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1 | //===- DumpOutputStyle.cpp ------------------------------------ *- 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 "DumpOutputStyle.h" | |||
11 | ||||
12 | #include "FormatUtil.h" | |||
13 | #include "InputFile.h" | |||
14 | #include "MinimalSymbolDumper.h" | |||
15 | #include "MinimalTypeDumper.h" | |||
16 | #include "StreamUtil.h" | |||
17 | #include "llvm-pdbutil.h" | |||
18 | ||||
19 | #include "llvm/ADT/STLExtras.h" | |||
20 | #include "llvm/DebugInfo/CodeView/CVSymbolVisitor.h" | |||
21 | #include "llvm/DebugInfo/CodeView/CVTypeVisitor.h" | |||
22 | #include "llvm/DebugInfo/CodeView/DebugChecksumsSubsection.h" | |||
23 | #include "llvm/DebugInfo/CodeView/DebugCrossExSubsection.h" | |||
24 | #include "llvm/DebugInfo/CodeView/DebugCrossImpSubsection.h" | |||
25 | #include "llvm/DebugInfo/CodeView/DebugFrameDataSubsection.h" | |||
26 | #include "llvm/DebugInfo/CodeView/DebugInlineeLinesSubsection.h" | |||
27 | #include "llvm/DebugInfo/CodeView/DebugLinesSubsection.h" | |||
28 | #include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h" | |||
29 | #include "llvm/DebugInfo/CodeView/DebugSymbolsSubsection.h" | |||
30 | #include "llvm/DebugInfo/CodeView/Formatters.h" | |||
31 | #include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h" | |||
32 | #include "llvm/DebugInfo/CodeView/Line.h" | |||
33 | #include "llvm/DebugInfo/CodeView/SymbolDeserializer.h" | |||
34 | #include "llvm/DebugInfo/CodeView/SymbolVisitorCallbackPipeline.h" | |||
35 | #include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h" | |||
36 | #include "llvm/DebugInfo/CodeView/TypeHashing.h" | |||
37 | #include "llvm/DebugInfo/CodeView/TypeIndexDiscovery.h" | |||
38 | #include "llvm/DebugInfo/MSF/MappedBlockStream.h" | |||
39 | #include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h" | |||
40 | #include "llvm/DebugInfo/PDB/Native/DbiStream.h" | |||
41 | #include "llvm/DebugInfo/PDB/Native/GlobalsStream.h" | |||
42 | #include "llvm/DebugInfo/PDB/Native/ISectionContribVisitor.h" | |||
43 | #include "llvm/DebugInfo/PDB/Native/InfoStream.h" | |||
44 | #include "llvm/DebugInfo/PDB/Native/ModuleDebugStream.h" | |||
45 | #include "llvm/DebugInfo/PDB/Native/PDBFile.h" | |||
46 | #include "llvm/DebugInfo/PDB/Native/PublicsStream.h" | |||
47 | #include "llvm/DebugInfo/PDB/Native/RawError.h" | |||
48 | #include "llvm/DebugInfo/PDB/Native/SymbolStream.h" | |||
49 | #include "llvm/DebugInfo/PDB/Native/TpiHashing.h" | |||
50 | #include "llvm/DebugInfo/PDB/Native/TpiStream.h" | |||
51 | #include "llvm/Object/COFF.h" | |||
52 | #include "llvm/Support/BinaryStreamReader.h" | |||
53 | #include "llvm/Support/FormatAdapters.h" | |||
54 | #include "llvm/Support/FormatVariadic.h" | |||
55 | ||||
56 | #include <cctype> | |||
57 | ||||
58 | using namespace llvm; | |||
59 | using namespace llvm::codeview; | |||
60 | using namespace llvm::msf; | |||
61 | using namespace llvm::pdb; | |||
62 | ||||
63 | DumpOutputStyle::DumpOutputStyle(InputFile &File) | |||
64 | : File(File), P(2, false, outs()) {} | |||
65 | ||||
66 | PDBFile &DumpOutputStyle::getPdb() { return File.pdb(); } | |||
67 | object::COFFObjectFile &DumpOutputStyle::getObj() { return File.obj(); } | |||
68 | ||||
69 | void DumpOutputStyle::printStreamNotValidForObj() { | |||
70 | AutoIndent Indent(P, 4); | |||
71 | P.formatLine("Dumping this stream is not valid for object files"); | |||
72 | } | |||
73 | ||||
74 | void DumpOutputStyle::printStreamNotPresent(StringRef StreamName) { | |||
75 | AutoIndent Indent(P, 4); | |||
76 | P.formatLine("{0} stream not present", StreamName); | |||
77 | } | |||
78 | ||||
79 | Error DumpOutputStyle::dump() { | |||
80 | if (opts::dump::DumpSummary) { | |||
81 | if (auto EC = dumpFileSummary()) | |||
82 | return EC; | |||
83 | P.NewLine(); | |||
84 | } | |||
85 | ||||
86 | if (opts::dump::DumpStreams) { | |||
87 | if (auto EC = dumpStreamSummary()) | |||
88 | return EC; | |||
89 | P.NewLine(); | |||
90 | } | |||
91 | ||||
92 | if (opts::dump::DumpSymbolStats) { | |||
93 | if (auto EC = dumpSymbolStats()) | |||
94 | return EC; | |||
95 | P.NewLine(); | |||
96 | } | |||
97 | ||||
98 | if (opts::dump::DumpUdtStats) { | |||
99 | if (auto EC = dumpUdtStats()) | |||
100 | return EC; | |||
101 | P.NewLine(); | |||
102 | } | |||
103 | ||||
104 | if (opts::dump::DumpNamedStreams) { | |||
105 | if (auto EC = dumpNamedStreams()) | |||
106 | return EC; | |||
107 | P.NewLine(); | |||
108 | } | |||
109 | ||||
110 | if (opts::dump::DumpStringTable || opts::dump::DumpStringTableDetails) { | |||
111 | if (auto EC = dumpStringTable()) | |||
112 | return EC; | |||
113 | P.NewLine(); | |||
114 | } | |||
115 | ||||
116 | if (opts::dump::DumpModules) { | |||
117 | if (auto EC = dumpModules()) | |||
118 | return EC; | |||
119 | } | |||
120 | ||||
121 | if (opts::dump::DumpModuleFiles) { | |||
122 | if (auto EC = dumpModuleFiles()) | |||
123 | return EC; | |||
124 | } | |||
125 | ||||
126 | if (opts::dump::DumpLines) { | |||
127 | if (auto EC = dumpLines()) | |||
128 | return EC; | |||
129 | } | |||
130 | ||||
131 | if (opts::dump::DumpInlineeLines) { | |||
132 | if (auto EC = dumpInlineeLines()) | |||
133 | return EC; | |||
134 | } | |||
135 | ||||
136 | if (opts::dump::DumpXmi) { | |||
137 | if (auto EC = dumpXmi()) | |||
138 | return EC; | |||
139 | } | |||
140 | ||||
141 | if (opts::dump::DumpXme) { | |||
142 | if (auto EC = dumpXme()) | |||
143 | return EC; | |||
144 | } | |||
145 | ||||
146 | if (opts::dump::DumpFpo) { | |||
147 | if (auto EC = dumpFpo()) | |||
148 | return EC; | |||
149 | } | |||
150 | ||||
151 | if (File.isObj()) { | |||
152 | if (opts::dump::DumpTypes || !opts::dump::DumpTypeIndex.empty() || | |||
153 | opts::dump::DumpTypeExtras) | |||
154 | if (auto EC = dumpTypesFromObjectFile()) | |||
155 | return EC; | |||
156 | } else { | |||
157 | if (opts::dump::DumpTypes || !opts::dump::DumpTypeIndex.empty() || | |||
158 | opts::dump::DumpTypeExtras) { | |||
159 | if (auto EC = dumpTpiStream(StreamTPI)) | |||
160 | return EC; | |||
161 | } | |||
162 | ||||
163 | if (opts::dump::DumpIds || !opts::dump::DumpIdIndex.empty() || | |||
164 | opts::dump::DumpIdExtras) { | |||
165 | if (auto EC = dumpTpiStream(StreamIPI)) | |||
166 | return EC; | |||
167 | } | |||
168 | } | |||
169 | ||||
170 | if (opts::dump::DumpGSIRecords) { | |||
171 | if (auto EC = dumpGSIRecords()) | |||
172 | return EC; | |||
173 | } | |||
174 | ||||
175 | if (opts::dump::DumpGlobals) { | |||
176 | if (auto EC = dumpGlobals()) | |||
177 | return EC; | |||
178 | } | |||
179 | ||||
180 | if (opts::dump::DumpPublics) { | |||
181 | if (auto EC = dumpPublics()) | |||
182 | return EC; | |||
183 | } | |||
184 | ||||
185 | if (opts::dump::DumpSymbols) { | |||
186 | auto EC = File.isPdb() ? dumpModuleSymsForPdb() : dumpModuleSymsForObj(); | |||
187 | if (EC) | |||
188 | return EC; | |||
189 | } | |||
190 | ||||
191 | if (opts::dump::DumpSectionHeaders) { | |||
192 | if (auto EC = dumpSectionHeaders()) | |||
193 | return EC; | |||
194 | } | |||
195 | ||||
196 | if (opts::dump::DumpSectionContribs) { | |||
197 | if (auto EC = dumpSectionContribs()) | |||
198 | return EC; | |||
199 | } | |||
200 | ||||
201 | if (opts::dump::DumpSectionMap) { | |||
202 | if (auto EC = dumpSectionMap()) | |||
203 | return EC; | |||
204 | } | |||
205 | ||||
206 | return Error::success(); | |||
207 | } | |||
208 | ||||
209 | static void printHeader(LinePrinter &P, const Twine &S) { | |||
210 | P.NewLine(); | |||
211 | P.formatLine("{0,=60}", S); | |||
212 | P.formatLine("{0}", fmt_repeat('=', 60)); | |||
213 | } | |||
214 | ||||
215 | Error DumpOutputStyle::dumpFileSummary() { | |||
216 | printHeader(P, "Summary"); | |||
217 | ||||
218 | if (File.isObj()) { | |||
219 | printStreamNotValidForObj(); | |||
220 | return Error::success(); | |||
221 | } | |||
222 | ||||
223 | AutoIndent Indent(P); | |||
224 | ExitOnError Err("Invalid PDB Format: "); | |||
225 | ||||
226 | P.formatLine("Block Size: {0}", getPdb().getBlockSize()); | |||
227 | P.formatLine("Number of blocks: {0}", getPdb().getBlockCount()); | |||
228 | P.formatLine("Number of streams: {0}", getPdb().getNumStreams()); | |||
229 | ||||
230 | auto &PS = Err(getPdb().getPDBInfoStream()); | |||
231 | P.formatLine("Signature: {0}", PS.getSignature()); | |||
232 | P.formatLine("Age: {0}", PS.getAge()); | |||
233 | P.formatLine("GUID: {0}", fmt_guid(PS.getGuid().Guid)); | |||
234 | P.formatLine("Features: {0:x+}", static_cast<uint32_t>(PS.getFeatures())); | |||
235 | P.formatLine("Has Debug Info: {0}", getPdb().hasPDBDbiStream()); | |||
236 | P.formatLine("Has Types: {0}", getPdb().hasPDBTpiStream()); | |||
237 | P.formatLine("Has IDs: {0}", getPdb().hasPDBIpiStream()); | |||
238 | P.formatLine("Has Globals: {0}", getPdb().hasPDBGlobalsStream()); | |||
239 | P.formatLine("Has Publics: {0}", getPdb().hasPDBPublicsStream()); | |||
240 | if (getPdb().hasPDBDbiStream()) { | |||
241 | auto &DBI = Err(getPdb().getPDBDbiStream()); | |||
242 | P.formatLine("Is incrementally linked: {0}", DBI.isIncrementallyLinked()); | |||
243 | P.formatLine("Has conflicting types: {0}", DBI.hasCTypes()); | |||
244 | P.formatLine("Is stripped: {0}", DBI.isStripped()); | |||
245 | } | |||
246 | ||||
247 | return Error::success(); | |||
248 | } | |||
249 | ||||
250 | static StatCollection getSymbolStats(const SymbolGroup &SG, | |||
251 | StatCollection &CumulativeStats) { | |||
252 | StatCollection Stats; | |||
253 | if (SG.getFile().isPdb()) { | |||
254 | // For PDB files, all symbols are packed into one stream. | |||
255 | for (const auto &S : SG.getPdbModuleStream().symbols(nullptr)) { | |||
256 | Stats.update(S.kind(), S.length()); | |||
257 | CumulativeStats.update(S.kind(), S.length()); | |||
258 | } | |||
259 | return Stats; | |||
260 | } | |||
261 | ||||
262 | for (const auto &SS : SG.getDebugSubsections()) { | |||
263 | // For object files, all symbols are spread across multiple Symbol | |||
264 | // subsections of a given .debug$S section. | |||
265 | if (SS.kind() != DebugSubsectionKind::Symbols) | |||
266 | continue; | |||
267 | DebugSymbolsSubsectionRef Symbols; | |||
268 | BinaryStreamReader Reader(SS.getRecordData()); | |||
269 | cantFail(Symbols.initialize(Reader)); | |||
270 | for (const auto &S : Symbols) { | |||
271 | Stats.update(S.kind(), S.length()); | |||
272 | CumulativeStats.update(S.kind(), S.length()); | |||
273 | } | |||
274 | } | |||
275 | return Stats; | |||
276 | } | |||
277 | ||||
278 | static StatCollection getChunkStats(const SymbolGroup &SG, | |||
279 | StatCollection &CumulativeStats) { | |||
280 | StatCollection Stats; | |||
281 | for (const auto &Chunk : SG.getDebugSubsections()) { | |||
282 | Stats.update(uint32_t(Chunk.kind()), Chunk.getRecordLength()); | |||
283 | CumulativeStats.update(uint32_t(Chunk.kind()), Chunk.getRecordLength()); | |||
284 | } | |||
285 | return Stats; | |||
286 | } | |||
287 | ||||
288 | static inline std::string formatModuleDetailKind(DebugSubsectionKind K) { | |||
289 | return formatChunkKind(K, false); | |||
290 | } | |||
291 | ||||
292 | static inline std::string formatModuleDetailKind(SymbolKind K) { | |||
293 | return formatSymbolKind(K); | |||
294 | } | |||
295 | ||||
296 | template <typename Kind> | |||
297 | static void printModuleDetailStats(LinePrinter &P, StringRef Label, | |||
298 | const StatCollection &Stats) { | |||
299 | P.NewLine(); | |||
300 | P.formatLine(" {0}", Label); | |||
301 | AutoIndent Indent(P); | |||
302 | P.formatLine("{0,40}: {1,7} entries ({2,8} bytes)", "Total", | |||
303 | Stats.Totals.Count, Stats.Totals.Size); | |||
304 | P.formatLine("{0}", fmt_repeat('-', 74)); | |||
305 | for (const auto &K : Stats.Individual) { | |||
306 | std::string KindName = formatModuleDetailKind(Kind(K.first)); | |||
307 | P.formatLine("{0,40}: {1,7} entries ({2,8} bytes)", KindName, | |||
308 | K.second.Count, K.second.Size); | |||
309 | } | |||
310 | } | |||
311 | ||||
312 | static bool isMyCode(const SymbolGroup &Group) { | |||
313 | if (Group.getFile().isObj()) | |||
314 | return true; | |||
315 | ||||
316 | StringRef Name = Group.name(); | |||
317 | if (Name.startswith("Import:")) | |||
318 | return false; | |||
319 | if (Name.endswith_lower(".dll")) | |||
320 | return false; | |||
321 | if (Name.equals_lower("* linker *")) | |||
322 | return false; | |||
323 | if (Name.startswith_lower("f:\\binaries\\Intermediate\\vctools")) | |||
324 | return false; | |||
325 | if (Name.startswith_lower("f:\\dd\\vctools\\crt")) | |||
326 | return false; | |||
327 | return true; | |||
328 | } | |||
329 | ||||
330 | static bool shouldDumpSymbolGroup(uint32_t Idx, const SymbolGroup &Group) { | |||
331 | if (opts::dump::JustMyCode && !isMyCode(Group)) | |||
332 | return false; | |||
333 | ||||
334 | // If the arg was not specified on the command line, always dump all modules. | |||
335 | if (opts::dump::DumpModi.getNumOccurrences() == 0) | |||
336 | return true; | |||
337 | ||||
338 | // Otherwise, only dump if this is the same module specified. | |||
339 | return (opts::dump::DumpModi == Idx); | |||
340 | } | |||
341 | ||||
342 | Error DumpOutputStyle::dumpStreamSummary() { | |||
343 | printHeader(P, "Streams"); | |||
344 | ||||
345 | if (File.isObj()) { | |||
346 | printStreamNotValidForObj(); | |||
347 | return Error::success(); | |||
348 | } | |||
349 | ||||
350 | AutoIndent Indent(P); | |||
351 | ||||
352 | if (StreamPurposes.empty()) | |||
353 | discoverStreamPurposes(getPdb(), StreamPurposes); | |||
354 | ||||
355 | uint32_t StreamCount = getPdb().getNumStreams(); | |||
356 | uint32_t MaxStreamSize = getPdb().getMaxStreamSize(); | |||
357 | ||||
358 | for (uint16_t StreamIdx = 0; StreamIdx < StreamCount; ++StreamIdx) { | |||
359 | P.formatLine( | |||
360 | "Stream {0} ({1} bytes): [{2}]", | |||
361 | fmt_align(StreamIdx, AlignStyle::Right, NumDigits(StreamCount)), | |||
362 | fmt_align(getPdb().getStreamByteSize(StreamIdx), AlignStyle::Right, | |||
363 | NumDigits(MaxStreamSize)), | |||
364 | StreamPurposes[StreamIdx].getLongName()); | |||
365 | ||||
366 | if (opts::dump::DumpStreamBlocks) { | |||
367 | auto Blocks = getPdb().getStreamBlockList(StreamIdx); | |||
368 | std::vector<uint32_t> BV(Blocks.begin(), Blocks.end()); | |||
369 | P.formatLine(" {0} Blocks: [{1}]", | |||
370 | fmt_repeat(' ', NumDigits(StreamCount)), | |||
371 | make_range(BV.begin(), BV.end())); | |||
372 | } | |||
373 | } | |||
374 | ||||
375 | return Error::success(); | |||
376 | } | |||
377 | ||||
378 | static Expected<ModuleDebugStreamRef> getModuleDebugStream(PDBFile &File, | |||
379 | uint32_t Index) { | |||
380 | ExitOnError Err("Unexpected error: "); | |||
381 | ||||
382 | auto &Dbi = Err(File.getPDBDbiStream()); | |||
383 | const auto &Modules = Dbi.modules(); | |||
384 | auto Modi = Modules.getModuleDescriptor(Index); | |||
385 | ||||
386 | uint16_t ModiStream = Modi.getModuleStreamIndex(); | |||
387 | if (ModiStream == kInvalidStreamIndex) | |||
388 | return make_error<RawError>(raw_error_code::no_stream, | |||
389 | "Module stream not present"); | |||
390 | ||||
391 | auto ModStreamData = File.createIndexedStream(ModiStream); | |||
392 | ||||
393 | ModuleDebugStreamRef ModS(Modi, std::move(ModStreamData)); | |||
394 | if (auto EC = ModS.reload()) | |||
395 | return make_error<RawError>(raw_error_code::corrupt_file, | |||
396 | "Invalid module stream"); | |||
397 | ||||
398 | return std::move(ModS); | |||
399 | } | |||
400 | ||||
401 | template <typename CallbackT> | |||
402 | static void | |||
403 | iterateOneModule(InputFile &File, const Optional<PrintScope> &HeaderScope, | |||
404 | const SymbolGroup &SG, uint32_t Modi, CallbackT Callback) { | |||
405 | if (HeaderScope) { | |||
406 | HeaderScope->P.formatLine( | |||
407 | "Mod {0:4} | `{1}`: ", | |||
408 | fmt_align(Modi, AlignStyle::Right, HeaderScope->LabelWidth), SG.name()); | |||
409 | } | |||
410 | ||||
411 | AutoIndent Indent(HeaderScope); | |||
412 | Callback(Modi, SG); | |||
413 | } | |||
414 | ||||
415 | template <typename CallbackT> | |||
416 | static void iterateSymbolGroups(InputFile &Input, | |||
417 | const Optional<PrintScope> &HeaderScope, | |||
418 | CallbackT Callback) { | |||
419 | AutoIndent Indent(HeaderScope); | |||
420 | ||||
421 | ExitOnError Err("Unexpected error processing modules: "); | |||
422 | ||||
423 | if (opts::dump::DumpModi.getNumOccurrences() > 0) { | |||
424 | assert(opts::dump::DumpModi.getNumOccurrences() == 1)((opts::dump::DumpModi.getNumOccurrences() == 1) ? static_cast <void> (0) : __assert_fail ("opts::dump::DumpModi.getNumOccurrences() == 1" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/llvm-pdbutil/DumpOutputStyle.cpp" , 424, __PRETTY_FUNCTION__)); | |||
425 | uint32_t Modi = opts::dump::DumpModi; | |||
426 | SymbolGroup SG(&Input, Modi); | |||
427 | iterateOneModule(Input, withLabelWidth(HeaderScope, NumDigits(Modi)), SG, | |||
428 | Modi, Callback); | |||
429 | return; | |||
430 | } | |||
431 | ||||
432 | uint32_t I = 0; | |||
433 | ||||
434 | for (const auto &SG : Input.symbol_groups()) { | |||
435 | if (shouldDumpSymbolGroup(I, SG)) | |||
436 | iterateOneModule(Input, withLabelWidth(HeaderScope, NumDigits(I)), SG, I, | |||
437 | Callback); | |||
438 | ||||
439 | ++I; | |||
440 | } | |||
441 | } | |||
442 | ||||
443 | template <typename SubsectionT> | |||
444 | static void iterateModuleSubsections( | |||
445 | InputFile &File, const Optional<PrintScope> &HeaderScope, | |||
446 | llvm::function_ref<void(uint32_t, const SymbolGroup &, SubsectionT &)> | |||
447 | Callback) { | |||
448 | ||||
