Mercurial > hg > truffle
annotate src/share/vm/ci/ciInstanceKlass.cpp @ 13086:096c224171c4
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Wed, 20 Nov 2013 00:10:38 +0100 |
| parents | cefad50507d8 4d3575d37a07 |
| children | 52b4284cb496 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2013, 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(); |
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60 _has_default_methods = ik->has_default_methods(); |
| 0 | 61 _nonstatic_fields = NULL; // initialized lazily by compute_nonstatic_fields: |
| 62 | |
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63 _implementor = NULL; // we will fill these lazily |
| 0 | 64 |
| 65 Thread *thread = Thread::current(); | |
| 66 if (ciObjectFactory::is_initialized()) { | |
| 67 _loader = JNIHandles::make_local(thread, ik->class_loader()); | |
| 68 _protection_domain = JNIHandles::make_local(thread, | |
| 69 ik->protection_domain()); | |
| 70 _is_shared = false; | |
| 71 } else { | |
| 72 Handle h_loader(thread, ik->class_loader()); | |
| 73 Handle h_protection_domain(thread, ik->protection_domain()); | |
| 74 _loader = JNIHandles::make_global(h_loader); | |
| 75 _protection_domain = JNIHandles::make_global(h_protection_domain); | |
| 76 _is_shared = true; | |
| 77 } | |
| 78 | |
| 79 // Lazy fields get filled in only upon request. | |
| 80 _super = NULL; | |
| 81 _java_mirror = NULL; | |
| 82 | |
| 83 if (is_shared()) { | |
| 1142 | 84 if (h_k() != SystemDictionary::Object_klass()) { |
| 0 | 85 super(); |
| 86 } | |
| 87 //compute_nonstatic_fields(); // done outside of constructor | |
| 88 } | |
| 89 | |
| 90 _field_cache = NULL; | |
| 91 } | |
| 92 | |
| 93 // Version for unloaded classes: | |
| 94 ciInstanceKlass::ciInstanceKlass(ciSymbol* name, | |
| 95 jobject loader, jobject protection_domain) | |
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96 : ciKlass(name, T_OBJECT) |
| 0 | 97 { |
| 98 assert(name->byte_at(0) != '[', "not an instance klass"); | |
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99 _init_state = (InstanceKlass::ClassState)0; |
| 0 | 100 _nonstatic_field_size = -1; |
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101 _has_nonstatic_fields = false; |
| 0 | 102 _nonstatic_fields = NULL; |
| 103 _loader = loader; | |
| 104 _protection_domain = protection_domain; | |
| 105 _is_shared = false; | |
| 106 _super = NULL; | |
| 107 _java_mirror = NULL; | |
| 108 _field_cache = NULL; | |
| 109 } | |
| 110 | |
| 111 | |
| 112 | |
| 113 // ------------------------------------------------------------------ | |
| 114 // ciInstanceKlass::compute_shared_is_initialized | |
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115 void ciInstanceKlass::compute_shared_init_state() { |
| 0 | 116 GUARDED_VM_ENTRY( |
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117 InstanceKlass* ik = get_instanceKlass(); |
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118 _init_state = ik->init_state(); |
| 0 | 119 ) |
| 120 } | |
| 121 | |
| 122 // ------------------------------------------------------------------ | |
| 123 // ciInstanceKlass::compute_shared_has_subklass | |
| 124 bool ciInstanceKlass::compute_shared_has_subklass() { | |
| 125 GUARDED_VM_ENTRY( | |
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126 InstanceKlass* ik = get_instanceKlass(); |
| 0 | 127 _has_subklass = ik->subklass() != NULL; |
| 128 return _has_subklass; | |
| 129 ) | |
| 130 } | |
| 131 | |
| 132 // ------------------------------------------------------------------ | |
| 133 // ciInstanceKlass::loader | |
| 134 oop ciInstanceKlass::loader() { | |
| 135 ASSERT_IN_VM; | |
| 136 return JNIHandles::resolve(_loader); | |
| 137 } | |
| 138 | |
| 139 // ------------------------------------------------------------------ | |
| 140 // ciInstanceKlass::loader_handle | |
| 141 jobject ciInstanceKlass::loader_handle() { | |
| 142 return _loader; | |
| 143 } | |
| 144 | |
| 145 // ------------------------------------------------------------------ | |
| 146 // ciInstanceKlass::protection_domain | |
| 147 oop ciInstanceKlass::protection_domain() { | |
| 148 ASSERT_IN_VM; | |
| 149 return JNIHandles::resolve(_protection_domain); | |
| 150 } | |
| 151 | |
| 152 // ------------------------------------------------------------------ | |
| 153 // ciInstanceKlass::protection_domain_handle | |
| 154 jobject ciInstanceKlass::protection_domain_handle() { | |
| 155 return _protection_domain; | |
| 156 } | |
| 157 | |
| 158 // ------------------------------------------------------------------ | |
| 159 // ciInstanceKlass::field_cache | |
| 160 // | |
| 161 // Get the field cache associated with this klass. | |
| 162 ciConstantPoolCache* ciInstanceKlass::field_cache() { | |
| 163 if (is_shared()) { | |
| 164 return NULL; | |
| 165 } | |
| 166 if (_field_cache == NULL) { | |
| 167 assert(!is_java_lang_Object(), "Object has no fields"); | |
| 168 Arena* arena = CURRENT_ENV->arena(); | |
| 169 _field_cache = new (arena) ciConstantPoolCache(arena, 5); | |
| 170 } | |
| 171 return _field_cache; | |
| 172 } | |
| 173 | |
| 174 // ------------------------------------------------------------------ | |
| 175 // ciInstanceKlass::get_canonical_holder | |
| 176 // | |
| 177 ciInstanceKlass* ciInstanceKlass::get_canonical_holder(int offset) { | |
| 178 #ifdef ASSERT | |
| 179 if (!(offset >= 0 && offset < layout_helper())) { | |
| 180 tty->print("*** get_canonical_holder(%d) on ", offset); | |
