class.cc revision d9c4fc94fa618617f94e1de9af5f034549100753
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "class.h" 18 19#include "art_field-inl.h" 20#include "art_method-inl.h" 21#include "class-inl.h" 22#include "class_linker.h" 23#include "class_loader.h" 24#include "dex_cache.h" 25#include "dex_file-inl.h" 26#include "gc/accounting/card_table-inl.h" 27#include "object-inl.h" 28#include "object_array-inl.h" 29#include "object_utils.h" 30#include "runtime.h" 31#include "sirt_ref.h" 32#include "thread.h" 33#include "throwable.h" 34#include "utils.h" 35#include "well_known_classes.h" 36 37namespace art { 38namespace mirror { 39 40Class* Class::java_lang_Class_ = NULL; 41 42void Class::SetClassClass(Class* java_lang_Class) { 43 CHECK(java_lang_Class_ == NULL) << java_lang_Class_ << " " << java_lang_Class; 44 CHECK(java_lang_Class != NULL); 45 java_lang_Class_ = java_lang_Class; 46} 47 48void Class::ResetClass() { 49 CHECK(java_lang_Class_ != NULL); 50 java_lang_Class_ = NULL; 51} 52 53void Class::SetStatus(Status new_status, Thread* self) { 54 Status old_status = GetStatus(); 55 bool class_linker_initialized = Runtime::Current()->GetClassLinker() != nullptr; 56 if (LIKELY(class_linker_initialized)) { 57 if (UNLIKELY(new_status <= old_status && new_status != kStatusError)) { 58 LOG(FATAL) << "Unexpected change back of class status for " << PrettyClass(this) << " " 59 << old_status << " -> " << new_status; 60 } 61 if (new_status >= kStatusResolved || old_status >= kStatusResolved) { 62 // When classes are being resolved the resolution code should hold the lock. 63 CHECK_EQ(GetLockOwnerThreadId(), self->GetThreadId()) 64 << "Attempt to change status of class while not holding its lock: " 65 << PrettyClass(this) << " " << old_status << " -> " << new_status; 66 } 67 } 68 if (new_status == kStatusError) { 69 CHECK_NE(GetStatus(), kStatusError) 70 << "Attempt to set as erroneous an already erroneous class " << PrettyClass(this); 71 72 // Stash current exception. 73 SirtRef<mirror::Object> old_throw_this_object(self, NULL); 74 SirtRef<mirror::ArtMethod> old_throw_method(self, NULL); 75 SirtRef<mirror::Throwable> old_exception(self, NULL); 76 uint32_t old_throw_dex_pc; 77 { 78 ThrowLocation old_throw_location; 79 mirror::Throwable* old_exception_obj = self->GetException(&old_throw_location); 80 old_throw_this_object.reset(old_throw_location.GetThis()); 81 old_throw_method.reset(old_throw_location.GetMethod()); 82 old_exception.reset(old_exception_obj); 83 old_throw_dex_pc = old_throw_location.GetDexPc(); 84 self->ClearException(); 85 } 86 CHECK(old_exception.get() != NULL); 87 88 // clear exception to call FindSystemClass 89 self->ClearException(); 90 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 91 Class* eiie_class = class_linker->FindSystemClass("Ljava/lang/ExceptionInInitializerError;"); 92 CHECK(!self->IsExceptionPending()); 93 94 // Only verification errors, not initialization problems, should set a verify error. 95 // This is to ensure that ThrowEarlierClassFailure will throw NoClassDefFoundError in that case. 96 Class* exception_class = old_exception->GetClass(); 97 if (!eiie_class->IsAssignableFrom(exception_class)) { 98 SetVerifyErrorClass(exception_class); 99 } 100 101 // Restore exception. 102 ThrowLocation gc_safe_throw_location(old_throw_this_object.get(), old_throw_method.get(), 103 old_throw_dex_pc); 104 105 self->SetException(gc_safe_throw_location, old_exception.get()); 106 } 107 CHECK(sizeof(Status) == sizeof(uint32_t)) << PrettyClass(this); 108 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, status_), new_status, false); 109 // Classes that are being resolved or initialized need to notify waiters that the class status 110 // changed. See ClassLinker::EnsureResolved and ClassLinker::WaitForInitializeClass. 