Mercurial > hg > truffle
annotate src/share/vm/ci/ciInstanceKlass.cpp @ 6948:e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 12 Nov 2012 23:14:12 +0100 |
parents | 957c266d8bc5 da91efe96a93 |
children | 2cb439954abf |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 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 #include "precompiled.hpp" |
26 #include "ci/ciField.hpp" | |
27 #include "ci/ciInstance.hpp" | |
28 #include "ci/ciInstanceKlass.hpp" | |
29 #include "ci/ciUtilities.hpp" | |
30 #include "classfile/systemDictionary.hpp" | |
31 #include "memory/allocation.hpp" | |
32 #include "memory/allocation.inline.hpp" | |
33 #include "oops/oop.inline.hpp" | |
3938 | 34 #include "oops/fieldStreams.hpp" |
1972 | 35 #include "runtime/fieldDescriptor.hpp" |
0 | 36 |
37 // ciInstanceKlass | |
38 // | |
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39 // This class represents a Klass* in the HotSpot virtual machine |
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40 // whose Klass part in an InstanceKlass. |
0 | 41 |
42 // ------------------------------------------------------------------ | |
43 // ciInstanceKlass::ciInstanceKlass | |
44 // | |
45 // Loaded instance klass. | |
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46 ciInstanceKlass::ciInstanceKlass(KlassHandle h_k) : |
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47 ciKlass(h_k), _non_static_fields(NULL) |
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48 { |
0 | 49 assert(get_Klass()->oop_is_instance(), "wrong type"); |
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50 assert(get_instanceKlass()->is_loaded(), "must be at least loaded"); |
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51 InstanceKlass* ik = get_instanceKlass(); |
0 | 52 |
53 AccessFlags access_flags = ik->access_flags(); | |
54 _flags = ciFlags(access_flags); | |
55 _has_finalizer = access_flags.has_finalizer(); | |
56 _has_subklass = ik->subklass() != NULL; | |
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57 _init_state = ik->init_state(); |
0 | 58 _nonstatic_field_size = ik->nonstatic_field_size(); |
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59 _has_nonstatic_fields = ik->has_nonstatic_fields(); |
0 | 60 _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields: |
61 | |
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62 _implementor = NULL; // we will fill these lazily |
0 | 63 |
64 Thread *thread = Thread::current(); | |
65 if (ciObjectFactory::is_initialized()) { | |
66 _loader = JNIHandles::make_local(thread, ik->class_loader()); | |
67 _protection_domain = JNIHandles::make_local(thread, | |
68 ik->protection_domain()); | |
69 _is_shared = false; | |
70 } else { | |
71 Handle h_loader(thread, ik->class_loader()); | |
72 Handle h_protection_domain(thread, ik->protection_domain()); | |
73 _loader = JNIHandles::make_global(h_loader); | |
74 _protection_domain = JNIHandles::make_global(h_protection_domain); | |
75 _is_shared = true; | |
76 } | |
77 | |
78 // Lazy fields get filled in only upon request. | |
79 _super = NULL; | |
80 _java_mirror = NULL; | |
81 | |
82 if (is_shared()) { | |
1142 | 83 if (h_k() != SystemDictionary::Object_klass()) { |
0 | 84 super(); |
85 } | |
86 //compute_nonstatic_fields(); // done outside of constructor | |
87 } | |
88 | |
89 _field_cache = NULL; | |
90 } | |
91 | |
92 // Version for unloaded classes: | |
93 ciInstanceKlass::ciInstanceKlass(ciSymbol* name, | |
94 jobject loader, jobject protection_domain) | |
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95 : ciKlass(name, T_OBJECT) |
0 | 96 { |
97 assert(name->byte_at(0) != '[', "not an instance klass"); | |
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98 _init_state = (InstanceKlass::ClassState)0; |
0 | 99 _nonstatic_field_size = -1; |
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100 _has_nonstatic_fields = false; |
0 | 101 _nonstatic_fields = NULL; |
102 _loader = loader; | |
103 _protection_domain = protection_domain; | |
104 _is_shared = false; | |
105 _super = NULL; | |
106 _java_mirror = NULL; | |
107 _field_cache = NULL; | |
108 } | |
109 | |
110 | |
111 | |
112 // ------------------------------------------------------------------ | |
113 // ciInstanceKlass::compute_shared_is_initialized | |
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114 void ciInstanceKlass::compute_shared_init_state() { |
0 | 115 GUARDED_VM_ENTRY( |
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116 InstanceKlass* ik = get_instanceKlass(); |
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117 _init_state = ik->init_state(); |
0 | 118 ) |
119 } | |
120 | |
121 // ------------------------------------------------------------------ | |
122 // ciInstanceKlass::compute_shared_has_subklass | |
123 bool ciInstanceKlass::compute_shared_has_subklass() { | |
124 GUARDED_VM_ENTRY( | |
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125 InstanceKlass* ik = get_instanceKlass(); |
0 | 126 _has_subklass = ik->subklass() != NULL; |
127 return _has_subklass; | |
128 ) | |
129 } | |
130 | |
131 // ------------------------------------------------------------------ | |
132 // ciInstanceKlass::loader | |
133 oop ciInstanceKlass::loader() { | |
134 ASSERT_IN_VM; | |
135 return JNIHandles::resolve(_loader); | |
136 } | |
137 | |
138 // ------------------------------------------------------------------ | |
139 // ciInstanceKlass::loader_handle | |
140 jobject ciInstanceKlass::loader_handle() { | |
141 return _loader; | |
142 } | |
