|
121
|
1 //===- PDBFile.cpp - Low level interface to a PDB file ----------*- C++ -*-===//
|
|
|
2 //
|
|
|
3 // The LLVM Compiler Infrastructure
|
|
|
4 //
|
|
|
5 // This file is distributed under the University of Illinois Open Source
|
|
|
6 // License. See LICENSE.TXT for details.
|
|
|
7 //
|
|
|
8 //===----------------------------------------------------------------------===//
|
|
|
9
|
|
|
10 #include "llvm/DebugInfo/PDB/Native/PDBFile.h"
|
|
|
11 #include "llvm/ADT/ArrayRef.h"
|
|
|
12 #include "llvm/ADT/STLExtras.h"
|
|
|
13 #include "llvm/DebugInfo/MSF/MSFCommon.h"
|
|
|
14 #include "llvm/DebugInfo/MSF/MappedBlockStream.h"
|
|
|
15 #include "llvm/DebugInfo/PDB/Native/DbiStream.h"
|
|
|
16 #include "llvm/DebugInfo/PDB/Native/GlobalsStream.h"
|
|
|
17 #include "llvm/DebugInfo/PDB/Native/InfoStream.h"
|
|
|
18 #include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
|
|
|
19 #include "llvm/DebugInfo/PDB/Native/PublicsStream.h"
|
|
|
20 #include "llvm/DebugInfo/PDB/Native/RawError.h"
|
|
|
21 #include "llvm/DebugInfo/PDB/Native/SymbolStream.h"
|
|
|
22 #include "llvm/DebugInfo/PDB/Native/TpiStream.h"
|
|
|
23 #include "llvm/Support/BinaryStream.h"
|
|
|
24 #include "llvm/Support/BinaryStreamArray.h"
|
|
|
25 #include "llvm/Support/BinaryStreamReader.h"
|
|
|
26 #include "llvm/Support/Endian.h"
|
|
|
27 #include "llvm/Support/Error.h"
|
|
|
28 #include "llvm/Support/Path.h"
|
|
|
29 #include <algorithm>
|
|
|
30 #include <cassert>
|
|
|
31 #include <cstdint>
|
|
|
32
|
|
|
33 using namespace llvm;
|
|
|
34 using namespace llvm::codeview;
|
|
|
35 using namespace llvm::msf;
|
|
|
36 using namespace llvm::pdb;
|
|
|
37
|
|
|
38 namespace {
|
|
|
39 typedef FixedStreamArray<support::ulittle32_t> ulittle_array;
|
|
|
40 } // end anonymous namespace
|
|
|
41
|
|
|
42 PDBFile::PDBFile(StringRef Path, std::unique_ptr<BinaryStream> PdbFileBuffer,
|
|
|
43 BumpPtrAllocator &Allocator)
|
|
|
44 : FilePath(Path), Allocator(Allocator), Buffer(std::move(PdbFileBuffer)) {}
|
|
|
45
|
|
|
46 PDBFile::~PDBFile() = default;
|
|
|
47
|
|
|
48 StringRef PDBFile::getFilePath() const { return FilePath; }
|
|
|
49
|
|
|
50 StringRef PDBFile::getFileDirectory() const {
|
|
|
51 return sys::path::parent_path(FilePath);
|
|
|
52 }
|
|
|
53
|
|
|
54 uint32_t PDBFile::getBlockSize() const { return ContainerLayout.SB->BlockSize; }
|
|
|
55
|
|
|
56 uint32_t PDBFile::getFreeBlockMapBlock() const {
|
|
|
57 return ContainerLayout.SB->FreeBlockMapBlock;
|
|
|
58 }
|
|
|
59
|
|
|
60 uint32_t PDBFile::getBlockCount() const {
|
|
|
61 return ContainerLayout.SB->NumBlocks;
|
|
|
62 }
|
|
|
63
|
|
|
64 uint32_t PDBFile::getNumDirectoryBytes() const {
|
|
|
65 return ContainerLayout.SB->NumDirectoryBytes;
|
|
|
66 }
|
|
|
67
|
|
|
68 uint32_t PDBFile::getBlockMapIndex() const {
|
|
|
69 return ContainerLayout.SB->BlockMapAddr;
|
|
|
70 }
|
|
|
71
|
|
|
72 uint32_t PDBFile::getUnknown1() const { return ContainerLayout.SB->Unknown1; }
|
|
|
73
|
|
|
74 uint32_t PDBFile::getNumDirectoryBlocks() const {
|
|
|
75 return msf::bytesToBlocks(ContainerLayout.SB->NumDirectoryBytes,
|
|
|
76 ContainerLayout.SB->BlockSize);
|
|
|
77 }
|
|
|
78
|
|
|
79 uint64_t PDBFile::getBlockMapOffset() const {
|
|
|
