Tue, 11 May 2010 14:35:43 -0700
6931180: Migration to recent versions of MS Platform SDK
6951582: Build problems on win64
Summary: Changes to enable building JDK7 with Microsoft Visual Studio 2010
Reviewed-by: ohair, art, ccheung, dcubed
1 /*
2 * Copyright 1999-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_ciInstanceKlass.cpp.incl"
28 // ciInstanceKlass
29 //
30 // This class represents a klassOop in the HotSpot virtual machine
31 // whose Klass part in an instanceKlass.
33 // ------------------------------------------------------------------
34 // ciInstanceKlass::ciInstanceKlass
35 //
36 // Loaded instance klass.
37 ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) :
38 ciKlass(h_k), _non_static_fields(NULL)
39 {
40 assert(get_Klass()->oop_is_instance(), "wrong type");
41 instanceKlass* ik = get_instanceKlass();
43 AccessFlags access_flags = ik->access_flags();
44 _flags = ciFlags(access_flags);
45 _has_finalizer = access_flags.has_finalizer();
46 _has_subklass = ik->subklass() != NULL;
47 _is_initialized = ik->is_initialized();
48 // Next line must follow and use the result of the previous line:
49 _is_linked = _is_initialized || ik->is_linked();
50 _nonstatic_field_size = ik->nonstatic_field_size();
51 _has_nonstatic_fields = ik->has_nonstatic_fields();
52 _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields:
54 _nof_implementors = ik->nof_implementors();
55 for (int i = 0; i < implementors_limit; i++) {
56 _implementors[i] = NULL; // we will fill these lazily
57 }
59 Thread *thread = Thread::current();
60 if (ciObjectFactory::is_initialized()) {
61 _loader = JNIHandles::make_local(thread, ik->class_loader());
62 _protection_domain = JNIHandles::make_local(thread,
63 ik->protection_domain());
64 _is_shared = false;
65 } else {
66 Handle h_loader(thread, ik->class_loader());
67 Handle h_protection_domain(thread, ik->protection_domain());
68 _loader = JNIHandles::make_global(h_loader);
69 _protection_domain = JNIHandles::make_global(h_protection_domain);
70 _is_shared = true;
71 }
73 // Lazy fields get filled in only upon request.
74 _super = NULL;
75 _java_mirror = NULL;
77 if (is_shared()) {
78 if (h_k() != SystemDictionary::Object_klass()) {
79 super();
80 }
81 java_mirror();
82 //compute_nonstatic_fields(); // done outside of constructor
83 }
85 _field_cache = NULL;
86 }
88 // Version for unloaded classes:
89 ciInstanceKlass::ciInstanceKlass(ciSymbol* name,
90 jobject loader, jobject protection_domain)
91 : ciKlass(name, ciInstanceKlassKlass::make())
92 {
93 assert(name->byte_at(0) != '[', "not an instance klass");
94 _is_initialized = false;
95 _is_linked = false;
96 _nonstatic_field_size = -1;
97 _has_nonstatic_fields = false;
98 _nonstatic_fields = NULL;
99 _nof_implementors = -1;
100 _loader = loader;
101 _protection_domain = protection_domain;
102 _is_shared = false;
103 _super = NULL;
104 _java_mirror = NULL;
105 _field_cache = NULL;
106 }
110 // ------------------------------------------------------------------
111 // ciInstanceKlass::compute_shared_is_initialized
112 bool ciInstanceKlass::compute_shared_is_initialized() {
113 GUARDED_VM_ENTRY(
114 instanceKlass* ik = get_instanceKlass();
115 _is_initialized = ik->is_initialized();
116 return _is_initialized;
117 )
118 }
120 // ------------------------------------------------------------------
121 // ciInstanceKlass::compute_shared_is_linked
122 bool ciInstanceKlass::compute_shared_is_linked() {
123 GUARDED_VM_ENTRY(
124 instanceKlass* ik = get_instanceKlass();
125 _is_linked = ik->is_linked();
126 return _is_linked;
127 )
128 }
130 // ------------------------------------------------------------------
131 // ciInstanceKlass::compute_shared_has_subklass
132 bool ciInstanceKlass::compute_shared_has_subklass() {
133 GUARDED_VM_ENTRY(
134 instanceKlass* ik = get_instanceKlass();
135 _has_subklass = ik->subklass() != NULL;
136 return _has_subklass;
137 )
138 }
140 // ------------------------------------------------------------------
141 // ciInstanceKlass::compute_shared_nof_implementors
142 int ciInstanceKlass::compute_shared_nof_implementors() {
143 // We requery this property, since it is a very old ciObject.