| 181 this->print(); | |
| 182 tty->print_cr(" ***"); | |
| 183 }; | |
| 184 assert(offset >= 0 && offset < layout_helper(), "offset must be tame"); | |
| 185 #endif | |
| 186 | |
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187 if (offset < instanceOopDesc::base_offset_in_bytes()) { |
| 0 | 188 // All header offsets belong properly to java/lang/Object. |
| 189 return CURRENT_ENV->Object_klass(); | |
| 190 } | |
| 191 | |
| 192 ciInstanceKlass* self = this; | |
| 193 for (;;) { | |
| 194 assert(self->is_loaded(), "must be loaded to have size"); | |
| 195 ciInstanceKlass* super = self->super(); | |
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196 if (super == NULL || super->nof_nonstatic_fields() == 0 || |
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197 !super->contains_field_offset(offset)) { |
| 0 | 198 return self; |
| 199 } else { | |
| 200 self = super; // return super->get_canonical_holder(offset) | |
| 201 } | |
| 202 } | |
| 203 } | |
| 204 | |
| 205 // ------------------------------------------------------------------ | |
| 206 // ciInstanceKlass::is_java_lang_Object | |
| 207 // | |
| 208 // Is this klass java.lang.Object? | |
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209 bool ciInstanceKlass::is_java_lang_Object() const { |
| 0 | 210 return equals(CURRENT_ENV->Object_klass()); |
| 211 } | |
| 212 | |
| 213 // ------------------------------------------------------------------ | |
| 214 // ciInstanceKlass::uses_default_loader | |
| 10278 | 215 bool ciInstanceKlass::uses_default_loader() const { |
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216 // Note: We do not need to resolve the handle or enter the VM |
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217 // in order to test null-ness. |
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218 return _loader == NULL; |
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219 } |
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220 |
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221 // ------------------------------------------------------------------ |
| 10278 | 222 |
| 223 /** | |
| 224 * Return basic type of boxed value for box klass or T_OBJECT if not. | |
| 225 */ | |
| 226 BasicType ciInstanceKlass::box_klass_type() const { | |
| 227 if (uses_default_loader() && is_loaded()) { | |
| 228 return SystemDictionary::box_klass_type(get_Klass()); | |
| 229 } else { | |
| 230 return T_OBJECT; | |
| 231 } | |
| 232 } | |
| 233 | |
| 234 /** | |
| 235 * Is this boxing klass? | |
| 236 */ | |
| 237 bool ciInstanceKlass::is_box_klass() const { | |
| 238 return is_java_primitive(box_klass_type()); | |
| 239 } | |
| 240 | |
| 241 /** | |
| 242 * Is this boxed value offset? | |
| 243 */ | |
| 244 bool ciInstanceKlass::is_boxed_value_offset(int offset) const { | |
| 245 BasicType bt = box_klass_type(); | |
| 246 return is_java_primitive(bt) && | |
| 247 (offset == java_lang_boxing_object::value_offset_in_bytes(bt)); | |
| 248 } | |
| 249 | |
| 250 // ------------------------------------------------------------------ | |
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251 // ciInstanceKlass::is_in_package |
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252 // |
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253 // Is this klass in the given package? |
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254 bool ciInstanceKlass::is_in_package(const char* packagename, int len) { |
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255 // To avoid class loader mischief, this test always rejects application classes. |
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256 if (!uses_default_loader()) |
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257 return false; |
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258 GUARDED_VM_ENTRY( |
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259 return is_in_package_impl(packagename, len); |
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260 ) |
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261 } |
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262 |
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263 bool ciInstanceKlass::is_in_package_impl(const char* packagename, int len) { |
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264 ASSERT_IN_VM; |
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265 |
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266 // If packagename contains trailing '/' exclude it from the |
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267 // prefix-test since we test for it explicitly. |
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268 if (packagename[len - 1] == '/') |
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269 len--; |
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270 |
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271 if (!name()->starts_with(packagename, len)) |
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272 return false; |
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273 |
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274 // Test if the class name is something like "java/lang". |
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275 if ((len + 1) > name()->utf8_length()) |
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276 return false; |
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277 |