80 return (uint64_t)ContainerLayout.SB->BlockMapAddr *
|
|
|
81 ContainerLayout.SB->BlockSize;
|
|
|
82 }
|
|
|
83
|
|
|
84 uint32_t PDBFile::getNumStreams() const {
|
|
|
85 return ContainerLayout.StreamSizes.size();
|
|
|
86 }
|
|
|
87
|
|
|
88 uint32_t PDBFile::getMaxStreamSize() const {
|
|
|
89 return *std::max_element(ContainerLayout.StreamSizes.begin(),
|
|
|
90 ContainerLayout.StreamSizes.end());
|
|
|
91 }
|
|
|
92
|
|
|
93 uint32_t PDBFile::getStreamByteSize(uint32_t StreamIndex) const {
|
|
|
94 return ContainerLayout.StreamSizes[StreamIndex];
|
|
|
95 }
|
|
|
96
|
|
|
97 ArrayRef<support::ulittle32_t>
|
|
|
98 PDBFile::getStreamBlockList(uint32_t StreamIndex) const {
|
|
|
99 return ContainerLayout.StreamMap[StreamIndex];
|
|
|
100 }
|
|
|
101
|
|
|
102 uint32_t PDBFile::getFileSize() const { return Buffer->getLength(); }
|
|
|
103
|
|
|
104 Expected<ArrayRef<uint8_t>> PDBFile::getBlockData(uint32_t BlockIndex,
|
|
|
105 uint32_t NumBytes) const {
|
|
|
106 uint64_t StreamBlockOffset = msf::blockToOffset(BlockIndex, getBlockSize());
|
|
|
107
|
|
|
108 ArrayRef<uint8_t> Result;
|
|
|
109 if (auto EC = Buffer->readBytes(StreamBlockOffset, NumBytes, Result))
|
|
|
110 return std::move(EC);
|
|
|
111 return Result;
|
|
|
112 }
|
|
|
113
|
|
|
114 Error PDBFile::setBlockData(uint32_t BlockIndex, uint32_t Offset,
|
|
|
115 ArrayRef<uint8_t> Data) const {
|
|
|
116 return make_error<RawError>(raw_error_code::not_writable,
|
|
|
117 "PDBFile is immutable");
|
|
|
118 }
|
|
|
119
|
|
|
120 Error PDBFile::parseFileHeaders() {
|
|
|
121 BinaryStreamReader Reader(*Buffer);
|
|
|
122
|
|
|
123 // Initialize SB.
|
|
|
124 const msf::SuperBlock *SB = nullptr;
|
|
|
125 if (auto EC = Reader.readObject(SB)) {
|
|
|
126 consumeError(std::move(EC));
|
|
|
127 return make_error<RawError>(raw_error_code::corrupt_file,
|
|
|
128 "Does not contain superblock");
|
|
|
129 }
|
|
|
130
|
|
|
131 if (auto EC = msf::validateSuperBlock(*SB))
|
|
|
132 return EC;
|
|
|
133
|
|
|
134 if (Buffer->getLength() % SB->BlockSize != 0)
|
|
|
135 return make_error<RawError>(raw_error_code::corrupt_file,
|
|
|
136 "File size is not a multiple of block size");
|
|
|
137 ContainerLayout.SB = SB;
|
|
|
138
|
|
|
139 // Initialize Free Page Map.
|
|
|
140 ContainerLayout.FreePageMap.resize(SB->NumBlocks);
|
|
|
141 // The Fpm exists either at block 1 or block 2 of the MSF. However, this
|
|
|
142 // allows for a maximum of getBlockSize() * 8 blocks bits in the Fpm, and
|
|
|
143 // thusly an equal number of total blocks in the file. For a block size
|
|
|
144 // of 4KiB (very common), this would yield 32KiB total blocks in file, for a
|
|
|
145 // maximum file size of 32KiB * 4KiB = 128MiB. Obviously this won't do, so
|
|
|
146 // the Fpm is split across the file at `getBlockSize()` intervals. As a
|
|
|
147 // result, every block whose index is of the form |{1,2} + getBlockSize() * k|
|
|
|
148 // for any non-negative integer k is an Fpm block. In theory, we only really
|
|
|
149 // need to reserve blocks of the form |{1,2} + getBlockSize() * 8 * k|, but
|
|
|
150 // current versions of the MSF format already expect the Fpm to be arranged
|
|
|
151 // at getBlockSize() intervals, so we have to be compatible.
