| /* |
| * 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. |
| */ |
| |
| #ifndef ART_COMPILER_DRIVER_COMPILER_DRIVER_INL_H_ |
| #define ART_COMPILER_DRIVER_COMPILER_DRIVER_INL_H_ |
| |
| #include "compiler_driver.h" |
| |
| #include "art_field-inl.h" |
| #include "art_method-inl.h" |
| #include "base/enums.h" |
| #include "class_linker-inl.h" |
| #include "dex_compilation_unit.h" |
| #include "mirror/class_loader.h" |
| #include "mirror/dex_cache-inl.h" |
| #include "scoped_thread_state_change-inl.h" |
| #include "handle_scope-inl.h" |
| |
| namespace art { |
| |
| inline mirror::Class* CompilerDriver::ResolveClass( |
| const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, dex::TypeIndex cls_index, |
| const DexCompilationUnit* mUnit) { |
| DCHECK_EQ(dex_cache->GetDexFile(), mUnit->GetDexFile()); |
| DCHECK_EQ(class_loader.Get(), mUnit->GetClassLoader().Get()); |
| mirror::Class* cls = mUnit->GetClassLinker()->ResolveType( |
| *mUnit->GetDexFile(), cls_index, dex_cache, class_loader); |
| DCHECK_EQ(cls == nullptr, soa.Self()->IsExceptionPending()); |
| if (UNLIKELY(cls == nullptr)) { |
| // Clean up any exception left by type resolution. |
| soa.Self()->ClearException(); |
| } |
| return cls; |
| } |
| |
| inline mirror::Class* CompilerDriver::ResolveCompilingMethodsClass( |
| const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit) { |
| DCHECK_EQ(dex_cache->GetDexFile(), mUnit->GetDexFile()); |
| DCHECK_EQ(class_loader.Get(), mUnit->GetClassLoader().Get()); |
| const DexFile::MethodId& referrer_method_id = |
| mUnit->GetDexFile()->GetMethodId(mUnit->GetDexMethodIndex()); |
| return ResolveClass(soa, dex_cache, class_loader, referrer_method_id.class_idx_, mUnit); |
| } |
| |
| inline ArtField* CompilerDriver::ResolveFieldWithDexFile( |
| const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, const DexFile* dex_file, |
| uint32_t field_idx, bool is_static) { |
| DCHECK_EQ(dex_cache->GetDexFile(), dex_file); |
| ArtField* resolved_field = Runtime::Current()->GetClassLinker()->ResolveField( |
| *dex_file, field_idx, dex_cache, class_loader, is_static); |
| DCHECK_EQ(resolved_field == nullptr, soa.Self()->IsExceptionPending()); |
| if (UNLIKELY(resolved_field == nullptr)) { |
| // Clean up any exception left by type resolution. |
| soa.Self()->ClearException(); |
| return nullptr; |
| } |
| if (UNLIKELY(resolved_field->IsStatic() != is_static)) { |
| // ClassLinker can return a field of the wrong kind directly from the DexCache. |
| // Silently return null on such incompatible class change. |
| return nullptr; |
| } |
| return resolved_field; |
| } |
| |
| inline ArtField* CompilerDriver::ResolveField( |
| const ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit, |
| uint32_t field_idx, bool is_static) { |
| DCHECK_EQ(class_loader.Get(), mUnit->GetClassLoader().Get()); |
| return ResolveFieldWithDexFile(soa, dex_cache, class_loader, mUnit->GetDexFile(), field_idx, |
| is_static); |
| } |
| |
| inline std::pair<bool, bool> CompilerDriver::IsFastInstanceField( |
| mirror::DexCache* dex_cache, mirror::Class* referrer_class, |
| ArtField* resolved_field, uint16_t field_idx) { |
| DCHECK(!resolved_field->IsStatic()); |
| ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass(); |
| bool fast_get = referrer_class != nullptr && |
| referrer_class->CanAccessResolvedField(fields_class, |
| resolved_field, |
| dex_cache, |
| field_idx); |
| bool fast_put = fast_get && (!resolved_field->IsFinal() || fields_class == referrer_class); |
| return std::make_pair(fast_get, fast_put); |
| } |
| |
| template <typename ArtMember> |
| inline bool CompilerDriver::CanAccessResolvedMember(mirror::Class* referrer_class ATTRIBUTE_UNUSED, |
| mirror::Class* access_to ATTRIBUTE_UNUSED, |
| ArtMember* member ATTRIBUTE_UNUSED, |
| mirror::DexCache* dex_cache ATTRIBUTE_UNUSED, |
| uint32_t field_idx ATTRIBUTE_UNUSED) { |
| // Not defined for ArtMember values other than ArtField or ArtMethod. |
| UNREACHABLE(); |
| } |
| |
| template <> |
| inline bool CompilerDriver::CanAccessResolvedMember<ArtField>(mirror::Class* referrer_class, |
| mirror::Class* access_to, |
| ArtField* field, |
| mirror::DexCache* dex_cache, |
| uint32_t field_idx) { |