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278 // Test for trailing '/' |
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279 if ((char) name()->byte_at(len) != '/') |
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280 return false; |
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281 |
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282 // Make sure it's not actually in a subpackage: |
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283 if (name()->index_of_at(len+1, "/", 1) >= 0) |
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284 return false; |
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285 |
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286 return true; |
| 0 | 287 } |
| 288 | |
| 289 // ------------------------------------------------------------------ | |
| 290 // ciInstanceKlass::print_impl | |
| 291 // | |
| 292 // Implementation of the print method. | |
| 293 void ciInstanceKlass::print_impl(outputStream* st) { | |
| 294 ciKlass::print_impl(st); | |
| 295 GUARDED_VM_ENTRY(st->print(" loader=0x%x", (address)loader());) | |
| 296 if (is_loaded()) { | |
| 297 st->print(" loaded=true initialized=%s finalized=%s subklass=%s size=%d flags=", | |
| 298 bool_to_str(is_initialized()), | |
| 299 bool_to_str(has_finalizer()), | |
| 300 bool_to_str(has_subklass()), | |
| 301 layout_helper()); | |
| 302 | |
| 303 _flags.print_klass_flags(); | |
| 304 | |
| 305 if (_super) { | |
| 306 st->print(" super="); | |
| 307 _super->print_name(); | |
| 308 } | |
| 309 if (_java_mirror) { | |
| 310 st->print(" mirror=PRESENT"); | |
| 311 } | |
| 312 } else { | |
| 313 st->print(" loaded=false"); | |
| 314 } | |
| 315 } | |
| 316 | |
| 317 // ------------------------------------------------------------------ | |
| 318 // ciInstanceKlass::super | |
| 319 // | |
| 320 // Get the superklass of this klass. | |
| 321 ciInstanceKlass* ciInstanceKlass::super() { | |
| 322 assert(is_loaded(), "must be loaded"); | |
| 323 if (_super == NULL && !is_java_lang_Object()) { | |
| 324 GUARDED_VM_ENTRY( | |
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325 Klass* super_klass = get_instanceKlass()->super(); |
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326 _super = CURRENT_ENV->get_instance_klass(super_klass); |
| 0 | 327 ) |
| 328 } | |
| 329 return _super; | |
| 330 } | |
| 331 | |
| 332 // ------------------------------------------------------------------ | |
| 333 // ciInstanceKlass::java_mirror | |
| 334 // | |
| 335 // Get the instance of java.lang.Class corresponding to this klass. | |
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336 // Cache it on this->_java_mirror. |
| 0 | 337 ciInstance* ciInstanceKlass::java_mirror() { |
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338 if (is_shared()) { |
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339 return ciKlass::java_mirror(); |
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340 } |
| 0 | 341 if (_java_mirror == NULL) { |
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342 _java_mirror = ciKlass::java_mirror(); |
| 0 | 343 } |
| 344 return _java_mirror; | |
| 345 } | |
| 346 | |
| 347 // ------------------------------------------------------------------ | |
| 348 // ciInstanceKlass::unique_concrete_subklass | |
| 349 ciInstanceKlass* ciInstanceKlass::unique_concrete_subklass() { | |
| 350 if (!is_loaded()) return NULL; // No change if class is not loaded | |
| 351 if (!is_abstract()) return NULL; // Only applies to abstract classes. | |
| 352 if (!has_subklass()) return NULL; // Must have at least one subklass. | |
| 353 VM_ENTRY_MARK; | |
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354 InstanceKlass* ik = get_instanceKlass(); |
| 0 | 355 Klass* up = ik->up_cast_abstract(); |
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356 assert(up->oop_is_instance(), "must be InstanceKlass"); |
| 0 | 357 if (ik == up) { |
| 358 return NULL; | |
| 359 } | |
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360 return CURRENT_THREAD_ENV->get_instance_klass(up); |
| 0 | 361 } |
| 362 | |
| 363 // ------------------------------------------------------------------ | |
| 364 // ciInstanceKlass::has_finalizable_subclass | |
| 365 bool ciInstanceKlass::has_finalizable_subclass() { | |
| 366 if (!is_loaded()) return true; | |
| 367 VM_ENTRY_MARK; | |
| 368 return Dependencies::find_finalizable_subclass(get_instanceKlass()) != NULL; | |
| 369 } | |
| 370 | |
| 371 // ------------------------------------------------------------------ | |
| 372 // ciInstanceKlass::get_field_by_offset | |
| 373 ciField* ciInstanceKlass::get_field_by_offset(int field_offset, bool is_static) { | |
| 374 if (!is_static) { | |
| 375 for (int i = 0, len = nof_nonstatic_fields(); i < len; i++) { | |
| 376 ciField* field = _nonstatic_fields->at(i); | |
| 377 int field_off = field->offset_in_bytes(); | |
| 378 if (field_off == field_offset) | |
| 379 return field; | |
| 380 if (field_off > field_offset) | |
| 381 break; | |
| 382 // could do binary search or check bins, but probably not worth it | |
| 383 } | |
| 384 return NULL; | |
| 385 } | |
| 386 VM_ENTRY_MARK; | |
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387 InstanceKlass* k = get_instanceKlass(); |
| 0 | 388 fieldDescriptor fd; |
| 389 if (!k->find_field_from_offset(field_offset, is_static, &fd)) { | |
| 390 return NULL; | |
| 391 } | |
| 392 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd); | |
