Mercurial > hg > graal-compiler
annotate src/share/vm/oops/instanceKlass.hpp @ 7168:73e64867adb7
8003690: Example code in JVMTI GetStackTrace documentation is broken
Summary: Fixed to minor errors in example code
Reviewed-by: sspitsyn, dholmes
author | mikael |
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date | Wed, 21 Nov 2012 09:02:13 -0800 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP |
26 #define SHARE_VM_OOPS_INSTANCEKLASS_HPP | |
27 | |
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28 #include "classfile/classLoaderData.hpp" |
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29 #include "oops/annotations.hpp" |
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30 #include "oops/constMethod.hpp" |
3938 | 31 #include "oops/fieldInfo.hpp" |
1972 | 32 #include "oops/instanceOop.hpp" |
33 #include "oops/klassVtable.hpp" | |
34 #include "runtime/handles.hpp" | |
35 #include "runtime/os.hpp" | |
36 #include "utilities/accessFlags.hpp" | |
37 #include "utilities/bitMap.inline.hpp" | |
38 | |
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39 // An InstanceKlass is the VM level representation of a Java class. |
0 | 40 // It contains all information needed for at class at execution runtime. |
41 | |
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42 // InstanceKlass layout: |
0 | 43 // [C++ vtbl pointer ] Klass |
44 // [subtype cache ] Klass | |
45 // [instance size ] Klass | |
46 // [java mirror ] Klass | |
47 // [super ] Klass | |
48 // [access_flags ] Klass | |
49 // [name ] Klass | |
50 // [first subklass ] Klass | |
51 // [next sibling ] Klass | |
52 // [array klasses ] | |
53 // [methods ] | |
54 // [local interfaces ] | |
55 // [transitive interfaces ] | |
56 // [fields ] | |
57 // [constants ] | |
58 // [class loader ] | |
59 // [protection domain ] | |
60 // [signers ] | |
61 // [source file name ] | |
62 // [inner classes ] | |
63 // [static field size ] | |
64 // [nonstatic field size ] | |
65 // [static oop fields size ] | |
66 // [nonstatic oop maps size ] | |
67 // [has finalize method ] | |
68 // [deoptimization mark bit ] | |
69 // [initialization state ] | |
70 // [initializing thread ] | |
71 // [Java vtable length ] | |
72 // [oop map cache (stack maps) ] | |
73 // [EMBEDDED Java vtable ] size in words = vtable_len | |
74 // [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size | |
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75 // The embedded nonstatic oop-map blocks are short pairs (offset, length) |
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76 // indicating where oops are located in instances of this klass. |
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77 // [EMBEDDED implementor of the interface] only exist for interface |
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78 // [EMBEDDED host klass ] only exist for an anonymous class (JSR 292 enabled) |
0 | 79 |
80 | |
81 // forward declaration for class -- see below for definition | |
82 class SuperTypeClosure; | |
83 class JNIid; | |
84 class jniIdMapBase; | |
85 class BreakpointInfo; | |
86 class fieldDescriptor; | |
87 class DepChange; | |
88 class nmethodBucket; | |
89 class PreviousVersionNode; | |
90 class JvmtiCachedClassFieldMap; | |
91 | |
92 // This is used in iterators below. | |
93 class FieldClosure: public StackObj { | |
94 public: | |
95 virtual void do_field(fieldDescriptor* fd) = 0; | |
96 }; | |
97 | |
98 #ifndef PRODUCT | |
99 // Print fields. | |
100 // If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields. | |
101 class FieldPrinter: public FieldClosure { | |
102 oop _obj; | |
103 outputStream* _st; | |
104 public: | |
105 FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {} | |
106 void do_field(fieldDescriptor* fd); | |
107 }; | |
108 #endif // !PRODUCT | |
109 | |
938 | 110 // ValueObjs embedded in klass. Describes where oops are located in instances of |
111 // this klass. | |
112 class OopMapBlock VALUE_OBJ_CLASS_SPEC { | |
113 public: | |
114 // Byte offset of the first oop mapped by this block. | |
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115 int offset() const { return _offset; } |
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116 void set_offset(int offset) { _offset = offset; } |
938 | 117 |
118 // Number of oops in this block. | |
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119 uint count() const { return _count; } |
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120 void set_count(uint count) { _count = count; } |
938 | 121 |
122 // sizeof(OopMapBlock) in HeapWords. | |
123 static const int size_in_words() { | |
124 return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >> | |
125 LogHeapWordSize; | |
126 } | |
127 | |
128 private: | |
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129 int _offset; |
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130 uint _count; |
938 | 131 }; |
132 | |
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133 class InstanceKlass: public Klass { |
0 | 134 friend class VMStructs; |
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135 friend class ClassFileParser; |
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136 friend class CompileReplay; |
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137 |
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138 protected: |
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139 // Constructor |
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140 InstanceKlass(int vtable_len, |
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141 int itable_len, |
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142 int static_field_size, |
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143 int nonstatic_oop_map_size, |
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144 ReferenceType rt, |
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145 AccessFlags access_flags, |
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146 bool is_anonymous); |
0 | 147 public: |
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148 static Klass* allocate_instance_klass(ClassLoaderData* loader_data, |
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149 int vtable_len, |
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150 int itable_len, |
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151 int static_field_size, |
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152 int nonstatic_oop_map_size, |
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153 ReferenceType rt, |
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154 AccessFlags access_flags, |
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155 Symbol* name, |
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156 Klass* super_klass, |
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157 KlassHandle host_klass, |
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158 TRAPS); |
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159 |
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160 InstanceKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); } |
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161 |
0 | 162 // See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description |
163 // of the class loading & initialization procedure, and the use of the states. | |
164 enum ClassState { | |
165 allocated, // allocated (but not yet linked) | |
166 loaded, // loaded and inserted in class hierarchy (but not linked yet) | |
167 linked, // successfully linked/verified (but not initialized yet) | |
168 being_initialized, // currently running class initializer | |
169 fully_initialized, // initialized (successfull final state) | |
170 initialization_error // error happened during initialization | |
171 }; | |
172 | |
173 protected: | |
174 // Protection domain. | |
175 oop _protection_domain; | |
176 // Class signers. | |
177 objArrayOop _signers; | |
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178 // Initialization lock. Must be one per class and it has to be a VM internal |
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179 // object so java code cannot lock it (like the mirror) |
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180 // It has to be an object not a Mutex because it's held through java calls. |
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181 volatile oop _init_lock; |
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182 |
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183 // Annotations for this class |
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184 Annotations* _annotations; |
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185 // Array classes holding elements of this class. |
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186 Klass* _array_klasses; |
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187 // Constant pool for this class. |
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188 ConstantPool* _constants; |
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189 // The InnerClasses attribute and EnclosingMethod attribute. The |
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190 // _inner_classes is an array of shorts. If the class has InnerClasses |
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191 // attribute, then the _inner_classes array begins with 4-tuples of shorts |
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192 // [inner_class_info_index, outer_class_info_index, |
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193 // inner_name_index, inner_class_access_flags] for the InnerClasses |
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194 // attribute. If the EnclosingMethod attribute exists, it occupies the |
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195 // last two shorts [class_index, method_index] of the array. If only |
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196 // the InnerClasses attribute exists, the _inner_classes array length is |
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197 // number_of_inner_classes * 4. If the class has both InnerClasses |
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198 // and EnclosingMethod attributes the _inner_classes array length is |
