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1//===- llvm/CodeGen/DwarfStringPool.h - Dwarf Debug Framework ---*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H10#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H11 12#include "llvm/ADT/StringMap.h"13#include "llvm/ADT/StringRef.h"14#include "llvm/CodeGen/DwarfStringPoolEntry.h"15#include "llvm/Support/Allocator.h"16#include "llvm/Support/Compiler.h"17 18namespace llvm {19 20class AsmPrinter;21class MCSection;22class MCSymbol;23 24// Collection of strings for this unit and assorted symbols.25// A String->Symbol mapping of strings used by indirect26// references.27class DwarfStringPool {28 using EntryTy = DwarfStringPoolEntry;29 30 StringMap<EntryTy, BumpPtrAllocator &> Pool;31 StringRef Prefix;32 uint64_t NumBytes = 0;33 unsigned NumIndexedStrings = 0;34 bool ShouldCreateSymbols;35 36 StringMapEntry<EntryTy> &getEntryImpl(AsmPrinter &Asm, StringRef Str);37 38public:39 using EntryRef = DwarfStringPoolEntryRef;40 41 LLVM_ABI_FOR_TEST DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm,42 StringRef Prefix);43 44 LLVM_ABI_FOR_TEST void emitStringOffsetsTableHeader(AsmPrinter &Asm,45 MCSection *OffsetSection,46 MCSymbol *StartSym);47 48 LLVM_ABI_FOR_TEST void emit(AsmPrinter &Asm, MCSection *StrSection,49 MCSection *OffsetSection = nullptr,50 bool UseRelativeOffsets = false);51 52 bool empty() const { return Pool.empty(); }53 54 unsigned size() const { return Pool.size(); }55 56 unsigned getNumIndexedStrings() const { return NumIndexedStrings; }57 58 /// Get a reference to an entry in the string pool.59 LLVM_ABI_FOR_TEST EntryRef getEntry(AsmPrinter &Asm, StringRef Str);60 61 /// Same as getEntry, except that you can use EntryRef::getIndex to obtain a62 /// unique ID of this entry (e.g., for use in indexed forms like63 /// DW_FORM_strx).64 LLVM_ABI_FOR_TEST EntryRef getIndexedEntry(AsmPrinter &Asm, StringRef Str);65};66 67} // end namespace llvm68 69#endif // LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H70