143 | |
144 // ------------------------------------------------------------------ | |
145 // ciInstanceKlass::protection_domain | |
146 oop ciInstanceKlass::protection_domain() { | |
147 ASSERT_IN_VM; | |
148 return JNIHandles::resolve(_protection_domain); | |
149 } | |
150 | |
151 // ------------------------------------------------------------------ | |
152 // ciInstanceKlass::protection_domain_handle | |
153 jobject ciInstanceKlass::protection_domain_handle() { | |
154 return _protection_domain; | |
155 } | |
156 | |
157 // ------------------------------------------------------------------ | |
158 // ciInstanceKlass::field_cache | |
159 // | |
160 // Get the field cache associated with this klass. | |
161 ciConstantPoolCache* ciInstanceKlass::field_cache() { | |
162 if (is_shared()) { | |
163 return NULL; | |
164 } | |
165 if (_field_cache == NULL) { | |
166 assert(!is_java_lang_Object(), "Object has no fields"); | |
167 Arena* arena = CURRENT_ENV->arena(); | |
168 _field_cache = new (arena) ciConstantPoolCache(arena, 5); | |
169 } | |
170 return _field_cache; | |
171 } | |
172 | |
173 // ------------------------------------------------------------------ | |
174 // ciInstanceKlass::get_canonical_holder | |
175 // | |
176 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) { | |
177 #ifdef ASSERT | |
178 if (!(offset >= 0 && offset < layout_helper())) { | |
179 tty->print("*** get_canonical_holder(%d) on ", offset); | |
180 this->print(); | |
181 tty->print_cr(" ***"); | |
182 }; | |
183 assert(offset >= 0 && offset < layout_helper(), "offset must be tame"); | |
184 #endif | |
185 | |
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186 if (offset < instanceOopDesc::base_offset_in_bytes()) { |
0 | 187 // All header offsets belong properly to java/lang/Object. |
188 return CURRENT_ENV->Object_klass(); | |
189 } | |
190 | |
191 ciInstanceKlass* self = this; | |
192 for (;;) { | |
193 assert(self->is_loaded(), "must be loaded to have size"); | |
194 ciInstanceKlass* super = self->super(); | |
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195 if (super == NULL || super->nof_nonstatic_fields() == 0 || |
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196 !super->contains_field_offset(offset)) { |
0 | 197 return self; |
198 } else { | |
199 self = super; // return super->get_canonical_holder(offset) | |
200 } | |
201 } | |
202 } | |
203 | |
204 // ------------------------------------------------------------------ | |
205 // ciInstanceKlass::is_java_lang_Object | |
206 // | |
207 // Is this klass java.lang.Object? | |
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208 bool ciInstanceKlass::is_java_lang_Object() const { |
0 | 209 return equals(CURRENT_ENV->Object_klass()); |
210 } | |
211 | |
212 // ------------------------------------------------------------------ | |
213 // ciInstanceKlass::uses_default_loader | |
214 bool ciInstanceKlass::uses_default_loader() { | |
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215 // Note: We do not need to resolve the handle or enter the VM |
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216 // in order to test null-ness. |
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217 return _loader == NULL; |
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218 } |
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219 |
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220 // ------------------------------------------------------------------ |
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221 // ciInstanceKlass::is_in_package |
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222 // |
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223 // Is this klass in the given package? |
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224 bool ciInstanceKlass::is_in_package(const char* packagename, int len) { |
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225 // To avoid class loader mischief, this test always rejects application classes. |
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226 if (!uses_default_loader()) |
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227 return false; |
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228 GUARDED_VM_ENTRY( |
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229 return is_in_package_impl(packagename, len); |
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230 ) |
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231 } |
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232 |
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233 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) { |
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234 ASSERT_IN_VM; |
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235 |
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236 // If packagename contains trailing '/' exclude it from the |
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237 // prefix-test since we test for it explicitly. |
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238 if (packagename[len - 1] == '/') |
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239 len--; |
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240 |
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241 if (!name()->starts_with(packagename, len)) |
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242 return false; |
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243 |
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244 // Test if the class name is something like "java/lang". |
