class.cc revision bfd9a4378eacaf2dc2bbe05ad48c5164fc93c9fe
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 "handle_scope-inl.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::VisitRoots(RootCallback* callback, void* arg) { 54 if (java_lang_Class_ != nullptr) { 55 callback(reinterpret_cast<mirror::Object**>(&java_lang_Class_), arg, 0, kRootStickyClass); 56 } 57} 58 59void Class::SetStatus(Status new_status, Thread* self) { 60 Status old_status = GetStatus(); 61 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 62 bool class_linker_initialized = class_linker != nullptr && class_linker->IsInitialized(); 63 if (LIKELY(class_linker_initialized)) { 64 if (UNLIKELY(new_status <= old_status && new_status != kStatusError)) { 65 LOG(FATAL) << "Unexpected change back of class status for " << PrettyClass(this) << " " 66 << old_status << " -> " << new_status; 67 } 68 if (new_status >= kStatusResolved || old_status >= kStatusResolved) { 69 // When classes are being resolved the resolution code should hold the lock. 70 CHECK_EQ(GetLockOwnerThreadId(), self->GetThreadId()) 71 << "Attempt to change status of class while not holding its lock: " 72 << PrettyClass(this) << " " << old_status << " -> " << new_status; 73 } 74 } 75 if (UNLIKELY(new_status == kStatusError)) { 76 CHECK_NE(GetStatus(), kStatusError) 77 << "Attempt to set as erroneous an already erroneous class " << PrettyClass(this); 78 79 // Stash current exception. 80 StackHandleScope<3> hs(self); 81 ThrowLocation old_throw_location; 82 Handle<mirror::Throwable> old_exception(hs.NewHandle(self->GetException(&old_throw_location))); 83 CHECK(old_exception.Get() != nullptr); 84 Handle<mirror::Object> old_throw_this_object(hs.NewHandle(old_throw_location.GetThis())); 85 Handle<mirror::ArtMethod> old_throw_method(hs.NewHandle(old_throw_location.GetMethod())); 86 uint32_t old_throw_dex_pc = old_throw_location.GetDexPc(); 87 88 // clear exception to call FindSystemClass 89 self->ClearException(); 90 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 91 Class* eiie_class = class_linker->FindSystemClass(self, 92 "Ljava/lang/ExceptionInInitializerError;"); 93 CHECK(!self->IsExceptionPending()); 94 95 // Only verification errors, not initialization problems, should set a verify error. 96 // This is to ensure that ThrowEarlierClassFailure will throw NoClassDefFoundError in that case. 97 Class* exception_class = old_exception->GetClass(); 98 if (!eiie_class->IsAssignableFrom(exception_class)) { 99 SetVerifyErrorClass(exception_class); 100 } 101 102 // Restore exception. 103 ThrowLocation gc_safe_throw_location(old_throw_this_object.Get(), old_throw_method.Get(), 104 old_throw_dex_pc); 105 106 self->SetException(gc_safe_throw_location, old_exception.Get()); 107 } 108 COMPILE_ASSERT(sizeof(Status) == sizeof(uint32_t), size_of_status_not_uint32); 109 if (Runtime::Current()->IsActiveTransaction()) { 110 SetField32Volatile<true>(OFFSET_OF_OBJECT_MEMBER(Class, status_), new_status); 111 } else { 112 SetField32Volatile<false>(OFFSET_OF_OBJECT_MEMBER(Class, status_), new_status); 113 } 114 // Classes that are being resolved or initialized need to notify waiters that the class status 115 // changed. See ClassLinker::EnsureResolved and ClassLinker::WaitForInitializeClass. 116 if ((old_status >= kStatusResolved || new_status >= kStatusResolved) && 117 class_linker_initialized) { 118 NotifyAll(self); 119 } 120} 121 122void Class::SetDexCache(DexCache* new_dex_cache) { 123 SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), new_dex_cache); 124} 125 126void Class::SetClassSize(uint32_t new_class_size) { 127 if (kIsDebugBuild && (new_class_size < GetClassSize())) { 128 DumpClass(LOG(ERROR), kDumpClassFullDetail); 129 CHECK_GE(new_class_size, GetClassSize()) << " class=" << PrettyTypeOf(this); 130 } 131 // Not called within a transaction. 