1 //===- MergingTypeTableBuilder.h ---------------------------------*- C++-*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_DEBUGINFO_CODEVIEW_MERGINGTYPETABLEBUILDER_H 11 #define LLVM_DEBUGINFO_CODEVIEW_MERGINGTYPETABLEBUILDER_H 12 13 #include "llvm/ADT/ArrayRef.h" 14 #include "llvm/ADT/DenseSet.h" 15 #include "llvm/ADT/SmallVector.h" 16 #include "llvm/DebugInfo/CodeView/CodeView.h" 17 #include "llvm/DebugInfo/CodeView/SimpleTypeSerializer.h" 18 #include "llvm/DebugInfo/CodeView/TypeCollection.h" 19 #include "llvm/DebugInfo/CodeView/TypeHashing.h" 20 #include "llvm/DebugInfo/CodeView/TypeIndex.h" 21 #include "llvm/Support/Allocator.h" 22 #include <cassert> 23 #include <cstdint> 24 #include <memory> 25 #include <vector> 26 27 namespace llvm { 28 namespace codeview { 29 30 class ContinuationRecordBuilder; 31 32 class MergingTypeTableBuilder : public TypeCollection { 33 /// Storage for records. These need to outlive the TypeTableBuilder. 34 BumpPtrAllocator &RecordStorage; 35 36 /// A serializer that can write non-continuation leaf types. Only used as 37 /// a convenience function so that we can provide an interface method to 38 /// write an unserialized record. 39 SimpleTypeSerializer SimpleSerializer; 40 41 /// Hash table. 42 DenseMap<LocallyHashedType, TypeIndex> HashedRecords; 43 44 /// Contains a list of all records indexed by TypeIndex.toArrayIndex(). 45 SmallVector<ArrayRef<uint8_t>, 2> SeenRecords; 46 47 public: 48 explicit MergingTypeTableBuilder(BumpPtrAllocator &Storage); 49 ~MergingTypeTableBuilder(); 50 51 // TypeTableCollection overrides 52 Optional<TypeIndex> getFirst() override; 53 Optional<TypeIndex> getNext(TypeIndex Prev) override; 54 CVType getType(TypeIndex Index) override; 55 StringRef getTypeName(TypeIndex Index) override; 56 bool contains(TypeIndex Index) override; 57 uint32_t size() override; 58 uint32_t capacity() override; 59 60 // public interface 61 void reset(); 62 TypeIndex nextTypeIndex() const; 63 getAllocator()64 BumpPtrAllocator &getAllocator() { return RecordStorage; } 65 66 ArrayRef<ArrayRef<uint8_t>> records() const; 67 68 TypeIndex insertRecordAs(hash_code Hash, ArrayRef<uint8_t> &Record); 69 TypeIndex insertRecordBytes(ArrayRef<uint8_t> &Record); 70 TypeIndex insertRecord(ContinuationRecordBuilder &Builder); 71 writeLeafType(T & Record)72 template <typename T> TypeIndex writeLeafType(T &Record) { 73 ArrayRef<uint8_t> Data = SimpleSerializer.serialize(Record); 74 return insertRecordBytes(Data); 75 } 76 }; 77 78 } // end namespace codeview 79 } // end namespace llvm 80 81 #endif // LLVM_DEBUGINFO_CODEVIEW_MERGINGTYPETABLEBUILDER_H 82