Wed, 01 May 2013 08:07:59 -0700
8013418: assert(i == total_args_passed) in AdapterHandlerLibrary::get_adapter since 8-b87
Summary: Do not treat static methods as miranda methods.
Reviewed-by: dholmes, acorn
1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_OOPS_OOP_HPP
26 #define SHARE_VM_OOPS_OOP_HPP
28 #include "memory/iterator.hpp"
29 #include "memory/memRegion.hpp"
30 #include "memory/specialized_oop_closures.hpp"
31 #include "oops/metadata.hpp"
32 #include "utilities/macros.hpp"
33 #include "utilities/top.hpp"
35 // oopDesc is the top baseclass for objects classes. The {name}Desc classes describe
36 // the format of Java objects so the fields can be accessed from C++.
37 // oopDesc is abstract.
38 // (see oopHierarchy for complete oop class hierarchy)
39 //
40 // no virtual functions allowed
42 // store into oop with store check
43 template <class T> void oop_store(T* p, oop v);
44 template <class T> void oop_store(volatile T* p, oop v);
46 extern bool always_do_update_barrier;
48 // Forward declarations.
49 class OopClosure;
50 class ScanClosure;
51 class FastScanClosure;
52 class FilteringClosure;
53 class BarrierSet;
54 class CMSIsAliveClosure;
56 class PSPromotionManager;
57 class ParCompactionManager;
59 class oopDesc {
60 friend class VMStructs;
61 private:
62 volatile markOop _mark;
63 union _metadata {
64 Klass* _klass;
65 narrowOop _compressed_klass;
66 } _metadata;
68 // Fast access to barrier set. Must be initialized.
69 static BarrierSet* _bs;
71 public:
72 markOop mark() const { return _mark; }
73 markOop* mark_addr() const { return (markOop*) &_mark; }
75 void set_mark(volatile markOop m) { _mark = m; }
77 void release_set_mark(markOop m);
78 markOop cas_set_mark(markOop new_mark, markOop old_mark);
80 // Used only to re-initialize the mark word (e.g., of promoted
81 // objects during a GC) -- requires a valid klass pointer
82 void init_mark();
84 Klass* klass() const;
85 Klass* klass_or_null() const volatile;
86 Klass** klass_addr();
87 narrowOop* compressed_klass_addr();
89 void set_klass(Klass* k);
91 // For klass field compression
92 int klass_gap() const;
93 void set_klass_gap(int z);
94 // For when the klass pointer is being used as a linked list "next" field.
95 void set_klass_to_list_ptr(oop k);
96 oop list_ptr_from_klass();
98 // size of object header, aligned to platform wordSize
99 static int header_size() { return sizeof(oopDesc)/HeapWordSize; }
101 // Returns whether this is an instance of k or an instance of a subclass of k
102 bool is_a(Klass* k) const;
104 // Returns the actual oop size of the object
105 int size();
107 // Sometimes (for complicated concurrency-related reasons), it is useful
108 // to be able to figure out the size of an object knowing its klass.
109 int size_given_klass(Klass* klass);
111 // type test operations (inlined in oop.inline.h)
112 bool is_instance() const;
113 bool is_instanceMirror() const;
114 bool is_instanceRef() const;
115 bool is_array() const;
116 bool is_objArray() const;
117 bool is_typeArray() const;
119 private:
120 // field addresses in oop
121 void* field_base(int offset) const;
123 jbyte* byte_field_addr(int offset) const;
124 jchar* char_field_addr(int offset) const;
125 jboolean* bool_field_addr(int offset) const;
126 jint* int_field_addr(int offset) const;
127 jshort* short_field_addr(int offset) const;
128 jlong* long_field_addr(int offset) const;
129 jfloat* float_field_addr(int offset) const;
130 jdouble* double_field_addr(int offset) const;
131 Metadata** metadata_field_addr(int offset) const;
133 public:
134 // Need this as public for garbage collection.
135 template <class T> T* obj_field_addr(int offset) const;
137 // Needed for javaClasses
138 address* address_field_addr(int offset) const;
140 static bool is_null(oop obj);
141 static bool is_null(narrowOop obj);
142 static bool is_null(Klass* obj);
144 // Decode an oop pointer from a narrowOop if compressed.
145 // These are overloaded for oop and narrowOop as are the other functions
146 // below so that they can be called in template functions.