132 SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, class_size_), new_class_size); 133} 134 135// Return the class' name. The exact format is bizarre, but it's the specified behavior for 136// Class.getName: keywords for primitive types, regular "[I" form for primitive arrays (so "int" 137// but "[I"), and arrays of reference types written between "L" and ";" but with dots rather than 138// slashes (so "java.lang.String" but "[Ljava.lang.String;"). Madness. 139String* Class::ComputeName(Handle<Class> h_this) { 140 String* name = h_this->GetName(); 141 if (name != nullptr) { 142 return name; 143 } 144 std::string descriptor(h_this->GetDescriptor()); 145 Thread* self = Thread::Current(); 146 if ((descriptor[0] != 'L') && (descriptor[0] != '[')) { 147 // The descriptor indicates that this is the class for 148 // a primitive type; special-case the return value. 149 const char* c_name = NULL; 150 switch (descriptor[0]) { 151 case 'Z': c_name = "boolean"; break; 152 case 'B': c_name = "byte"; break; 153 case 'C': c_name = "char"; break; 154 case 'S': c_name = "short"; break; 155 case 'I': c_name = "int"; break; 156 case 'J': c_name = "long"; break; 157 case 'F': c_name = "float"; break; 158 case 'D': c_name = "double"; break; 159 case 'V': c_name = "void"; break; 160 default: 161 LOG(FATAL) << "Unknown primitive type: " << PrintableChar(descriptor[0]); 162 } 163 name = String::AllocFromModifiedUtf8(self, c_name); 164 } else { 165 // Convert the UTF-8 name to a java.lang.String. The name must use '.' to separate package 166 // components. 167 if (descriptor.size() > 2 && descriptor[0] == 'L' && descriptor[descriptor.size() - 1] == ';') { 168 descriptor.erase(0, 1); 169 descriptor.erase(descriptor.size() - 1); 170 } 171 std::replace(descriptor.begin(), descriptor.end(), '/', '.'); 172 name = String::AllocFromModifiedUtf8(self, descriptor.c_str()); 173 } 174 h_this->SetName(name); 175 return name; 176} 177 178void Class::DumpClass(std::ostream& os, int flags) { 179 if ((flags & kDumpClassFullDetail) == 0) { 180 os << PrettyClass(this); 181 if ((flags & kDumpClassClassLoader) != 0) { 182 os << ' ' << GetClassLoader(); 183 } 184 if ((flags & kDumpClassInitialized) != 0) { 185 os << ' ' << GetStatus(); 186 } 187 os << "\n"; 188 return; 189 } 190 191 Thread* self = Thread::Current(); 192 StackHandleScope<2> hs(self); 193 Handle<mirror::Class> h_this(hs.NewHandle(this)); 194 Handle<mirror::Class> h_super(hs.NewHandle(GetSuperClass())); 195 196 os << "----- " << (IsInterface() ? "interface" : "class") << " " 197 << "'" << GetDescriptor() << "' cl=" << GetClassLoader() << " -----\n", 198 os << " objectSize=" << SizeOf() << " " 199 << "(" << (h_super.Get() != NULL ? h_super->SizeOf() : -1) << " from super)\n", 200 os << StringPrintf(" access=0x%04x.%04x\n", 201 GetAccessFlags() >> 16, GetAccessFlags() & kAccJavaFlagsMask); 202 if (h_super.Get() != NULL) { 203 os << " super='" << PrettyClass(h_super.Get()) << "' (cl=" << h_super->GetClassLoader() 204 << ")\n"; 205 } 206 if (IsArrayClass()) { 207 os << " componentType=" << PrettyClass(GetComponentType()) << "\n"; 208 } 209 const size_t num_direct_interfaces = NumDirectInterfaces(); 210 if (num_direct_interfaces > 0) { 211 os << " interfaces (" << num_direct_interfaces << "):\n"; 212 for (size_t i = 0; i < num_direct_interfaces; ++i) { 213 Class* interface = GetDirectInterface(self, h_this, i); 214 const ClassLoader* cl = interface->GetClassLoader(); 215 os << StringPrintf(" %2zd: %s (cl=%p)\n", i, PrettyClass(interface).c_str(), cl); 216 } 217 } 218 // After this point, this may have moved due to GetDirectInterface. 