97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
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//===- DebugStringTableSubsection.h - CodeView String Table -----*- 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_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
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#define LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
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#include "llvm/ADT/DenseMap.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/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
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#include "llvm/Support/BinaryStreamRef.h"
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#include "llvm/Support/Error.h"
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#include <cstdint>
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namespace llvm {
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class BinaryStreamReader;
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namespace codeview {
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/// Represents a read-only view of a CodeView string table. This is a very
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/// simple flat buffer consisting of null-terminated strings, where strings
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/// are retrieved by their offset in the buffer. DebugStringTableSubsectionRef
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/// does not own the underlying storage for the buffer.
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class DebugStringTableSubsectionRef : public DebugSubsectionRef {
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public:
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DebugStringTableSubsectionRef();
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static bool classof(const DebugSubsectionRef *S) {
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return S->kind() == DebugSubsectionKind::StringTable;
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}
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Error initialize(BinaryStreamRef Contents);
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Error initialize(BinaryStreamReader &Reader);
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Expected<StringRef> getString(uint32_t Offset) const;
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bool valid() const { return Stream.valid(); }
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BinaryStreamRef getBuffer() const { return Stream; }
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private:
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BinaryStreamRef Stream;
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};
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/// Represents a read-write view of a CodeView string table.
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/// DebugStringTableSubsection owns the underlying storage for the table, and is
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/// capable of serializing the string table into a format understood by
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/// DebugStringTableSubsectionRef.
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class DebugStringTableSubsection : public DebugSubsection {
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public:
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DebugStringTableSubsection();
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static bool classof(const DebugSubsection *S) {
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return S->kind() == DebugSubsectionKind::StringTable;
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}
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// If string S does not exist in the string table, insert it.
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// Returns the ID for S.
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uint32_t insert(StringRef S);
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// Return the ID for string S. Assumes S exists in the table.
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uint32_t getIdForString(StringRef S) const;
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StringRef getStringForId(uint32_t Id) const;
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uint32_t calculateSerializedSize() const override;
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Error commit(BinaryStreamWriter &Writer) const override;
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uint32_t size() const;
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StringMap<uint32_t>::const_iterator begin() const {
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return StringToId.begin();
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}
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StringMap<uint32_t>::const_iterator end() const { return StringToId.end(); }
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std::vector<uint32_t> sortedIds() const;
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private:
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DenseMap<uint32_t, StringRef> IdToString;
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StringMap<uint32_t> StringToId;
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uint32_t StringSize = 1;
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};
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} // end namespace codeview
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGSTRINGTABLESUBSECTION_H
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