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199 // number_of_inner_classes * 4 + enclosing_method_attribute_size. |
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200 Array<jushort>* _inner_classes; |
0 | 201 |
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202 // Name of source file containing this klass, NULL if not specified. |
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203 Symbol* _source_file_name; |
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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 // Generic signature, or null if none. |
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209 Symbol* _generic_signature; |
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210 // Array name derived from this class which needs unreferencing |
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211 // if this class is unloaded. |
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212 Symbol* _array_name; |
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213 |
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214 // Number of heapOopSize words used by non-static fields in this klass |
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215 // (including inherited fields but after header_size()). |
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216 int _nonstatic_field_size; |
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217 int _static_field_size; // number words used by static fields (oop and non-oop) in this klass |
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218 u2 _static_oop_field_count;// number of static oop fields in this klass |
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219 u2 _java_fields_count; // The number of declared Java fields |
938 | 220 int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks |
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221 |
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222 bool _is_marked_dependent; // used for marking during flushing and deoptimization |
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223 enum { |
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224 _misc_rewritten = 1 << 0, // methods rewritten. |
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225 _misc_has_nonstatic_fields = 1 << 1, // for sizing with UseCompressedOops |
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226 _misc_should_verify_class = 1 << 2, // allow caching of preverification |
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227 _misc_is_anonymous = 1 << 3 // has embedded _inner_classes field |
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228 }; |
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229 u2 _misc_flags; |
0 | 230 u2 _minor_version; // minor version number of class file |
231 u2 _major_version; // major version number of class file | |
232 Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization) | |
233 int _vtable_len; // length of Java vtable (in words) | |
234 int _itable_len; // length of Java itable (in words) | |
235 OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily) | |
236 JNIid* _jni_ids; // First JNI identifier for static fields in this class | |
237 jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none | |
238 int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL | |
239 nmethodBucket* _dependencies; // list of dependent nmethods | |
240 nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class | |
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241 BreakpointInfo* _breakpoints; // bpt lists, managed by Method* |
0 | 242 // Array of interesting part(s) of the previous version(s) of this |
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243 // InstanceKlass. See PreviousVersionWalker below. |
0 | 244 GrowableArray<PreviousVersionNode *>* _previous_versions; |
245 // JVMTI fields can be moved to their own structure - see 6315920 | |
246 unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH | |
247 jint _cached_class_file_len; // JVMTI: length of above | |
248 JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration | |
6934 | 249 |
250 // true if class, superclass, or implemented interfaces have default methods | |
251 bool _has_default_methods; | |
252 | |
0 | 253 volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change |
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254 // Method array. |
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255 Array<Method*>* _methods; |
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256 // Interface (Klass*s) this class declares locally to implement. |
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257 Array<Klass*>* _local_interfaces; |
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258 // Interface (Klass*s) this class implements transitively. |
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259 Array<Klass*>* _transitive_interfaces; |
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260 // Int array containing the original order of method in the class file (for JVMTI). |
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261 Array<int>* _method_ordering; |
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262 // Instance and static variable information, starts with 6-tuples of shorts |
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263 // [access, name index, sig index, initval index, low_offset, high_offset] |
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264 // for all fields, followed by the generic signature data at the end of |
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265 // the array. Only fields with generic signature attributes have the generic |
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266 // signature data set in the array. The fields array looks like following: |
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267 // |
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268 // f1: [access, name index, sig index, initial value index, low_offset, high_offset] |
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269 // f2: [access, name index, sig index, initial value index, low_offset, high_offset] |
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270 // ... |
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271 // fn: [access, name index, sig index, initial value index, low_offset, high_offset] |
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272 // [generic signature index] |
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273 // [generic signature index] |
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274 // ... |
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275 Array<u2>* _fields; |
0 | 276 |
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277 // Class states are defined as ClassState (see above). |
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278 // Place the _init_state here to utilize the unused 2-byte after |
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279 // _idnum_allocated_count. |
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280 u1 _init_state; // state of class |
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281 |
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282 u1 _reference_type; // reference type |
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283 |
0 | 284 // embedded Java vtable follows here |
285 // embedded Java itables follows here | |
286 // embedded static fields follows here | |
287 // embedded nonstatic oop-map blocks follows here | |
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288 // embedded implementor of this interface follows here |
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289 // The embedded implementor only exists if the current klass is an |
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290 // iterface. The possible values of the implementor fall into following |
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291 // three cases: |
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292 // NULL: no implementor. |
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293 // A Klass* that's not itself: one implementor. |
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294 // Itsef: more than one implementors. |
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295 // embedded host klass follows here |
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296 // The embedded host klass only exists in an anonymous class for |
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297 // dynamic language support (JSR 292 enabled). The host class grants |
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298 // its access privileges to this class also. The host class is either |
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299 // named, or a previously loaded anonymous class. A non-anonymous class |
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300 // or an anonymous class loaded through normal classloading does not |
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301 // have this embedded field. |
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302 // |
0 | 303 |
304 friend class SystemDictionary; | |
305 | |
306 public: | |
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307 bool has_nonstatic_fields() const { |
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308 return (_misc_flags & _misc_has_nonstatic_fields) != 0; |
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309 } |
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310 void set_has_nonstatic_fields(bool b) { |
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311 if (b) { |
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312 _misc_flags |= _misc_has_nonstatic_fields; |
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313 } else { |
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314 _misc_flags &= ~_misc_has_nonstatic_fields; |
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315 } |
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316 } |
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317 |
0 | 318 // field sizes |
319 int nonstatic_field_size() const { return _nonstatic_field_size; } | |
