |
477 bool should_be_initialized() const; // means that initialize should be called | |
478 void initialize(TRAPS); | |
479 void link_class(TRAPS); | |
480 bool link_class_or_fail(TRAPS); // returns false on failure | |
481 void unlink_class(); | |
482 void rewrite_class(TRAPS); | |
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483 void link_methods(TRAPS); |
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484 Method* class_initializer(); |
0 | 485 |
486 // set the class to initialized if no static initializer is present | |
487 void eager_initialize(Thread *thread); | |
488 | |
489 // reference type | |
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490 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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491 void set_reference_type(ReferenceType t) { |
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492 assert(t == (u1)t, "overflow"); |
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493 _reference_type = (u1)t; |
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494 } |
0 | 495 |
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496 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
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497 |
0 | 498 // find local field, returns true if found |
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499 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 500 // find field in direct superinterfaces, returns the interface in which the field is defined |
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501 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 502 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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503 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 504 // 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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505 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 506 |
507 // find a non-static or static field given its offset within the class. | |
508 bool contains_field_offset(int offset) { | |
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509 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 510 } |
511 | |
512 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
513 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
514 | |
515 // find a local method (returns NULL if not found) | |
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516 Method* find_method(Symbol* name, Symbol* signature) const; |
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517 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
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518 static Method* find_instance_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
0 | 519 |
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520 // find a local method index in default_methods (returns -1 if not found) |
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521 static int find_method_index(Array<Method*>* methods, Symbol* name, Symbol* signature); |
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522 |
0 | 523 // lookup operation (returns NULL if not found) |
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524 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 525 |
526 // lookup a method in all the interfaces that this class implements | |
527 // (returns NULL if not found) | |
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528 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature, bool skip_default_methods) const; |
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529 |
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530 // lookup a method in local defaults then in all interfaces |
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531 // (returns NULL if not found) |
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532 Method* lookup_method_in_ordered_interfaces(Symbol* name, Symbol* signature) const; |
0 | 533 |
6934 | 534 // Find method indices by name. If a method with the specified name is |
535 // found the index to the first method is returned, and 'end' is filled in | |
536 // with the index of first non-name-matching method. If no method is found | |
537 // -1 is returned. | |
538 int find_method_by_name(Symbol* name, int* end); | |
539 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); | |
540 | |
0 | 541 // constant pool |
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542 ConstantPool* constants() const { return _constants; } |
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543 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 544 |
545 // protection domain | |
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546 oop protection_domain() const; |
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547 |
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548 // signers |
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549 objArrayOop signers() const; |
0 | 550 |
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551 // host class |
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552 Klass* host_klass() const { |
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553 Klass** hk = (Klass**)adr_host_klass(); |
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554 if (hk == NULL) { |
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555 return NULL; |
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556 } else { |
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557 assert(*hk != NULL, "host klass should always be set if the address is not null"); |
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558 return *hk; |
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559 } |
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560 } |
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561 void set_host_klass(Klass* host) { |
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562 assert(is_anonymous(), "not anonymous"); |
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563 Klass** addr = (Klass**)adr_host_klass(); |
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564 assert(addr != NULL, "no reversed space"); |
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565 if (addr != NULL) { |
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566 *addr = host; |
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567 } |
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568 } |
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569 bool is_anonymous() const { |
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570 return (_misc_flags & _misc_is_anonymous) != 0; |
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571 } |
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572 void set_is_anonymous(bool value) { |