144 GUARDED_VM_ENTRY(
145 instanceKlass* ik = get_instanceKlass();
146 _nof_implementors = ik->nof_implementors();
147 return _nof_implementors;
148 )
149 }
151 // ------------------------------------------------------------------
152 // ciInstanceKlass::loader
153 oop ciInstanceKlass::loader() {
154 ASSERT_IN_VM;
155 return JNIHandles::resolve(_loader);
156 }
158 // ------------------------------------------------------------------
159 // ciInstanceKlass::loader_handle
160 jobject ciInstanceKlass::loader_handle() {
161 return _loader;
162 }
164 // ------------------------------------------------------------------
165 // ciInstanceKlass::protection_domain
166 oop ciInstanceKlass::protection_domain() {
167 ASSERT_IN_VM;
168 return JNIHandles::resolve(_protection_domain);
169 }
171 // ------------------------------------------------------------------
172 // ciInstanceKlass::protection_domain_handle
173 jobject ciInstanceKlass::protection_domain_handle() {
174 return _protection_domain;
175 }
177 // ------------------------------------------------------------------
178 // ciInstanceKlass::field_cache
179 //
180 // Get the field cache associated with this klass.
181 ciConstantPoolCache* ciInstanceKlass::field_cache() {
182 if (is_shared()) {
183 return NULL;
184 }
185 if (_field_cache == NULL) {
186 assert(!is_java_lang_Object(), "Object has no fields");
187 Arena* arena = CURRENT_ENV->arena();
188 _field_cache = new (arena) ciConstantPoolCache(arena, 5);
189 }
190 return _field_cache;
191 }
193 // ------------------------------------------------------------------
194 // ciInstanceKlass::get_canonical_holder
195 //
196 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) {
197 #ifdef ASSERT
198 if (!(offset >= 0 && offset < layout_helper())) {
199 tty->print("*** get_canonical_holder(%d) on ", offset);
200 this->print();
201 tty->print_cr(" ***");
202 };
203 assert(offset >= 0 && offset < layout_helper(), "offset must be tame");
204 #endif
206 if (offset < instanceOopDesc::base_offset_in_bytes()) {
207 // All header offsets belong properly to java/lang/Object.
208 return CURRENT_ENV->Object_klass();
209 }
211 ciInstanceKlass* self = this;
212 for (;;) {
213 assert(self->is_loaded(), "must be loaded to have size");
214 ciInstanceKlass* super = self->super();
215 if (super == NULL || super->nof_nonstatic_fields() == 0 ||
216 !super->contains_field_offset(offset)) {
217 return self;
218 } else {
219 self = super; // return super->get_canonical_holder(offset)
220 }
221 }
222 }
224 // ------------------------------------------------------------------
225 // ciInstanceKlass::is_java_lang_Object
226 //
227 // Is this klass java.lang.Object?
228 bool ciInstanceKlass::is_java_lang_Object() {
229 return equals(CURRENT_ENV->Object_klass());
230 }
232 // ------------------------------------------------------------------
233 // ciInstanceKlass::uses_default_loader
234 bool ciInstanceKlass::uses_default_loader() {
235 // Note: We do not need to resolve the handle or enter the VM
236 // in order to test null-ness.
237 return _loader == NULL;
238 }
240 // ------------------------------------------------------------------
241 // ciInstanceKlass::is_in_package
242 //
243 // Is this klass in the given package?
244 bool ciInstanceKlass::is_in_package(const char* packagename, int len) {
245 // To avoid class loader mischief, this test always rejects application classes.
