1 /* 2 * Copyright (C) 2012 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_DEX2OAT_DRIVER_COMPILER_DRIVER_INL_H_ 18 #define ART_DEX2OAT_DRIVER_COMPILER_DRIVER_INL_H_ 19 20 #include "compiler_driver.h" 21 22 #include "art_field-inl.h" 23 #include "art_method-inl.h" 24 #include "base/pointer_size.h" 25 #include "class_linker-inl.h" 26 #include "driver/dex_compilation_unit.h" 27 #include "handle_scope-inl.h" 28 #include "mirror/class_loader.h" 29 #include "mirror/dex_cache-inl.h" 30 #include "runtime.h" 31 #include "scoped_thread_state_change-inl.h" 32 33 namespace art { 34 ResolveClass(const ScopedObjectAccess & soa,Handle<mirror::DexCache> dex_cache,Handle<mirror::ClassLoader> class_loader,dex::TypeIndex cls_index,const DexCompilationUnit * mUnit)35 inline ObjPtr<mirror::Class> CompilerDriver::ResolveClass( 36 const ScopedObjectAccess& soa, 37 Handle<mirror::DexCache> dex_cache, 38 Handle<mirror::ClassLoader> class_loader, 39 dex::TypeIndex cls_index, 40 const DexCompilationUnit* mUnit) { 41 DCHECK_EQ(dex_cache->GetDexFile(), mUnit->GetDexFile()); 42 DCHECK_EQ(class_loader.Get(), mUnit->GetClassLoader().Get()); 43 ObjPtr<mirror::Class> cls = 44 mUnit->GetClassLinker()->ResolveType(cls_index, dex_cache, class_loader); 45 DCHECK_EQ(cls == nullptr, soa.Self()->IsExceptionPending()); 46 if (UNLIKELY(cls == nullptr)) { 47 // Clean up any exception left by type resolution. 48 soa.Self()->ClearException(); 49 } 50 return cls; 51 } 52 ResolveCompilingMethodsClass(const ScopedObjectAccess & soa,Handle<mirror::DexCache> dex_cache,Handle<mirror::ClassLoader> class_loader,const DexCompilationUnit * mUnit)53 inline ObjPtr<mirror::Class> CompilerDriver::ResolveCompilingMethodsClass( 54 const ScopedObjectAccess& soa, 55 Handle<mirror::DexCache> dex_cache, 56 Handle<mirror::ClassLoader> class_loader, 57 const DexCompilationUnit* mUnit) { 58 DCHECK_EQ(dex_cache->GetDexFile(), mUnit->GetDexFile()); 59 DCHECK_EQ(class_loader.Get(), mUnit->GetClassLoader().Get()); 60 const dex::MethodId& referrer_method_id = 61 mUnit->GetDexFile()->GetMethodId(mUnit->GetDexMethodIndex()); 62 return ResolveClass(soa, dex_cache, class_loader, referrer_method_id.class_idx_, mUnit); 63 } 64 ResolveField(const ScopedObjectAccess & soa,Handle<mirror::DexCache> dex_cache,Handle<mirror::ClassLoader> class_loader,uint32_t field_idx,bool is_static)65 inline ArtField* CompilerDriver::ResolveField(const ScopedObjectAccess& soa, 66 Handle<mirror::DexCache> dex_cache, 67 Handle<mirror::ClassLoader> class_loader, 68 uint32_t field_idx, 69 bool is_static) { 70 ArtField* resolved_field = Runtime::Current()->GetClassLinker()->ResolveField( 71 field_idx, dex_cache, class_loader, is_static); 72 DCHECK_EQ(resolved_field == nullptr, soa.Self()->IsExceptionPending()); 73 if (UNLIKELY(resolved_field == nullptr)) { 74 // Clean up any exception left by type resolution. 75 soa.Self()->ClearException(); 76 return nullptr; 77 } 78 if (UNLIKELY(resolved_field->IsStatic() != is_static)) { 79 // ClassLinker can return a field of the wrong kind directly from the DexCache. 80 // Silently return null on such incompatible class change. 81 return nullptr; 82 } 83 return resolved_field; 84 } 85 IsFastInstanceField(ObjPtr<mirror::DexCache> dex_cache,ObjPtr<mirror::Class> referrer_class,ArtField * resolved_field,uint16_t field_idx)86 inline std::pair<bool, bool> CompilerDriver::IsFastInstanceField( 87 ObjPtr<mirror::DexCache> dex_cache, 88 ObjPtr<mirror::Class> referrer_class, 89 ArtField* resolved_field, 90 uint16_t field_idx) { 91 DCHECK(!resolved_field->IsStatic()); 92 ObjPtr<mirror::Class> fields_class = resolved_field->GetDeclaringClass(); 93 bool fast_get = referrer_class != nullptr && 94 referrer_class->CanAccessResolvedField(fields_class, 95 resolved_field, 96 dex_cache, 97 field_idx); 98 bool fast_put = fast_get && (!resolved_field->IsFinal() || fields_class == referrer_class); 99 return std::make_pair(fast_get, fast_put); 100 } 101 102 } // namespace art 103 104 #endif // ART_DEX2OAT_DRIVER_COMPILER_DRIVER_INL_H_ 105