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573 if (value) { |
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574 _misc_flags |= _misc_is_anonymous; |
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575 } else { |
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576 _misc_flags &= ~_misc_is_anonymous; |
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577 } |
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578 } |
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579 |
7409 | 580 // Oop that keeps the metadata for this class from being unloaded |
581 // in places where the metadata is stored in other places, like nmethods | |
582 oop klass_holder() const { | |
583 return is_anonymous() ? java_mirror() : class_loader(); | |
584 } | |
585 | |
7587 | 586 bool is_contended() const { |
587 return (_misc_flags & _misc_is_contended) != 0; | |
588 } | |
589 void set_is_contended(bool value) { | |
590 if (value) { | |
591 _misc_flags |= _misc_is_contended; | |
592 } else { | |
593 _misc_flags &= ~_misc_is_contended; | |
594 } | |
595 } | |
596 | |
0 | 597 // source file name |
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598 Symbol* source_file_name() const { |
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599 return (_source_file_name_index == 0) ? |
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600 (Symbol*)NULL : _constants->symbol_at(_source_file_name_index); |
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601 } |
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602 u2 source_file_name_index() const { |
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603 return _source_file_name_index; |
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604 } |
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605 void set_source_file_name_index(u2 sourcefile_index) { |
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606 _source_file_name_index = sourcefile_index; |
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607 } |
0 | 608 |
609 // minor and major version numbers of class file | |
610 u2 minor_version() const { return _minor_version; } | |
611 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
612 u2 major_version() const { return _major_version; } | |
613 void set_major_version(u2 major_version) { _major_version = major_version; } | |
614 | |
615 // source debug extension | |
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616 char* source_debug_extension() const { return _source_debug_extension; } |
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617 void set_source_debug_extension(char* array, int length); |
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618 |
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619 // symbol unloading support (refcount already added) |
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620 Symbol* array_name() { return _array_name; } |
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621 void set_array_name(Symbol* name) { assert(_array_name == NULL || name == NULL, "name already created"); _array_name = name; } |
0 | 622 |
623 // nonstatic oop-map blocks | |
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624 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 625 return oop_map_count * OopMapBlock::size_in_words(); |
626 } | |
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627 unsigned int nonstatic_oop_map_count() const { |
938 | 628 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
629 } | |
630 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
631 void set_nonstatic_oop_map_size(int words) { | |
632 _nonstatic_oop_map_size = words; | |
633 } | |
0 | 634 |
635 // RedefineClasses() support for previous versions: | |
636 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
637 int emcp_method_count); | |
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638 // If the _previous_versions array is non-NULL, then this klass |
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639 // has been redefined at least once even if we aren't currently |
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640 // tracking a previous version. |
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641 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 642 bool has_previous_version() const; |
643 void init_previous_versions() { | |
644 _previous_versions = NULL; | |
645 } | |
646 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
647 return _previous_versions; | |
648 } | |
649 | |
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650 static void purge_previous_versions(InstanceKlass* ik); |
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651 |
0 | 652 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation |
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653 void set_cached_class_file(JvmtiCachedClassFileData *data) { |
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654 _cached_class_file = data; |
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655 } |
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656 JvmtiCachedClassFileData * get_cached_class_file() { return _cached_class_file; } |
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657 jint get_cached_class_file_len(); |
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658 unsigned char * get_cached_class_file_bytes(); |
0 | 659 |
660 // JVMTI: Support for caching of field indices, types, and offsets | |
661 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
662 _jvmti_cached_class_field_map = descriptor; | |
663 } | |
664 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
665 return _jvmti_cached_class_field_map; | |
666 } | |
667 | |
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668 bool has_default_methods() const { |
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669 return (_misc_flags & _misc_has_default_methods) != 0; |
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670 } |
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671 void set_has_default_methods(bool b) { |
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672 if (b) { |
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673 _misc_flags |= _misc_has_default_methods; |
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674 } else { |
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675 _misc_flags &= ~_misc_has_default_methods; |
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676 } |
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677 } |
6934 | 678 |
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679 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
0 | 680 inline u2 next_method_idnum(); |
681 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
682 | |
683 // generics support | |
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684 Symbol* generic_signature() const { |