449 | iterateSymbolGroups(File, HeaderScope, | |||
450 | [&](uint32_t Modi, const SymbolGroup &SG) { | |||
451 | for (const auto &SS : SG.getDebugSubsections()) { | |||
452 | SubsectionT Subsection; | |||
453 | ||||
454 | if (SS.kind() != Subsection.kind()) | |||
455 | continue; | |||
456 | ||||
457 | BinaryStreamReader Reader(SS.getRecordData()); | |||
458 | if (auto EC = Subsection.initialize(Reader)) | |||
459 | continue; | |||
460 | Callback(Modi, SG, Subsection); | |||
461 | } | |||
462 | }); | |||
463 | } | |||
464 | ||||
465 | static Expected<std::pair<std::unique_ptr<MappedBlockStream>, | |||
466 | ArrayRef<llvm::object::coff_section>>> | |||
467 | loadSectionHeaders(PDBFile &File, DbgHeaderType Type) { | |||
468 | if (!File.hasPDBDbiStream()) | |||
469 | return make_error<StringError>( | |||
470 | "Section headers require a DBI Stream, which could not be loaded", | |||
471 | inconvertibleErrorCode()); | |||
472 | ||||
473 | auto &Dbi = cantFail(File.getPDBDbiStream()); | |||
474 | uint32_t SI = Dbi.getDebugStreamIndex(Type); | |||
475 | ||||
476 | if (SI == kInvalidStreamIndex) | |||
477 | return make_error<StringError>( | |||
478 | "PDB does not contain the requested image section header type", | |||
479 | inconvertibleErrorCode()); | |||
480 | ||||
481 | auto Stream = File.createIndexedStream(SI); | |||
482 | if (!Stream) | |||
483 | return make_error<StringError>("Could not load the required stream data", | |||
484 | inconvertibleErrorCode()); | |||
485 | ||||
486 | ArrayRef<object::coff_section> Headers; | |||
487 | if (Stream->getLength() % sizeof(object::coff_section) != 0) | |||
488 | return make_error<StringError>( | |||
489 | "Section header array size is not a multiple of section header size", | |||
490 | inconvertibleErrorCode()); | |||
491 | ||||
492 | uint32_t NumHeaders = Stream->getLength() / sizeof(object::coff_section); | |||
493 | BinaryStreamReader Reader(*Stream); | |||
494 | cantFail(Reader.readArray(Headers, NumHeaders)); | |||
495 | return std::make_pair(std::move(Stream), Headers); | |||
496 | } | |||
497 | ||||
498 | static std::vector<std::string> getSectionNames(PDBFile &File) { | |||
499 | auto ExpectedHeaders = loadSectionHeaders(File, DbgHeaderType::SectionHdr); | |||
500 | if (!ExpectedHeaders) | |||
501 | return {}; | |||
502 | ||||
503 | std::unique_ptr<MappedBlockStream> Stream; | |||
504 | ArrayRef<object::coff_section> Headers; | |||
505 | std::tie(Stream, Headers) = std::move(*ExpectedHeaders); | |||
506 | std::vector<std::string> Names; | |||
507 | for (const auto &H : Headers) | |||
508 | Names.push_back(H.Name); | |||
509 | return Names; | |||
510 | } | |||
511 | ||||
512 | static void dumpSectionContrib(LinePrinter &P, const SectionContrib &SC, | |||
513 | ArrayRef<std::string> SectionNames, | |||
514 | uint32_t FieldWidth) { | |||
515 | std::string NameInsert; | |||
516 | if (SC.ISect > 0 && SC.ISect <= SectionNames.size()) { | |||
517 | StringRef SectionName = SectionNames[SC.ISect - 1]; | |||
518 | NameInsert = formatv("[{0}]", SectionName).str(); | |||
519 | } else | |||
520 | NameInsert = "[???]"; | |||
521 | P.formatLine("SC{5} | mod = {2}, {0}, size = {1}, data crc = {3}, reloc " | |||
522 | "crc = {4}", | |||
523 | formatSegmentOffset(SC.ISect, SC.Off), fmtle(SC.Size), | |||
524 | fmtle(SC.Imod), fmtle(SC.DataCrc), fmtle(SC.RelocCrc), | |||
525 | fmt_align(NameInsert, AlignStyle::Left, FieldWidth + 2)); | |||
526 | AutoIndent Indent(P, FieldWidth + 2); | |||
527 | P.formatLine(" {0}", | |||
528 | formatSectionCharacteristics(P.getIndentLevel() + 6, | |||
529 | SC.Characteristics, 3, " | ")); | |||
530 | } | |||
531 | ||||
532 | static void dumpSectionContrib(LinePrinter &P, const SectionContrib2 &SC, | |||
533 | ArrayRef<std::string> SectionNames, | |||
534 | uint32_t FieldWidth) { | |||
535 | P.formatLine("SC2[{6}] | mod = {2}, {0}, size = {1}, data crc = {3}, reloc " | |||
536 | "crc = {4}, coff section = {5}", | |||
537 | formatSegmentOffset(SC.Base.ISect, SC.Base.Off), | |||
538 | fmtle(SC.Base.Size), fmtle(SC.Base.Imod), fmtle(SC.Base.DataCrc), | |||
539 | fmtle(SC.Base.RelocCrc), fmtle(SC.ISectCoff)); | |||
540 | P.formatLine(" {0}", | |||
541 | formatSectionCharacteristics(P.getIndentLevel() + 6, | |||
542 | SC.Base.Characteristics, 3, " | ")); | |||
543 | } | |||
544 | ||||
545 | Error DumpOutputStyle::dumpModules() { | |||
546 | printHeader(P, "Modules"); | |||
547 | ||||
548 | if (File.isObj()) { | |||
549 | printStreamNotValidForObj(); | |||
550 | return Error::success(); | |||
551 | } | |||
552 | ||||
553 | if (!getPdb().hasPDBDbiStream()) { | |||
554 | printStreamNotPresent("DBI"); | |||
555 | return Error::success(); | |||
556 | } | |||
557 | ||||
558 | AutoIndent Indent(P); | |||
559 | ExitOnError Err("Unexpected error processing modules: "); | |||
560 | ||||
561 | auto &Stream = Err(getPdb().getPDBDbiStream()); | |||
562 | ||||
563 | const DbiModuleList &Modules = Stream.modules(); | |||
564 | iterateSymbolGroups( | |||
565 | File, PrintScope{P, 11}, [&](uint32_t Modi, const SymbolGroup &Strings) { | |||
566 | auto Desc = Modules.getModuleDescriptor(Modi); | |||
567 | if (opts::dump::DumpSectionContribs) { | |||
568 | std::vector<std::string> Sections = getSectionNames(getPdb()); | |||
569 | dumpSectionContrib(P, Desc.getSectionContrib(), Sections, 0); | |||
570 | } | |||
571 | P.formatLine("Obj: `{0}`: ", Desc.getObjFileName()); | |||
572 | P.formatLine("debug stream: {0}, # files: {1}, has ec info: {2}", | |||
573 | Desc.getModuleStreamIndex(), Desc.getNumberOfFiles(), | |||
574 | Desc.hasECInfo()); | |||
575 | StringRef PdbFilePath = | |||
576 | Err(Stream.getECName(Desc.getPdbFilePathNameIndex())); | |||
577 | StringRef SrcFilePath = | |||
578 | Err(Stream.getECName(Desc.getSourceFileNameIndex())); | |||
579 | P.formatLine("pdb file ni: {0} `{1}`, src file ni: {2} `{3}`", | |||
580 | Desc.getPdbFilePathNameIndex(), PdbFilePath, | |||
581 | Desc.getSourceFileNameIndex(), SrcFilePath); | |||
582 | }); | |||
583 | return Error::success(); | |||
584 | } | |||
585 | ||||
586 | Error DumpOutputStyle::dumpModuleFiles() { | |||
587 | printHeader(P, "Files"); | |||
588 | ||||
589 | if (File.isObj()) { | |||
590 | printStreamNotValidForObj(); | |||
591 | return Error::success(); | |||
592 | } | |||
593 | ||||
594 | if (!getPdb().hasPDBDbiStream()) { | |||
595 | printStreamNotPresent("DBI"); | |||
596 | return Error::success(); | |||
597 | } | |||
598 | ||||
599 | ExitOnError Err("Unexpected error processing modules: "); | |||
600 | ||||
601 | iterateSymbolGroups(File, PrintScope{P, 11}, | |||
602 | [this, &Err](uint32_t Modi, const SymbolGroup &Strings) { | |||
603 | auto &Stream = Err(getPdb().getPDBDbiStream()); | |||
604 | ||||
605 | const DbiModuleList &Modules = Stream.modules(); | |||
606 | for (const auto &F : Modules.source_files(Modi)) { | |||
607 | Strings.formatFromFileName(P, F); | |||
608 | } | |||
609 | }); | |||
610 | return Error::success(); | |||
611 | } | |||
612 | ||||
613 | Error DumpOutputStyle::dumpSymbolStats() { | |||
614 | printHeader(P, "Module Stats"); | |||
615 | ||||
616 | if (File.isPdb() && !getPdb().hasPDBDbiStream()) { | |||
617 | printStreamNotPresent("DBI"); | |||
618 | return Error::success(); | |||
619 | } | |||
620 | ||||
621 | ExitOnError Err("Unexpected error processing modules: "); | |||
622 | ||||
623 | StatCollection SymStats; | |||
624 | StatCollection ChunkStats; | |||
625 | ||||
626 | Optional<PrintScope> Scope; | |||
627 | if (File.isPdb()) | |||
628 | Scope.emplace(P, 2); | |||
629 | ||||
630 | iterateSymbolGroups(File, Scope, [&](uint32_t Modi, const SymbolGroup &SG) { | |||
631 | StatCollection SS = getSymbolStats(SG, SymStats); | |||
632 | StatCollection CS = getChunkStats(SG, ChunkStats); | |||
633 | ||||
634 | if (SG.getFile().isPdb()) { | |||
635 | AutoIndent Indent(P); | |||
636 | auto Modules = cantFail(File.pdb().getPDBDbiStream()).modules(); | |||
637 | uint32_t ModCount = Modules.getModuleCount(); | |||
638 | DbiModuleDescriptor Desc = Modules.getModuleDescriptor(Modi); | |||
639 | uint32_t StreamIdx = Desc.getModuleStreamIndex(); | |||
640 | ||||
641 | if (StreamIdx == kInvalidStreamIndex) { | |||
642 | P.formatLine("Mod {0} (debug info not present): [{1}]", | |||
643 | fmt_align(Modi, AlignStyle::Right, NumDigits(ModCount)), | |||
644 | Desc.getModuleName()); | |||
645 | return; | |||
646 | } | |||
647 | P.formatLine("Stream {0}, {1} bytes", StreamIdx, | |||
648 | getPdb().getStreamByteSize(StreamIdx)); | |||
649 | ||||
650 | printModuleDetailStats<SymbolKind>(P, "Symbols", SS); | |||
651 | printModuleDetailStats<DebugSubsectionKind>(P, "Chunks", CS); | |||
652 | } | |||
653 | }); | |||
654 | ||||
655 | if (SymStats.Totals.Count > 0) { | |||
656 | P.printLine(" Summary |"); | |||
657 | AutoIndent Indent(P, 4); | |||
658 | printModuleDetailStats<SymbolKind>(P, "Symbols", SymStats); | |||
659 | printModuleDetailStats<DebugSubsectionKind>(P, "Chunks", ChunkStats); | |||
660 | } | |||
661 | ||||
662 | return Error::success(); | |||
663 | } | |||
664 | ||||
665 | static bool isValidNamespaceIdentifier(StringRef S) { | |||
666 | if (S.empty()) | |||
667 | return false; | |||
668 | ||||
669 | if (std::isdigit(S[0])) | |||
670 | return false; | |||
671 | ||||
672 | return llvm::all_of(S, [](char C) { return std::isalnum(C); }); | |||
673 | } | |||
674 | ||||
675 | namespace { | |||
676 | constexpr uint32_t kNoneUdtKind = 0; | |||
677 | constexpr uint32_t kSimpleUdtKind = 1; | |||
678 | constexpr uint32_t kUnknownUdtKind = 2; | |||
679 | const StringRef NoneLabel("<none type>"); | |||
680 | const StringRef SimpleLabel("<simple type>"); | |||
681 | const StringRef UnknownLabel("<unknown type>"); | |||
682 | ||||
683 | } // namespace | |||
684 | ||||
685 | static StringRef getUdtStatLabel(uint32_t Kind) { | |||
686 | if (Kind == kNoneUdtKind) | |||
687 | return NoneLabel; | |||
688 | ||||
689 | if (Kind == kSimpleUdtKind) | |||
690 | return SimpleLabel; | |||
691 | ||||
692 | if (Kind == kUnknownUdtKind) | |||
693 | return UnknownLabel; | |||
694 | ||||
695 | return formatTypeLeafKind(static_cast<TypeLeafKind>(Kind)); | |||
696 | } | |||
697 | ||||
698 | static uint32_t getLongestTypeLeafName(const StatCollection &Stats) { | |||
699 | size_t L = 0; | |||
700 | for (const auto &Stat : Stats.Individual) { | |||
701 | StringRef Label = getUdtStatLabel(Stat.first); | |||
702 | L = std::max(L, Label.size()); | |||
703 | } | |||
704 | return static_cast<uint32_t>(L); | |||
705 | } | |||
706 | ||||
707 | Error DumpOutputStyle::dumpUdtStats() { | |||
708 | printHeader(P, "S_UDT Record Stats"); | |||
709 | ||||
710 | if (File.isPdb() && !getPdb().hasPDBGlobalsStream()) { | |||
711 | printStreamNotPresent("Globals"); | |||
712 | return Error::success(); | |||
713 | } | |||
714 | ||||
715 | StatCollection UdtStats; | |||
716 | StatCollection UdtTargetStats; | |||
717 | AutoIndent Indent(P, 4); | |||
718 | ||||
719 | auto &TpiTypes = File.types(); | |||
720 | ||||
721 | StringMap<StatCollection::Stat> NamespacedStats; | |||
722 | ||||
723 | size_t LongestNamespace = 0; | |||
724 | auto HandleOneSymbol = [&](const CVSymbol &Sym) { | |||
725 | if (Sym.kind() != SymbolKind::S_UDT) | |||
726 | return; | |||
727 | UdtStats.update(SymbolKind::S_UDT, Sym.length()); | |||
728 | ||||
729 | UDTSym UDT = cantFail(SymbolDeserializer::deserializeAs<UDTSym>(Sym)); | |||
730 | ||||
731 | uint32_t Kind = 0; | |||
732 | uint32_t RecordSize = 0; | |||
733 | ||||
734 | if (UDT.Type.isNoneType()) | |||
735 | Kind = kNoneUdtKind; | |||
736 | else if (UDT.Type.isSimple()) | |||
737 | Kind = kSimpleUdtKind; | |||
738 | else if (Optional<CVType> T = TpiTypes.tryGetType(UDT.Type)) { | |||
739 | Kind = T->kind(); | |||
740 | RecordSize = T->length(); | |||
741 | } else | |||
742 | Kind = kUnknownUdtKind; | |||
743 | ||||
744 | UdtTargetStats.update(Kind, RecordSize); | |||
745 | ||||
746 | size_t Pos = UDT.Name.find("::"); | |||
747 | if (Pos == StringRef::npos) | |||
748 | return; | |||
749 | ||||
750 | StringRef Scope = UDT.Name.take_front(Pos); | |||
751 | if (Scope.empty() || !isValidNamespaceIdentifier(Scope)) | |||
752 | return; | |||
753 | ||||
754 | LongestNamespace = std::max(LongestNamespace, Scope.size()); | |||
755 | NamespacedStats[Scope].update(RecordSize); | |||
756 | }; | |||
757 | ||||
758 | P.NewLine(); | |||
759 | ||||
760 | if (File.isPdb()) { | |||
761 | auto &SymbolRecords = cantFail(getPdb().getPDBSymbolStream()); | |||
762 | auto ExpGlobals = getPdb().getPDBGlobalsStream(); | |||
763 | if (!ExpGlobals) | |||
764 | return ExpGlobals.takeError(); | |||
765 | ||||
766 | for (uint32_t PubSymOff : ExpGlobals->getGlobalsTable()) { | |||
767 | CVSymbol Sym = SymbolRecords.readRecord(PubSymOff); | |||
768 | HandleOneSymbol(Sym); | |||
769 | } | |||
770 | } else { | |||
771 | for (const auto &Sec : File.symbol_groups()) { | |||
772 | for (const auto &SS : Sec.getDebugSubsections()) { | |||
773 | if (SS.kind() != DebugSubsectionKind::Symbols) | |||
774 | continue; | |||
775 | ||||
776 | DebugSymbolsSubsectionRef Symbols; | |||
777 | BinaryStreamReader Reader(SS.getRecordData()); | |||
778 | cantFail(Symbols.initialize(Reader)); | |||
779 | for (const auto &S : Symbols) | |||
780 | HandleOneSymbol(S); | |||
781 | } | |||
782 | } | |||
783 | } | |||
784 | ||||
785 | LongestNamespace += StringRef(" namespace ''").size(); | |||
786 | size_t LongestTypeLeafKind = getLongestTypeLeafName(UdtTargetStats); | |||
787 | size_t FieldWidth = std::max(LongestNamespace, LongestTypeLeafKind); | |||
788 | ||||
789 | // Compute the max number of digits for count and size fields, including comma | |||
790 | // separators. | |||
791 | StringRef CountHeader("Count"); | |||
792 | StringRef SizeHeader("Size"); | |||
793 | size_t CD = NumDigits(UdtStats.Totals.Count); | |||
794 | CD += (CD - 1) / 3; | |||
795 | CD = std::max(CD, CountHeader.size()); | |||
796 | ||||
797 | size_t SD = NumDigits(UdtStats.Totals.Size); | |||
798 | SD += (SD - 1) / 3; | |||
799 | SD = std::max(SD, SizeHeader.size()); | |||
800 | ||||
801 | uint32_t TableWidth = FieldWidth + 3 + CD + 2 + SD + 1; | |||
802 | ||||
803 | P.formatLine("{0} | {1} {2}", | |||
804 | fmt_align("Record Kind", AlignStyle::Right, FieldWidth), | |||
805 | fmt_align(CountHeader, AlignStyle::Right, CD), | |||
806 | fmt_align(SizeHeader, AlignStyle::Right, SD)); | |||
807 | ||||
808 | P.formatLine("{0}", fmt_repeat('-', TableWidth)); | |||
809 | for (const auto &Stat : UdtTargetStats.Individual) { | |||
810 | StringRef Label = getUdtStatLabel(Stat.first); | |||
811 | P.formatLine("{0} | {1:N} {2:N}", | |||
812 | fmt_align(Label, AlignStyle::Right, FieldWidth), | |||
813 | fmt_align(Stat.second.Count, AlignStyle::Right, CD), | |||
814 | fmt_align(Stat.second.Size, AlignStyle::Right, SD)); | |||
815 | } | |||
816 | P.formatLine("{0}", fmt_repeat('-', TableWidth)); | |||
817 | P.formatLine("{0} | {1:N} {2:N}", | |||
818 | fmt_align("Total (S_UDT)", AlignStyle::Right, FieldWidth), | |||
819 | fmt_align(UdtStats.Totals.Count, AlignStyle::Right, CD), | |||
820 | fmt_align(UdtStats.Totals.Size, AlignStyle::Right, SD)); | |||
821 | P.formatLine("{0}", fmt_repeat('-', TableWidth)); | |||
822 | for (const auto &Stat : NamespacedStats) { | |||
823 | std::string Label = formatv("namespace '{0}'", Stat.getKey()); | |||
824 | P.formatLine("{0} | {1:N} {2:N}", | |||
825 | fmt_align(Label, AlignStyle::Right, FieldWidth), | |||
826 | fmt_align(Stat.second.Count, AlignStyle::Right, CD), | |||
827 | fmt_align(Stat.second.Size, AlignStyle::Right, SD)); | |||
828 | } | |||
829 | return Error::success(); | |||
830 | } | |||
831 | ||||
832 | static void typesetLinesAndColumns(LinePrinter &P, uint32_t Start, | |||
833 | const LineColumnEntry &E) { | |||
834 | const uint32_t kMaxCharsPerLineNumber = 4; // 4 digit line number | |||
835 | uint32_t MinColumnWidth = kMaxCharsPerLineNumber + 5; | |||
836 | ||||
837 | // Let's try to keep it under 100 characters | |||
838 | constexpr uint32_t kMaxRowLength = 100; | |||
839 | // At least 3 spaces between columns. | |||
840 | uint32_t ColumnsPerRow = kMaxRowLength / (MinColumnWidth + 3); | |||
841 | uint32_t ItemsLeft = E.LineNumbers.size(); | |||
842 | auto LineIter = E.LineNumbers.begin(); | |||
843 | while (ItemsLeft != 0) { | |||
844 | uint32_t RowColumns = std::min(ItemsLeft, ColumnsPerRow); | |||
845 | for (uint32_t I = 0; I < RowColumns; ++I) { | |||
846 | LineInfo Line(LineIter->Flags); | |||
847 | std::string LineStr; | |||
848 | if (Line.isAlwaysStepInto()) | |||
849 | LineStr = "ASI"; | |||
850 | else if (Line.isNeverStepInto()) | |||
851 | LineStr = "NSI"; | |||
852 | else | |||
853 | LineStr = utostr(Line.getStartLine()); | |||
854 | char Statement = Line.isStatement() ? ' ' : '!'; | |||
855 | P.format("{0} {1:X-} {2} ", | |||
856 | fmt_align(LineStr, AlignStyle::Right, kMaxCharsPerLineNumber), | |||
857 | fmt_align(Start + LineIter->Offset, AlignStyle::Right, 8, '0'), | |||
858 | Statement); | |||
859 | ++LineIter; | |||
860 | --ItemsLeft; | |||
861 | } | |||
862 | P.NewLine(); | |||
863 | } | |||
864 | } | |||
865 | ||||
866 | Error DumpOutputStyle::dumpLines() { | |||
867 | printHeader(P, "Lines"); | |||
868 | ||||
869 | if (File.isPdb() && !getPdb().hasPDBDbiStream()) { | |||
870 | printStreamNotPresent("DBI"); | |||
871 | return Error::success(); | |||
872 | } | |||
873 | ||||
874 | uint32_t LastModi = UINT32_MAX(4294967295U); | |||
875 | uint32_t LastNameIndex = UINT32_MAX(4294967295U); | |||
876 | iterateModuleSubsections<DebugLinesSubsectionRef>( | |||
877 | File, PrintScope{P, 4}, | |||
