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70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
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//===- TypeReferenceTracker.h --------------------------------- *- 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_TOOLS_LLVMPDBDUMP_TYPEREFERENCETRACKER_H
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#define LLVM_TOOLS_LLVMPDBDUMP_TYPEREFERENCETRACKER_H
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#include "InputFile.h"
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#include "llvm/ADT/BitVector.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/DebugInfo/CodeView/CVRecord.h"
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#include "llvm/DebugInfo/CodeView/TypeIndex.h"
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#include "llvm/DebugInfo/CodeView/TypeIndexDiscovery.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace pdb {
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class TpiStream;
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/// Maintains bitvector to track whether a type was referenced by a symbol
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/// record.
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class TypeReferenceTracker {
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public:
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TypeReferenceTracker(InputFile &File);
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// Do the work of marking referenced types.
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void mark();
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// Return true if a symbol record transitively references this type.
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bool isTypeReferenced(codeview::TypeIndex TI) {
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return TI.toArrayIndex() <= NumTypeRecords &&
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TypeReferenced.test(TI.toArrayIndex());
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}
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private:
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void addTypeRefsFromSymbol(const codeview::CVSymbol &Sym);
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// Mark types on this list as referenced.
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void addReferencedTypes(ArrayRef<uint8_t> RecData,
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ArrayRef<codeview::TiReference> Refs);
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// Consume all types on the worklist.
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void markReferencedTypes();
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void addOneTypeRef(codeview::TiRefKind RefKind, codeview::TypeIndex RefTI);
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InputFile &File;
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codeview::LazyRandomTypeCollection &Types;
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codeview::LazyRandomTypeCollection *Ids = nullptr;
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TpiStream *Tpi = nullptr;
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BitVector TypeReferenced;
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BitVector IdReferenced;
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SmallVector<std::pair<codeview::TiRefKind, codeview::TypeIndex>, 10>
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RefWorklist;
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uint32_t NumTypeRecords = 0;
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uint32_t NumIdRecords = 0;
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};
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} // namespace pdb
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} // namespace llvm
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#endif // LLVM_TOOLS_LLVMPDBDUMP_TYPEREFERENCETRACKER_H
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