1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
//===- DebugLinesSubsection.cpp -------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/CodeView/DebugLinesSubsection.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/CodeViewError.h"
#include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h"
#include "llvm/Support/BinaryStreamReader.h"
#include "llvm/Support/BinaryStreamWriter.h"
#include "llvm/Support/Error.h"
#include <cassert>
#include <cstdint>
using namespace llvm;
using namespace llvm::codeview;
Error LineColumnExtractor::operator()(BinaryStreamRef Stream, uint32_t &Len,
LineColumnEntry &Item) {
const LineBlockFragmentHeader *BlockHeader;
BinaryStreamReader Reader(Stream);
if (auto EC = Reader.readObject(BlockHeader))
return EC;
bool HasColumn = Header->Flags & uint16_t(LF_HaveColumns);
uint32_t LineInfoSize =
BlockHeader->NumLines *
(sizeof(LineNumberEntry) + (HasColumn ? sizeof(ColumnNumberEntry) : 0));
if (BlockHeader->BlockSize < sizeof(LineBlockFragmentHeader))
return make_error<CodeViewError>(cv_error_code::corrupt_record,
"Invalid line block record size");
uint32_t Size = BlockHeader->BlockSize - sizeof(LineBlockFragmentHeader);
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
// LineBlockFragmentHeader.
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();
}
DebugLinesSubsectionRef::DebugLinesSubsectionRef()
: DebugSubsectionRef(DebugSubsectionKind::Lines) {}
Error DebugLinesSubsectionRef::initialize(BinaryStreamReader Reader) {
if (auto EC = Reader.readObject(Header))
return EC;
LinesAndColumns.getExtractor().Header = Header;
if (auto EC = Reader.readArray(LinesAndColumns, Reader.bytesRemaining()))
return EC;
return Error::success();
}
bool DebugLinesSubsectionRef::hasColumnInfo() const {
return !!(Header->Flags & LF_HaveColumns);
}
DebugLinesSubsection::DebugLinesSubsection(DebugChecksumsSubsection &Checksums,
DebugStringTableSubsection &Strings)
: DebugSubsection(DebugSubsectionKind::Lines), Checksums(Checksums) {}
void DebugLinesSubsection::createBlock(StringRef FileName) {
uint32_t Offset = Checksums.mapChecksumOffset(FileName);
Blocks.emplace_back(Offset);
}
void DebugLinesSubsection::addLineInfo(uint32_t Offset, const LineInfo &Line) {
Block &B = Blocks.back();
LineNumberEntry LNE;
LNE.Flags = Line.getRawData();
LNE.Offset = Offset;
B.Lines.push_back(LNE);
}
void DebugLinesSubsection::addLineAndColumnInfo(uint32_t Offset,
const LineInfo &Line,
uint32_t ColStart,
uint32_t ColEnd) {
Block &B = Blocks.back();
assert(B.Lines.size() == B.Columns.size());
addLineInfo(Offset, Line);
ColumnNumberEntry CNE;
CNE.StartColumn = ColStart;
CNE.EndColumn = ColEnd;
B.Columns.push_back(CNE);
}
Error DebugLinesSubsection::commit(BinaryStreamWriter &Writer) const {
LineFragmentHeader Header;
Header.CodeSize = CodeSize;
Header.Flags = hasColumnInfo() ? LF_HaveColumns : 0;
Header.RelocOffset = RelocOffset;
Header.RelocSegment = RelocSegment;
if (auto EC = Writer.writeObject(Header))
return EC;
for (const auto &B : Blocks) {
LineBlockFragmentHeader BlockHeader;
assert(B.Lines.size() == B.Columns.size() || B.Columns.empty());
BlockHeader.NumLines = B.Lines.size();
BlockHeader.BlockSize = sizeof(LineBlockFragmentHeader);
BlockHeader.BlockSize += BlockHeader.NumLines * sizeof(LineNumberEntry);
if (hasColumnInfo())
BlockHeader.BlockSize += BlockHeader.NumLines * sizeof(ColumnNumberEntry);
BlockHeader.NameIndex = B.ChecksumBufferOffset;
if (auto EC = Writer.writeObject(BlockHeader))
return EC;
if (auto EC = Writer.writeArray(makeArrayRef(B.Lines)))
return EC;
if (hasColumnInfo()) {
if (auto EC = Writer.writeArray(makeArrayRef(B.Columns)))
return EC;
}
}
return Error::success();
}
uint32_t DebugLinesSubsection::calculateSerializedSize() const {
uint32_t Size = sizeof(LineFragmentHeader);
for (const auto &B : Blocks) {
Size += sizeof(LineBlockFragmentHeader);
Size += B.Lines.size() * sizeof(LineNumberEntry);
if (hasColumnInfo())
Size += B.Columns.size() * sizeof(ColumnNumberEntry);
}
return Size;
}
void DebugLinesSubsection::setRelocationAddress(uint16_t Segment,
uint32_t Offset) {
RelocOffset = Offset;
RelocSegment = Segment;
}
void DebugLinesSubsection::setCodeSize(uint32_t Size) { CodeSize = Size; }
void DebugLinesSubsection::setFlags(LineFlags Flags) { this->Flags = Flags; }
bool DebugLinesSubsection::hasColumnInfo() const {
return Flags & LF_HaveColumns;
}
|