111 if ((old_status >= kStatusResolved || new_status >= kStatusResolved) && 112 class_linker_initialized) { 113 NotifyAll(self); 114 } 115} 116 117void Class::SetDexCache(DexCache* new_dex_cache) { 118 SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), new_dex_cache, false); 119} 120 121void Class::SetClassSize(size_t new_class_size) { 122 if (kIsDebugBuild && (new_class_size < GetClassSize())) { 123 DumpClass(LOG(ERROR), kDumpClassFullDetail); 124 CHECK_GE(new_class_size, GetClassSize()) << " class=" << PrettyTypeOf(this); 125 } 126 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, class_size_), new_class_size, false); 127} 128 129// Return the class' name. The exact format is bizarre, but it's the specified behavior for 130// Class.getName: keywords for primitive types, regular "[I" form for primitive arrays (so "int" 131// but "[I"), and arrays of reference types written between "L" and ";" but with dots rather than 132// slashes (so "java.lang.String" but "[Ljava.lang.String;"). Madness. 133String* Class::ComputeName() { 134 String* name = GetName(); 135 if (name != NULL) { 136 return name; 137 } 138 std::string descriptor(ClassHelper(this).GetDescriptorAsStringPiece().as_string()); 139 if ((descriptor[0] != 'L') && (descriptor[0] != '[')) { 140 // The descriptor indicates that this is the class for 141 // a primitive type; special-case the return value. 142 const char* c_name = NULL; 143 switch (descriptor[0]) { 144 case 'Z': c_name = "boolean"; break; 145 case 'B': c_name = "byte"; break; 146 case 'C': c_name = "char"; break; 147 case 'S': c_name = "short"; break; 148 case 'I': c_name = "int"; break; 149 case 'J': c_name = "long"; break; 150 case 'F': c_name = "float"; break; 151 case 'D': c_name = "double"; break; 152 case 'V': c_name = "void"; break; 153 default: 154 LOG(FATAL) << "Unknown primitive type: " << PrintableChar(descriptor[0]); 155 } 156 name = String::AllocFromModifiedUtf8(Thread::Current(), c_name); 157 } else { 158 // Convert the UTF-8 name to a java.lang.String. The name must use '.' to separate package 159 // components. 160 if (descriptor.size() > 2 && descriptor[0] == 'L' && descriptor[descriptor.size() - 1] == ';') { 161 descriptor.erase(0, 1); 162 descriptor.erase(descriptor.size() - 1); 163 } 164 std::replace(descriptor.begin(), descriptor.end(), '/', '.'); 165 name = String::AllocFromModifiedUtf8(Thread::Current(), descriptor.c_str()); 166 } 167 SetName(name); 168 return name; 169} 170 171void Class::DumpClass(std::ostream& os, int flags) const { 172 if ((flags & kDumpClassFullDetail) == 0) { 173 os << PrettyClass(this); 174 if ((flags & kDumpClassClassLoader) != 0) { 175 os << ' ' << GetClassLoader(); 176 } 177 if ((flags & kDumpClassInitialized) != 0) { 178 os << ' ' << GetStatus(); 179 } 180 os << "\n"; 181 return; 182 } 183 184 Class* super = GetSuperClass(); 185 ClassHelper kh(this); 186 os << "----- " << (IsInterface() ? "interface" : "class") << " " 187 << "'" << kh.GetDescriptor() << "' cl=" << GetClassLoader() << " -----\n", 188 os << " objectSize=" << SizeOf() << " " 189 << "(" << (super != NULL ? super->SizeOf() : -1) << " from super)\n", 190 os << StringPrintf(" access=0x%04x.%04x\n", 191 GetAccessFlags() >> 16, GetAccessFlags() & kAccJavaFlagsMask); 192 if (super != NULL) { 193 os << " super='" << PrettyClass(super) << "' (cl=" << super->GetClassLoader() << ")\n"; 194 } 195 if (IsArrayClass()) { 196 os << " componentType=" << PrettyClass(GetComponentType()) << "\n"; 197 } 198 if (kh.NumDirectInterfaces() > 0) { 199 os << " interfaces (" << kh.NumDirectInterfaces() << "):\n"; 200 for (size_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 201 Class* interface = kh.GetDirectInterface(i); 202 const ClassLoader* cl = interface->GetClassLoader(); 203 os << StringPrintf(" %2zd: %s (cl=%p)\n", i, PrettyClass(interface).c_str(), cl); 