878 | [this, &LastModi, &LastNameIndex](uint32_t Modi, | |||
879 | const SymbolGroup &Strings, | |||
880 | DebugLinesSubsectionRef &Lines) { | |||
881 | uint16_t Segment = Lines.header()->RelocSegment; | |||
882 | uint32_t Begin = Lines.header()->RelocOffset; | |||
883 | uint32_t End = Begin + Lines.header()->CodeSize; | |||
884 | for (const auto &Block : Lines) { | |||
885 | if (LastModi != Modi || LastNameIndex != Block.NameIndex) { | |||
886 | LastModi = Modi; | |||
887 | LastNameIndex = Block.NameIndex; | |||
888 | Strings.formatFromChecksumsOffset(P, Block.NameIndex); | |||
889 | } | |||
890 | ||||
891 | AutoIndent Indent(P, 2); | |||
892 | P.formatLine("{0:X-4}:{1:X-8}-{2:X-8}, ", Segment, Begin, End); | |||
893 | uint32_t Count = Block.LineNumbers.size(); | |||
894 | if (Lines.hasColumnInfo()) | |||
895 | P.format("line/column/addr entries = {0}", Count); | |||
896 | else | |||
897 | P.format("line/addr entries = {0}", Count); | |||
898 | ||||
899 | P.NewLine(); | |||
900 | typesetLinesAndColumns(P, Begin, Block); | |||
901 | } | |||
902 | }); | |||
903 | ||||
904 | return Error::success(); | |||
905 | } | |||
906 | ||||
907 | Error DumpOutputStyle::dumpInlineeLines() { | |||
908 | printHeader(P, "Inlinee Lines"); | |||
909 | ||||
910 | if (File.isPdb() && !getPdb().hasPDBDbiStream()) { | |||
911 | printStreamNotPresent("DBI"); | |||
912 | return Error::success(); | |||
913 | } | |||
914 | ||||
915 | iterateModuleSubsections<DebugInlineeLinesSubsectionRef>( | |||
916 | File, PrintScope{P, 2}, | |||
917 | [this](uint32_t Modi, const SymbolGroup &Strings, | |||
918 | DebugInlineeLinesSubsectionRef &Lines) { | |||
919 | P.formatLine("{0,+8} | {1,+5} | {2}", "Inlinee", "Line", "Source File"); | |||
920 | for (const auto &Entry : Lines) { | |||
921 | P.formatLine("{0,+8} | {1,+5} | ", Entry.Header->Inlinee, | |||
922 | fmtle(Entry.Header->SourceLineNum)); | |||
923 | Strings.formatFromChecksumsOffset(P, Entry.Header->FileID, true); | |||
924 | } | |||
925 | P.NewLine(); | |||
926 | }); | |||
927 | ||||
928 | return Error::success(); | |||
929 | } | |||
930 | ||||
931 | Error DumpOutputStyle::dumpXmi() { | |||
932 | printHeader(P, "Cross Module Imports"); | |||
933 | ||||
934 | if (File.isPdb() && !getPdb().hasPDBDbiStream()) { | |||
935 | printStreamNotPresent("DBI"); | |||
936 | return Error::success(); | |||
937 | } | |||
938 | ||||
939 | iterateModuleSubsections<DebugCrossModuleImportsSubsectionRef>( | |||
940 | File, PrintScope{P, 2}, | |||
941 | [this](uint32_t Modi, const SymbolGroup &Strings, | |||
942 | DebugCrossModuleImportsSubsectionRef &Imports) { | |||
943 | P.formatLine("{0,=32} | {1}", "Imported Module", "Type IDs"); | |||
944 | ||||
945 | for (const auto &Xmi : Imports) { | |||
946 | auto ExpectedModule = | |||
947 | Strings.getNameFromStringTable(Xmi.Header->ModuleNameOffset); | |||
948 | StringRef Module; | |||
949 | SmallString<32> ModuleStorage; | |||
950 | if (!ExpectedModule) { | |||
951 | Module = "(unknown module)"; | |||
952 | consumeError(ExpectedModule.takeError()); | |||
953 | } else | |||
954 | Module = *ExpectedModule; | |||
955 | if (Module.size() > 32) { | |||
956 | ModuleStorage = "..."; | |||
957 | ModuleStorage += Module.take_back(32 - 3); | |||
958 | Module = ModuleStorage; | |||
959 | } | |||
960 | std::vector<std::string> TIs; | |||
961 | for (const auto I : Xmi.Imports) | |||
962 | TIs.push_back(formatv("{0,+10:X+}", fmtle(I))); | |||
963 | std::string Result = | |||
964 | typesetItemList(TIs, P.getIndentLevel() + 35, 12, " "); | |||
965 | P.formatLine("{0,+32} | {1}", Module, Result); | |||
966 | } | |||
967 | }); | |||
968 | ||||
969 | return Error::success(); | |||
970 | } | |||
971 | ||||
972 | Error DumpOutputStyle::dumpXme() { | |||
973 | printHeader(P, "Cross Module Exports"); | |||
974 | ||||
975 | if (File.isPdb() && !getPdb().hasPDBDbiStream()) { | |||
976 | printStreamNotPresent("DBI"); | |||
977 | return Error::success(); | |||
978 | } | |||
979 | ||||
980 | iterateModuleSubsections<DebugCrossModuleExportsSubsectionRef>( | |||
981 | File, PrintScope{P, 2}, | |||
982 | [this](uint32_t Modi, const SymbolGroup &Strings, | |||
983 | DebugCrossModuleExportsSubsectionRef &Exports) { | |||
984 | P.formatLine("{0,-10} | {1}", "Local ID", "Global ID"); | |||
985 | for (const auto &Export : Exports) { | |||
986 | P.formatLine("{0,+10:X+} | {1}", TypeIndex(Export.Local), | |||
987 | TypeIndex(Export.Global)); | |||
988 | } | |||
989 | }); | |||
990 | ||||
991 | return Error::success(); | |||
992 | } | |||
993 | ||||
994 | std::string formatFrameType(object::frame_type FT) { | |||
995 | switch (FT) { | |||
996 | case object::frame_type::Fpo: | |||
997 | return "FPO"; | |||
998 | case object::frame_type::NonFpo: | |||
999 | return "Non-FPO"; | |||
1000 | case object::frame_type::Trap: | |||
1001 | return "Trap"; | |||
1002 | case object::frame_type::Tss: | |||
1003 | return "TSS"; | |||
1004 | } | |||
1005 | return "<unknown>"; | |||
1006 | } | |||
1007 | ||||
1008 | Error DumpOutputStyle::dumpOldFpo(PDBFile &File) { | |||
1009 | printHeader(P, "Old FPO Data"); | |||
1010 | ||||
1011 | ExitOnError Err("Error dumping old fpo data:"); | |||
1012 | auto &Dbi = Err(File.getPDBDbiStream()); | |||
1013 | ||||
1014 | uint32_t Index = Dbi.getDebugStreamIndex(DbgHeaderType::FPO); | |||
1015 | if (Index == kInvalidStreamIndex) { | |||
1016 | printStreamNotPresent("FPO"); | |||
1017 | return Error::success(); | |||
1018 | } | |||
1019 | ||||
1020 | std::unique_ptr<MappedBlockStream> OldFpo = File.createIndexedStream(Index); | |||
1021 | BinaryStreamReader Reader(*OldFpo); | |||
1022 | FixedStreamArray<object::FpoData> Records; | |||
1023 | Err(Reader.readArray(Records, | |||
1024 | Reader.bytesRemaining() / sizeof(object::FpoData))); | |||
1025 | ||||
1026 | P.printLine(" RVA | Code | Locals | Params | Prolog | Saved Regs | Use " | |||
1027 | "BP | Has SEH | Frame Type"); | |||
1028 | ||||
1029 | for (const object::FpoData &FD : Records) { | |||
1030 | P.formatLine("{0:X-8} | {1,4} | {2,6} | {3,6} | {4,6} | {5,10} | {6,6} | " | |||
1031 | "{7,7} | {8,9}", | |||
1032 | uint32_t(FD.Offset), uint32_t(FD.Size), uint32_t(FD.NumLocals), | |||
1033 | uint32_t(FD.NumParams), FD.getPrologSize(), | |||
1034 | FD.getNumSavedRegs(), FD.useBP(), FD.hasSEH(), | |||
1035 | formatFrameType(FD.getFP())); | |||
1036 | } | |||
1037 | return Error::success(); | |||
1038 | } | |||
1039 | ||||
1040 | Error DumpOutputStyle::dumpNewFpo(PDBFile &File) { | |||
1041 | printHeader(P, "New FPO Data"); | |||
1042 | ||||
1043 | ExitOnError Err("Error dumping new fpo data:"); | |||
1044 | auto &Dbi = Err(File.getPDBDbiStream()); | |||
1045 | ||||
1046 | uint32_t Index = Dbi.getDebugStreamIndex(DbgHeaderType::NewFPO); | |||
1047 | if (Index == kInvalidStreamIndex) { | |||
1048 | printStreamNotPresent("New FPO"); | |||
1049 | return Error::success(); | |||
1050 | } | |||
1051 | ||||
1052 | std::unique_ptr<MappedBlockStream> NewFpo = File.createIndexedStream(Index); | |||
1053 | ||||
1054 | DebugFrameDataSubsectionRef FDS; | |||
1055 | if (auto EC = FDS.initialize(*NewFpo)) | |||
1056 | return make_error<RawError>(raw_error_code::corrupt_file, | |||
1057 | "Invalid new fpo stream"); | |||
1058 | ||||
1059 | P.printLine(" RVA | Code | Locals | Params | Stack | Prolog | Saved Regs " | |||
1060 | "| Has SEH | Has C++EH | Start | Program"); | |||
1061 | for (const FrameData &FD : FDS) { | |||
1062 | bool IsFuncStart = FD.Flags & FrameData::IsFunctionStart; | |||
1063 | bool HasEH = FD.Flags & FrameData::HasEH; | |||
1064 | bool HasSEH = FD.Flags & FrameData::HasSEH; | |||
1065 | ||||
1066 | auto &StringTable = Err(File.getStringTable()); | |||
1067 | ||||
1068 | auto Program = Err(StringTable.getStringForID(FD.FrameFunc)); | |||
1069 | P.formatLine("{0:X-8} | {1,4} | {2,6} | {3,6} | {4,5} | {5,6} | {6,10} | " | |||
1070 | "{7,7} | {8,9} | {9,5} | {10}", | |||
1071 | uint32_t(FD.RvaStart), uint32_t(FD.CodeSize), | |||
1072 | uint32_t(FD.LocalSize), uint32_t(FD.ParamsSize), | |||
1073 | uint32_t(FD.MaxStackSize), uint16_t(FD.PrologSize), | |||
1074 | uint16_t(FD.SavedRegsSize), HasSEH, HasEH, IsFuncStart, | |||
1075 | Program); | |||
1076 | } | |||
1077 | return Error::success(); | |||
1078 | } | |||
1079 | ||||
1080 | Error DumpOutputStyle::dumpFpo() { | |||
1081 | if (!File.isPdb()) { | |||
1082 | printStreamNotValidForObj(); | |||
1083 | return Error::success(); | |||
1084 | } | |||
1085 | ||||
1086 | PDBFile &File = getPdb(); | |||
1087 | if (!File.hasPDBDbiStream()) { | |||
1088 | printStreamNotPresent("DBI"); | |||
1089 | return Error::success(); | |||
1090 | } | |||
1091 | ||||
1092 | if (auto EC = dumpOldFpo(File)) | |||
1093 | return EC; | |||
1094 | if (auto EC = dumpNewFpo(File)) | |||
1095 | return EC; | |||
1096 | return Error::success(); | |||
1097 | } | |||
1098 | ||||
1099 | Error DumpOutputStyle::dumpStringTableFromPdb() { | |||
1100 | AutoIndent Indent(P); | |||
1101 | auto IS = getPdb().getStringTable(); | |||
1102 | if (!IS) { | |||
1103 | P.formatLine("Not present in file"); | |||
1104 | consumeError(IS.takeError()); | |||
1105 | return Error::success(); | |||
1106 | } | |||
1107 | ||||
1108 | if (opts::dump::DumpStringTable) { | |||
1109 | if (IS->name_ids().empty()) | |||
1110 | P.formatLine("Empty"); | |||
1111 | else { | |||
1112 | auto MaxID = | |||
1113 | std::max_element(IS->name_ids().begin(), IS->name_ids().end()); | |||
1114 | uint32_t Digits = NumDigits(*MaxID); | |||
1115 | ||||
1116 | P.formatLine("{0} | {1}", fmt_align("ID", AlignStyle::Right, Digits), | |||
1117 | "String"); | |||
1118 | ||||
1119 | std::vector<uint32_t> SortedIDs(IS->name_ids().begin(), | |||
1120 | IS->name_ids().end()); | |||
1121 | llvm::sort(SortedIDs); | |||
1122 | for (uint32_t I : SortedIDs) { | |||
1123 | auto ES = IS->getStringForID(I); | |||
1124 | llvm::SmallString<32> Str; | |||
1125 | if (!ES) { | |||
1126 | consumeError(ES.takeError()); | |||
1127 | Str = "Error reading string"; | |||
1128 | } else if (!ES->empty()) { | |||
1129 | Str.append("'"); | |||
1130 | Str.append(*ES); | |||
1131 | Str.append("'"); | |||
1132 | } | |||
1133 | ||||
1134 | if (!Str.empty()) | |||
1135 | P.formatLine("{0} | {1}", fmt_align(I, AlignStyle::Right, Digits), | |||
1136 | Str); | |||
1137 | } | |||
1138 | } | |||
1139 | } | |||
1140 | ||||
1141 | if (opts::dump::DumpStringTableDetails) { | |||
1142 | P.NewLine(); | |||
1143 | { | |||
1144 | P.printLine("String Table Header:"); | |||
1145 | AutoIndent Indent(P); | |||
1146 | P.formatLine("Signature: {0}", IS->getSignature()); | |||
1147 | P.formatLine("Hash Version: {0}", IS->getHashVersion()); | |||
1148 | P.formatLine("Name Buffer Size: {0}", IS->getByteSize()); | |||
1149 | P.NewLine(); | |||
1150 | } | |||
1151 | ||||
1152 | BinaryStreamRef NameBuffer = IS->getStringTable().getBuffer(); | |||
1153 | ArrayRef<uint8_t> Contents; | |||
1154 | cantFail(NameBuffer.readBytes(0, NameBuffer.getLength(), Contents)); | |||
1155 | P.formatBinary("Name Buffer", Contents, 0); | |||
1156 | P.NewLine(); | |||
1157 | { | |||
1158 | P.printLine("Hash Table:"); | |||
1159 | AutoIndent Indent(P); | |||
1160 | P.formatLine("Bucket Count: {0}", IS->name_ids().size()); | |||
1161 | for (const auto &Entry : enumerate(IS->name_ids())) | |||
1162 | P.formatLine("Bucket[{0}] : {1}", Entry.index(), | |||
1163 | uint32_t(Entry.value())); | |||
1164 | P.formatLine("Name Count: {0}", IS->getNameCount()); | |||
1165 | } | |||
1166 | } | |||
1167 | return Error::success(); | |||
1168 | } | |||
1169 | ||||
1170 | Error DumpOutputStyle::dumpStringTableFromObj() { | |||
1171 | iterateModuleSubsections<DebugStringTableSubsectionRef>( | |||
1172 | File, PrintScope{P, 4}, | |||
1173 | [&](uint32_t Modi, const SymbolGroup &Strings, | |||
1174 | DebugStringTableSubsectionRef &Strings2) { | |||
1175 | BinaryStreamRef StringTableBuffer = Strings2.getBuffer(); | |||
1176 | BinaryStreamReader Reader(StringTableBuffer); | |||
1177 | while (Reader.bytesRemaining() > 0) { | |||
1178 | StringRef Str; | |||
1179 | uint32_t Offset = Reader.getOffset(); | |||
1180 | cantFail(Reader.readCString(Str)); | |||
1181 | if (Str.empty()) | |||
1182 | continue; | |||
1183 | ||||
1184 | P.formatLine("{0} | {1}", fmt_align(Offset, AlignStyle::Right, 4), | |||
1185 | Str); | |||
1186 | } | |||
1187 | }); | |||
1188 | return Error::success(); | |||
1189 | } | |||
1190 | ||||
1191 | Error DumpOutputStyle::dumpNamedStreams() { | |||
1192 | printHeader(P, "Named Streams"); | |||
1193 | ||||
1194 | if (File.isObj()) { | |||
1195 | printStreamNotValidForObj(); | |||
1196 | return Error::success(); | |||
1197 | } | |||
1198 | ||||
1199 | AutoIndent Indent(P); | |||
1200 | ExitOnError Err("Invalid PDB File: "); | |||
1201 | ||||
1202 | auto &IS = Err(File.pdb().getPDBInfoStream()); | |||
1203 | const NamedStreamMap &NS = IS.getNamedStreams(); | |||
1204 | for (const auto &Entry : NS.entries()) { | |||
1205 | P.printLine(Entry.getKey()); | |||
1206 | AutoIndent Indent2(P, 2); | |||
1207 | P.formatLine("Index: {0}", Entry.getValue()); | |||
1208 | P.formatLine("Size in bytes: {0}", | |||
1209 | File.pdb().getStreamByteSize(Entry.getValue())); | |||
1210 | } | |||
1211 | ||||
1212 | return Error::success(); | |||
1213 | } | |||
1214 | ||||
1215 | Error DumpOutputStyle::dumpStringTable() { | |||
1216 | printHeader(P, "String Table"); | |||
1217 | ||||
1218 | if (File.isPdb()) | |||
1219 | return dumpStringTableFromPdb(); | |||
1220 | ||||
1221 | return dumpStringTableFromObj(); | |||
1222 | } | |||
1223 | ||||
1224 | static void buildDepSet(LazyRandomTypeCollection &Types, | |||
1225 | ArrayRef<TypeIndex> Indices, | |||
1226 | std::map<TypeIndex, CVType> &DepSet) { | |||
1227 | SmallVector<TypeIndex, 4> DepList; | |||
1228 | for (const auto &I : Indices) { | |||
1229 | TypeIndex TI(I); | |||
1230 | if (DepSet.find(TI) != DepSet.end() || TI.isSimple() || TI.isNoneType()) | |||
1231 | continue; | |||
1232 | ||||
1233 | CVType Type = Types.getType(TI); | |||
1234 | DepSet[TI] = Type; | |||
1235 | codeview::discoverTypeIndices(Type, DepList); | |||
1236 | buildDepSet(Types, DepList, DepSet); | |||
1237 | } | |||
1238 | } | |||
1239 | ||||
1240 | static void | |||
1241 | dumpFullTypeStream(LinePrinter &Printer, LazyRandomTypeCollection &Types, | |||
1242 | uint32_t NumTypeRecords, uint32_t NumHashBuckets, | |||
1243 | FixedStreamArray<support::ulittle32_t> HashValues, | |||
1244 | TpiStream *Stream, bool Bytes, bool Extras) { | |||
1245 | ||||
1246 | Printer.formatLine("Showing {0:N} records", NumTypeRecords); | |||
1247 | uint32_t Width = NumDigits(TypeIndex::FirstNonSimpleIndex + NumTypeRecords); | |||
1248 | ||||
1249 | MinimalTypeDumpVisitor V(Printer, Width + 2, Bytes, Extras, Types, | |||
1250 | NumHashBuckets, HashValues, Stream); | |||
1251 | ||||
1252 | if (auto EC = codeview::visitTypeStream(Types, V)) { | |||
1253 | Printer.formatLine("An error occurred dumping type records: {0}", | |||
1254 | toString(std::move(EC))); | |||
1255 | } | |||
1256 | } | |||
1257 | ||||
1258 | static void dumpPartialTypeStream(LinePrinter &Printer, | |||
1259 | LazyRandomTypeCollection &Types, | |||
1260 | TpiStream &Stream, ArrayRef<TypeIndex> TiList, | |||
1261 | bool Bytes, bool Extras, bool Deps) { | |||
1262 | uint32_t Width = | |||
1263 | NumDigits(TypeIndex::FirstNonSimpleIndex + Stream.getNumTypeRecords()); | |||
1264 | ||||
1265 | MinimalTypeDumpVisitor V(Printer, Width + 2, Bytes, Extras, Types, | |||
1266 | Stream.getNumHashBuckets(), Stream.getHashValues(), | |||
1267 | &Stream); | |||
1268 | ||||
1269 | if (opts::dump::DumpTypeDependents) { | |||
1270 | // If we need to dump all dependents, then iterate each index and find | |||
1271 | // all dependents, adding them to a map ordered by TypeIndex. | |||
1272 | std::map<TypeIndex, CVType> DepSet; | |||
1273 | buildDepSet(Types, TiList, DepSet); | |||
1274 | ||||
1275 | Printer.formatLine( | |||
1276 | "Showing {0:N} records and their dependents ({1:N} records total)", | |||
1277 | TiList.size(), DepSet.size()); | |||
1278 | ||||
1279 | for (auto &Dep : DepSet) { | |||
1280 | if (auto EC = codeview::visitTypeRecord(Dep.second, Dep.first, V)) | |||
1281 | Printer.formatLine("An error occurred dumping type record {0}: {1}", | |||
1282 | Dep.first, toString(std::move(EC))); | |||
1283 | } | |||
1284 | } else { | |||
1285 | Printer.formatLine("Showing {0:N} records.", TiList.size()); | |||
1286 | ||||
1287 | for (const auto &I : TiList) { | |||
1288 | TypeIndex TI(I); | |||
1289 | CVType Type = Types.getType(TI); | |||
1290 | if (auto EC = codeview::visitTypeRecord(Type, TI, V)) | |||
1291 | Printer.formatLine("An error occurred dumping type record {0}: {1}", TI, | |||
1292 | toString(std::move(EC))); | |||
1293 | } | |||
1294 | } | |||
1295 | } | |||
1296 | ||||
1297 | Error DumpOutputStyle::dumpTypesFromObjectFile() { | |||
1298 | LazyRandomTypeCollection Types(100); | |||
1299 | ||||
1300 | for (const auto &S : getObj().sections()) { | |||
1301 | StringRef SectionName; | |||
1302 | if (auto EC = S.getName(SectionName)) | |||
| ||||
1303 | return errorCodeToError(EC); | |||
1304 | ||||
1305 | // .debug$T is a standard CodeView type section, while .debug$P is the same | |||
1306 | // format but used for MSVC precompiled header object files. | |||
1307 | if (SectionName == ".debug$T") | |||
1308 | printHeader(P, "Types (.debug$T)"); | |||
1309 | else if (SectionName == ".debug$P") | |||
1310 | printHeader(P, "Precompiled Types (.debug$P)"); | |||
1311 | else | |||
1312 | continue; | |||
1313 | ||||
1314 | StringRef Contents; | |||
