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src/share/vm/memory/universe.hpp@bd441136a5ce (annotated)

src/share/vm/memory/universe.hpp

Thu, 19 Mar 2009 09:13:24 -0700

author

kvn

date

Thu, 19 Mar 2009 09:13:24 -0700

changeset 1082

bd441136a5ce

parent 1014

0fbdb4381b99

parent 1077

660978a2a31a

child 1280

df6caf649ff7

child 1293

5314d85ffd54

permissions

-rw-r--r--

Merge

duke@435	1	/*
xdono@1014	2	* Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// Universe is a name space holding known system classes and objects in the VM.
duke@435	26	//
duke@435	27	// Loaded classes are accessible through the SystemDictionary.
duke@435	28	//
duke@435	29	// The object heap is allocated and accessed through Universe, and various allocation
duke@435	30	// support is provided. Allocation by the interpreter and compiled code is done inline
duke@435	31	// and bails out to Scavenge::invoke_and_allocate.
duke@435	32
duke@435	33	class CollectedHeap;
duke@435	34	class DeferredObjAllocEvent;
duke@435	35
duke@435	36
duke@435	37	// Common parts of a methodOop cache. This cache safely interacts with
duke@435	38	// the RedefineClasses API.
duke@435	39	//
duke@435	40	class CommonMethodOopCache : public CHeapObj {
duke@435	41	// We save the klassOop and the idnum of methodOop in order to get
duke@435	42	// the current cached methodOop.
duke@435	43	private:
duke@435	44	klassOop _klass;
duke@435	45	int _method_idnum;
duke@435	46
duke@435	47	public:
duke@435	48	CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; }
duke@435	49	~CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; }
duke@435	50
duke@435	51	void init(klassOop k, methodOop m, TRAPS);
duke@435	52	klassOop klass() const { return _klass; }
duke@435	53	int method_idnum() const { return _method_idnum; }
duke@435	54
duke@435	55	// GC support
duke@435	56	void oops_do(OopClosure* f) { f->do_oop((oop*)&_klass); }
duke@435	57	};
duke@435	58
duke@435	59
duke@435	60	// A helper class for caching a methodOop when the user of the cache
duke@435	61	// cares about all versions of the methodOop.
duke@435	62	//
duke@435	63	class ActiveMethodOopsCache : public CommonMethodOopCache {
duke@435	64	// This subclass adds weak references to older versions of the
duke@435	65	// methodOop and a query method for a methodOop.
duke@435	66
duke@435	67	private:
duke@435	68	// If the cached methodOop has not been redefined, then
duke@435	69	// _prev_methods will be NULL. If all of the previous
duke@435	70	// versions of the method have been collected, then
duke@435	71	// _prev_methods can have a length of zero.
duke@435	72	GrowableArray<jweak>* _prev_methods;
duke@435	73
duke@435	74	public:
duke@435	75	ActiveMethodOopsCache() { _prev_methods = NULL; }
duke@435	76	~ActiveMethodOopsCache();
duke@435	77
duke@435	78	void add_previous_version(const methodOop method);
duke@435	79	bool is_same_method(const methodOop method) const;
duke@435	80	};
duke@435	81
duke@435	82
duke@435	83	// A helper class for caching a methodOop when the user of the cache
duke@435	84	// only cares about the latest version of the methodOop.
duke@435	85	//
duke@435	86	class LatestMethodOopCache : public CommonMethodOopCache {
duke@435	87	// This subclass adds a getter method for the latest methodOop.
duke@435	88
duke@435	89	public:
duke@435	90	methodOop get_methodOop();
duke@435	91	};
duke@435	92
kvn@1077	93	// For UseCompressedOops.
kvn@1077	94	struct NarrowOopStruct {
kvn@1077	95	// Base address for oop-within-java-object materialization.
kvn@1077	96	// NULL if using wide oops or zero based narrow oops.
kvn@1077	97	address _base;
kvn@1077	98	// Number of shift bits for encoding/decoding narrow oops.
kvn@1077	99	// 0 if using wide oops or zero based unscaled narrow oops,
kvn@1077	100	// LogMinObjAlignmentInBytes otherwise.
kvn@1077	101	int _shift;
kvn@1077	102	// Generate code with implicit null checks for narrow oops.
kvn@1077	103	bool _use_implicit_null_checks;
