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| //===- StringsAndChecksums.h ------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_CODEVIEW_STRINGSANDCHECKSUMS_H
#define LLVM_DEBUGINFO_CODEVIEW_STRINGSANDCHECKSUMS_H
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
#include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h"
#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
#include <memory>
namespace llvm {
namespace codeview {
class StringsAndChecksumsRef {
public:
// If no subsections are known about initially, we find as much as we can.
StringsAndChecksumsRef();
// If only a string table subsection is given, we find a checksums subsection.
explicit StringsAndChecksumsRef(const DebugStringTableSubsectionRef &Strings);
// If both subsections are given, we don't need to find anything.
StringsAndChecksumsRef(const DebugStringTableSubsectionRef &Strings,
const DebugChecksumsSubsectionRef &Checksums);
void setStrings(const DebugStringTableSubsectionRef &Strings);
void setChecksums(const DebugChecksumsSubsectionRef &CS);
void reset();
void resetStrings();
void resetChecksums();
template <typename T> void initialize(T &&FragmentRange) {
for (const DebugSubsectionRecord &R : FragmentRange) {
if (Strings && Checksums)
return;
if (R.kind() == DebugSubsectionKind::FileChecksums) {
initializeChecksums(R);
continue;
}
if (R.kind() == DebugSubsectionKind::StringTable && !Strings) {
// While in practice we should never encounter a string table even
// though the string table is already initialized, in theory it's
// possible. PDBs are supposed to have one global string table and
// then this subsection should not appear. Whereas object files are
// supposed to have this subsection appear exactly once. However,
// for testing purposes it's nice to be able to test this subsection
// independently of one format or the other, so for some tests we
// manually construct a PDB that contains this subsection in addition
// to a global string table.
initializeStrings(R);
continue;
}
}
}
const DebugStringTableSubsectionRef &strings() const { return *Strings; }
const DebugChecksumsSubsectionRef &checksums() const { return *Checksums; }
bool hasStrings() const { return Strings != nullptr; }
bool hasChecksums() const { return Checksums != nullptr; }
private:
void initializeStrings(const DebugSubsectionRecord &SR);
void initializeChecksums(const DebugSubsectionRecord &FCR);
std::shared_ptr<DebugStringTableSubsectionRef> OwnedStrings;
std::shared_ptr<DebugChecksumsSubsectionRef> OwnedChecksums;
const DebugStringTableSubsectionRef *Strings = nullptr;
const DebugChecksumsSubsectionRef *Checksums = nullptr;
};
class StringsAndChecksums {
public:
using StringsPtr = std::shared_ptr<DebugStringTableSubsection>;
using ChecksumsPtr = std::shared_ptr<DebugChecksumsSubsection>;
// If no subsections are known about initially, we find as much as we can.
StringsAndChecksums() = default;
void setStrings(const StringsPtr &SP) { Strings = SP; }
void setChecksums(const ChecksumsPtr &CP) { Checksums = CP; }
const StringsPtr &strings() const { return Strings; }
const ChecksumsPtr &checksums() const { return Checksums; }
bool hasStrings() const { return Strings != nullptr; }
bool hasChecksums() const { return Checksums != nullptr; }
private:
StringsPtr Strings;
ChecksumsPtr Checksums;
};
} // end namespace codeview
} // end namespace llvm
#endif // LLVM_DEBUGINFO_CODEVIEW_STRINGSANDCHECKSUMS_H
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