219 os << " vtable (" << h_this->NumVirtualMethods() << " entries, " 220 << (h_super.Get() != NULL ? h_super->NumVirtualMethods() : 0) << " in super):\n"; 221 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 222 os << StringPrintf(" %2zd: %s\n", i, 223 PrettyMethod(h_this->GetVirtualMethodDuringLinking(i)).c_str()); 224 } 225 os << " direct methods (" << h_this->NumDirectMethods() << " entries):\n"; 226 for (size_t i = 0; i < h_this->NumDirectMethods(); ++i) { 227 os << StringPrintf(" %2zd: %s\n", i, PrettyMethod(h_this->GetDirectMethod(i)).c_str()); 228 } 229 if (h_this->NumStaticFields() > 0) { 230 os << " static fields (" << h_this->NumStaticFields() << " entries):\n"; 231 if (h_this->IsResolved() || h_this->IsErroneous()) { 232 for (size_t i = 0; i < h_this->NumStaticFields(); ++i) { 233 os << StringPrintf(" %2zd: %s\n", i, PrettyField(h_this->GetStaticField(i)).c_str()); 234 } 235 } else { 236 os << " <not yet available>"; 237 } 238 } 239 if (h_this->NumInstanceFields() > 0) { 240 os << " instance fields (" << h_this->NumInstanceFields() << " entries):\n"; 241 if (h_this->IsResolved() || h_this->IsErroneous()) { 242 for (size_t i = 0; i < h_this->NumInstanceFields(); ++i) { 243 os << StringPrintf(" %2zd: %s\n", i, PrettyField(h_this->GetInstanceField(i)).c_str()); 244 } 245 } else { 246 os << " <not yet available>"; 247 } 248 } 249} 250 251void Class::SetReferenceInstanceOffsets(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 size_t count = 0; 256 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 257 count += c->NumReferenceInstanceFieldsDuringLinking(); 258 } 259 CHECK_EQ((size_t)POPCOUNT(new_reference_offsets), count); 260 } 261 // Not called within a transaction. 262 SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, reference_instance_offsets_), 263 new_reference_offsets); 264} 265 266void Class::SetReferenceStaticOffsets(uint32_t new_reference_offsets) { 267 if (new_reference_offsets != CLASS_WALK_SUPER) { 268 // Sanity check that the number of bits set in the reference offset bitmap 269 // agrees with the number of references 270 CHECK_EQ((size_t)POPCOUNT(new_reference_offsets), 271 NumReferenceStaticFieldsDuringLinking()); 272 } 273 // Not called within a transaction. 274 SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, reference_static_offsets_), 275 new_reference_offsets); 276} 277 278bool Class::IsInSamePackage(const StringPiece& descriptor1, const StringPiece& descriptor2) { 279 size_t i = 0; 280 while (descriptor1[i] != '\0' && descriptor1[i] == descriptor2[i]) { 281 ++i; 282 } 283 if (descriptor1.find('/', i) != StringPiece::npos || 284 descriptor2.find('/', i) != StringPiece::npos) { 285 return false; 286 } else { 287 return true; 288 } 289} 290 291bool Class::IsInSamePackage(Class* that) { 292 Class* klass1 = this; 293 Class* klass2 = that; 294 if (klass1 == klass2) { 295 return true; 296 } 297 // Class loaders must match. 298 if (klass1->GetClassLoader() != klass2->GetClassLoader()) { 299 return false; 300 } 301 // Arrays are in the same package when their element classes are. 302 while (klass1->IsArrayClass()) { 303 klass1 = klass1->GetComponentType(); 304 } 305 while (klass2->IsArrayClass()) { 306 klass2 = klass2->GetComponentType(); 307 } 308 // trivial check again for array types 309 if (klass1 == klass2) { 310 return true; 311 } 312 // Compare the package part of the descriptor string. 