| /* |
| * Copyright (C) 2016 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 "method_type.h" |
| |
| #include "class-inl.h" |
| #include "gc_root-inl.h" |
| #include "method_handles.h" |
| |
| namespace art { |
| namespace mirror { |
| |
| GcRoot<mirror::Class> MethodType::static_class_; |
| |
| mirror::MethodType* MethodType::Create(Thread* const self, |
| Handle<Class> return_type, |
| Handle<ObjectArray<Class>> param_types) { |
| StackHandleScope<1> hs(self); |
| Handle<mirror::MethodType> mt( |
| hs.NewHandle(ObjPtr<MethodType>::DownCast(StaticClass()->AllocObject(self)))); |
| |
| // TODO: Do we ever create a MethodType during a transaction ? There doesn't |
| // seem like a good reason to do a polymorphic invoke that results in the |
| // resolution of a method type in an unstarted runtime. |
| mt->SetFieldObject<false>(FormOffset(), nullptr); |
| mt->SetFieldObject<false>(MethodDescriptorOffset(), nullptr); |
| mt->SetFieldObject<false>(RTypeOffset(), return_type.Get()); |
| mt->SetFieldObject<false>(PTypesOffset(), param_types.Get()); |
| mt->SetFieldObject<false>(WrapAltOffset(), nullptr); |
| |
| return mt.Get(); |
| } |
| |
| size_t MethodType::NumberOfVRegs() REQUIRES_SHARED(Locks::mutator_lock_) { |
| mirror::ObjectArray<Class>* const p_types = GetPTypes(); |
| const int32_t p_types_length = p_types->GetLength(); |
| |
| // Initialize |num_vregs| with number of parameters and only increment it for |
| // types requiring a second vreg. |
| size_t num_vregs = static_cast<size_t>(p_types_length); |
| for (int32_t i = 0; i < p_types_length; ++i) { |
| mirror::Class* klass = p_types->GetWithoutChecks(i); |
| if (klass->IsPrimitiveLong() || klass->IsPrimitiveDouble()) { |
| ++num_vregs; |
| } |
| } |
| return num_vregs; |
| } |
| |
| bool MethodType::IsExactMatch(mirror::MethodType* target) REQUIRES_SHARED(Locks::mutator_lock_) { |
| mirror::ObjectArray<Class>* const p_types = GetPTypes(); |
| const int32_t params_length = p_types->GetLength(); |
| |
| mirror::ObjectArray<Class>* const target_p_types = target->GetPTypes(); |
| if (params_length != target_p_types->GetLength()) { |
| return false; |
| } |
| for (int32_t i = 0; i < params_length; ++i) { |
| if (p_types->GetWithoutChecks(i) != target_p_types->GetWithoutChecks(i)) { |
| return false; |
| } |
| } |
| return GetRType() == target->GetRType(); |
| } |
| |
| bool MethodType::IsConvertible(mirror::MethodType* target) REQUIRES_SHARED(Locks::mutator_lock_) { |
| mirror::ObjectArray<Class>* const p_types = GetPTypes(); |
| const int32_t params_length = p_types->GetLength(); |
| |
| mirror::ObjectArray<Class>* const target_p_types = target->GetPTypes(); |
| if (params_length != target_p_types->GetLength()) { |
| return false; |
| } |
| |
| // Perform return check before invoking method handle otherwise side |
| // effects from the invocation may be observable before |
| // WrongMethodTypeException is raised. |
| if (!IsReturnTypeConvertible(target->GetRType(), GetRType())) { |
| return false; |
| } |
| |
| for (int32_t i = 0; i < params_length; ++i) { |
| if (!IsParameterTypeConvertible(p_types->GetWithoutChecks(i), |
| target_p_types->GetWithoutChecks(i))) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| std::string MethodType::PrettyDescriptor() REQUIRES_SHARED(Locks::mutator_lock_) { |
| std::ostringstream ss; |
| ss << "("; |
| |
| mirror::ObjectArray<Class>* const p_types = GetPTypes(); |
| const int32_t params_length = p_types->GetLength(); |
| for (int32_t i = 0; i < params_length; ++i) { |
| ss << p_types->GetWithoutChecks(i)->PrettyDescriptor(); |
| if (i != (params_length - 1)) { |
| ss << ", "; |
| } |
| } |
| |
| ss << ")"; |
| ss << GetRType()->PrettyDescriptor(); |
| |
| return ss.str(); |
| } |
| |
| void MethodType::SetClass(Class* klass) { |
| CHECK(static_class_.IsNull()) << static_class_.Read() << " " << klass; |
| CHECK(klass != nullptr); |
| static_class_ = GcRoot<Class>(klass); |
| } |
| |
| void MethodType::ResetClass() { |
| CHECK(!static_class_.IsNull()); |
| static_class_ = GcRoot<Class>(nullptr); |
| } |
| |
| void MethodType::VisitRoots(RootVisitor* visitor) { |
| static_class_.VisitRootIfNonNull(visitor, RootInfo(kRootStickyClass)); |
| } |
| |
| } // namespace mirror |
| } // namespace art |