runtime/class_linker_test.cc

   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_linker.h"
  18
  19 #include <memory>
  20 #include <string>
  21
  22 #include "art_field-inl.h"
  23 #include "art_method-inl.h"
  24 #include "class_linker-inl.h"
  25 #include "common_runtime_test.h"
  26 #include "dex_file.h"
  27 #include "experimental_flags.h"
  28 #include "entrypoints/entrypoint_utils-inl.h"
  29 #include "gc/heap.h"
  30 #include "mirror/abstract_method.h"
  31 #include "mirror/accessible_object.h"
  32 #include "mirror/class-inl.h"
  33 #include "mirror/dex_cache.h"
  34 #include "mirror/field.h"
  35 #include "mirror/object-inl.h"
  36 #include "mirror/object_array-inl.h"
  37 #include "mirror/proxy.h"
  38 #include "mirror/reference.h"
  39 #include "mirror/stack_trace_element.h"
  40 #include "mirror/string-inl.h"
  41 #include "handle_scope-inl.h"
  42 #include "scoped_thread_state_change.h"
  43 #include "thread-inl.h"
  44
  45 namespace art {
  46
  47 class ClassLinkerTest : public CommonRuntimeTest {
  48  protected:
  49   void AssertNonExistentClass(const std::string& descriptor)
  50       SHARED_REQUIRES(Locks::mutator_lock_) {
  51     Thread* self = Thread::Current();
  52     EXPECT_TRUE(class_linker_->FindSystemClass(self, descriptor.c_str()) == nullptr);
  53     EXPECT_TRUE(self->IsExceptionPending());
  54     mirror::Object* exception = self->GetException();
  55     self->ClearException();
  56     mirror::Class* exception_class =
  57         class_linker_->FindSystemClass(self, "Ljava/lang/NoClassDefFoundError;");
  58     EXPECT_TRUE(exception->InstanceOf(exception_class));
  59   }
  60
  61   void AssertPrimitiveClass(const std::string& descriptor)
  62       SHARED_REQUIRES(Locks::mutator_lock_) {
  63     Thread* self = Thread::Current();
  64     AssertPrimitiveClass(descriptor, class_linker_->FindSystemClass(self, descriptor.c_str()));
  65   }
  66
  67   void AssertPrimitiveClass(const std::string& descriptor, mirror::Class* primitive)
  68       SHARED_REQUIRES(Locks::mutator_lock_) {
  69     ASSERT_TRUE(primitive != nullptr);
  70     ASSERT_TRUE(primitive->GetClass() != nullptr);
  71     ASSERT_EQ(primitive->GetClass(), primitive->GetClass()->GetClass());
  72     EXPECT_TRUE(primitive->GetClass()->GetSuperClass() != nullptr);
  73     std::string temp;
  74     ASSERT_STREQ(descriptor.c_str(), primitive->GetDescriptor(&temp));
  75     EXPECT_TRUE(primitive->GetSuperClass() == nullptr);
  76     EXPECT_FALSE(primitive->HasSuperClass());
  77     EXPECT_TRUE(primitive->GetClassLoader() == nullptr);
  78     EXPECT_EQ(mirror::Class::kStatusInitialized, primitive->GetStatus());
  79     EXPECT_FALSE(primitive->IsErroneous());
  80     EXPECT_TRUE(primitive->IsLoaded());
  81     EXPECT_TRUE(primitive->IsResolved());
  82     EXPECT_TRUE(primitive->IsVerified());
  83     EXPECT_TRUE(primitive->IsInitialized());
  84     EXPECT_FALSE(primitive->IsArrayInstance());
  85     EXPECT_FALSE(primitive->IsArrayClass());
  86     EXPECT_TRUE(primitive->GetComponentType() == nullptr);
  87     EXPECT_FALSE(primitive->IsInterface());
  88     EXPECT_TRUE(primitive->IsPublic());
  89     EXPECT_TRUE(primitive->IsFinal());
  90     EXPECT_TRUE(primitive->IsPrimitive());
  91     EXPECT_FALSE(primitive->IsSynthetic());
  92     EXPECT_EQ(0U, primitive->NumDirectMethods());
  93     EXPECT_EQ(0U, primitive->NumVirtualMethods());
  94     EXPECT_EQ(0U, primitive->NumInstanceFields());
  95     EXPECT_EQ(0U, primitive->NumStaticFields());
  96     EXPECT_EQ(0U, primitive->NumDirectInterfaces());
  97     EXPECT_FALSE(primitive->HasVTable());
  98     EXPECT_EQ(0, primitive->GetIfTableCount());
  99     EXPECT_TRUE(primitive->GetIfTable() == nullptr);
 100     EXPECT_EQ(kAccPublic | kAccFinal | kAccAbstract, primitive->GetAccessFlags());
 101   }
 102
 103   void AssertObjectClass(mirror::Class* JavaLangObject)
 104       SHARED_REQUIRES(Locks::mutator_lock_) {
 105     ASSERT_TRUE(JavaLangObject != nullptr);
 106     ASSERT_TRUE(JavaLangObject->GetClass() != nullptr);
 107     ASSERT_EQ(JavaLangObject->GetClass(),
 108               JavaLangObject->GetClass()->GetClass());
 109     EXPECT_EQ(JavaLangObject, JavaLangObject->GetClass()->GetSuperClass());
 110     std::string temp;
 111     ASSERT_STREQ(JavaLangObject->GetDescriptor(&temp), "Ljava/lang/Object;");
 112     EXPECT_TRUE(JavaLangObject->GetSuperClass() == nullptr);
 113     EXPECT_FALSE(JavaLangObject->HasSuperClass());
 114     EXPECT_TRUE(JavaLangObject->GetClassLoader() == nullptr);
 115     EXPECT_EQ(mirror::Class::kStatusInitialized, JavaLangObject->GetStatus());
 116     EXPECT_FALSE(JavaLangObject->IsErroneous());
 117     EXPECT_TRUE(JavaLangObject->IsLoaded());
 118     EXPECT_TRUE(JavaLangObject->IsResolved());
 119     EXPECT_TRUE(JavaLangObject->IsVerified());
 120     EXPECT_TRUE(JavaLangObject->IsInitialized());
 121     EXPECT_FALSE(JavaLangObject->IsArrayInstance());
 122     EXPECT_FALSE(JavaLangObject->IsArrayClass());
 123     EXPECT_TRUE(JavaLangObject->GetComponentType() == nullptr);
 124     EXPECT_FALSE(JavaLangObject->IsInterface());
 125     EXPECT_TRUE(JavaLangObject->IsPublic());
 126     EXPECT_FALSE(JavaLangObject->IsFinal());
 127     EXPECT_FALSE(JavaLangObject->IsPrimitive());
 128     EXPECT_FALSE(JavaLangObject->IsSynthetic());
 129     EXPECT_EQ(2U, JavaLangObject->NumDirectMethods());
 130     EXPECT_EQ(11U, JavaLangObject->NumVirtualMethods());
 131     if (!kUseBrooksReadBarrier) {
 132       EXPECT_EQ(2U, JavaLangObject->NumInstanceFields());
 133     } else {
 134       EXPECT_EQ(4U, JavaLangObject->NumInstanceFields());
 135     }
 136     EXPECT_STREQ(JavaLangObject->GetInstanceField(0)->GetName(),
 137                  "shadow$_klass_");
 138     EXPECT_STREQ(JavaLangObject->GetInstanceField(1)->GetName(),
 139                  "shadow$_monitor_");
 140     if (kUseBrooksReadBarrier) {
 141       EXPECT_STREQ(JavaLangObject->GetInstanceField(2)->GetName(),
 142                    "shadow$_x_rb_ptr_");
 143       EXPECT_STREQ(JavaLangObject->GetInstanceField(3)->GetName(),
 144                    "shadow$_x_xpadding_");
 145     }
 146
 147     EXPECT_EQ(0U, JavaLangObject->NumStaticFields());
 148     EXPECT_EQ(0U, JavaLangObject->NumDirectInterfaces());
 149
 150     size_t pointer_size = class_linker_->GetImagePointerSize();
 151     ArtMethod* unimplemented = runtime_->GetImtUnimplementedMethod();
 152     ImTable* imt = JavaLangObject->GetImt(pointer_size);
 153     ASSERT_NE(nullptr, imt);
 154     for (size_t i = 0; i < ImTable::kSize; ++i) {
 155       ASSERT_EQ(unimplemented, imt->Get(i, pointer_size));
 156     }
 157   }
 158
 159   void AssertArrayClass(const std::string& array_descriptor,
 160                         const std::string& component_type,
 161                         mirror::ClassLoader* class_loader)
 162       SHARED_REQUIRES(Locks::mutator_lock_) {
 163     Thread* self = Thread::Current();
 164     StackHandleScope<2> hs(self);
 165     Handle<mirror::ClassLoader> loader(hs.NewHandle(class_loader));
 166     Handle<mirror::Class> array(
 167         hs.NewHandle(class_linker_->FindClass(self, array_descriptor.c_str(), loader)));
 168     std::string temp;
 169     EXPECT_STREQ(component_type.c_str(), array->GetComponentType()->GetDescriptor(&temp));
 170     EXPECT_EQ(class_loader, array->GetClassLoader());
 171     EXPECT_EQ(kAccFinal | kAccAbstract, (array->GetAccessFlags() & (kAccFinal | kAccAbstract)));
 172     AssertArrayClass(array_descriptor, array);
 173   }
 174
 175   void AssertArrayClass(const std::string& array_descriptor, Handle<mirror::Class> array)
 176       SHARED_REQUIRES(Locks::mutator_lock_) {
 177     ASSERT_TRUE(array.Get() != nullptr);
 178     ASSERT_TRUE(array->GetClass() != nullptr);
 179     ASSERT_EQ(array->GetClass(), array->GetClass()->GetClass());
 180     EXPECT_TRUE(array->GetClass()->GetSuperClass() != nullptr);
 181     std::string temp;
 182     ASSERT_STREQ(array_descriptor.c_str(), array->GetDescriptor(&temp));