kvn@1077	104	};
kvn@1077	105
duke@435	106
duke@435	107	class Universe: AllStatic {
jcoomes@916	108	// Ugh. Universe is much too friendly.
duke@435	109	friend class MarkSweep;
duke@435	110	friend class oopDesc;
duke@435	111	friend class ClassLoader;
duke@435	112	friend class Arguments;
duke@435	113	friend class SystemDictionary;
duke@435	114	friend class VMStructs;
duke@435	115	friend class CompactingPermGenGen;
duke@435	116	friend class VM_PopulateDumpSharedSpace;
duke@435	117
duke@435	118	friend jint universe_init();
duke@435	119	friend void universe2_init();
duke@435	120	friend bool universe_post_init();
duke@435	121
duke@435	122	private:
duke@435	123	// Known classes in the VM
duke@435	124	static klassOop _boolArrayKlassObj;
duke@435	125	static klassOop _byteArrayKlassObj;
duke@435	126	static klassOop _charArrayKlassObj;
duke@435	127	static klassOop _intArrayKlassObj;
duke@435	128	static klassOop _shortArrayKlassObj;
duke@435	129	static klassOop _longArrayKlassObj;
duke@435	130	static klassOop _singleArrayKlassObj;
duke@435	131	static klassOop _doubleArrayKlassObj;
duke@435	132	static klassOop _typeArrayKlassObjs[T_VOID+1];
duke@435	133
duke@435	134	static klassOop _objectArrayKlassObj;
duke@435	135
duke@435	136	static klassOop _symbolKlassObj;
duke@435	137	static klassOop _methodKlassObj;
duke@435	138	static klassOop _constMethodKlassObj;
duke@435	139	static klassOop _methodDataKlassObj;
duke@435	140	static klassOop _klassKlassObj;
duke@435	141	static klassOop _arrayKlassKlassObj;
duke@435	142	static klassOop _objArrayKlassKlassObj;
duke@435	143	static klassOop _typeArrayKlassKlassObj;
duke@435	144	static klassOop _instanceKlassKlassObj;
duke@435	145	static klassOop _constantPoolKlassObj;
duke@435	146	static klassOop _constantPoolCacheKlassObj;
duke@435	147	static klassOop _compiledICHolderKlassObj;
duke@435	148	static klassOop _systemObjArrayKlassObj;
duke@435	149
duke@435	150	// Known objects in the VM
duke@435	151
duke@435	152	// Primitive objects
duke@435	153	static oop _int_mirror;
duke@435	154	static oop _float_mirror;
duke@435	155	static oop _double_mirror;
duke@435	156	static oop _byte_mirror;
duke@435	157	static oop _bool_mirror;
duke@435	158	static oop _char_mirror;
duke@435	159	static oop _long_mirror;
duke@435	160	static oop _short_mirror;
duke@435	161	static oop _void_mirror;
duke@435	162
duke@435	163	static oop _main_thread_group; // Reference to the main thread group object
duke@435	164	static oop _system_thread_group; // Reference to the system thread group object
duke@435	165
duke@435	166	static typeArrayOop _the_empty_byte_array; // Canonicalized byte array
duke@435	167	static typeArrayOop _the_empty_short_array; // Canonicalized short array
duke@435	168	static typeArrayOop _the_empty_int_array; // Canonicalized int array
duke@435	169	static objArrayOop _the_empty_system_obj_array; // Canonicalized system obj array
duke@435	170	static objArrayOop _the_empty_class_klass_array; // Canonicalized obj array of type java.lang.Class
duke@435	171	static objArrayOop _the_array_interfaces_array; // Canonicalized 2-array of cloneable & serializable klasses
duke@435	172	static LatestMethodOopCache* _finalizer_register_cache; // static method for registering finalizable objects
duke@435	173	static LatestMethodOopCache* _loader_addClass_cache; // method for registering loaded classes in class loader vector
duke@435	174	static ActiveMethodOopsCache* _reflect_invoke_cache; // method for security checks
duke@435	175	static oop _out_of_memory_error_java_heap; // preallocated error object (no backtrace)
duke@435	176	static oop _out_of_memory_error_perm_gen; // preallocated error object (no backtrace)
duke@435	177	static oop _out_of_memory_error_array_size;// preallocated error object (no backtrace)
duke@435	178	static oop _out_of_memory_error_gc_overhead_limit; // preallocated error object (no backtrace)
duke@435	179
duke@435	180	// array of preallocated error objects with backtrace