313 return IsInSamePackage(klass1->GetDescriptor().c_str(), klass2->GetDescriptor().c_str()); 314} 315 316bool Class::IsStringClass() const { 317 return this == String::GetJavaLangString(); 318} 319 320bool Class::IsThrowableClass() { 321 return WellKnownClasses::ToClass(WellKnownClasses::java_lang_Throwable)->IsAssignableFrom(this); 322} 323 324void Class::SetClassLoader(ClassLoader* new_class_loader) { 325 if (Runtime::Current()->IsActiveTransaction()) { 326 SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader); 327 } else { 328 SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader); 329 } 330} 331 332ArtMethod* Class::FindInterfaceMethod(const StringPiece& name, const Signature& signature) { 333 // Check the current class before checking the interfaces. 334 ArtMethod* method = FindDeclaredVirtualMethod(name, signature); 335 if (method != NULL) { 336 return method; 337 } 338 339 int32_t iftable_count = GetIfTableCount(); 340 IfTable* iftable = GetIfTable(); 341 for (int32_t i = 0; i < iftable_count; i++) { 342 method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature); 343 if (method != NULL) { 344 return method; 345 } 346 } 347 return NULL; 348} 349 350ArtMethod* Class::FindInterfaceMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 351 // Check the current class before checking the interfaces. 352 ArtMethod* method = FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 353 if (method != NULL) { 354 return method; 355 } 356 357 int32_t iftable_count = GetIfTableCount(); 358 IfTable* iftable = GetIfTable(); 359 for (int32_t i = 0; i < iftable_count; i++) { 360 method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 361 if (method != NULL) { 362 return method; 363 } 364 } 365 return NULL; 366} 367 368ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const StringPiece& signature) { 369 for (size_t i = 0; i < NumDirectMethods(); ++i) { 370 ArtMethod* method = GetDirectMethod(i); 371 if (name == method->GetName() && method->GetSignature() == signature) { 372 return method; 373 } 374 } 375 return NULL; 376} 377 378ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const Signature& signature) { 379 for (size_t i = 0; i < NumDirectMethods(); ++i) { 380 ArtMethod* method = GetDirectMethod(i); 381 if (name == method->GetName() && signature == method->GetSignature()) { 382 return method; 383 } 384 } 385 return NULL; 386} 387 388ArtMethod* Class::FindDeclaredDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 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) { 401 for (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) { 411 for (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) { 421 for (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) { 431 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 432 ArtMethod* method = GetVirtualMethod(i); 433 if (name == method->GetName() && method->GetSignature() == signature) { 434 return method; 435 } 436 } 437 return NULL; 438} 439 440ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, const Signature& signature) { 441 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 442 ArtMethod* method = GetVirtualMethod(i); 443 if (name == method->GetName() && signature == method->GetSignature()) { 444 return method; 445 } 446 } 447 return NULL; 448} 449 450ArtMethod* Class::FindDeclaredVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 451 if (GetDexCache() == dex_cache) { 452 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 453 ArtMethod* method = GetVirtualMethod(i); 454 if (method->GetDexMethodIndex() == dex_method_idx) { 455 return method; 456 } 457 } 458 } 459 return NULL; 460} 461 462ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const StringPiece& signature) { 463 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 464 ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); 465 if (method != NULL) { 466 return method; 467 } 468 } 469 return NULL; 470} 471 472ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const Signature& signature) { 473 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 474 ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); 475 if (method != NULL) { 476 return method; 477 } 478 } 479 return NULL; 480} 481 482ArtMethod* Class::FindVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 483 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 484 ArtMethod* method = klass->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 485 if (method != NULL) { 486 return method; 487 } 488 } 489 return NULL; 490} 491 492ArtMethod* Class::FindClassInitializer() { 493 for (size_t i = 0; i < NumDirectMethods(); ++i) { 494 ArtMethod* method = GetDirectMethod(i); 495 if (method->IsClassInitializer()) { 496 DCHECK_STREQ(method->GetName(), "<clinit>"); 497 DCHECK_STREQ(method->GetSignature().ToString().c_str(), "()V"); 498 return method; 499 } 500 } 501 return NULL; 502} 503 504ArtField* Class::FindDeclaredInstanceField(const StringPiece& name, const StringPiece& type) { 505 // Is the field in this class? 506 // Interfaces are not relevant because they can't contain instance fields. 507 for (size_t i = 0; i < NumInstanceFields(); ++i) { 508 ArtField* f = GetInstanceField(i); 509 if (name == f->GetName() && type == f->GetTypeDescriptor()) { 510 return f; 511 } 512 } 513 return NULL; 514} 515 516ArtField* Class::FindDeclaredInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) { 517 if (GetDexCache() == dex_cache) { 518 for (size_t i = 0; i < NumInstanceFields(); ++i) { 519 ArtField* f = GetInstanceField(i); 520 if (f->GetDexFieldIndex() == dex_field_idx) { 521 return f; 522 } 523 } 524 } 525 return NULL; 526} 527 528ArtField* Class::FindInstanceField(const StringPiece& name, const StringPiece& type) { 529 // Is the field in this class, or any of its superclasses? 530 // Interfaces are not relevant because they can't contain instance fields. 531 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 532 ArtField* f = c->FindDeclaredInstanceField(name, type); 533 if (f != NULL) { 534 return f; 535 } 536 } 537 return NULL; 538} 539 540ArtField* Class::FindInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) { 541 // Is the field in this class, or any of its superclasses? 542 // Interfaces are not relevant because they can't contain instance fields. 543 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 544 ArtField* f = c->FindDeclaredInstanceField(dex_cache, dex_field_idx); 545 if (f != NULL) { 546 return f; 547 } 548 } 549 return NULL; 550} 551 552ArtField* Class::FindDeclaredStaticField(const StringPiece& name, const StringPiece& type) { 553 DCHECK(type != NULL); 554 for (size_t i = 0; i < NumStaticFields(); ++i) { 555 ArtField* f = GetStaticField(i); 556 if (name == f->GetName() && type == f->GetTypeDescriptor()) { 557 return f; 558 } 559 } 560 return NULL; 561} 562 563ArtField* Class::FindDeclaredStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) { 564 if (dex_cache == GetDexCache()) { 565 for (size_t i = 0; i < NumStaticFields(); ++i) { 566 ArtField* f = GetStaticField(i); 567 if (f->GetDexFieldIndex() == dex_field_idx) { 568 return f; 569 } 570 } 571 } 572 return NULL; 573} 574 575ArtField* Class::FindStaticField(Thread* self, Handle<Class> klass, const StringPiece& name, 576 const StringPiece& type) { 577 // Is the field in this class (or its interfaces), or any of its 578 // superclasses (or their interfaces)? 