 183     EXPECT_TRUE(array->GetSuperClass() != nullptr);
 184     Thread* self = Thread::Current();
 185     EXPECT_EQ(class_linker_->FindSystemClass(self, "Ljava/lang/Object;"), array->GetSuperClass());
 186     EXPECT_TRUE(array->HasSuperClass());
 187     ASSERT_TRUE(array->GetComponentType() != nullptr);
 188     ASSERT_GT(strlen(array->GetComponentType()->GetDescriptor(&temp)), 0U);
 189     EXPECT_EQ(mirror::Class::kStatusInitialized, array->GetStatus());
 190     EXPECT_FALSE(array->IsErroneous());
 191     EXPECT_TRUE(array->IsLoaded());
 192     EXPECT_TRUE(array->IsResolved());
 193     EXPECT_TRUE(array->IsVerified());
 194     EXPECT_TRUE(array->IsInitialized());
 195     EXPECT_FALSE(array->IsArrayInstance());
 196     EXPECT_TRUE(array->IsArrayClass());
 197     EXPECT_FALSE(array->IsInterface());
 198     EXPECT_EQ(array->GetComponentType()->IsPublic(), array->IsPublic());
 199     EXPECT_TRUE(array->IsFinal());
 200     EXPECT_FALSE(array->IsPrimitive());
 201     EXPECT_FALSE(array->IsSynthetic());
 202     EXPECT_EQ(0U, array->NumDirectMethods());
 203     EXPECT_EQ(0U, array->NumVirtualMethods());
 204     EXPECT_EQ(0U, array->NumInstanceFields());
 205     EXPECT_EQ(0U, array->NumStaticFields());
 206     EXPECT_EQ(2U, array->NumDirectInterfaces());
 207     EXPECT_TRUE(array->ShouldHaveImt());
 208     EXPECT_TRUE(array->ShouldHaveEmbeddedVTable());
 209     EXPECT_EQ(2, array->GetIfTableCount());
 210     ASSERT_TRUE(array->GetIfTable() != nullptr);
 211     mirror::Class* direct_interface0 = mirror::Class::GetDirectInterface(self, array, 0);
 212     EXPECT_TRUE(direct_interface0 != nullptr);
 213     EXPECT_STREQ(direct_interface0->GetDescriptor(&temp), "Ljava/lang/Cloneable;");
 214     mirror::Class* direct_interface1 = mirror::Class::GetDirectInterface(self, array, 1);
 215     EXPECT_STREQ(direct_interface1->GetDescriptor(&temp), "Ljava/io/Serializable;");
 216     mirror::Class* array_ptr = array->GetComponentType();
 217     EXPECT_EQ(class_linker_->FindArrayClass(self, &array_ptr), array.Get());
 218
 219     size_t pointer_size = class_linker_->GetImagePointerSize();
 220     mirror::Class* JavaLangObject =
 221         class_linker_->FindSystemClass(self, "Ljava/lang/Object;");
 222     ImTable* JavaLangObject_imt = JavaLangObject->GetImt(pointer_size);
 223     // IMT of a array class should be shared with the IMT of the java.lag.Object
 224     ASSERT_EQ(JavaLangObject_imt, array->GetImt(pointer_size));
 225   }
 226
 227   void AssertMethod(ArtMethod* method) SHARED_REQUIRES(Locks::mutator_lock_) {
 228     EXPECT_TRUE(method != nullptr);
 229     EXPECT_TRUE(method->GetDeclaringClass() != nullptr);
 230     EXPECT_TRUE(method->GetName() != nullptr);
 231     EXPECT_TRUE(method->GetSignature() != Signature::NoSignature());
 232
 233     EXPECT_TRUE(method->HasDexCacheResolvedMethods(sizeof(void*)));
 234     EXPECT_TRUE(method->HasDexCacheResolvedTypes(sizeof(void*)));
 235     EXPECT_TRUE(method->HasSameDexCacheResolvedMethods(
 236         method->GetDeclaringClass()->GetDexCache()->GetResolvedMethods(),
 237         sizeof(void*)));
 238     EXPECT_TRUE(method->HasSameDexCacheResolvedTypes(
 239         method->GetDeclaringClass()->GetDexCache()->GetResolvedTypes(),
 240         sizeof(void*)));
 241   }
 242
 243   void AssertField(mirror::Class* klass, ArtField* field)
 244       SHARED_REQUIRES(Locks::mutator_lock_) {
 245     EXPECT_TRUE(field != nullptr);
 246     EXPECT_EQ(klass, field->GetDeclaringClass());
 247     EXPECT_TRUE(field->GetName() != nullptr);
 248     EXPECT_TRUE(field->GetType<true>() != nullptr);
 249   }
 250
 251   void AssertClass(const std::string& descriptor, Handle<mirror::Class> klass)
 252       SHARED_REQUIRES(Locks::mutator_lock_) {
 253     std::string temp;
 254     EXPECT_STREQ(descriptor.c_str(), klass->GetDescriptor(&temp));
 255     if (descriptor == "Ljava/lang/Object;") {
 256       EXPECT_FALSE(klass->HasSuperClass());
 257     } else {
 258       EXPECT_TRUE(klass->HasSuperClass());
 259       EXPECT_TRUE(klass->GetSuperClass() != nullptr);
 260     }
 261     EXPECT_TRUE(klass->GetClass() != nullptr);
 262     EXPECT_EQ(klass->GetClass(), klass->GetClass()->GetClass());
 263     EXPECT_TRUE(klass->GetDexCache() != nullptr);
 264     EXPECT_TRUE(klass->IsLoaded());
 265     EXPECT_TRUE(klass->IsResolved());
 266     EXPECT_FALSE(klass->IsErroneous());
 267     EXPECT_FALSE(klass->IsArrayClass());
 268     EXPECT_TRUE(klass->GetComponentType() == nullptr);
 269     EXPECT_TRUE(klass->IsInSamePackage(klass.Get()));
 270     EXPECT_TRUE(klass->GetDexCacheStrings() != nullptr);
 271     EXPECT_EQ(klass->GetDexCacheStrings(), klass->GetDexCache()->GetStrings());
 272     std::string temp2;
 273     EXPECT_TRUE(mirror::Class::IsInSamePackage(klass->GetDescriptor(&temp),
 274                                                klass->GetDescriptor(&temp2)));
 275     if (klass->IsInterface()) {
 276       EXPECT_TRUE(klass->IsAbstract());
 277       // Check that all direct methods are static (either <clinit> or a regular static method).
 278       for (ArtMethod& m : klass->GetDirectMethods(sizeof(void*))) {
 279         EXPECT_TRUE(m.IsStatic());
 280         EXPECT_TRUE(m.IsDirect());
 281       }
 282     } else {
 283       if (!klass->IsSynthetic()) {
 284         EXPECT_NE(0U, klass->NumDirectMethods());
 285       }
 286     }
 287     EXPECT_EQ(klass->IsInterface(), !klass->HasVTable());
 288     mirror::IfTable* iftable = klass->GetIfTable();
 289     for (int i = 0; i < klass->GetIfTableCount(); i++) {
 290       mirror::Class* interface = iftable->GetInterface(i);
 291       ASSERT_TRUE(interface != nullptr);
 292       if (klass->IsInterface()) {
 293         EXPECT_EQ(0U, iftable->GetMethodArrayCount(i));
 294       } else {
 295         EXPECT_EQ(interface->NumDeclaredVirtualMethods(), iftable->GetMethodArrayCount(i));
 296       }
 297     }
 298     if (klass->IsAbstract()) {
 299       EXPECT_FALSE(klass->IsFinal());
 300     } else {
 301       EXPECT_FALSE(klass->IsAnnotation());
 302     }
 303     if (klass->IsFinal()) {
 304       EXPECT_FALSE(klass->IsAbstract());
 305       EXPECT_FALSE(klass->IsAnnotation());
 306     }
 307     if (klass->IsAnnotation()) {
 308       EXPECT_FALSE(klass->IsFinal());
 309       EXPECT_TRUE(klass->IsAbstract());
 310     }
 311
 312     EXPECT_FALSE(klass->IsPrimitive());
 313     EXPECT_TRUE(klass->CanAccess(klass.Get()));
 314
 315     for (ArtMethod& method : klass->GetDirectMethods(sizeof(void*))) {
 316       AssertMethod(&method);
 317       EXPECT_TRUE(method.IsDirect());
 318       EXPECT_EQ(klass.Get(), method.GetDeclaringClass());
 319     }
 320
 321     for (ArtMethod& method : klass->GetDeclaredVirtualMethods(sizeof(void*))) {
 322       AssertMethod(&method);
 323       EXPECT_FALSE(method.IsDirect());
 324       EXPECT_EQ(klass.Get(), method.GetDeclaringClass());
 325     }
 326
 327     for (ArtMethod& method : klass->GetCopiedMethods(sizeof(void*))) {
 328       AssertMethod(&method);
 329       EXPECT_FALSE(method.IsDirect());
 330       EXPECT_TRUE(method.IsCopied());
 331       EXPECT_TRUE(method.GetDeclaringClass()->IsInterface())
 332           << "declaring class: " << PrettyClass(method.GetDeclaringClass());
 333       EXPECT_TRUE(method.GetDeclaringClass()->IsAssignableFrom(klass.Get()))
 334           << "declaring class: " << PrettyClass(method.GetDeclaringClass());
 335     }
 336
 337     for (size_t i = 0; i < klass->NumInstanceFields(); i++) {
 338       ArtField* field = klass->GetInstanceField(i);
 339       AssertField(klass.Get(), field);
 340       EXPECT_FALSE(field->IsStatic());
 341     }
 342
 343     for (size_t i = 0; i < klass->NumStaticFields(); i++) {
 344       ArtField* field = klass->GetStaticField(i);
 345       AssertField(klass.Get(), field);
 346       EXPECT_TRUE(field->IsStatic());
 347     }
 348
 349     // Confirm that all instances field offsets are packed together at the start.
