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comparison src/share/vm/memory/universe.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents 24b9c7f4cae6
children 2a48c84f1d04
comparison
equal deleted inserted replaced
6724:36d1d483d5d6 6725:da91efe96a93
24 24
25 #ifndef SHARE_VM_MEMORY_UNIVERSE_HPP 25 #ifndef SHARE_VM_MEMORY_UNIVERSE_HPP
26 #define SHARE_VM_MEMORY_UNIVERSE_HPP 26 #define SHARE_VM_MEMORY_UNIVERSE_HPP
27 27
28 #include "runtime/handles.hpp" 28 #include "runtime/handles.hpp"
29 #include "utilities/array.hpp"
29 #include "utilities/growableArray.hpp" 30 #include "utilities/growableArray.hpp"
30 31
31 // Universe is a name space holding known system classes and objects in the VM. 32 // Universe is a name space holding known system classes and objects in the VM.
32 // 33 //
33 // Loaded classes are accessible through the SystemDictionary. 34 // Loaded classes are accessible through the SystemDictionary.
38 39
39 class CollectedHeap; 40 class CollectedHeap;
40 class DeferredObjAllocEvent; 41 class DeferredObjAllocEvent;
41 42
42 43
43 // Common parts of a methodOop cache. This cache safely interacts with 44 // Common parts of a Method* cache. This cache safely interacts with
44 // the RedefineClasses API. 45 // the RedefineClasses API.
45 // 46 //
46 class CommonMethodOopCache : public CHeapObj<mtClass> { 47 class CommonMethodOopCache : public CHeapObj<mtClass> {
47 // We save the klassOop and the idnum of methodOop in order to get 48 // We save the Klass* and the idnum of Method* in order to get
48 // the current cached methodOop. 49 // the current cached Method*.
49 private: 50 private:
50 klassOop _klass; 51 Klass* _klass;
51 int _method_idnum; 52 int _method_idnum;
52 53
53 public: 54 public:
54 CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } 55 CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; }
55 ~CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } 56 ~CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; }
56 57
57 void init(klassOop k, methodOop m, TRAPS); 58 void init(Klass* k, Method* m, TRAPS);
58 klassOop klass() const { return _klass; } 59 Klass* klass() const { return _klass; }
59 int method_idnum() const { return _method_idnum; } 60 int method_idnum() const { return _method_idnum; }
60 61
61 // GC support 62 // Enhanced Class Redefinition support
62 void oops_do(OopClosure* f) { f->do_oop((oop*)&_klass); } 63 void classes_do(void f(Klass*)) {
63 }; 64 f(_klass);
64 65 }
65 66
66 // A helper class for caching a methodOop when the user of the cache 67 // CDS support. Replace the klass in this with the archive version
67 // cares about all versions of the methodOop. 68 // could use this for Enhanced Class Redefinition also.
69 void serialize(SerializeClosure* f) {
70 f->do_ptr((void**)&_klass);
71 }
72 };
73
74
75 // A helper class for caching a Method* when the user of the cache
76 // cares about all versions of the Method*.
68 // 77 //
69 class ActiveMethodOopsCache : public CommonMethodOopCache { 78 class ActiveMethodOopsCache : public CommonMethodOopCache {
70 // This subclass adds weak references to older versions of the 79 // This subclass adds weak references to older versions of the
71 // methodOop and a query method for a methodOop. 80 // Method* and a query method for a Method*.
72 81
73 private: 82 private:
74 // If the cached methodOop has not been redefined, then 83 // If the cached Method* has not been redefined, then
75 // _prev_methods will be NULL. If all of the previous 84 // _prev_methods will be NULL. If all of the previous
76 // versions of the method have been collected, then 85 // versions of the method have been collected, then
77 // _prev_methods can have a length of zero. 86 // _prev_methods can have a length of zero.