579 for (Class* k = klass.Get(); k != nullptr; k = k->GetSuperClass()) { 580 // Is the field in this class? 581 ArtField* f = k->FindDeclaredStaticField(name, type); 582 if (f != nullptr) { 583 return f; 584 } 585 // Wrap k incase it moves during GetDirectInterface. 586 StackHandleScope<1> hs(self); 587 HandleWrapper<mirror::Class> h_k(hs.NewHandleWrapper(&k)); 588 // Is this field in any of this class' interfaces? 589 for (uint32_t i = 0; i < h_k->NumDirectInterfaces(); ++i) { 590 StackHandleScope<1> hs(self); 591 Handle<mirror::Class> interface(hs.NewHandle(GetDirectInterface(self, h_k, i))); 592 f = FindStaticField(self, interface, name, type); 593 if (f != nullptr) { 594 return f; 595 } 596 } 597 } 598 return nullptr; 599} 600 601ArtField* Class::FindStaticField(Thread* self, Handle<Class> klass, const DexCache* dex_cache, 602 uint32_t dex_field_idx) { 603 for (Class* k = klass.Get(); k != nullptr; k = k->GetSuperClass()) { 604 // Is the field in this class? 605 ArtField* f = k->FindDeclaredStaticField(dex_cache, dex_field_idx); 606 if (f != NULL) { 607 return f; 608 } 609 // Wrap k incase it moves during GetDirectInterface. 610 StackHandleScope<1> hs(self); 611 HandleWrapper<mirror::Class> h_k(hs.NewHandleWrapper(&k)); 612 // Is this field in any of this class' interfaces? 613 for (uint32_t i = 0; i < h_k->NumDirectInterfaces(); ++i) { 614 StackHandleScope<1> hs(self); 615 Handle<mirror::Class> interface(hs.NewHandle(GetDirectInterface(self, h_k, i))); 616 f = FindStaticField(self, interface, dex_cache, dex_field_idx); 617 if (f != nullptr) { 618 return f; 619 } 620 } 621 } 622 return nullptr; 623} 624 625ArtField* Class::FindField(Thread* self, Handle<Class> klass, const StringPiece& name, 626 const StringPiece& type) { 627 // Find a field using the JLS field resolution order 628 for (Class* k = klass.Get(); k != NULL; k = k->GetSuperClass()) { 629 // Is the field in this class? 630 ArtField* f = k->FindDeclaredInstanceField(name, type); 631 if (f != nullptr) { 632 return f; 633 } 634 f = k->FindDeclaredStaticField(name, type); 635 if (f != nullptr) { 636 return f; 637 } 638 // Is this field in any of this class' interfaces? 639 StackHandleScope<1> hs(self); 640 HandleWrapper<mirror::Class> h_k(hs.NewHandleWrapper(&k)); 641 for (uint32_t i = 0; i < h_k->NumDirectInterfaces(); ++i) { 642 StackHandleScope<1> hs(self); 643 Handle<mirror::Class> interface(hs.NewHandle(GetDirectInterface(self, h_k, i))); 644 f = interface->FindStaticField(self, interface, name, type); 645 if (f != nullptr) { 646 return f; 647 } 648 } 649 } 650 return nullptr; 651} 652 653static void SetPreverifiedFlagOnMethods(mirror::ObjectArray<mirror::ArtMethod>* methods) 654 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 655 if (methods != NULL) { 656 for (int32_t index = 0, end = methods->GetLength(); index < end; ++index) { 657 mirror::ArtMethod* method = methods->GetWithoutChecks(index); 658 DCHECK(method != NULL); 659 if (!method->IsNative() && !method->IsAbstract()) { 660 method->SetPreverified(); 661 } 662 } 663 } 664} 665 666void Class::SetPreverifiedFlagOnAllMethods() { 667 DCHECK(IsVerified()); 668 SetPreverifiedFlagOnMethods(GetDirectMethods()); 669 SetPreverifiedFlagOnMethods(GetVirtualMethods()); 670} 671 672std::string Class::GetDescriptor() { 673 if (UNLIKELY(IsArrayClass())) { 674 return GetArrayDescriptor(); 675 } else if (UNLIKELY(IsPrimitive())) { 676 return Primitive::Descriptor(GetPrimitiveType()); 677 } else if (UNLIKELY(IsProxyClass())) { 678 return