 350     EXPECT_GE(klass->NumInstanceFields(), klass->NumReferenceInstanceFields());
 351     MemberOffset start_ref_offset = klass->GetFirstReferenceInstanceFieldOffset();
 352     MemberOffset end_ref_offset(start_ref_offset.Uint32Value() +
 353                                 klass->NumReferenceInstanceFields() *
 354                                     sizeof(mirror::HeapReference<mirror::Object>));
 355     MemberOffset current_ref_offset = start_ref_offset;
 356     for (size_t i = 0; i < klass->NumInstanceFields(); i++) {
 357       ArtField* field = klass->GetInstanceField(i);
 358       mirror::Class* field_type = field->GetType<true>();
 359       ASSERT_TRUE(field_type != nullptr);
 360       if (!field->IsPrimitiveType()) {
 361         ASSERT_TRUE(!field_type->IsPrimitive());
 362         ASSERT_EQ(current_ref_offset.Uint32Value(), field->GetOffset().Uint32Value());
 363         if (current_ref_offset.Uint32Value() == end_ref_offset.Uint32Value()) {
 364           // While Reference.referent is not primitive, the ClassLinker
 365           // treats it as such so that the garbage collector won't scan it.
 366           EXPECT_EQ(PrettyField(field),
 367                     "java.lang.Object java.lang.ref.Reference.referent");
 368         } else {
 369           current_ref_offset = MemberOffset(current_ref_offset.Uint32Value() +
 370                                             sizeof(mirror::HeapReference<mirror::Object>));
 371         }
 372       } else {
 373         if (field->GetOffset().Uint32Value() < end_ref_offset.Uint32Value()) {
 374           // Shuffled before references.
 375           ASSERT_LT(field->GetOffset().Uint32Value(), start_ref_offset.Uint32Value());
 376           CHECK(!IsAligned<4>(field->GetOffset().Uint32Value()));
 377         }
 378       }
 379     }
 380     ASSERT_EQ(end_ref_offset.Uint32Value(), current_ref_offset.Uint32Value());
 381
 382     uint32_t total_num_reference_instance_fields = 0;
 383     mirror::Class* k = klass.Get();
 384     while (k != nullptr) {
 385       total_num_reference_instance_fields += k->NumReferenceInstanceFields();
 386       k = k->GetSuperClass();
 387     }
 388     EXPECT_GE(total_num_reference_instance_fields, 1U);  // Should always have Object's class.
 389     if (klass->GetReferenceInstanceOffsets() != mirror::Class::kClassWalkSuper) {
 390       // The reference instance offsets have a bit set for each reference offset.
 391       // +1 for Object's class.
 392       EXPECT_EQ(static_cast<uint32_t>(POPCOUNT(klass->GetReferenceInstanceOffsets())) + 1,
 393                 total_num_reference_instance_fields);
 394     }
 395   }
 396
 397   void AssertDexFileClass(mirror::ClassLoader* class_loader, const std::string& descriptor)
 398       SHARED_REQUIRES(Locks::mutator_lock_) {
 399     ASSERT_TRUE(descriptor != nullptr);
 400     Thread* self = Thread::Current();
 401     StackHandleScope<1> hs(self);
 402     Handle<mirror::Class> klass(
 403         hs.NewHandle(class_linker_->FindSystemClass(self, descriptor.c_str())));
 404     ASSERT_TRUE(klass.Get() != nullptr);
 405     std::string temp;
 406     EXPECT_STREQ(descriptor.c_str(), klass.Get()->GetDescriptor(&temp));
 407     EXPECT_EQ(class_loader, klass->GetClassLoader());
 408     if (klass->IsPrimitive()) {
 409       AssertPrimitiveClass(descriptor, klass.Get());
 410     } else if (klass->IsArrayClass()) {
 411       AssertArrayClass(descriptor, klass);
 412     } else {
 413       AssertClass(descriptor, klass);
 414     }
 415   }
 416
 417   void AssertDexFile(const DexFile& dex, mirror::ClassLoader* class_loader)
 418       SHARED_REQUIRES(Locks::mutator_lock_) {
 419     // Verify all the classes defined in this file
 420     for (size_t i = 0; i < dex.NumClassDefs(); i++) {
 421       const DexFile::ClassDef& class_def = dex.GetClassDef(i);
 422       const char* descriptor = dex.GetClassDescriptor(class_def);
 423       AssertDexFileClass(class_loader, descriptor);
 424     }
 425     // Verify all the types referenced by this file
 426     for (size_t i = 0; i < dex.NumTypeIds(); i++) {
 427       const DexFile::TypeId& type_id = dex.GetTypeId(i);
 428       const char* descriptor = dex.GetTypeDescriptor(type_id);
 429       AssertDexFileClass(class_loader, descriptor);
 430     }
 431     TestRootVisitor visitor;
 432     class_linker_->VisitRoots(&visitor, kVisitRootFlagAllRoots);
 433     // Verify the dex cache has resolution methods in all resolved method slots
 434     mirror::DexCache* dex_cache = class_linker_->FindDexCache(Thread::Current(), dex);
 435     auto* resolved_methods = dex_cache->GetResolvedMethods();
 436     for (size_t i = 0, num_methods = dex_cache->NumResolvedMethods(); i != num_methods; ++i) {
 437       EXPECT_TRUE(
 438           mirror::DexCache::GetElementPtrSize(resolved_methods, i, sizeof(void*)) != nullptr)
 439           << dex.GetLocation() << " i=" << i;
 440     }
 441   }
 442
 443   class TestRootVisitor : public SingleRootVisitor {
 444    public:
 445     void VisitRoot(mirror::Object* root, const RootInfo& info ATTRIBUTE_UNUSED) OVERRIDE {
 446       EXPECT_TRUE(root != nullptr);
 447     }
 448   };
 449 };
 450
 451 struct CheckOffset {
 452   size_t cpp_offset;
 453   const char* java_name;
 454   CheckOffset(size_t c, const char* j) : cpp_offset(c), java_name(j) {}
 455 };
 456
 457 template <typename T>
 458 struct CheckOffsets {
 459   CheckOffsets(bool is_static_in, const char* class_descriptor_in)
 460       : is_static(is_static_in), class_descriptor(class_descriptor_in) {}
 461   bool is_static;
 462   std::string class_descriptor;
 463   std::vector<CheckOffset> offsets;
 464
 465   bool Check() SHARED_REQUIRES(Locks::mutator_lock_) {
 466     Thread* self = Thread::Current();
 467     mirror::Class* klass =
 468         Runtime::Current()->GetClassLinker()->FindSystemClass(self, class_descriptor.c_str());
 469     CHECK(klass != nullptr) << class_descriptor;
 470
 471     bool error = false;
 472
 473     // Classes have a different size due to padding field. Strings are variable length.
 474     if (!klass->IsClassClass() && !klass->IsStringClass() && !is_static) {
 475       // Currently only required for AccessibleObject since of the padding fields. The class linker
 476       // says AccessibleObject is 9 bytes but sizeof(AccessibleObject) is 12 bytes due to padding.
 477       // The RoundUp is to get around this case.