78 GrowableArray<jweak>* _prev_methods; 87 GrowableArray<Method*>* _prev_methods;
79 88
80 public: 89 public:
81 ActiveMethodOopsCache() { _prev_methods = NULL; } 90 ActiveMethodOopsCache() { _prev_methods = NULL; }
82 ~ActiveMethodOopsCache(); 91 ~ActiveMethodOopsCache();
83 92
84 void add_previous_version(const methodOop method); 93 void add_previous_version(Method* const method);
85 bool is_same_method(const methodOop method) const; 94 bool is_same_method(Method* const method) const;
86 }; 95 };
87 96
88 97
89 // A helper class for caching a methodOop when the user of the cache 98 // A helper class for caching a Method* when the user of the cache
90 // only cares about the latest version of the methodOop. 99 // only cares about the latest version of the Method*.
91 // 100 //
92 class LatestMethodOopCache : public CommonMethodOopCache { 101 class LatestMethodOopCache : public CommonMethodOopCache {
93 // This subclass adds a getter method for the latest methodOop. 102 // This subclass adds a getter method for the latest Method*.
94 103
95 public: 104 public:
96 methodOop get_methodOop(); 105 Method* get_Method();
97 }; 106 };
98 107
99 // For UseCompressedOops. 108 // For UseCompressedOops.
100 struct NarrowOopStruct { 109 struct NarrowOopStruct {
101 // Base address for oop-within-java-object materialization. 110 // Base address for oop-within-java-object materialization.
124 friend class oopDesc; 133 friend class oopDesc;
125 friend class ClassLoader; 134 friend class ClassLoader;
126 friend class Arguments; 135 friend class Arguments;
127 friend class SystemDictionary; 136 friend class SystemDictionary;
128 friend class VMStructs; 137 friend class VMStructs;
129 friend class CompactingPermGenGen;
130 friend class VM_PopulateDumpSharedSpace; 138 friend class VM_PopulateDumpSharedSpace;
131 139
132 friend jint universe_init(); 140 friend jint universe_init();
133 friend void universe2_init(); 141 friend void universe2_init();
134 friend bool universe_post_init(); 142 friend bool universe_post_init();
135 143
136 private: 144 private:
137 // Known classes in the VM 145 // Known classes in the VM
138 static klassOop _boolArrayKlassObj; 146 static Klass* _boolArrayKlassObj;
139 static klassOop _byteArrayKlassObj; 147 static Klass* _byteArrayKlassObj;
140 static klassOop _charArrayKlassObj; 148 static Klass* _charArrayKlassObj;
141 static klassOop _intArrayKlassObj; 149 static Klass* _intArrayKlassObj;
142 static klassOop _shortArrayKlassObj; 150 static Klass* _shortArrayKlassObj;
143 static klassOop _longArrayKlassObj; 151 static Klass* _longArrayKlassObj;
144 static klassOop _singleArrayKlassObj; 152 static Klass* _singleArrayKlassObj;
145 static klassOop _doubleArrayKlassObj; 153 static Klass* _doubleArrayKlassObj;
146 static klassOop _typeArrayKlassObjs[T_VOID+1]; 154 static Klass* _typeArrayKlassObjs[T_VOID+1];
147 155
148 static klassOop _objectArrayKlassObj; 156 static Klass* _objectArrayKlassObj;
149
150 static klassOop _methodKlassObj;
151 static klassOop _constMethodKlassObj;
152 static klassOop _methodDataKlassObj;
153 static klassOop _klassKlassObj;
154 static klassOop _arrayKlassKlassObj;
155 static klassOop _objArrayKlassKlassObj;
156 static klassOop _typeArrayKlassKlassObj;
157 static klassOop _instanceKlassKlassObj;
158 static klassOop _constantPoolKlassObj;
159 static klassOop _constantPoolCacheKlassObj;
160 static klassOop _compiledICHolderKlassObj;
161 static klassOop _systemObjArrayKlassObj;
162 157
163 // Known objects in the VM 158 // Known objects in the VM
164 159
165 // Primitive objects 160 // Primitive objects
166 static oop _int_mirror; 161 static oop _int_mirror;
174 static oop _void_mirror; 169 static oop _void_mirror;