1315 | if (auto EC = S.getContents(Contents)) | |||
1316 | return errorCodeToError(EC); | |||
1317 | ||||
1318 | uint32_t Magic; | |||
1319 | BinaryStreamReader Reader(Contents, llvm::support::little); | |||
1320 | if (auto EC = Reader.readInteger(Magic)) | |||
1321 | return EC; | |||
1322 | if (Magic != COFF::DEBUG_SECTION_MAGIC) | |||
1323 | return make_error<StringError>("Invalid CodeView debug section.", | |||
1324 | inconvertibleErrorCode()); | |||
1325 | ||||
1326 | Types.reset(Reader, 100); | |||
1327 | ||||
1328 | if (opts::dump::DumpTypes) { | |||
1329 | dumpFullTypeStream(P, Types, 0, 0, {}, nullptr, opts::dump::DumpTypeData, | |||
1330 | false); | |||
1331 | } else if (opts::dump::DumpTypeExtras) { | |||
1332 | auto LocalHashes = LocallyHashedType::hashTypeCollection(Types); | |||
1333 | auto GlobalHashes = GloballyHashedType::hashTypeCollection(Types); | |||
1334 | assert(LocalHashes.size() == GlobalHashes.size())((LocalHashes.size() == GlobalHashes.size()) ? static_cast< void> (0) : __assert_fail ("LocalHashes.size() == GlobalHashes.size()" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/llvm-pdbutil/DumpOutputStyle.cpp" , 1334, __PRETTY_FUNCTION__)); | |||
1335 | ||||
1336 | P.formatLine("Local / Global hashes:"); | |||
1337 | TypeIndex TI(TypeIndex::FirstNonSimpleIndex); | |||
1338 | for (const auto &H : zip(LocalHashes, GlobalHashes)) { | |||
1339 | AutoIndent Indent2(P); | |||
1340 | LocallyHashedType &L = std::get<0>(H); | |||
1341 | GloballyHashedType &G = std::get<1>(H); | |||
1342 | ||||
1343 | P.formatLine("TI: {0}, LocalHash: {1:X}, GlobalHash: {2}", TI, L, G); | |||
1344 | ||||
1345 | ++TI; | |||
1346 | } | |||
1347 | P.NewLine(); | |||
1348 | } | |||
1349 | } | |||
1350 | ||||
1351 | return Error::success(); | |||
1352 | } | |||
1353 | ||||
1354 | Error DumpOutputStyle::dumpTpiStream(uint32_t StreamIdx) { | |||
1355 | assert(StreamIdx == StreamTPI || StreamIdx == StreamIPI)((StreamIdx == StreamTPI || StreamIdx == StreamIPI) ? static_cast <void> (0) : __assert_fail ("StreamIdx == StreamTPI || StreamIdx == StreamIPI" , "/build/llvm-toolchain-snapshot-8~svn345461/tools/llvm-pdbutil/DumpOutputStyle.cpp" , 1355, __PRETTY_FUNCTION__)); | |||
1356 | ||||
1357 | if (StreamIdx == StreamTPI) { | |||
1358 | printHeader(P, "Types (TPI Stream)"); | |||
1359 | } else if (StreamIdx == StreamIPI) { | |||
1360 | printHeader(P, "Types (IPI Stream)"); | |||
1361 | } | |||
1362 | ||||
1363 | assert(!File.isObj())((!File.isObj()) ? static_cast<void> (0) : __assert_fail ("!File.isObj()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/llvm-pdbutil/DumpOutputStyle.cpp" , 1363, __PRETTY_FUNCTION__)); | |||
1364 | ||||
1365 | bool Present = false; | |||
1366 | bool DumpTypes = false; | |||
1367 | bool DumpBytes = false; | |||
1368 | bool DumpExtras = false; | |||
1369 | std::vector<uint32_t> Indices; | |||
1370 | if (StreamIdx == StreamTPI) { | |||
1371 | Present = getPdb().hasPDBTpiStream(); | |||
1372 | DumpTypes = opts::dump::DumpTypes; | |||
1373 | DumpBytes = opts::dump::DumpTypeData; | |||
1374 | DumpExtras = opts::dump::DumpTypeExtras; | |||
1375 | Indices.assign(opts::dump::DumpTypeIndex.begin(), | |||
1376 | opts::dump::DumpTypeIndex.end()); | |||
1377 | } else if (StreamIdx == StreamIPI) { | |||
1378 | Present = getPdb().hasPDBIpiStream(); | |||
1379 | DumpTypes = opts::dump::DumpIds; | |||
1380 | DumpBytes = opts::dump::DumpIdData; | |||
1381 | DumpExtras = opts::dump::DumpIdExtras; | |||
1382 | Indices.assign(opts::dump::DumpIdIndex.begin(), | |||
1383 | opts::dump::DumpIdIndex.end()); | |||
1384 | } | |||
1385 | ||||
1386 | if (!Present) { | |||
1387 | printStreamNotPresent(StreamIdx == StreamTPI ? "TPI" : "IPI"); | |||
1388 | return Error::success(); | |||
1389 | } | |||
1390 | ||||
1391 | AutoIndent Indent(P); | |||
1392 | ExitOnError Err("Unexpected error processing types: "); | |||
1393 | ||||
1394 | auto &Stream = Err((StreamIdx == StreamTPI) ? getPdb().getPDBTpiStream() | |||
1395 | : getPdb().getPDBIpiStream()); | |||
1396 | ||||
1397 | auto &Types = (StreamIdx == StreamTPI) ? File.types() : File.ids(); | |||
1398 | ||||
1399 | // Enable resolving forward decls. | |||
1400 | Stream.buildHashMap(); | |||
1401 | ||||
1402 | if (DumpTypes || !Indices.empty()) { | |||
1403 | if (Indices.empty()) | |||
1404 | dumpFullTypeStream(P, Types, Stream.getNumTypeRecords(), | |||
1405 | Stream.getNumHashBuckets(), Stream.getHashValues(), | |||
1406 | &Stream, DumpBytes, DumpExtras); | |||
1407 | else { | |||
1408 | std::vector<TypeIndex> TiList(Indices.begin(), Indices.end()); | |||
1409 | dumpPartialTypeStream(P, Types, Stream, TiList, DumpBytes, DumpExtras, | |||
1410 | opts::dump::DumpTypeDependents); | |||
1411 | } | |||
1412 | } | |||
1413 | ||||
1414 | if (DumpExtras) { | |||
1415 | P.NewLine(); | |||
1416 | auto IndexOffsets = Stream.getTypeIndexOffsets(); | |||
1417 | P.formatLine("Type Index Offsets:"); | |||
1418 | for (const auto &IO : IndexOffsets) { | |||
1419 | AutoIndent Indent2(P); | |||
1420 | P.formatLine("TI: {0}, Offset: {1}", IO.Type, fmtle(IO.Offset)); | |||
1421 | } | |||
1422 | ||||
1423 | P.NewLine(); | |||
1424 | P.formatLine("Hash Adjusters:"); | |||
1425 | auto &Adjusters = Stream.getHashAdjusters(); | |||
1426 | auto &Strings = Err(getPdb().getStringTable()); | |||
1427 | for (const auto &A : Adjusters) { | |||
1428 | AutoIndent Indent2(P); | |||
1429 | auto ExpectedStr = Strings.getStringForID(A.first); | |||
1430 | TypeIndex TI(A.second); | |||
1431 | if (ExpectedStr) | |||
1432 | P.formatLine("`{0}` -> {1}", *ExpectedStr, TI); | |||
1433 | else { | |||
1434 | P.formatLine("unknown str id ({0}) -> {1}", A.first, TI); | |||
1435 | consumeError(ExpectedStr.takeError()); | |||
1436 | } | |||
1437 | } | |||
1438 | } | |||
1439 | return Error::success(); | |||
1440 | } | |||
1441 | ||||
1442 | Error DumpOutputStyle::dumpModuleSymsForObj() { | |||
1443 | printHeader(P, "Symbols"); | |||
1444 | ||||
1445 | AutoIndent Indent(P); | |||
1446 | ||||
1447 | ExitOnError Err("Unexpected error processing symbols: "); | |||
1448 | ||||
1449 | auto &Types = File.types(); | |||
1450 | ||||
1451 | SymbolVisitorCallbackPipeline Pipeline; | |||
1452 | SymbolDeserializer Deserializer(nullptr, CodeViewContainer::ObjectFile); | |||
1453 | MinimalSymbolDumper Dumper(P, opts::dump::DumpSymRecordBytes, Types, Types); | |||
1454 | ||||
1455 | Pipeline.addCallbackToPipeline(Deserializer); | |||
1456 | Pipeline.addCallbackToPipeline(Dumper); | |||
1457 | CVSymbolVisitor Visitor(Pipeline); | |||
1458 | ||||
1459 | std::unique_ptr<llvm::Error> SymbolError; | |||
1460 | ||||
1461 | iterateModuleSubsections<DebugSymbolsSubsectionRef>( | |||
1462 | File, PrintScope{P, 2}, | |||
1463 | [&](uint32_t Modi, const SymbolGroup &Strings, | |||
1464 | DebugSymbolsSubsectionRef &Symbols) { | |||
1465 | Dumper.setSymbolGroup(&Strings); | |||
1466 | for (auto Symbol : Symbols) { | |||
1467 | if (auto EC = Visitor.visitSymbolRecord(Symbol)) { | |||
1468 | SymbolError = llvm::make_unique<Error>(std::move(EC)); | |||
1469 | return; | |||
1470 | } | |||
1471 | } | |||
1472 | }); | |||
1473 | ||||
1474 | if (SymbolError) | |||
1475 | return std::move(*SymbolError); | |||
1476 | ||||
1477 | return Error::success(); | |||
1478 | } | |||
1479 | ||||
1480 | Error DumpOutputStyle::dumpModuleSymsForPdb() { | |||
1481 | printHeader(P, "Symbols"); | |||
1482 | ||||
1483 | if (File.isPdb() && !getPdb().hasPDBDbiStream()) { | |||
1484 | printStreamNotPresent("DBI"); | |||
1485 | return Error::success(); | |||
1486 | } | |||
1487 | ||||
1488 | AutoIndent Indent(P); | |||
1489 | ExitOnError Err("Unexpected error processing symbols: "); | |||
1490 | ||||
1491 | auto &Ids = File.ids(); | |||
1492 | auto &Types = File.types(); | |||
1493 | ||||
1494 | iterateSymbolGroups( | |||
1495 | File, PrintScope{P, 2}, [&](uint32_t I, const SymbolGroup &Strings) { | |||
1496 | auto ExpectedModS = getModuleDebugStream(File.pdb(), I); | |||
1497 | if (!ExpectedModS) { | |||
1498 | P.formatLine("Error loading module stream {0}. {1}", I, | |||
1499 | toString(ExpectedModS.takeError())); | |||
1500 | return; | |||
1501 | } | |||
1502 | ||||
1503 | ModuleDebugStreamRef &ModS = *ExpectedModS; | |||
1504 | ||||
1505 | SymbolVisitorCallbackPipeline Pipeline; | |||
1506 | SymbolDeserializer Deserializer(nullptr, CodeViewContainer::Pdb); | |||
1507 | MinimalSymbolDumper Dumper(P, opts::dump::DumpSymRecordBytes, Strings, | |||
1508 | Ids, Types); | |||
1509 | ||||
1510 | Pipeline.addCallbackToPipeline(Deserializer); | |||
1511 | Pipeline.addCallbackToPipeline(Dumper); | |||
1512 | CVSymbolVisitor Visitor(Pipeline); | |||
1513 | auto SS = ModS.getSymbolsSubstream(); | |||
1514 | if (auto EC = | |||
1515 | Visitor.visitSymbolStream(ModS.getSymbolArray(), SS.Offset)) { | |||
1516 | P.formatLine("Error while processing symbol records. {0}", | |||
1517 | toString(std::move(EC))); | |||
1518 | return; | |||
1519 | } | |||
1520 | }); | |||
1521 | return Error::success(); | |||
1522 | } | |||
1523 | ||||
1524 | Error DumpOutputStyle::dumpGSIRecords() { | |||
1525 | printHeader(P, "GSI Records"); | |||
1526 | ||||
1527 | if (File.isObj()) { | |||
1528 | printStreamNotValidForObj(); | |||
1529 | return Error::success(); | |||
1530 | } | |||
1531 | ||||
1532 | if (!getPdb().hasPDBSymbolStream()) { | |||
1533 | printStreamNotPresent("GSI Common Symbol"); | |||
1534 | return Error::success(); | |||
1535 | } | |||
1536 | ||||
1537 | AutoIndent Indent(P); | |||
1538 | ||||
1539 | auto &Records = cantFail(getPdb().getPDBSymbolStream()); | |||
1540 | auto &Types = File.types(); | |||
1541 | auto &Ids = File.ids(); | |||
1542 | ||||
1543 | P.printLine("Records"); | |||
1544 | SymbolVisitorCallbackPipeline Pipeline; | |||
1545 | SymbolDeserializer Deserializer(nullptr, CodeViewContainer::Pdb); | |||
1546 | MinimalSymbolDumper Dumper(P, opts::dump::DumpSymRecordBytes, Ids, Types); | |||
1547 | ||||
1548 | Pipeline.addCallbackToPipeline(Deserializer); | |||
1549 | Pipeline.addCallbackToPipeline(Dumper); | |||
1550 | CVSymbolVisitor Visitor(Pipeline); | |||
1551 | ||||
1552 | BinaryStreamRef SymStream = Records.getSymbolArray().getUnderlyingStream(); | |||
1553 | if (auto E = Visitor.visitSymbolStream(Records.getSymbolArray(), 0)) | |||
1554 | return E; | |||
1555 | return Error::success(); | |||
1556 | } | |||
1557 | ||||
1558 | Error DumpOutputStyle::dumpGlobals() { | |||
1559 | printHeader(P, "Global Symbols"); | |||
1560 | ||||
1561 | if (File.isObj()) { | |||
1562 | printStreamNotValidForObj(); | |||
1563 | return Error::success(); | |||
1564 | } | |||
1565 | ||||
1566 | if (!getPdb().hasPDBGlobalsStream()) { | |||
1567 | printStreamNotPresent("Globals"); | |||
1568 | return Error::success(); | |||
1569 | } | |||
1570 | ||||
1571 | AutoIndent Indent(P); | |||
1572 | ExitOnError Err("Error dumping globals stream: "); | |||
1573 | auto &Globals = Err(getPdb().getPDBGlobalsStream()); | |||
1574 | ||||
1575 | if (opts::dump::DumpGlobalNames.empty()) { | |||
1576 | const GSIHashTable &Table = Globals.getGlobalsTable(); | |||
1577 | Err(dumpSymbolsFromGSI(Table, opts::dump::DumpGlobalExtras)); | |||
1578 | } else { | |||
1579 | SymbolStream &SymRecords = cantFail(getPdb().getPDBSymbolStream()); | |||
1580 | auto &Types = File.types(); | |||
1581 | auto &Ids = File.ids(); | |||
1582 | ||||
1583 | SymbolVisitorCallbackPipeline Pipeline; | |||
1584 | SymbolDeserializer Deserializer(nullptr, CodeViewContainer::Pdb); | |||
1585 | MinimalSymbolDumper Dumper(P, opts::dump::DumpSymRecordBytes, Ids, Types); | |||
1586 | ||||
1587 | Pipeline.addCallbackToPipeline(Deserializer); | |||
1588 | Pipeline.addCallbackToPipeline(Dumper); | |||
1589 | CVSymbolVisitor Visitor(Pipeline); | |||
1590 | ||||
1591 | using ResultEntryType = std::pair<uint32_t, CVSymbol>; | |||
1592 | for (StringRef Name : opts::dump::DumpGlobalNames) { | |||
1593 | AutoIndent Indent(P); | |||
1594 | P.formatLine("Global Name `{0}`", Name); | |||
1595 | std::vector<ResultEntryType> Results = | |||
1596 | Globals.findRecordsByName(Name, SymRecords); | |||
1597 | if (Results.empty()) { | |||
1598 | AutoIndent Indent(P); | |||
1599 | P.printLine("(no matching records found)"); | |||
1600 | continue; | |||
1601 | } | |||
1602 | ||||
1603 | for (ResultEntryType Result : Results) { | |||
1604 | if (auto E = Visitor.visitSymbolRecord(Result.second, Result.first)) | |||
1605 | return E; | |||
1606 | } | |||
1607 | } | |||
1608 | } | |||
1609 | return Error::success(); | |||
1610 | } | |||
1611 | ||||
1612 | Error DumpOutputStyle::dumpPublics() { | |||
1613 | printHeader(P, "Public Symbols"); | |||
1614 | ||||
1615 | if (File.isObj()) { | |||
1616 | printStreamNotValidForObj(); | |||
1617 | return Error::success(); | |||
1618 | } | |||
1619 | ||||
1620 | if (!getPdb().hasPDBPublicsStream()) { | |||
1621 | printStreamNotPresent("Publics"); | |||
1622 | return Error::success(); | |||
1623 | } | |||
1624 | ||||
1625 | AutoIndent Indent(P); | |||
1626 | ExitOnError Err("Error dumping publics stream: "); | |||
1627 | auto &Publics = Err(getPdb().getPDBPublicsStream()); | |||
1628 | ||||
1629 | const GSIHashTable &PublicsTable = Publics.getPublicsTable(); | |||
1630 | if (opts::dump::DumpPublicExtras) { | |||
1631 | P.printLine("Publics Header"); | |||
1632 | AutoIndent Indent(P); | |||
1633 | P.formatLine("sym hash = {0}, thunk table addr = {1}", Publics.getSymHash(), | |||
1634 | formatSegmentOffset(Publics.getThunkTableSection(), | |||
1635 | Publics.getThunkTableOffset())); | |||
1636 | } | |||
1637 | Err(dumpSymbolsFromGSI(PublicsTable, opts::dump::DumpPublicExtras)); | |||
1638 | ||||
1639 | // Skip the rest if we aren't dumping extras. | |||
1640 | if (!opts::dump::DumpPublicExtras) | |||
1641 | return Error::success(); | |||
1642 | ||||
1643 | P.formatLine("Address Map"); | |||
1644 | { | |||
1645 | // These are offsets into the publics stream sorted by secidx:secrel. | |||
1646 | AutoIndent Indent2(P); | |||
1647 | for (uint32_t Addr : Publics.getAddressMap()) | |||
1648 | P.formatLine("off = {0}", Addr); | |||
1649 | } | |||
1650 | ||||
1651 | // The thunk map is optional debug info used for ILT thunks. | |||
1652 | if (!Publics.getThunkMap().empty()) { | |||
1653 | P.formatLine("Thunk Map"); | |||
1654 | AutoIndent Indent2(P); | |||
1655 | for (uint32_t Addr : Publics.getThunkMap()) | |||
1656 | P.formatLine("{0:x8}", Addr); | |||
1657 | } | |||
1658 | ||||
1659 | // The section offsets table appears to be empty when incremental linking | |||
1660 | // isn't in use. | |||
1661 | if (!Publics.getSectionOffsets().empty()) { | |||
1662 | P.formatLine("Section Offsets"); | |||
1663 | AutoIndent Indent2(P); | |||
1664 | for (const SectionOffset &SO : Publics.getSectionOffsets()) | |||
1665 | P.formatLine("{0:x4}:{1:x8}", uint16_t(SO.Isect), uint32_t(SO.Off)); | |||
1666 | } | |||
1667 | ||||
1668 | return Error::success(); | |||
1669 | } | |||
1670 | ||||
1671 | Error DumpOutputStyle::dumpSymbolsFromGSI(const GSIHashTable &Table, | |||
1672 | bool HashExtras) { | |||
1673 | auto ExpectedSyms = getPdb().getPDBSymbolStream(); | |||
1674 | if (!ExpectedSyms) | |||
1675 | return ExpectedSyms.takeError(); | |||
1676 | auto &Types = File.types(); | |||
1677 | auto &Ids = File.ids(); | |||
1678 | ||||
1679 | if (HashExtras) { | |||
1680 | P.printLine("GSI Header"); | |||
1681 | AutoIndent Indent(P); | |||
1682 | P.formatLine("sig = {0:X}, hdr = {1:X}, hr size = {2}, num buckets = {3}", | |||
1683 | Table.getVerSignature(), Table.getVerHeader(), | |||
1684 | Table.getHashRecordSize(), Table.getNumBuckets()); | |||
1685 | } | |||
1686 | ||||
1687 | { | |||
1688 | P.printLine("Records"); | |||
1689 | SymbolVisitorCallbackPipeline Pipeline; | |||
1690 | SymbolDeserializer Deserializer(nullptr, CodeViewContainer::Pdb); | |||
1691 | MinimalSymbolDumper Dumper(P, opts::dump::DumpSymRecordBytes, Ids, Types); | |||
1692 | ||||
1693 | Pipeline.addCallbackToPipeline(Deserializer); | |||
1694 | Pipeline.addCallbackToPipeline(Dumper); | |||
1695 | CVSymbolVisitor Visitor(Pipeline); | |||
1696 | ||||
1697 | ||||
1698 | BinaryStreamRef SymStream = | |||
1699 | ExpectedSyms->getSymbolArray().getUnderlyingStream(); | |||
1700 | for (uint32_t PubSymOff : Table) { | |||
1701 | Expected<CVSymbol> Sym = readSymbolFromStream(SymStream, PubSymOff); | |||
1702 | if (!Sym) | |||
1703 | return Sym.takeError(); | |||
1704 | if (auto E = Visitor.visitSymbolRecord(*Sym, PubSymOff)) | |||
1705 | return E; | |||
1706 | } | |||
1707 | } | |||
1708 | ||||
1709 | // Return early if we aren't dumping public hash table and address map info. | |||
1710 | if (HashExtras) { | |||
1711 | P.formatLine("Hash Entries"); | |||
1712 | { | |||
1713 | AutoIndent Indent2(P); | |||
1714 | for (const PSHashRecord &HR : Table.HashRecords) | |||
1715 | P.formatLine("off = {0}, refcnt = {1}", uint32_t(HR.Off), | |||
1716 | uint32_t(HR.CRef)); | |||
1717 | } | |||
1718 | ||||
1719 | P.formatLine("Hash Buckets"); | |||
1720 | { | |||
1721 | AutoIndent Indent2(P); | |||
1722 | for (uint32_t Hash : Table.HashBuckets) | |||
1723 | P.formatLine("{0:x8}", Hash); | |||
1724 | } | |||
1725 | } | |||
1726 | ||||
1727 | return Error::success(); | |||
1728 | } | |||
1729 | ||||
1730 | static std::string formatSegMapDescriptorFlag(uint32_t IndentLevel, | |||
1731 | OMFSegDescFlags Flags) { | |||
1732 | std::vector<std::string> Opts; | |||
1733 | if (Flags == OMFSegDescFlags::None) | |||
1734 | return "none"; | |||
1735 | ||||
1736 | PUSH_FLAG(OMFSegDescFlags, Read, Flags, "read")if (OMFSegDescFlags::Read == (Flags & OMFSegDescFlags::Read )) Opts.push_back("read");; | |||
