| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_SRC_RUNTIME_SUPPORT_H_ |
| #define ART_SRC_RUNTIME_SUPPORT_H_ |
| |
| #include "class_linker.h" |
| #include "dex_file.h" |
| #include "dex_verifier.h" |
| #include "invoke_type.h" |
| #include "object.h" |
| #include "object_utils.h" |
| #include "thread.h" |
| |
| extern "C" void art_proxy_invoke_handler(); |
| extern "C" void art_work_around_app_jni_bugs(); |
| |
| namespace art { |
| |
| class Array; |
| class Class; |
| class Field; |
| class Method; |
| class Object; |
| |
| // Helpers to give consistent descriptive exception messages |
| void ThrowNewIllegalAccessErrorClass(Thread* self, Class* referrer, Class* accessed); |
| void ThrowNewIllegalAccessErrorClassForMethodDispatch(Thread* self, Class* referrer, |
| Class* accessed, |
| const Method* caller, |
| const Method* called, |
| InvokeType type); |
| void ThrowNewIncompatibleClassChangeErrorClassForInterfaceDispatch(Thread* self, |
| const Method* referrer, |
| const Method* interface_method, |
| Object* this_object); |
| void ThrowNewIllegalAccessErrorField(Thread* self, Class* referrer, Field* accessed); |
| void ThrowNewIllegalAccessErrorFinalField(Thread* self, const Method* referrer, Field* accessed); |
| |
| void ThrowNewIllegalAccessErrorMethod(Thread* self, Class* referrer, Method* accessed); |
| void ThrowNullPointerExceptionForFieldAccess(Thread* self, Field* field, bool is_read); |
| void ThrowNullPointerExceptionForMethodAccess(Thread* self, Method* caller, uint32_t method_idx, |
| InvokeType type); |
| |
| std::string FieldNameFromIndex(const Method* method, uint32_t ref, |
| verifier::VerifyErrorRefType ref_type, bool access); |
| std::string MethodNameFromIndex(const Method* method, uint32_t ref, |
| verifier::VerifyErrorRefType ref_type, bool access); |
| |
| // Given the context of a calling Method, use its DexCache to resolve a type to a Class. If it |
| // cannot be resolved, throw an error. If it can, use it to create an instance. |
| // When verification/compiler hasn't been able to verify access, optionally perform an access |
| // check. |
| static inline Object* AllocObjectFromCode(uint32_t type_idx, Method* method, Thread* self, |
| bool access_check) { |
| Class* klass = method->GetDexCacheResolvedTypes()->Get(type_idx); |
| Runtime* runtime = Runtime::Current(); |
| if (UNLIKELY(klass == NULL)) { |
| klass = runtime->GetClassLinker()->ResolveType(type_idx, method); |
| if (klass == NULL) { |
| DCHECK(self->IsExceptionPending()); |
| return NULL; // Failure |
| } |
| } |
| if (access_check) { |
| if (UNLIKELY(!klass->IsInstantiable())) { |
| self->ThrowNewException("Ljava/lang/InstantiationError;", |
| PrettyDescriptor(klass).c_str()); |
| return NULL; // Failure |
| } |
| Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowNewIllegalAccessErrorClass(self, referrer, klass); |
| return NULL; // Failure |
| } |
| } |
| if (!runtime->GetClassLinker()->EnsureInitialized(klass, true, true)) { |
| DCHECK(self->IsExceptionPending()); |
| return NULL; // Failure |
| } |
| return klass->AllocObject(); |
| } |
| |
| // Given the context of a calling Method, use its DexCache to resolve a type to an array Class. If |
| // it cannot be resolved, throw an error. If it can, use it to create an array. |
| // When verification/compiler hasn't been able to verify access, optionally perform an access |
| // check. |
| static inline Array* AllocArrayFromCode(uint32_t type_idx, Method* method, int32_t component_count, |
| Thread* self, bool access_check) { |
| if (UNLIKELY(component_count < 0)) { |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/NegativeArraySizeException;", "%d", |
| component_count); |
| return NULL; // Failure |
| } |
| Class* klass = method->GetDexCacheResolvedTypes()->Get(type_idx); |
| if (UNLIKELY(klass == NULL)) { // Not in dex cache so try to resolve |
| klass = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, method); |
| if (klass == NULL) { // Error |
| DCHECK(Thread::Current()->IsExceptionPending()); |
| return NULL; // Failure |
| } |
| CHECK(klass->IsArrayClass()) << PrettyClass(klass); |
| } |
| if (access_check) { |
| Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowNewIllegalAccessErrorClass(self, referrer, klass); |
| return NULL; // Failure |
| } |
| } |
| return Array::Alloc(klass, component_count); |
| } |
| |
| extern Array* CheckAndAllocArrayFromCode(uint32_t type_idx, Method* method, int32_t component_count, |
| Thread* self, bool access_check); |
| |
| extern Field* FindFieldFromCode(uint32_t field_idx, const Method* referrer, Thread* self, |
| bool is_static, bool is_primitive, bool is_set, |
| size_t expected_size); |
| |
| // Fast path field resolution that can't throw exceptions |
| static inline Field* FindFieldFast(uint32_t field_idx, const Method* referrer, bool is_primitive, |
| size_t expected_size, bool is_set) { |
| Field* resolved_field = referrer->GetDeclaringClass()->GetDexCache()->GetResolvedField(field_idx); |
| if (UNLIKELY(resolved_field == NULL)) { |
| return NULL; |
| } |
| Class* fields_class = resolved_field->GetDeclaringClass(); |
| // Check class is initiliazed or initializing |
| if (UNLIKELY(!fields_class->IsInitializing())) { |
| return NULL; |
| } |
| Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(fields_class) || |
| !referring_class->CanAccessMember(fields_class, |
| resolved_field->GetAccessFlags()) || |
| (is_set && resolved_field->IsFinal() && (fields_class != referring_class)))) { |
| // illegal access |
| return NULL; |
| } |
| FieldHelper fh(resolved_field); |
| if (UNLIKELY(fh.IsPrimitiveType() != is_primitive || |
| fh.FieldSize() != expected_size)) { |
| return NULL; |
| } |
| return resolved_field; |
| } |
| |
| // Fast path method resolution that can't throw exceptions |
| static inline Method* FindMethodFast(uint32_t method_idx, Object* this_object, const Method* referrer, |
| bool access_check, InvokeType type) { |
| bool is_direct = type == kStatic || type == kDirect; |
| if (UNLIKELY(this_object == NULL && !is_direct)) { |
| return NULL; |
| } |
| Method* resolved_method = |
| referrer->GetDeclaringClass()->GetDexCache()->GetResolvedMethod(method_idx); |
| if (UNLIKELY(resolved_method == NULL)) { |
| return NULL; |
| } |
| if (access_check) { |
| Class* methods_class = resolved_method->GetDeclaringClass(); |
| Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(methods_class) || |
| !referring_class->CanAccessMember(methods_class, |
| resolved_method->GetAccessFlags()))) { |
| // potential illegal access |
| return NULL; |
| } |
| } |
| if (type == kInterface) { // Most common form of slow path dispatch. |
| return this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); |
| } else if (is_direct) { |
| return resolved_method; |
| } else if (type == kSuper) { |
| return referrer->GetDeclaringClass()->GetSuperClass()->GetVTable()-> |
| Get(resolved_method->GetMethodIndex()); |
| } else { |
| DCHECK(type == kVirtual); |
| return this_object->GetClass()->GetVTable()->Get(resolved_method->GetMethodIndex()); |
| } |
| } |
| |
| extern Method* FindMethodFromCode(uint32_t method_idx, Object* this_object, const Method* referrer, |
| Thread* self, bool access_check, InvokeType type); |
| |
| extern Class* ResolveVerifyAndClinit(uint32_t type_idx, const Method* referrer, Thread* self, |
| bool can_run_clinit, bool verify_access); |
| |
| static inline String* ResolveStringFromCode(const Method* referrer, uint32_t string_idx) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| return class_linker->ResolveString(string_idx, referrer); |
| } |
| |
| } // namespace art |
| |
| #endif // ART_SRC_RUNTIME_SUPPORT_H_ |