duke@435	181	static objArrayOop _preallocated_out_of_memory_error_array;
duke@435	182
duke@435	183	// number of preallocated error objects available for use
duke@435	184	static volatile jint _preallocated_out_of_memory_error_avail_count;
duke@435	185
duke@435	186	static oop _null_ptr_exception_instance; // preallocated exception object
duke@435	187	static oop _arithmetic_exception_instance; // preallocated exception object
duke@435	188	static oop _virtual_machine_error_instance; // preallocated exception object
duke@435	189	// The object used as an exception dummy when exceptions are thrown for
duke@435	190	// the vm thread.
duke@435	191	static oop _vm_exception;
duke@435	192
duke@435	193	static oop _emptySymbol; // Canonical empty string ("") symbol
duke@435	194
duke@435	195	// The particular choice of collected heap.
duke@435	196	static CollectedHeap* _collectedHeap;
kvn@1077	197
kvn@1077	198	// For UseCompressedOops.
kvn@1077	199	static struct NarrowOopStruct _narrow_oop;
duke@435	200
duke@435	201	// array of dummy objects used with +FullGCAlot
duke@435	202	debug_only(static objArrayOop _fullgc_alot_dummy_array;)
coleenp@548	203	// index of next entry to clear
duke@435	204	debug_only(static int _fullgc_alot_dummy_next;)
duke@435	205
duke@435	206	// Compiler/dispatch support
duke@435	207	static int _base_vtable_size; // Java vtbl size of klass Object (in words)
duke@435	208
duke@435	209	// Initialization
duke@435	210	static bool _bootstrapping; // true during genesis
duke@435	211	static bool _fully_initialized; // true after universe_init and initialize_vtables called
duke@435	212
duke@435	213	// the array of preallocated errors with backtraces
duke@435	214	static objArrayOop preallocated_out_of_memory_errors() { return _preallocated_out_of_memory_error_array; }
duke@435	215
duke@435	216	// generate an out of memory error; if possible using an error with preallocated backtrace;
duke@435	217	// otherwise return the given default error.
duke@435	218	static oop gen_out_of_memory_error(oop default_err);
duke@435	219
duke@435	220	// Historic gc information
duke@435	221	static size_t _heap_capacity_at_last_gc;
duke@435	222	static size_t _heap_used_at_last_gc;
duke@435	223
duke@435	224	static jint initialize_heap();
duke@435	225	static void initialize_basic_type_mirrors(TRAPS);
duke@435	226	static void fixup_mirrors(TRAPS);
duke@435	227
duke@435	228	static void reinitialize_vtable_of(KlassHandle h_k, TRAPS);
duke@435	229	static void reinitialize_itables(TRAPS);
duke@435	230	static void compute_base_vtable_size(); // compute vtable size of class Object
duke@435	231
duke@435	232	static void genesis(TRAPS); // Create the initial world
duke@435	233
duke@435	234	// Mirrors for primitive classes (created eagerly)
duke@435	235	static oop check_mirror(oop m) {
duke@435	236	assert(m != NULL, "mirror not initialized");
duke@435	237	return m;
duke@435	238	}
duke@435	239
duke@435	240	// Debugging
duke@435	241	static int _verify_count; // number of verifies done
duke@435	242	// True during call to verify(). Should only be set/cleared in verify().
duke@435	243	static bool _verify_in_progress;
duke@435	244
duke@435	245	static void compute_verify_oop_data();
duke@435	246
duke@435	247	public:
duke@435	248	// Known classes in the VM
duke@435	249	static klassOop boolArrayKlassObj() { return _boolArrayKlassObj; }
duke@435	250	static klassOop byteArrayKlassObj() { return _byteArrayKlassObj; }
duke@435	251	static klassOop charArrayKlassObj() { return _charArrayKlassObj; }
duke@435	252	static klassOop intArrayKlassObj() { return _intArrayKlassObj; }
duke@435	253	static klassOop shortArrayKlassObj() { return _shortArrayKlassObj; }
duke@435	254	static klassOop longArrayKlassObj() { return _longArrayKlassObj; }
duke@435	255	static klassOop singleArrayKlassObj() { return _singleArrayKlassObj; }
duke@435	256	static klassOop doubleArrayKlassObj() { return _doubleArrayKlassObj; }