 478       static constexpr size_t kPackAlignment = 4;
 479       size_t expected_size = RoundUp(is_static ? klass->GetClassSize(): klass->GetObjectSize(),
 480           kPackAlignment);
 481       if (sizeof(T) != expected_size) {
 482         LOG(ERROR) << "Class size mismatch:"
 483            << " class=" << class_descriptor
 484            << " Java=" << expected_size
 485            << " C++=" << sizeof(T);
 486         error = true;
 487       }
 488     }
 489
 490     size_t num_fields = is_static ? klass->NumStaticFields() : klass->NumInstanceFields();
 491     if (offsets.size() != num_fields) {
 492       LOG(ERROR) << "Field count mismatch:"
 493          << " class=" << class_descriptor
 494          << " Java=" << num_fields
 495          << " C++=" << offsets.size();
 496       error = true;
 497     }
 498
 499     for (size_t i = 0; i < offsets.size(); i++) {
 500       ArtField* field = is_static ? klass->GetStaticField(i) : klass->GetInstanceField(i);
 501       StringPiece field_name(field->GetName());
 502       if (field_name != offsets[i].java_name) {
 503         error = true;
 504       }
 505     }
 506     if (error) {
 507       for (size_t i = 0; i < offsets.size(); i++) {
 508         CheckOffset& offset = offsets[i];
 509         ArtField* field = is_static ? klass->GetStaticField(i) : klass->GetInstanceField(i);
 510         StringPiece field_name(field->GetName());
 511         if (field_name != offsets[i].java_name) {
 512           LOG(ERROR) << "JAVA FIELD ORDER MISMATCH NEXT LINE:";
 513         }
 514         LOG(ERROR) << "Java field order:"
 515            << " i=" << i << " class=" << class_descriptor
 516            << " Java=" << field_name
 517            << " CheckOffsets=" << offset.java_name;
 518       }
 519     }
 520
 521     for (size_t i = 0; i < offsets.size(); i++) {
 522       CheckOffset& offset = offsets[i];
 523       ArtField* field = is_static ? klass->GetStaticField(i) : klass->GetInstanceField(i);
 524       if (field->GetOffset().Uint32Value() != offset.cpp_offset) {
 525         error = true;
 526       }
 527     }
 528     if (error) {
 529       for (size_t i = 0; i < offsets.size(); i++) {
 530         CheckOffset& offset = offsets[i];
 531         ArtField* field = is_static ? klass->GetStaticField(i) : klass->GetInstanceField(i);
 532         if (field->GetOffset().Uint32Value() != offset.cpp_offset) {
 533           LOG(ERROR) << "OFFSET MISMATCH NEXT LINE:";
 534         }
 535         LOG(ERROR) << "Offset: class=" << class_descriptor << " field=" << offset.java_name
 536            << " Java=" << field->GetOffset().Uint32Value() << " C++=" << offset.cpp_offset;
 537       }
 538     }
 539
 540     return !error;
 541   };
 542
 543   void addOffset(size_t offset, const char* name) {
 544     offsets.push_back(CheckOffset(offset, name));
 545   }
 546
 547  private:
 548   DISALLOW_IMPLICIT_CONSTRUCTORS(CheckOffsets);
 549 };
 550
 551 // Note that ClassLinkerTest.ValidateFieldOrderOfJavaCppUnionClasses
 552 // is first since if it is failing, others are unlikely to succeed.
 553
 554 struct ObjectOffsets : public CheckOffsets<mirror::Object> {
 555   ObjectOffsets() : CheckOffsets<mirror::Object>(false, "Ljava/lang/Object;") {
 556     addOffset(OFFSETOF_MEMBER(mirror::Object, klass_), "shadow$_klass_");
 557     addOffset(OFFSETOF_MEMBER(mirror::Object, monitor_), "shadow$_monitor_");
 558 #ifdef USE_BROOKS_READ_BARRIER
 559     addOffset(OFFSETOF_MEMBER(mirror::Object, x_rb_ptr_), "shadow$_x_rb_ptr_");
 560     addOffset(OFFSETOF_MEMBER(mirror::Object, x_xpadding_), "shadow$_x_xpadding_");
 561 #endif
 562   };
 563 };
 564
 565 struct ClassOffsets : public CheckOffsets<mirror::Class> {
 566   ClassOffsets() : CheckOffsets<mirror::Class>(false, "Ljava/lang/Class;") {
 567     addOffset(OFFSETOF_MEMBER(mirror::Class, access_flags_), "accessFlags");
 568     addOffset(OFFSETOF_MEMBER(mirror::Class, annotation_type_), "annotationType");
 569     addOffset(OFFSETOF_MEMBER(mirror::Class, class_flags_), "classFlags");
 570     addOffset(OFFSETOF_MEMBER(mirror::Class, class_loader_), "classLoader");
 571     addOffset(OFFSETOF_MEMBER(mirror::Class, class_size_), "classSize");
 572     addOffset(OFFSETOF_MEMBER(mirror::Class, clinit_thread_id_), "clinitThreadId");
 573     addOffset(OFFSETOF_MEMBER(mirror::Class, component_type_), "componentType");
 574     addOffset(OFFSETOF_MEMBER(mirror::Class, copied_methods_offset_), "copiedMethodsOffset");
 575     addOffset(OFFSETOF_MEMBER(mirror::Class, dex_cache_), "dexCache");
 576     addOffset(OFFSETOF_MEMBER(mirror::Class, dex_cache_strings_), "dexCacheStrings");
 577     addOffset(OFFSETOF_MEMBER(mirror::Class, dex_class_def_idx_), "dexClassDefIndex");
 578     addOffset(OFFSETOF_MEMBER(mirror::Class, dex_type_idx_), "dexTypeIndex");
 579     addOffset(OFFSETOF_MEMBER(mirror::Class, ifields_), "iFields");
 580     addOffset(OFFSETOF_MEMBER(mirror::Class, iftable_), "ifTable");
 581     addOffset(OFFSETOF_MEMBER(mirror::Class, methods_), "methods");
 582     addOffset(OFFSETOF_MEMBER(mirror::Class, name_), "name");
 583     addOffset(OFFSETOF_MEMBER(mirror::Class, num_reference_instance_fields_),
 584               "numReferenceInstanceFields");
 585     addOffset(OFFSETOF_MEMBER(mirror::Class, num_reference_static_fields_),
 586               "numReferenceStaticFields");
 587     addOffset(OFFSETOF_MEMBER(mirror::Class, object_size_), "objectSize");
 588     addOffset(OFFSETOF_MEMBER(mirror::Class, primitive_type_), "primitiveType");
 589     addOffset(OFFSETOF_MEMBER(mirror::Class, reference_instance_offsets_),
 590               "referenceInstanceOffsets");
 591     addOffset(OFFSETOF_MEMBER(mirror::Class, sfields_), "sFields");
 592     addOffset(OFFSETOF_MEMBER(mirror::Class, status_), "status");
 593     addOffset(OFFSETOF_MEMBER(mirror::Class, super_class_), "superClass");
 594     addOffset(OFFSETOF_MEMBER(mirror::Class, verify_error_), "verifyError");
 595     addOffset(OFFSETOF_MEMBER(mirror::Class, virtual_methods_offset_), "virtualMethodsOffset");
 596     addOffset(OFFSETOF_MEMBER(mirror::Class, vtable_), "vtable");
 597   };
 598 };
 599
 600 struct StringOffsets : public CheckOffsets<mirror::String> {
 601   StringOffsets() : CheckOffsets<mirror::String>(false, "Ljava/lang/String;") {
 602     addOffset(OFFSETOF_MEMBER(mirror::String, count_), "count");
 603     addOffset(OFFSETOF_MEMBER(mirror::String, hash_code_), "hash");
 604   };
 605 };
 606
 607 struct ThrowableOffsets : public CheckOffsets<mirror::Throwable> {
 608   ThrowableOffsets() : CheckOffsets<mirror::Throwable>(false, "Ljava/lang/Throwable;") {
 609     addOffset(OFFSETOF_MEMBER(mirror::Throwable, backtrace_), "backtrace");
 610     addOffset(OFFSETOF_MEMBER(mirror::Throwable, cause_), "cause");
 611     addOffset(OFFSETOF_MEMBER(mirror::Throwable, detail_message_), "detailMessage");
 612     addOffset(OFFSETOF_MEMBER(mirror::Throwable, stack_trace_), "stackTrace");
 613     addOffset(OFFSETOF_MEMBER(mirror::Throwable, suppressed_exceptions_), "suppressedExceptions");
 614   };
 615 };
 616
 617 struct StackTraceElementOffsets : public CheckOffsets<mirror::StackTraceElement> {
 618   StackTraceElementOffsets() : CheckOffsets<mirror::StackTraceElement>(
 619       false, "Ljava/lang/StackTraceElement;") {
 620     addOffset(OFFSETOF_MEMBER(mirror::StackTraceElement, declaring_class_), "declaringClass");
 621     addOffset(OFFSETOF_MEMBER(mirror::StackTraceElement, file_name_), "fileName");
 622     addOffset(OFFSETOF_MEMBER(mirror::StackTraceElement, line_number_), "lineNumber");
 623     addOffset(OFFSETOF_MEMBER(mirror::StackTraceElement, method_name_), "methodName");
 624   };
 625 };
 626
 627 struct ClassLoaderOffsets : public CheckOffsets<mirror::ClassLoader> {
 628   ClassLoaderOffsets() : CheckOffsets<mirror::ClassLoader>(false, "Ljava/lang/ClassLoader;") {
 629     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, allocator_), "allocator");