204 } 205 } 206 os << " vtable (" << NumVirtualMethods() << " entries, " 207 << (super != NULL ? super->NumVirtualMethods() : 0) << " in super):\n"; 208 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 209 os << StringPrintf(" %2zd: %s\n", i, PrettyMethod(GetVirtualMethodDuringLinking(i)).c_str()); 210 } 211 os << " direct methods (" << NumDirectMethods() << " entries):\n"; 212 for (size_t i = 0; i < NumDirectMethods(); ++i) { 213 os << StringPrintf(" %2zd: %s\n", i, PrettyMethod(GetDirectMethod(i)).c_str()); 214 } 215 if (NumStaticFields() > 0) { 216 os << " static fields (" << NumStaticFields() << " entries):\n"; 217 if (IsResolved() || IsErroneous()) { 218 for (size_t i = 0; i < NumStaticFields(); ++i) { 219 os << StringPrintf(" %2zd: %s\n", i, PrettyField(GetStaticField(i)).c_str()); 220 } 221 } else { 222 os << " <not yet available>"; 223 } 224 } 225 if (NumInstanceFields() > 0) { 226 os << " instance fields (" << NumInstanceFields() << " entries):\n"; 227 if (IsResolved() || IsErroneous()) { 228 for (size_t i = 0; i < NumInstanceFields(); ++i) { 229 os << StringPrintf(" %2zd: %s\n", i, PrettyField(GetInstanceField(i)).c_str()); 230 } 231 } else { 232 os << " <not yet available>"; 233 } 234 } 235} 236 237void Class::SetReferenceInstanceOffsets(uint32_t new_reference_offsets) { 238 if (new_reference_offsets != CLASS_WALK_SUPER) { 239 // Sanity check that the number of bits set in the reference offset bitmap 240 // agrees with the number of references 241 size_t count = 0; 242 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 243 count += c->NumReferenceInstanceFieldsDuringLinking(); 244 } 245 CHECK_EQ((size_t)__builtin_popcount(new_reference_offsets), count); 246 } 247 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, reference_instance_offsets_), 248 new_reference_offsets, false); 249} 250 251void Class::SetReferenceStaticOffsets(uint32_t new_reference_offsets) { 252 if (new_reference_offsets != CLASS_WALK_SUPER) { 253 // Sanity check that the number of bits set in the reference offset bitmap 254 // agrees with the number of references 255 CHECK_EQ((size_t)__builtin_popcount(new_reference_offsets), 256 NumReferenceStaticFieldsDuringLinking()); 257 } 258 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, reference_static_offsets_), 259 new_reference_offsets, false); 260} 261 262bool Class::IsInSamePackage(const StringPiece& descriptor1, const StringPiece& descriptor2) { 263 size_t i = 0; 264 while (descriptor1[i] != '\0' && descriptor1[i] == descriptor2[i]) { 265 ++i; 266 } 267 if (descriptor1.find('/', i) != StringPiece::npos || 268 descriptor2.find('/', i) != StringPiece::npos) { 269 return false; 270 } else { 271 return true; 272 } 273} 274 275bool Class::IsInSamePackage(const Class* that) const { 276 const Class* klass1 = this; 277 const Class* klass2 = that; 278 if (klass1 == klass2) { 279 return true; 280 } 281 // Class loaders must match. 282 if (klass1->GetClassLoader() != klass2->GetClassLoader()) { 283 return false; 284 } 285 // Arrays are in the same package when their element classes are. 286 while (klass1->IsArrayClass()) { 287 klass1 = klass1->GetComponentType(); 288 } 289 while (klass2->IsArrayClass()) { 290 klass2 = klass2->GetComponentType(); 291 } 292 // trivial check again for array types 293 if (klass1 == klass2) { 294 return true; 295 } 296 // Compare the package part of the descriptor string. 