|
|
|
152 // See the function fpmPn() for more information:
|
|
|
153 // https://github.com/Microsoft/microsoft-pdb/blob/master/PDB/msf/msf.cpp#L489
|
|
|
154 auto FpmStream =
|
|
|
155 MappedBlockStream::createFpmStream(ContainerLayout, *Buffer, Allocator);
|
|
|
156 BinaryStreamReader FpmReader(*FpmStream);
|
|
|
157 ArrayRef<uint8_t> FpmBytes;
|
|
|
158 if (auto EC = FpmReader.readBytes(FpmBytes, FpmReader.bytesRemaining()))
|
|
|
159 return EC;
|
|
|
160 uint32_t BlocksRemaining = getBlockCount();
|
|
|
161 uint32_t BI = 0;
|
|
|
162 for (auto Byte : FpmBytes) {
|
|
|
163 uint32_t BlocksThisByte = std::min(BlocksRemaining, 8U);
|
|
|
164 for (uint32_t I = 0; I < BlocksThisByte; ++I) {
|
|
|
165 if (Byte & (1 << I))
|
|
|
166 ContainerLayout.FreePageMap[BI] = true;
|
|
|
167 --BlocksRemaining;
|
|
|
168 ++BI;
|
|
|
169 }
|
|
|
170 }
|
|
|
171
|
|
|
172 Reader.setOffset(getBlockMapOffset());
|
|
|
173 if (auto EC = Reader.readArray(ContainerLayout.DirectoryBlocks,
|
|
|
174 getNumDirectoryBlocks()))
|
|
|
175 return EC;
|
|
|
176
|
|
|
177 return Error::success();
|
|
|
178 }
|
|
|
179
|
|
|
180 Error PDBFile::parseStreamData() {
|
|
|
181 assert(ContainerLayout.SB);
|
|
|
182 if (DirectoryStream)
|
|
|
183 return Error::success();
|
|
|
184
|
|
|
185 uint32_t NumStreams = 0;
|
|
|
186
|
|
|
187 // Normally you can't use a MappedBlockStream without having fully parsed the
|
|
|
188 // PDB file, because it accesses the directory and various other things, which
|
|
|
189 // is exactly what we are attempting to parse. By specifying a custom
|
|
|
190 // subclass of IPDBStreamData which only accesses the fields that have already
|
|
|
191 // been parsed, we can avoid this and reuse MappedBlockStream.
|
|
|
192 auto DS = MappedBlockStream::createDirectoryStream(ContainerLayout, *Buffer,
|
|
|
193 Allocator);
|
|
|
194 BinaryStreamReader Reader(*DS);
|
|
|
195 if (auto EC = Reader.readInteger(NumStreams))
|
|
|
196 return EC;
|
|
|
197
|
|
|
198 if (auto EC = Reader.readArray(ContainerLayout.StreamSizes, NumStreams))
|
|
|
199 return EC;
|
|
|
200 for (uint32_t I = 0; I < NumStreams; ++I) {
|
|
|
201 uint32_t StreamSize = getStreamByteSize(I);
|
|
|
202 // FIXME: What does StreamSize ~0U mean?
|
|
|
203 uint64_t NumExpectedStreamBlocks =
|
|
|
204 StreamSize == UINT32_MAX
|
|
|
205 ? 0
|
|
|
206 : msf::bytesToBlocks(StreamSize, ContainerLayout.SB->BlockSize);
|
|
|
207
|
|
|
208 // For convenience, we store the block array contiguously. This is because
|
|
|
209 // if someone calls setStreamMap(), it is more convenient to be able to call
|
|
|
210 // it with an ArrayRef instead of setting up a StreamRef. Since the
|
|
|
211 // DirectoryStream is cached in the class and thus lives for the life of the
|
|
|
212 // class, we can be guaranteed that readArray() will return a stable
|
|
|
213 // reference, even if it has to allocate from its internal pool.