 630     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, class_table_), "classTable");
 631     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, packages_), "packages");
 632     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, parent_), "parent");
 633     addOffset(OFFSETOF_MEMBER(mirror::ClassLoader, proxyCache_), "proxyCache");
 634   };
 635 };
 636
 637 struct ProxyOffsets : public CheckOffsets<mirror::Proxy> {
 638   ProxyOffsets() : CheckOffsets<mirror::Proxy>(false, "Ljava/lang/reflect/Proxy;") {
 639     addOffset(OFFSETOF_MEMBER(mirror::Proxy, h_), "h");
 640   };
 641 };
 642
 643 struct DexCacheOffsets : public CheckOffsets<mirror::DexCache> {
 644   DexCacheOffsets() : CheckOffsets<mirror::DexCache>(false, "Ljava/lang/DexCache;") {
 645     addOffset(OFFSETOF_MEMBER(mirror::DexCache, dex_), "dex");
 646     addOffset(OFFSETOF_MEMBER(mirror::DexCache, dex_file_), "dexFile");
 647     addOffset(OFFSETOF_MEMBER(mirror::DexCache, location_), "location");
 648     addOffset(OFFSETOF_MEMBER(mirror::DexCache, num_resolved_fields_), "numResolvedFields");
 649     addOffset(OFFSETOF_MEMBER(mirror::DexCache, num_resolved_methods_), "numResolvedMethods");
 650     addOffset(OFFSETOF_MEMBER(mirror::DexCache, num_resolved_types_), "numResolvedTypes");
 651     addOffset(OFFSETOF_MEMBER(mirror::DexCache, num_strings_), "numStrings");
 652     addOffset(OFFSETOF_MEMBER(mirror::DexCache, resolved_fields_), "resolvedFields");
 653     addOffset(OFFSETOF_MEMBER(mirror::DexCache, resolved_methods_), "resolvedMethods");
 654     addOffset(OFFSETOF_MEMBER(mirror::DexCache, resolved_types_), "resolvedTypes");
 655     addOffset(OFFSETOF_MEMBER(mirror::DexCache, strings_), "strings");
 656   };
 657 };
 658
 659 struct ReferenceOffsets : public CheckOffsets<mirror::Reference> {
 660   ReferenceOffsets() : CheckOffsets<mirror::Reference>(false, "Ljava/lang/ref/Reference;") {
 661     addOffset(OFFSETOF_MEMBER(mirror::Reference, pending_next_), "pendingNext");
 662     addOffset(OFFSETOF_MEMBER(mirror::Reference, queue_), "queue");
 663     addOffset(OFFSETOF_MEMBER(mirror::Reference, queue_next_), "queueNext");
 664     addOffset(OFFSETOF_MEMBER(mirror::Reference, referent_), "referent");
 665   };
 666 };
 667
 668 struct FinalizerReferenceOffsets : public CheckOffsets<mirror::FinalizerReference> {
 669   FinalizerReferenceOffsets() : CheckOffsets<mirror::FinalizerReference>(
 670       false, "Ljava/lang/ref/FinalizerReference;") {
 671     addOffset(OFFSETOF_MEMBER(mirror::FinalizerReference, next_), "next");
 672     addOffset(OFFSETOF_MEMBER(mirror::FinalizerReference, prev_), "prev");
 673     addOffset(OFFSETOF_MEMBER(mirror::FinalizerReference, zombie_), "zombie");
 674   };
 675 };
 676
 677 struct AccessibleObjectOffsets : public CheckOffsets<mirror::AccessibleObject> {
 678   AccessibleObjectOffsets() : CheckOffsets<mirror::AccessibleObject>(
 679       false, "Ljava/lang/reflect/AccessibleObject;") {
 680     addOffset(mirror::AccessibleObject::FlagOffset().Uint32Value(), "override");
 681   };
 682 };
 683
 684 struct FieldOffsets : public CheckOffsets<mirror::Field> {
 685   FieldOffsets() : CheckOffsets<mirror::Field>(false, "Ljava/lang/reflect/Field;") {
 686     addOffset(OFFSETOF_MEMBER(mirror::Field, access_flags_), "accessFlags");
 687     addOffset(OFFSETOF_MEMBER(mirror::Field, declaring_class_), "declaringClass");
 688     addOffset(OFFSETOF_MEMBER(mirror::Field, dex_field_index_), "dexFieldIndex");
 689     addOffset(OFFSETOF_MEMBER(mirror::Field, offset_), "offset");
 690     addOffset(OFFSETOF_MEMBER(mirror::Field, type_), "type");
 691   };
 692 };
 693
 694 struct AbstractMethodOffsets : public CheckOffsets<mirror::AbstractMethod> {
 695   AbstractMethodOffsets() : CheckOffsets<mirror::AbstractMethod>(
 696       false, "Ljava/lang/reflect/AbstractMethod;") {
 697     addOffset(OFFSETOF_MEMBER(mirror::AbstractMethod, access_flags_), "accessFlags");
 698     addOffset(OFFSETOF_MEMBER(mirror::AbstractMethod, art_method_), "artMethod");
 699     addOffset(OFFSETOF_MEMBER(mirror::AbstractMethod, declaring_class_), "declaringClass");
 700     addOffset(OFFSETOF_MEMBER(mirror::AbstractMethod, declaring_class_of_overridden_method_),
 701               "declaringClassOfOverriddenMethod");
 702     addOffset(OFFSETOF_MEMBER(mirror::AbstractMethod, dex_method_index_), "dexMethodIndex");
 703   };
 704 };
 705
 706 // C++ fields must exactly match the fields in the Java classes. If this fails,
 707 // reorder the fields in the C++ class. Managed class fields are ordered by
 708 // ClassLinker::LinkFields.
 709 TEST_F(ClassLinkerTest, ValidateFieldOrderOfJavaCppUnionClasses) {
 710   ScopedObjectAccess soa(Thread::Current());
 711   EXPECT_TRUE(ObjectOffsets().Check());
 712   EXPECT_TRUE(ClassOffsets().Check());
 713   EXPECT_TRUE(StringOffsets().Check());
 714   EXPECT_TRUE(ThrowableOffsets().Check());
 715   EXPECT_TRUE(StackTraceElementOffsets().Check());
 716   EXPECT_TRUE(ClassLoaderOffsets().Check());
 717   EXPECT_TRUE(ProxyOffsets().Check());
 718   EXPECT_TRUE(DexCacheOffsets().Check());
 719   EXPECT_TRUE(ReferenceOffsets().Check());
 720   EXPECT_TRUE(FinalizerReferenceOffsets().Check());
 721   EXPECT_TRUE(AccessibleObjectOffsets().Check());
 722   EXPECT_TRUE(FieldOffsets().Check());
 723   EXPECT_TRUE(AbstractMethodOffsets().Check());
 724 }
 725
 726 TEST_F(ClassLinkerTest, FindClassNonexistent) {
 727   ScopedObjectAccess soa(Thread::Current());
 728   AssertNonExistentClass("NoSuchClass;");
 729   AssertNonExistentClass("LNoSuchClass;");
 730 }
 731
 732 TEST_F(ClassLinkerTest, GetDexFiles) {
 733   ScopedObjectAccess soa(Thread::Current());
 734
 735   jobject jclass_loader = LoadDex("Nested");
 736   std::vector<const DexFile*> dex_files(GetDexFiles(jclass_loader));
 737   ASSERT_EQ(dex_files.size(), 1U);
 738   EXPECT_TRUE(EndsWith(dex_files[0]->GetLocation(), "Nested.jar"));
 739
 740   jobject jclass_loader2 = LoadDex("MultiDex");
 741   std::vector<const DexFile*> dex_files2(GetDexFiles(jclass_loader2));
 742   ASSERT_EQ(dex_files2.size(), 2U);
 743   EXPECT_TRUE(EndsWith(dex_files2[0]->GetLocation(), "MultiDex.jar"));
 744 }
 745
 746 TEST_F(ClassLinkerTest, FindClassNested) {
 747   ScopedObjectAccess soa(Thread::Current());
 748   StackHandleScope<1> hs(soa.Self());
 749   Handle<mirror::ClassLoader> class_loader(
 750       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("Nested"))));
 751
 752   mirror::Class* outer = class_linker_->FindClass(soa.Self(), "LNested;", class_loader);
 753   ASSERT_TRUE(outer != nullptr);
 754   EXPECT_EQ(0U, outer->NumVirtualMethods());
 755   EXPECT_EQ(1U, outer->NumDirectMethods());
 756
 757   mirror::Class* inner = class_linker_->FindClass(soa.Self(), "LNested$Inner;", class_loader);
 758   ASSERT_TRUE(inner != nullptr);
 759   EXPECT_EQ(0U, inner->NumVirtualMethods());
 760   EXPECT_EQ(1U, inner->NumDirectMethods());
 761 }
 762
 763 TEST_F(ClassLinkerTest, FindClass_Primitives) {
 764   ScopedObjectAccess soa(Thread::Current());
 765   const std::string expected("BCDFIJSZV");
 766   for (int ch = 1; ch < 256; ++ch) {
 767     std::string descriptor;
 768     descriptor.push_back(ch);
 769     if (expected.find(ch) == std::string::npos) {
 770       AssertNonExistentClass(descriptor);
 771     } else {
 772       AssertPrimitiveClass(descriptor);
 773     }
 774   }
 775 }
 776
 777 TEST_F(ClassLinkerTest, FindClass) {
 778   ScopedObjectAccess soa(Thread::Current());
 779   mirror::Class* JavaLangObject = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
 780   AssertObjectClass(JavaLangObject);
 781
 782   StackHandleScope<1> hs(soa.Self());
 783   Handle<mirror::ClassLoader> class_loader(
 784       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("MyClass"))));
 785   AssertNonExistentClass("LMyClass;");
 786   mirror::Class* MyClass = class_linker_->FindClass(soa.Self(), "LMyClass;", class_loader);
 787   ASSERT_TRUE(MyClass != nullptr);
 788   ASSERT_TRUE(MyClass->GetClass() != nullptr);