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685 return (_generic_signature_index == 0) ? |
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686 (Symbol*)NULL : _constants->symbol_at(_generic_signature_index); |
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687 } |
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688 u2 generic_signature_index() const { |
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689 return _generic_signature_index; |
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690 } |
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691 void set_generic_signature_index(u2 sig_index) { |
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692 _generic_signature_index = sig_index; |
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693 } |
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694 |
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695 u2 enclosing_method_data(int offset); |
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696 u2 enclosing_method_class_index() { |
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697 return enclosing_method_data(enclosing_method_class_index_offset); |
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698 } |
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699 u2 enclosing_method_method_index() { |
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700 return enclosing_method_data(enclosing_method_method_index_offset); |
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701 } |
0 | 702 void set_enclosing_method_indices(u2 class_index, |
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703 u2 method_index); |
0 | 704 |
705 // jmethodID support | |
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706 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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707 methodHandle method_h); |
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708 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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709 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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710 jmethodID* to_dealloc_id_p, |
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711 jmethodID** to_dealloc_jmeths_p); |
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712 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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713 size_t *length_p, jmethodID* id_p); |
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714 jmethodID jmethod_id_or_null(Method* method); |
0 | 715 |
716 // annotations support | |
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717 Annotations* annotations() const { return _annotations; } |
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718 void set_annotations(Annotations* anno) { _annotations = anno; } |
8031 | 719 |
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720 AnnotationArray* class_annotations() const { |
8031 | 721 return (_annotations != NULL) ? _annotations->class_annotations() : NULL; |
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722 } |
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723 Array<AnnotationArray*>* fields_annotations() const { |
8031 | 724 return (_annotations != NULL) ? _annotations->fields_annotations() : NULL; |
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725 } |
8031 | 726 AnnotationArray* class_type_annotations() const { |
727 return (_annotations != NULL) ? _annotations->class_type_annotations() : NULL; | |
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728 } |
8031 | 729 Array<AnnotationArray*>* fields_type_annotations() const { |
730 return (_annotations != NULL) ? _annotations->fields_type_annotations() : NULL; | |
731 } | |
0 | 732 // allocation |
733 instanceOop allocate_instance(TRAPS); | |
734 | |
735 // additional member function to return a handle | |
736 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
737 | |
738 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
739 // Helper function | |
740 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
741 | |
742 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
743 // if not, throw either an Error or an Exception. | |
744 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
745 | |
746 // initialization | |
747 void call_class_initializer(TRAPS); | |
748 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
749 | |
750 // OopMapCache support | |
751 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
752 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
753 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
754 | |
755 // JNI identifier support (for static fields - for jni performance) | |
756 JNIid* jni_ids() { return _jni_ids; } | |
757 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
758 JNIid* jni_id_for(int offset); | |
759 | |
760 // maintenance of deoptimization dependencies | |
761 int mark_dependent_nmethods(DepChange& changes); | |
762 void add_dependent_nmethod(nmethod* nm); | |
763 void remove_dependent_nmethod(nmethod* nm); | |
764 | |
765 // On-stack replacement support | |
766 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
767 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
768 void add_osr_nmethod(nmethod* n); | |
769 void remove_osr_nmethod(nmethod* n); | |
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770 nmethod* lookup_osr_nmethod(const Method* m, int bci, int level, bool match_level) const; |
0 | 771 |
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772 // Breakpoint support (see methods on Method* for details) |
0 | 773 BreakpointInfo* breakpoints() const { return _breakpoints; }; |
774 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
775 | |
776 // support for stub routines | |
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777 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
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778 TRACE_DEFINE_OFFSET; |
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779 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
0 | 780 |
781 // subclass/subinterface checks | |
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782 bool implements_interface(Klass* k) const; |
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783 bool is_same_or_direct_interface(Klass* k) const; |
0 | 784 |
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785 // Access to the implementor of an interface. |
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786 Klass* implementor() const |
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787 { |
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788 Klass** k = adr_implementor(); |
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789 if (k == NULL) { |
