diff options
Diffstat (limited to 'runtime/object_utils.h')
| -rw-r--r-- | runtime/object_utils.h | 687 |
1 files changed, 687 insertions, 0 deletions
diff --git a/runtime/object_utils.h b/runtime/object_utils.h new file mode 100644 index 0000000..4af5d4c --- /dev/null +++ b/runtime/object_utils.h @@ -0,0 +1,687 @@ +/* + * Copyright (C) 2011 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. + */ + +#ifndef ART_SRC_OBJECT_UTILS_H_ +#define ART_SRC_OBJECT_UTILS_H_ + +#include "class_linker-inl.h" +#include "dex_file.h" +#include "monitor.h" +#include "mirror/abstract_method.h" +#include "mirror/class.h" +#include "mirror/dex_cache.h" +#include "mirror/field.h" +#include "mirror/iftable.h" +#include "mirror/string.h" + +#include "runtime.h" +#include "sirt_ref.h" + +#include <string> + +namespace art { + +class ObjectLock { + public: + explicit ObjectLock(Thread* self, mirror::Object* object) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) + : self_(self), obj_(object) { + CHECK(object != NULL); + obj_->MonitorEnter(self_); + } + + ~ObjectLock() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + obj_->MonitorExit(self_); + } + + void WaitIgnoringInterrupts() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + Monitor::Wait(self_, obj_, 0, 0, false, kWaiting); + } + + void Notify() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + obj_->Notify(self_); + } + + void NotifyAll() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + obj_->NotifyAll(self_); + } + + private: + Thread* const self_; + mirror::Object* obj_; + DISALLOW_COPY_AND_ASSIGN(ObjectLock); +}; + +class ClassHelper { + public: + ClassHelper(const mirror::Class* c = NULL, ClassLinker* l = NULL) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) + : class_def_(NULL), + class_linker_(l), + dex_cache_(NULL), + dex_file_(NULL), + interface_type_list_(NULL), + klass_(NULL) { + if (c != NULL) { + ChangeClass(c); + } + } + + void ChangeClass(const mirror::Class* new_c) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + CHECK(new_c != NULL) << "klass_=" << klass_; // Log what we were changing from if any + CHECK(new_c->IsClass()) << "new_c=" << new_c; + if (dex_cache_ != NULL) { + mirror::DexCache* new_c_dex_cache = new_c->GetDexCache(); + if (new_c_dex_cache != dex_cache_) { + dex_cache_ = new_c_dex_cache; + dex_file_ = NULL; + } + } + klass_ = new_c; + interface_type_list_ = NULL; + class_def_ = NULL; + } + + // The returned const char* is only guaranteed to be valid for the lifetime of the ClassHelper. + // If you need it longer, copy it into a std::string. + const char* GetDescriptor() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + CHECK(klass_ != NULL); + if (UNLIKELY(klass_->IsArrayClass())) { + return GetArrayDescriptor(); + } else if (UNLIKELY(klass_->IsPrimitive())) { + return Primitive::Descriptor(klass_->GetPrimitiveType()); + } else if (UNLIKELY(klass_->IsProxyClass())) { + descriptor_ = GetClassLinker()->GetDescriptorForProxy(klass_); + return descriptor_.c_str(); + } else { + const DexFile& dex_file = GetDexFile(); + const DexFile::TypeId& type_id = dex_file.GetTypeId(klass_->GetDexTypeIndex()); + return dex_file.GetTypeDescriptor(type_id); + } + } + + const char* GetArrayDescriptor() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + std::string result("["); + const mirror::Class* saved_klass = klass_; + CHECK(saved_klass != NULL); + ChangeClass(klass_->GetComponentType()); + result += GetDescriptor(); + ChangeClass(saved_klass); + descriptor_ = result; + return descriptor_.c_str(); + } + + const DexFile::ClassDef* GetClassDef() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile::ClassDef* result = class_def_; + if (result == NULL) { + result = GetDexFile().FindClassDef(GetDescriptor()); + class_def_ = result; + } + return