320 void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; } | |
321 | |
322 int static_field_size() const { return _static_field_size; } | |
323 void set_static_field_size(int size) { _static_field_size = size; } | |
324 | |
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325 int static_oop_field_count() const { return (int)_static_oop_field_count; } |
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326 void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; } |
0 | 327 |
328 // Java vtable | |
329 int vtable_length() const { return _vtable_len; } | |
330 void set_vtable_length(int len) { _vtable_len = len; } | |
331 | |
332 // Java itable | |
333 int itable_length() const { return _itable_len; } | |
334 void set_itable_length(int len) { _itable_len = len; } | |
335 | |
336 // array klasses | |
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337 Klass* array_klasses() const { return _array_klasses; } |
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338 void set_array_klasses(Klass* k) { _array_klasses = k; } |
0 | 339 |
340 // methods | |
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341 Array<Method*>* methods() const { return _methods; } |
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342 void set_methods(Array<Method*>* a) { _methods = a; } |
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343 Method* method_with_idnum(int idnum); |
0 | 344 |
345 // method ordering | |
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346 Array<int>* method_ordering() const { return _method_ordering; } |
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347 void set_method_ordering(Array<int>* m) { _method_ordering = m; } |
0 | 348 |
349 // interfaces | |
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350 Array<Klass*>* local_interfaces() const { return _local_interfaces; } |
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351 void set_local_interfaces(Array<Klass*>* a) { |
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352 guarantee(_local_interfaces == NULL || a == NULL, "Just checking"); |
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353 _local_interfaces = a; } |
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354 Array<Klass*>* transitive_interfaces() const { return _transitive_interfaces; } |
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355 void set_transitive_interfaces(Array<Klass*>* a) { |
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356 guarantee(_transitive_interfaces == NULL || a == NULL, "Just checking"); |
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357 _transitive_interfaces = a; } |
0 | 358 |
3938 | 359 private: |
360 friend class fieldDescriptor; | |
361 FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); } | |
362 | |
363 public: | |
364 int field_offset (int index) const { return field(index)->offset(); } | |
365 int field_access_flags(int index) const { return field(index)->access_flags(); } | |
366 Symbol* field_name (int index) const { return field(index)->name(constants()); } | |
367 Symbol* field_signature (int index) const { return field(index)->signature(constants()); } | |
368 | |
369 // Number of Java declared fields | |
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370 int java_fields_count() const { return (int)_java_fields_count; } |
3938 | 371 |
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372 Array<u2>* fields() const { return _fields; } |
3938 | 373 |
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374 void set_fields(Array<u2>* f, u2 java_fields_count) { |
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375 guarantee(_fields == NULL || f == NULL, "Just checking"); |
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376 _fields = f; |
3938 | 377 _java_fields_count = java_fields_count; |
0 | 378 } |
379 | |
380 // inner classes | |
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381 Array<u2>* inner_classes() const { return _inner_classes; } |
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382 void set_inner_classes(Array<u2>* f) { _inner_classes = f; } |
0 | 383 |
384 enum InnerClassAttributeOffset { | |
385 // From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814 | |
386 inner_class_inner_class_info_offset = 0, | |
387 inner_class_outer_class_info_offset = 1, | |
388 inner_class_inner_name_offset = 2, | |
389 inner_class_access_flags_offset = 3, | |
390 inner_class_next_offset = 4 | |
391 }; | |
392 | |
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393 enum EnclosingMethodAttributeOffset { |
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394 enclosing_method_class_index_offset = 0, |
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395 enclosing_method_method_index_offset = 1, |
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396 enclosing_method_attribute_size = 2 |
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397 }; |
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398 |
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399 // method override check |
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400 bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS); |
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401 |
0 | 402 // package |
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403 bool is_same_class_package(Klass* class2); |
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404 bool is_same_class_package(oop classloader2, Symbol* classname2); |
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405 static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2); |
0 | 406 |
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407 // find an enclosing class (defined where original code was, in jvm.cpp!) |
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408 Klass* compute_enclosing_class(bool* inner_is_member, TRAPS) { |
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409 instanceKlassHandle self(THREAD, this); |
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410 return compute_enclosing_class_impl(self, inner_is_member, THREAD); |
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411 } |
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412 static Klass* compute_enclosing_class_impl(instanceKlassHandle self, |
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413 bool* inner_is_member, TRAPS); |
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414 |
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415 // tell if two classes have the same enclosing class (at package level) |
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416 bool is_same_package_member(Klass* class2, TRAPS) { |
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417 instanceKlassHandle self(THREAD, this); |
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418 return is_same_package_member_impl(self, class2, THREAD); |
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419 } |
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420 static bool is_same_package_member_impl(instanceKlassHandle self, |
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421 Klass* class2, TRAPS); |
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422 |
0 | 423 // initialization state |
424 bool is_loaded() const { return _init_state >= loaded; } | |
425 bool is_linked() const { return _init_state >= linked; } | |
426 bool is_initialized() const { return _init_state == fully_initialized; } | |
427 bool is_not_initialized() const { return _init_state < being_initialized; } | |
428 bool is_being_initialized() const { return _init_state == being_initialized; } | |
429 bool is_in_error_state() const { return _init_state == initialization_error; } | |
430 bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; } | |
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431 ClassState init_state() { return (ClassState)_init_state; } |
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432 bool is_rewritten() const { return (_misc_flags & _misc_rewritten) != 0; } |
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433 |
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434 // defineClass specified verification |
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435 bool should_verify_class() const { |
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436 return (_misc_flags & _misc_should_verify_class) != 0; |
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437 } |
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438 void set_should_verify_class(bool value) { |
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439 if (value) { |
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440 _misc_flags |= _misc_should_verify_class; |
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441 } else { |
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442 _misc_flags &= ~_misc_should_verify_class; |
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443 } |
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444 } |
0 | 445 |
446 // marking | |
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447 bool is_marked_dependent() const { return _is_marked_dependent; } |
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448 void set_is_marked_dependent(bool value) { _is_marked_dependent = value; } |
0 | 449 |
450 // initialization (virtuals from Klass) | |
451 bool should_be_initialized() const; // means that initialize should be called | |
452 void initialize(TRAPS); | |
453 void link_class(TRAPS); | |
454 bool link_class_or_fail(TRAPS); // returns false on failure | |
455 void unlink_class(); | |
456 void rewrite_class(TRAPS); | |
3748 | 457 void relocate_and_link_methods(TRAPS); |
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458 Method* class_initializer(); |
0 | 459 |
460 // set the class to initialized if no static initializer is present | |
461 void eager_initialize(Thread *thread); | |
462 | |
463 // reference type | |
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464 ReferenceType reference_type() const { return (ReferenceType)_reference_type; } |
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465 void set_reference_type(ReferenceType t) { |
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466 assert(t == (u1)t, "overflow"); |