175 170
176 static oop _main_thread_group; // Reference to the main thread group object 171 static oop _main_thread_group; // Reference to the main thread group object
177 static oop _system_thread_group; // Reference to the system thread group object 172 static oop _system_thread_group; // Reference to the system thread group object
178 173
179 static typeArrayOop _the_empty_byte_array; // Canonicalized byte array
180 static typeArrayOop _the_empty_short_array; // Canonicalized short array
181 static typeArrayOop _the_empty_int_array; // Canonicalized int array
182 static objArrayOop _the_empty_system_obj_array; // Canonicalized system obj array
183 static objArrayOop _the_empty_class_klass_array; // Canonicalized obj array of type java.lang.Class 174 static objArrayOop _the_empty_class_klass_array; // Canonicalized obj array of type java.lang.Class
184 static objArrayOop _the_array_interfaces_array; // Canonicalized 2-array of cloneable & serializable klasses
185 static oop _the_null_string; // A cache of "null" as a Java string 175 static oop _the_null_string; // A cache of "null" as a Java string
186 static oop _the_min_jint_string; // A cache of "-2147483648" as a Java string 176 static oop _the_min_jint_string; // A cache of "-2147483648" as a Java string
187 static LatestMethodOopCache* _finalizer_register_cache; // static method for registering finalizable objects 177 static LatestMethodOopCache* _finalizer_register_cache; // static method for registering finalizable objects
188 static LatestMethodOopCache* _loader_addClass_cache; // method for registering loaded classes in class loader vector
189 static ActiveMethodOopsCache* _reflect_invoke_cache; // method for security checks 178 static ActiveMethodOopsCache* _reflect_invoke_cache; // method for security checks
190 static oop _out_of_memory_error_java_heap; // preallocated error object (no backtrace) 179 static oop _out_of_memory_error_java_heap; // preallocated error object (no backtrace)
191 static oop _out_of_memory_error_perm_gen; // preallocated error object (no backtrace) 180 static oop _out_of_memory_error_perm_gen; // preallocated error object (no backtrace)
192 static oop _out_of_memory_error_array_size;// preallocated error object (no backtrace) 181 static oop _out_of_memory_error_array_size;// preallocated error object (no backtrace)
193 static oop _out_of_memory_error_gc_overhead_limit; // preallocated error object (no backtrace) 182 static oop _out_of_memory_error_gc_overhead_limit; // preallocated error object (no backtrace)
183
184 static Array<int>* _the_empty_int_array; // Canonicalized int array
185 static Array<u2>* _the_empty_short_array; // Canonicalized short array
186 static Array<Klass*>* _the_empty_klass_array; // Canonicalized klass obj array
187 static Array<Method*>* _the_empty_method_array; // Canonicalized method obj array
188
189 static Array<Klass*>* _the_array_interfaces_array;
194 190
195 // array of preallocated error objects with backtrace 191 // array of preallocated error objects with backtrace
196 static objArrayOop _preallocated_out_of_memory_error_array; 192 static objArrayOop _preallocated_out_of_memory_error_array;
197 193
198 // number of preallocated error objects available for use 194 // number of preallocated error objects available for use
248 static oop check_mirror(oop m) { 244 static oop check_mirror(oop m) {
249 assert(m != NULL, "mirror not initialized"); 245 assert(m != NULL, "mirror not initialized");
250 return m; 246 return m;
251 } 247 }
252 248
253 // Debugging
254 static int _verify_count; // number of verifies done
255 // True during call to verify(). Should only be set/cleared in verify().