duke@435	257
duke@435	258	static klassOop objectArrayKlassObj() {
duke@435	259	return _objectArrayKlassObj;
duke@435	260	}
duke@435	261
duke@435	262	static klassOop typeArrayKlassObj(BasicType t) {
duke@435	263	assert((uint)t < T_VOID+1, "range check");
duke@435	264	assert(_typeArrayKlassObjs[t] != NULL, "domain check");
duke@435	265	return _typeArrayKlassObjs[t];
duke@435	266	}
duke@435	267
duke@435	268	static klassOop symbolKlassObj() { return _symbolKlassObj; }
duke@435	269	static klassOop methodKlassObj() { return _methodKlassObj; }
duke@435	270	static klassOop constMethodKlassObj() { return _constMethodKlassObj; }
duke@435	271	static klassOop methodDataKlassObj() { return _methodDataKlassObj; }
duke@435	272	static klassOop klassKlassObj() { return _klassKlassObj; }
duke@435	273	static klassOop arrayKlassKlassObj() { return _arrayKlassKlassObj; }
duke@435	274	static klassOop objArrayKlassKlassObj() { return _objArrayKlassKlassObj; }
duke@435	275	static klassOop typeArrayKlassKlassObj() { return _typeArrayKlassKlassObj; }
duke@435	276	static klassOop instanceKlassKlassObj() { return _instanceKlassKlassObj; }
duke@435	277	static klassOop constantPoolKlassObj() { return _constantPoolKlassObj; }
duke@435	278	static klassOop constantPoolCacheKlassObj() { return _constantPoolCacheKlassObj; }
duke@435	279	static klassOop compiledICHolderKlassObj() { return _compiledICHolderKlassObj; }
duke@435	280	static klassOop systemObjArrayKlassObj() { return _systemObjArrayKlassObj; }
duke@435	281
duke@435	282	// Known objects in tbe VM
duke@435	283	static oop int_mirror() { return check_mirror(_int_mirror);
duke@435	284	}
duke@435	285	static oop float_mirror() { return check_mirror(_float_mirror); }
duke@435	286	static oop double_mirror() { return check_mirror(_double_mirror); }
duke@435	287	static oop byte_mirror() { return check_mirror(_byte_mirror); }
duke@435	288	static oop bool_mirror() { return check_mirror(_bool_mirror); }
duke@435	289	static oop char_mirror() { return check_mirror(_char_mirror); }
duke@435	290	static oop long_mirror() { return check_mirror(_long_mirror); }
duke@435	291	static oop short_mirror() { return check_mirror(_short_mirror); }
duke@435	292	static oop void_mirror() { return check_mirror(_void_mirror); }
duke@435	293
duke@435	294	// table of same
duke@435	295	static oop _mirrors[T_VOID+1];
duke@435	296
duke@435	297	static oop java_mirror(BasicType t) {
duke@435	298	assert((uint)t < T_VOID+1, "range check");
duke@435	299	return check_mirror(_mirrors[t]);
duke@435	300	}
duke@435	301	static oop main_thread_group() { return _main_thread_group; }
duke@435	302	static void set_main_thread_group(oop group) { _main_thread_group = group;}
duke@435	303
duke@435	304	static oop system_thread_group() { return _system_thread_group; }
duke@435	305	static void set_system_thread_group(oop group) { _system_thread_group = group;}
duke@435	306
duke@435	307	static typeArrayOop the_empty_byte_array() { return _the_empty_byte_array; }
duke@435	308	static typeArrayOop the_empty_short_array() { return _the_empty_short_array; }
duke@435	309	static typeArrayOop the_empty_int_array() { return _the_empty_int_array; }
duke@435	310	static objArrayOop the_empty_system_obj_array () { return _the_empty_system_obj_array; }
duke@435	311	static objArrayOop the_empty_class_klass_array () { return _the_empty_class_klass_array; }
duke@435	312	static objArrayOop the_array_interfaces_array() { return _the_array_interfaces_array; }
duke@435	313	static methodOop finalizer_register_method() { return _finalizer_register_cache->get_methodOop(); }
duke@435	314	static methodOop loader_addClass_method() { return _loader_addClass_cache->get_methodOop(); }
duke@435	315	static ActiveMethodOopsCache* reflect_invoke_cache() { return _reflect_invoke_cache; }
duke@435	316	static oop null_ptr_exception_instance() { return _null_ptr_exception_instance; }
