WebSVN – QNX 8.QNX8 LLVM/Clang compiler suite – Blame – /llvm-build/x86_64/include/llvm/DebugInfo/CodeView/DebugLinesSubsection.h

Rev	Author	Line No.	Line
14	pmbaty	1	//===- DebugLinesSubsection.h ------------------------------------ C++ --===//
		2	//
		3	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
		4	// See https://llvm.org/LICENSE.txt for license information.
		5	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
		6	//
		7	//===----------------------------------------------------------------------===//
		8
		9	#ifndef LLVM_DEBUGINFO_CODEVIEW_DEBUGLINESSUBSECTION_H
		10	#define LLVM_DEBUGINFO_CODEVIEW_DEBUGLINESSUBSECTION_H
		11
		12	#include "llvm/ADT/StringRef.h"
		13	#include "llvm/DebugInfo/CodeView/CodeView.h"
		14	#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
		15	#include "llvm/DebugInfo/CodeView/Line.h"
		16	#include "llvm/Support/BinaryStreamArray.h"
		17	#include "llvm/Support/BinaryStreamRef.h"
		18	#include "llvm/Support/Endian.h"
		19	#include "llvm/Support/Error.h"
		20	#include <cstdint>
		21	#include <vector>
		22
		23	namespace llvm {
		24	class BinaryStreamReader;
		25	class BinaryStreamWriter;
		26	namespace codeview {
		27
		28	class DebugChecksumsSubsection;
		29	class DebugStringTableSubsection;
		30
		31	// Corresponds to the `CV_DebugSLinesHeader_t` structure.
		32	struct LineFragmentHeader {
		33	support::ulittle32_t RelocOffset; // Code offset of line contribution.
		34	support::ulittle16_t RelocSegment; // Code segment of line contribution.
		35	support::ulittle16_t Flags; // See LineFlags enumeration.
		36	support::ulittle32_t CodeSize; // Code size of this line contribution.
		37	};
		38
		39	// Corresponds to the `CV_DebugSLinesFileBlockHeader_t` structure.
		40	struct LineBlockFragmentHeader {
		41	support::ulittle32_t NameIndex; // Offset of FileChecksum entry in File
		42	// checksums buffer. The checksum entry then
		43	// contains another offset into the string
		44	// table of the actual name.
		45	support::ulittle32_t NumLines; // Number of lines
		46	support::ulittle32_t BlockSize; // Code size of block, in bytes.
		47	// The following two variable length arrays appear immediately after the
		48	// header. The structure definitions follow.
		49	// LineNumberEntry Lines[NumLines];
		50	// ColumnNumberEntry Columns[NumLines];
		51	};
		52
		53	// Corresponds to `CV_Line_t` structure
		54	struct LineNumberEntry {
		55	support::ulittle32_t Offset; // Offset to start of code bytes for line number
		56	support::ulittle32_t Flags; // Start:24, End:7, IsStatement:1
		57	};
		58
		59	// Corresponds to `CV_Column_t` structure
		60	struct ColumnNumberEntry {
		61	support::ulittle16_t StartColumn;
		62	support::ulittle16_t EndColumn;
		63	};
		64
		65	struct LineColumnEntry {
		66	support::ulittle32_t NameIndex;
		67	FixedStreamArray<LineNumberEntry> LineNumbers;
		68	FixedStreamArray<ColumnNumberEntry> Columns;
		69	};
		70
		71	class LineColumnExtractor {
		72	public:
		73	Error operator()(BinaryStreamRef Stream, uint32_t &Len,
		74	LineColumnEntry &Item);
		75
		76	const LineFragmentHeader *Header = nullptr;
		77	};
		78
		79	class DebugLinesSubsectionRef final : public DebugSubsectionRef {
		80	friend class LineColumnExtractor;
		81
		82	using LineInfoArray = VarStreamArray<LineColumnEntry, LineColumnExtractor>;
		83	using Iterator = LineInfoArray::Iterator;
		84
		85	public:
		86	DebugLinesSubsectionRef();
		87
		88	static bool classof(const DebugSubsectionRef *S) {
		89	return S->kind() == DebugSubsectionKind::Lines;
		90	}
		91
		92	Error initialize(BinaryStreamReader Reader);
		93
		94	Iterator begin() const { return LinesAndColumns.begin(); }
		95	Iterator end() const { return LinesAndColumns.end(); }
		96
		97	const LineFragmentHeader *header() const { return Header; }
		98
		99	bool hasColumnInfo() const;
		100
		101	private:
		102	const LineFragmentHeader *Header = nullptr;
		103	LineInfoArray LinesAndColumns;
		104	};
		105
		106	class DebugLinesSubsection final : public DebugSubsection {
		107	struct Block {
		108	Block(uint32_t ChecksumBufferOffset)
		109	: ChecksumBufferOffset(ChecksumBufferOffset) {}
		110
		111	uint32_t ChecksumBufferOffset;
		112	std::vector<LineNumberEntry> Lines;
		113	std::vector<ColumnNumberEntry> Columns;
		114	};
		115
		116	public:
		117	DebugLinesSubsection(DebugChecksumsSubsection &Checksums,
		118	DebugStringTableSubsection &Strings);
		119
		120	static bool classof(const DebugSubsection *S) {
		121	return S->kind() == DebugSubsectionKind::Lines;
		122	}
		123
		124	void createBlock(StringRef FileName);
		125	void addLineInfo(uint32_t Offset, const LineInfo &Line);
		126	void addLineAndColumnInfo(uint32_t Offset, const LineInfo &Line,
		127	uint32_t ColStart, uint32_t ColEnd);
		128
		129	uint32_t calculateSerializedSize() const override;
		130	Error commit(BinaryStreamWriter &Writer) const override;
		131
		132	void setRelocationAddress(uint16_t Segment, uint32_t Offset);
		133	void setCodeSize(uint32_t Size);
		134	void setFlags(LineFlags Flags);
		135
		136	bool hasColumnInfo() const;
		137
		138	private:
		139	DebugChecksumsSubsection &Checksums;
		140	uint32_t RelocOffset = 0;
		141	uint16_t RelocSegment = 0;
		142	uint32_t CodeSize = 0;
		143	LineFlags Flags = LF_None;
		144	std::vector<Block> Blocks;
		145	};
		146
		147	} // end namespace codeview
		148	} // end namespace llvm
		149
		150	#endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGLINESSUBSECTION_H

Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

QNX 8.QNX8 LLVM/Clang compiler suite/llvm-build/x86_64/include/llvm/DebugInfo/CodeView/DebugLinesSubsection.h – Rev 14