1737 | PUSH_FLAG(OMFSegDescFlags, Write, Flags, "write")if (OMFSegDescFlags::Write == (Flags & OMFSegDescFlags::Write )) Opts.push_back("write");; | |||
1738 | PUSH_FLAG(OMFSegDescFlags, Execute, Flags, "execute")if (OMFSegDescFlags::Execute == (Flags & OMFSegDescFlags:: Execute)) Opts.push_back("execute");; | |||
1739 | PUSH_FLAG(OMFSegDescFlags, AddressIs32Bit, Flags, "32 bit addr")if (OMFSegDescFlags::AddressIs32Bit == (Flags & OMFSegDescFlags ::AddressIs32Bit)) Opts.push_back("32 bit addr");; | |||
1740 | PUSH_FLAG(OMFSegDescFlags, IsSelector, Flags, "selector")if (OMFSegDescFlags::IsSelector == (Flags & OMFSegDescFlags ::IsSelector)) Opts.push_back("selector");; | |||
1741 | PUSH_FLAG(OMFSegDescFlags, IsAbsoluteAddress, Flags, "absolute addr")if (OMFSegDescFlags::IsAbsoluteAddress == (Flags & OMFSegDescFlags ::IsAbsoluteAddress)) Opts.push_back("absolute addr");; | |||
1742 | PUSH_FLAG(OMFSegDescFlags, IsGroup, Flags, "group")if (OMFSegDescFlags::IsGroup == (Flags & OMFSegDescFlags:: IsGroup)) Opts.push_back("group");; | |||
1743 | return typesetItemList(Opts, IndentLevel, 4, " | "); | |||
1744 | } | |||
1745 | ||||
1746 | Error DumpOutputStyle::dumpSectionHeaders() { | |||
1747 | dumpSectionHeaders("Section Headers", DbgHeaderType::SectionHdr); | |||
1748 | dumpSectionHeaders("Original Section Headers", DbgHeaderType::SectionHdrOrig); | |||
1749 | return Error::success(); | |||
1750 | } | |||
1751 | ||||
1752 | void DumpOutputStyle::dumpSectionHeaders(StringRef Label, DbgHeaderType Type) { | |||
1753 | printHeader(P, Label); | |||
1754 | ||||
1755 | if (File.isObj()) { | |||
1756 | printStreamNotValidForObj(); | |||
1757 | return; | |||
1758 | } | |||
1759 | ||||
1760 | if (!getPdb().hasPDBDbiStream()) { | |||
1761 | printStreamNotPresent("DBI"); | |||
1762 | return; | |||
1763 | } | |||
1764 | ||||
1765 | AutoIndent Indent(P); | |||
1766 | ExitOnError Err("Error dumping section headers: "); | |||
1767 | std::unique_ptr<MappedBlockStream> Stream; | |||
1768 | ArrayRef<object::coff_section> Headers; | |||
1769 | auto ExpectedHeaders = loadSectionHeaders(getPdb(), Type); | |||
1770 | if (!ExpectedHeaders) { | |||
1771 | P.printLine(toString(ExpectedHeaders.takeError())); | |||
1772 | return; | |||
1773 | } | |||
1774 | std::tie(Stream, Headers) = std::move(*ExpectedHeaders); | |||
1775 | ||||
1776 | uint32_t I = 1; | |||
1777 | for (const auto &Header : Headers) { | |||
1778 | P.NewLine(); | |||
1779 | P.formatLine("SECTION HEADER #{0}", I); | |||
1780 | P.formatLine("{0,8} name", Header.Name); | |||
1781 | P.formatLine("{0,8:X-} virtual size", uint32_t(Header.VirtualSize)); | |||
1782 | P.formatLine("{0,8:X-} virtual address", uint32_t(Header.VirtualAddress)); | |||
1783 | P.formatLine("{0,8:X-} size of raw data", uint32_t(Header.SizeOfRawData)); | |||
1784 | P.formatLine("{0,8:X-} file pointer to raw data", | |||
1785 | uint32_t(Header.PointerToRawData)); | |||
1786 | P.formatLine("{0,8:X-} file pointer to relocation table", | |||
1787 | uint32_t(Header.PointerToRelocations)); | |||
1788 | P.formatLine("{0,8:X-} file pointer to line numbers", | |||
1789 | uint32_t(Header.PointerToLinenumbers)); | |||
1790 | P.formatLine("{0,8:X-} number of relocations", | |||
1791 | uint32_t(Header.NumberOfRelocations)); | |||
1792 | P.formatLine("{0,8:X-} number of line numbers", | |||
1793 | uint32_t(Header.NumberOfLinenumbers)); | |||
1794 | P.formatLine("{0,8:X-} flags", uint32_t(Header.Characteristics)); | |||
1795 | AutoIndent IndentMore(P, 9); | |||
1796 | P.formatLine("{0}", formatSectionCharacteristics( | |||
1797 | P.getIndentLevel(), Header.Characteristics, 1, "")); | |||
1798 | ++I; | |||
1799 | } | |||
1800 | return; | |||
1801 | } | |||
1802 | ||||
1803 | Error DumpOutputStyle::dumpSectionContribs() { | |||
1804 | printHeader(P, "Section Contributions"); | |||
1805 | ||||
1806 | if (File.isObj()) { | |||
1807 | printStreamNotValidForObj(); | |||
1808 | return Error::success(); | |||
1809 | } | |||
1810 | ||||
1811 | if (!getPdb().hasPDBDbiStream()) { | |||
1812 | printStreamNotPresent("DBI"); | |||
1813 | return Error::success(); | |||
1814 | } | |||
1815 | ||||
1816 | AutoIndent Indent(P); | |||
1817 | ExitOnError Err("Error dumping section contributions: "); | |||
1818 | ||||
1819 | auto &Dbi = Err(getPdb().getPDBDbiStream()); | |||
1820 | ||||
1821 | class Visitor : public ISectionContribVisitor { | |||
1822 | public: | |||
1823 | Visitor(LinePrinter &P, ArrayRef<std::string> Names) : P(P), Names(Names) { | |||
1824 | auto Max = std::max_element( | |||
1825 | Names.begin(), Names.end(), | |||
1826 | [](StringRef S1, StringRef S2) { return S1.size() < S2.size(); }); | |||
1827 | MaxNameLen = (Max == Names.end() ? 0 : Max->size()); | |||
1828 | } | |||
1829 | void visit(const SectionContrib &SC) override { | |||
1830 | dumpSectionContrib(P, SC, Names, MaxNameLen); | |||
1831 | } | |||
1832 | void visit(const SectionContrib2 &SC) override { | |||
1833 | dumpSectionContrib(P, SC, Names, MaxNameLen); | |||
1834 | } | |||
1835 | ||||
1836 | private: | |||
1837 | LinePrinter &P; | |||
1838 | uint32_t MaxNameLen; | |||
1839 | ArrayRef<std::string> Names; | |||
1840 | }; | |||
1841 | ||||
1842 | std::vector<std::string> Names = getSectionNames(getPdb()); | |||
1843 | Visitor V(P, makeArrayRef(Names)); | |||
1844 | Dbi.visitSectionContributions(V); | |||
1845 | return Error::success(); | |||
1846 | } | |||
1847 | ||||
1848 | Error DumpOutputStyle::dumpSectionMap() { | |||
1849 | printHeader(P, "Section Map"); | |||
1850 | ||||
1851 | if (File.isObj()) { | |||
1852 | printStreamNotValidForObj(); | |||
1853 | return Error::success(); | |||
1854 | } | |||
1855 | ||||
1856 | if (!getPdb().hasPDBDbiStream()) { | |||
1857 | printStreamNotPresent("DBI"); | |||
1858 | return Error::success(); | |||
1859 | } | |||
1860 | ||||
1861 | AutoIndent Indent(P); | |||
1862 | ExitOnError Err("Error dumping section map: "); | |||
1863 | ||||
1864 | auto &Dbi = Err(getPdb().getPDBDbiStream()); | |||
1865 | ||||
1866 | uint32_t I = 0; | |||
1867 | for (auto &M : Dbi.getSectionMap()) { | |||
1868 | P.formatLine( | |||
1869 | "Section {0:4} | ovl = {1}, group = {2}, frame = {3}, name = {4}", I, | |||
1870 | fmtle(M.Ovl), fmtle(M.Group), fmtle(M.Frame), fmtle(M.SecName)); | |||
1871 | P.formatLine(" class = {0}, offset = {1}, size = {2}", | |||
1872 | fmtle(M.ClassName), fmtle(M.Offset), fmtle(M.SecByteLength)); | |||
1873 | P.formatLine(" flags = {0}", | |||
1874 | formatSegMapDescriptorFlag( | |||
1875 | P.getIndentLevel() + 13, | |||
1876 | static_cast<OMFSegDescFlags>(uint16_t(M.Flags)))); | |||
1877 | ++I; | |||
1878 | } | |||
1879 | return Error::success(); | |||
1880 | } |
1 | //===- llvm/Support/Error.h - Recoverable error handling --------*- 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 | // This file defines an API used to report recoverable errors. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #ifndef LLVM_SUPPORT_ERROR_H | |||
15 | #define LLVM_SUPPORT_ERROR_H | |||
16 | ||||
17 | #include "llvm-c/Error.h" | |||
18 | #include "llvm/ADT/STLExtras.h" | |||
19 | #include "llvm/ADT/SmallVector.h" | |||
20 | #include "llvm/ADT/StringExtras.h" | |||
21 | #include "llvm/ADT/Twine.h" | |||
22 | #include "llvm/Config/abi-breaking.h" | |||
23 | #include "llvm/Support/AlignOf.h" | |||
24 | #include "llvm/Support/Compiler.h" | |||
25 | #include "llvm/Support/Debug.h" | |||
26 | #include "llvm/Support/ErrorHandling.h" | |||
27 | #include "llvm/Support/ErrorOr.h" | |||
28 | #include "llvm/Support/Format.h" | |||
29 | #include "llvm/Support/raw_ostream.h" | |||
30 | #include <algorithm> | |||
31 | #include <cassert> | |||
32 | #include <cstdint> | |||
33 | #include <cstdlib> | |||
34 | #include <functional> | |||
35 | #include <memory> | |||
36 | #include <new> | |||
37 | #include <string> | |||
38 | #include <system_error> | |||
39 | #include <type_traits> | |||
40 | #include <utility> | |||
41 | #include <vector> | |||
42 | ||||
43 | namespace llvm { | |||
44 | ||||
45 | class ErrorSuccess; | |||
46 | ||||
47 | /// Base class for error info classes. Do not extend this directly: Extend | |||
48 | /// the ErrorInfo template subclass instead. | |||
49 | class ErrorInfoBase { | |||
50 | public: | |||
51 | virtual ~ErrorInfoBase() = default; | |||
52 | ||||
53 | /// Print an error message to an output stream. | |||
54 | virtual void log(raw_ostream &OS) const = 0; | |||
55 | ||||
56 | /// Return the error message as a string. | |||
57 | virtual std::string message() const { | |||
58 | std::string Msg; | |||
59 | raw_string_ostream OS(Msg); | |||
60 | log(OS); | |||
61 | return OS.str(); | |||
62 | } | |||
63 | ||||
64 | /// Convert this error to a std::error_code. | |||
65 | /// | |||
66 | /// This is a temporary crutch to enable interaction with code still | |||
67 | /// using std::error_code. It will be removed in the future. | |||
68 | virtual std::error_code convertToErrorCode() const = 0; | |||
69 | ||||
70 | // Returns the class ID for this type. | |||
71 | static const void *classID() { return &ID; } | |||
72 | ||||
73 | // Returns the class ID for the dynamic type of this ErrorInfoBase instance. | |||
74 | virtual const void *dynamicClassID() const = 0; | |||
75 | ||||
76 | // Check whether this instance is a subclass of the class identified by | |||
77 | // ClassID. | |||
78 | virtual bool isA(const void *const ClassID) const { | |||
79 | return ClassID == classID(); | |||
80 | } | |||
81 | ||||
82 | // Check whether this instance is a subclass of ErrorInfoT. | |||
83 | template <typename ErrorInfoT> bool isA() const { | |||
84 | return isA(ErrorInfoT::classID()); | |||
85 | } | |||
86 | ||||
87 | private: | |||
88 | virtual void anchor(); | |||
89 | ||||
90 | static char ID; | |||
91 | }; | |||
92 | ||||
93 | /// Lightweight error class with error context and mandatory checking. | |||
94 | /// | |||
95 | /// Instances of this class wrap a ErrorInfoBase pointer. Failure states | |||
96 | /// are represented by setting the pointer to a ErrorInfoBase subclass | |||
97 | /// instance containing information describing the failure. Success is | |||
98 | /// represented by a null pointer value. | |||
99 | /// | |||
100 | /// Instances of Error also contains a 'Checked' flag, which must be set | |||
101 | /// before the destructor is called, otherwise the destructor will trigger a | |||
102 | /// runtime error. This enforces at runtime the requirement that all Error | |||
103 | /// instances be checked or returned to the caller. | |||
104 | /// | |||
105 | /// There are two ways to set the checked flag, depending on what state the | |||
106 | /// Error instance is in. For Error instances indicating success, it | |||
107 | /// is sufficient to invoke the boolean conversion operator. E.g.: | |||
108 | /// | |||
109 | /// @code{.cpp} | |||
110 | /// Error foo(<...>); | |||
111 | /// | |||
112 | /// if (auto E = foo(<...>)) | |||
113 | /// return E; // <- Return E if it is in the error state. | |||
114 | /// // We have verified that E was in the success state. It can now be safely | |||
115 | /// // destroyed. | |||
116 | /// @endcode | |||
117 | /// | |||
118 | /// A success value *can not* be dropped. For example, just calling 'foo(<...>)' | |||
119 | /// without testing the return value will raise a runtime error, even if foo | |||
120 | /// returns success. | |||
121 | /// | |||
122 | /// For Error instances representing failure, you must use either the | |||
123 | /// handleErrors or handleAllErrors function with a typed handler. E.g.: | |||
124 | /// | |||
125 | /// @code{.cpp} | |||
126 | /// class MyErrorInfo : public ErrorInfo<MyErrorInfo> { | |||
127 | /// // Custom error info. | |||
128 | /// }; | |||
129 | /// | |||
130 | /// Error foo(<...>) { return make_error<MyErrorInfo>(...); } | |||
131 | /// | |||
132 | /// auto E = foo(<...>); // <- foo returns failure with MyErrorInfo. | |||
133 | /// auto NewE = | |||
134 | /// handleErrors(E, | |||
135 | /// [](const MyErrorInfo &M) { | |||
136 | /// // Deal with the error. | |||
137 | /// }, | |||
138 | /// [](std::unique_ptr<OtherError> M) -> Error { | |||
139 | /// if (canHandle(*M)) { | |||
140 | /// // handle error. | |||
141 | /// return Error::success(); | |||
142 | /// } | |||
143 | /// // Couldn't handle this error instance. Pass it up the stack. | |||
144 | /// return Error(std::move(M)); | |||
145 | /// ); | |||
146 | /// // Note - we must check or return NewE in case any of the handlers | |||
147 | /// // returned a new error. | |||
148 | /// @endcode | |||
149 | /// | |||
150 | /// The handleAllErrors function is identical to handleErrors, except | |||
151 | /// that it has a void return type, and requires all errors to be handled and | |||
152 | /// no new errors be returned. It prevents errors (assuming they can all be | |||
153 | /// handled) from having to be bubbled all the way to the top-level. | |||
154 | /// | |||
155 | /// *All* Error instances must be checked before destruction, even if | |||
156 | /// they're moved-assigned or constructed from Success values that have already | |||
157 | /// been checked. This enforces checking through all levels of the call stack. | |||
158 | class LLVM_NODISCARD[[clang::warn_unused_result]] Error { | |||
159 | // Both ErrorList and FileError need to be able to yank ErrorInfoBase | |||
160 | // pointers out of this class to add to the error list. | |||
161 | friend class ErrorList; | |||
162 | friend class FileError; | |||
163 | ||||
164 | // handleErrors needs to be able to set the Checked flag. | |||
165 | template <typename... HandlerTs> | |||
166 | friend Error handleErrors(Error E, HandlerTs &&... Handlers); | |||
167 | ||||
168 | // Expected<T> needs to be able to steal the payload when constructed from an | |||
169 | // error. | |||
170 | template <typename T> friend class Expected; | |||
171 | ||||
172 | // wrap needs to be able to steal the payload. | |||
173 | friend LLVMErrorRef wrap(Error); | |||
174 | ||||
175 | protected: | |||
176 | /// Create a success value. Prefer using 'Error::success()' for readability | |||
177 | Error() { | |||
178 | setPtr(nullptr); | |||
179 | setChecked(false); | |||
180 | } | |||
181 | ||||
182 | public: | |||
183 | /// Create a success value. | |||
184 | static ErrorSuccess success(); | |||
185 | ||||
186 | // Errors are not copy-constructable. | |||
187 | Error(const Error &Other) = delete; | |||
188 | ||||
189 | /// Move-construct an error value. The newly constructed error is considered | |||
190 | /// unchecked, even if the source error had been checked. The original error | |||
191 | /// becomes a checked Success value, regardless of its original state. | |||
192 | Error(Error &&Other) { | |||
193 | setChecked(true); | |||
194 | *this = std::move(Other); | |||
195 | } | |||
196 | ||||
197 | /// Create an error value. Prefer using the 'make_error' function, but | |||
198 | /// this constructor can be useful when "re-throwing" errors from handlers. | |||
199 | Error(std::unique_ptr<ErrorInfoBase> Payload) { | |||
200 | setPtr(Payload.release()); | |||
201 | setChecked(false); | |||
| ||||
202 | } | |||
203 | ||||
204 | // Errors are not copy-assignable. | |||
205 | Error &operator=(const Error &Other) = delete; | |||
206 | ||||
207 | /// Move-assign an error value. The current error must represent success, you | |||
208 | /// you cannot overwrite an unhandled error. The current error is then | |||
209 | /// considered unchecked. The source error becomes a checked success value, | |||
210 | /// regardless of its original state. | |||
211 | Error &operator=(Error &&Other) { | |||
212 | // Don't allow overwriting of unchecked values. | |||
213 | assertIsChecked(); | |||
214 | setPtr(Other.getPtr()); | |||
215 | ||||
216 | // This Error is unchecked, even if the source error was checked. | |||
217 | setChecked(false); | |||
218 | ||||
219 | // Null out Other's payload and set its checked bit. | |||
220 | Other.setPtr(nullptr); | |||
221 | Other.setChecked(true); | |||
222 | ||||
223 | return *this; | |||
224 | } | |||
225 | ||||
226 | /// Destroy a Error. Fails with a call to abort() if the error is | |||
227 | /// unchecked. | |||
228 | ~Error() { | |||
229 | assertIsChecked(); | |||
230 | delete getPtr(); | |||
231 | } | |||
232 | ||||
233 | /// Bool conversion. Returns true if this Error is in a failure state, | |||
234 | /// and false if it is in an accept state. If the error is in a Success state | |||
235 | /// it will be considered checked. | |||
236 | explicit operator bool() { | |||
237 | setChecked(getPtr() == nullptr); | |||
238 | return getPtr() != nullptr; | |||
239 | } | |||
240 | ||||
241 | /// Check whether one error is a subclass of another. | |||
242 | template <typename ErrT> bool isA() const { | |||
243 | return getPtr() && getPtr()->isA(ErrT::classID()); | |||
244 | } | |||
245 | ||||
246 | /// Returns the dynamic class id of this error, or null if this is a success | |||
247 | /// value. | |||
248 | const void* dynamicClassID() const { | |||
249 | if (!getPtr()) | |||
250 | return nullptr; | |||
251 | return getPtr()->dynamicClassID(); | |||
252 | } | |||
253 | ||||
254 | private: | |||
255 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
256 | // assertIsChecked() happens very frequently, but under normal circumstances | |||
257 | // is supposed to be a no-op. So we want it to be inlined, but having a bunch | |||
258 | // of debug prints can cause the function to be too large for inlining. So | |||