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245 if ((len + 1) > name()->utf8_length()) |
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246 return false; |
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247 |
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248 // Test for trailing '/' |
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249 if ((char) name()->byte_at(len) != '/') |
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250 return false; |
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251 |
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252 // Make sure it's not actually in a subpackage: |
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253 if (name()->index_of_at(len+1, "/", 1) >= 0) |
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254 return false; |
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255 |
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256 return true; |
0 | 257 } |
258 | |
259 // ------------------------------------------------------------------ | |
260 // ciInstanceKlass::print_impl | |
261 // | |
262 // Implementation of the print method. | |
263 void ciInstanceKlass::print_impl(outputStream* st) { | |
264 ciKlass::print_impl(st); | |
265 GUARDED_VM_ENTRY(st->print(" loader=0x%x", (address)loader());) | |
266 if (is_loaded()) { | |
267 st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=", | |
268 bool_to_str(is_initialized()), | |
269 bool_to_str(has_finalizer()), | |
270 bool_to_str(has_subklass()), | |
271 layout_helper()); | |
272 | |
273 _flags.print_klass_flags(); | |
274 | |
275 if (_super) { | |
276 st->print(" super="); | |
277 _super->print_name(); | |
278 } | |
279 if (_java_mirror) { | |
280 st->print(" mirror=PRESENT"); | |
281 } | |
282 } else { | |
283 st->print(" loaded=false"); | |
284 } | |
285 } | |
286 | |
287 // ------------------------------------------------------------------ | |
288 // ciInstanceKlass::super | |
289 // | |
290 // Get the superklass of this klass. | |
291 ciInstanceKlass* ciInstanceKlass::super() { | |
292 assert(is_loaded(), "must be loaded"); | |
293 if (_super == NULL && !is_java_lang_Object()) { | |
294 GUARDED_VM_ENTRY( | |
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295 Klass* super_klass = get_instanceKlass()->super(); |
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296 _super = CURRENT_ENV->get_instance_klass(super_klass); |
0 | 297 ) |
298 } | |
299 return _super; | |
300 } | |
301 | |
302 // ------------------------------------------------------------------ | |
303 // ciInstanceKlass::java_mirror | |
304 // | |
305 // Get the instance of java.lang.Class corresponding to this klass. | |
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306 // Cache it on this->_java_mirror. |
0 | 307 ciInstance* ciInstanceKlass::java_mirror() { |
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308 if (is_shared()) { |
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309 return ciKlass::java_mirror(); |
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310 } |
0 | 311 if (_java_mirror == NULL) { |
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312 _java_mirror = ciKlass::java_mirror(); |
0 | 313 } |
314 return _java_mirror; | |
315 } | |
316 | |
317 // ------------------------------------------------------------------ | |
318 // ciInstanceKlass::unique_concrete_subklass | |
319 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() { | |
320 if (!is_loaded()) return NULL; // No change if class is not loaded | |
321 if (!is_abstract()) return NULL; // Only applies to abstract classes. | |
322 if (!has_subklass()) return NULL; // Must have at least one subklass. | |
323 VM_ENTRY_MARK; | |
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324 InstanceKlass* ik = get_instanceKlass(); |
0 | 325 Klass* up = ik->up_cast_abstract(); |
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326 assert(up->oop_is_instance(), "must be InstanceKlass"); |
0 | 327 if (ik == up) { |
328 return NULL; | |
329 } | |
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330 return CURRENT_THREAD_ENV->get_instance_klass(up); |
0 | 331 } |
332 | |
333 // ------------------------------------------------------------------ | |
334 // ciInstanceKlass::has_finalizable_subclass | |
335 bool ciInstanceKlass::has_finalizable_subclass() { | |
336 if (!is_loaded()) return true; | |
337 VM_ENTRY_MARK; | |
338 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL; | |
339 } | |
340 | |
341 // ------------------------------------------------------------------ | |
342 // ciInstanceKlass::get_field_by_offset | |
343 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) { | |
344 if (!is_static) { | |
345 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) { | |
346 ciField* field = _nonstatic_fields->at(i); | |
347 int field_off = field->offset_in_bytes(); | |
348 if (field_off == field_offset) | |
349 return field; | |
350 if (field_off > field_offset) | |
351 break; | |
352 // could do binary search or check bins, but probably not worth it | |
353 } | |
354 return NULL; | |
355 } | |
356 VM_ENTRY_MARK; | |
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357 InstanceKlass* k = get_instanceKlass(); |
0 | 358 fieldDescriptor fd; |
359 if (!k->find_field_from_offset(field_offset, is_static, &fd)) { | |
360 return NULL; | |
361 } | |
362 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd); | |
363 return field; | |
364 } | |