147 static oop decode_heap_oop_not_null(oop v);
148 static oop decode_heap_oop_not_null(narrowOop v);
149 static oop decode_heap_oop(oop v);
150 static oop decode_heap_oop(narrowOop v);
152 // Encode an oop pointer to a narrow oop. The or_null versions accept
153 // null oop pointer, others do not in order to eliminate the
154 // null checking branches.
155 static narrowOop encode_heap_oop_not_null(oop v);
156 static narrowOop encode_heap_oop(oop v);
158 // Load an oop out of the Java heap
159 static narrowOop load_heap_oop(narrowOop* p);
160 static oop load_heap_oop(oop* p);
162 // Load an oop out of Java heap and decode it to an uncompressed oop.
163 static oop load_decode_heap_oop_not_null(narrowOop* p);
164 static oop load_decode_heap_oop_not_null(oop* p);
165 static oop load_decode_heap_oop(narrowOop* p);
166 static oop load_decode_heap_oop(oop* p);
168 // Store an oop into the heap.
169 static void store_heap_oop(narrowOop* p, narrowOop v);
170 static void store_heap_oop(oop* p, oop v);
172 // Encode oop if UseCompressedOops and store into the heap.
173 static void encode_store_heap_oop_not_null(narrowOop* p, oop v);
174 static void encode_store_heap_oop_not_null(oop* p, oop v);
175 static void encode_store_heap_oop(narrowOop* p, oop v);
176 static void encode_store_heap_oop(oop* p, oop v);
178 static void release_store_heap_oop(volatile narrowOop* p, narrowOop v);
179 static void release_store_heap_oop(volatile oop* p, oop v);
181 static void release_encode_store_heap_oop_not_null(volatile narrowOop* p, oop v);
182 static void release_encode_store_heap_oop_not_null(volatile oop* p, oop v);
183 static void release_encode_store_heap_oop(volatile narrowOop* p, oop v);
184 static void release_encode_store_heap_oop(volatile oop* p, oop v);
186 static oop atomic_exchange_oop(oop exchange_value, volatile HeapWord *dest);
187 static oop atomic_compare_exchange_oop(oop exchange_value,
188 volatile HeapWord *dest,
189 oop compare_value,
190 bool prebarrier = false);
192 // klass encoding for klass pointer in objects.
193 static narrowOop encode_klass_not_null(Klass* v);
194 static narrowOop encode_klass(Klass* v);
196 static Klass* decode_klass_not_null(narrowOop v);
197 static Klass* decode_klass(narrowOop v);
199 // Access to fields in a instanceOop through these methods.
200 oop obj_field(int offset) const;
201 volatile oop obj_field_volatile(int offset) const;
202 void obj_field_put(int offset, oop value);
203 void obj_field_put_raw(int offset, oop value);
204 void obj_field_put_volatile(int offset, oop value);
206 Metadata* metadata_field(int offset) const;
207 void metadata_field_put(int offset, Metadata* value);
209 jbyte byte_field(int offset) const;
210 void byte_field_put(int offset, jbyte contents);
212 jchar char_field(int offset) const;
213 void char_field_put(int offset, jchar contents);
215 jboolean bool_field(int offset) const;
216 void bool_field_put(int offset, jboolean contents);
218 jint int_field(int offset) const;
219 void int_field_put(int offset, jint contents);
221 jshort short_field(int offset) const;
222 void short_field_put(int offset, jshort contents);
224 jlong long_field(int offset) const;
225 void long_field_put(int offset, jlong contents);
227 jfloat float_field(int offset) const;
228 void float_field_put(int offset, jfloat contents);
230 jdouble double_field(int offset) const;
231 void double_field_put(int offset, jdouble contents);
233 address address_field(int offset) const;
234 void address_field_put(int offset, address contents);
236 oop obj_field_acquire(int offset) const;
237 void release_obj_field_put(int offset, oop value);
239 jbyte byte_field_acquire(int offset) const;
240 void release_byte_field_put(int offset, jbyte contents);
242 jchar char_field_acquire(int offset) const;
243 void release_char_field_put(int offset, jchar contents);
245 jboolean bool_field_acquire(int offset) const;
246 void release_bool_field_put(int offset, jboolean contents);
248 jint int_field_acquire(int offset) const;
249 void release_int_field_put(int offset, jint contents);
251 jshort short_field_acquire(int offset) const;
252 void release_short_field_put(int offset, jshort contents);
254 jlong long_field_acquire(int offset) const;
255 void release_long_field_put(int offset, jlong contents);
257 jfloat float_field_acquire(int offset) const;
258 void release_float_field_put(int offset, jfloat contents);
260 jdouble double_field_acquire(int offset) const;
261 void release_double_field_put(int offset, jdouble contents);
263 address address_field_acquire(int offset) const;
264 void release_address_field_put(int offset, address contents);
266 // printing functions for VM debugging
267 void print_on(outputStream* st) const; // First level print
268 void print_value_on(outputStream* st) const; // Second level print.