256 static bool _verify_in_progress;
257
258 static void compute_verify_oop_data();
259
260 public:
261 // Known classes in the VM
262 static klassOop boolArrayKlassObj() { return _boolArrayKlassObj; }
263 static klassOop byteArrayKlassObj() { return _byteArrayKlassObj; }
264 static klassOop charArrayKlassObj() { return _charArrayKlassObj; }
265 static klassOop intArrayKlassObj() { return _intArrayKlassObj; }
266 static klassOop shortArrayKlassObj() { return _shortArrayKlassObj; }
267 static klassOop longArrayKlassObj() { return _longArrayKlassObj; }
268 static klassOop singleArrayKlassObj() { return _singleArrayKlassObj; }
269 static klassOop doubleArrayKlassObj() { return _doubleArrayKlassObj; }
270
271 static klassOop objectArrayKlassObj() {
272 return _objectArrayKlassObj;
273 }
274
275 static klassOop typeArrayKlassObj(BasicType t) {
276 assert((uint)t < T_VOID+1, err_msg("range check for type: %s", type2name(t)));
277 assert(_typeArrayKlassObjs[t] != NULL, "domain check");
278 return _typeArrayKlassObjs[t];
279 }
280
281 static klassOop methodKlassObj() { return _methodKlassObj; }
282 static klassOop constMethodKlassObj() { return _constMethodKlassObj; }
283 static klassOop methodDataKlassObj() { return _methodDataKlassObj; }
284 static klassOop klassKlassObj() { return _klassKlassObj; }
285 static klassOop arrayKlassKlassObj() { return _arrayKlassKlassObj; }
286 static klassOop objArrayKlassKlassObj() { return _objArrayKlassKlassObj; }
287 static klassOop typeArrayKlassKlassObj() { return _typeArrayKlassKlassObj; }
288 static klassOop instanceKlassKlassObj() { return _instanceKlassKlassObj; }
289 static klassOop constantPoolKlassObj() { return _constantPoolKlassObj; }
290 static klassOop constantPoolCacheKlassObj() { return _constantPoolCacheKlassObj; }
291 static klassOop compiledICHolderKlassObj() { return _compiledICHolderKlassObj; }
292 static klassOop systemObjArrayKlassObj() { return _systemObjArrayKlassObj; }
293
294 // Known objects in the VM
295 static oop int_mirror() { return check_mirror(_int_mirror); }
296 static oop float_mirror() { return check_mirror(_float_mirror); }
297 static oop double_mirror() { return check_mirror(_double_mirror); }
298 static oop byte_mirror() { return check_mirror(_byte_mirror); }
299 static oop bool_mirror() { return check_mirror(_bool_mirror); }
300 static oop char_mirror() { return check_mirror(_char_mirror); }
301 static oop long_mirror() { return check_mirror(_long_mirror); }
302 static oop short_mirror() { return check_mirror(_short_mirror); }
303 static oop void_mirror() { return check_mirror(_void_mirror); }
304
305 // table of same
306 static oop _mirrors[T_VOID+1];
307
308 static oop java_mirror(BasicType t) {
309 assert((uint)t < T_VOID+1, "range check");
310 return check_mirror(_mirrors[t]);
311 }
312 static oop main_thread_group() { return _main_thread_group; }
313 static void set_main_thread_group(oop group) { _main_thread_group = group;}
314
315 static oop system_thread_group() { return _system_thread_group; }
316 static void set_system_thread_group(oop group) { _system_thread_group = group;}
317
318 static typeArrayOop the_empty_byte_array() { return _the_empty_byte_array; }
319 static typeArrayOop the_empty_short_array() { return _the_empty_short_array; }
320 static typeArrayOop the_empty_int_array() { return _the_empty_int_array; }
321 static objArrayOop the_empty_system_obj_array () { return _the_empty_system_obj_array; }
322 static objArrayOop the_empty_class_klass_array () { return _the_empty_class_klass_array; }
323 static objArrayOop the_array_interfaces_array() { return _the_array_interfaces_array; }
324 static oop the_null_string() { return _the_null_string; }
325 static oop the_min_jint_string() { return _the_min_jint_string; }
326 static methodOop finalizer_register_method() { return _finalizer_register_cache->get_methodOop(); }
327 static methodOop loader_addClass_method() { return _loader_addClass_cache->get_methodOop(); }
328 static ActiveMethodOopsCache* reflect_invoke_cache() { return _reflect_invoke_cache; }
329 static oop null_ptr_exception_instance() { return _null_ptr_exception_instance; }
330 static oop arithmetic_exception_instance() { return _arithmetic_exception_instance; }
331 static oop virtual_machine_error_instance() { return _virtual_machine_error_instance; }
332 static oop vm_exception() { return _vm_exception; }
333
334 // OutOfMemoryError support. Returns an error with the required message. The returned error
335 // may or may not have a backtrace. If error has a backtrace then the stack trace is already
336 // filled in.
