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
|
//===- TpiStream.cpp - PDB Type Info (TPI) Stream 2 Access ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/PDB/Raw/TpiStream.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/TypeRecord.h"
#include "llvm/DebugInfo/PDB/Raw/MappedBlockStream.h"
#include "llvm/DebugInfo/PDB/Raw/RawConstants.h"
#include "llvm/DebugInfo/PDB/Raw/StreamReader.h"
#include "llvm/Support/Endian.h"
using namespace llvm;
using namespace llvm::support;
using namespace llvm::pdb;
namespace {
const uint32_t MinTypeIndex = codeview::TypeIndex::FirstNonSimpleIndex;
const uint32_t MinHashBuckets = 0x1000;
const uint32_t MaxHashBuckets = 0x40000;
}
static uint32_t HashBufferV8(uint8_t *buffer, uint32_t NumBuckets) {
// Not yet implemented, this is probably some variation of CRC32 but we need
// to be sure of the precise implementation otherwise we won't be able to work
// with persisted hash values.
return 0;
}
struct TpiStream::HeaderInfo {
struct EmbeddedBuf {
little32_t Off;
ulittle32_t Length;
};
ulittle32_t Version;
ulittle32_t HeaderSize;
ulittle32_t TypeIndexBegin;
ulittle32_t TypeIndexEnd;
ulittle32_t TypeRecordBytes;
ulittle16_t HashStreamIndex;
ulittle16_t HashAuxStreamIndex;
ulittle32_t HashKeySize;
ulittle32_t NumHashBuckets;
EmbeddedBuf HashValueBuffer;
EmbeddedBuf IndexOffsetBuffer;
EmbeddedBuf HashAdjBuffer;
};
TpiStream::TpiStream(PDBFile &File)
: Pdb(File), Stream(StreamTPI, File), HashFunction(nullptr) {}
TpiStream::~TpiStream() {}
std::error_code TpiStream::reload() {
StreamReader Reader(Stream);
if (Reader.bytesRemaining() < sizeof(HeaderInfo))
return std::make_error_code(std::errc::illegal_byte_sequence);
Header.reset(new HeaderInfo());
Reader.readObject(Header.get());
if (Header->Version != PdbTpiV80)
return std::make_error_code(std::errc::not_supported);
if (Header->HeaderSize != sizeof(HeaderInfo))
return std::make_error_code(std::errc::illegal_byte_sequence);
if (Header->HashKeySize != sizeof(ulittle32_t))
return std::make_error_code(std::errc::illegal_byte_sequence);
if (Header->NumHashBuckets < MinHashBuckets ||
Header->NumHashBuckets > MaxHashBuckets)
return std::make_error_code(std::errc::illegal_byte_sequence);
HashFunction = HashBufferV8;
// The actual type records themselves come from this stream
RecordsBuffer.initialize(Reader, Header->TypeRecordBytes);
// Hash indices, hash values, etc come from the hash stream.
MappedBlockStream HS(Header->HashStreamIndex, Pdb);
StreamReader HSR(HS);
HSR.setOffset(Header->HashValueBuffer.Off);
HashValuesBuffer.initialize(HSR, Header->HashValueBuffer.Length);
HSR.setOffset(Header->HashAdjBuffer.Off);
HashAdjBuffer.initialize(HSR, Header->HashAdjBuffer.Length);
HSR.setOffset(Header->IndexOffsetBuffer.Off);
TypeIndexOffsetBuffer.initialize(HSR, Header->IndexOffsetBuffer.Length);
return std::error_code();
}
PdbRaw_TpiVer TpiStream::getTpiVersion() const {
uint32_t Value = Header->Version;
return static_cast<PdbRaw_TpiVer>(Value);
}
uint32_t TpiStream::TypeIndexBegin() const { return Header->TypeIndexBegin; }
uint32_t TpiStream::TypeIndexEnd() const { return Header->TypeIndexEnd; }
uint32_t TpiStream::NumTypeRecords() const {
return TypeIndexEnd() - TypeIndexBegin();
}
iterator_range<codeview::TypeIterator> TpiStream::types() const {
return codeview::makeTypeRange(RecordsBuffer.str());
}
|