365 | |
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366 // ------------------------------------------------------------------ |
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367 // ciInstanceKlass::get_field_by_name |
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368 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) { |
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369 VM_ENTRY_MARK; |
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370 InstanceKlass* k = get_instanceKlass(); |
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371 fieldDescriptor fd; |
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372 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd); |
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373 if (def == NULL) { |
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374 return NULL; |
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375 } |
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376 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd); |
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377 return field; |
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378 } |
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379 |
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380 // ------------------------------------------------------------------ |
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381 // ciInstanceKlass::non_static_fields. |
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382 |
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383 class NonStaticFieldFiller: public FieldClosure { |
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384 GrowableArray<ciField*>* _arr; |
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385 ciEnv* _curEnv; |
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386 public: |
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387 NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) : |
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388 _curEnv(curEnv), _arr(arr) |
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389 {} |
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390 void do_field(fieldDescriptor* fd) { |
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391 ciField* field = new (_curEnv->arena()) ciField(fd); |
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392 _arr->append(field); |
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393 } |
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394 }; |
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395 |
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396 GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() { |
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397 if (_non_static_fields == NULL) { |
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398 VM_ENTRY_MARK; |
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399 ciEnv* curEnv = ciEnv::current(); |
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400 InstanceKlass* ik = get_instanceKlass(); |
3938 | 401 int max_n_fields = ik->java_fields_count(); |
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402 |
1685 | 403 Arena* arena = curEnv->arena(); |
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404 _non_static_fields = |
1685 | 405 new (arena) GrowableArray<ciField*>(arena, max_n_fields, 0, NULL); |
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406 NonStaticFieldFiller filler(curEnv, _non_static_fields); |
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407 ik->do_nonstatic_fields(&filler); |
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408 } |
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409 return _non_static_fields; |
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410 } |
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411 |
0 | 412 static int sort_field_by_offset(ciField** a, ciField** b) { |
413 return (*a)->offset_in_bytes() - (*b)->offset_in_bytes(); | |
414 // (no worries about 32-bit overflow...) | |
415 } | |
416 | |
417 // ------------------------------------------------------------------ | |
418 // ciInstanceKlass::compute_nonstatic_fields | |
419 int ciInstanceKlass::compute_nonstatic_fields() { | |
420 assert(is_loaded(), "must be loaded"); | |
421 | |
422 if (_nonstatic_fields != NULL) | |
423 return _nonstatic_fields->length(); | |
424 | |
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425 if (!has_nonstatic_fields()) { |
0 | 426 Arena* arena = CURRENT_ENV->arena(); |
427 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL); | |
428 return 0; | |
429 } | |
430 assert(!is_java_lang_Object(), "bootstrap OK"); | |
431 | |
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432 // Size in bytes of my fields, including inherited fields. |
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433 int fsize = nonstatic_field_size() * heapOopSize; |
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434 |
0 | 435 ciInstanceKlass* super = this->super(); |
436 GrowableArray<ciField*>* super_fields = NULL; | |
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437 if (super != NULL && super->has_nonstatic_fields()) { |
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438 int super_fsize = super->nonstatic_field_size() * heapOopSize; |
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439 int super_flen = super->nof_nonstatic_fields(); |
0 | 440 super_fields = super->_nonstatic_fields; |