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467 _reference_type = (u1)t; |
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468 } |
0 | 469 |
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470 static ByteSize reference_type_offset() { return in_ByteSize(offset_of(InstanceKlass, _reference_type)); } |
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471 |
0 | 472 // find local field, returns true if found |
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473 bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 474 // find field in direct superinterfaces, returns the interface in which the field is defined |
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475 Klass* find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 476 // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined |
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477 Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const; |
0 | 478 // 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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479 Klass* find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const; |
0 | 480 |
481 // find a non-static or static field given its offset within the class. | |
482 bool contains_field_offset(int offset) { | |
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483 return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size()); |
0 | 484 } |
485 | |
486 bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
487 bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const; | |
488 | |
489 // find a local method (returns NULL if not found) | |
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490 Method* find_method(Symbol* name, Symbol* signature) const; |
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491 static Method* find_method(Array<Method*>* methods, Symbol* name, Symbol* signature); |
0 | 492 |
493 // lookup operation (returns NULL if not found) | |
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494 Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 495 |
496 // lookup a method in all the interfaces that this class implements | |
497 // (returns NULL if not found) | |
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498 Method* lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const; |
0 | 499 |
6934 | 500 // Find method indices by name. If a method with the specified name is |
501 // found the index to the first method is returned, and 'end' is filled in | |
502 // with the index of first non-name-matching method. If no method is found | |
503 // -1 is returned. | |
504 int find_method_by_name(Symbol* name, int* end); | |
505 static int find_method_by_name(Array<Method*>* methods, Symbol* name, int* end); | |
506 | |
0 | 507 // constant pool |
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508 ConstantPool* constants() const { return _constants; } |
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509 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 510 |
511 // protection domain | |
512 oop protection_domain() { return _protection_domain; } | |
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513 void set_protection_domain(oop pd) { klass_oop_store(&_protection_domain, pd); } |
0 | 514 |
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515 // host class |
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516 Klass* host_klass() const { |
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517 Klass** hk = (Klass**)adr_host_klass(); |
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518 if (hk == NULL) { |
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519 return NULL; |
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520 } else { |
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521 return *hk; |
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522 } |
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523 } |
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524 void set_host_klass(Klass* host) { |
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525 assert(is_anonymous(), "not anonymous"); |
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526 Klass** addr = (Klass**)adr_host_klass(); |
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527 assert(addr != NULL, "no reversed space"); |
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528 *addr = host; |
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529 } |
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530 bool is_anonymous() const { |
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531 return (_misc_flags & _misc_is_anonymous) != 0; |
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532 } |
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533 void set_is_anonymous(bool value) { |
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534 if (value) { |
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535 _misc_flags |= _misc_is_anonymous; |
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536 } else { |
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537 _misc_flags &= ~_misc_is_anonymous; |
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538 } |
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539 } |
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540 |
0 | 541 // signers |
542 objArrayOop signers() const { return _signers; } | |
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543 void set_signers(objArrayOop s) { klass_oop_store((oop*)&_signers, s); } |
0 | 544 |
545 // source file name | |
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546 Symbol* source_file_name() const { return _source_file_name; } |
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547 void set_source_file_name(Symbol* n); |
0 | 548 |
549 // minor and major version numbers of class file | |
550 u2 minor_version() const { return _minor_version; } | |
551 void set_minor_version(u2 minor_version) { _minor_version = minor_version; } | |
552 u2 major_version() const { return _major_version; } | |
553 void set_major_version(u2 major_version) { _major_version = major_version; } | |
554 | |
555 // source debug extension | |
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556 char* source_debug_extension() const { return _source_debug_extension; } |
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557 void set_source_debug_extension(char* array, int length); |
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558 |
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559 // symbol unloading support (refcount already added) |
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560 Symbol* array_name() { return _array_name; } |
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561 void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; } |
0 | 562 |
563 // nonstatic oop-map blocks | |
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564 static int nonstatic_oop_map_size(unsigned int oop_map_count) { |
938 | 565 return oop_map_count * OopMapBlock::size_in_words(); |
566 } | |
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567 unsigned int nonstatic_oop_map_count() const { |
938 | 568 return _nonstatic_oop_map_size / OopMapBlock::size_in_words(); |
569 } | |
570 int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; } | |
571 void set_nonstatic_oop_map_size(int words) { | |
572 _nonstatic_oop_map_size = words; | |
573 } | |
0 | 574 |
575 // RedefineClasses() support for previous versions: | |
576 void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods, | |
577 int emcp_method_count); | |
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578 // If the _previous_versions array is non-NULL, then this klass |
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579 // has been redefined at least once even if we aren't currently |
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580 // tracking a previous version. |
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581 bool has_been_redefined() const { return _previous_versions != NULL; } |
0 | 582 bool has_previous_version() const; |
583 void init_previous_versions() { | |
584 _previous_versions = NULL; | |
585 } | |
586 GrowableArray<PreviousVersionNode *>* previous_versions() const { | |
587 return _previous_versions; | |
588 } | |
589 | |
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590 static void purge_previous_versions(InstanceKlass* ik); |
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591 |
0 | 592 // JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation |
593 void set_cached_class_file(unsigned char *class_file_bytes, | |
594 jint class_file_len) { _cached_class_file_len = class_file_len; | |
595 _cached_class_file_bytes = class_file_bytes; } | |
596 jint get_cached_class_file_len() { return _cached_class_file_len; } | |
597 unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; } | |
598 | |
599 // JVMTI: Support for caching of field indices, types, and offsets | |
600 void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) { | |
601 _jvmti_cached_class_field_map = descriptor; | |
602 } | |
603 JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const { | |
604 return _jvmti_cached_class_field_map; | |
605 } | |
606 | |
6934 | 607 bool has_default_methods() const { return _has_default_methods; } |
608 void set_has_default_methods(bool b) { _has_default_methods = b; } | |
609 | |
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610 // for adding methods, ConstMethod::UNSET_IDNUM means no more ids available |
0 | 611 inline u2 next_method_idnum(); |
612 void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; } | |
613 | |
614 // generics support | |
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615 Symbol* generic_signature() const { return _generic_signature; } |
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616 void set_generic_signature(Symbol* sig) { _generic_signature = sig; } |
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617 |
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618 u2 enclosing_method_data(int offset); |
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619 u2 enclosing_method_class_index() { |