|
|
|
214 ArrayRef<support::ulittle32_t> Blocks;
|
|
|
215 if (auto EC = Reader.readArray(Blocks, NumExpectedStreamBlocks))
|
|
|
216 return EC;
|
|
|
217 for (uint32_t Block : Blocks) {
|
|
|
218 uint64_t BlockEndOffset =
|
|
|
219 (uint64_t)(Block + 1) * ContainerLayout.SB->BlockSize;
|
|
|
220 if (BlockEndOffset > getFileSize())
|
|
|
221 return make_error<RawError>(raw_error_code::corrupt_file,
|
|
|
222 "Stream block map is corrupt.");
|
|
|
223 }
|
|
|
224 ContainerLayout.StreamMap.push_back(Blocks);
|
|
|
225 }
|
|
|
226
|
|
|
227 // We should have read exactly SB->NumDirectoryBytes bytes.
|
|
|
228 assert(Reader.bytesRemaining() == 0);
|
|
|
229 DirectoryStream = std::move(DS);
|
|
|
230 return Error::success();
|
|
|
231 }
|
|
|
232
|
|
|
233 ArrayRef<support::ulittle32_t> PDBFile::getDirectoryBlockArray() const {
|
|
|
234 return ContainerLayout.DirectoryBlocks;
|
|
|
235 }
|
|
|
236
|
|
|
237 std::unique_ptr<MappedBlockStream> PDBFile::createIndexedStream(uint16_t SN) {
|
|
|
238 if (SN == kInvalidStreamIndex)
|
|
|
239 return nullptr;
|
|
|
240 return MappedBlockStream::createIndexedStream(ContainerLayout, *Buffer, SN,
|
|
|
241 Allocator);
|
|
|
242 }
|
|
|
243
|
|
|
244 MSFStreamLayout PDBFile::getStreamLayout(uint32_t StreamIdx) const {
|
|
|
245 MSFStreamLayout Result;
|
|
|
246 auto Blocks = getStreamBlockList(StreamIdx);
|
|
|
247 Result.Blocks.assign(Blocks.begin(), Blocks.end());
|
|
|
248 Result.Length = getStreamByteSize(StreamIdx);
|
|
|
249 return Result;
|
|
|
250 }
|
|
|
251
|
|
|
252 msf::MSFStreamLayout PDBFile::getFpmStreamLayout() const {
|
|
|
253 return msf::getFpmStreamLayout(ContainerLayout);
|
|
|
254 }
|
|
|
255
|
|
|
256 Expected<GlobalsStream &> PDBFile::getPDBGlobalsStream() {
|
|
|
257 if (!Globals) {
|
|
|
258 auto DbiS = getPDBDbiStream();
|
|
|
259 if (!DbiS)
|
|
|
260 return DbiS.takeError();
|
|
|
261
|
|
|
262 auto GlobalS = safelyCreateIndexedStream(
|
|
|
263 ContainerLayout, *Buffer, DbiS->getGlobalSymbolStreamIndex());
|
|
|
264 if (!GlobalS)
|
|
|
265 return GlobalS.takeError();
|
|
|
266 auto TempGlobals = llvm::make_unique<GlobalsStream>(std::move(*GlobalS));
|
|
|
267 if (auto EC = TempGlobals->reload())
|
|
|
268 return std::move(EC);
|
|
|
269 Globals = std::move(TempGlobals);
|
|
|
270 }
|
|
|
271 return *Globals;
|
|
|
272 }
|
|
|
273
|
|
|
274 Expected<InfoStream &> PDBFile::getPDBInfoStream() {
|
|
|
275 if (!Info) {
|
|
|
276 auto InfoS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamPDB);
|
|
|
277 if (!InfoS)
|
|
|
278 return InfoS.takeError();
|
|
|
279 auto TempInfo = llvm::make_unique<InfoStream>(std::move(*InfoS));
|
|
|
280 if (auto EC = TempInfo->reload())
|
|
|
281 return std::move(EC);
|
|
|
282 Info = std::move(TempInfo);
|
|
|
283 }
|
|
|
284 return *Info;
|
|
|
285 }
|
|
|
286
|
|
|
287 Expected<DbiStream &> PDBFile::getPDBDbiStream() {
|
|
|
288 if (!Dbi) {
|
|
|
289 auto DbiS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamDBI);
|
|
|
290 if (!DbiS)
|
|
|
291 return DbiS.takeError();
|
|
|
292 auto TempDbi = llvm::make_unique<DbiStream>(*this, std::move(*DbiS));