441 assert(super_flen == 0 || super_fields != NULL, "first get nof_fields"); | |
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442 // See if I am no larger than my super; if so, I can use his fields. |
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443 if (fsize == super_fsize) { |
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444 _nonstatic_fields = super_fields; |
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445 return super_fields->length(); |
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446 } |
0 | 447 } |
448 | |
449 GrowableArray<ciField*>* fields = NULL; | |
450 GUARDED_VM_ENTRY({ | |
451 fields = compute_nonstatic_fields_impl(super_fields); | |
452 }); | |
453 | |
454 if (fields == NULL) { | |
455 // This can happen if this class (java.lang.Class) has invisible fields. | |
456 _nonstatic_fields = super_fields; | |
457 return super_fields->length(); | |
458 } | |
459 | |
460 int flen = fields->length(); | |
461 | |
462 // Now sort them by offset, ascending. | |
463 // (In principle, they could mix with superclass fields.) | |
464 fields->sort(sort_field_by_offset); | |
465 _nonstatic_fields = fields; | |
466 return flen; | |
467 } | |
468 | |
469 GrowableArray<ciField*>* | |
470 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>* | |
471 super_fields) { | |
472 ASSERT_IN_VM; | |
473 Arena* arena = CURRENT_ENV->arena(); | |
474 int flen = 0; | |
475 GrowableArray<ciField*>* fields = NULL; | |
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476 InstanceKlass* k = get_instanceKlass(); |
3938 | 477 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
478 if (fs.access_flags().is_static()) continue; | |
479 flen += 1; | |
480 } | |
0 | 481 |
3938 | 482 // allocate the array: |
483 if (flen == 0) { | |
484 return NULL; // return nothing if none are locally declared | |
485 } | |
486 if (super_fields != NULL) { | |
487 flen += super_fields->length(); | |
488 } | |
489 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL); | |
490 if (super_fields != NULL) { | |
491 fields->appendAll(super_fields); | |
492 } | |
493 | |
494 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { | |
495 if (fs.access_flags().is_static()) continue; | |
496 fieldDescriptor fd; | |
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497 fd.initialize(k, fs.index()); |
3938 | 498 ciField* field = new (arena) ciField(&fd); |
499 fields->append(field); | |
0 | 500 } |
501 assert(fields->length() == flen, "sanity"); | |
502 return fields; | |
503 } | |
504 | |
505 // ------------------------------------------------------------------ | |
506 // ciInstanceKlass::find_method | |
507 // | |
508 // Find a method in this klass. | |
509 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) { | |
510 VM_ENTRY_MARK; | |
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511 InstanceKlass* k = get_instanceKlass(); |
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512 Symbol* name_sym = name->get_symbol(); |
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513 Symbol* sig_sym= signature->get_symbol(); |
0 | 514 |
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515 Method* m = k->find_method(name_sym, sig_sym); |
0 | 516 if (m == NULL) return NULL; |
517 | |
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518 return CURRENT_THREAD_ENV->get_method(m); |
0 | 519 } |
520 | |
521 // ------------------------------------------------------------------ | |
522 // ciInstanceKlass::is_leaf_type | |
523 bool ciInstanceKlass::is_leaf_type() { | |
524 assert(is_loaded(), "must be loaded"); | |
525 if (is_shared()) { | |
526 return is_final(); // approximately correct | |
527 } else { | |
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528 return !_has_subklass && (nof_implementors() == 0); |
0 | 529 } |
530 } | |
531 | |
532 // ------------------------------------------------------------------ | |
533 // ciInstanceKlass::implementor | |
534 // | |
535 // Report an implementor of this interface. | |
536 // Note that there are various races here, since my copy | |
537 // of _nof_implementors might be out of date with respect | |
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538 // to results returned by InstanceKlass::implementor. |
0 | 539 // This is OK, since any dependencies we decide to assert |
540 // will be checked later under the Compile_lock. | |
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541 ciInstanceKlass* ciInstanceKlass::implementor() { |
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542 ciInstanceKlass* impl = _implementor; |
0 | 543 if (impl == NULL) { |
544 // Go into the VM to fetch the implementor. | |
545 { | |
546 VM_ENTRY_MARK; | |
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547 Klass* k = get_instanceKlass()->implementor(); |
0 | 548 if (k != NULL) { |
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549 if (k == get_instanceKlass()) { |
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550 // More than one implementors. Use 'this' in this case. |
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551 impl = this; |
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552 } else { |
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553 impl = CURRENT_THREAD_ENV->get_instance_klass(k); |
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554 } |
0 | 555 } |
556 } | |
557 // Memoize this result. | |
558 if (!is_shared()) { | |
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559 _implementor = impl; |
0 | 560 } |
561 } | |
562 return impl; | |
563 } |