259 | // it's important that we define this function out of line so that it can't be | |||
260 | // inlined. | |||
261 | LLVM_ATTRIBUTE_NORETURN__attribute__((noreturn)) | |||
262 | void fatalUncheckedError() const; | |||
263 | #endif | |||
264 | ||||
265 | void assertIsChecked() { | |||
266 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
267 | if (LLVM_UNLIKELY(!getChecked() || getPtr())__builtin_expect((bool)(!getChecked() || getPtr()), false)) | |||
268 | fatalUncheckedError(); | |||
269 | #endif | |||
270 | } | |||
271 | ||||
272 | ErrorInfoBase *getPtr() const { | |||
273 | return reinterpret_cast<ErrorInfoBase*>( | |||
274 | reinterpret_cast<uintptr_t>(Payload) & | |||
275 | ~static_cast<uintptr_t>(0x1)); | |||
276 | } | |||
277 | ||||
278 | void setPtr(ErrorInfoBase *EI) { | |||
279 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
280 | Payload = reinterpret_cast<ErrorInfoBase*>( | |||
281 | (reinterpret_cast<uintptr_t>(EI) & | |||
282 | ~static_cast<uintptr_t>(0x1)) | | |||
283 | (reinterpret_cast<uintptr_t>(Payload) & 0x1)); | |||
284 | #else | |||
285 | Payload = EI; | |||
286 | #endif | |||
287 | } | |||
288 | ||||
289 | bool getChecked() const { | |||
290 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
291 | return (reinterpret_cast<uintptr_t>(Payload) & 0x1) == 0; | |||
292 | #else | |||
293 | return true; | |||
294 | #endif | |||
295 | } | |||
296 | ||||
297 | void setChecked(bool V) { | |||
298 | Payload = reinterpret_cast<ErrorInfoBase*>( | |||
299 | (reinterpret_cast<uintptr_t>(Payload) & | |||
300 | ~static_cast<uintptr_t>(0x1)) | | |||
301 | (V ? 0 : 1)); | |||
302 | } | |||
303 | ||||
304 | std::unique_ptr<ErrorInfoBase> takePayload() { | |||
305 | std::unique_ptr<ErrorInfoBase> Tmp(getPtr()); | |||
306 | setPtr(nullptr); | |||
307 | setChecked(true); | |||
308 | return Tmp; | |||
309 | } | |||
310 | ||||
311 | friend raw_ostream &operator<<(raw_ostream &OS, const Error &E) { | |||
312 | if (auto P = E.getPtr()) | |||
313 | P->log(OS); | |||
314 | else | |||
315 | OS << "success"; | |||
316 | return OS; | |||
317 | } | |||
318 | ||||
319 | ErrorInfoBase *Payload = nullptr; | |||
320 | }; | |||
321 | ||||
322 | /// Subclass of Error for the sole purpose of identifying the success path in | |||
323 | /// the type system. This allows to catch invalid conversion to Expected<T> at | |||
324 | /// compile time. | |||
325 | class ErrorSuccess final : public Error {}; | |||
326 | ||||
327 | inline ErrorSuccess Error::success() { return ErrorSuccess(); } | |||
328 | ||||
329 | /// Make a Error instance representing failure using the given error info | |||
330 | /// type. | |||
331 | template <typename ErrT, typename... ArgTs> Error make_error(ArgTs &&... Args) { | |||
332 | return Error(llvm::make_unique<ErrT>(std::forward<ArgTs>(Args)...)); | |||
333 | } | |||
334 | ||||
335 | /// Base class for user error types. Users should declare their error types | |||
336 | /// like: | |||
337 | /// | |||
338 | /// class MyError : public ErrorInfo<MyError> { | |||
339 | /// .... | |||
340 | /// }; | |||
341 | /// | |||
342 | /// This class provides an implementation of the ErrorInfoBase::kind | |||
343 | /// method, which is used by the Error RTTI system. | |||
344 | template <typename ThisErrT, typename ParentErrT = ErrorInfoBase> | |||
345 | class ErrorInfo : public ParentErrT { | |||
346 | public: | |||
347 | using ParentErrT::ParentErrT; // inherit constructors | |||
348 | ||||
349 | static const void *classID() { return &ThisErrT::ID; } | |||
350 | ||||
351 | const void *dynamicClassID() const override { return &ThisErrT::ID; } | |||
352 | ||||
353 | bool isA(const void *const ClassID) const override { | |||
354 | return ClassID == classID() || ParentErrT::isA(ClassID); | |||
355 | } | |||
356 | }; | |||
357 | ||||
358 | /// Special ErrorInfo subclass representing a list of ErrorInfos. | |||
359 | /// Instances of this class are constructed by joinError. | |||
360 | class ErrorList final : public ErrorInfo<ErrorList> { | |||
361 | // handleErrors needs to be able to iterate the payload list of an | |||
362 | // ErrorList. | |||
363 | template <typename... HandlerTs> | |||
364 | friend Error handleErrors(Error E, HandlerTs &&... Handlers); | |||
365 | ||||
366 | // joinErrors is implemented in terms of join. | |||
367 | friend Error joinErrors(Error, Error); | |||
368 | ||||
369 | public: | |||
370 | void log(raw_ostream &OS) const override { | |||
371 | OS << "Multiple errors:\n"; | |||
372 | for (auto &ErrPayload : Payloads) { | |||
373 | ErrPayload->log(OS); | |||
374 | OS << "\n"; | |||
375 | } | |||
376 | } | |||
377 | ||||
378 | std::error_code convertToErrorCode() const override; | |||
379 | ||||
380 | // Used by ErrorInfo::classID. | |||
381 | static char ID; | |||
382 | ||||
383 | private: | |||
384 | ErrorList(std::unique_ptr<ErrorInfoBase> Payload1, | |||
385 | std::unique_ptr<ErrorInfoBase> Payload2) { | |||
386 | assert(!Payload1->isA<ErrorList>() && !Payload2->isA<ErrorList>() &&((!Payload1->isA<ErrorList>() && !Payload2-> isA<ErrorList>() && "ErrorList constructor payloads should be singleton errors" ) ? static_cast<void> (0) : __assert_fail ("!Payload1->isA<ErrorList>() && !Payload2->isA<ErrorList>() && \"ErrorList constructor payloads should be singleton errors\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 387, __PRETTY_FUNCTION__)) | |||
387 | "ErrorList constructor payloads should be singleton errors")((!Payload1->isA<ErrorList>() && !Payload2-> isA<ErrorList>() && "ErrorList constructor payloads should be singleton errors" ) ? static_cast<void> (0) : __assert_fail ("!Payload1->isA<ErrorList>() && !Payload2->isA<ErrorList>() && \"ErrorList constructor payloads should be singleton errors\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 387, __PRETTY_FUNCTION__)); | |||
388 | Payloads.push_back(std::move(Payload1)); | |||
389 | Payloads.push_back(std::move(Payload2)); | |||
390 | } | |||
391 | ||||
392 | static Error join(Error E1, Error E2) { | |||
393 | if (!E1) | |||
394 | return E2; | |||
395 | if (!E2) | |||
396 | return E1; | |||
397 | if (E1.isA<ErrorList>()) { | |||
398 | auto &E1List = static_cast<ErrorList &>(*E1.getPtr()); | |||
399 | if (E2.isA<ErrorList>()) { | |||
400 | auto E2Payload = E2.takePayload(); | |||
401 | auto &E2List = static_cast<ErrorList &>(*E2Payload); | |||
402 | for (auto &Payload : E2List.Payloads) | |||
403 | E1List.Payloads.push_back(std::move(Payload)); | |||
404 | } else | |||
405 | E1List.Payloads.push_back(E2.takePayload()); | |||
406 | ||||
407 | return E1; | |||
408 | } | |||
409 | if (E2.isA<ErrorList>()) { | |||
410 | auto &E2List = static_cast<ErrorList &>(*E2.getPtr()); | |||
411 | E2List.Payloads.insert(E2List.Payloads.begin(), E1.takePayload()); | |||
412 | return E2; | |||
413 | } | |||
414 | return Error(std::unique_ptr<ErrorList>( | |||
415 | new ErrorList(E1.takePayload(), E2.takePayload()))); | |||
416 | } | |||
417 | ||||
418 | std::vector<std::unique_ptr<ErrorInfoBase>> Payloads; | |||
419 | }; | |||
420 | ||||
421 | /// Concatenate errors. The resulting Error is unchecked, and contains the | |||
422 | /// ErrorInfo(s), if any, contained in E1, followed by the | |||
423 | /// ErrorInfo(s), if any, contained in E2. | |||
424 | inline Error joinErrors(Error E1, Error E2) { | |||
425 | return ErrorList::join(std::move(E1), std::move(E2)); | |||
426 | } | |||
427 | ||||
428 | /// Tagged union holding either a T or a Error. | |||
429 | /// | |||
430 | /// This class parallels ErrorOr, but replaces error_code with Error. Since | |||
431 | /// Error cannot be copied, this class replaces getError() with | |||
432 | /// takeError(). It also adds an bool errorIsA<ErrT>() method for testing the | |||
433 | /// error class type. | |||
434 | template <class T> class LLVM_NODISCARD[[clang::warn_unused_result]] Expected { | |||
435 | template <class T1> friend class ExpectedAsOutParameter; | |||
436 | template <class OtherT> friend class Expected; | |||
437 | ||||
438 | static const bool isRef = std::is_reference<T>::value; | |||
439 | ||||
440 | using wrap = std::reference_wrapper<typename std::remove_reference<T>::type>; | |||
441 | ||||
442 | using error_type = std::unique_ptr<ErrorInfoBase>; | |||
443 | ||||
444 | public: | |||
445 | using storage_type = typename std::conditional<isRef, wrap, T>::type; | |||
446 | using value_type = T; | |||
447 | ||||
448 | private: | |||
449 | using reference = typename std::remove_reference<T>::type &; | |||
450 | using const_reference = const typename std::remove_reference<T>::type &; | |||
451 | using pointer = typename std::remove_reference<T>::type *; | |||
452 | using const_pointer = const typename std::remove_reference<T>::type *; | |||
453 | ||||
454 | public: | |||
455 | /// Create an Expected<T> error value from the given Error. | |||
456 | Expected(Error Err) | |||
457 | : HasError(true) | |||
458 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
459 | // Expected is unchecked upon construction in Debug builds. | |||
460 | , Unchecked(true) | |||
461 | #endif | |||
462 | { | |||
463 | assert(Err && "Cannot create Expected<T> from Error success value.")((Err && "Cannot create Expected<T> from Error success value." ) ? static_cast<void> (0) : __assert_fail ("Err && \"Cannot create Expected<T> from Error success value.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 463, __PRETTY_FUNCTION__)); | |||
464 | new (getErrorStorage()) error_type(Err.takePayload()); | |||
465 | } | |||
466 | ||||
467 | /// Forbid to convert from Error::success() implicitly, this avoids having | |||
468 | /// Expected<T> foo() { return Error::success(); } which compiles otherwise | |||
469 | /// but triggers the assertion above. | |||
470 | Expected(ErrorSuccess) = delete; | |||
471 | ||||
472 | /// Create an Expected<T> success value from the given OtherT value, which | |||
473 | /// must be convertible to T. | |||
474 | template <typename OtherT> | |||
475 | Expected(OtherT &&Val, | |||
476 | typename std::enable_if<std::is_convertible<OtherT, T>::value>::type | |||
477 | * = nullptr) | |||
478 | : HasError(false) | |||
479 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
480 | // Expected is unchecked upon construction in Debug builds. | |||
481 | , Unchecked(true) | |||
482 | #endif | |||
483 | { | |||
484 | new (getStorage()) storage_type(std::forward<OtherT>(Val)); | |||
485 | } | |||
486 | ||||
487 | /// Move construct an Expected<T> value. | |||
488 | Expected(Expected &&Other) { moveConstruct(std::move(Other)); } | |||
489 | ||||
490 | /// Move construct an Expected<T> value from an Expected<OtherT>, where OtherT | |||
491 | /// must be convertible to T. | |||
492 | template <class OtherT> | |||
493 | Expected(Expected<OtherT> &&Other, | |||
494 | typename std::enable_if<std::is_convertible<OtherT, T>::value>::type | |||
495 | * = nullptr) { | |||
496 | moveConstruct(std::move(Other)); | |||
497 | } | |||
498 | ||||
499 | /// Move construct an Expected<T> value from an Expected<OtherT>, where OtherT | |||
500 | /// isn't convertible to T. | |||
501 | template <class OtherT> | |||
502 | explicit Expected( | |||
503 | Expected<OtherT> &&Other, | |||
504 | typename std::enable_if<!std::is_convertible<OtherT, T>::value>::type * = | |||
505 | nullptr) { | |||
506 | moveConstruct(std::move(Other)); | |||
507 | } | |||
508 | ||||
509 | /// Move-assign from another Expected<T>. | |||
510 | Expected &operator=(Expected &&Other) { | |||
511 | moveAssign(std::move(Other)); | |||
512 | return *this; | |||
513 | } | |||
514 | ||||
515 | /// Destroy an Expected<T>. | |||
516 | ~Expected() { | |||
517 | assertIsChecked(); | |||
518 | if (!HasError) | |||
519 | getStorage()->~storage_type(); | |||
520 | else | |||
521 | getErrorStorage()->~error_type(); | |||
522 | } | |||
523 | ||||
524 | /// Return false if there is an error. | |||
525 | explicit operator bool() { | |||
526 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
527 | Unchecked = HasError; | |||
528 | #endif | |||
529 | return !HasError; | |||
530 | } | |||
531 | ||||
532 | /// Returns a reference to the stored T value. | |||
533 | reference get() { | |||
534 | assertIsChecked(); | |||
535 | return *getStorage(); | |||
536 | } | |||
537 | ||||
538 | /// Returns a const reference to the stored T value. | |||
539 | const_reference get() const { | |||
540 | assertIsChecked(); | |||
541 | return const_cast<Expected<T> *>(this)->get(); | |||
542 | } | |||
543 | ||||
544 | /// Check that this Expected<T> is an error of type ErrT. | |||
545 | template <typename ErrT> bool errorIsA() const { | |||
546 | return HasError && (*getErrorStorage())->template isA<ErrT>(); | |||
547 | } | |||
548 | ||||
549 | /// Take ownership of the stored error. | |||
550 | /// After calling this the Expected<T> is in an indeterminate state that can | |||
551 | /// only be safely destructed. No further calls (beside the destructor) should | |||
552 | /// be made on the Expected<T> vaule. | |||
553 | Error takeError() { | |||
554 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
555 | Unchecked = false; | |||
556 | #endif | |||
557 | return HasError ? Error(std::move(*getErrorStorage())) : Error::success(); | |||
558 | } | |||
559 | ||||
560 | /// Returns a pointer to the stored T value. | |||
561 | pointer operator->() { | |||
562 | assertIsChecked(); | |||
563 | return toPointer(getStorage()); | |||
564 | } | |||
565 | ||||
566 | /// Returns a const pointer to the stored T value. | |||
567 | const_pointer operator->() const { | |||
568 | assertIsChecked(); | |||
569 | return toPointer(getStorage()); | |||
570 | } | |||
571 | ||||
572 | /// Returns a reference to the stored T value. | |||
573 | reference operator*() { | |||
574 | assertIsChecked(); | |||
575 | return *getStorage(); | |||
576 | } | |||
577 | ||||
578 | /// Returns a const reference to the stored T value. | |||
579 | const_reference operator*() const { | |||
580 | assertIsChecked(); | |||
581 | return *getStorage(); | |||
582 | } | |||
583 | ||||
584 | private: | |||
585 | template <class T1> | |||
586 | static bool compareThisIfSameType(const T1 &a, const T1 &b) { | |||
587 | return &a == &b; | |||
588 | } | |||
589 | ||||
590 | template <class T1, class T2> | |||
591 | static bool compareThisIfSameType(const T1 &a, const T2 &b) { | |||
592 | return false; | |||
593 | } | |||
594 | ||||
595 | template <class OtherT> void moveConstruct(Expected<OtherT> &&Other) { | |||
596 | HasError = Other.HasError; | |||
597 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
598 | Unchecked = true; | |||
599 | Other.Unchecked = false; | |||
600 | #endif | |||
601 | ||||
602 | if (!HasError) | |||
603 | new (getStorage()) storage_type(std::move(*Other.getStorage())); | |||
604 | else | |||
605 | new (getErrorStorage()) error_type(std::move(*Other.getErrorStorage())); | |||
606 | } | |||
607 | ||||
608 | template <class OtherT> void moveAssign(Expected<OtherT> &&Other) { | |||
609 | assertIsChecked(); | |||
610 | ||||
611 | if (compareThisIfSameType(*this, Other)) | |||
612 | return; | |||
613 | ||||
614 | this->~Expected(); | |||
615 | new (this) Expected(std::move(Other)); | |||
616 | } | |||
617 | ||||
618 | pointer toPointer(pointer Val) { return Val; } | |||
619 | ||||
620 | const_pointer toPointer(const_pointer Val) const { return Val; } | |||
621 | ||||
622 | pointer toPointer(wrap *Val) { return &Val->get(); } | |||
623 | ||||
624 | const_pointer toPointer(const wrap *Val) const { return &Val->get(); } | |||
625 | ||||
626 | storage_type *getStorage() { | |||
627 | assert(!HasError && "Cannot get value when an error exists!")((!HasError && "Cannot get value when an error exists!" ) ? static_cast<void> (0) : __assert_fail ("!HasError && \"Cannot get value when an error exists!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 627, __PRETTY_FUNCTION__)); | |||
628 | return reinterpret_cast<storage_type *>(TStorage.buffer); | |||
629 | } | |||
630 | ||||
631 | const storage_type *getStorage() const { | |||
632 | assert(!HasError && "Cannot get value when an error exists!")((!HasError && "Cannot get value when an error exists!" ) ? static_cast<void> (0) : __assert_fail ("!HasError && \"Cannot get value when an error exists!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 632, __PRETTY_FUNCTION__)); | |||
633 | return reinterpret_cast<const storage_type *>(TStorage.buffer); | |||
634 | } | |||
635 | ||||
636 | error_type *getErrorStorage() { | |||
637 | assert(HasError && "Cannot get error when a value exists!")((HasError && "Cannot get error when a value exists!" ) ? static_cast<void> (0) : __assert_fail ("HasError && \"Cannot get error when a value exists!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 637, __PRETTY_FUNCTION__)); | |||
638 | return reinterpret_cast<error_type *>(ErrorStorage.buffer); | |||
639 | } | |||
640 | ||||
641 | const error_type *getErrorStorage() const { | |||
642 | assert(HasError && "Cannot get error when a value exists!")((HasError && "Cannot get error when a value exists!" ) ? static_cast<void> (0) : __assert_fail ("HasError && \"Cannot get error when a value exists!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 642, __PRETTY_FUNCTION__)); | |||
643 | return reinterpret_cast<const error_type *>(ErrorStorage.buffer); | |||
644 | } | |||
645 | ||||
646 | // Used by ExpectedAsOutParameter to reset the checked flag. | |||
647 | void setUnchecked() { | |||
648 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
649 | Unchecked = true; | |||
650 | #endif | |||
651 | } | |||