 789   ASSERT_EQ(MyClass->GetClass(), MyClass->GetClass()->GetClass());
 790   EXPECT_EQ(JavaLangObject, MyClass->GetClass()->GetSuperClass());
 791   std::string temp;
 792   ASSERT_STREQ(MyClass->GetDescriptor(&temp), "LMyClass;");
 793   EXPECT_TRUE(MyClass->GetSuperClass() == JavaLangObject);
 794   EXPECT_TRUE(MyClass->HasSuperClass());
 795   EXPECT_EQ(class_loader.Get(), MyClass->GetClassLoader());
 796   EXPECT_EQ(mirror::Class::kStatusResolved, MyClass->GetStatus());
 797   EXPECT_FALSE(MyClass->IsErroneous());
 798   EXPECT_TRUE(MyClass->IsLoaded());
 799   EXPECT_TRUE(MyClass->IsResolved());
 800   EXPECT_FALSE(MyClass->IsVerified());
 801   EXPECT_FALSE(MyClass->IsInitialized());
 802   EXPECT_FALSE(MyClass->IsArrayInstance());
 803   EXPECT_FALSE(MyClass->IsArrayClass());
 804   EXPECT_TRUE(MyClass->GetComponentType() == nullptr);
 805   EXPECT_FALSE(MyClass->IsInterface());
 806   EXPECT_FALSE(MyClass->IsPublic());
 807   EXPECT_FALSE(MyClass->IsFinal());
 808   EXPECT_FALSE(MyClass->IsPrimitive());
 809   EXPECT_FALSE(MyClass->IsSynthetic());
 810   EXPECT_EQ(1U, MyClass->NumDirectMethods());
 811   EXPECT_EQ(0U, MyClass->NumVirtualMethods());
 812   EXPECT_EQ(0U, MyClass->NumInstanceFields());
 813   EXPECT_EQ(0U, MyClass->NumStaticFields());
 814   EXPECT_EQ(0U, MyClass->NumDirectInterfaces());
 815
 816   EXPECT_EQ(JavaLangObject->GetClass()->GetClass(), MyClass->GetClass()->GetClass());
 817
 818   // created by class_linker
 819   AssertArrayClass("[C", "C", nullptr);
 820   AssertArrayClass("[Ljava/lang/Object;", "Ljava/lang/Object;", nullptr);
 821   // synthesized on the fly
 822   AssertArrayClass("[[C", "[C", nullptr);
 823   AssertArrayClass("[[[LMyClass;", "[[LMyClass;", class_loader.Get());
 824   // or not available at all
 825   AssertNonExistentClass("[[[[LNonExistentClass;");
 826 }
 827
 828 TEST_F(ClassLinkerTest, LibCore) {
 829   ScopedObjectAccess soa(Thread::Current());
 830   ASSERT_TRUE(java_lang_dex_file_ != nullptr);
 831   AssertDexFile(*java_lang_dex_file_, nullptr);
 832 }
 833
 834 // The first reference array element must be a multiple of 4 bytes from the
 835 // start of the object
 836 TEST_F(ClassLinkerTest, ValidateObjectArrayElementsOffset) {
 837   ScopedObjectAccess soa(Thread::Current());
 838   mirror::Class* array_class = class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/String;");
 839   mirror::ObjectArray<mirror::String>* array =
 840       mirror::ObjectArray<mirror::String>::Alloc(soa.Self(), array_class, 0);
 841   uintptr_t data_offset =
 842       reinterpret_cast<uintptr_t>(array->GetRawData(sizeof(mirror::HeapReference<mirror::String>),
 843                                                     0));
 844   if (sizeof(mirror::HeapReference<mirror::String>) == sizeof(int32_t)) {
 845     EXPECT_TRUE(IsAligned<4>(data_offset));  // Check 4 byte alignment.
 846   } else {
 847     EXPECT_TRUE(IsAligned<8>(data_offset));  // Check 8 byte alignment.
 848   }
 849 }
 850
 851 TEST_F(ClassLinkerTest, ValidatePrimitiveArrayElementsOffset) {
 852   ScopedObjectAccess soa(Thread::Current());
 853   StackHandleScope<5> hs(soa.Self());
 854   Handle<mirror::LongArray> long_array(hs.NewHandle(mirror::LongArray::Alloc(soa.Self(), 0)));
 855   EXPECT_EQ(class_linker_->FindSystemClass(soa.Self(), "[J"), long_array->GetClass());
 856   uintptr_t data_offset = reinterpret_cast<uintptr_t>(long_array->GetData());
 857   EXPECT_TRUE(IsAligned<8>(data_offset));  // Longs require 8 byte alignment
 858
 859   Handle<mirror::DoubleArray> double_array(hs.NewHandle(mirror::DoubleArray::Alloc(soa.Self(), 0)));
 860   EXPECT_EQ(class_linker_->FindSystemClass(soa.Self(), "[D"), double_array->GetClass());
 861   data_offset = reinterpret_cast<uintptr_t>(double_array->GetData());
 862   EXPECT_TRUE(IsAligned<8>(data_offset));  // Doubles require 8 byte alignment
 863
 864   Handle<mirror::IntArray> int_array(hs.NewHandle(mirror::IntArray::Alloc(soa.Self(), 0)));
 865   EXPECT_EQ(class_linker_->FindSystemClass(soa.Self(), "[I"), int_array->GetClass());
 866   data_offset = reinterpret_cast<uintptr_t>(int_array->GetData());
 867   EXPECT_TRUE(IsAligned<4>(data_offset));  // Ints require 4 byte alignment
 868
 869   Handle<mirror::CharArray> char_array(hs.NewHandle(mirror::CharArray::Alloc(soa.Self(), 0)));
 870   EXPECT_EQ(class_linker_->FindSystemClass(soa.Self(), "[C"), char_array->GetClass());
 871   data_offset = reinterpret_cast<uintptr_t>(char_array->GetData());
 872   EXPECT_TRUE(IsAligned<2>(data_offset));  // Chars require 2 byte alignment
 873
 874   Handle<mirror::ShortArray> short_array(hs.NewHandle(mirror::ShortArray::Alloc(soa.Self(), 0)));
 875   EXPECT_EQ(class_linker_->FindSystemClass(soa.Self(), "[S"), short_array->GetClass());
 876   data_offset = reinterpret_cast<uintptr_t>(short_array->GetData());
 877   EXPECT_TRUE(IsAligned<2>(data_offset));  // Shorts require 2 byte alignment
 878
 879   // Take it as given that bytes and booleans have byte alignment
 880 }
 881
 882 TEST_F(ClassLinkerTest, ValidateBoxedTypes) {
 883   // Validate that the "value" field is always the 0th field in each of java.lang's box classes.
 884   // This lets UnboxPrimitive avoid searching for the field by name at runtime.
 885   ScopedObjectAccess soa(Thread::Current());
 886   ScopedNullHandle<mirror::ClassLoader> class_loader;
 887   mirror::Class* c;
 888   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Boolean;", class_loader);
 889   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 890   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Byte;", class_loader);
 891   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 892   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Character;", class_loader);
 893   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 894   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Double;", class_loader);
 895   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 896   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Float;", class_loader);
 897   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 898   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Integer;", class_loader);
 899   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 900   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Long;", class_loader);
 901   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 902   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Short;", class_loader);
 903   EXPECT_STREQ("value", c->GetIFieldsPtr()->At(0).GetName());
 904 }
 905
 906 TEST_F(ClassLinkerTest, TwoClassLoadersOneClass) {
 907   ScopedObjectAccess soa(Thread::Current());
 908   StackHandleScope<2> hs(soa.Self());
 909   Handle<mirror::ClassLoader> class_loader_1(
 910       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("MyClass"))));
 911   Handle<mirror::ClassLoader> class_loader_2(
 912       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("MyClass"))));
 913   mirror::Class* MyClass_1 = class_linker_->FindClass(soa.Self(), "LMyClass;", class_loader_1);
 914   mirror::Class* MyClass_2 = class_linker_->FindClass(soa.Self(), "LMyClass;", class_loader_2);
 915   EXPECT_TRUE(MyClass_1 != nullptr);
 916   EXPECT_TRUE(MyClass_2 != nullptr);
 917   EXPECT_NE(MyClass_1, MyClass_2);
 918 }
 919
 920 TEST_F(ClassLinkerTest, StaticFields) {
 921   ScopedObjectAccess soa(Thread::Current());
 922   StackHandleScope<2> hs(soa.Self());
 923   Handle<mirror::ClassLoader> class_loader(
 924       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("Statics"))));
 925   Handle<mirror::Class> statics(
 926       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LStatics;", class_loader)));
 927   class_linker_->EnsureInitialized(soa.Self(), statics, true, true);
 928
 929   // Static final primitives that are initialized by a compile-time constant
 930   // expression resolve to a copy of a constant value from the constant pool.
 931   // So <clinit> should be null.