| return referrer_class->CanAccessResolvedField(access_to, field, dex_cache, field_idx); |
| } |
| |
| template <> |
| inline bool CompilerDriver::CanAccessResolvedMember<ArtMethod>( |
| mirror::Class* referrer_class, |
| mirror::Class* access_to, |
| ArtMethod* method, |
| mirror::DexCache* dex_cache, |
| uint32_t field_idx) { |
| return referrer_class->CanAccessResolvedMethod(access_to, method, dex_cache, field_idx); |
| } |
| |
| template <typename ArtMember> |
| inline std::pair<bool, bool> CompilerDriver::IsClassOfStaticMemberAvailableToReferrer( |
| mirror::DexCache* dex_cache, |
| mirror::Class* referrer_class, |
| ArtMember* resolved_member, |
| uint16_t member_idx, |
| dex::TypeIndex* storage_index) { |
| DCHECK(resolved_member->IsStatic()); |
| if (LIKELY(referrer_class != nullptr)) { |
| ObjPtr<mirror::Class> members_class = resolved_member->GetDeclaringClass(); |
| if (members_class == referrer_class) { |
| *storage_index = members_class->GetDexTypeIndex(); |
| return std::make_pair(true, true); |
| } |
| if (CanAccessResolvedMember<ArtMember>( |
| referrer_class, members_class.Ptr(), resolved_member, dex_cache, member_idx)) { |
| // We have the resolved member, we must make it into a index for the referrer |
| // in its static storage (which may fail if it doesn't have a slot for it) |
| // TODO: for images we can elide the static storage base null check |
| // if we know there's a non-null entry in the image |
| const DexFile* dex_file = dex_cache->GetDexFile(); |
| dex::TypeIndex storage_idx(DexFile::kDexNoIndex16); |
| if (LIKELY(members_class->GetDexCache() == dex_cache)) { |
| // common case where the dex cache of both the referrer and the member are the same, |
| // no need to search the dex file |
| storage_idx = members_class->GetDexTypeIndex(); |
| } else { |
| // Search dex file for localized ssb index, may fail if member's class is a parent |
| // of the class mentioned in the dex file and there is no dex cache entry. |
| storage_idx = resolved_member->GetDeclaringClass()->FindTypeIndexInOtherDexFile(*dex_file); |
| } |
| if (storage_idx.IsValid()) { |
| *storage_index = storage_idx; |
| return std::make_pair(true, !resolved_member->IsFinal()); |
| } |
| } |
| } |
| // Conservative defaults. |
| *storage_index = dex::TypeIndex(DexFile::kDexNoIndex16); |
| return std::make_pair(false, false); |
| } |
| |
| inline std::pair<bool, bool> CompilerDriver::IsFastStaticField( |
| mirror::DexCache* dex_cache, mirror::Class* referrer_class, |
| ArtField* resolved_field, uint16_t field_idx, dex::TypeIndex* storage_index) { |
| return IsClassOfStaticMemberAvailableToReferrer( |
| dex_cache, referrer_class, resolved_field, field_idx, storage_index); |
| } |
| |
| inline bool CompilerDriver::IsClassOfStaticMethodAvailableToReferrer( |
| mirror::DexCache* dex_cache, mirror::Class* referrer_class, |
| ArtMethod* resolved_method, uint16_t method_idx, dex::TypeIndex* storage_index) { |
| std::pair<bool, bool> result = IsClassOfStaticMemberAvailableToReferrer( |
| dex_cache, referrer_class, resolved_method, method_idx, storage_index); |
| // Only the first member of `result` is meaningful, as there is no |
| // "write access" to a method. |
| return result.first; |
| } |
| |
| inline ArtMethod* CompilerDriver::ResolveMethod( |
| ScopedObjectAccess& soa, Handle<mirror::DexCache> dex_cache, |
| Handle<mirror::ClassLoader> class_loader, const DexCompilationUnit* mUnit, |
| uint32_t method_idx, InvokeType invoke_type, bool check_incompatible_class_change) { |
| DCHECK_EQ(class_loader.Get(), mUnit->GetClassLoader().Get()); |
| ArtMethod* resolved_method = |
| check_incompatible_class_change |
| ? mUnit->GetClassLinker()->ResolveMethod<ClassLinker::kForceICCECheck>( |
| *dex_cache->GetDexFile(), method_idx, dex_cache, class_loader, nullptr, invoke_type) |
| : mUnit->GetClassLinker()->ResolveMethod<ClassLinker::kNoICCECheckForCache>( |
| *dex_cache->GetDexFile(), method_idx, dex_cache, class_loader, nullptr, invoke_type); |
| if (UNLIKELY(resolved_method == nullptr)) { |
| DCHECK(soa.Self()->IsExceptionPending()); |
| // Clean up any exception left by type resolution. |
| soa.Self()->ClearException(); |
| } |
| return resolved_method; |
| } |
| |
| } // namespace art |
| |
| #endif // ART_COMPILER_DRIVER_COMPILER_DRIVER_INL_H_ |
