1 /* 2 * Copyright (C) 2016 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 #ifndef ART_RUNTIME_MIRROR_METHOD_TYPE_H_ 18 #define ART_RUNTIME_MIRROR_METHOD_TYPE_H_ 19 20 #include "object_array.h" 21 #include "object.h" 22 #include "string.h" 23 24 namespace art { 25 26 struct MethodTypeOffsets; 27 28 namespace mirror { 29 30 // C++ mirror of java.lang.invoke.MethodType 31 class MANAGED MethodType : public Object { 32 public: 33 static ObjPtr<MethodType> Create(Thread* const self, 34 Handle<Class> return_type, 35 Handle<ObjectArray<Class>> param_types) 36 REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_); 37 38 static ObjPtr<MethodType> CloneWithoutLeadingParameter(Thread* const self, 39 ObjPtr<MethodType> method_type) 40 REQUIRES_SHARED(Locks::mutator_lock_); 41 42 // Collects trailing parameter types into an array. Assumes caller 43 // has checked trailing arguments are all of the same type. 44 static ObjPtr<MethodType> CollectTrailingArguments(Thread* const self, 45 ObjPtr<MethodType> method_type, 46 ObjPtr<Class> collector_array_class, 47 int32_t start_index) 48 REQUIRES_SHARED(Locks::mutator_lock_); 49 50 ObjPtr<ObjectArray<Class>> GetPTypes() REQUIRES_SHARED(Locks::mutator_lock_); 51 52 int GetNumberOfPTypes() REQUIRES_SHARED(Locks::mutator_lock_); 53 54 // Number of virtual registers required to hold the parameters for 55 // this method type. 56 size_t NumberOfVRegs() REQUIRES_SHARED(Locks::mutator_lock_); 57 58 ObjPtr<Class> GetRType() REQUIRES_SHARED(Locks::mutator_lock_); 59 60 // Returns true iff. |this| is an exact match for method type |target|, i.e 61 // iff. they have the same return types and parameter types. 62 bool IsExactMatch(ObjPtr<MethodType> target) REQUIRES_SHARED(Locks::mutator_lock_); 63 64 // Returns true iff. |this| can be converted to match |target| method type, i.e 65 // iff. they have convertible return types and parameter types. 66 bool IsConvertible(ObjPtr<MethodType> target) REQUIRES_SHARED(Locks::mutator_lock_); 67 68 // Returns the pretty descriptor for this method type, suitable for display in 69 // exception messages and the like. 70 std::string PrettyDescriptor() REQUIRES_SHARED(Locks::mutator_lock_); 71 72 private: FormOffset()73 static MemberOffset FormOffset() { 74 return MemberOffset(OFFSETOF_MEMBER(MethodType, form_)); 75 } 76 MethodDescriptorOffset()77 static MemberOffset MethodDescriptorOffset() { 78 return MemberOffset(OFFSETOF_MEMBER(MethodType, method_descriptor_)); 79 } 80 PTypesOffset()81 static MemberOffset PTypesOffset() { 82 return MemberOffset(OFFSETOF_MEMBER(MethodType, p_types_)); 83 } 84 RTypeOffset()85 static MemberOffset RTypeOffset() { 86 return MemberOffset(OFFSETOF_MEMBER(MethodType, r_type_)); 87 } 88 WrapAltOffset()89 static MemberOffset WrapAltOffset() { 90 return MemberOffset(OFFSETOF_MEMBER(MethodType, wrap_alt_)); 91 } 92 93 HeapReference<Object> form_; // Unused in the runtime 94 HeapReference<String> method_descriptor_; // Unused in the runtime 95 HeapReference<ObjectArray<Class>> p_types_; 96 HeapReference<Class> r_type_; 97 HeapReference<Object> wrap_alt_; // Unused in the runtime 98 99 friend struct art::MethodTypeOffsets; // for verifying offset information 100 DISALLOW_IMPLICIT_CONSTRUCTORS(MethodType); 101 }; 102 103 } // namespace mirror 104 } // namespace art 105 106 #endif // ART_RUNTIME_MIRROR_METHOD_TYPE_H_ 107