246 if (!uses_default_loader())
247 return false;
248 GUARDED_VM_ENTRY(
249 return is_in_package_impl(packagename, len);
250 )
251 }
253 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) {
254 ASSERT_IN_VM;
256 // If packagename contains trailing '/' exclude it from the
257 // prefix-test since we test for it explicitly.
258 if (packagename[len - 1] == '/')
259 len--;
261 if (!name()->starts_with(packagename, len))
262 return false;
264 // Test if the class name is something like "java/lang".
265 if ((len + 1) > name()->utf8_length())
266 return false;
268 // Test for trailing '/'
269 if ((char) name()->byte_at(len) != '/')
270 return false;
272 // Make sure it's not actually in a subpackage:
273 if (name()->index_of_at(len+1, "/", 1) >= 0)
274 return false;
276 return true;
277 }
279 // ------------------------------------------------------------------
280 // ciInstanceKlass::print_impl
281 //
282 // Implementation of the print method.
283 void ciInstanceKlass::print_impl(outputStream* st) {
284 ciKlass::print_impl(st);
285 GUARDED_VM_ENTRY(st->print(" loader=0x%x", (address)loader());)
286 if (is_loaded()) {
287 st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=",
288 bool_to_str(is_initialized()),
289 bool_to_str(has_finalizer()),
290 bool_to_str(has_subklass()),
291 layout_helper());
293 _flags.print_klass_flags();
295 if (_super) {
296 st->print(" super=");
297 _super->print_name();
298 }
299 if (_java_mirror) {
300 st->print(" mirror=PRESENT");
301 }
302 } else {
303 st->print(" loaded=false");
304 }
305 }
307 // ------------------------------------------------------------------
308 // ciInstanceKlass::super
309 //
310 // Get the superklass of this klass.
311 ciInstanceKlass* ciInstanceKlass::super() {
312 assert(is_loaded(), "must be loaded");
313 if (_super == NULL && !is_java_lang_Object()) {
314 GUARDED_VM_ENTRY(
315 klassOop super_klass = get_instanceKlass()->super();
316 _super = CURRENT_ENV->get_object(super_klass)->as_instance_klass();
317 )
318 }
319 return _super;
320 }
322 // ------------------------------------------------------------------
323 // ciInstanceKlass::java_mirror
324 //
325 // Get the instance of java.lang.Class corresponding to this klass.
326 ciInstance* ciInstanceKlass::java_mirror() {
327 assert(is_loaded(), "must be loaded");
328 if (_java_mirror == NULL) {
329 _java_mirror = ciKlass::java_mirror();
330 }
331 return _java_mirror;
332 }
334 // ------------------------------------------------------------------
335 // ciInstanceKlass::unique_concrete_subklass
336 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() {
337 if (!is_loaded()) return NULL; // No change if class is not loaded
338 if (!is_abstract()) return NULL; // Only applies to abstract classes.
339 if (!has_subklass()) return NULL; // Must have at least one subklass.
340 VM_ENTRY_MARK;
341 instanceKlass* ik = get_instanceKlass();
342 Klass* up = ik->up_cast_abstract();
343 assert(up->oop_is_instance(), "must be instanceKlass");
344 if (ik == up) {
345 return NULL;
346 }
347 return CURRENT_THREAD_ENV->get_object(up->as_klassOop())->as_instance_klass();
348 }
350 // ------------------------------------------------------------------
351 // ciInstanceKlass::has_finalizable_subclass
352 bool ciInstanceKlass::has_finalizable_subclass() {
353 if (!is_loaded()) return true;
354 VM_ENTRY_MARK;
355 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL;
356 }
358 // ------------------------------------------------------------------
359 // ciInstanceKlass::get_field_by_offset
360 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) {
361 if (!is_static) {
362 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) {
363 ciField* field = _nonstatic_fields->at(i);
364 int field_off = field->offset_in_bytes();
365 if (field_off == field_offset)
366 return field;
367 if (field_off > field_offset)
368 break;
369 // could do binary search or check bins, but probably not worth it
370 }
371 return NULL;
372 }
373 VM_ENTRY_MARK;
374 instanceKlass* k = get_instanceKlass();
375 fieldDescriptor fd;
376 if (!k->find_field_from_offset(field_offset, is_static, &fd)) {
377 return NULL;
378 }
379 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
380 return field;
381 }
383 // ------------------------------------------------------------------
384 // ciInstanceKlass::get_field_by_name
385 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) {
386 VM_ENTRY_MARK;
387 instanceKlass* k = get_instanceKlass();
388 fieldDescriptor fd;
389 klassOop def = k->find_field(name->get_symbolOop(), signature->get_symbolOop(), is_static, &fd);
390 if (def == NULL) {
391 return NULL;
392 }
393 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd);
394 return field;
395 }
397 // ------------------------------------------------------------------
398 // ciInstanceKlass::non_static_fields.