652 | ||||
653 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
654 | LLVM_ATTRIBUTE_NORETURN__attribute__((noreturn)) | |||
655 | LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline)) | |||
656 | void fatalUncheckedExpected() const { | |||
657 | dbgs() << "Expected<T> must be checked before access or destruction.\n"; | |||
658 | if (HasError) { | |||
659 | dbgs() << "Unchecked Expected<T> contained error:\n"; | |||
660 | (*getErrorStorage())->log(dbgs()); | |||
661 | } else | |||
662 | dbgs() << "Expected<T> value was in success state. (Note: Expected<T> " | |||
663 | "values in success mode must still be checked prior to being " | |||
664 | "destroyed).\n"; | |||
665 | abort(); | |||
666 | } | |||
667 | #endif | |||
668 | ||||
669 | void assertIsChecked() { | |||
670 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
671 | if (LLVM_UNLIKELY(Unchecked)__builtin_expect((bool)(Unchecked), false)) | |||
672 | fatalUncheckedExpected(); | |||
673 | #endif | |||
674 | } | |||
675 | ||||
676 | union { | |||
677 | AlignedCharArrayUnion<storage_type> TStorage; | |||
678 | AlignedCharArrayUnion<error_type> ErrorStorage; | |||
679 | }; | |||
680 | bool HasError : 1; | |||
681 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 | |||
682 | bool Unchecked : 1; | |||
683 | #endif | |||
684 | }; | |||
685 | ||||
686 | /// Report a serious error, calling any installed error handler. See | |||
687 | /// ErrorHandling.h. | |||
688 | LLVM_ATTRIBUTE_NORETURN__attribute__((noreturn)) void report_fatal_error(Error Err, | |||
689 | bool gen_crash_diag = true); | |||
690 | ||||
691 | /// Report a fatal error if Err is a failure value. | |||
692 | /// | |||
693 | /// This function can be used to wrap calls to fallible functions ONLY when it | |||
694 | /// is known that the Error will always be a success value. E.g. | |||
695 | /// | |||
696 | /// @code{.cpp} | |||
697 | /// // foo only attempts the fallible operation if DoFallibleOperation is | |||
698 | /// // true. If DoFallibleOperation is false then foo always returns | |||
699 | /// // Error::success(). | |||
700 | /// Error foo(bool DoFallibleOperation); | |||
701 | /// | |||
702 | /// cantFail(foo(false)); | |||
703 | /// @endcode | |||
704 | inline void cantFail(Error Err, const char *Msg = nullptr) { | |||
705 | if (Err) { | |||
706 | if (!Msg) | |||
707 | Msg = "Failure value returned from cantFail wrapped call"; | |||
708 | llvm_unreachable(Msg)::llvm::llvm_unreachable_internal(Msg, "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 708); | |||
709 | } | |||
710 | } | |||
711 | ||||
712 | /// Report a fatal error if ValOrErr is a failure value, otherwise unwraps and | |||
713 | /// returns the contained value. | |||
714 | /// | |||
715 | /// This function can be used to wrap calls to fallible functions ONLY when it | |||
716 | /// is known that the Error will always be a success value. E.g. | |||
717 | /// | |||
718 | /// @code{.cpp} | |||
719 | /// // foo only attempts the fallible operation if DoFallibleOperation is | |||
720 | /// // true. If DoFallibleOperation is false then foo always returns an int. | |||
721 | /// Expected<int> foo(bool DoFallibleOperation); | |||
722 | /// | |||
723 | /// int X = cantFail(foo(false)); | |||
724 | /// @endcode | |||
725 | template <typename T> | |||
726 | T cantFail(Expected<T> ValOrErr, const char *Msg = nullptr) { | |||
727 | if (ValOrErr) | |||
728 | return std::move(*ValOrErr); | |||
729 | else { | |||
730 | if (!Msg) | |||
731 | Msg = "Failure value returned from cantFail wrapped call"; | |||
732 | llvm_unreachable(Msg)::llvm::llvm_unreachable_internal(Msg, "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 732); | |||
733 | } | |||
734 | } | |||
735 | ||||
736 | /// Report a fatal error if ValOrErr is a failure value, otherwise unwraps and | |||
737 | /// returns the contained reference. | |||
738 | /// | |||
739 | /// This function can be used to wrap calls to fallible functions ONLY when it | |||
740 | /// is known that the Error will always be a success value. E.g. | |||
741 | /// | |||
742 | /// @code{.cpp} | |||
743 | /// // foo only attempts the fallible operation if DoFallibleOperation is | |||
744 | /// // true. If DoFallibleOperation is false then foo always returns a Bar&. | |||
745 | /// Expected<Bar&> foo(bool DoFallibleOperation); | |||
746 | /// | |||
747 | /// Bar &X = cantFail(foo(false)); | |||
748 | /// @endcode | |||
749 | template <typename T> | |||
750 | T& cantFail(Expected<T&> ValOrErr, const char *Msg = nullptr) { | |||
751 | if (ValOrErr) | |||
752 | return *ValOrErr; | |||
753 | else { | |||
754 | if (!Msg) | |||
755 | Msg = "Failure value returned from cantFail wrapped call"; | |||
756 | llvm_unreachable(Msg)::llvm::llvm_unreachable_internal(Msg, "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 756); | |||
757 | } | |||
758 | } | |||
759 | ||||
760 | /// Helper for testing applicability of, and applying, handlers for | |||
761 | /// ErrorInfo types. | |||
762 | template <typename HandlerT> | |||
763 | class ErrorHandlerTraits | |||
764 | : public ErrorHandlerTraits<decltype( | |||
765 | &std::remove_reference<HandlerT>::type::operator())> {}; | |||
766 | ||||
767 | // Specialization functions of the form 'Error (const ErrT&)'. | |||
768 | template <typename ErrT> class ErrorHandlerTraits<Error (&)(ErrT &)> { | |||
769 | public: | |||
770 | static bool appliesTo(const ErrorInfoBase &E) { | |||
771 | return E.template isA<ErrT>(); | |||
772 | } | |||
773 | ||||
774 | template <typename HandlerT> | |||
775 | static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) { | |||
776 | assert(appliesTo(*E) && "Applying incorrect handler")((appliesTo(*E) && "Applying incorrect handler") ? static_cast <void> (0) : __assert_fail ("appliesTo(*E) && \"Applying incorrect handler\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 776, __PRETTY_FUNCTION__)); | |||
777 | return H(static_cast<ErrT &>(*E)); | |||
778 | } | |||
779 | }; | |||
780 | ||||
781 | // Specialization functions of the form 'void (const ErrT&)'. | |||
782 | template <typename ErrT> class ErrorHandlerTraits<void (&)(ErrT &)> { | |||
783 | public: | |||
784 | static bool appliesTo(const ErrorInfoBase &E) { | |||
785 | return E.template isA<ErrT>(); | |||
786 | } | |||
787 | ||||
788 | template <typename HandlerT> | |||
789 | static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) { | |||
790 | assert(appliesTo(*E) && "Applying incorrect handler")((appliesTo(*E) && "Applying incorrect handler") ? static_cast <void> (0) : __assert_fail ("appliesTo(*E) && \"Applying incorrect handler\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 790, __PRETTY_FUNCTION__)); | |||
791 | H(static_cast<ErrT &>(*E)); | |||
792 | return Error::success(); | |||
793 | } | |||
794 | }; | |||
795 | ||||
796 | /// Specialization for functions of the form 'Error (std::unique_ptr<ErrT>)'. | |||
797 | template <typename ErrT> | |||
798 | class ErrorHandlerTraits<Error (&)(std::unique_ptr<ErrT>)> { | |||
799 | public: | |||
800 | static bool appliesTo(const ErrorInfoBase &E) { | |||
801 | return E.template isA<ErrT>(); | |||
802 | } | |||
803 | ||||
804 | template <typename HandlerT> | |||
805 | static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) { | |||
806 | assert(appliesTo(*E) && "Applying incorrect handler")((appliesTo(*E) && "Applying incorrect handler") ? static_cast <void> (0) : __assert_fail ("appliesTo(*E) && \"Applying incorrect handler\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 806, __PRETTY_FUNCTION__)); | |||
807 | std::unique_ptr<ErrT> SubE(static_cast<ErrT *>(E.release())); | |||
808 | return H(std::move(SubE)); | |||
809 | } | |||
810 | }; | |||
811 | ||||
812 | /// Specialization for functions of the form 'void (std::unique_ptr<ErrT>)'. | |||
813 | template <typename ErrT> | |||
814 | class ErrorHandlerTraits<void (&)(std::unique_ptr<ErrT>)> { | |||
815 | public: | |||
816 | static bool appliesTo(const ErrorInfoBase &E) { | |||
817 | return E.template isA<ErrT>(); | |||
818 | } | |||
819 | ||||
820 | template <typename HandlerT> | |||
821 | static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) { | |||
822 | assert(appliesTo(*E) && "Applying incorrect handler")((appliesTo(*E) && "Applying incorrect handler") ? static_cast <void> (0) : __assert_fail ("appliesTo(*E) && \"Applying incorrect handler\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 822, __PRETTY_FUNCTION__)); | |||
823 | std::unique_ptr<ErrT> SubE(static_cast<ErrT *>(E.release())); | |||
824 | H(std::move(SubE)); | |||
825 | return Error::success(); | |||
826 | } | |||
827 | }; | |||
828 | ||||
829 | // Specialization for member functions of the form 'RetT (const ErrT&)'. | |||
830 | template <typename C, typename RetT, typename ErrT> | |||
831 | class ErrorHandlerTraits<RetT (C::*)(ErrT &)> | |||
832 | : public ErrorHandlerTraits<RetT (&)(ErrT &)> {}; | |||
833 | ||||
834 | // Specialization for member functions of the form 'RetT (const ErrT&) const'. | |||
835 | template <typename C, typename RetT, typename ErrT> | |||
836 | class ErrorHandlerTraits<RetT (C::*)(ErrT &) const> | |||
837 | : public ErrorHandlerTraits<RetT (&)(ErrT &)> {}; | |||
838 | ||||
839 | // Specialization for member functions of the form 'RetT (const ErrT&)'. | |||
840 | template <typename C, typename RetT, typename ErrT> | |||
841 | class ErrorHandlerTraits<RetT (C::*)(const ErrT &)> | |||
842 | : public ErrorHandlerTraits<RetT (&)(ErrT &)> {}; | |||
843 | ||||
844 | // Specialization for member functions of the form 'RetT (const ErrT&) const'. | |||
845 | template <typename C, typename RetT, typename ErrT> | |||
846 | class ErrorHandlerTraits<RetT (C::*)(const ErrT &) const> | |||
847 | : public ErrorHandlerTraits<RetT (&)(ErrT &)> {}; | |||
848 | ||||
849 | /// Specialization for member functions of the form | |||
850 | /// 'RetT (std::unique_ptr<ErrT>)'. | |||
851 | template <typename C, typename RetT, typename ErrT> | |||
852 | class ErrorHandlerTraits<RetT (C::*)(std::unique_ptr<ErrT>)> | |||
853 | : public ErrorHandlerTraits<RetT (&)(std::unique_ptr<ErrT>)> {}; | |||
854 | ||||
855 | /// Specialization for member functions of the form | |||
856 | /// 'RetT (std::unique_ptr<ErrT>) const'. | |||
857 | template <typename C, typename RetT, typename ErrT> | |||
858 | class ErrorHandlerTraits<RetT (C::*)(std::unique_ptr<ErrT>) const> | |||
859 | : public ErrorHandlerTraits<RetT (&)(std::unique_ptr<ErrT>)> {}; | |||
860 | ||||
861 | inline Error handleErrorImpl(std::unique_ptr<ErrorInfoBase> Payload) { | |||
862 | return Error(std::move(Payload)); | |||
863 | } | |||
864 | ||||
865 | template <typename HandlerT, typename... HandlerTs> | |||
866 | Error handleErrorImpl(std::unique_ptr<ErrorInfoBase> Payload, | |||
867 | HandlerT &&Handler, HandlerTs &&... Handlers) { | |||
868 | if (ErrorHandlerTraits<HandlerT>::appliesTo(*Payload)) | |||
869 | return ErrorHandlerTraits<HandlerT>::apply(std::forward<HandlerT>(Handler), | |||
870 | std::move(Payload)); | |||
871 | return handleErrorImpl(std::move(Payload), | |||
872 | std::forward<HandlerTs>(Handlers)...); | |||
873 | } | |||
874 | ||||
875 | /// Pass the ErrorInfo(s) contained in E to their respective handlers. Any | |||
876 | /// unhandled errors (or Errors returned by handlers) are re-concatenated and | |||
877 | /// returned. | |||
878 | /// Because this function returns an error, its result must also be checked | |||
879 | /// or returned. If you intend to handle all errors use handleAllErrors | |||
880 | /// (which returns void, and will abort() on unhandled errors) instead. | |||
881 | template <typename... HandlerTs> | |||
882 | Error handleErrors(Error E, HandlerTs &&... Hs) { | |||
883 | if (!E) | |||
884 | return Error::success(); | |||
885 | ||||
886 | std::unique_ptr<ErrorInfoBase> Payload = E.takePayload(); | |||
887 | ||||
888 | if (Payload->isA<ErrorList>()) { | |||
889 | ErrorList &List = static_cast<ErrorList &>(*Payload); | |||
890 | Error R; | |||
891 | for (auto &P : List.Payloads) | |||
892 | R = ErrorList::join( | |||
893 | std::move(R), | |||
894 | handleErrorImpl(std::move(P), std::forward<HandlerTs>(Hs)...)); | |||
895 | return R; | |||
896 | } | |||
897 | ||||
898 | return handleErrorImpl(std::move(Payload), std::forward<HandlerTs>(Hs)...); | |||
899 | } | |||
900 | ||||
901 | /// Behaves the same as handleErrors, except that by contract all errors | |||
902 | /// *must* be handled by the given handlers (i.e. there must be no remaining | |||
903 | /// errors after running the handlers, or llvm_unreachable is called). | |||
904 | template <typename... HandlerTs> | |||
905 | void handleAllErrors(Error E, HandlerTs &&... Handlers) { | |||
906 | cantFail(handleErrors(std::move(E), std::forward<HandlerTs>(Handlers)...)); | |||
907 | } | |||
908 | ||||
909 | /// Check that E is a non-error, then drop it. | |||
910 | /// If E is an error, llvm_unreachable will be called. | |||
911 | inline void handleAllErrors(Error E) { | |||
912 | cantFail(std::move(E)); | |||
913 | } | |||
914 | ||||
915 | /// Handle any errors (if present) in an Expected<T>, then try a recovery path. | |||
916 | /// | |||
917 | /// If the incoming value is a success value it is returned unmodified. If it | |||
918 | /// is a failure value then it the contained error is passed to handleErrors. | |||
919 | /// If handleErrors is able to handle the error then the RecoveryPath functor | |||
920 | /// is called to supply the final result. If handleErrors is not able to | |||
921 | /// handle all errors then the unhandled errors are returned. | |||
922 | /// | |||
923 | /// This utility enables the follow pattern: | |||
924 | /// | |||
925 | /// @code{.cpp} | |||
926 | /// enum FooStrategy { Aggressive, Conservative }; | |||
927 | /// Expected<Foo> foo(FooStrategy S); | |||
928 | /// | |||
929 | /// auto ResultOrErr = | |||
930 | /// handleExpected( | |||
931 | /// foo(Aggressive), | |||
932 | /// []() { return foo(Conservative); }, | |||
933 | /// [](AggressiveStrategyError&) { | |||
934 | /// // Implicitly conusme this - we'll recover by using a conservative | |||
935 | /// // strategy. | |||
936 | /// }); | |||
937 | /// | |||
938 | /// @endcode | |||
939 | template <typename T, typename RecoveryFtor, typename... HandlerTs> | |||
940 | Expected<T> handleExpected(Expected<T> ValOrErr, RecoveryFtor &&RecoveryPath, | |||
941 | HandlerTs &&... Handlers) { | |||
942 | if (ValOrErr) | |||
943 | return ValOrErr; | |||
944 | ||||
945 | if (auto Err = handleErrors(ValOrErr.takeError(), | |||
946 | std::forward<HandlerTs>(Handlers)...)) | |||
947 | return std::move(Err); | |||
948 | ||||
949 | return RecoveryPath(); | |||
950 | } | |||
951 | ||||
952 | /// Log all errors (if any) in E to OS. If there are any errors, ErrorBanner | |||
953 | /// will be printed before the first one is logged. A newline will be printed | |||
954 | /// after each error. | |||
955 | /// | |||
956 | /// This is useful in the base level of your program to allow clean termination | |||
957 | /// (allowing clean deallocation of resources, etc.), while reporting error | |||
958 | /// information to the user. | |||
959 | void logAllUnhandledErrors(Error E, raw_ostream &OS, Twine ErrorBanner); | |||
960 | ||||
961 | /// Write all error messages (if any) in E to a string. The newline character | |||
962 | /// is used to separate error messages. | |||
963 | inline std::string toString(Error E) { | |||
964 | SmallVector<std::string, 2> Errors; | |||
965 | handleAllErrors(std::move(E), [&Errors](const ErrorInfoBase &EI) { | |||
966 | Errors.push_back(EI.message()); | |||
967 | }); | |||
968 | return join(Errors.begin(), Errors.end(), "\n"); | |||
969 | } | |||
970 | ||||
971 | /// Consume a Error without doing anything. This method should be used | |||
972 | /// only where an error can be considered a reasonable and expected return | |||
973 | /// value. | |||
974 | /// | |||
975 | /// Uses of this method are potentially indicative of design problems: If it's | |||
976 | /// legitimate to do nothing while processing an "error", the error-producer | |||
977 | /// might be more clearly refactored to return an Optional<T>. | |||
978 | inline void consumeError(Error Err) { | |||
979 | handleAllErrors(std::move(Err), [](const ErrorInfoBase &) {}); | |||
980 | } | |||
981 | ||||
982 | /// Helper for converting an Error to a bool. | |||
983 | /// | |||
984 | /// This method returns true if Err is in an error state, or false if it is | |||
985 | /// in a success state. Puts Err in a checked state in both cases (unlike | |||
986 | /// Error::operator bool(), which only does this for success states). | |||
987 | inline bool errorToBool(Error Err) { | |||
988 | bool IsError = static_cast<bool>(Err); | |||
989 | if (IsError) | |||
990 | consumeError(std::move(Err)); | |||
991 | return IsError; | |||
992 | } | |||
993 | ||||
994 | /// Helper for Errors used as out-parameters. | |||
995 | /// | |||
996 | /// This helper is for use with the Error-as-out-parameter idiom, where an error | |||
997 | /// is passed to a function or method by reference, rather than being returned. | |||
998 | /// In such cases it is helpful to set the checked bit on entry to the function | |||
999 | /// so that the error can be written to (unchecked Errors abort on assignment) | |||
1000 | /// and clear the checked bit on exit so that clients cannot accidentally forget | |||
1001 | /// to check the result. This helper performs these actions automatically using | |||
1002 | /// RAII: | |||
1003 | /// | |||