result; + } + + uint32_t NumDirectInterfaces() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + DCHECK(klass_ != NULL); + if (klass_->IsPrimitive()) { + return 0; + } else if (klass_->IsArrayClass()) { + return 2; + } else if (klass_->IsProxyClass()) { + return klass_->GetIfTable()->GetLength(); + } else { + const DexFile::TypeList* interfaces = GetInterfaceTypeList(); + if (interfaces == NULL) { + return 0; + } else { + return interfaces->Size(); + } + } + } + + uint16_t GetDirectInterfaceTypeIdx(uint32_t idx) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + DCHECK(klass_ != NULL); + DCHECK(!klass_->IsPrimitive()); + DCHECK(!klass_->IsArrayClass()); + return GetInterfaceTypeList()->GetTypeItem(idx).type_idx_; + } + + mirror::Class* GetDirectInterface(uint32_t idx) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + DCHECK(klass_ != NULL); + DCHECK(!klass_->IsPrimitive()); + if (klass_->IsArrayClass()) { + if (idx == 0) { + return GetClassLinker()->FindSystemClass("Ljava/lang/Cloneable;"); + } else { + DCHECK_EQ(1U, idx); + return GetClassLinker()->FindSystemClass("Ljava/io/Serializable;"); + } + } else if (klass_->IsProxyClass()) { + return klass_->GetIfTable()->GetInterface(idx); + } else { + uint16_t type_idx = GetDirectInterfaceTypeIdx(idx); + mirror::Class* interface = GetDexCache()->GetResolvedType(type_idx); + if (interface == NULL) { + interface = GetClassLinker()->ResolveType(GetDexFile(), type_idx, klass_); + CHECK(interface != NULL || Thread::Current()->IsExceptionPending()); + } + return interface; + } + } + + const char* GetSourceFile() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + std::string descriptor(GetDescriptor()); + const DexFile& dex_file = GetDexFile(); + const DexFile::ClassDef* dex_class_def = dex_file.FindClassDef(descriptor); + CHECK(dex_class_def != NULL); + return dex_file.GetSourceFile(*dex_class_def); + } + + std::string GetLocation() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::DexCache* dex_cache = GetDexCache(); + if (dex_cache != NULL && !klass_->IsProxyClass()) { + return dex_cache->GetLocation()->ToModifiedUtf8(); + } else { + // Arrays and proxies are generated and have no corresponding dex file location. + return "generated class"; + } + } + + const DexFile& GetDexFile() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + if (dex_file_ == NULL) { + dex_file_ = GetDexCache()->GetDexFile(); + } + return *dex_file_; + } + + mirror::DexCache* GetDexCache() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::DexCache* result = dex_cache_; + if (result == NULL) { + DCHECK(klass_ != NULL); + result = klass_->GetDexCache(); + dex_cache_ = result; + } + return result; + } + + private: + const DexFile::TypeList* GetInterfaceTypeList() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile::TypeList* result = interface_type_list_; + if (result == NULL) { + const DexFile::ClassDef* class_def = GetClassDef(); + if (class_def != NULL) { + result = GetDexFile().GetInterfacesList(*class_def); + interface_type_list_ = result; + } + } + return result; + } + + ClassLinker* GetClassLinker() { + ClassLinker* result = class_linker_; + if (result == NULL) { + result = Runtime::Current()->GetClassLinker(); + class_linker_ = result; + } + return result; + } + + const DexFile::ClassDef* class_def_; + ClassLinker* class_linker_; + mirror::DexCache* dex_cache_; + const DexFile* dex_file_; + const DexFile::TypeList* interface_type_list_; + const mirror::Class* klass_; + std::string descriptor_; + + DISALLOW_COPY_AND_ASSIGN(ClassHelper); +}; + +class FieldHelper { + public: + FieldHelper() : class_linker_(NULL), dex_cache_(NULL), dex_file_(NULL), field_(NULL) {} + explicit FieldHelper(const mirror::Field* f) : class_linker_(NULL), dex_cache_(NULL), dex_file_(NULL), field_(f) {} + FieldHelper(const