| 393 return field; | |
| 394 } | |
| 395 | |
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396 // ------------------------------------------------------------------ |
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397 // ciInstanceKlass::get_field_by_name |
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398 ciField* ciInstanceKlass::get_field_by_name(ciSymbol* name, ciSymbol* signature, bool is_static) { |
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399 VM_ENTRY_MARK; |
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400 InstanceKlass* k = get_instanceKlass(); |
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401 fieldDescriptor fd; |
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402 Klass* def = k->find_field(name->get_symbol(), signature->get_symbol(), is_static, &fd); |
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403 if (def == NULL) { |
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404 return NULL; |
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405 } |
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406 ciField* field = new (CURRENT_THREAD_ENV->arena()) ciField(&fd); |
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407 return field; |
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408 } |
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409 |
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410 // ------------------------------------------------------------------ |
|
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411 // ciInstanceKlass::non_static_fields. |
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412 |
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413 class NonStaticFieldFiller: public FieldClosure { |
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414 GrowableArray<ciField*>* _arr; |
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415 ciEnv* _curEnv; |
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416 public: |
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417 NonStaticFieldFiller(ciEnv* curEnv, GrowableArray<ciField*>* arr) : |
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418 _curEnv(curEnv), _arr(arr) |
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419 {} |
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420 void do_field(fieldDescriptor* fd) { |
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421 ciField* field = new (_curEnv->arena()) ciField(fd); |
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422 _arr->append(field); |
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423 } |
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424 }; |
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425 |
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426 GrowableArray<ciField*>* ciInstanceKlass::non_static_fields() { |
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427 if (_non_static_fields == NULL) { |
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428 VM_ENTRY_MARK; |
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429 ciEnv* curEnv = ciEnv::current(); |
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430 InstanceKlass* ik = get_instanceKlass(); |
| 3938 | 431 int max_n_fields = ik->java_fields_count(); |
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432 |
| 1685 | 433 Arena* arena = curEnv->arena(); |
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434 _non_static_fields = |
| 1685 | 435 new (arena) GrowableArray<ciField*>(arena, max_n_fields, 0, NULL); |
|
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436 NonStaticFieldFiller filler(curEnv, _non_static_fields); |
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437 ik->do_nonstatic_fields(&filler); |
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438 } |
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439 return _non_static_fields; |
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440 } |
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441 |
| 0 | 442 static int sort_field_by_offset(ciField** a, ciField** b) { |
| 443 return (*a)->offset_in_bytes() - (*b)->offset_in_bytes(); | |
| 444 // (no worries about 32-bit overflow...) | |
| 445 } | |
| 446 | |
| 447 // ------------------------------------------------------------------ | |
| 448 // ciInstanceKlass::compute_nonstatic_fields | |
| 449 int ciInstanceKlass::compute_nonstatic_fields() { | |
| 450 assert(is_loaded(), "must be loaded"); | |
| 451 | |
| 452 if (_nonstatic_fields != NULL) | |
| 453 return _nonstatic_fields->length(); | |
| 454 | |
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455 if (!has_nonstatic_fields()) { |
| 0 | 456 Arena* arena = CURRENT_ENV->arena(); |
| 457 _nonstatic_fields = new (arena) GrowableArray<ciField*>(arena, 0, 0, NULL); | |
| 458 return 0; | |
| 459 } | |
| 460 assert(!is_java_lang_Object(), "bootstrap OK"); | |
| 461 | |
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462 // Size in bytes of my fields, including inherited fields. |
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463 int fsize = nonstatic_field_size() * heapOopSize; |
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464 |
| 0 | 465 ciInstanceKlass* super = this->super(); |
| 466 GrowableArray<ciField*>* super_fields = NULL; | |
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467 if (super != NULL && super->has_nonstatic_fields()) { |
