| // Copyright 2012 Google Inc. All Rights Reserved. |
| |
| #include "runtime_support_common.h" |
| |
| |
| namespace art { |
| |
| // Helper function to allocate array for FILLED_NEW_ARRAY. |
| Array* CheckAndAllocArrayFromCode(uint32_t type_idx, Method* method, int32_t component_count, |
| Thread* self, bool access_check) { |
| if (UNLIKELY(component_count < 0)) { |
| self->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 |
| } |
| } |
| if (UNLIKELY(klass->IsPrimitive() && !klass->IsPrimitiveInt())) { |
| if (klass->IsPrimitiveLong() || klass->IsPrimitiveDouble()) { |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/RuntimeException;", |
| "Bad filled array request for type %s", |
| PrettyDescriptor(klass).c_str()); |
| } else { |
| Thread::Current()->ThrowNewExceptionF("Ljava/lang/InternalError;", |
| "Found type %s; filled-new-array not implemented for anything but \'int\'", |
| PrettyDescriptor(klass).c_str()); |
| } |
| return NULL; // Failure |
| } else { |
| if (access_check) { |
| Class* referrer = method->GetDeclaringClass(); |
| if (UNLIKELY(!referrer->CanAccess(klass))) { |
| ThrowNewIllegalAccessErrorClass(self, referrer, klass); |
| return NULL; // Failure |
| } |
| } |
| DCHECK(klass->IsArrayClass()) << PrettyClass(klass); |
| return Array::Alloc(klass, component_count); |
| } |
| } |
| |
| // Slow path field resolution and declaring class initialization |
| Field* FindFieldFromCode(uint32_t field_idx, const Method* referrer, Thread* self, |
| bool is_static, bool is_primitive, bool is_set, size_t expected_size) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| Field* resolved_field = class_linker->ResolveField(field_idx, referrer, is_static); |
| if (UNLIKELY(resolved_field == NULL)) { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind |
| return NULL; // failure |
| } else { |
| Class* fields_class = resolved_field->GetDeclaringClass(); |
| Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(fields_class))) { |
| ThrowNewIllegalAccessErrorClass(self, referring_class, fields_class); |
| return NULL; // failure |
| } else if (UNLIKELY(!referring_class->CanAccessMember(fields_class, |
| resolved_field->GetAccessFlags()))) { |
| ThrowNewIllegalAccessErrorField(self, referring_class, resolved_field); |
| return NULL; // failure |
| } else if (UNLIKELY(is_set && resolved_field->IsFinal() && (fields_class != referring_class))) { |
| ThrowNewIllegalAccessErrorFinalField(self, referrer, resolved_field); |
| return NULL; // failure |
| } else { |
| FieldHelper fh(resolved_field); |
| if (UNLIKELY(fh.IsPrimitiveType() != is_primitive || |
| fh.FieldSize() != expected_size)) { |
| self->ThrowNewExceptionF("Ljava/lang/NoSuchFieldError;", |
| "Attempted read of %zd-bit %s on field '%s'", |
| expected_size * (32 / sizeof(int32_t)), |
| is_primitive ? "primitive" : "non-primitive", |
| PrettyField(resolved_field, true).c_str()); |
| return NULL; // failure |
| } else if (!is_static) { |
| // instance fields must be being accessed on an initialized class |
| return resolved_field; |
| } else { |
| // If the class is already initializing, we must be inside <clinit>, or |
| // we'd still be waiting for the lock. |
| if (fields_class->IsInitializing()) { |
| return resolved_field; |
| } else if (Runtime::Current()->GetClassLinker()->EnsureInitialized(fields_class, true)) { |
| return resolved_field; |
| } else { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind |
| return NULL; // failure |
| } |
| } |
| } |
| } |
| } |
| |
| // Slow path method resolution |
| Method* FindMethodFromCode(uint32_t method_idx, Object* this_object, const Method* referrer, |
| Thread* self, bool access_check, InvokeType type) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| bool is_direct = type == kStatic || type == kDirect; |
| Method* resolved_method = class_linker->ResolveMethod(method_idx, referrer, is_direct); |
| if (UNLIKELY(resolved_method == NULL)) { |
| DCHECK(self->IsExceptionPending()); // Throw exception and unwind |
| return NULL; // failure |
| } else { |
| if (!access_check) { |
| if (is_direct) { |
| return resolved_method; |
| } else if (type == kInterface) { |
| Method* interface_method = |
| this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); |
| if (UNLIKELY(interface_method == NULL)) { |
| ThrowNewIncompatibleClassChangeErrorClassForInterfaceDispatch(self, referrer, |
| resolved_method, |
| this_object); |
| return NULL; // failure |
| } else { |
| return interface_method; |
| } |
| } else { |
| ObjectArray<Method>* vtable; |
| uint16_t vtable_index = resolved_method->GetMethodIndex(); |
| if (type == kSuper) { |
| vtable = referrer->GetDeclaringClass()->GetSuperClass()->GetVTable(); |
| } else { |
| vtable = this_object->GetClass()->GetVTable(); |
| } |
| // TODO: eliminate bounds check? |
| return vtable->Get(vtable_index); |
| } |
| } else { |
| 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()))) { |
| // The referring class can't access the resolved method, this may occur as a result of a |
| // protected method being made public by implementing an interface that re-declares the |
| // method public. Resort to the dex file to determine the correct class for the access check |
| const DexFile& dex_file = class_linker->FindDexFile(referring_class->GetDexCache()); |
| methods_class = class_linker->ResolveType(dex_file, |
| dex_file.GetMethodId(method_idx).class_idx_, |
| referring_class); |
| if (UNLIKELY(!referring_class->CanAccess(methods_class))) { |
| ThrowNewIllegalAccessErrorClassForMethodDispatch(self, referring_class, methods_class, |
| referrer, resolved_method, type); |
| return NULL; // failure |
| } else if (UNLIKELY(!referring_class->CanAccessMember(methods_class, |
| resolved_method->GetAccessFlags()))) { |
| ThrowNewIllegalAccessErrorMethod(self, referring_class, resolved_method); |
| return NULL; // failure |
| } |
| } |
| if (is_direct) { |
| return resolved_method; |
| } else if (type == kInterface) { |
| Method* interface_method = |
| this_object->GetClass()->FindVirtualMethodForInterface(resolved_method); |
| if (UNLIKELY(interface_method == NULL)) { |
| ThrowNewIncompatibleClassChangeErrorClassForInterfaceDispatch(self, referrer, |
| resolved_method, |
| this_object); |
| return NULL; // failure |
| } else { |
| return interface_method; |
| } |
| } else { |
| ObjectArray<Method>* vtable; |
| uint16_t vtable_index = resolved_method->GetMethodIndex(); |
| if (type == kSuper) { |
| Class* super_class = referring_class->GetSuperClass(); |
| if (LIKELY(super_class != NULL)) { |
| vtable = referring_class->GetSuperClass()->GetVTable(); |
| } else { |
| vtable = NULL; |
| } |
| } else { |
| vtable = this_object->GetClass()->GetVTable(); |
| } |
| if (LIKELY(vtable != NULL && |
| vtable_index < static_cast<uint32_t>(vtable->GetLength()))) { |
| return vtable->GetWithoutChecks(vtable_index); |
| } else { |
| // Behavior to agree with that of the verifier |
| self->ThrowNewExceptionF("Ljava/lang/NoSuchMethodError;", |
| "attempt to invoke %s method '%s' from '%s'" |
| " using incorrect form of method dispatch", |
| (type == kSuper ? "super class" : "virtual"), |
| PrettyMethod(resolved_method).c_str(), |
| PrettyMethod(referrer).c_str()); |
| return NULL; // failure |
| } |
| } |
| } |
| } |
| } |
| |
| } // namespace art |