400 class NonStaticFieldFiller: public FieldClosure {
401 GrowableArray<ciField*>* _arr;
402 ciEnv* _curEnv;
403 public:
404 NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) :
405 _curEnv(curEnv), _arr(arr)
406 {}
407 void do_field(fieldDescriptor* fd) {
408 ciField* field = new (_curEnv->arena()) ciField(fd);
409 _arr->append(field);
410 }
411 };
413 GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() {
414 if (_non_static_fields == NULL) {
415 VM_ENTRY_MARK;
416 ciEnv* curEnv = ciEnv::current();
417 instanceKlass* ik = get_instanceKlass();
418 int max_n_fields = ik->fields()->length()/instanceKlass::next_offset;
420 _non_static_fields =
421 new (curEnv->arena()) GrowableArray<ciField*>(max_n_fields);
422 NonStaticFieldFiller filler(curEnv, _non_static_fields);
423 ik->do_nonstatic_fields(&filler);
424 }
425 return _non_static_fields;
426 }
428 static int sort_field_by_offset(ciField** a, ciField** b) {
429 return (*a)->offset_in_bytes() - (*b)->offset_in_bytes();
430 // (no worries about 32-bit overflow...)
431 }
433 // ------------------------------------------------------------------
434 // ciInstanceKlass::compute_nonstatic_fields
435 int ciInstanceKlass::compute_nonstatic_fields() {
436 assert(is_loaded(), "must be loaded");
438 if (_nonstatic_fields != NULL)
439 return _nonstatic_fields->length();
441 if (!has_nonstatic_fields()) {
442 Arena* arena = CURRENT_ENV->arena();
443 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL);
444 return 0;
445 }
446 assert(!is_java_lang_Object(), "bootstrap OK");
448 // Size in bytes of my fields, including inherited fields.
449 int fsize = nonstatic_field_size() * heapOopSize;
451 ciInstanceKlass* super = this->super();
452 GrowableArray<ciField*>* super_fields = NULL;
453 if (super != NULL && super->has_nonstatic_fields()) {
454 int super_fsize = super->nonstatic_field_size() * heapOopSize;
455 int super_flen = super->nof_nonstatic_fields();
456 super_fields = super->_nonstatic_fields;
457 assert(super_flen == 0 || super_fields != NULL, "first get nof_fields");
458 // See if I am no larger than my super; if so, I can use his fields.
459 if (fsize == super_fsize) {
460 _nonstatic_fields = super_fields;
461 return super_fields->length();
462 }
463 }
465 GrowableArray<ciField*>* fields = NULL;
466 GUARDED_VM_ENTRY({
467 fields = compute_nonstatic_fields_impl(super_fields);
468 });
470 if (fields == NULL) {
471 // This can happen if this class (java.lang.Class) has invisible fields.
472 _nonstatic_fields = super_fields;
473 return super_fields->length();
474 }
476 int flen = fields->length();
478 // Now sort them by offset, ascending.
479 // (In principle, they could mix with superclass fields.)
480 fields->sort(sort_field_by_offset);
481 #ifdef ASSERT
482 int last_offset = instanceOopDesc::base_offset_in_bytes();
483 for (int i = 0; i < fields->length(); i++) {
484 ciField* field = fields->at(i);
485 int offset = field->offset_in_bytes();
486 int size = (field->_type == NULL) ? heapOopSize : field->size_in_bytes();
487 assert(last_offset <= offset, "no field overlap");
488 if (last_offset > (int)sizeof(oopDesc))
489 assert((offset - last_offset) < BytesPerLong, "no big holes");
490 // Note: Two consecutive T_BYTE fields will be separated by wordSize-1
491 // padding bytes if one of them is declared by a superclass.