337 static oop out_of_memory_error_java_heap() { return gen_out_of_memory_error(_out_of_memory_error_java_heap); }
338 static oop out_of_memory_error_perm_gen() { return gen_out_of_memory_error(_out_of_memory_error_perm_gen); }
339 static oop out_of_memory_error_array_size() { return gen_out_of_memory_error(_out_of_memory_error_array_size); }
340 static oop out_of_memory_error_gc_overhead_limit() { return gen_out_of_memory_error(_out_of_memory_error_gc_overhead_limit); }
341
342 // Accessors needed for fast allocation
343 static klassOop* boolArrayKlassObj_addr() { return &_boolArrayKlassObj; }
344 static klassOop* byteArrayKlassObj_addr() { return &_byteArrayKlassObj; }
345 static klassOop* charArrayKlassObj_addr() { return &_charArrayKlassObj; }
346 static klassOop* intArrayKlassObj_addr() { return &_intArrayKlassObj; }
347 static klassOop* shortArrayKlassObj_addr() { return &_shortArrayKlassObj; }
348 static klassOop* longArrayKlassObj_addr() { return &_longArrayKlassObj; }
349 static klassOop* singleArrayKlassObj_addr() { return &_singleArrayKlassObj; }
350 static klassOop* doubleArrayKlassObj_addr() { return &_doubleArrayKlassObj; }
351 static klassOop* systemObjArrayKlassObj_addr() { return &_systemObjArrayKlassObj; }
352
353 // The particular choice of collected heap.
354 static CollectedHeap* heap() { return _collectedHeap; }
355
356 // For UseCompressedOops
357 static address* narrow_oop_base_addr() { return &_narrow_oop._base; }
358 static address narrow_oop_base() { return _narrow_oop._base; }
359 static bool is_narrow_oop_base(void* addr) { return (narrow_oop_base() == (address)addr); }
360 static int narrow_oop_shift() { return _narrow_oop._shift; }
361 static void set_narrow_oop_base(address base) { _narrow_oop._base = base; }
362 static void set_narrow_oop_shift(int shift) { _narrow_oop._shift = shift; }
363 static bool narrow_oop_use_implicit_null_checks() { return _narrow_oop._use_implicit_null_checks; }
364 static void set_narrow_oop_use_implicit_null_checks(bool use) { _narrow_oop._use_implicit_null_checks = use; }
365 // Narrow Oop encoding mode: 249 // Narrow Oop encoding mode:
366 // 0 - Use 32-bits oops without encoding when 250 // 0 - Use 32-bits oops without encoding when
367 // NarrowOopHeapBaseMin + heap_size < 4Gb 251 // NarrowOopHeapBaseMin + heap_size < 4Gb
368 // 1 - Use zero based compressed oops with encoding when 252 // 1 - Use zero based compressed oops with encoding when
369 // NarrowOopHeapBaseMin + heap_size < 32Gb 253 // NarrowOopHeapBaseMin + heap_size < 32Gb
371 enum NARROW_OOP_MODE { 255 enum NARROW_OOP_MODE {
372 UnscaledNarrowOop = 0, 256 UnscaledNarrowOop = 0,
373 ZeroBasedNarrowOop = 1, 257 ZeroBasedNarrowOop = 1,
374 HeapBasedNarrowOop = 2 258 HeapBasedNarrowOop = 2
375 }; 259 };
376 static char* preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode); 260 static char* preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode);
261 static void set_narrow_oop_base(address base) { _narrow_oop._base = base; }
262 static void set_narrow_oop_use_implicit_null_checks(bool use) { _narrow_oop._use_implicit_null_checks = use; }
263
264 // Debugging
265 static int _verify_count; // number of verifies done
266 // True during call to verify(). Should only be set/cleared in verify().