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620 return enclosing_method_data(enclosing_method_class_index_offset); |
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621 } |
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622 u2 enclosing_method_method_index() { |
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623 return enclosing_method_data(enclosing_method_method_index_offset); |
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624 } |
0 | 625 void set_enclosing_method_indices(u2 class_index, |
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626 u2 method_index); |
0 | 627 |
628 // jmethodID support | |
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629 static jmethodID get_jmethod_id(instanceKlassHandle ik_h, |
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630 methodHandle method_h); |
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631 static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h, |
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632 size_t idnum, jmethodID new_id, jmethodID* new_jmeths, |
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633 jmethodID* to_dealloc_id_p, |
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634 jmethodID** to_dealloc_jmeths_p); |
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635 static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum, |
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636 size_t *length_p, jmethodID* id_p); |
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637 jmethodID jmethod_id_or_null(Method* method); |
0 | 638 |
639 // cached itable index support | |
640 void set_cached_itable_index(size_t idnum, int index); | |
641 int cached_itable_index(size_t idnum); | |
642 | |
643 // annotations support | |
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644 Annotations* annotations() const { return _annotations; } |
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645 void set_annotations(Annotations* anno) { _annotations = anno; } |
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646 AnnotationArray* class_annotations() const { |
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647 if (annotations() == NULL) return NULL; |
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648 return annotations()->class_annotations(); |
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649 } |
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650 Array<AnnotationArray*>* fields_annotations() const { |
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651 if (annotations() == NULL) return NULL; |
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652 return annotations()->fields_annotations(); |
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653 } |
0 | 654 |
655 // allocation | |
656 instanceOop allocate_instance(TRAPS); | |
657 | |
658 // additional member function to return a handle | |
659 instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); } | |
660 | |
661 objArrayOop allocate_objArray(int n, int length, TRAPS); | |
662 // Helper function | |
663 static instanceOop register_finalizer(instanceOop i, TRAPS); | |
664 | |
665 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
666 // if not, throw either an Error or an Exception. | |
667 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
668 | |
669 // initialization | |
670 void call_class_initializer(TRAPS); | |
671 void set_initialization_state_and_notify(ClassState state, TRAPS); | |
672 | |
673 // OopMapCache support | |
674 OopMapCache* oop_map_cache() { return _oop_map_cache; } | |
675 void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; } | |
676 void mask_for(methodHandle method, int bci, InterpreterOopMap* entry); | |
677 | |
678 // JNI identifier support (for static fields - for jni performance) | |
679 JNIid* jni_ids() { return _jni_ids; } | |
680 void set_jni_ids(JNIid* ids) { _jni_ids = ids; } | |
681 JNIid* jni_id_for(int offset); | |
682 | |
683 // maintenance of deoptimization dependencies | |
684 int mark_dependent_nmethods(DepChange& changes); | |
685 void add_dependent_nmethod(nmethod* nm); | |
686 void remove_dependent_nmethod(nmethod* nm); | |
687 | |
688 // On-stack replacement support | |
689 nmethod* osr_nmethods_head() const { return _osr_nmethods_head; }; | |
690 void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; }; | |
691 void add_osr_nmethod(nmethod* n); | |
692 void remove_osr_nmethod(nmethod* n); | |
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693 nmethod* lookup_osr_nmethod(Method* const m, int bci, int level, bool match_level) const; |
0 | 694 |
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695 // Breakpoint support (see methods on Method* for details) |
0 | 696 BreakpointInfo* breakpoints() const { return _breakpoints; }; |
697 void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; }; | |
698 | |
699 // support for stub routines | |
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700 static ByteSize init_state_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_state)); } |
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701 TRACE_DEFINE_OFFSET; |
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702 static ByteSize init_thread_offset() { return in_ByteSize(offset_of(InstanceKlass, _init_thread)); } |
0 | 703 |
704 // subclass/subinterface checks | |
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705 bool implements_interface(Klass* k) const; |
0 | 706 |
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707 // Access to the implementor of an interface. |
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708 Klass* implementor() const |
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709 { |
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710 Klass** k = adr_implementor(); |
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711 if (k == NULL) { |
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712 return NULL; |
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713 } else { |
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714 return *k; |
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715 } |
0 | 716 } |
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717 |
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718 void set_implementor(Klass* k) { |
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719 assert(is_interface(), "not interface"); |
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720 Klass** addr = adr_implementor(); |
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721 *addr = k; |
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722 } |
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723 |
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724 int nof_implementors() const { |
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725 Klass* k = implementor(); |
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726 if (k == NULL) { |
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727 return 0; |
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728 } else if (k != this) { |
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729 return 1; |
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730 } else { |
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731 return 2; |
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732 } |
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733 } |
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734 |
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735 void add_implementor(Klass* k); // k is a new class that implements this interface |
0 | 736 void init_implementor(); // initialize |
737 | |
738 // link this class into the implementors list of every interface it implements | |
739 void process_interfaces(Thread *thread); | |
740 | |
741 // virtual operations from Klass | |
742 bool is_leaf_class() const { return _subklass == NULL; } | |
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743 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
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744 bool compute_is_subtype_of(Klass* k); |
0 | 745 bool can_be_primary_super_slow() const; |
746 int oop_size(oop obj) const { return size_helper(); } | |
747 bool oop_is_instance_slow() const { return true; } | |
748 | |
749 // Iterators | |
750 void do_local_static_fields(FieldClosure* cl); | |
751 void do_nonstatic_fields(FieldClosure* cl); // including inherited fields | |
752 void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS); | |
753 | |
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754 void methods_do(void f(Method* method)); |
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755 void array_klasses_do(void f(Klass* k)); |
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756 void array_klasses_do(void f(Klass* k, TRAPS), TRAPS); |
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757 void with_array_klasses_do(void f(Klass* k)); |
0 | 758 bool super_types_do(SuperTypeClosure* blk); |
759 | |
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760 // Casting from Klass* |
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761 static InstanceKlass* cast(Klass* k) { |
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762 assert(k->is_klass(), "must be"); |
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763 assert(k->oop_is_instance(), "cast to InstanceKlass"); |
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764 return (InstanceKlass*) k; |
0 | 765 } |
766 | |
6934 | 767 InstanceKlass* java_super() const { |
768 return (super() == NULL) ? NULL : cast(super()); | |
769 } | |
770 | |
0 | 771 // Sizing (in words) |
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772 static int header_size() { return align_object_offset(sizeof(InstanceKlass)/HeapWordSize); } |
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773 static int size(int vtable_length, int itable_length, |
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774 int nonstatic_oop_map_size, |
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775 bool is_interface, bool is_anonymous) { |
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776 return align_object_size(header_size() + |
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777 align_object_offset(vtable_length) + |
