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4b9083329d
The string pool is shared among several units in the case of LTO, and it potentially can exceed the limit of 4GiB for an extremely large application. As it is now possible to emit 64-bit debugging info, the limitation can be removed. Differential Revision: https://reviews.llvm.org/D87025
67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
//===- llvm/CodeGen/DwarfStringPool.h - Dwarf Debug Framework ---*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/CodeGen/DwarfStringPoolEntry.h"
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#include "llvm/Support/Allocator.h"
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namespace llvm {
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class AsmPrinter;
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class MCSection;
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class MCSymbol;
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// Collection of strings for this unit and assorted symbols.
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// A String->Symbol mapping of strings used by indirect
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// references.
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class DwarfStringPool {
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using EntryTy = DwarfStringPoolEntry;
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StringMap<EntryTy, BumpPtrAllocator &> Pool;
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StringRef Prefix;
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uint64_t NumBytes = 0;
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unsigned NumIndexedStrings = 0;
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bool ShouldCreateSymbols;
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StringMapEntry<EntryTy> &getEntryImpl(AsmPrinter &Asm, StringRef Str);
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public:
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using EntryRef = DwarfStringPoolEntryRef;
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DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix);
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void emitStringOffsetsTableHeader(AsmPrinter &Asm, MCSection *OffsetSection,
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MCSymbol *StartSym);
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void emit(AsmPrinter &Asm, MCSection *StrSection,
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MCSection *OffsetSection = nullptr,
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bool UseRelativeOffsets = false);
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bool empty() const { return Pool.empty(); }
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unsigned size() const { return Pool.size(); }
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unsigned getNumIndexedStrings() const { return NumIndexedStrings; }
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/// Get a reference to an entry in the string pool.
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EntryRef getEntry(AsmPrinter &Asm, StringRef Str);
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/// Same as getEntry, except that you can use EntryRef::getIndex to obtain a
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/// unique ID of this entry (e.g., for use in indexed forms like
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/// DW_FORM_strx).
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EntryRef getIndexedEntry(AsmPrinter &Asm, StringRef Str);
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};
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} // end namespace llvm
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#endif // LLVM_LIB_CODEGEN_ASMPRINTER_DWARFSTRINGPOOL_H
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