LLVM 20.0.0git
DebugLinesSubsection.cpp
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1//===- DebugLinesSubsection.cpp -------------------------------------------===//
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
10#include "llvm/ADT/ArrayRef.h"
16#include "llvm/Support/Error.h"
17#include <cassert>
18#include <cstdint>
19
20using namespace llvm;
21using namespace llvm::codeview;
22
24 LineColumnEntry &Item) {
25 const LineBlockFragmentHeader *BlockHeader;
26 BinaryStreamReader Reader(Stream);
27 if (auto EC = Reader.readObject(BlockHeader))
28 return EC;
29 bool HasColumn = Header->Flags & uint16_t(LF_HaveColumns);
30 uint32_t LineInfoSize =
31 BlockHeader->NumLines *
32 (sizeof(LineNumberEntry) + (HasColumn ? sizeof(ColumnNumberEntry) : 0));
33 if (BlockHeader->BlockSize < sizeof(LineBlockFragmentHeader))
34 return make_error<CodeViewError>(cv_error_code::corrupt_record,
35 "Invalid line block record size");
36 uint32_t Size = BlockHeader->BlockSize - sizeof(LineBlockFragmentHeader);
37 if (LineInfoSize > Size)
38 return make_error<CodeViewError>(cv_error_code::corrupt_record,
39 "Invalid line block record size");
40 // The value recorded in BlockHeader->BlockSize includes the size of
41 // LineBlockFragmentHeader.
42 Len = BlockHeader->BlockSize;
43 Item.NameIndex = BlockHeader->NameIndex;
44 if (auto EC = Reader.readArray(Item.LineNumbers, BlockHeader->NumLines))
45 return EC;
46 if (HasColumn) {
47 if (auto EC = Reader.readArray(Item.Columns, BlockHeader->NumLines))
48 return EC;
49 }
50 return Error::success();
51}
52
55
57 if (auto EC = Reader.readObject(Header))
58 return EC;
59
60 LinesAndColumns.getExtractor().Header = Header;
61 if (auto EC = Reader.readArray(LinesAndColumns, Reader.bytesRemaining()))
62 return EC;
63
64 return Error::success();
65}
66
68 return !!(Header->Flags & LF_HaveColumns);
69}
70
73 : DebugSubsection(DebugSubsectionKind::Lines), Checksums(Checksums) {}
74
76 uint32_t Offset = Checksums.mapChecksumOffset(FileName);
77
78 Blocks.emplace_back(Offset);
79}
80
82 Block &B = Blocks.back();
84 LNE.Flags = Line.getRawData();
85 LNE.Offset = Offset;
86 B.Lines.push_back(LNE);
87}
88
90 const LineInfo &Line,
91 uint32_t ColStart,
92 uint32_t ColEnd) {
93 Block &B = Blocks.back();
94 assert(B.Lines.size() == B.Columns.size());
95
98 CNE.StartColumn = ColStart;
99 CNE.EndColumn = ColEnd;
100 B.Columns.push_back(CNE);
101}
102
104 LineFragmentHeader Header;
105 Header.CodeSize = CodeSize;
106 Header.Flags = hasColumnInfo() ? LF_HaveColumns : 0;
107 Header.RelocOffset = RelocOffset;
108 Header.RelocSegment = RelocSegment;
109
110 if (auto EC = Writer.writeObject(Header))
111 return EC;
112
113 for (const auto &B : Blocks) {
114 LineBlockFragmentHeader BlockHeader;
115 assert(B.Lines.size() == B.Columns.size() || B.Columns.empty());
116
117 BlockHeader.NumLines = B.Lines.size();
118 BlockHeader.BlockSize = sizeof(LineBlockFragmentHeader);
119 BlockHeader.BlockSize += BlockHeader.NumLines * sizeof(LineNumberEntry);
120 if (hasColumnInfo())
121 BlockHeader.BlockSize += BlockHeader.NumLines * sizeof(ColumnNumberEntry);
122 BlockHeader.NameIndex = B.ChecksumBufferOffset;
123 if (auto EC = Writer.writeObject(BlockHeader))
124 return EC;
125
126 if (auto EC = Writer.writeArray(ArrayRef(B.Lines)))
127 return EC;
128
129 if (hasColumnInfo()) {
130 if (auto EC = Writer.writeArray(ArrayRef(B.Columns)))
131 return EC;
132 }
133 }
134 return Error::success();
135}
136
139 for (const auto &B : Blocks) {
140 Size += sizeof(LineBlockFragmentHeader);
141 Size += B.Lines.size() * sizeof(LineNumberEntry);
142 if (hasColumnInfo())
143 Size += B.Columns.size() * sizeof(ColumnNumberEntry);
144 }
145 return Size;
146}
147
150 RelocOffset = Offset;
151 RelocSegment = Segment;
152}
153
155
156void DebugLinesSubsection::setFlags(LineFlags Flags) { this->Flags = Flags; }
157
159 return Flags & LF_HaveColumns;
160}
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
uint64_t Size
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
Provides read only access to a subclass of BinaryStream.
Error readObject(const T *&Dest)
Get a pointer to an object of type T from the underlying stream, as if by memcpy, and store the resul...
uint64_t bytesRemaining() const
Error readArray(ArrayRef< T > &Array, uint32_t NumElements)
Get a reference to a NumElements element array of objects of type T from the underlying stream as if ...
BinaryStreamRef is to BinaryStream what ArrayRef is to an Array.
Provides write only access to a subclass of WritableBinaryStream.
Error writeArray(ArrayRef< T > Array)
Writes an array of objects of type T to the underlying stream, as if by using memcpy.
Error writeObject(const T &Obj)
Writes the object Obj to the underlying stream, as if by using memcpy.
Lightweight error class with error context and mandatory checking.
Definition: Error.h:160
static ErrorSuccess success()
Create a success value.
Definition: Error.h:337
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
const Extractor & getExtractor() const
uint32_t mapChecksumOffset(StringRef FileName) const
Error initialize(BinaryStreamReader Reader)
void setRelocationAddress(uint16_t Segment, uint32_t Offset)
DebugLinesSubsection(DebugChecksumsSubsection &Checksums, DebugStringTableSubsection &Strings)
void addLineInfo(uint32_t Offset, const LineInfo &Line)
Error commit(BinaryStreamWriter &Writer) const override
void addLineAndColumnInfo(uint32_t Offset, const LineInfo &Line, uint32_t ColStart, uint32_t ColEnd)
uint32_t calculateSerializedSize() const override
Represents a read-write view of a CodeView string table.
Error operator()(BinaryStreamRef Stream, uint32_t &Len, LineColumnEntry &Item)
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ Offset
Definition: DWP.cpp:480
FixedStreamArray< ColumnNumberEntry > Columns
FixedStreamArray< LineNumberEntry > LineNumbers