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790 return NULL; |
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791 } else { |
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792 return *k; |
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793 } |
0 | 794 } |
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795 |
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796 void set_implementor(Klass* k) { |
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797 assert(is_interface(), "not interface"); |
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798 Klass** addr = adr_implementor(); |
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799 assert(addr != NULL, "null addr"); |
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800 if (addr != NULL) { |
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801 *addr = k; |
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802 } |
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803 } |
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804 |
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805 int nof_implementors() const { |
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806 Klass* k = implementor(); |
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807 if (k == NULL) { |
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808 return 0; |
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809 } else if (k != this) { |
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810 return 1; |
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811 } else { |
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812 return 2; |
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813 } |
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814 } |
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815 |
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816 void add_implementor(Klass* k); // k is a new class that implements this interface |
0 | 817 void init_implementor(); // initialize |
818 | |
819 // link this class into the implementors list of every interface it implements | |
820 void process_interfaces(Thread *thread); | |
821 | |
822 // virtual operations from Klass | |
823 bool is_leaf_class() const { return _subklass == NULL; } | |
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824 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
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825 bool compute_is_subtype_of(Klass* k); |
0 | 826 bool can_be_primary_super_slow() const; |
827 int oop_size(oop obj) const { return size_helper(); } | |
828 bool oop_is_instance_slow() const { return true; } | |
829 | |
830 // Iterators | |
831 void do_local_static_fields(FieldClosure* cl); | |
832 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
833 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
834 | |
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835 void methods_do(void f(Method* method)); |
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836 void array_klasses_do(void f(Klass* k)); |
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837 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
0 | 838 bool super_types_do(SuperTypeClosure* blk); |
839 | |
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840 // Casting from Klass* |
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841 static InstanceKlass* cast(Klass* k) { |
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842 assert(k->is_klass(), "must be"); |
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843 assert(k->oop_is_instance(), "cast to InstanceKlass"); |
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844 return (InstanceKlass*) k; |
0 | 845 } |
846 | |
6934 | 847 InstanceKlass* java_super() const { |
848 return (super() == NULL) ? NULL : cast(super()); | |
849 } | |
850 | |
0 | 851 // Sizing (in words) |
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852 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } |
8031 | 853 |
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854 static int size(int vtable_length, int itable_length, |
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855 int nonstatic_oop_map_size, |
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856 bool is_interface, bool is_anonymous) { |
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857 return align_object_size(header_size() + |
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858 align_object_offset(vtable_length) + |
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859 align_object_offset(itable_length) + |
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860 ((is_interface || is_anonymous) ? |
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861 align_object_offset(nonstatic_oop_map_size) : |
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862 nonstatic_oop_map_size) + |
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863 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + |
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864 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); |
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865 } |
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866 int size() const { return size(vtable_length(), |
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867 itable_length(), |
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868 nonstatic_oop_map_size(), |
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869 is_interface(), |
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870 is_anonymous()); |
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871 } |
7956 | 872 #if INCLUDE_SERVICES |
873 virtual void collect_statistics(KlassSizeStats *sz) const; | |
874 #endif | |
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875 |
0 | 876 static int vtable_start_offset() { return header_size(); } |
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877 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } |
0 | 878 |
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879 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } |
0 | 880 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } |
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881 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
0 | 882 |
883 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
884 | |
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885 address static_field_addr(int offset); |
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886 |
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887 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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888 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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889 } |
