| /* |
| * Copyright (C) 2016 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. |
| */ |
| |
| #include "class_ext-inl.h" |
| |
| #include "art_method-inl.h" |
| #include "base/casts.h" |
| #include "base/enums.h" |
| #include "base/utils.h" |
| #include "class-inl.h" |
| #include "class_root.h" |
| #include "dex/dex_file-inl.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "object-inl.h" |
| #include "object_array.h" |
| #include "stack_trace_element.h" |
| #include "well_known_classes.h" |
| |
| namespace art { |
| namespace mirror { |
| |
| uint32_t ClassExt::ClassSize(PointerSize pointer_size) { |
| uint32_t vtable_entries = Object::kVTableLength; |
| return Class::ComputeClassSize(true, vtable_entries, 0, 0, 0, 0, 0, pointer_size); |
| } |
| |
| void ClassExt::SetObsoleteArrays(ObjPtr<PointerArray> methods, |
| ObjPtr<ObjectArray<DexCache>> dex_caches) { |
| CHECK_EQ(methods.IsNull(), dex_caches.IsNull()); |
| auto obsolete_dex_cache_off = OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_dex_caches_); |
| auto obsolete_methods_off = OFFSET_OF_OBJECT_MEMBER(ClassExt, obsolete_methods_); |
| DCHECK(!Runtime::Current()->IsActiveTransaction()); |
| SetFieldObject<false>(obsolete_dex_cache_off, dex_caches.Ptr()); |
| SetFieldObject<false>(obsolete_methods_off, methods.Ptr()); |
| } |
| |
| // We really need to be careful how we update this. If we ever in the future make it so that |
| // these arrays are written into without all threads being suspended we have a race condition! This |
| // race could cause obsolete methods to be missed. |
| bool ClassExt::ExtendObsoleteArrays(Thread* self, uint32_t increase) { |
| // TODO It would be good to check that we have locked the class associated with this ClassExt. |
| StackHandleScope<5> hs(self); |
| Handle<ClassExt> h_this(hs.NewHandle(this)); |
| Handle<PointerArray> old_methods(hs.NewHandle(h_this->GetObsoleteMethods())); |
| Handle<ObjectArray<DexCache>> old_dex_caches(hs.NewHandle(h_this->GetObsoleteDexCaches())); |
| ClassLinker* cl = Runtime::Current()->GetClassLinker(); |
| size_t new_len; |
| if (old_methods == nullptr) { |
| CHECK(old_dex_caches == nullptr); |
| new_len = increase; |
| } else { |
| CHECK_EQ(old_methods->GetLength(), old_dex_caches->GetLength()); |
| new_len = increase + old_methods->GetLength(); |
| } |
| Handle<PointerArray> new_methods(hs.NewHandle<PointerArray>( |
| cl->AllocPointerArray(self, new_len))); |
| if (new_methods.IsNull()) { |
| // Fail. |
| self->AssertPendingOOMException(); |
| return false; |
| } |
| Handle<ObjectArray<DexCache>> new_dex_caches(hs.NewHandle<ObjectArray<DexCache>>( |
| ObjectArray<DexCache>::Alloc(self, |
| cl->FindClass(self, |
| "[Ljava/lang/DexCache;", |
| ScopedNullHandle<ClassLoader>()), |
| new_len))); |
| if (new_dex_caches.IsNull()) { |
| // Fail. |
| self->AssertPendingOOMException(); |
| return false; |
| } |
| |
| if (!old_methods.IsNull()) { |
| // Copy the old contents. |
| new_methods->Memcpy(0, |
| old_methods.Get(), |
| 0, |
| old_methods->GetLength(), |
| cl->GetImagePointerSize()); |
| new_dex_caches->AsObjectArray<Object>()->AssignableCheckingMemcpy<false>( |
| 0, old_dex_caches->AsObjectArray<Object>(), 0, old_dex_caches->GetLength(), false); |
| } |
| // Set the fields. |
| h_this->SetObsoleteArrays(new_methods.Get(), new_dex_caches.Get()); |
| |
| return true; |
| } |
| |
| ClassExt* ClassExt::Alloc(Thread* self) { |
| return down_cast<ClassExt*>(GetClassRoot<ClassExt>()->AllocObject(self).Ptr()); |
| } |
| |
| void ClassExt::SetVerifyError(ObjPtr<Object> err) { |
| if (Runtime::Current()->IsActiveTransaction()) { |
| SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(ClassExt, verify_error_), err); |
| } else { |
| SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(ClassExt, verify_error_), err); |
| } |
| } |
| |
| void ClassExt::SetOriginalDexFile(ObjPtr<Object> bytes) { |
| DCHECK(!Runtime::Current()->IsActiveTransaction()); |
| SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(ClassExt, original_dex_file_), bytes); |
| } |
| |
| } // namespace mirror |
| } // namespace art |