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778 align_object_offset(itable_length) + |
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779 ((is_interface || is_anonymous) ? |
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780 align_object_offset(nonstatic_oop_map_size) : |
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781 nonstatic_oop_map_size) + |
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782 (is_interface ? (int)sizeof(Klass*)/HeapWordSize : 0) + |
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783 (is_anonymous ? (int)sizeof(Klass*)/HeapWordSize : 0)); |
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784 } |
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785 int size() const { return size(vtable_length(), |
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786 itable_length(), |
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787 nonstatic_oop_map_size(), |
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788 is_interface(), |
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789 is_anonymous()); |
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790 } |
5998
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791 |
0 | 792 static int vtable_start_offset() { return header_size(); } |
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793 static int vtable_length_offset() { return offset_of(InstanceKlass, _vtable_len) / HeapWordSize; } |
0 | 794 |
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795 intptr_t* start_of_vtable() const { return ((intptr_t*)this) + vtable_start_offset(); } |
0 | 796 intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); } |
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797 int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)this; } |
0 | 798 |
799 intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); } | |
800 | |
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801 address static_field_addr(int offset); |
113
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802 |
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803 OopMapBlock* start_of_nonstatic_oop_maps() const { |
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804 return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length())); |
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805 } |
0 | 806 |
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807 Klass** adr_implementor() const { |
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808 if (is_interface()) { |
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809 return (Klass**)(start_of_nonstatic_oop_maps() + |
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810 nonstatic_oop_map_count()); |
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811 } else { |
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812 return NULL; |
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813 } |
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814 }; |
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815 |
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816 Klass** adr_host_klass() const { |
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817 if (is_anonymous()) { |
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818 Klass** adr_impl = adr_implementor(); |
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819 if (adr_impl != NULL) { |
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820 return adr_impl + 1; |
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821 } else { |
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822 return (Klass**)(start_of_nonstatic_oop_maps() + |
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823 nonstatic_oop_map_count()); |
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824 } |
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825 } else { |
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826 return NULL; |
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827 } |
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828 } |
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829 |
0 | 830 // Allocation profiling support |
831 juint alloc_size() const { return _alloc_count * size_helper(); } | |
832 void set_alloc_size(juint n) {} | |
833 | |
834 // Use this to return the size of an instance in heap words: | |
835 int size_helper() const { | |
836 return layout_helper_to_size_helper(layout_helper()); | |
837 } | |
838 | |
839 // This bit is initialized in classFileParser.cpp. | |
840 // It is false under any of the following conditions: | |
841 // - the class is abstract (including any interface) | |
842 // - the class has a finalizer (if !RegisterFinalizersAtInit) | |
843 // - the class size is larger than FastAllocateSizeLimit | |
844 // - the class is java/lang/Class, which cannot be allocated directly | |
845 bool can_be_fastpath_allocated() const { | |
846 return !layout_helper_needs_slow_path(layout_helper()); | |
847 } | |
848 | |
849 // Java vtable/itable | |
850 klassVtable* vtable() const; // return new klassVtable wrapper | |
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851 inline Method* method_at_vtable(int index); |
0 | 852 klassItable* itable() const; // return new klassItable wrapper |
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853 Method* method_at_itable(Klass* holder, int index, TRAPS); |
0 | 854 |
855 // Garbage collection | |
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856 virtual void oops_do(OopClosure* cl); |
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857 |
0 | 858 void oop_follow_contents(oop obj); |
859 int oop_adjust_pointers(oop obj); | |
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860 |
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861 void clean_implementors_list(BoolObjectClosure* is_alive); |
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862 void clean_method_data(BoolObjectClosure* is_alive); |
0 | 863 |
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864 // Explicit metaspace deallocation of fields |
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865 // For RedefineClasses, we need to deallocate instanceKlasses |
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866 void deallocate_contents(ClassLoaderData* loader_data); |
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867 |
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868 // The constant pool is on stack if any of the methods are executing or |
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869 // referenced by handles. |
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870 bool on_stack() const { return _constants->on_stack(); } |
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871 |
0 | 872 void release_C_heap_structures(); |
873 | |
874 // Parallel Scavenge and Parallel Old | |
875 PARALLEL_GC_DECLS | |
876 | |
877 // Naming | |
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878 const char* signature_name() const; |
0 | 879 |
880 // Iterators | |
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881 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { |
0 | 882 return oop_oop_iterate_v(obj, blk); |
883 } | |
884 | |
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885 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 886 return oop_oop_iterate_v_m(obj, blk, mr); |
887 } | |
888 | |
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889 #define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ |
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890 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ |
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891 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ |
0 | 892 MemRegion mr); |
893 | |
894 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL) | |
342
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895 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL) |
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896 |
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897 #ifndef SERIALGC |
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898 #define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
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899 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk); |
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900 |
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901 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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902 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
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903 #endif // !SERIALGC |
0 | 904 |
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905 u2 idnum_allocated_count() const { return _idnum_allocated_count; } |
0 | 906 private: |
907 // initialization state | |
908 #ifdef ASSERT | |
909 void set_init_state(ClassState state); | |
910 #else | |
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911 void set_init_state(ClassState state) { _init_state = (u1)state; } |
0 | 912 #endif |
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913 void set_rewritten() { _misc_flags |= _misc_rewritten; } |
0 | 914 void set_init_thread(Thread *thread) { _init_thread = thread; } |
915 | |
977
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916 // The RedefineClasses() API can cause new method idnums to be needed |
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917 // which will cause the caches to grow. Safety requires different |
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918 // cache management logic if the caches can grow instead of just |
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919 // going from NULL to non-NULL. |
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920 bool idnum_can_increment() const { return has_been_redefined(); } |
0 | 921 jmethodID* methods_jmethod_ids_acquire() const |
922 { return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); } | |
923 void release_set_methods_jmethod_ids(jmethodID* jmeths) | |
924 { OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); } | |
925 | |
926 int* methods_cached_itable_indices_acquire() const | |
