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4ab13f5ec5
This provides a better layering of responsibilities among different aspects of PDB writing code. Some of the MSF related code was contained in CodeView, and some was in PDB prior to this. Further, we were often saying PDB when we meant MSF, and the two are actually independent of each other since in theory you can have other types of data besides PDB data in an MSF. So, this patch separates the MSF specific code into its own library, with no dependencies on anything else, and DebugInfoCodeView and DebugInfoPDB take dependencies on DebugInfoMsf. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276458 91177308-0d34-0410-b5e6-96231b3b80d8
90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//===- ModuleSubstream.h ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_CODEVIEW_MODULESUBSTREAM_H
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#define LLVM_DEBUGINFO_CODEVIEW_MODULESUBSTREAM_H
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/Msf/StreamArray.h"
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#include "llvm/DebugInfo/Msf/StreamRef.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace codeview {
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// Corresponds to the `CV_DebugSSubsectionHeader_t` structure.
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struct ModuleSubsectionHeader {
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support::ulittle32_t Kind; // codeview::ModuleSubstreamKind enum
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support::ulittle32_t Length; // number of bytes occupied by this record.
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};
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// Corresponds to the `CV_DebugSLinesHeader_t` structure.
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struct LineSubstreamHeader {
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support::ulittle32_t RelocOffset; // Code offset of line contribution.
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support::ulittle16_t RelocSegment; // Code segment of line contribution.
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support::ulittle16_t Flags; // See LineFlags enumeration.
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support::ulittle32_t CodeSize; // Code size of this line contribution.
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};
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// Corresponds to the `CV_DebugSLinesFileBlockHeader_t` structure.
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struct LineFileBlockHeader {
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support::ulittle32_t NameIndex; // Index in DBI name buffer of filename.
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support::ulittle32_t NumLines; // Number of lines
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support::ulittle32_t BlockSize; // Code size of block, in bytes.
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// The following two variable length arrays appear immediately after the
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// header. The structure definitions follow.
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// LineNumberEntry Lines[NumLines];
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// ColumnNumberEntry Columns[NumLines];
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};
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// Corresponds to `CV_Line_t` structure
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struct LineNumberEntry {
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support::ulittle32_t Offset; // Offset to start of code bytes for line number
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support::ulittle32_t Flags; // Start:24, End:7, IsStatement:1
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};
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// Corresponds to `CV_Column_t` structure
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struct ColumnNumberEntry {
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support::ulittle16_t StartColumn;
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support::ulittle16_t EndColumn;
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};
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class ModuleSubstream {
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public:
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ModuleSubstream();
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ModuleSubstream(ModuleSubstreamKind Kind, msf::StreamRef Data);
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static Error initialize(msf::StreamRef Stream, ModuleSubstream &Info);
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uint32_t getRecordLength() const;
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ModuleSubstreamKind getSubstreamKind() const;
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msf::StreamRef getRecordData() const;
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private:
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ModuleSubstreamKind Kind;
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msf::StreamRef Data;
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};
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typedef msf::VarStreamArray<ModuleSubstream> ModuleSubstreamArray;
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} // namespace codeview
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namespace msf {
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template <> struct VarStreamArrayExtractor<codeview::ModuleSubstream> {
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Error operator()(StreamRef Stream, uint32_t &Length,
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codeview::ModuleSubstream &Info) const {
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if (auto EC = codeview::ModuleSubstream::initialize(Stream, Info))
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return EC;
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Length = Info.getRecordLength();
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return Error::success();
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}
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};
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} // namespace msf
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} // namespace llvm
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#endif // LLVM_DEBUGINFO_CODEVIEW_MODULESUBSTREAM_H
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