0 | 890 |
8031 | 891 Klass** end_of_nonstatic_oop_maps() const { |
892 return (Klass**)(start_of_nonstatic_oop_maps() + | |
893 nonstatic_oop_map_count()); | |
894 } | |
895 | |
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896 Klass** adr_implementor() const { |
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897 if (is_interface()) { |
8031 | 898 return (Klass**)end_of_nonstatic_oop_maps(); |
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899 } else { |
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900 return NULL; |
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901 } |
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902 }; |
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903 |
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904 Klass** adr_host_klass() const { |
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905 if (is_anonymous()) { |
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906 Klass** adr_impl = adr_implementor(); |
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907 if (adr_impl != NULL) { |
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908 return adr_impl + 1; |
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909 } else { |
8031 | 910 return end_of_nonstatic_oop_maps(); |
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911 } |
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912 } else { |
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913 return NULL; |
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914 } |
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915 } |
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916 |
0 | 917 // Use this to return the size of an instance in heap words: |
918 int size_helper() const { | |
919 return layout_helper_to_size_helper(layout_helper()); | |
920 } | |
921 | |
922 // This bit is initialized in classFileParser.cpp. | |
923 // It is false under any of the following conditions: | |
924 // - the class is abstract (including any interface) | |
925 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
926 // - the class size is larger than FastAllocateSizeLimit | |
927 // - the class is java/lang/Class, which cannot be allocated directly | |
928 bool can_be_fastpath_allocated() const { | |
929 return !layout_helper_needs_slow_path(layout_helper()); | |
930 } | |
931 | |
932 // Java vtable/itable | |
933 klassVtable* vtable() const; // return new klassVtable wrapper | |
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934 inline Method* method_at_vtable(int index); |
0 | 935 klassItable* itable() const; // return new klassItable wrapper |
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936 Method* method_at_itable(Klass* holder, int index, TRAPS); |
0 | 937 |
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938 #if INCLUDE_JVMTI |
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939 void adjust_default_methods(Method** old_methods, Method** new_methods, |
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940 int methods_length, bool* trace_name_printed); |
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941 #endif // INCLUDE_JVMTI |
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942 |
0 | 943 // Garbage collection |
944 void oop_follow_contents(oop obj); | |
945 int oop_adjust_pointers(oop obj); | |
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946 |
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947 void clean_implementors_list(BoolObjectClosure* is_alive); |
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948 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 949 |
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950 // Explicit metaspace deallocation of fields |
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951 // For RedefineClasses and class file parsing errors, we need to deallocate |
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952 // instanceKlasses and the metadata they point to. |
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953 void deallocate_contents(ClassLoaderData* loader_data); |
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954 static void deallocate_methods(ClassLoaderData* loader_data, |
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955 Array<Method*>* methods); |
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956 void static deallocate_interfaces(ClassLoaderData* loader_data, |
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957 Klass* super_klass, |
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958 Array<Klass*>* local_interfaces, |
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959 Array<Klass*>* transitive_interfaces); |
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960 |
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961 // The constant pool is on stack if any of the methods are executing or |
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962 // referenced by handles. |
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963 bool on_stack() const { return _constants->on_stack(); } |
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964 |
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965 // callbacks for actions during class unloading |
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966 static void notify_unload_class(InstanceKlass* ik); |
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967 static void release_C_heap_structures(InstanceKlass* ik); |
0 | 968 |
969 // Parallel Scavenge and Parallel Old | |
970 PARALLEL_GC_DECLS | |
971 | |
972 // Naming | |
1039
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973 const char* signature_name() const; |
0 | 974 |
975 // Iterators | |
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976 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
0 | 977 return oop_oop_iterate_v(obj, blk); |
978 } | |
979 | |
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980 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 981 return oop_oop_iterate_v_m(obj, blk, mr); |
982 } | |
983 | |
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984 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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985 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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986 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 987 MemRegion mr); |
988 | |
989 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
342
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990 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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991 |
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992 #if INCLUDE_ALL_GCS |