492 // This is a minor inefficiency classFileParser.cpp.
493 last_offset = offset + size;
494 }
495 assert(last_offset <= (int)instanceOopDesc::base_offset_in_bytes() + fsize, "no overflow");
496 #endif
498 _nonstatic_fields = fields;
499 return flen;
500 }
502 GrowableArray<ciField*>*
503 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>*
504 super_fields) {
505 ASSERT_IN_VM;
506 Arena* arena = CURRENT_ENV->arena();
507 int flen = 0;
508 GrowableArray<ciField*>* fields = NULL;
509 instanceKlass* k = get_instanceKlass();
510 typeArrayOop fields_array = k->fields();
511 for (int pass = 0; pass <= 1; pass++) {
512 for (int i = 0, alen = fields_array->length(); i < alen; i += instanceKlass::next_offset) {
513 fieldDescriptor fd;
514 fd.initialize(k->as_klassOop(), i);
515 if (fd.is_static()) continue;
516 if (pass == 0) {
517 flen += 1;
518 } else {
519 ciField* field = new (arena) ciField(&fd);
520 fields->append(field);
521 }
522 }
524 // Between passes, allocate the array:
525 if (pass == 0) {
526 if (flen == 0) {
527 return NULL; // return nothing if none are locally declared
528 }
529 if (super_fields != NULL) {
530 flen += super_fields->length();
531 }
532 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL);
533 if (super_fields != NULL) {
534 fields->appendAll(super_fields);
535 }
536 }
537 }
538 assert(fields->length() == flen, "sanity");
539 return fields;
540 }
542 // ------------------------------------------------------------------
543 // ciInstanceKlass::find_method
544 //
545 // Find a method in this klass.
546 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) {
547 VM_ENTRY_MARK;
548 instanceKlass* k = get_instanceKlass();
549 symbolOop name_sym = name->get_symbolOop();
550 symbolOop sig_sym= signature->get_symbolOop();
552 methodOop m = k->find_method(name_sym, sig_sym);
553 if (m == NULL) return NULL;
555 return CURRENT_THREAD_ENV->get_object(m)->as_method();
556 }
558 // ------------------------------------------------------------------
559 // ciInstanceKlass::is_leaf_type
560 bool ciInstanceKlass::is_leaf_type() {
561 assert(is_loaded(), "must be loaded");
562 if (is_shared()) {
563 return is_final(); // approximately correct
564 } else {
565 return !_has_subklass && (_nof_implementors == 0);
566 }
567 }
569 // ------------------------------------------------------------------
570 // ciInstanceKlass::implementor
571 //
572 // Report an implementor of this interface.
573 // Returns NULL if exact information is not available.
574 // Note that there are various races here, since my copy
575 // of _nof_implementors might be out of date with respect
576 // to results returned by instanceKlass::implementor.
577 // This is OK, since any dependencies we decide to assert
578 // will be checked later under the Compile_lock.
579 ciInstanceKlass* ciInstanceKlass::implementor(int n) {
580 if (n > implementors_limit) {
581 return NULL;
582 }
583 ciInstanceKlass* impl = _implementors[n];
584 if (impl == NULL) {
585 if (_nof_implementors > implementors_limit) {
586 return NULL;
587 }
588 // Go into the VM to fetch the implementor.
589 {
590 VM_ENTRY_MARK;
591 klassOop k = get_instanceKlass()->implementor(n);
592 if (k != NULL) {
593 impl = CURRENT_THREAD_ENV->get_object(k)->as_instance_klass();
594 }
595 }
596 // Memoize this result.
597 if (!is_shared()) {
598 _implementors[n] = (impl == NULL)? this: impl;
599 }
600 } else if (impl == this) {
601 impl = NULL; // memoized null result from a VM query
602 }
603 return impl;
604 }