|
|
|
293 if (auto EC = TempDbi->reload())
|
|
|
294 return std::move(EC);
|
|
|
295 Dbi = std::move(TempDbi);
|
|
|
296 }
|
|
|
297 return *Dbi;
|
|
|
298 }
|
|
|
299
|
|
|
300 Expected<TpiStream &> PDBFile::getPDBTpiStream() {
|
|
|
301 if (!Tpi) {
|
|
|
302 auto TpiS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamTPI);
|
|
|
303 if (!TpiS)
|
|
|
304 return TpiS.takeError();
|
|
|
305 auto TempTpi = llvm::make_unique<TpiStream>(*this, std::move(*TpiS));
|
|
|
306 if (auto EC = TempTpi->reload())
|
|
|
307 return std::move(EC);
|
|
|
308 Tpi = std::move(TempTpi);
|
|
|
309 }
|
|
|
310 return *Tpi;
|
|
|
311 }
|
|
|
312
|
|
|
313 Expected<TpiStream &> PDBFile::getPDBIpiStream() {
|
|
|
314 if (!Ipi) {
|
|
|
315 if (!hasPDBIpiStream())
|
|
|
316 return make_error<RawError>(raw_error_code::no_stream);
|
|
|
317
|
|
|
318 auto IpiS = safelyCreateIndexedStream(ContainerLayout, *Buffer, StreamIPI);
|
|
|
319 if (!IpiS)
|
|
|
320 return IpiS.takeError();
|
|
|
321 auto TempIpi = llvm::make_unique<TpiStream>(*this, std::move(*IpiS));
|
|
|
322 if (auto EC = TempIpi->reload())
|
|
|
323 return std::move(EC);
|
|
|
324 Ipi = std::move(TempIpi);
|
|
|
325 }
|
|
|
326 return *Ipi;
|
|
|
327 }
|
|
|
328
|
|
|
329 Expected<PublicsStream &> PDBFile::getPDBPublicsStream() {
|
|
|
330 if (!Publics) {
|
|
|
331 auto DbiS = getPDBDbiStream();
|
|
|
332 if (!DbiS)
|
|
|
333 return DbiS.takeError();
|
|
|
334
|
|
|
335 auto PublicS = safelyCreateIndexedStream(
|
|
|
336 ContainerLayout, *Buffer, DbiS->getPublicSymbolStreamIndex());
|
|
|
337 if (!PublicS)
|
|
|
338 return PublicS.takeError();
|
|
|
339 auto TempPublics = llvm::make_unique<PublicsStream>(std::move(*PublicS));
|
|
|
340 if (auto EC = TempPublics->reload())
|
|
|
341 return std::move(EC);
|
|
|
342 Publics = std::move(TempPublics);
|
|
|
343 }
|
|
|
344 return *Publics;
|
|
|
345 }
|
|
|
346
|
|
|
347 Expected<SymbolStream &> PDBFile::getPDBSymbolStream() {
|
|
|
348 if (!Symbols) {
|
|
|
349 auto DbiS = getPDBDbiStream();
|
|
|
350 if (!DbiS)
|
|
|
351 return DbiS.takeError();
|
|
|
352
|
|
|
353 uint32_t SymbolStreamNum = DbiS->getSymRecordStreamIndex();
|
|
|
354 auto SymbolS =
|
|
|
355 safelyCreateIndexedStream(ContainerLayout, *Buffer, SymbolStreamNum);
|
|
|
356 if (!SymbolS)
|
|
|
357 return SymbolS.takeError();
|
|
|
358
|
|
|
359 auto TempSymbols = llvm::make_unique<SymbolStream>(std::move(*SymbolS));
|
|
|
360 if (auto EC = TempSymbols->reload())
|
|
|
361 return std::move(EC);
|
|
|
362 Symbols = std::move(TempSymbols);
|
|
|
363 }
|
|
|
364 return *Symbols;
|
|
|
365 }
|
|
|
366
|
|
|
367 Expected<PDBStringTable &> PDBFile::getStringTable() {
|
|
|
368 if (!Strings) {
|
|
|
369 auto IS = getPDBInfoStream();
|
|
|
370 if (!IS)
|
|
|
371 return IS.takeError();
|
|
|
372
|
|
|
373 uint32_t NameStreamIndex = IS->getNamedStreamIndex("/names");
|
|
|
374
|
|
|
375 auto NS =
|
|
|
376 safelyCreateIndexedStream(ContainerLayout, *Buffer, NameStreamIndex);
|
|
|
377 if (!NS)
|
|
|
378 return NS.takeError();
|
|
|
379
|
|
|