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993 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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994 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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995 |
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996 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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997 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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998 #endif // INCLUDE_ALL_GCS |
0 | 999 |
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1000 u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
10152
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1001 |
0 | 1002 private: |
1003 // initialization state | |
1004 #ifdef ASSERT | |
1005 void set_init_state(ClassState state); | |
1006 #else | |
4739
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1007 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 1008 #endif |
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1009 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 1010 void set_init_thread(Thread *thread) { _init_thread = thread; } |
1011 | |
977
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1012 // The RedefineClasses() API can cause new method idnums to be needed |
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1013 // which will cause the caches to grow. Safety requires different |
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1014 // cache management logic if the caches can grow instead of just |
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1015 // going from NULL to non-NULL. |
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1016 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 1017 jmethodID* methods_jmethod_ids_acquire() const |
1018 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
1019 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
1020 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
1021 | |
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1022 // Lock during initialization |
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1023 public: |
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1024 // Lock for (1) initialization; (2) access to the ConstantPool of this class. |
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1025 // Must be one per class and it has to be a VM internal object so java code |
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1026 // cannot lock it (like the mirror). |
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1027 // It has to be an object not a Mutex because it's held through java calls. |
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1028 oop init_lock() const; |
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1029 private: |
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1030 void fence_and_clear_init_lock(); |
0 | 1031 |
1032 // Static methods that are used to implement member methods where an exposed this pointer | |
1033 // is needed due to possible GCs | |
1034 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
1035 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
1036 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
1037 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
1038 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
1039 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
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1040 static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); |
0 | 1041 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); |
1042 /* jni_id_for_impl for jfieldID only */ | |
1043 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
1044 | |
1045 // Returns the array class for the n'th dimension | |
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1046 Klass* array_klass_impl(bool or_null, int n, TRAPS); |
0 | 1047 |
1048 // Returns the array class with this class as element type | |
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1049 Klass* array_klass_impl(bool or_null, TRAPS); |
0 | 1050 |
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1051 // Free CHeap allocated fields. |
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1052 void release_C_heap_structures(); |
0 | 1053 public: |
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1054 // CDS support - remove and restore oops from metadata. Oops are not shared. |
0 | 1055 virtual void remove_unshareable_info(); |
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1056 virtual void restore_unshareable_info(TRAPS); |
0 | 1057 |
1058 // jvm support | |
1059 jint compute_modifier_flags(TRAPS) const; | |
1060 | |
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1061 // JSR-292 support |
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1062 MemberNameTable* member_names() { return _member_names; } |
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1063 void set_member_names(MemberNameTable* member_names) { _member_names = member_names; } |
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1064 void add_member_name(int index, Handle member_name); |
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1065 oop get_member_name(int index); |
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1066 |
0 | 1067 public: |
1068 // JVMTI support | |
1069 jint jvmti_class_status() const; | |
1070 | |
1071 public: | |
1072 // Printing | |
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1073 #ifndef PRODUCT |
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1074 void print_on(outputStream* st) const; |
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1075 #endif |
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1076 void print_value_on(outputStream* st) const; |
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1077 |
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1078 void oop_print_value_on(oop obj, outputStream* st); |
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1079 |
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1080 #ifndef PRODUCT |
0 | 1081 void oop_print_on (oop obj, outputStream* st); |
1082 | |
1083 void print_dependent_nmethods(bool verbose = false); | |
1084 bool is_dependent_nmethod(nmethod* nm); | |
1085 #endif | |
1086 | |
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1087 const char* internal_name() const; |
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1088 |
0 | 1089 // Verification |
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1090 void verify_on(outputStream* st); |
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1091 |
0 | 1092 void oop_verify_on(oop obj, outputStream* st); |
1093 }; | |
1094 | |
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1095 inline Method* InstanceKlass::method_at_vtable(int index) { |
0 | 1096 #ifndef PRODUCT |