mirror::Field* f, ClassLinker* l) + : class_linker_(l), dex_cache_(NULL), dex_file_(NULL), field_(f) {} + + void ChangeField(const mirror::Field* new_f) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + DCHECK(new_f != NULL); + if (dex_cache_ != NULL) { + mirror::DexCache* new_f_dex_cache = new_f->GetDeclaringClass()->GetDexCache(); + if (new_f_dex_cache != dex_cache_) { + dex_cache_ = new_f_dex_cache; + dex_file_ = NULL; + } + } + field_ = new_f; + } + const char* GetName() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + uint32_t field_index = field_->GetDexFieldIndex(); + if (!field_->GetDeclaringClass()->IsProxyClass()) { + const DexFile& dex_file = GetDexFile(); + return dex_file.GetFieldName(dex_file.GetFieldId(field_index)); + } else { + DCHECK(field_->IsStatic()); + DCHECK_LT(field_index, 2U); + return field_index == 0 ? "interfaces" : "throws"; + } + } + mirror::Class* GetType(bool resolve = true) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + uint32_t field_index = field_->GetDexFieldIndex(); + if (!field_->GetDeclaringClass()->IsProxyClass()) { + const DexFile& dex_file = GetDexFile(); + const DexFile::FieldId& field_id = dex_file.GetFieldId(field_index); + mirror::Class* type = GetDexCache()->GetResolvedType(field_id.type_idx_); + if (resolve && (type == NULL)) { + type = GetClassLinker()->ResolveType(field_id.type_idx_, field_); + CHECK(type != NULL || Thread::Current()->IsExceptionPending()); + } + return type; + } else { + return GetClassLinker()->FindSystemClass(GetTypeDescriptor()); + } + } + const char* GetTypeDescriptor() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + uint32_t field_index = field_->GetDexFieldIndex(); + if (!field_->GetDeclaringClass()->IsProxyClass()) { + const DexFile& dex_file = GetDexFile(); + const DexFile::FieldId& field_id = dex_file.GetFieldId(field_index); + return dex_file.GetFieldTypeDescriptor(field_id); + } else { + DCHECK(field_->IsStatic()); + DCHECK_LT(field_index, 2U); + // 0 == Class[] interfaces; 1 == Class[][] throws; + return field_index == 0 ? "[Ljava/lang/Class;" : "[[Ljava/lang/Class;"; + } + } + Primitive::Type GetTypeAsPrimitiveType() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return Primitive::GetType(GetTypeDescriptor()[0]); + } + bool IsPrimitiveType() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + Primitive::Type type = GetTypeAsPrimitiveType(); + return type != Primitive::kPrimNot; + } + size_t FieldSize() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + Primitive::Type type = GetTypeAsPrimitiveType(); + return Primitive::FieldSize(type); + } + + // The returned const char* is only guaranteed to be valid for the lifetime of the FieldHelper. + // If you need it longer, copy it into a std::string. + const char* GetDeclaringClassDescriptor() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + uint16_t type_idx = field_->GetDeclaringClass()->GetDexTypeIndex(); + if (type_idx != DexFile::kDexNoIndex16) { + const DexFile& dex_file = GetDexFile(); + return dex_file.GetTypeDescriptor(dex_file.GetTypeId(type_idx)); + } else { + // Most likely a proxy class. + ClassHelper kh(field_->GetDeclaringClass()); + declaring_class_descriptor_ = kh.GetDescriptor(); + return declaring_class_descriptor_.c_str(); + } + } + + private: + mirror::DexCache* GetDexCache() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::DexCache* result = dex_cache_; + if (result == NULL) { + result = field_->GetDeclaringClass()->GetDexCache(); + dex_cache_ = result; + } + return result; + } + ClassLinker* GetClassLinker() { + ClassLinker* result = class_linker_; + if (result == NULL) { + result = Runtime::Current()->GetClassLinker(); + class_linker_ = result; + } + return result; + } + const DexFile& GetDexFile() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + if (dex_file_ == NULL) { + dex_file_ = GetDexCache()->GetDexFile(); + } + return *dex_file_; + } + + ClassLinker* class_linker_; + mirror::DexCache* dex_cache_; + const DexFile* dex_file_; + const mirror::Field* field_; + std::string declaring_class_descriptor_; + + DISALLOW_COPY_AND_ASSIGN(FieldHelper); +}; + +class MethodHelper { + public: + MethodHelper() + : class_linker_(NULL), dex_cache_(NULL), dex_file_(NULL), method_(NULL), shorty_(NULL), + shorty_len_(0) {} + + explicit MethodHelper(const mirror::AbstractMethod* m) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) + : class_linker_(NULL), dex_cache_(NULL), dex_file_(NULL), method_(NULL), shorty_(NULL), + shorty_len_(0) { + SetMethod(m); + } + + MethodHelper(const mirror::AbstractMethod* m, ClassLinker* l) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) + : class_linker_(l), dex_cache_(NULL), dex_file_(NULL), method_(NULL), shorty_(NULL), + shorty_len_(0) { + SetMethod(m); + } + + void ChangeMethod(mirror::AbstractMethod* new_m) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + DCHECK(new_m != NULL); + if (dex_cache_ != NULL) { + mirror::Class* klass = new_m->GetDeclaringClass(); + if (klass->IsProxyClass()) { + dex_cache_ = NULL; + dex_file_ = NULL; + } else { + mirror::DexCache* new_m_dex_cache = klass->GetDexCache(); + if (new_m_dex_cache != dex_cache_) { + dex_cache_ = new_m_dex_cache; + dex_file_ = NULL; + } + } + } + SetMethod(new_m); + shorty_ = NULL; + } + + const char* GetName() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile& dex_file = GetDexFile(); + uint32_t dex_method_idx = method_->GetDexMethodIndex(); + if (dex_method_idx != DexFile::kDexNoIndex16) { + return dex_file.GetMethodName(dex_file.GetMethodId(dex_method_idx)); + } else { + Runtime* runtime = Runtime::Current(); + if (method_ == runtime->GetResolutionMethod()) { + return "<runtime internal resolution method>"; + } else if (method_ == runtime->GetCalleeSaveMethod(Runtime::kSaveAll)) { + return "<runtime internal callee-save all registers method>"; + } else if (method_ == runtime->GetCalleeSaveMethod(Runtime::kRefsOnly)) { + return "<runtime internal callee-save reference registers method>"; + } else if (method_ == runtime->GetCalleeSaveMethod(Runtime::kRefsAndArgs)) { + return "<runtime internal callee-save reference and argument registers method>"; + } else { + return "<unknown runtime internal method>"; + } + } + } + + mirror::String* GetNameAsString() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile& dex_file = GetDexFile(); + uint32_t dex_method_idx = method_->GetDexMethodIndex(); + const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx); + return GetClassLinker()->ResolveString(dex_file, method_id.name_idx_, GetDexCache()); + } + + const char* GetShorty() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const char* result = shorty_; + if (result == NULL) { + const DexFile& dex_file = GetDexFile(); + result = dex_file.GetMethodShorty(dex_file.GetMethodId(method_->GetDexMethodIndex()), + &shorty_len_); + shorty_ = result; + } + return result; + } + + uint32_t GetShortyLength() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + if (shorty_ == NULL) { + GetShorty(); + } + return shorty_len_; + } + + const std::string GetSignature() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile& dex_file = GetDexFile(); + uint32_t dex_method_idx = method_->GetDexMethodIndex(); + if (dex_method_idx != DexFile::kDexNoIndex16) { + return dex_file.GetMethodSignature(dex_file.GetMethodId(dex_method_idx)); + } else { + return "<no signature>"; + } + } + + const DexFile::ProtoId& GetPrototype() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile& dex_file = GetDexFile(); + return dex_file.GetMethodPrototype(dex_file.GetMethodId(method_->GetDexMethodIndex())); + } + + const