380 auto N = llvm::make_unique<PDBStringTable>();
|
|
|
381 BinaryStreamReader Reader(**NS);
|
|
|
382 if (auto EC = N->reload(Reader))
|
|
|
383 return std::move(EC);
|
|
|
384 assert(Reader.bytesRemaining() == 0);
|
|
|
385 StringTableStream = std::move(*NS);
|
|
|
386 Strings = std::move(N);
|
|
|
387 }
|
|
|
388 return *Strings;
|
|
|
389 }
|
|
|
390
|
|
|
391 uint32_t PDBFile::getPointerSize() {
|
|
|
392 auto DbiS = getPDBDbiStream();
|
|
|
393 if (!DbiS)
|
|
|
394 return 0;
|
|
|
395 PDB_Machine Machine = DbiS->getMachineType();
|
|
|
396 if (Machine == PDB_Machine::Amd64)
|
|
|
397 return 8;
|
|
|
398 return 4;
|
|
|
399 }
|
|
|
400
|
|
|
401 bool PDBFile::hasPDBDbiStream() const { return StreamDBI < getNumStreams(); }
|
|
|
402
|
|
|
403 bool PDBFile::hasPDBGlobalsStream() {
|
|
|
404 auto DbiS = getPDBDbiStream();
|
|
|
405 if (!DbiS) {
|
|
|
406 consumeError(DbiS.takeError());
|
|
|
407 return false;
|
|
|
408 }
|
|
|
409
|
|
|
410 return DbiS->getGlobalSymbolStreamIndex() < getNumStreams();
|
|
|
411 }
|
|
|
412
|
|
|
413 bool PDBFile::hasPDBInfoStream() const { return StreamPDB < getNumStreams(); }
|
|
|
414
|
|
|
415 bool PDBFile::hasPDBIpiStream() const {
|
|
|
416 if (!hasPDBInfoStream())
|
|
|
417 return false;
|
|
|
418
|
|
|
419 if (StreamIPI >= getNumStreams())
|
|
|
420 return false;
|
|
|
421
|
|
|
422 auto &InfoStream = cantFail(const_cast<PDBFile *>(this)->getPDBInfoStream());
|
|
|
423 return InfoStream.containsIdStream();
|
|
|
424 }
|
|
|
425
|
|
|
426 bool PDBFile::hasPDBPublicsStream() {
|
|
|
427 auto DbiS = getPDBDbiStream();
|
|
|
428 if (!DbiS) {
|
|
|
429 consumeError(DbiS.takeError());
|
|
|
430 return false;
|
|
|
431 }
|
|
|
432 return DbiS->getPublicSymbolStreamIndex() < getNumStreams();
|
|
|
433 }
|
|
|
434
|
|
|
435 bool PDBFile::hasPDBSymbolStream() {
|
|
|
436 auto DbiS = getPDBDbiStream();
|
|
|
437 if (!DbiS)
|
|
|
438 return false;
|
|
|
439 return DbiS->getSymRecordStreamIndex() < getNumStreams();
|
|
|
440 }
|
|
|
441
|
|
|
442 bool PDBFile::hasPDBTpiStream() const { return StreamTPI < getNumStreams(); }
|
|
|
443
|
|
|
444 bool PDBFile::hasPDBStringTable() {
|
|
|
445 auto IS = getPDBInfoStream();
|
|
|
446 if (!IS)
|
|
|
447 return false;
|
|
|
448 return IS->getNamedStreamIndex("/names") < getNumStreams();
|
|
|
449 }
|
|
|
450
|
|
|
451 /// Wrapper around MappedBlockStream::createIndexedStream() that checks if a
|
|
|
452 /// stream with that index actually exists. If it does not, the return value
|
|
|
453 /// will have an MSFError with code msf_error_code::no_stream. Else, the return
|
|
|
454 /// value will contain the stream returned by createIndexedStream().
|
|
|
455 Expected<std::unique_ptr<MappedBlockStream>>
|
|
|
456 PDBFile::safelyCreateIndexedStream(const MSFLayout &Layout,
|
|
|
457 BinaryStreamRef MsfData,
|
|
|
458 uint32_t StreamIndex) const {
|
|
|
459 if (StreamIndex >= getNumStreams())
|
|
|
460 return make_error<RawError>(raw_error_code::no_stream);
|
|
|
461 return MappedBlockStream::createIndexedStream(Layout, MsfData, StreamIndex,
|
|
|
462 Allocator);
|
|
|
463 }
|
