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//===- ModuleSubstreamVisitor.h ---------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_CODEVIEW_MODULESUBSTREAMVISITOR_H
#define LLVM_DEBUGINFO_CODEVIEW_MODULESUBSTREAMVISITOR_H
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/CodeViewError.h"
#include "llvm/DebugInfo/CodeView/Line.h"
#include "llvm/DebugInfo/CodeView/ModuleSubstream.h"
#include "llvm/DebugInfo/CodeView/StreamReader.h"
#include "llvm/DebugInfo/CodeView/StreamRef.h"
namespace llvm {
namespace codeview {
struct LineColumnEntry {
support::ulittle32_t NameIndex;
FixedStreamArray<LineNumberEntry> LineNumbers;
FixedStreamArray<ColumnNumberEntry> Columns;
};
template <> class VarStreamArrayExtractor<LineColumnEntry> {
public:
VarStreamArrayExtractor(const LineSubstreamHeader *Header) : Header(Header) {}
Error operator()(StreamRef Stream, uint32_t &Len,
LineColumnEntry &Item) const {
const LineFileBlockHeader *BlockHeader;
StreamReader Reader(Stream);
if (auto EC = Reader.readObject(BlockHeader))
return EC;
bool HasColumn = Header->Flags & LineFlags::HaveColumns;
uint32_t LineInfoSize =
BlockHeader->NumLines *
(sizeof(LineNumberEntry) + (HasColumn ? sizeof(ColumnNumberEntry) : 0));
if (BlockHeader->BlockSize < sizeof(LineFileBlockHeader))
return make_error<CodeViewError>(cv_error_code::corrupt_record,
"Invalid line block record size");
uint32_t Size = BlockHeader->BlockSize - sizeof(LineFileBlockHeader);
if (LineInfoSize > Size)
return make_error<CodeViewError>(cv_error_code::corrupt_record,
"Invalid line block record size");
// The value recorded in BlockHeader->BlockSize includes the size of
// LineFileBlockHeader.
Len = BlockHeader->BlockSize;
Item.NameIndex = BlockHeader->NameIndex;
if (auto EC = Reader.readArray(Item.LineNumbers, BlockHeader->NumLines))
return EC;
if (HasColumn) {
if (auto EC = Reader.readArray(Item.Columns, BlockHeader->NumLines))
return EC;
}
return Error::success();
}
private:
const LineSubstreamHeader *Header;
};
struct FileChecksumEntry {
uint32_t FileNameOffset; // Byte offset of filename in global stringtable.
FileChecksumKind Kind; // The type of checksum.
ArrayRef<uint8_t> Checksum; // The bytes of the checksum.
};
template <> class VarStreamArrayExtractor<FileChecksumEntry> {
public:
Error operator()(StreamRef Stream, uint32_t &Len,
FileChecksumEntry &Item) const {
const FileChecksum *Header;
StreamReader Reader(Stream);
if (auto EC = Reader.readObject(Header))
return EC;
Item.FileNameOffset = Header->FileNameOffset;
Item.Kind = static_cast<FileChecksumKind>(Header->ChecksumKind);
if (auto EC = Reader.readBytes(Item.Checksum, Header->ChecksumSize))
return EC;
Len = sizeof(FileChecksum) + Header->ChecksumSize;
return Error::success();
}
};
typedef VarStreamArray<LineColumnEntry> LineInfoArray;
typedef VarStreamArray<FileChecksumEntry> FileChecksumArray;
class IModuleSubstreamVisitor {
public:
virtual ~IModuleSubstreamVisitor() {}
virtual Error visitUnknown(ModuleSubstreamKind Kind, StreamRef Data) = 0;
virtual Error visitSymbols(StreamRef Data);
virtual Error visitLines(StreamRef Data, const LineSubstreamHeader *Header,
const LineInfoArray &Lines);
virtual Error visitStringTable(StreamRef Data);
virtual Error visitFileChecksums(StreamRef Data,
const FileChecksumArray &Checksums);
virtual Error visitFrameData(StreamRef Data);
virtual Error visitInlineeLines(StreamRef Data);
virtual Error visitCrossScopeImports(StreamRef Data);
virtual Error visitCrossScopeExports(StreamRef Data);
virtual Error visitILLines(StreamRef Data);
virtual Error visitFuncMDTokenMap(StreamRef Data);
virtual Error visitTypeMDTokenMap(StreamRef Data);
virtual Error visitMergedAssemblyInput(StreamRef Data);
virtual Error visitCoffSymbolRVA(StreamRef Data);
};
Error visitModuleSubstream(const ModuleSubstream &R,
IModuleSubstreamVisitor &V);
} // namespace codeview
} // namespace llvm
#endif // LLVM_DEBUGINFO_CODEVIEW_MODULESUBSTREAMVISITOR_H
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