DexFile::TypeList* GetParameterTypeList() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile::ProtoId& proto = GetPrototype(); + return GetDexFile().GetProtoParameters(proto); + } + + mirror::Class* GetReturnType() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile& dex_file = GetDexFile(); + const DexFile::MethodId& method_id = dex_file.GetMethodId(method_->GetDexMethodIndex()); + const DexFile::ProtoId& proto_id = dex_file.GetMethodPrototype(method_id); + uint16_t return_type_idx = proto_id.return_type_idx_; + return GetClassFromTypeIdx(return_type_idx); + } + + const char* GetReturnTypeDescriptor() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile& dex_file = GetDexFile(); + const DexFile::MethodId& method_id = dex_file.GetMethodId(method_->GetDexMethodIndex()); + const DexFile::ProtoId& proto_id = dex_file.GetMethodPrototype(method_id); + uint16_t return_type_idx = proto_id.return_type_idx_; + return dex_file.GetTypeDescriptor(dex_file.GetTypeId(return_type_idx)); + } + + int32_t GetLineNumFromDexPC(uint32_t dex_pc) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + if (dex_pc == DexFile::kDexNoIndex) { + return method_->IsNative() ? -2 : -1; + } else { + const DexFile& dex_file = GetDexFile(); + return dex_file.GetLineNumFromPC(method_, dex_pc); + } + } + + const char* GetDeclaringClassDescriptor() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::Class* klass = method_->GetDeclaringClass(); + DCHECK(!klass->IsProxyClass()); + uint16_t type_idx = klass->GetDexTypeIndex(); + const DexFile& dex_file = GetDexFile(); + return dex_file.GetTypeDescriptor(dex_file.GetTypeId(type_idx)); + } + + const char* GetDeclaringClassSourceFile() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const char* descriptor = GetDeclaringClassDescriptor(); + const DexFile& dex_file = GetDexFile(); + const DexFile::ClassDef* dex_class_def = dex_file.FindClassDef(descriptor); + CHECK(dex_class_def != NULL); + return dex_file.GetSourceFile(*dex_class_def); + } + + uint32_t GetClassDefIndex() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const char* descriptor = GetDeclaringClassDescriptor(); + const DexFile& dex_file = GetDexFile(); + uint32_t index; + CHECK(dex_file.FindClassDefIndex(descriptor, index)); + return index; + } + + mirror::ClassLoader* GetClassLoader() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return method_->GetDeclaringClass()->GetClassLoader(); + } + + bool IsStatic() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return method_->IsStatic(); + } + + bool IsClassInitializer() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return IsStatic() && StringPiece(GetName()) == "<clinit>"; + } + + size_t NumArgs() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + // "1 +" because the first in Args is the receiver. + // "- 1" because we don't count the return type. + return (IsStatic() ? 0 : 1) + GetShortyLength() - 1; + } + + // Get the primitive type associated with the given parameter. + Primitive::Type GetParamPrimitiveType(size_t param) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + CHECK_LT(param, NumArgs()); + if (IsStatic()) { + param++; // 0th argument must skip return value at start of the shorty + } else if (param == 0) { + return Primitive::kPrimNot; + } + return Primitive::GetType(GetShorty()[param]); + } + + // Is the specified parameter a long or double, where parameter 0 is 'this' for instance methods. + bool IsParamALongOrDouble(size_t param) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + Primitive::Type type = GetParamPrimitiveType(param); + return type == Primitive::kPrimLong || type == Primitive::kPrimDouble; + } + + // Is the specified parameter a reference, where parameter 0 is 'this' for instance methods. + bool IsParamAReference(size_t param) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return GetParamPrimitiveType(param) == Primitive::kPrimNot; + } + + bool HasSameNameAndSignature(MethodHelper* other) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + if (GetDexCache() == other->GetDexCache()) { + const DexFile& dex_file = GetDexFile(); + const DexFile::MethodId& mid = dex_file.GetMethodId(method_->GetDexMethodIndex()); + const DexFile::MethodId& other_mid = + dex_file.GetMethodId(other->method_->GetDexMethodIndex()); + return mid.name_idx_ == other_mid.name_idx_ && mid.proto_idx_ == other_mid.proto_idx_; + } + StringPiece name(GetName()); + StringPiece other_name(other->GetName()); + return name == other_name && GetSignature() == other->GetSignature(); + } + + const DexFile::CodeItem* GetCodeItem() + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return GetDexFile().GetCodeItem(method_->GetCodeItemOffset()); + } + + bool IsResolvedTypeIdx(uint16_t type_idx) const + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return method_->GetDexCacheResolvedTypes()->Get(type_idx) != NULL; + } + + mirror::Class* GetClassFromTypeIdx(uint16_t type_idx) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::Class* type = method_->GetDexCacheResolvedTypes()->Get(type_idx); + if (type == NULL) { + type = GetClassLinker()->ResolveType(type_idx, method_); + CHECK(type != NULL || Thread::Current()->IsExceptionPending()); + } + return type; + } + + const char* GetTypeDescriptorFromTypeIdx(uint16_t type_idx) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile& dex_file = GetDexFile(); + return dex_file.GetTypeDescriptor(dex_file.GetTypeId(type_idx)); + } + + mirror::Class* GetDexCacheResolvedType(uint16_t type_idx) + SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + return method_->GetDexCacheResolvedTypes()->Get(type_idx); + } + + const DexFile& GetDexFile() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + const DexFile* result = dex_file_; + if (result == NULL) { + const mirror::DexCache* dex_cache = GetDexCache(); + result = dex_file_ = dex_cache->GetDexFile(); + } + return *result; + } + + mirror::DexCache* GetDexCache() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::DexCache* result = dex_cache_; + if (result == NULL) { + mirror::Class* klass = method_->GetDeclaringClass(); + result = klass->GetDexCache(); + dex_cache_ = result; + } + return result; + } + + mirror::String* ResolveString(uint32_t string_idx) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + mirror::String* s = method_->GetDexCacheStrings()->Get(string_idx); + if (UNLIKELY(s == NULL)) { + s = GetClassLinker()->ResolveString(GetDexFile(), string_idx, GetDexCache()); + } + return s; + } + + private: + // Set the method_ field, for proxy methods looking up the interface method via the resolved + // methods table. + void SetMethod(const mirror::AbstractMethod* method) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { + if (method != NULL) { + mirror::Class* klass = method->GetDeclaringClass(); + if (UNLIKELY(klass->IsProxyClass())) { + mirror::AbstractMethod* interface_method = + method->GetDexCacheResolvedMethods()->Get(method->GetDexMethodIndex()); + DCHECK(interface_method != NULL); + DCHECK(interface_method == GetClassLinker()->FindMethodForProxy(klass, method)); + method = interface_method; + } + } + method_ = method; + } + + ClassLinker* GetClassLinker() { + ClassLinker* result = class_linker_; + if (result == NULL) { + result = Runtime::Current()->GetClassLinker(); + class_linker_ = result; + } + return result; + } + + ClassLinker* class_linker_; + mirror::DexCache* dex_cache_; + const DexFile* dex_file_; + const mirror::AbstractMethod* method_; + const char* shorty_; + uint32_t shorty_len_; + + DISALLOW_COPY_AND_ASSIGN(MethodHelper); +}; + +} // namespace art + +#endif // ART_SRC_OBJECT_UTILS_H_ |