duke@435	317	static oop arithmetic_exception_instance() { return _arithmetic_exception_instance; }
duke@435	318	static oop virtual_machine_error_instance() { return _virtual_machine_error_instance; }
duke@435	319	static oop vm_exception() { return _vm_exception; }
duke@435	320	static oop emptySymbol() { return _emptySymbol; }
duke@435	321
duke@435	322	// OutOfMemoryError support. Returns an error with the required message. The returned error
duke@435	323	// may or may not have a backtrace. If error has a backtrace then the stack trace is already
duke@435	324	// filled in.
duke@435	325	static oop out_of_memory_error_java_heap() { return gen_out_of_memory_error(_out_of_memory_error_java_heap); }
duke@435	326	static oop out_of_memory_error_perm_gen() { return gen_out_of_memory_error(_out_of_memory_error_perm_gen); }
duke@435	327	static oop out_of_memory_error_array_size() { return gen_out_of_memory_error(_out_of_memory_error_array_size); }
duke@435	328	static oop out_of_memory_error_gc_overhead_limit() { return gen_out_of_memory_error(_out_of_memory_error_gc_overhead_limit); }
duke@435	329
duke@435	330	// Accessors needed for fast allocation
duke@435	331	static klassOop* boolArrayKlassObj_addr() { return &_boolArrayKlassObj; }
duke@435	332	static klassOop* byteArrayKlassObj_addr() { return &_byteArrayKlassObj; }
duke@435	333	static klassOop* charArrayKlassObj_addr() { return &_charArrayKlassObj; }
duke@435	334	static klassOop* intArrayKlassObj_addr() { return &_intArrayKlassObj; }
duke@435	335	static klassOop* shortArrayKlassObj_addr() { return &_shortArrayKlassObj; }
duke@435	336	static klassOop* longArrayKlassObj_addr() { return &_longArrayKlassObj; }
duke@435	337	static klassOop* singleArrayKlassObj_addr() { return &_singleArrayKlassObj; }
duke@435	338	static klassOop* doubleArrayKlassObj_addr() { return &_doubleArrayKlassObj; }
duke@435	339
duke@435	340	// The particular choice of collected heap.
duke@435	341	static CollectedHeap* heap() { return _collectedHeap; }
duke@435	342
coleenp@548	343	// For UseCompressedOops
kvn@1077	344	static address* narrow_oop_base_addr() { return &_narrow_oop._base; }
kvn@1077	345	static address narrow_oop_base() { return _narrow_oop._base; }
kvn@1077	346	static int narrow_oop_shift() { return _narrow_oop._shift; }
kvn@1077	347	static void set_narrow_oop_base(address base) { _narrow_oop._base = base; }
kvn@1077	348	static void set_narrow_oop_shift(int shift) { _narrow_oop._shift = shift; }
kvn@1077	349	static bool narrow_oop_use_implicit_null_checks() { return _narrow_oop._use_implicit_null_checks; }
kvn@1077	350	static void set_narrow_oop_use_implicit_null_checks(bool use) { _narrow_oop._use_implicit_null_checks = use; }
kvn@1077	351	// Narrow Oop encoding mode:
kvn@1077	352	// 0 - Use 32-bits oops without encoding when
kvn@1077	353	// NarrowOopHeapBaseMin + heap_size < 4Gb
kvn@1077	354	// 1 - Use zero based compressed oops with encoding when
kvn@1077	355	// NarrowOopHeapBaseMin + heap_size < 32Gb
kvn@1077	356	// 2 - Use compressed oops with heap base + encoding.
kvn@1077	357	enum NARROW_OOP_MODE {
kvn@1077	358	UnscaledNarrowOop = 0,
kvn@1077	359	ZeroBasedNarrowOop = 1,
kvn@1077	360	HeapBasedNarrowOop = 2
kvn@1077	361	};
kvn@1077	362	static char* preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode);
coleenp@548	363
duke@435	364	// Historic gc information
duke@435	365	static size_t get_heap_capacity_at_last_gc() { return _heap_capacity_at_last_gc; }
duke@435	366	static size_t get_heap_free_at_last_gc() { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; }
duke@435	367	static size_t get_heap_used_at_last_gc() { return _heap_used_at_last_gc; }
duke@435	368	static void update_heap_info_at_gc();
duke@435	369
duke@435	370	// Testers
duke@435	371	static bool is_bootstrapping() { return _bootstrapping; }
duke@435	372	static bool is_fully_initialized() { return _fully_initialized; }
duke@435	373
duke@435	374	static inline bool element_type_should_be_aligned(BasicType type);