Runtime::Current()->GetClassLinker()->GetDescriptorForProxy(this); 679 } else { 680 const DexFile& dex_file = GetDexFile(); 681 const DexFile::TypeId& type_id = dex_file.GetTypeId(GetClassDef()->class_idx_); 682 return dex_file.GetTypeDescriptor(type_id); 683 } 684} 685 686std::string Class::GetArrayDescriptor() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 687 return "[" + GetComponentType()->GetDescriptor(); 688} 689 690const DexFile::ClassDef* Class::GetClassDef() { 691 uint16_t class_def_idx = GetDexClassDefIndex(); 692 if (class_def_idx == DexFile::kDexNoIndex16) { 693 return nullptr; 694 } 695 return &GetDexFile().GetClassDef(class_def_idx); 696} 697 698uint32_t Class::NumDirectInterfaces() { 699 if (IsPrimitive()) { 700 return 0; 701 } else if (IsArrayClass()) { 702 return 2; 703 } else if (IsProxyClass()) { 704 mirror::SynthesizedProxyClass* proxy_class= 705 reinterpret_cast<mirror::SynthesizedProxyClass*>(this); 706 mirror::ObjectArray<mirror::Class>* interfaces = proxy_class->GetInterfaces(); 707 return interfaces != nullptr ? interfaces->GetLength() : 0; 708 } else { 709 const DexFile::TypeList* interfaces = GetInterfaceTypeList(); 710 if (interfaces == nullptr) { 711 return 0; 712 } else { 713 return interfaces->Size(); 714 } 715 } 716} 717 718uint16_t Class::GetDirectInterfaceTypeIdx(uint32_t idx) { 719 DCHECK(!IsPrimitive()); 720 DCHECK(!IsArrayClass()); 721 return GetInterfaceTypeList()->GetTypeItem(idx).type_idx_; 722} 723 724mirror::Class* Class::GetDirectInterface(Thread* self, Handle<mirror::Class> klass, uint32_t idx) { 725 DCHECK(klass.Get() != nullptr); 726 DCHECK(!klass->IsPrimitive()); 727 if (klass->IsArrayClass()) { 728 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 729 if (idx == 0) { 730 return class_linker->FindSystemClass(self, "Ljava/lang/Cloneable;"); 731 } else { 732 DCHECK_EQ(1U, idx); 733 return class_linker->FindSystemClass(self, "Ljava/io/Serializable;"); 734 } 735 } else if (klass->IsProxyClass()) { 736 mirror::SynthesizedProxyClass* proxy_class = 737 reinterpret_cast<mirror::SynthesizedProxyClass*>(klass.Get()); 738 mirror::ObjectArray<mirror::Class>* interfaces = proxy_class->GetInterfaces(); 739 DCHECK(interfaces != nullptr); 740 return interfaces->Get(idx); 741 } else { 742 uint16_t type_idx = klass->GetDirectInterfaceTypeIdx(idx); 743 mirror::Class* interface = klass->GetDexCache()->GetResolvedType(type_idx); 744 if (interface == nullptr) { 745 interface = Runtime::Current()->GetClassLinker()->ResolveType(klass->GetDexFile(), type_idx, 746 klass.Get()); 747 CHECK(interface != nullptr || self->IsExceptionPending()); 748 } 749 return interface; 750 } 751} 752 753const char* Class::GetSourceFile() { 754 std::string descriptor(GetDescriptor()); 755 const DexFile& dex_file = GetDexFile(); 756 const DexFile::ClassDef* dex_class_def = GetClassDef(); 757 if (dex_class_def == nullptr) { 758 // Generated classes have no class def. 759 return nullptr; 760 } 761 return dex_file.GetSourceFile(*dex_class_def); 762} 763 764std::string Class::GetLocation() { 765 mirror::DexCache* dex_cache = GetDexCache(); 766 if (dex_cache != nullptr && !IsProxyClass()) { 767 return dex_cache->GetLocation()->ToModifiedUtf8(); 768 } 769 // Arrays and proxies are generated and have no corresponding dex file location. 770 return "generated class"; 771} 772 773const DexFile::TypeList* Class::GetInterfaceTypeList() { 774 const DexFile::ClassDef* class_def = GetClassDef(); 775 if (class_def == nullptr) { 776 return nullptr; 777 } 778 return GetDexFile().GetInterfacesList(*class_def); 779} 780 781} // namespace mirror 782} // namespace art 783