 932   ArtMethod* clinit = statics->FindDirectMethod("<clinit>", "()V", sizeof(void*));
 933   EXPECT_TRUE(clinit == nullptr);
 934
 935   EXPECT_EQ(9U, statics->NumStaticFields());
 936
 937   ArtField* s0 = mirror::Class::FindStaticField(soa.Self(), statics, "s0", "Z");
 938   EXPECT_EQ(s0->GetTypeAsPrimitiveType(), Primitive::kPrimBoolean);
 939   EXPECT_EQ(true, s0->GetBoolean(statics.Get()));
 940   s0->SetBoolean<false>(statics.Get(), false);
 941
 942   ArtField* s1 = mirror::Class::FindStaticField(soa.Self(), statics, "s1", "B");
 943   EXPECT_EQ(s1->GetTypeAsPrimitiveType(), Primitive::kPrimByte);
 944   EXPECT_EQ(5, s1->GetByte(statics.Get()));
 945   s1->SetByte<false>(statics.Get(), 6);
 946
 947   ArtField* s2 = mirror::Class::FindStaticField(soa.Self(), statics, "s2", "C");
 948   EXPECT_EQ(s2->GetTypeAsPrimitiveType(), Primitive::kPrimChar);
 949   EXPECT_EQ('a', s2->GetChar(statics.Get()));
 950   s2->SetChar<false>(statics.Get(), 'b');
 951
 952   ArtField* s3 = mirror::Class::FindStaticField(soa.Self(), statics, "s3", "S");
 953   EXPECT_EQ(s3->GetTypeAsPrimitiveType(), Primitive::kPrimShort);
 954   EXPECT_EQ(-536, s3->GetShort(statics.Get()));
 955   s3->SetShort<false>(statics.Get(), -535);
 956
 957   ArtField* s4 = mirror::Class::FindStaticField(soa.Self(), statics, "s4", "I");
 958   EXPECT_EQ(s4->GetTypeAsPrimitiveType(), Primitive::kPrimInt);
 959   EXPECT_EQ(2000000000, s4->GetInt(statics.Get()));
 960   s4->SetInt<false>(statics.Get(), 2000000001);
 961
 962   ArtField* s5 = mirror::Class::FindStaticField(soa.Self(), statics, "s5", "J");
 963   EXPECT_EQ(s5->GetTypeAsPrimitiveType(), Primitive::kPrimLong);
 964   EXPECT_EQ(0x1234567890abcdefLL, s5->GetLong(statics.Get()));
 965   s5->SetLong<false>(statics.Get(), INT64_C(0x34567890abcdef12));
 966
 967   ArtField* s6 = mirror::Class::FindStaticField(soa.Self(), statics, "s6", "F");
 968   EXPECT_EQ(s6->GetTypeAsPrimitiveType(), Primitive::kPrimFloat);
 969   EXPECT_DOUBLE_EQ(0.5, s6->GetFloat(statics.Get()));
 970   s6->SetFloat<false>(statics.Get(), 0.75);
 971
 972   ArtField* s7 = mirror::Class::FindStaticField(soa.Self(), statics, "s7", "D");
 973   EXPECT_EQ(s7->GetTypeAsPrimitiveType(), Primitive::kPrimDouble);
 974   EXPECT_DOUBLE_EQ(16777217.0, s7->GetDouble(statics.Get()));
 975   s7->SetDouble<false>(statics.Get(), 16777219);
 976
 977   ArtField* s8 = mirror::Class::FindStaticField(soa.Self(), statics, "s8",
 978                                                         "Ljava/lang/String;");
 979   EXPECT_EQ(s8->GetTypeAsPrimitiveType(), Primitive::kPrimNot);
 980   EXPECT_TRUE(s8->GetObject(statics.Get())->AsString()->Equals("android"));
 981   s8->SetObject<false>(s8->GetDeclaringClass(),
 982                        mirror::String::AllocFromModifiedUtf8(soa.Self(), "robot"));
 983
 984   // TODO: Remove EXPECT_FALSE when GCC can handle EXPECT_EQ
 985   // http://code.google.com/p/googletest/issues/detail?id=322
 986   EXPECT_FALSE(s0->GetBoolean(statics.Get()));
 987   EXPECT_EQ(6, s1->GetByte(statics.Get()));
 988   EXPECT_EQ('b', s2->GetChar(statics.Get()));
 989   EXPECT_EQ(-535, s3->GetShort(statics.Get()));
 990   EXPECT_EQ(2000000001, s4->GetInt(statics.Get()));
 991   EXPECT_EQ(INT64_C(0x34567890abcdef12), s5->GetLong(statics.Get()));
 992   EXPECT_FLOAT_EQ(0.75, s6->GetFloat(statics.Get()));
 993   EXPECT_DOUBLE_EQ(16777219.0, s7->GetDouble(statics.Get()));
 994   EXPECT_TRUE(s8->GetObject(statics.Get())->AsString()->Equals("robot"));
 995 }
 996
 997 TEST_F(ClassLinkerTest, Interfaces) {
 998   ScopedObjectAccess soa(Thread::Current());
 999   StackHandleScope<6> hs(soa.Self());
1000   Handle<mirror::ClassLoader> class_loader(
1001       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("Interfaces"))));
1002   Handle<mirror::Class> I(
1003       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LInterfaces$I;", class_loader)));
1004   Handle<mirror::Class> J(
1005       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LInterfaces$J;", class_loader)));
1006   Handle<mirror::Class> K(
1007       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LInterfaces$K;", class_loader)));
1008   Handle<mirror::Class> A(
1009       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LInterfaces$A;", class_loader)));
1010   Handle<mirror::Class> B(
1011       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LInterfaces$B;", class_loader)));
1012   EXPECT_TRUE(I->IsAssignableFrom(A.Get()));
1013   EXPECT_TRUE(J->IsAssignableFrom(A.Get()));
1014   EXPECT_TRUE(J->IsAssignableFrom(K.Get()));
1015   EXPECT_TRUE(K->IsAssignableFrom(B.Get()));
1016   EXPECT_TRUE(J->IsAssignableFrom(B.Get()));
1017
1018   const Signature void_sig = I->GetDexCache()->GetDexFile()->CreateSignature("()V");
1019   ArtMethod* Ii = I->FindVirtualMethod("i", void_sig, sizeof(void*));
1020   ArtMethod* Jj1 = J->FindVirtualMethod("j1", void_sig, sizeof(void*));
1021   ArtMethod* Jj2 = J->FindVirtualMethod("j2", void_sig, sizeof(void*));
1022   ArtMethod* Kj1 = K->FindInterfaceMethod("j1", void_sig, sizeof(void*));
1023   ArtMethod* Kj2 = K->FindInterfaceMethod("j2", void_sig, sizeof(void*));
1024   ArtMethod* Kk = K->FindInterfaceMethod("k", void_sig, sizeof(void*));
1025   ArtMethod* Ai = A->FindVirtualMethod("i", void_sig, sizeof(void*));
1026   ArtMethod* Aj1 = A->FindVirtualMethod("j1", void_sig, sizeof(void*));
1027   ArtMethod* Aj2 = A->FindVirtualMethod("j2", void_sig, sizeof(void*));
1028   ASSERT_TRUE(Ii != nullptr);
1029   ASSERT_TRUE(Jj1 != nullptr);
1030   ASSERT_TRUE(Jj2 != nullptr);
1031   ASSERT_TRUE(Kj1 != nullptr);
1032   ASSERT_TRUE(Kj2 != nullptr);
1033   ASSERT_TRUE(Kk != nullptr);
1034   ASSERT_TRUE(Ai != nullptr);
1035   ASSERT_TRUE(Aj1 != nullptr);
1036   ASSERT_TRUE(Aj2 != nullptr);
1037   EXPECT_NE(Ii, Ai);
1038   EXPECT_NE(Jj1, Aj1);
1039   EXPECT_NE(Jj2, Aj2);
1040   EXPECT_EQ(Kj1, Jj1);
1041   EXPECT_EQ(Kj2, Jj2);
1042   EXPECT_EQ(Ai, A->FindVirtualMethodForInterface(Ii, sizeof(void*)));
1043   EXPECT_EQ(Aj1, A->FindVirtualMethodForInterface(Jj1, sizeof(void*)));
1044   EXPECT_EQ(Aj2, A->FindVirtualMethodForInterface(Jj2, sizeof(void*)));
1045   EXPECT_EQ(Ai, A->FindVirtualMethodForVirtualOrInterface(Ii, sizeof(void*)));
1046   EXPECT_EQ(Aj1, A->FindVirtualMethodForVirtualOrInterface(Jj1, sizeof(void*)));
1047   EXPECT_EQ(Aj2, A->FindVirtualMethodForVirtualOrInterface(Jj2, sizeof(void*)));
1048
1049   ArtField* Afoo = mirror::Class::FindStaticField(soa.Self(), A, "foo", "Ljava/lang/String;");
1050   ArtField* Bfoo = mirror::Class::FindStaticField(soa.Self(), B, "foo", "Ljava/lang/String;");
1051   ArtField* Jfoo = mirror::Class::FindStaticField(soa.Self(), J, "foo", "Ljava/lang/String;");
1052   ArtField* Kfoo = mirror::Class::FindStaticField(soa.Self(), K, "foo", "Ljava/lang/String;");
1053   ASSERT_TRUE(Afoo != nullptr);
1054   EXPECT_EQ(Afoo, Bfoo);
1055   EXPECT_EQ(Afoo, Jfoo);
1056   EXPECT_EQ(Afoo, Kfoo);
1057 }
1058
1059 TEST_F(ClassLinkerTest, ResolveVerifyAndClinit) {
1060   // pretend we are trying to get the static storage for the StaticsFromCode class.
1061
1062   // case 1, get the uninitialized storage from StaticsFromCode.<clinit>
1063   // case 2, get the initialized storage from StaticsFromCode.getS0
1064
1065   ScopedObjectAccess soa(Thread::Current());
1066   jobject jclass_loader = LoadDex("StaticsFromCode");
1067   const DexFile* dex_file = GetFirstDexFile(jclass_loader);
1068   StackHandleScope<1> hs(soa.Self());
1069   Handle<mirror::ClassLoader> class_loader(
1070       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(jclass_loader)));
1071   mirror::Class* klass = class_linker_->FindClass(soa.Self(), "LStaticsFromCode;", class_loader);
1072   ArtMethod* clinit = klass->FindClassInitializer(sizeof(void*));
1073   ArtMethod* getS0 = klass->FindDirectMethod("getS0", "()Ljava/lang/Object;", sizeof(void*));
1074   const DexFile::TypeId* type_id = dex_file->FindTypeId("LStaticsFromCode;");
1075   ASSERT_TRUE(type_id != nullptr);
1076   uint32_t type_idx = dex_file->GetIndexForTypeId(*type_id);
1077   mirror::Class* uninit = ResolveVerifyAndClinit(type_idx, clinit, soa.Self(), true, false);
1078   EXPECT_TRUE(uninit != nullptr);
1079   EXPECT_FALSE(uninit->IsInitialized());
1080   mirror::Class* init = ResolveVerifyAndClinit(type_idx, getS0, soa.Self(), true, false);
1081   EXPECT_TRUE(init != nullptr);
1082   EXPECT_TRUE(init->IsInitialized());
1083 }
1084
1085 TEST_F(ClassLinkerTest, FinalizableBit) {
1086   ScopedObjectAccess soa(Thread::Current());
1087   mirror::Class* c;
1088
1089   // Object has a finalize method, but we know it's empty.
1090   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
1091   EXPECT_FALSE(c->IsFinalizable());
1092
1093   // Enum has a finalize method to prevent its subclasses from implementing one.
1094   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Enum;");
1095   EXPECT_FALSE(c->IsFinalizable());
1096
1097   // RoundingMode is an enum.
1098   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/math/RoundingMode;");
1099   EXPECT_FALSE(c->IsFinalizable());
1100
1101   // RandomAccessFile extends Object and overrides finalize.
1102   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/io/RandomAccessFile;");
1103   EXPECT_TRUE(c->IsFinalizable());
1104
1105   // FileInputStream is finalizable and extends InputStream which isn't.
1106   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/io/InputStream;");
1107   EXPECT_FALSE(c->IsFinalizable());
1108   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/io/FileInputStream;");
1109   EXPECT_TRUE(c->IsFinalizable());
1110
1111   // ScheduledThreadPoolExecutor doesn't have a finalize method but
1112   // extends ThreadPoolExecutor which does.
1113   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/util/concurrent/ThreadPoolExecutor;");
1114   EXPECT_TRUE(c->IsFinalizable());
1115   c = class_linker_->FindSystemClass(soa.Self(), "Ljava/util/concurrent/ScheduledThreadPoolExecutor;");
1116   EXPECT_TRUE(c->IsFinalizable());
1117 }
1118
1119 TEST_F(ClassLinkerTest, ClassRootDescriptors) {
1120   ScopedObjectAccess soa(Thread::Current());
1121   std::string temp;
1122   for (int i = 0; i < ClassLinker::kClassRootsMax; i++) {
1123     mirror::Class* klass = class_linker_->GetClassRoot(ClassLinker::ClassRoot(i));
1124     EXPECT_GT(strlen(klass->GetDescriptor(&temp)), 0U);
1125     EXPECT_STREQ(klass->GetDescriptor(&temp),
1126                  class_linker_->GetClassRootDescriptor(ClassLinker::ClassRoot(i))) << " i = " << i;
1127   }
1128 }
1129
1130 TEST_F(ClassLinkerTest, ValidatePredefinedClassSizes) {
1131   ScopedObjectAccess soa(Thread::Current());
1132   ScopedNullHandle<mirror::ClassLoader> class_loader;
1133   mirror::Class* c;
1134
1135   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Class;", class_loader);
1136   ASSERT_TRUE(c != nullptr);
1137   EXPECT_EQ(c->GetClassSize(), mirror::Class::ClassClassSize(sizeof(void*)));
1138
1139   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/Object;", class_loader);
1140   ASSERT_TRUE(c != nullptr);
1141   EXPECT_EQ(c->GetClassSize(), mirror::Object::ClassSize(sizeof(void*)));
1142
1143   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/String;", class_loader);
1144   ASSERT_TRUE(c != nullptr);
1145   EXPECT_EQ(c->GetClassSize(), mirror::String::ClassSize(sizeof(void*)));
1146
1147   c = class_linker_->FindClass(soa.Self(), "Ljava/lang/DexCache;", class_loader);
1148   ASSERT_TRUE(c != nullptr);
1149   EXPECT_EQ(c->GetClassSize(), mirror::DexCache::ClassSize(sizeof(void*)));
1150 }
1151
1152 static void CheckMethod(ArtMethod* method, bool verified)
1153     SHARED_REQUIRES(Locks::mutator_lock_) {
1154   if (!method->IsNative() && !method->IsAbstract()) {
1155     EXPECT_EQ((method->GetAccessFlags() & kAccSkipAccessChecks) != 0U, verified)
1156         << PrettyMethod(method, true);
1157   }
1158 }
1159
1160 static void CheckVerificationAttempted(mirror::Class* c, bool preverified)
1161     SHARED_REQUIRES(Locks::mutator_lock_) {
1162   EXPECT_EQ((c->GetAccessFlags() & kAccVerificationAttempted) != 0U, preverified)
1163       << "Class " << PrettyClass(c) << " not as expected";
1164   for (auto& m : c->GetMethods(sizeof(void*))) {
1165     CheckMethod(&m, preverified);
1166   }
1167 }
1168
1169 TEST_F(ClassLinkerTest, Preverified_InitializedBoot) {
1170   ScopedObjectAccess soa(Thread::Current());
1171
1172   mirror::Class* JavaLangObject = class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
1173   ASSERT_TRUE(JavaLangObject != nullptr);
1174   EXPECT_TRUE(JavaLangObject->IsInitialized()) << "Not testing already initialized class from the "
1175                                                   "core";
1176   CheckVerificationAttempted(JavaLangObject, true);
1177 }
1178
1179 TEST_F(ClassLinkerTest, Preverified_UninitializedBoot) {
1180   ScopedObjectAccess soa(Thread::Current());
1181
1182   StackHandleScope<1> hs(soa.Self());
1183
1184   Handle<mirror::Class> security_manager(hs.NewHandle(class_linker_->FindSystemClass(
1185       soa.Self(), "Ljava/lang/SecurityManager;")));
1186   EXPECT_FALSE(security_manager->IsInitialized()) << "Not testing uninitialized class from the "
1187                                                      "core";
1188
1189   CheckVerificationAttempted(security_manager.Get(), false);
1190
1191   class_linker_->EnsureInitialized(soa.Self(), security_manager, true, true);
1192   CheckVerificationAttempted(security_manager.Get(), true);
1193 }
1194
1195 TEST_F(ClassLinkerTest, Preverified_App) {
1196   ScopedObjectAccess soa(Thread::Current());
1197
1198   StackHandleScope<2> hs(soa.Self());
1199   Handle<mirror::ClassLoader> class_loader(
1200       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("Statics"))));
1201   Handle<mirror::Class> statics(
1202       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LStatics;", class_loader)));
1203
1204   CheckVerificationAttempted(statics.Get(), false);
1205
1206   class_linker_->EnsureInitialized(soa.Self(), statics, true, true);
1207   CheckVerificationAttempted(statics.Get(), true);
1208 }
1209
1210 TEST_F(ClassLinkerTest, IsBootStrapClassLoaded) {
1211   ScopedObjectAccess soa(Thread::Current());
1212
1213   StackHandleScope<3> hs(soa.Self());
1214   Handle<mirror::ClassLoader> class_loader(
1215       hs.NewHandle(soa.Decode<mirror::ClassLoader*>(LoadDex("Statics"))));
1216
1217   // java.lang.Object is a bootstrap class.
1218   Handle<mirror::Class> jlo_class(
1219       hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "Ljava/lang/Object;")));
1220   ASSERT_TRUE(jlo_class.Get() != nullptr);
1221   EXPECT_TRUE(jlo_class.Get()->IsBootStrapClassLoaded());
1222
1223   // Statics is not a bootstrap class.
1224   Handle<mirror::Class> statics(
1225       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LStatics;", class_loader)));
1226   ASSERT_TRUE(statics.Get() != nullptr);
1227   EXPECT_FALSE(statics.Get()->IsBootStrapClassLoaded());
1228 }
1229
1230 // Regression test for b/26799552.
1231 TEST_F(ClassLinkerTest, RegisterDexFileName) {
1232   ScopedObjectAccess soa(Thread::Current());
1233   StackHandleScope<2> hs(soa.Self());
1234   ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
1235   MutableHandle<mirror::DexCache> dex_cache(hs.NewHandle<mirror::DexCache>(nullptr));
1236   {
1237     ReaderMutexLock mu(soa.Self(), *class_linker->DexLock());
1238     for (const ClassLinker::DexCacheData& data : class_linker->GetDexCachesData()) {
1239       dex_cache.Assign(down_cast<mirror::DexCache*>(soa.Self()->DecodeJObject(data.weak_root)));
1240       if (dex_cache.Get() != nullptr) {
1241         break;
1242       }
1243     }
1244     ASSERT_TRUE(dex_cache.Get() != nullptr);
1245   }
1246   // Make a copy of the dex cache and change the name.
1247   dex_cache.Assign(dex_cache->Clone(soa.Self())->AsDexCache());
1248   const uint16_t data[] = { 0x20AC, 0x20A1 };
1249   Handle<mirror::String> location(hs.NewHandle(mirror::String::AllocFromUtf16(soa.Self(),
1250                                                                               arraysize(data),
1251                                                                               data)));
1252   dex_cache->SetLocation(location.Get());
1253   const DexFile* old_dex_file = dex_cache->GetDexFile();
1254
1255   std::unique_ptr<DexFile> dex_file(new DexFile(old_dex_file->Begin(),
1256                                                 old_dex_file->Size(),
1257                                                 location->ToModifiedUtf8(),
1258                                                 0u,
1259                                                 nullptr,
1260                                                 nullptr));
1261   {
1262     WriterMutexLock mu(soa.Self(), *class_linker->DexLock());
1263     // Check that inserting with a UTF16 name works.
1264     class_linker->RegisterDexFileLocked(*dex_file, dex_cache);
1265   }
1266 }
1267
1268 }  // namespace art