duke@435	375	static inline bool field_type_should_be_aligned(BasicType type);
duke@435	376	static bool on_page_boundary(void* addr);
duke@435	377	static bool should_fill_in_stack_trace(Handle throwable);
duke@435	378	static void check_alignment(uintx size, uintx alignment, const char* name);
duke@435	379
duke@435	380	// Finalizer support.
duke@435	381	static void run_finalizers_on_exit();
duke@435	382
duke@435	383	// Iteration
duke@435	384
duke@435	385	// Apply "f" to the addresses of all the direct heap pointers maintained
duke@435	386	// as static fields of "Universe".
duke@435	387	static void oops_do(OopClosure* f, bool do_all = false);
duke@435	388
duke@435	389	// Apply "f" to all klasses for basic types (classes not present in
duke@435	390	// SystemDictionary).
duke@435	391	static void basic_type_classes_do(void f(klassOop));
duke@435	392
duke@435	393	// Apply "f" to all system klasses (classes not present in SystemDictionary).
duke@435	394	static void system_classes_do(void f(klassOop));
duke@435	395
duke@435	396	// For sharing -- fill in a list of known vtable pointers.
duke@435	397	static void init_self_patching_vtbl_list(void** list, int count);
duke@435	398
duke@435	399	// Debugging
duke@435	400	static bool verify_in_progress() { return _verify_in_progress; }
duke@435	401	static void verify(bool allow_dirty = true, bool silent = false);
duke@435	402	static int verify_count() { return _verify_count; }
duke@435	403	static void print();
duke@435	404	static void print_on(outputStream* st);
duke@435	405	static void print_heap_at_SIGBREAK();
duke@435	406	static void print_heap_before_gc() { print_heap_before_gc(gclog_or_tty); }
duke@435	407	static void print_heap_after_gc() { print_heap_after_gc(gclog_or_tty); }
duke@435	408	static void print_heap_before_gc(outputStream* st);
duke@435	409	static void print_heap_after_gc(outputStream* st);
duke@435	410
duke@435	411	// Change the number of dummy objects kept reachable by the full gc dummy
duke@435	412	// array; this should trigger relocation in a sliding compaction collector.
duke@435	413	debug_only(static bool release_fullgc_alot_dummy();)
duke@435	414	// The non-oop pattern (see compiledIC.hpp, etc)
duke@435	415	static void* non_oop_word();
duke@435	416
duke@435	417	// Oop verification (see MacroAssembler::verify_oop)
duke@435	418	static uintptr_t verify_oop_mask() PRODUCT_RETURN0;
duke@435	419	static uintptr_t verify_oop_bits() PRODUCT_RETURN0;
duke@435	420	static uintptr_t verify_mark_bits() PRODUCT_RETURN0;
duke@435	421	static uintptr_t verify_mark_mask() PRODUCT_RETURN0;
duke@435	422	static uintptr_t verify_klass_mask() PRODUCT_RETURN0;
duke@435	423	static uintptr_t verify_klass_bits() PRODUCT_RETURN0;
duke@435	424
duke@435	425	// Flushing and deoptimization
duke@435	426	static void flush_dependents_on(instanceKlassHandle dependee);
duke@435	427	#ifdef HOTSWAP
duke@435	428	// Flushing and deoptimization in case of evolution
duke@435	429	static void flush_evol_dependents_on(instanceKlassHandle dependee);
duke@435	430	#endif // HOTSWAP
duke@435	431	// Support for fullspeed debugging
duke@435	432	static void flush_dependents_on_method(methodHandle dependee);
duke@435	433
duke@435	434	// Compiler support
duke@435	435	static int base_vtable_size() { return _base_vtable_size; }
duke@435	436	};
duke@435	437
duke@435	438	class DeferredObjAllocEvent : public CHeapObj {
duke@435	439	private:
duke@435	440	oop _oop;
duke@435	441	size_t _bytesize;
duke@435	442	jint _arena_id;
duke@435	443
duke@435	444	public:
duke@435	445	DeferredObjAllocEvent(const oop o, const size_t s, const jint id) {
duke@435	446	_oop = o;
duke@435	447	_bytesize = s;
duke@435	448	_arena_id = id;
duke@435	449	}
duke@435	450
duke@435	451	~DeferredObjAllocEvent() {
duke@435	452	}
duke@435	453
duke@435	454	jint arena_id() { return _arena_id; }
duke@435	455	size_t bytesize() { return _bytesize; }
duke@435	456	oop get_oop() { return _oop; }
duke@435	457	};