927 { return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); } | |
928 void release_set_methods_cached_itable_indices(int* indices) | |
929 { OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); } | |
930 | |
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931 // Lock during initialization |
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932 volatile oop init_lock() const; |
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933 void set_init_lock(oop value) { klass_oop_store(&_init_lock, value); } |
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934 void fence_and_clear_init_lock(); // after fully_initialized |
0 | 935 |
936 // Offsets for memory management | |
937 oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;} | |
938 oop* adr_signers() const { return (oop*)&this->_signers;} | |
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939 oop* adr_init_lock() const { return (oop*)&this->_init_lock;} |
0 | 940 |
941 // Static methods that are used to implement member methods where an exposed this pointer | |
942 // is needed due to possible GCs | |
943 static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
944 static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS); | |
945 static void initialize_impl (instanceKlassHandle this_oop, TRAPS); | |
946 static void eager_initialize_impl (instanceKlassHandle this_oop); | |
947 static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS); | |
948 static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS); | |
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949 static Klass* array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS); |
0 | 950 static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS); |
951 /* jni_id_for_impl for jfieldID only */ | |
952 static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset); | |
953 | |
954 // Returns the array class for the n'th dimension | |
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955 Klass* array_klass_impl(bool or_null, int n, TRAPS); |
0 | 956 |
957 // Returns the array class with this class as element type | |
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958 Klass* array_klass_impl(bool or_null, TRAPS); |
0 | 959 |
960 public: | |
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961 // CDS support - remove and restore oops from metadata. Oops are not shared. |
0 | 962 virtual void remove_unshareable_info(); |
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963 virtual void restore_unshareable_info(TRAPS); |
0 | 964 |
965 // jvm support | |
966 jint compute_modifier_flags(TRAPS) const; | |
967 | |
968 public: | |
969 // JVMTI support | |
970 jint jvmti_class_status() const; | |
971 | |
972 public: | |
973 // Printing | |
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974 #ifndef PRODUCT |
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975 void print_on(outputStream* st) const; |
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976 #endif |
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977 void print_value_on(outputStream* st) const; |
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978 |
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979 void oop_print_value_on(oop obj, outputStream* st); |
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980 |
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981 #ifndef PRODUCT |
0 | 982 void oop_print_on (oop obj, outputStream* st); |
983 | |
984 void print_dependent_nmethods(bool verbose = false); | |
985 bool is_dependent_nmethod(nmethod* nm); | |
986 #endif | |
987 | |
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988 const char* internal_name() const; |
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989 |
0 | 990 // Verification |
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991 void verify_on(outputStream* st); |
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992 |
0 | 993 void oop_verify_on(oop obj, outputStream* st); |
994 }; | |
995 | |
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996 inline Method* InstanceKlass::method_at_vtable(int index) { |
0 | 997 #ifndef PRODUCT |
998 assert(index >= 0, "valid vtable index"); | |
999 if (DebugVtables) { | |
1000 verify_vtable_index(index); | |
1001 } | |
1002 #endif | |
1003 vtableEntry* ve = (vtableEntry*)start_of_vtable(); | |
1004 return ve[index].method(); | |
1005 } | |
1006 | |
1007 // for adding methods | |
1008 // UNSET_IDNUM return means no more ids available | |
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1009 inline u2 InstanceKlass::next_method_idnum() { |
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1010 if (_idnum_allocated_count == ConstMethod::MAX_IDNUM) { |
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1011 return ConstMethod::UNSET_IDNUM; // no more ids available |
0 | 1012 } else { |
1013 return _idnum_allocated_count++; | |
1014 } | |
1015 } | |
1016 | |
1017 | |
1018 /* JNIid class for jfieldIDs only */ | |
6197 | 1019 class JNIid: public CHeapObj<mtClass> { |
0 | 1020 friend class VMStructs; |
1021 private: | |
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1022 Klass* _holder; |
0 | 1023 JNIid* _next; |
1024 int _offset; | |
1025 #ifdef ASSERT | |
1026 bool _is_static_field_id; | |
1027 #endif | |
1028 | |
1029 public: | |
1030 // Accessors | |
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1031 Klass* holder() const { return _holder; } |
0 | 1032 int offset() const { return _offset; } |
1033 JNIid* next() { return _next; } | |
1034 // Constructor | |
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1035 JNIid(Klass* holder, int offset, JNIid* next); |
0 | 1036 // Identifier lookup |
1037 JNIid* find(int offset); | |
1038 | |
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1039 bool find_local_field(fieldDescriptor* fd) { |
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1040 return InstanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd); |
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1041 } |
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1042 |
0 | 1043 static void deallocate(JNIid* id); |
1044 // Debugging | |
1045 #ifdef ASSERT | |
1046 bool is_static_field_id() const { return _is_static_field_id; } | |
1047 void set_is_static_field_id() { _is_static_field_id = true; } | |
1048 #endif | |
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1049 void verify(Klass* holder); |
0 | 1050 }; |
1051 | |
1052 | |
1053 // If breakpoints are more numerous than just JVMTI breakpoints, | |
1054 // consider compressing this data structure. | |
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1055 // It is currently a simple linked list defined in method.hpp. |
0 | 1056 |
1057 class BreakpointInfo; | |
1058 | |
1059 | |
1060 // A collection point for interesting information about the previous | |
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1061 // version(s) of an InstanceKlass. This class uses weak references to |
0 | 1062 // the information so that the information may be collected as needed |
47
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1063 // by the system. If the information is shared, then a regular |
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1064 // reference must be used because a weak reference would be seen as |
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1065 // collectible. A GrowableArray of PreviousVersionNodes is attached |
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1066 // to the InstanceKlass as needed. See PreviousVersionWalker below. |
6197 | 1067 class PreviousVersionNode : public CHeapObj<mtClass> { |
0 | 1068 private: |
47
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1069 // A shared ConstantPool is never collected so we'll always have |
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1070 // a reference to it so we can update items in the cache. We'll |
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1071 // have a weak reference to a non-shared ConstantPool until all |
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1072 // of the methods (EMCP or obsolete) have been collected; the |
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1073 // non-shared ConstantPool becomes collectible at that point. |
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1074 ConstantPool* _prev_constant_pool; // regular or weak reference |
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1075 bool _prev_cp_is_weak; // true if not a shared ConstantPool |
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1076 |
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1077 // If the previous version of the InstanceKlass doesn't have any |
0 | 1078 // EMCP methods, then _prev_EMCP_methods will be NULL. If all the |
1079 // EMCP methods have been collected, then _prev_EMCP_methods can | |
1080 // have a length of zero. | |
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1081 GrowableArray<Method*>* _prev_EMCP_methods; |
0 | 1082 |
1083 public: | |
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1084 PreviousVersionNode(ConstantPool* prev_constant_pool, bool prev_cp_is_weak, |
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1085 GrowableArray<Method*>* prev_EMCP_methods); |
0 | 1086 ~PreviousVersionNode(); |
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1087 ConstantPool* prev_constant_pool() const { |
0 | 1088 return _prev_constant_pool; |
1089 } | |
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1090 GrowableArray<Method*>* prev_EMCP_methods() const { |
0 | 1091 return _prev_EMCP_methods; |
1092 } | |
1093 }; | |
1094 | |
1095 | |
1096 // A Handle-ized version of PreviousVersionNode. | |
1097 class PreviousVersionInfo : public ResourceObj { | |
1098 private: | |
1099 constantPoolHandle _prev_constant_pool_handle; | |
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1100 // If the previous version of the InstanceKlass doesn't have any |
0 | 1101 // EMCP methods, then _prev_EMCP_methods will be NULL. Since the |
1102 // methods cannot be collected while we hold a handle, | |
1103 // _prev_EMCP_methods should never have a length of zero. | |
1104 GrowableArray<methodHandle>* _prev_EMCP_method_handles; | |
1105 | |
1106 public: | |
1107 PreviousVersionInfo(PreviousVersionNode *pv_node); | |
