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//===- DbiModuleList.h - PDB module information list ------------*- 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_PDB_NATIVE_DBIMODULELIST_H
#define LLVM_DEBUGINFO_PDB_NATIVE_DBIMODULELIST_H
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
#include "llvm/Support/BinaryStreamArray.h"
#include "llvm/Support/BinaryStreamRef.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Error.h"
#include <cstddef>
#include <cstdint>
#include <iterator>
#include <vector>
namespace llvm {
namespace pdb {
class DbiModuleList;
struct FileInfoSubstreamHeader;
class DbiModuleSourceFilesIterator
: public iterator_facade_base<DbiModuleSourceFilesIterator,
std::random_access_iterator_tag, StringRef> {
using BaseType =
iterator_facade_base<DbiModuleSourceFilesIterator,
std::random_access_iterator_tag, StringRef>;
public:
DbiModuleSourceFilesIterator(const DbiModuleList &Modules, uint32_t Modi,
uint16_t Filei);
DbiModuleSourceFilesIterator() = default;
DbiModuleSourceFilesIterator &
operator=(const DbiModuleSourceFilesIterator &R) = default;
bool operator==(const DbiModuleSourceFilesIterator &R) const;
const StringRef &operator*() const { return ThisValue; }
StringRef &operator*() { return ThisValue; }
bool operator<(const DbiModuleSourceFilesIterator &RHS) const;
std::ptrdiff_t operator-(const DbiModuleSourceFilesIterator &R) const;
DbiModuleSourceFilesIterator &operator+=(std::ptrdiff_t N);
DbiModuleSourceFilesIterator &operator-=(std::ptrdiff_t N);
private:
void setValue();
bool isEnd() const;
bool isCompatible(const DbiModuleSourceFilesIterator &R) const;
bool isUniversalEnd() const;
StringRef ThisValue;
const DbiModuleList *Modules{nullptr};
uint32_t Modi{0};
uint16_t Filei{0};
};
class DbiModuleList {
friend DbiModuleSourceFilesIterator;
public:
Error initialize(BinaryStreamRef ModInfo, BinaryStreamRef FileInfo);
Expected<StringRef> getFileName(uint32_t Index) const;
uint32_t getModuleCount() const;
uint32_t getSourceFileCount() const;
uint16_t getSourceFileCount(uint32_t Modi) const;
iterator_range<DbiModuleSourceFilesIterator>
source_files(uint32_t Modi) const;
DbiModuleDescriptor getModuleDescriptor(uint32_t Modi) const;
private:
Error initializeModInfo(BinaryStreamRef ModInfo);
Error initializeFileInfo(BinaryStreamRef FileInfo);
VarStreamArray<DbiModuleDescriptor> Descriptors;
FixedStreamArray<support::little32_t> FileNameOffsets;
FixedStreamArray<support::ulittle16_t> ModFileCountArray;
// For each module, there are multiple filenames, which can be obtained by
// knowing the index of the file. Given the index of the file, one can use
// that as an offset into the FileNameOffsets array, which contains the
// absolute offset of the file name in NamesBuffer. Thus, for each module
// we store the first index in the FileNameOffsets array for this module.
// The number of files for the corresponding module is stored in
// ModFileCountArray.
std::vector<uint32_t> ModuleInitialFileIndex;
// In order to provide random access into the Descriptors array, we iterate it
// once up front to find the offsets of the individual items and store them in
// this array.
std::vector<uint32_t> ModuleDescriptorOffsets;
const FileInfoSubstreamHeader *FileInfoHeader = nullptr;
BinaryStreamRef ModInfoSubstream;
BinaryStreamRef FileInfoSubstream;
BinaryStreamRef NamesBuffer;
};
} // end namespace pdb
} // end namespace llvm
#endif // LLVM_DEBUGINFO_PDB_NATIVE_DBIMODULELIST_H
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