297 return IsInSamePackage(ClassHelper(klass1).GetDescriptorAsStringPiece(), 298 ClassHelper(klass2).GetDescriptorAsStringPiece()); 299} 300 301bool Class::IsClassClass() const { 302 Class* java_lang_Class = GetClass()->GetClass(); 303 return this == java_lang_Class; 304} 305 306bool Class::IsStringClass() const { 307 return this == String::GetJavaLangString(); 308} 309 310bool Class::IsThrowableClass() const { 311 return WellKnownClasses::ToClass(WellKnownClasses::java_lang_Throwable)->IsAssignableFrom(this); 312} 313 314bool Class::IsArtFieldClass() const { 315 Class* java_lang_Class = GetClass(); 316 Class* java_lang_reflect_ArtField = java_lang_Class->GetInstanceField(0)->GetClass(); 317 return this == java_lang_reflect_ArtField; 318} 319 320bool Class::IsArtMethodClass() const { 321 return this == ArtMethod::GetJavaLangReflectArtMethod(); 322} 323 324void Class::SetClassLoader(ClassLoader* new_class_loader) { 325 SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader, false); 326} 327 328ArtMethod* Class::FindInterfaceMethod(const StringPiece& name, const Signature& signature) const { 329 // Check the current class before checking the interfaces. 330 ArtMethod* method = FindDeclaredVirtualMethod(name, signature); 331 if (method != NULL) { 332 return method; 333 } 334 335 int32_t iftable_count = GetIfTableCount(); 336 IfTable* iftable = GetIfTable(); 337 for (int32_t i = 0; i < iftable_count; i++) { 338 method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature); 339 if (method != NULL) { 340 return method; 341 } 342 } 343 return NULL; 344} 345 346ArtMethod* Class::FindInterfaceMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const { 347 // Check the current class before checking the interfaces. 348 ArtMethod* method = FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 349 if (method != NULL) { 350 return method; 351 } 352 353 int32_t iftable_count = GetIfTableCount(); 354 IfTable* iftable = GetIfTable(); 355 for (int32_t i = 0; i < iftable_count; i++) { 356 method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 357 if (method != NULL) { 358 return method; 359 } 360 } 361 return NULL; 362} 363 364ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const StringPiece& signature) const { 365 MethodHelper mh; 366 for (size_t i = 0; i < NumDirectMethods(); ++i) { 367 ArtMethod* method = GetDirectMethod(i); 368 mh.ChangeMethod(method); 369 if (name == mh.GetNameAsStringPiece() && mh.GetSignature() == signature) { 370 return method; 371 } 372 } 373 return NULL; 374} 375 376ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const Signature& signature) const { 377 MethodHelper mh; 378 for (size_t i = 0; i < NumDirectMethods(); ++i) { 379 ArtMethod* method = GetDirectMethod(i); 380 mh.ChangeMethod(method); 381 if (name == mh.GetNameAsStringPiece() && signature == mh.GetSignature()) { 382 return method; 383 } 384 } 385 return NULL; 386} 387 388ArtMethod* Class::FindDeclaredDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const { 389 if (GetDexCache() == dex_cache) { 390 for (size_t i = 0; i < NumDirectMethods(); ++i) { 391 ArtMethod* method = GetDirectMethod(i); 392 if (method->GetDexMethodIndex() == dex_method_idx) { 393 return method; 394 } 395 } 396 } 397 return NULL; 398} 399 400ArtMethod* Class::FindDirectMethod(const StringPiece& name, const StringPiece& signature) const { 401 for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 402 ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature); 403 if (method != NULL) { 404 return method; 405 } 406 } 407 return NULL; 408} 409 410ArtMethod* Class::FindDirectMethod(const StringPiece& name, const Signature& signature) const { 411 for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 412 ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature); 413 if (method != NULL) { 414 return method; 415 } 416 } 417 return NULL; 418} 419 420ArtMethod* Class::FindDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const { 421 for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 422 ArtMethod* method = klass->FindDeclaredDirectMethod(dex_cache, dex_method_idx); 423 if (method != NULL) { 424 return method; 425 } 426 } 427 return NULL; 428} 429 430ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, const StringPiece& signature) const { 431 MethodHelper mh; 432 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 433 ArtMethod* method = GetVirtualMethod(i); 434 mh.ChangeMethod(method); 435 if (name == mh.GetNameAsStringPiece() && mh.GetSignature() == signature) { 436 return method; 437 } 438 } 439 return NULL; 440} 441 442ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, 443 const Signature& signature) const { 444 MethodHelper mh; 445 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 446 ArtMethod* method = GetVirtualMethod(i); 447 mh.ChangeMethod(method); 448 if (name == mh.GetNameAsStringPiece() && signature == mh.GetSignature()) { 449 return method; 450 } 451 } 452 return NULL; 453} 454 455ArtMethod* Class::FindDeclaredVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const { 456 if (GetDexCache() == dex_cache) { 457 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 458 ArtMethod* method = GetVirtualMethod(i); 459 if (method->GetDexMethodIndex() == dex_method_idx) { 460 return method; 461 } 462 } 463 } 464 return NULL; 465} 466 467ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const StringPiece& signature) const { 468 for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 469 ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); 470 if (method != NULL) { 471 return method; 472 } 473 } 474 return NULL; 475} 476 477ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const Signature& signature) const { 478 for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 479 ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); 480 if (method != NULL) { 481 return method; 482 } 483 } 484 return NULL; 485} 486 487ArtMethod* Class::FindVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) const { 488 for (const Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 489 ArtMethod* method = klass->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 490 if (method != NULL) { 491 return method; 492 } 493 } 494 return NULL; 495} 496 497ArtMethod* Class::FindClassInitializer() const { 498 for (size_t i = 0; i < NumDirectMethods(); ++i) { 499 ArtMethod* method = GetDirectMethod(i); 500 if (method->IsConstructor() && method->IsStatic()) { 501 if (kIsDebugBuild) { 502 MethodHelper mh(method); 503 CHECK_STREQ(mh.GetName(), "<clinit>"); 504 CHECK_STREQ(mh.GetSignature().ToString().c_str(), "()V"); 505 } 506 return method; 507 } 508 } 509 return NULL; 510} 511 512ArtField* Class::FindDeclaredInstanceField(const StringPiece& name, const StringPiece& type) { 513 // Is the field in this class? 514 // Interfaces are not relevant because they can't contain instance fields. 515 FieldHelper fh; 516 for (size_t i = 0; i < NumInstanceFields(); ++i) { 517 ArtField* f = GetInstanceField(i); 518 fh.ChangeField(f); 519 if (name == fh.GetNameAsStringPiece() && type == fh.GetTypeDescriptorAsStringPiece()) { 520 return f; 521 } 522 } 523 return NULL; 524} 525 526ArtField* Class::FindDeclaredInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) { 527 if (GetDexCache() == dex_cache) { 528 for (size_t i = 0; i < NumInstanceFields(); ++i) { 529 ArtField* f = GetInstanceField(i); 530 if (f->GetDexFieldIndex() == dex_field_idx) { 531 return f; 532 } 533 } 534 } 535 return NULL; 536} 537 538ArtField* Class::FindInstanceField(const StringPiece& name, const StringPiece& type) { 539 // Is the field in this class, or any of its superclasses? 540 // Interfaces are not relevant because they can't contain instance fields. 541 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 542 ArtField* f = c->FindDeclaredInstanceField(name, type); 543 if (f != NULL) { 544 return f; 545 } 546 } 547 return NULL; 548} 549 550ArtField* Class::FindInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) { 551 // Is the field in this class, or any of its superclasses? 