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88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
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//===- 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/CodeView/StreamArray.h"
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#include "llvm/DebugInfo/CodeView/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, StreamRef Data);
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static Error initialize(StreamRef Stream, ModuleSubstream &Info);
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uint32_t getRecordLength() const;
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ModuleSubstreamKind getSubstreamKind() const;
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StreamRef getRecordData() const;
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private:
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ModuleSubstreamKind Kind;
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StreamRef Data;
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};
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template <> struct VarStreamArrayExtractor<ModuleSubstream> {
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Error operator()(StreamRef Stream, uint32_t &Length,
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ModuleSubstream &Info) const {
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if (auto EC = 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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typedef VarStreamArray<ModuleSubstream> ModuleSubstreamArray;
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}
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}
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#endif // LLVM_DEBUGINFO_CODEVIEW_MODULESUBSTREAM_H
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