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468 int super_fsize = super->nonstatic_field_size() * heapOopSize; |
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469 int super_flen = super->nof_nonstatic_fields(); |
| 0 | 470 super_fields = super->_nonstatic_fields; |
| 471 assert(super_flen == 0 || super_fields != NULL, "first get nof_fields"); | |
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472 // See if I am no larger than my super; if so, I can use his fields. |
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473 if (fsize == super_fsize) { |
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474 _nonstatic_fields = super_fields; |
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475 return super_fields->length(); |
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476 } |
| 0 | 477 } |
| 478 | |
| 479 GrowableArray<ciField*>* fields = NULL; | |
| 480 GUARDED_VM_ENTRY({ | |
| 481 fields = compute_nonstatic_fields_impl(super_fields); | |
| 482 }); | |
| 483 | |
| 484 if (fields == NULL) { | |
| 485 // This can happen if this class (java.lang.Class) has invisible fields. | |
| 486 _nonstatic_fields = super_fields; | |
| 487 return super_fields->length(); | |
| 488 } | |
| 489 | |
| 490 int flen = fields->length(); | |
| 491 | |
| 492 // Now sort them by offset, ascending. | |
| 493 // (In principle, they could mix with superclass fields.) | |
| 494 fields->sort(sort_field_by_offset); | |
| 495 _nonstatic_fields = fields; | |
| 496 return flen; | |
| 497 } | |
| 498 | |
| 499 GrowableArray<ciField*>* | |
| 500 ciInstanceKlass::compute_nonstatic_fields_impl(GrowableArray<ciField*>* | |
| 501 super_fields) { | |
| 502 ASSERT_IN_VM; | |
| 503 Arena* arena = CURRENT_ENV->arena(); | |
| 504 int flen = 0; | |
| 505 GrowableArray<ciField*>* fields = NULL; | |
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506 InstanceKlass* k = get_instanceKlass(); |
| 3938 | 507 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
| 508 if (fs.access_flags().is_static()) continue; | |
| 509 flen += 1; | |
| 510 } | |
| 0 | 511 |
| 3938 | 512 // allocate the array: |
| 513 if (flen == 0) { | |
| 514 return NULL; // return nothing if none are locally declared | |
| 515 } | |
| 516 if (super_fields != NULL) { | |
| 517 flen += super_fields->length(); | |
| 518 } | |
| 519 fields = new (arena) GrowableArray<ciField*>(arena, flen, 0, NULL); | |
| 520 if (super_fields != NULL) { | |
| 521 fields->appendAll(super_fields); | |
| 522 } | |
| 523 | |
| 524 for (JavaFieldStream fs(k); !fs.done(); fs.next()) { | |
| 525 if (fs.access_flags().is_static()) continue; | |
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526 fieldDescriptor& fd = fs.field_descriptor(); |
| 3938 | 527 ciField* field = new (arena) ciField(&fd); |
| 528 fields->append(field); | |
| 0 | 529 } |
| 530 assert(fields->length() == flen, "sanity"); | |
| 531 return fields; | |
| 532 } | |
| 533 | |
| 534 // ------------------------------------------------------------------ | |
| 535 // ciInstanceKlass::find_method | |
| 536 // | |
| 537 // Find a method in this klass. | |
| 538 ciMethod* ciInstanceKlass::find_method(ciSymbol* name, ciSymbol* signature) { | |
| 539 VM_ENTRY_MARK; | |
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540 InstanceKlass* k = get_instanceKlass(); |
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541 Symbol* name_sym = name->get_symbol(); |
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542 Symbol* sig_sym= signature->get_symbol(); |
| 0 | 543 |
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544 Method* m = k->find_method(name_sym, sig_sym); |
| 0 | 545 if (m == NULL) return NULL; |
| 546 | |
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547 return CURRENT_THREAD_ENV->get_method(m); |
| 0 | 548 } |
| 549 | |
| 550 // ------------------------------------------------------------------ | |
| 551 // ciInstanceKlass::is_leaf_type | |
| 552 bool ciInstanceKlass::is_leaf_type() { | |
| 553 assert(is_loaded(), "must be loaded"); | |
| 554 if (is_shared()) { | |
| 555 return is_final(); // approximately correct | |
| 556 } else { | |
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557 return !_has_subklass && (nof_implementors() == 0); |
| 0 | 558 } |
| 559 } | |
| 560 | |
| 561 // ------------------------------------------------------------------ | |
| 562 // ciInstanceKlass::implementor | |
| 563 // | |
| 564 // Report an implementor of this interface. | |
| 565 // Note that there are various races here, since my copy | |
| 566 // of _nof_implementors might be out of date with respect | |
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567 // to results returned by InstanceKlass::implementor. |
| 0 | 568 // This is OK, since any dependencies we decide to assert |
| 569 // will be checked later under the Compile_lock. | |
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570 ciInstanceKlass* ciInstanceKlass::implementor() { |
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571 ciInstanceKlass* impl = _implementor; |
| 0 | 572 if (impl == NULL) { |
| 573 // Go into the VM to fetch the implementor. | |
| 574 { | |
| 575 VM_ENTRY_MARK; | |
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576 Klass* k = get_instanceKlass()->implementor(); |
| 0 | 577 if (k != NULL) { |
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578 if (k == get_instanceKlass()) { |
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579 // More than one implementors. Use 'this' in this case. |
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580 impl = this; |
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581 } else { |
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582 impl = CURRENT_THREAD_ENV->get_instance_klass(k); |
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583 } |
| 0 | 584 } |
| 585 } | |
| 586 // Memoize this result. | |
| 587 if (!is_shared()) { | |
|
5998
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588 _implementor = impl; |
| 0 | 589 } |
| 590 } | |
| 591 return impl; | |
| 592 } | |
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593 |
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594 // Utility class for printing of the contents of the static fields for |
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595 // use by compilation replay. It only prints out the information that |
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596 // could be consumed by the compiler, so for primitive types it prints |
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597 // out the actual value. For Strings it's the actual string value. |
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598 // For array types it it's first level array size since that's the |
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599 // only value which statically unchangeable. For all other reference |
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600 // types it simply prints out the dynamic type. |
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601 |
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602 class StaticFinalFieldPrinter : public FieldClosure { |
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603 outputStream* _out; |
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604 const char* _holder; |
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605 public: |
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606 StaticFinalFieldPrinter(outputStream* out, const char* holder) : |
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607 _out(out), |
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608 _holder(holder) { |
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609 } |
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610 void do_field(fieldDescriptor* fd) { |
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611 if (fd->is_final() && !fd->has_initial_value()) { |
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612 ResourceMark rm; |
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613 oop mirror = fd->field_holder()->java_mirror(); |
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614 _out->print("staticfield %s %s %s ", _holder, fd->name()->as_quoted_ascii(), fd->signature()->as_quoted_ascii()); |
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615 switch (fd->field_type()) { |
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616 case T_BYTE: _out->print_cr("%d", mirror->byte_field(fd->offset())); break; |
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617 case T_BOOLEAN: _out->print_cr("%d", mirror->bool_field(fd->offset())); break; |
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618 case T_SHORT: _out->print_cr("%d", mirror->short_field(fd->offset())); break; |
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619 case T_CHAR: _out->print_cr("%d", mirror->char_field(fd->offset())); break; |
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620 case T_INT: _out->print_cr("%d", mirror->int_field(fd->offset())); break; |
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621 case T_LONG: _out->print_cr(INT64_FORMAT, mirror->long_field(fd->offset())); break; |
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622 case T_FLOAT: { |
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623 float f = mirror->float_field(fd->offset()); |
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624 _out->print_cr("%d", *(int*)&f); |
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625 break; |
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626 } |
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627 case T_DOUBLE: { |
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628 double d = mirror->double_field(fd->offset()); |
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629 _out->print_cr(INT64_FORMAT, *(jlong*)&d); |
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630 break; |
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631 } |
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632 case T_ARRAY: { |
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633 oop value = mirror->obj_field_acquire(fd->offset()); |
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634 if (value == NULL) { |
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635 _out->print_cr("null"); |
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636 } else { |
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637 typeArrayOop ta = (typeArrayOop)value; |
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638 _out->print("%d", ta->length()); |
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639 if (value->is_objArray()) { |
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640 objArrayOop oa = (objArrayOop)value; |
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641 const char* klass_name = value->klass()->name()->as_quoted_ascii(); |
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642 _out->print(" %s", klass_name); |
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643 } |
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644 _out->cr(); |
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645 } |
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646 break; |
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647 } |
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648 case T_OBJECT: { |
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649 oop value = mirror->obj_field_acquire(fd->offset()); |
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650 if (value == NULL) { |
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651 _out->print_cr("null"); |
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652 } else if (value->is_instance()) { |
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653 if (value->is_a(SystemDictionary::String_klass())) { |
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654 _out->print("\""); |
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655 _out->print_raw(java_lang_String::as_quoted_ascii(value)); |
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656 _out->print_cr("\""); |
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657 } else { |
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658 const char* klass_name = value->klass()->name()->as_quoted_ascii(); |
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659 _out->print_cr(klass_name); |
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660 } |
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661 } else { |
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662 ShouldNotReachHere(); |
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663 } |
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664 break; |
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665 } |
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666 default: |
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667 ShouldNotReachHere(); |
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668 } |
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669 } |
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670 } |
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671 }; |
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672 |
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673 |
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674 void ciInstanceKlass::dump_replay_data(outputStream* out) { |
|
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675 ResourceMark rm; |
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676 |
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677 InstanceKlass* ik = get_instanceKlass(); |
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678 ConstantPool* cp = ik->constants(); |
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679 |
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680 // Try to record related loaded classes |
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681 Klass* sub = ik->subklass(); |
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682 while (sub != NULL) { |
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683 if (sub->oop_is_instance()) { |
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684 out->print_cr("instanceKlass %s", sub->name()->as_quoted_ascii()); |
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685 } |
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686 sub = sub->next_sibling(); |
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687 } |
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688 |
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689 // Dump out the state of the constant pool tags. During replay the |
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690 // tags will be validated for things which shouldn't change and |
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691 // classes will be resolved if the tags indicate that they were |
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692 // resolved at compile time. |
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693 out->print("ciInstanceKlass %s %d %d %d", ik->name()->as_quoted_ascii(), |
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694 is_linked(), is_initialized(), cp->length()); |
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695 for (int index = 1; index < cp->length(); index++) { |
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696 out->print(" %d", cp->tags()->at(index)); |
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697 } |
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698 out->cr(); |
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699 if (is_initialized()) { |
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700 // Dump out the static final fields in case the compilation relies |
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701 // on their value for correct replay. |
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702 StaticFinalFieldPrinter sffp(out, ik->name()->as_quoted_ascii()); |
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703 ik->do_local_static_fields(&sffp); |
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704 } |
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705 } |