1097 assert(index >= 0, "valid vtable index"); | |
1098 if (DebugVtables) { | |
1099 verify_vtable_index(index); | |
1100 } | |
1101 #endif | |
1102 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
1103 return ve[index].method(); | |
1104 } | |
1105 | |
1106 // for adding methods | |
1107 // UNSET_IDNUM return means no more ids available | |
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1108 inline u2 InstanceKlass::next_method_idnum() { |
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1109 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
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1110 return ConstMethod::UNSET_IDNUM; // no more ids available |
0 | 1111 } else { |
1112 return _idnum_allocated_count++; | |
1113 } | |
1114 } | |
1115 | |
1116 | |
1117 /* JNIid class for jfieldIDs only */ | |
6197 | 1118 class JNIid: public CHeapObj<mtClass> { |
0 | 1119 friend class VMStructs; |
1120 private: | |
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1121 Klass* _holder; |
0 | 1122 JNIid* _next; |
1123 int _offset; | |
1124 #ifdef ASSERT | |
1125 bool _is_static_field_id; | |
1126 #endif | |
1127 | |
1128 public: | |
1129 // Accessors | |
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1130 Klass* holder() const { return _holder; } |
0 | 1131 int offset() const { return _offset; } |
1132 JNIid* next() { return _next; } | |
1133 // Constructor | |
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1134 JNIid(Klass* holder, int offset, JNIid* next); |
0 | 1135 // Identifier lookup |
1136 JNIid* find(int offset); | |
1137 | |
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1138 bool find_local_field(fieldDescriptor* fd) { |
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1139 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
2376
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1140 } |
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1141 |
0 | 1142 static void deallocate(JNIid* id); |
1143 // Debugging | |
1144 #ifdef ASSERT | |
1145 bool is_static_field_id() const { return _is_static_field_id; } | |
1146 void set_is_static_field_id() { _is_static_field_id = true; } | |
1147 #endif | |
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1148 void verify(Klass* holder); |
0 | 1149 }; |
1150 | |
1151 | |
1152 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1153 // consider compressing this data structure. | |
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1154 // It is currently a simple linked list defined in method.hpp. |
0 | 1155 |
1156 class BreakpointInfo; | |
1157 | |
1158 | |
1159 // A collection point for interesting information about the previous | |
12281
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1160 // version(s) of an InstanceKlass. A GrowableArray of PreviousVersionNodes |
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1161 // is attached to the InstanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1162 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1163 private: |
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1164 ConstantPool* _prev_constant_pool; |
47
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1165 |
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1166 // If the previous version of the InstanceKlass doesn't have any |
0 | 1167 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the |
1168 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1169 // have a length of zero. | |
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1170 GrowableArray<Method*>* _prev_EMCP_methods; |
0 | 1171 |
1172 public: | |
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1173 PreviousVersionNode(ConstantPool* prev_constant_pool, |
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1174 GrowableArray<Method*>* prev_EMCP_methods); |
0 | 1175 ~PreviousVersionNode(); |
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1176 ConstantPool* prev_constant_pool() const { |
0 | 1177 return _prev_constant_pool; |
1178 } | |
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1179 GrowableArray<Method*>* prev_EMCP_methods() const { |
0 | 1180 return _prev_EMCP_methods; |
1181 } | |
1182 }; | |
1183 | |
1184 | |
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1185 // Helper object for walking previous versions. |
0 | 1186 class PreviousVersionWalker : public StackObj { |
1187 private: | |
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1188 Thread* _thread; |
0 | 1189 GrowableArray<PreviousVersionNode *>* _previous_versions; |
1190 int _current_index; | |
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1191 |
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1192 // A pointer to the current node object so we can handle the deletes. |
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1193 PreviousVersionNode* _current_p; |
0 | 1194 |
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1195 // The constant pool handle keeps all the methods in this class from being |
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1196 // deallocated from the metaspace during class unloading. |
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1197 constantPoolHandle _current_constant_pool_handle; |
0 | 1198 |
1199 public: | |
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1200 PreviousVersionWalker(Thread* thread, InstanceKlass *ik); |
0 | 1201 |
1202 // Return the interesting information for the next previous version | |
1203 // of the klass. Returns NULL if there are no more previous versions. | |
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1204 PreviousVersionNode* next_previous_version(); |
0 | 1205 }; |
1972 | 1206 |
3939 | 1207 |
1208 // | |
1209 // nmethodBucket is used to record dependent nmethods for | |
1210 // deoptimization. nmethod dependencies are actually <klass, method> | |
1211 // pairs but we really only care about the klass part for purposes of | |
1212 // finding nmethods which might need to be deoptimized. Instead of | |
1213 // recording the method, a count of how many times a particular nmethod | |
1214 // was recorded is kept. This ensures that any recording errors are | |
1215 // noticed since an nmethod should be removed as many times are it's | |
1216 // added. | |
1217 // | |
6197 | 1218 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1219 friend class VMStructs; |
1220 private: | |
1221 nmethod* _nmethod; | |
1222 int _count; | |
1223 nmethodBucket* _next; | |
1224 | |
1225 public: | |
1226 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1227 _nmethod = nmethod; | |
1228 _next = next; | |
1229 _count = 1; | |
1230 } | |
1231 int count() { return _count; } | |
1232 int increment() { _count += 1; return _count; } | |
1233 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1234 nmethodBucket* next() { return _next; } | |