552 // Interfaces are not relevant because they can't contain instance fields. 553 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 554 ArtField* f = c->FindDeclaredInstanceField(dex_cache, dex_field_idx); 555 if (f != NULL) { 556 return f; 557 } 558 } 559 return NULL; 560} 561 562ArtField* Class::FindDeclaredStaticField(const StringPiece& name, const StringPiece& type) { 563 DCHECK(type != NULL); 564 FieldHelper fh; 565 for (size_t i = 0; i < NumStaticFields(); ++i) { 566 ArtField* f = GetStaticField(i); 567 fh.ChangeField(f); 568 if (name == fh.GetNameAsStringPiece() && type == fh.GetTypeDescriptorAsStringPiece()) { 569 return f; 570 } 571 } 572 return NULL; 573} 574 575ArtField* Class::FindDeclaredStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) { 576 if (dex_cache == GetDexCache()) { 577 for (size_t i = 0; i < NumStaticFields(); ++i) { 578 ArtField* f = GetStaticField(i); 579 if (f->GetDexFieldIndex() == dex_field_idx) { 580 return f; 581 } 582 } 583 } 584 return NULL; 585} 586 587ArtField* Class::FindStaticField(const StringPiece& name, const StringPiece& type) { 588 // Is the field in this class (or its interfaces), or any of its 589 // superclasses (or their interfaces)? 590 ClassHelper kh; 591 for (Class* k = this; k != NULL; k = k->GetSuperClass()) { 592 // Is the field in this class? 593 ArtField* f = k->FindDeclaredStaticField(name, type); 594 if (f != NULL) { 595 return f; 596 } 597 // Is this field in any of this class' interfaces? 598 kh.ChangeClass(k); 599 for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 600 Class* interface = kh.GetDirectInterface(i); 601 f = interface->FindStaticField(name, type); 602 if (f != NULL) { 603 return f; 604 } 605 } 606 } 607 return NULL; 608} 609 610ArtField* Class::FindStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) { 611 ClassHelper kh; 612 for (Class* k = this; k != NULL; k = k->GetSuperClass()) { 613 // Is the field in this class? 614 ArtField* f = k->FindDeclaredStaticField(dex_cache, dex_field_idx); 615 if (f != NULL) { 616 return f; 617 } 618 // Is this field in any of this class' interfaces? 619 kh.ChangeClass(k); 620 for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 621 Class* interface = kh.GetDirectInterface(i); 622 f = interface->FindStaticField(dex_cache, dex_field_idx); 623 if (f != NULL) { 624 return f; 625 } 626 } 627 } 628 return NULL; 629} 630 631ArtField* Class::FindField(const StringPiece& name, const StringPiece& type) { 632 // Find a field using the JLS field resolution order 633 ClassHelper kh; 634 for (Class* k = this; k != NULL; k = k->GetSuperClass()) { 635 // Is the field in this class? 636 ArtField* f = k->FindDeclaredInstanceField(name, type); 637 if (f != NULL) { 638 return f; 639 } 640 f = k->FindDeclaredStaticField(name, type); 641 if (f != NULL) { 642 return f; 643 } 644 // Is this field in any of this class' interfaces? 645 kh.ChangeClass(k); 646 for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 647 Class* interface = kh.GetDirectInterface(i); 648 f = interface->FindStaticField(name, type); 649 if (f != NULL) { 650 return f; 651 } 652 } 653 } 654 return NULL; 655} 656 657static void SetPreverifiedFlagOnMethods(mirror::ObjectArray<mirror::ArtMethod>* methods) 658 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 659 if (methods != NULL) { 660 for (int32_t index = 0, end = methods->GetLength(); index < end; ++index) { 661 mirror::ArtMethod* method = methods->GetWithoutChecks(index); 662 DCHECK(method != NULL); 663 method->SetPreverified(); 664 } 665 } 666} 667 668void Class::SetPreverifiedFlagOnAllMethods() { 669 DCHECK(IsVerified()); 670 SetPreverifiedFlagOnMethods(GetDirectMethods()); 671 SetPreverifiedFlagOnMethods(GetVirtualMethods()); 672} 673 674} // namespace mirror 675} // namespace art 676