267 static bool _verify_in_progress;
268
269 static void compute_verify_oop_data();
270
271 public:
272 // Known classes in the VM
273 static Klass* boolArrayKlassObj() { return _boolArrayKlassObj; }
274 static Klass* byteArrayKlassObj() { return _byteArrayKlassObj; }
275 static Klass* charArrayKlassObj() { return _charArrayKlassObj; }
276 static Klass* intArrayKlassObj() { return _intArrayKlassObj; }
277 static Klass* shortArrayKlassObj() { return _shortArrayKlassObj; }
278 static Klass* longArrayKlassObj() { return _longArrayKlassObj; }
279 static Klass* singleArrayKlassObj() { return _singleArrayKlassObj; }
280 static Klass* doubleArrayKlassObj() { return _doubleArrayKlassObj; }
281
282 static Klass* objectArrayKlassObj() {
283 return _objectArrayKlassObj;
284 }
285
286 static Klass* typeArrayKlassObj(BasicType t) {
287 assert((uint)t < T_VOID+1, err_msg("range check for type: %s", type2name(t)));
288 assert(_typeArrayKlassObjs[t] != NULL, "domain check");
289 return _typeArrayKlassObjs[t];
290 }
291
292 // Known objects in the VM
293 static oop int_mirror() { return check_mirror(_int_mirror); }
294 static oop float_mirror() { return check_mirror(_float_mirror); }
295 static oop double_mirror() { return check_mirror(_double_mirror); }
296 static oop byte_mirror() { return check_mirror(_byte_mirror); }
297 static oop bool_mirror() { return check_mirror(_bool_mirror); }
298 static oop char_mirror() { return check_mirror(_char_mirror); }
299 static oop long_mirror() { return check_mirror(_long_mirror); }
300 static oop short_mirror() { return check_mirror(_short_mirror); }
301 static oop void_mirror() { return check_mirror(_void_mirror); }
302
303 // table of same
304 static oop _mirrors[T_VOID+1];
305
306 static oop java_mirror(BasicType t) {
307 assert((uint)t < T_VOID+1, "range check");
308 return check_mirror(_mirrors[t]);
309 }
310 static oop main_thread_group() { return _main_thread_group; }
311 static void set_main_thread_group(oop group) { _main_thread_group = group;}
312
313 static oop system_thread_group() { return _system_thread_group; }
314 static void set_system_thread_group(oop group) { _system_thread_group = group;}
315
316 static objArrayOop the_empty_class_klass_array () { return _the_empty_class_klass_array; }
317 static Array<Klass*>* the_array_interfaces_array() { return _the_array_interfaces_array; }
318 static oop the_null_string() { return _the_null_string; }
319 static oop the_min_jint_string() { return _the_min_jint_string; }
320 static Method* finalizer_register_method() { return _finalizer_register_cache->get_Method(); }
321 static ActiveMethodOopsCache* reflect_invoke_cache() { return _reflect_invoke_cache; }
322 static oop null_ptr_exception_instance() { return _null_ptr_exception_instance; }
323 static oop arithmetic_exception_instance() { return _arithmetic_exception_instance; }
324 static oop virtual_machine_error_instance() { return _virtual_machine_error_instance; }
325 static oop vm_exception() { return _vm_exception; }
326
327 static Array<int>* the_empty_int_array() { return _the_empty_int_array; }
328 static Array<u2>* the_empty_short_array() { return _the_empty_short_array; }
329 static Array<Method*>* the_empty_method_array() { return _the_empty_method_array; }
330 static Array<Klass*>* the_empty_klass_array() { return _the_empty_klass_array; }
331
332 // OutOfMemoryError support. Returns an error with the required message. The returned error
333 // may or may not have a backtrace. If error has a backtrace then the stack trace is already
334 // filled in.
335 static oop out_of_memory_error_java_heap() { return gen_out_of_memory_error(_out_of_memory_error_java_heap); }
336 static oop out_of_memory_error_perm_gen() { return gen_out_of_memory_error(_out_of_memory_error_perm_gen); }
337 static oop out_of_memory_error_array_size() { return gen_out_of_memory_error(_out_of_memory_error_array_size); }
338 static oop out_of_memory_error_gc_overhead_limit() { return gen_out_of_memory_error(_out_of_memory_error_gc_overhead_limit); }
339
340 // Accessors needed for fast allocation
341 static Klass** boolArrayKlassObj_addr() { return &_boolArrayKlassObj; }
342 static Klass** byteArrayKlassObj_addr() { return &_byteArrayKlassObj; }
343 static Klass** charArrayKlassObj_addr() { return &_charArrayKlassObj; }
344 static Klass** intArrayKlassObj_addr() { return &_intArrayKlassObj; }
345 static Klass** shortArrayKlassObj_addr() { return &_shortArrayKlassObj; }
346 static Klass** longArrayKlassObj_addr() { return &_longArrayKlassObj; }
347 static Klass** singleArrayKlassObj_addr() { return &_singleArrayKlassObj; }
348 static Klass** doubleArrayKlassObj_addr() { return &_doubleArrayKlassObj; }
349 static Klass** objectArrayKlassObj_addr() { return &_objectArrayKlassObj; }
350
351 // The particular choice of collected heap.
352 static CollectedHeap* heap() { return _collectedHeap; }
353
354 // For UseCompressedOops
355 static address* narrow_oop_base_addr() { return &_narrow_oop._base; }
356 static address narrow_oop_base() { return _narrow_oop._base; }
357 static bool is_narrow_oop_base(void* addr) { return (narrow_oop_base() == (address)addr); }
358 static int narrow_oop_shift() { return _narrow_oop._shift; }
359 static bool narrow_oop_use_implicit_null_checks() { return _narrow_oop._use_implicit_null_checks; }
360
361 // this is set in vm_version on sparc (and then reset in universe afaict)
362 static void set_narrow_oop_shift(int shift) { _narrow_oop._shift = shift; }
363
364 // Reserve Java heap and determine CompressedOops mode
365 static ReservedSpace reserve_heap(size_t heap_size, size_t alignment);
377 366
378 // Historic gc information 367 // Historic gc information
379 static size_t get_heap_capacity_at_last_gc() { return _heap_capacity_at_last_gc; } 368 static size_t get_heap_capacity_at_last_gc() { return _heap_capacity_at_last_gc; }
380 static size_t get_heap_free_at_last_gc() { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; } 369 static size_t get_heap_free_at_last_gc() { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; }
381 static size_t get_heap_used_at_last_gc() { return _heap_used_at_last_gc; } 370 static size_t get_heap_used_at_last_gc() { return _heap_used_at_last_gc; }
398 387
399 // Apply "f" to the addresses of all the direct heap pointers maintained 388 // Apply "f" to the addresses of all the direct heap pointers maintained
400 // as static fields of "Universe". 389 // as static fields of "Universe".
401 static void oops_do(OopClosure* f, bool do_all = false); 390 static void oops_do(OopClosure* f, bool do_all = false);
402 391
392 // CDS support
393 static void serialize(SerializeClosure* f, bool do_all = false);
394
403 // Apply "f" to all klasses for basic types (classes not present in 395 // Apply "f" to all klasses for basic types (classes not present in
404 // SystemDictionary). 396 // SystemDictionary).
405 static void basic_type_classes_do(void f(klassOop)); 397 static void basic_type_classes_do(void f(Klass*));
406
407 // Apply "f" to all system klasses (classes not present in SystemDictionary).
408 static void system_classes_do(void f(klassOop));
409 398
410 // For sharing -- fill in a list of known vtable pointers. 399 // For sharing -- fill in a list of known vtable pointers.
411 static void init_self_patching_vtbl_list(void** list, int count); 400 static void init_self_patching_vtbl_list(void** list, int count);
412 401
413 // Debugging 402 // Debugging
436 // Oop verification (see MacroAssembler::verify_oop) 425 // Oop verification (see MacroAssembler::verify_oop)
437 static uintptr_t verify_oop_mask() PRODUCT_RETURN0; 426 static uintptr_t verify_oop_mask() PRODUCT_RETURN0;
438 static uintptr_t verify_oop_bits() PRODUCT_RETURN0; 427 static uintptr_t verify_oop_bits() PRODUCT_RETURN0;
439 static uintptr_t verify_mark_bits() PRODUCT_RETURN0; 428 static uintptr_t verify_mark_bits() PRODUCT_RETURN0;
440 static uintptr_t verify_mark_mask() PRODUCT_RETURN0; 429 static uintptr_t verify_mark_mask() PRODUCT_RETURN0;
441 static uintptr_t verify_klass_mask() PRODUCT_RETURN0;
442 static uintptr_t verify_klass_bits() PRODUCT_RETURN0;
443 430
444 // Flushing and deoptimization 431 // Flushing and deoptimization
445 static void flush_dependents_on(instanceKlassHandle dependee); 432 static void flush_dependents_on(instanceKlassHandle dependee);
446 static void flush_dependents_on(Handle call_site, Handle method_handle); 433 static void flush_dependents_on(Handle call_site, Handle method_handle);
447 #ifdef HOTSWAP 434 #ifdef HOTSWAP