1235 void set_next(nmethodBucket* b) { _next = b; } | |
1236 nmethod* get_nmethod() { return _nmethod; } | |
1237 }; | |
1238 | |
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1239 // An iterator that's used to access the inner classes indices in the |
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1240 // InstanceKlass::_inner_classes array. |
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1241 class InnerClassesIterator : public StackObj { |
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1242 private: |
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1243 Array<jushort>* _inner_classes; |
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1244 int _length; |
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1245 int _idx; |
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1246 public: |
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1247 |
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1248 InnerClassesIterator(instanceKlassHandle k) { |
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1249 _inner_classes = k->inner_classes(); |
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1250 if (k->inner_classes() != NULL) { |
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1251 _length = _inner_classes->length(); |
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1252 // The inner class array's length should be the multiple of |
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1253 // inner_class_next_offset if it only contains the InnerClasses |
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1254 // attribute data, or it should be |
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1255 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1256 // if it also contains the EnclosingMethod data. |
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1257 assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
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1258 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
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1259 "just checking"); |
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1260 // Remove the enclosing_method portion if exists. |
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1261 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
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1262 _length -= InstanceKlass::enclosing_method_attribute_size; |
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1263 } |
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1264 } else { |
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1265 _length = 0; |
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1266 } |
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1267 _idx = 0; |
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1268 } |
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1269 |
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1270 int length() const { |
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1271 return _length; |
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1272 } |
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1273 |
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1274 void next() { |
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1275 _idx += InstanceKlass::inner_class_next_offset; |
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1276 } |
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1277 |
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1278 bool done() const { |
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1279 return (_idx >= _length); |
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1280 } |
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1281 |
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1282 u2 inner_class_info_index() const { |
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1283 return _inner_classes->at( |
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1284 _idx + InstanceKlass::inner_class_inner_class_info_offset); |
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1285 } |
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1286 |
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1287 void set_inner_class_info_index(u2 index) { |
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1288 _inner_classes->at_put( |
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1289 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
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1290 } |
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1291 |
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1292 u2 outer_class_info_index() const { |
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1293 return _inner_classes->at( |
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1294 _idx + InstanceKlass::inner_class_outer_class_info_offset); |
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1295 } |
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1296 |
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1297 void set_outer_class_info_index(u2 index) { |
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1298 _inner_classes->at_put( |
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1299 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
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1300 } |
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1301 |
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1302 u2 inner_name_index() const { |
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1303 return _inner_classes->at( |
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1304 _idx + InstanceKlass::inner_class_inner_name_offset); |
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1305 } |
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1306 |
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1307 void set_inner_name_index(u2 index) { |
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1308 _inner_classes->at_put( |
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1309 _idx + InstanceKlass::inner_class_inner_name_offset, index); |
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1310 } |
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1311 |
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1312 u2 inner_access_flags() const { |
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1313 return _inner_classes->at( |
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1314 _idx + InstanceKlass::inner_class_access_flags_offset); |
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1315 } |
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1316 }; |
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1317 |
1972 | 1318 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |