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.h" 21 #include "string.h" 22 #include "mirror/object_array.h" 23 #include "utils.h" 24 25 namespace art { 26 27 struct MethodTypeOffsets; 28 29 namespace mirror { 30 31 // C++ mirror of java.lang.invoke.MethodType 32 class MANAGED MethodType : public Object { 33 public: 34 static mirror::MethodType* Create(Thread* const self, 35 Handle<Class> return_type, 36 Handle<ObjectArray<Class>> param_types) 37 REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_); 38 StaticClass()39 static mirror::Class* StaticClass() REQUIRES_SHARED(Locks::mutator_lock_) { 40 return static_class_.Read(); 41 } 42 GetPTypes()43 ObjectArray<Class>* GetPTypes() REQUIRES_SHARED(Locks::mutator_lock_) { 44 return GetFieldObject<ObjectArray<Class>>(OFFSET_OF_OBJECT_MEMBER(MethodType, p_types_)); 45 } 46 47 // Number of virtual registers required to hold the parameters for 48 // this method type. 49 size_t NumberOfVRegs() REQUIRES_SHARED(Locks::mutator_lock_); 50 GetRType()51 Class* GetRType() REQUIRES_SHARED(Locks::mutator_lock_) { 52 return GetFieldObject<Class>(OFFSET_OF_OBJECT_MEMBER(MethodType, r_type_)); 53 } 54 55 static void SetClass(Class* klass) REQUIRES_SHARED(Locks::mutator_lock_); 56 static void ResetClass() REQUIRES_SHARED(Locks::mutator_lock_); 57 static void VisitRoots(RootVisitor* visitor) REQUIRES_SHARED(Locks::mutator_lock_); 58 59 // Returns true iff. |this| is an exact match for method type |target|, i.e 60 // iff. they have the same return types and parameter types. 61 bool IsExactMatch(mirror::MethodType* target) REQUIRES_SHARED(Locks::mutator_lock_); 62 63 // Returns true iff. |this| can be converted to match |target| method type, i.e 64 // iff. they have convertible return types and parameter types. 65 bool IsConvertible(mirror::MethodType* target) REQUIRES_SHARED(Locks::mutator_lock_); 66 67 // Returns the pretty descriptor for this method type, suitable for display in 68 // exception messages and the like. 69 std::string PrettyDescriptor() REQUIRES_SHARED(Locks::mutator_lock_); 70 71 private: FormOffset()72 static MemberOffset FormOffset() { 73 return MemberOffset(OFFSETOF_MEMBER(MethodType, form_)); 74 } 75 MethodDescriptorOffset()76 static MemberOffset MethodDescriptorOffset() { 77 return MemberOffset(OFFSETOF_MEMBER(MethodType, method_descriptor_)); 78 } 79 PTypesOffset()80 static MemberOffset PTypesOffset() { 81 return MemberOffset(OFFSETOF_MEMBER(MethodType, p_types_)); 82 } 83 RTypeOffset()84 static MemberOffset RTypeOffset() { 85 return MemberOffset(OFFSETOF_MEMBER(MethodType, r_type_)); 86 } 87 WrapAltOffset()88 static MemberOffset WrapAltOffset() { 89 return MemberOffset(OFFSETOF_MEMBER(MethodType, wrap_alt_)); 90 } 91 92 HeapReference<mirror::Object> form_; // Unused in the runtime 93 HeapReference<mirror::String> method_descriptor_; // Unused in the runtime 94 HeapReference<ObjectArray<mirror::Class>> p_types_; 95 HeapReference<mirror::Class> r_type_; 96 HeapReference<mirror::Object> wrap_alt_; // Unused in the runtime 97 98 static GcRoot<mirror::Class> static_class_; // java.lang.invoke.MethodType.class 99 100 friend struct art::MethodTypeOffsets; // for verifying offset information 101 DISALLOW_IMPLICIT_CONSTRUCTORS(MethodType); 102 }; 103 104 } // namespace mirror 105 } // namespace art 106 107 #endif // ART_RUNTIME_MIRROR_METHOD_TYPE_H_ 108