269 void print_address_on(outputStream* st) const; // Address printing
271 // printing on default output stream
272 void print();
273 void print_value();
274 void print_address();
276 // return the print strings
277 char* print_string();
278 char* print_value_string();
280 // verification operations
281 void verify_on(outputStream* st);
282 void verify();
284 // locking operations
285 bool is_locked() const;
286 bool is_unlocked() const;
287 bool has_bias_pattern() const;
289 // asserts
290 bool is_oop(bool ignore_mark_word = false) const;
291 bool is_oop_or_null(bool ignore_mark_word = false) const;
292 #ifndef PRODUCT
293 bool is_unlocked_oop() const;
294 #endif
296 // garbage collection
297 bool is_gc_marked() const;
298 // Apply "MarkSweep::mark_and_push" to (the address of) every non-NULL
299 // reference field in "this".
300 void follow_contents(void);
302 #if INCLUDE_ALL_GCS
303 // Parallel Scavenge
304 void push_contents(PSPromotionManager* pm);
306 // Parallel Old
307 void update_contents(ParCompactionManager* cm);
309 void follow_contents(ParCompactionManager* cm);
310 #endif // INCLUDE_ALL_GCS
312 bool is_scavengable() const;
314 // Forward pointer operations for scavenge
315 bool is_forwarded() const;
317 void forward_to(oop p);
318 bool cas_forward_to(oop p, markOop compare);
320 #if INCLUDE_ALL_GCS
321 // Like "forward_to", but inserts the forwarding pointer atomically.
322 // Exactly one thread succeeds in inserting the forwarding pointer, and
323 // this call returns "NULL" for that thread; any other thread has the
324 // value of the forwarding pointer returned and does not modify "this".
325 oop forward_to_atomic(oop p);
326 #endif // INCLUDE_ALL_GCS
328 oop forwardee() const;
330 // Age of object during scavenge
331 uint age() const;
332 void incr_age();
334 // Adjust all pointers in this object to point at it's forwarded location and
335 // return the size of this oop. This is used by the MarkSweep collector.
336 int adjust_pointers();
338 #if INCLUDE_ALL_GCS
339 // Parallel old
340 void update_header(ParCompactionManager* cm);
341 #endif // INCLUDE_ALL_GCS
343 // mark-sweep support
344 void follow_body(int begin, int end);
346 // Fast access to barrier set
347 static BarrierSet* bs() { return _bs; }
348 static void set_bs(BarrierSet* bs) { _bs = bs; }
350 // iterators, returns size of object
351 #define OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
352 int oop_iterate(OopClosureType* blk); \
353 int oop_iterate(OopClosureType* blk, MemRegion mr); // Only in mr.
355 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_DECL)
356 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_ITERATE_DECL)
358 #if INCLUDE_ALL_GCS
360 #define OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
361 int oop_iterate_backwards(OopClosureType* blk);
363 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_BACKWARDS_DECL)
364 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_ITERATE_BACKWARDS_DECL)
365 #endif
367 int oop_iterate_no_header(OopClosure* bk);
368 int oop_iterate_no_header(OopClosure* bk, MemRegion mr);
370 // identity hash; returns the identity hash key (computes it if necessary)
371 // NOTE with the introduction of UseBiasedLocking that identity_hash() might reach a
372 // safepoint if called on a biased object. Calling code must be aware of that.
373 intptr_t identity_hash();
374 intptr_t slow_identity_hash();
376 // Alternate hashing code if string table is rehashed
377 unsigned int new_hash(jint seed);
379 // marks are forwarded to stack when object is locked
380 bool has_displaced_mark() const;
381 markOop displaced_mark() const;
382 void set_displaced_mark(markOop m);
384 // for code generation
385 static int mark_offset_in_bytes() { return offset_of(oopDesc, _mark); }
386 static int klass_offset_in_bytes() { return offset_of(oopDesc, _metadata._klass); }
387 static int klass_gap_offset_in_bytes();
388 };
390 #endif // SHARE_VM_OOPS_OOP_HPP