1 /* 2 * Copyright (C) 2023 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 #include "class_linker.h" 18 #include "code_generation_data.h" 19 #include "code_generator.h" 20 #include "intern_table.h" 21 #include "mirror/object-inl.h" 22 #include "runtime.h" 23 24 namespace art HIDDEN { 25 EmitJitRoots(std::vector<Handle<mirror::Object>> * roots)26void CodeGenerationData::EmitJitRoots( 27 /*out*/std::vector<Handle<mirror::Object>>* roots) { 28 DCHECK(roots->empty()); 29 roots->reserve(GetNumberOfJitRoots()); 30 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 31 size_t index = 0; 32 for (auto& entry : jit_string_roots_) { 33 // Update the `roots` with the string, and replace the address temporarily 34 // stored to the index in the table. 35 uint64_t address = entry.second; 36 roots->emplace_back(reinterpret_cast<StackReference<mirror::Object>*>(address)); 37 DCHECK(roots->back() != nullptr); 38 DCHECK(roots->back()->IsString()); 39 entry.second = index; 40 // Ensure the string is strongly interned. This is a requirement on how the JIT 41 // handles strings. b/32995596 42 class_linker->GetInternTable()->InternStrong(roots->back()->AsString()); 43 ++index; 44 } 45 for (auto& entry : jit_class_roots_) { 46 // Update the `roots` with the class, and replace the address temporarily 47 // stored to the index in the table. 48 uint64_t address = entry.second; 49 roots->emplace_back(reinterpret_cast<StackReference<mirror::Object>*>(address)); 50 DCHECK(roots->back() != nullptr); 51 DCHECK(roots->back()->IsClass()); 52 entry.second = index; 53 ++index; 54 } 55 } 56 57 } // namespace art 58