1108 ~PreviousVersionInfo(); | |
1109 constantPoolHandle prev_constant_pool_handle() const { | |
1110 return _prev_constant_pool_handle; | |
1111 } | |
1112 GrowableArray<methodHandle>* prev_EMCP_method_handles() const { | |
1113 return _prev_EMCP_method_handles; | |
1114 } | |
1115 }; | |
1116 | |
1117 | |
1118 // Helper object for walking previous versions. This helper cleans up | |
1119 // the Handles that it allocates when the helper object is destroyed. | |
1120 // The PreviousVersionInfo object returned by next_previous_version() | |
1121 // is only valid until a subsequent call to next_previous_version() or | |
1122 // the helper object is destroyed. | |
1123 class PreviousVersionWalker : public StackObj { | |
1124 private: | |
1125 GrowableArray<PreviousVersionNode *>* _previous_versions; | |
1126 int _current_index; | |
1127 // Fields for cleaning up when we are done walking the previous versions: | |
1128 // A HandleMark for the PreviousVersionInfo handles: | |
1129 HandleMark _hm; | |
1130 | |
1131 // It would be nice to have a ResourceMark field in this helper also, | |
1132 // but the ResourceMark code says to be careful to delete handles held | |
1133 // in GrowableArrays _before_ deleting the GrowableArray. Since we | |
1134 // can't guarantee the order in which the fields are destroyed, we | |
1135 // have to let the creator of the PreviousVersionWalker object do | |
1136 // the right thing. Also, adding a ResourceMark here causes an | |
1137 // include loop. | |
1138 | |
1139 // A pointer to the current info object so we can handle the deletes. | |
1140 PreviousVersionInfo * _current_p; | |
1141 | |
1142 public: | |
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1143 PreviousVersionWalker(InstanceKlass *ik); |
0 | 1144 ~PreviousVersionWalker(); |
1145 | |
1146 // Return the interesting information for the next previous version | |
1147 // of the klass. Returns NULL if there are no more previous versions. | |
1148 PreviousVersionInfo* next_previous_version(); | |
1149 }; | |
1972 | 1150 |
3939 | 1151 |
1152 // | |
1153 // nmethodBucket is used to record dependent nmethods for | |
1154 // deoptimization. nmethod dependencies are actually <klass, method> | |
1155 // pairs but we really only care about the klass part for purposes of | |
1156 // finding nmethods which might need to be deoptimized. Instead of | |
1157 // recording the method, a count of how many times a particular nmethod | |
1158 // was recorded is kept. This ensures that any recording errors are | |
1159 // noticed since an nmethod should be removed as many times are it's | |
1160 // added. | |
1161 // | |
6197 | 1162 class nmethodBucket: public CHeapObj<mtClass> { |
3939 | 1163 friend class VMStructs; |
1164 private: | |
1165 nmethod* _nmethod; | |
1166 int _count; | |
1167 nmethodBucket* _next; | |
1168 | |
1169 public: | |
1170 nmethodBucket(nmethod* nmethod, nmethodBucket* next) { | |
1171 _nmethod = nmethod; | |
1172 _next = next; | |
1173 _count = 1; | |
1174 } | |
1175 int count() { return _count; } | |
1176 int increment() { _count += 1; return _count; } | |
1177 int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; } | |
1178 nmethodBucket* next() { return _next; } | |
1179 void set_next(nmethodBucket* b) { _next = b; } | |
1180 nmethod* get_nmethod() { return _nmethod; } | |
1181 }; | |
1182 | |
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1183 // An iterator that's used to access the inner classes indices in the |
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1184 // InstanceKlass::_inner_classes array. |
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1185 class InnerClassesIterator : public StackObj { |
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1186 private: |
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1187 Array<jushort>* _inner_classes; |
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1188 int _length; |
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1189 int _idx; |
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1190 public: |
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1191 |
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1192 InnerClassesIterator(instanceKlassHandle k) { |
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1193 _inner_classes = k->inner_classes(); |
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1194 if (k->inner_classes() != NULL) { |
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1195 _length = _inner_classes->length(); |
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1196 // The inner class array's length should be the multiple of |
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1197 // inner_class_next_offset if it only contains the InnerClasses |
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1198 // attribute data, or it should be |
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1199 // n*inner_class_next_offset+enclosing_method_attribute_size |
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1200 // if it also contains the EnclosingMethod data. |
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1201 assert((_length % InstanceKlass::inner_class_next_offset == 0 || |
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1202 _length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size), |
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1203 "just checking"); |
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1204 // Remove the enclosing_method portion if exists. |
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1205 if (_length % InstanceKlass::inner_class_next_offset == InstanceKlass::enclosing_method_attribute_size) { |
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1206 _length -= InstanceKlass::enclosing_method_attribute_size; |
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1207 } |
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1208 } else { |
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1209 _length = 0; |
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1210 } |
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1211 _idx = 0; |
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1212 } |
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1213 |
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1214 int length() const { |
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1215 return _length; |
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1216 } |
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1217 |
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1218 void next() { |
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1219 _idx += InstanceKlass::inner_class_next_offset; |
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1220 } |
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1221 |
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1222 bool done() const { |
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1223 return (_idx >= _length); |
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1224 } |
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1225 |
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1226 u2 inner_class_info_index() const { |
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1227 return _inner_classes->at( |
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1228 _idx + InstanceKlass::inner_class_inner_class_info_offset); |
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1229 } |
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1230 |
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1231 void set_inner_class_info_index(u2 index) { |
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1232 _inner_classes->at_put( |
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1233 _idx + InstanceKlass::inner_class_inner_class_info_offset, index); |
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1234 } |
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1235 |
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1236 u2 outer_class_info_index() const { |
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1237 return _inner_classes->at( |
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1238 _idx + InstanceKlass::inner_class_outer_class_info_offset); |
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1239 } |
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1240 |
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1241 void set_outer_class_info_index(u2 index) { |
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1242 _inner_classes->at_put( |
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1243 _idx + InstanceKlass::inner_class_outer_class_info_offset, index); |
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1244 } |
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1245 |
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1246 u2 inner_name_index() const { |
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1247 return _inner_classes->at( |
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1248 _idx + InstanceKlass::inner_class_inner_name_offset); |
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1249 } |
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1250 |
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1251 void set_inner_name_index(u2 index) { |
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1252 _inner_classes->at_put( |
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1253 _idx + InstanceKlass::inner_class_inner_name_offset, index); |
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1254 } |
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1255 |
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1256 u2 inner_access_flags() const { |
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1257 return _inner_classes->at( |
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1258 _idx + InstanceKlass::inner_class_access_flags_offset); |
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1259 } |
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1260 }; |
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1261 |
1972 | 1262 #endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP |