| /* |
| * 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. |
| */ |
| |
| #include "runtime_support.h" |
| |
| #include "ScopedLocalRef.h" |
| #include "well_known_classes.h" |
| |
| double art_l2d(int64_t l) { |
| return static_cast<double>(l); |
| } |
| |
| float art_l2f(int64_t l) { |
| return static_cast<float>(l); |
| } |
| |
| /* |
| * Float/double conversion requires clamping to min and max of integer form. If |
| * target doesn't support this normally, use these. |
| */ |
| int64_t art_d2l(double d) { |
| static const double kMaxLong = static_cast<double>(static_cast<int64_t>(0x7fffffffffffffffULL)); |
| static const double kMinLong = static_cast<double>(static_cast<int64_t>(0x8000000000000000ULL)); |
| if (d >= kMaxLong) { |
| return static_cast<int64_t>(0x7fffffffffffffffULL); |
| } else if (d <= kMinLong) { |
| return static_cast<int64_t>(0x8000000000000000ULL); |
| } else if (d != d) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int64_t>(d); |
| } |
| } |
| |
| int64_t art_f2l(float f) { |
| static const float kMaxLong = static_cast<float>(static_cast<int64_t>(0x7fffffffffffffffULL)); |
| static const float kMinLong = static_cast<float>(static_cast<int64_t>(0x8000000000000000ULL)); |
| if (f >= kMaxLong) { |
| return static_cast<int64_t>(0x7fffffffffffffffULL); |
| } else if (f <= kMinLong) { |
| return static_cast<int64_t>(0x8000000000000000ULL); |
| } else if (f != f) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int64_t>(f); |
| } |
| } |
| |
| int32_t art_d2i(double d) { |
| static const double kMaxInt = static_cast<double>(static_cast<int32_t>(0x7fffffffUL)); |
| static const double kMinInt = static_cast<double>(static_cast<int32_t>(0x80000000UL)); |
| if (d >= kMaxInt) { |
| return static_cast<int32_t>(0x7fffffffUL); |
| } else if (d <= kMinInt) { |
| return static_cast<int32_t>(0x80000000UL); |
| } else if (d != d) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int32_t>(d); |
| } |
| } |
| |
| int32_t art_f2i(float f) { |
| static const float kMaxInt = static_cast<float>(static_cast<int32_t>(0x7fffffffUL)); |
| static const float kMinInt = static_cast<float>(static_cast<int32_t>(0x80000000UL)); |
| if (f >= kMaxInt) { |
| return static_cast<int32_t>(0x7fffffffUL); |
| } else if (f <= kMinInt) { |
| return static_cast<int32_t>(0x80000000UL); |
| } else if (f != f) { // NaN case |
| return 0; |
| } else { |
| return static_cast<int32_t>(f); |
| } |
| } |
| |
| namespace art { |
| |
| void ThrowNewIllegalAccessErrorClass(Thread* self, |
| Class* referrer, |
| Class* accessed) { |
| self->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Illegal class access: '%s' -> '%s'", |
| PrettyDescriptor(referrer).c_str(), |
| PrettyDescriptor(accessed).c_str()); |
| } |
| |
| void ThrowNewIllegalAccessErrorClassForMethodDispatch(Thread* self, |
| Class* referrer, |
| Class* accessed, |
| const Method* caller, |
| const Method* called, |
| InvokeType type) { |
| self->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Illegal class access ('%s' -> '%s')" |
| "in attempt to invoke %s method '%s' from '%s'", |
| PrettyDescriptor(referrer).c_str(), |
| PrettyDescriptor(accessed).c_str(), |
| ToStr<InvokeType>(type).c_str(), |
| PrettyMethod(called).c_str(), |
| PrettyMethod(caller).c_str()); |
| } |
| |
| static void ThrowNewIncompatibleClassChangeErrorClassForInterfaceDispatch(Thread* self, |
| const Method* interface_method, |
| Object* this_object) |
| SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_) { |
| std::string interface_method_name(PrettyMethod(interface_method)); |
| if (this_object != NULL) { |
| std::string this_class_descriptor(PrettyDescriptor(this_object->GetClass())); |
| std::string interface_class_descriptor(PrettyDescriptor(interface_method->GetDeclaringClass())); |
| self->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;", |
| "Class '%s' does not implement interface '%s' in call to '%s'", |
| this_class_descriptor.c_str(), |
| interface_class_descriptor.c_str(), |
| interface_method_name.c_str()); |
| } else { |
| self->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;", |
| "Expected '%s' to be an interface method", |
| interface_method_name.c_str()); |
| } |
| } |
| |
| static void ThrowNewIncompatibleClassChangeErrorField(Thread* self, const Field* resolved_field, |
| bool is_static) |
| SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_) { |
| self->ThrowNewExceptionF("Ljava/lang/IncompatibleClassChangeError;", |
| "Expected '%s' to be a %s field", |
| PrettyField(resolved_field).c_str(), |
| is_static ? "static" : "instance"); |
| } |
| |
| void ThrowIncompatibleClassChangeError(InvokeType expected_type, InvokeType found_type, |
| Method* method) { |
| std::ostringstream msg; |
| msg << "The method '" << PrettyMethod(method) << "' was expected to be of type " |
| << expected_type << " but instead was found to be of type " << found_type; |
| ClassHelper kh(method->GetDeclaringClass()); |
| std::string location(kh.GetLocation()); |
| if (!location.empty()) { |
| msg << " (accessed from " << location << ")"; |
| } |
| Thread::Current()->ThrowNewException("Ljava/lang/IncompatibleClassChangeError;", |
| msg.str().c_str()); |
| } |
| |
| void ThrowNoSuchMethodError(InvokeType type, Class* c, const StringPiece& name, |
| const StringPiece& signature) { |
| ClassHelper kh(c); |
| std::ostringstream msg; |
| msg << "No " << type << " method " << name << signature |
| << " in class " << kh.GetDescriptor() << " or its superclasses"; |
| std::string location(kh.GetLocation()); |
| if (!location.empty()) { |
| msg << " (accessed from " << location << ")"; |
| } |
| Thread::Current()->ThrowNewException("Ljava/lang/NoSuchMethodError;", msg.str().c_str()); |
| } |
| |
| void ThrowNewIllegalAccessErrorField(Thread* self, |
| Class* referrer, |
| Field* accessed) { |
| self->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Field '%s' is inaccessible to class '%s'", |
| PrettyField(accessed, false).c_str(), |
| PrettyDescriptor(referrer).c_str()); |
| } |
| |
| void ThrowNewIllegalAccessErrorFinalField(Thread* self, |
| const Method* referrer, |
| Field* accessed) { |
| self->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Final field '%s' cannot be written to by method '%s'", |
| PrettyField(accessed, false).c_str(), |
| PrettyMethod(referrer).c_str()); |
| } |
| |
| void ThrowNewIllegalAccessErrorMethod(Thread* self, |
| Class* referrer, |
| Method* accessed) { |
| self->ThrowNewExceptionF("Ljava/lang/IllegalAccessError;", |
| "Method '%s' is inaccessible to class '%s'", |
| PrettyMethod(accessed).c_str(), |
| PrettyDescriptor(referrer).c_str()); |
| } |
| |
| void ThrowNullPointerExceptionForFieldAccess(Thread* self, |
| Field* field, |
| bool is_read) { |
| self->ThrowNewExceptionF("Ljava/lang/NullPointerException;", |
| "Attempt to %s field '%s' on a null object reference", |
| is_read ? "read from" : "write to", |
| PrettyField(field, true).c_str()); |
| } |
| |
| void ThrowNullPointerExceptionForMethodAccess(Thread* self, |
| Method* caller, |
| uint32_t method_idx, |
| InvokeType type) { |
| const DexFile& dex_file = |
| Runtime::Current()->GetClassLinker()->FindDexFile(caller->GetDeclaringClass()->GetDexCache()); |
| self->ThrowNewExceptionF("Ljava/lang/NullPointerException;", |
| "Attempt to invoke %s method '%s' on a null object reference", |
| ToStr<InvokeType>(type).c_str(), |
| PrettyMethod(method_idx, dex_file, true).c_str()); |
| } |
| |
| void ThrowNullPointerExceptionFromDexPC(Thread* self, Method* throw_method, uint32_t dex_pc) { |
| const DexFile::CodeItem* code = MethodHelper(throw_method).GetCodeItem(); |
| CHECK_LT(dex_pc, code->insns_size_in_code_units_); |
| const Instruction* instr = Instruction::At(&code->insns_[dex_pc]); |
| DecodedInstruction dec_insn(instr); |
| switch (instr->Opcode()) { |
| case Instruction::INVOKE_DIRECT: |
| case Instruction::INVOKE_DIRECT_RANGE: |
| ThrowNullPointerExceptionForMethodAccess(self, throw_method, dec_insn.vB, kDirect); |
| break; |
| case Instruction::INVOKE_VIRTUAL: |
| case Instruction::INVOKE_VIRTUAL_RANGE: |
| ThrowNullPointerExceptionForMethodAccess(self, throw_method, dec_insn.vB, kVirtual); |
| break; |
| case Instruction::IGET: |
| case Instruction::IGET_WIDE: |
| case Instruction::IGET_OBJECT: |
| case Instruction::IGET_BOOLEAN: |
| case Instruction::IGET_BYTE: |
| case Instruction::IGET_CHAR: |
| case Instruction::IGET_SHORT: { |
| Field* field = |
| Runtime::Current()->GetClassLinker()->ResolveField(dec_insn.vC, throw_method, false); |
| ThrowNullPointerExceptionForFieldAccess(self, field, true /* read */); |
| break; |
| } |
| case Instruction::IPUT: |
| case Instruction::IPUT_WIDE: |
| case Instruction::IPUT_OBJECT: |
| case Instruction::IPUT_BOOLEAN: |
| case Instruction::IPUT_BYTE: |
| case Instruction::IPUT_CHAR: |
| case Instruction::IPUT_SHORT: { |
| Field* field = |
| Runtime::Current()->GetClassLinker()->ResolveField(dec_insn.vC, throw_method, false); |
| ThrowNullPointerExceptionForFieldAccess(self, field, false /* write */); |
| break; |
| } |
| case Instruction::AGET: |
| case Instruction::AGET_WIDE: |
| case Instruction::AGET_OBJECT: |
| case Instruction::AGET_BOOLEAN: |
| case Instruction::AGET_BYTE: |
| case Instruction::AGET_CHAR: |
| case Instruction::AGET_SHORT: |
| self->ThrowNewException("Ljava/lang/NullPointerException;", |
| "Attempt to read from null array"); |
| break; |
| case Instruction::APUT: |
| case Instruction::APUT_WIDE: |
| case Instruction::APUT_OBJECT: |
| case Instruction::APUT_BOOLEAN: |
| case Instruction::APUT_BYTE: |
| case Instruction::APUT_CHAR: |
| case Instruction::APUT_SHORT: |
| self->ThrowNewException("Ljava/lang/NullPointerException;", |
| "Attempt to write to null array"); |
| break; |
| case Instruction::ARRAY_LENGTH: |
| self->ThrowNewException("Ljava/lang/NullPointerException;", |
| "Attempt to get length of null array"); |
| break; |
| default: { |
| const DexFile& dex_file = Runtime::Current()->GetClassLinker() |
| ->FindDexFile(throw_method->GetDeclaringClass()->GetDexCache()); |
| std::string message("Null pointer exception during instruction '"); |
| message += instr->DumpString(&dex_file); |
| message += "'"; |
| self->ThrowNewException("Ljava/lang/NullPointerException;", message.c_str()); |
| break; |
| } |
| } |
| } |
| |
| std::string FieldNameFromIndex(const Method* method, uint32_t ref, |
| verifier::VerifyErrorRefType ref_type, bool access) { |
| CHECK_EQ(static_cast<int>(ref_type), static_cast<int>(verifier::VERIFY_ERROR_REF_FIELD)); |
| |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| const DexFile& dex_file = class_linker->FindDexFile(method->GetDeclaringClass()->GetDexCache()); |
| |
| const DexFile::FieldId& id = dex_file.GetFieldId(ref); |
| std::string class_name(PrettyDescriptor(dex_file.GetFieldDeclaringClassDescriptor(id))); |
| const char* field_name = dex_file.StringDataByIdx(id.name_idx_); |
| if (!access) { |
| return class_name + "." + field_name; |
| } |
| |
| std::string result; |
| result += "tried to access field "; |
| result += class_name + "." + field_name; |
| result += " from class "; |
| result += PrettyDescriptor(method->GetDeclaringClass()); |
| return result; |
| } |
| |
| std::string MethodNameFromIndex(const Method* method, uint32_t ref, |
| verifier::VerifyErrorRefType ref_type, bool access) { |
| CHECK_EQ(static_cast<int>(ref_type), static_cast<int>(verifier::VERIFY_ERROR_REF_METHOD)); |
| |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| const DexFile& dex_file = class_linker->FindDexFile(method->GetDeclaringClass()->GetDexCache()); |
| |
| const DexFile::MethodId& id = dex_file.GetMethodId(ref); |
| std::string class_name(PrettyDescriptor(dex_file.GetMethodDeclaringClassDescriptor(id))); |
| const char* method_name = dex_file.StringDataByIdx(id.name_idx_); |
| if (!access) { |
| return class_name + "." + method_name; |
| } |
| |
| std::string result; |
| result += "tried to access method "; |
| result += class_name + "." + method_name + ":" + |
| dex_file.CreateMethodSignature(id.proto_idx_, NULL); |
| result += " from class "; |
| result += PrettyDescriptor(method->GetDeclaringClass()); |
| return result; |
| } |
| |
| static std::string ClassNameFromIndex(const Method* method, uint32_t ref, |
| verifier::VerifyErrorRefType ref_type, bool access) |
| SHARED_LOCKS_REQUIRED(GlobalSynchronization::mutator_lock_) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| const DexFile& dex_file = class_linker->FindDexFile(method->GetDeclaringClass()->GetDexCache()); |
| |
| uint16_t type_idx = 0; |
| if (ref_type == verifier::VERIFY_ERROR_REF_FIELD) { |
| const DexFile::FieldId& id = dex_file.GetFieldId(ref); |
| type_idx = id.class_idx_; |
| } else if (ref_type == verifier::VERIFY_ERROR_REF_METHOD) { |
| const DexFile::MethodId& id = dex_file.GetMethodId(ref); |
| type_idx = id.class_idx_; |
| } else if (ref_type == verifier::VERIFY_ERROR_REF_CLASS) { |
| type_idx = ref; |
| } else { |
| CHECK(false) << static_cast<int>(ref_type); |
| } |
| |
| std::string class_name(PrettyDescriptor(dex_file.StringByTypeIdx(type_idx))); |
| if (!access) { |
| return class_name; |
| } |
| |
| std::string result; |
| result += "tried to access class "; |
| result += class_name; |
| result += " from class "; |
| result += PrettyDescriptor(method->GetDeclaringClass()); |
| return result; |
| } |
| |
| void ThrowVerificationError(Thread* self, const Method* method, |
| int32_t kind, int32_t ref) { |
| verifier::VerifyErrorRefType ref_type = |
| static_cast<verifier::VerifyErrorRefType>(kind >> verifier::kVerifyErrorRefTypeShift); |
| |
| const char* exception_class = "Ljava/lang/VerifyError;"; |
| std::string msg; |
| |
| switch (static_cast<verifier::VerifyError>(kind & ~(0xff << verifier::kVerifyErrorRefTypeShift))) { |
| case verifier::VERIFY_ERROR_NO_CLASS: |
| exception_class = "Ljava/lang/NoClassDefFoundError;"; |
| msg = ClassNameFromIndex(method, ref, ref_type, false); |
| break; |
| case verifier::VERIFY_ERROR_NO_FIELD: |
| exception_class = "Ljava/lang/NoSuchFieldError;"; |
| msg = FieldNameFromIndex(method, ref, ref_type, false); |
| break; |
| case verifier::VERIFY_ERROR_NO_METHOD: |
| exception_class = "Ljava/lang/NoSuchMethodError;"; |
| msg = MethodNameFromIndex(method, ref, ref_type, false); |
| break; |
| case verifier::VERIFY_ERROR_ACCESS_CLASS: |
| exception_class = "Ljava/lang/IllegalAccessError;"; |
| msg = ClassNameFromIndex(method, ref, ref_type, true); |
| break; |
| case verifier::VERIFY_ERROR_ACCESS_FIELD: |
| exception_class = "Ljava/lang/IllegalAccessError;"; |
| msg = FieldNameFromIndex(method, ref, ref_type, true); |
| break; |
| case verifier::VERIFY_ERROR_ACCESS_METHOD: |
| exception_class = "Ljava/lang/IllegalAccessError;"; |
| msg = MethodNameFromIndex(method, ref, ref_type, true); |
| break; |
| case verifier::VERIFY_ERROR_CLASS_CHANGE: |
| exception_class = "Ljava/lang/IncompatibleClassChangeError;"; |
| msg = ClassNameFromIndex(method, ref, ref_type, false); |
| break; |
| case verifier::VERIFY_ERROR_INSTANTIATION: |
| exception_class = "Ljava/lang/InstantiationError;"; |
| msg = ClassNameFromIndex(method, ref, ref_type, false); |
| break; |
| case verifier::VERIFY_ERROR_BAD_CLASS_SOFT: |
| case verifier::VERIFY_ERROR_BAD_CLASS_HARD: |
| // Generic VerifyError; use default exception, no message. |
| break; |
| } |
| |
| self->ThrowNewException(exception_class, msg.c_str()); |
| } |
| |
| // 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); |
| } |
| } |
| |
| Field* FindFieldFromCode(uint32_t field_idx, const Method* referrer, Thread* self, |
| FindFieldType type, size_t expected_size) { |
| bool is_primitive; |
| bool is_set; |
| bool is_static; |
| switch (type) { |
| case InstanceObjectRead: is_primitive = false; is_set = false; is_static = false; break; |
| case InstanceObjectWrite: is_primitive = false; is_set = true; is_static = false; break; |
| case InstancePrimitiveRead: is_primitive = true; is_set = false; is_static = false; break; |
| case InstancePrimitiveWrite: is_primitive = true; is_set = true; is_static = false; break; |
| case StaticObjectRead: is_primitive = false; is_set = false; is_static = true; break; |
| case StaticObjectWrite: is_primitive = false; is_set = true; is_static = true; break; |
| case StaticPrimitiveRead: is_primitive = true; is_set = false; is_static = true; break; |
| case StaticPrimitiveWrite: // Keep GCC happy by having a default handler, fall-through. |
| default: is_primitive = true; is_set = true; is_static = true; break; |
| } |
| 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 { |
| if (resolved_field->IsStatic() != is_static) { |
| ThrowNewIncompatibleClassChangeErrorField(self, resolved_field, is_static); |
| return NULL; |
| } |
| Class* fields_class = resolved_field->GetDeclaringClass(); |
| Class* referring_class = referrer->GetDeclaringClass(); |
| if (UNLIKELY(!referring_class->CanAccess(fields_class) || |
| !referring_class->CanAccessMember(fields_class, |
| resolved_field->GetAccessFlags()))) { |
| // The referring class can't access the resolved field, this may occur as a result of a |
| // protected field being made public by a sub-class. Resort to the dex file to determine |
| // the correct class for the access check. |
| const DexFile& dex_file = class_linker->FindDexFile(referring_class->GetDexCache()); |
| fields_class = class_linker->ResolveType(dex_file, |
| dex_file.GetFieldId(field_idx).class_idx_, |
| referring_class); |
| 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 |
| } |
| } |
| 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, 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, type); |
| 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, |
| 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 { |
| // Incompatible class change should have been handled in resolve method. |
| if (UNLIKELY(resolved_method->CheckIncompatibleClassChange(type))) { |
| ThrowIncompatibleClassChangeError(type, resolved_method->GetInvokeType(), resolved_method); |
| return NULL; // Failure. |
| } |
| 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, |
| 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. |
| MethodHelper mh(resolved_method); |
| ThrowNoSuchMethodError(type, resolved_method->GetDeclaringClass(), mh.GetName(), |
| mh.GetSignature()); |
| return NULL; // Failure. |
| } |
| } |
| } |
| } |
| } |
| |
| Class* ResolveVerifyAndClinit(uint32_t type_idx, const Method* referrer, Thread* self, |
| bool can_run_clinit, bool verify_access) { |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| Class* klass = class_linker->ResolveType(type_idx, referrer); |
| if (UNLIKELY(klass == NULL)) { |
| CHECK(self->IsExceptionPending()); |
| return NULL; // Failure - Indicate to caller to deliver exception |
| } |
| // Perform access check if necessary. |
| Class* referring_class = referrer->GetDeclaringClass(); |
| if (verify_access && UNLIKELY(!referring_class->CanAccess(klass))) { |
| ThrowNewIllegalAccessErrorClass(self, referring_class, klass); |
| return NULL; // Failure - Indicate to caller to deliver exception |
| } |
| // If we're just implementing const-class, we shouldn't call <clinit>. |
| if (!can_run_clinit) { |
| return klass; |
| } |
| // If we are the <clinit> of this class, just return our storage. |
| // |
| // Do not set the DexCache InitializedStaticStorage, since that implies <clinit> has finished |
| // running. |
| if (klass == referring_class && MethodHelper(referrer).IsClassInitializer()) { |
| return klass; |
| } |
| if (!class_linker->EnsureInitialized(klass, true, true)) { |
| CHECK(self->IsExceptionPending()); |
| return NULL; // Failure - Indicate to caller to deliver exception |
| } |
| referrer->GetDexCacheInitializedStaticStorage()->Set(type_idx, klass); |
| return klass; |
| } |
| |
| } // namespace art |