1004 | /// @code{.cpp} | |||
1005 | /// Result foo(Error &Err) { | |||
1006 | /// ErrorAsOutParameter ErrAsOutParam(&Err); // 'Checked' flag set | |||
1007 | /// // <body of foo> | |||
1008 | /// // <- 'Checked' flag auto-cleared when ErrAsOutParam is destructed. | |||
1009 | /// } | |||
1010 | /// @endcode | |||
1011 | /// | |||
1012 | /// ErrorAsOutParameter takes an Error* rather than Error& so that it can be | |||
1013 | /// used with optional Errors (Error pointers that are allowed to be null). If | |||
1014 | /// ErrorAsOutParameter took an Error reference, an instance would have to be | |||
1015 | /// created inside every condition that verified that Error was non-null. By | |||
1016 | /// taking an Error pointer we can just create one instance at the top of the | |||
1017 | /// function. | |||
1018 | class ErrorAsOutParameter { | |||
1019 | public: | |||
1020 | ErrorAsOutParameter(Error *Err) : Err(Err) { | |||
1021 | // Raise the checked bit if Err is success. | |||
1022 | if (Err) | |||
1023 | (void)!!*Err; | |||
1024 | } | |||
1025 | ||||
1026 | ~ErrorAsOutParameter() { | |||
1027 | // Clear the checked bit. | |||
1028 | if (Err && !*Err) | |||
1029 | *Err = Error::success(); | |||
1030 | } | |||
1031 | ||||
1032 | private: | |||
1033 | Error *Err; | |||
1034 | }; | |||
1035 | ||||
1036 | /// Helper for Expected<T>s used as out-parameters. | |||
1037 | /// | |||
1038 | /// See ErrorAsOutParameter. | |||
1039 | template <typename T> | |||
1040 | class ExpectedAsOutParameter { | |||
1041 | public: | |||
1042 | ExpectedAsOutParameter(Expected<T> *ValOrErr) | |||
1043 | : ValOrErr(ValOrErr) { | |||
1044 | if (ValOrErr) | |||
1045 | (void)!!*ValOrErr; | |||
1046 | } | |||
1047 | ||||
1048 | ~ExpectedAsOutParameter() { | |||
1049 | if (ValOrErr) | |||
1050 | ValOrErr->setUnchecked(); | |||
1051 | } | |||
1052 | ||||
1053 | private: | |||
1054 | Expected<T> *ValOrErr; | |||
1055 | }; | |||
1056 | ||||
1057 | /// This class wraps a std::error_code in a Error. | |||
1058 | /// | |||
1059 | /// This is useful if you're writing an interface that returns a Error | |||
1060 | /// (or Expected) and you want to call code that still returns | |||
1061 | /// std::error_codes. | |||
1062 | class ECError : public ErrorInfo<ECError> { | |||
1063 | friend Error errorCodeToError(std::error_code); | |||
1064 | ||||
1065 | public: | |||
1066 | void setErrorCode(std::error_code EC) { this->EC = EC; } | |||
1067 | std::error_code convertToErrorCode() const override { return EC; } | |||
1068 | void log(raw_ostream &OS) const override { OS << EC.message(); } | |||
1069 | ||||
1070 | // Used by ErrorInfo::classID. | |||
1071 | static char ID; | |||
1072 | ||||
1073 | protected: | |||
1074 | ECError() = default; | |||
1075 | ECError(std::error_code EC) : EC(EC) {} | |||
1076 | ||||
1077 | std::error_code EC; | |||
1078 | }; | |||
1079 | ||||
1080 | /// The value returned by this function can be returned from convertToErrorCode | |||
1081 | /// for Error values where no sensible translation to std::error_code exists. | |||
1082 | /// It should only be used in this situation, and should never be used where a | |||
1083 | /// sensible conversion to std::error_code is available, as attempts to convert | |||
1084 | /// to/from this error will result in a fatal error. (i.e. it is a programmatic | |||
1085 | ///error to try to convert such a value). | |||
1086 | std::error_code inconvertibleErrorCode(); | |||
1087 | ||||
1088 | /// Helper for converting an std::error_code to a Error. | |||
1089 | Error errorCodeToError(std::error_code EC); | |||
1090 | ||||
1091 | /// Helper for converting an ECError to a std::error_code. | |||
1092 | /// | |||
1093 | /// This method requires that Err be Error() or an ECError, otherwise it | |||
1094 | /// will trigger a call to abort(). | |||
1095 | std::error_code errorToErrorCode(Error Err); | |||
1096 | ||||
1097 | /// Convert an ErrorOr<T> to an Expected<T>. | |||
1098 | template <typename T> Expected<T> errorOrToExpected(ErrorOr<T> &&EO) { | |||
1099 | if (auto EC = EO.getError()) | |||
1100 | return errorCodeToError(EC); | |||
1101 | return std::move(*EO); | |||
1102 | } | |||
1103 | ||||
1104 | /// Convert an Expected<T> to an ErrorOr<T>. | |||
1105 | template <typename T> ErrorOr<T> expectedToErrorOr(Expected<T> &&E) { | |||
1106 | if (auto Err = E.takeError()) | |||
1107 | return errorToErrorCode(std::move(Err)); | |||
1108 | return std::move(*E); | |||
1109 | } | |||
1110 | ||||
1111 | /// This class wraps a string in an Error. | |||
1112 | /// | |||
1113 | /// StringError is useful in cases where the client is not expected to be able | |||
1114 | /// to consume the specific error message programmatically (for example, if the | |||
1115 | /// error message is to be presented to the user). | |||
1116 | /// | |||
1117 | /// StringError can also be used when additional information is to be printed | |||
1118 | /// along with a error_code message. Depending on the constructor called, this | |||
1119 | /// class can either display: | |||
1120 | /// 1. the error_code message (ECError behavior) | |||
1121 | /// 2. a string | |||
1122 | /// 3. the error_code message and a string | |||
1123 | /// | |||
1124 | /// These behaviors are useful when subtyping is required; for example, when a | |||
1125 | /// specific library needs an explicit error type. In the example below, | |||
1126 | /// PDBError is derived from StringError: | |||
1127 | /// | |||
1128 | /// @code{.cpp} | |||
1129 | /// Expected<int> foo() { | |||
1130 | /// return llvm::make_error<PDBError>(pdb_error_code::dia_failed_loading, | |||
1131 | /// "Additional information"); | |||
1132 | /// } | |||
1133 | /// @endcode | |||
1134 | /// | |||
1135 | class StringError : public ErrorInfo<StringError> { | |||
1136 | public: | |||
1137 | static char ID; | |||
1138 | ||||
1139 | // Prints EC + S and converts to EC | |||
1140 | StringError(std::error_code EC, const Twine &S = Twine()); | |||
1141 | ||||
1142 | // Prints S and converts to EC | |||
1143 | StringError(const Twine &S, std::error_code EC); | |||
1144 | ||||
1145 | void log(raw_ostream &OS) const override; | |||
1146 | std::error_code convertToErrorCode() const override; | |||
1147 | ||||
1148 | const std::string &getMessage() const { return Msg; } | |||
1149 | ||||
1150 | private: | |||
1151 | std::string Msg; | |||
1152 | std::error_code EC; | |||
1153 | const bool PrintMsgOnly = false; | |||
1154 | }; | |||
1155 | ||||
1156 | /// Create formatted StringError object. | |||
1157 | template <typename... Ts> | |||
1158 | Error createStringError(std::error_code EC, char const *Fmt, | |||
1159 | const Ts &... Vals) { | |||
1160 | std::string Buffer; | |||
1161 | raw_string_ostream Stream(Buffer); | |||
1162 | Stream << format(Fmt, Vals...); | |||
1163 | return make_error<StringError>(Stream.str(), EC); | |||
1164 | } | |||
1165 | ||||
1166 | Error createStringError(std::error_code EC, char const *Msg); | |||
1167 | ||||
1168 | /// This class wraps a filename and another Error. | |||
1169 | /// | |||
1170 | /// In some cases, an error needs to live along a 'source' name, in order to | |||
1171 | /// show more detailed information to the user. | |||
1172 | class FileError final : public ErrorInfo<FileError> { | |||
1173 | ||||
1174 | friend Error createFileError(std::string, Error); | |||
1175 | ||||
1176 | public: | |||
1177 | void log(raw_ostream &OS) const override { | |||
1178 | assert(Err && !FileName.empty() && "Trying to log after takeError().")((Err && !FileName.empty() && "Trying to log after takeError()." ) ? static_cast<void> (0) : __assert_fail ("Err && !FileName.empty() && \"Trying to log after takeError().\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 1178, __PRETTY_FUNCTION__)); | |||
1179 | OS << "'" << FileName << "': "; | |||
1180 | Err->log(OS); | |||
1181 | } | |||
1182 | ||||
1183 | Error takeError() { return Error(std::move(Err)); } | |||
1184 | ||||
1185 | std::error_code convertToErrorCode() const override; | |||
1186 | ||||
1187 | // Used by ErrorInfo::classID. | |||
1188 | static char ID; | |||
1189 | ||||
1190 | private: | |||
1191 | FileError(std::string F, std::unique_ptr<ErrorInfoBase> E) { | |||
1192 | assert(E && "Cannot create FileError from Error success value.")((E && "Cannot create FileError from Error success value." ) ? static_cast<void> (0) : __assert_fail ("E && \"Cannot create FileError from Error success value.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 1192, __PRETTY_FUNCTION__)); | |||
1193 | assert(!F.empty() &&((!F.empty() && "The file name provided to FileError must not be empty." ) ? static_cast<void> (0) : __assert_fail ("!F.empty() && \"The file name provided to FileError must not be empty.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 1194, __PRETTY_FUNCTION__)) | |||
1194 | "The file name provided to FileError must not be empty.")((!F.empty() && "The file name provided to FileError must not be empty." ) ? static_cast<void> (0) : __assert_fail ("!F.empty() && \"The file name provided to FileError must not be empty.\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/Support/Error.h" , 1194, __PRETTY_FUNCTION__)); | |||
1195 | FileName = F; | |||
1196 | Err = std::move(E); | |||
1197 | } | |||
1198 | ||||
1199 | static Error build(std::string F, Error E) { | |||
1200 | return Error(std::unique_ptr<FileError>(new FileError(F, E.takePayload()))); | |||
1201 | } | |||
1202 | ||||
1203 | std::string FileName; | |||
1204 | std::unique_ptr<ErrorInfoBase> Err; | |||
1205 | }; | |||
1206 | ||||
1207 | /// Concatenate a source file path and/or name with an Error. The resulting | |||
1208 | /// Error is unchecked. | |||
1209 | inline Error createFileError(std::string F, Error E) { | |||
1210 | return FileError::build(F, std::move(E)); | |||
1211 | } | |||
1212 | ||||
1213 | Error createFileError(std::string F, ErrorSuccess) = delete; | |||
1214 | ||||
1215 | /// Helper for check-and-exit error handling. | |||
1216 | /// | |||
1217 | /// For tool use only. NOT FOR USE IN LIBRARY CODE. | |||
1218 | /// | |||
1219 | class ExitOnError { | |||
1220 | public: | |||
1221 | /// Create an error on exit helper. | |||
1222 | ExitOnError(std::string Banner = "", int DefaultErrorExitCode = 1) | |||
1223 | : Banner(std::move(Banner)), | |||
1224 | GetExitCode([=](const Error &) { return DefaultErrorExitCode; }) {} | |||
1225 | ||||
1226 | /// Set the banner string for any errors caught by operator(). | |||
1227 | void setBanner(std::string Banner) { this->Banner = std::move(Banner); } | |||
1228 | ||||
1229 | /// Set the exit-code mapper function. | |||
1230 | void setExitCodeMapper(std::function<int(const Error &)> GetExitCode) { | |||
1231 | this->GetExitCode = std::move(GetExitCode); | |||
1232 | } | |||
1233 | ||||
1234 | /// Check Err. If it's in a failure state log the error(s) and exit. | |||
1235 | void operator()(Error Err) const { checkError(std::move(Err)); } | |||
1236 | ||||
1237 | /// Check E. If it's in a success state then return the contained value. If | |||
1238 | /// it's in a failure state log the error(s) and exit. | |||
1239 | template <typename T> T operator()(Expected<T> &&E) const { | |||
1240 | checkError(E.takeError()); | |||
1241 | return std::move(*E); | |||
1242 | } | |||
1243 | ||||
1244 | /// Check E. If it's in a success state then return the contained reference. If | |||
1245 | /// it's in a failure state log the error(s) and exit. | |||
1246 | template <typename T> T& operator()(Expected<T&> &&E) const { | |||
1247 | checkError(E.takeError()); | |||
1248 | return *E; | |||
1249 | } | |||
1250 | ||||
1251 | private: | |||
1252 | void checkError(Error Err) const { | |||
1253 | if (Err) { | |||
1254 | int ExitCode = GetExitCode(Err); | |||
1255 | logAllUnhandledErrors(std::move(Err), errs(), Banner); | |||
1256 | exit(ExitCode); | |||
1257 | } | |||
1258 | } | |||
1259 | ||||
1260 | std::string Banner; | |||
1261 | std::function<int(const Error &)> GetExitCode; | |||
1262 | }; | |||
1263 | ||||
1264 | /// Conversion from Error to LLVMErrorRef for C error bindings. | |||
1265 | inline LLVMErrorRef wrap(Error Err) { | |||
1266 | return reinterpret_cast<LLVMErrorRef>(Err.takePayload().release()); | |||
1267 | } | |||
1268 | ||||
1269 | /// Conversion from LLVMErrorRef to Error for C error bindings. | |||
1270 | inline Error unwrap(LLVMErrorRef ErrRef) { | |||
1271 | return Error(std::unique_ptr<ErrorInfoBase>( | |||
1272 | reinterpret_cast<ErrorInfoBase *>(ErrRef))); | |||
1273 | } | |||
1274 | ||||
1275 | } // end namespace llvm | |||
1276 | ||||
1277 | #endif // LLVM_SUPPORT_ERROR_H |
1 | //===- llvm/ADT/STLExtras.h - Useful STL related functions ------*- 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 | // This file contains some templates that are useful if you are working with the |
11 | // STL at all. |
12 | // |
13 | // No library is required when using these functions. |
14 | // |
15 | //===----------------------------------------------------------------------===// |
16 | |
17 | #ifndef LLVM_ADT_STLEXTRAS_H |
18 | #define LLVM_ADT_STLEXTRAS_H |
19 | |
20 | #include "llvm/ADT/Optional.h" |
21 | #include "llvm/ADT/SmallVector.h" |
22 | #include "llvm/ADT/iterator.h" |
23 | #include "llvm/ADT/iterator_range.h" |
24 | #include "llvm/Config/abi-breaking.h" |
25 | #include "llvm/Support/ErrorHandling.h" |
26 | #include <algorithm> |
27 | #include <cassert> |
28 | #include <cstddef> |
29 | #include <cstdint> |
30 | #include <cstdlib> |
31 | #include <functional> |
32 | #include <initializer_list> |
33 | #include <iterator> |
34 | #include <limits> |
35 | #include <memory> |
36 | #include <tuple> |
37 | #include <type_traits> |
38 | #include <utility> |
39 | |
40 | #ifdef EXPENSIVE_CHECKS |
41 | #include <random> // for std::mt19937 |
42 | #endif |
43 | |
44 | namespace llvm { |
45 | |
46 | // Only used by compiler if both template types are the same. Useful when |
47 | // using SFINAE to test for the existence of member functions. |
48 | template <typename T, T> struct SameType; |
49 | |
50 | namespace detail { |
51 | |
52 | template <typename RangeT> |
53 | using IterOfRange = decltype(std::begin(std::declval<RangeT &>())); |
54 | |
55 | template <typename RangeT> |
56 | using ValueOfRange = typename std::remove_reference<decltype( |
57 | *std::begin(std::declval<RangeT &>()))>::type; |
58 | |
59 | } // end namespace detail |
60 | |
61 | //===----------------------------------------------------------------------===// |
62 | // Extra additions to <type_traits> |
63 | //===----------------------------------------------------------------------===// |
64 | |
65 | template <typename T> |
66 | struct negation : std::integral_constant<bool, !bool(T::value)> {}; |
67 | |
68 | template <typename...> struct conjunction : std::true_type {}; |
69 | template <typename B1> struct conjunction<B1> : B1 {}; |
70 | template <typename B1, typename... Bn> |
71 | struct conjunction<B1, Bn...> |
72 | : std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {}; |
73 | |
74 | //===----------------------------------------------------------------------===// |
75 | // Extra additions to <functional> |
76 | //===----------------------------------------------------------------------===// |
77 | |
78 | template <class Ty> struct identity { |
79 | using argument_type = Ty; |
80 | |
81 | Ty &operator()(Ty &self) const { |
82 | return self; |
83 | } |
84 | const Ty &operator()(const Ty &self) const { |
85 | return self; |
86 | } |
87 | }; |
88 | |
89 | template <class Ty> struct less_ptr { |
90 | bool operator()(const Ty* left, const Ty* right) const { |
91 | return *left < *right; |
92 | } |
93 | }; |
94 | |
95 | template <class Ty> struct greater_ptr { |
96 | bool operator()(const Ty* left, const Ty* right) const { |
97 | return *right < *left; |
98 | } |
99 | }; |
100 | |
101 | /// An efficient, type-erasing, non-owning reference to a callable. This is |
102 | /// intended for use as the type of a function parameter that is not used |
103 | /// after the function in question returns. |
104 | /// |
105 | /// This class does not own the callable, so it is not in general safe to store |
106 | /// a function_ref. |
107 | template<typename Fn> class function_ref; |
108 | |
109 | template<typename Ret, typename ...Params> |
110 | class function_ref<Ret(Params...)> { |
111 | Ret (*callback)(intptr_t callable, Params ...params) = nullptr; |
112 | intptr_t callable; |
113 | |
114 | template<typename Callable> |
115 | static Ret callback_fn(intptr_t callable, Params ...params) { |
116 | return (*reinterpret_cast<Callable*>(callable))( |
117 | std::forward<Params>(params)...); |
118 | } |
119 | |
120 | public: |
121 | function_ref() = default; |
122 | function_ref(std::nullptr_t) {} |
123 | |
124 | template <typename Callable> |
125 | function_ref(Callable &&callable, |
126 | typename std::enable_if< |
127 | !std::is_same<typename std::remove_reference<Callable>::type, |
128 | function_ref>::value>::type * = nullptr) |
129 | : callback(callback_fn<typename std::remove_reference<Callable>::type>), |
130 | callable(reinterpret_cast<intptr_t>(&callable)) {} |
131 | |
132 | Ret operator()(Params ...params) const { |
133 | return callback(callable, std::forward<Params>(params)...); |
134 | } |
135 | |
136 | operator bool() const { return callback; } |
137 | }; |
138 | |
139 | // deleter - Very very very simple method that is used to invoke operator |
140 | // delete on something. It is used like this: |
141 | // |
142 | // for_each(V.begin(), B.end(), deleter<Interval>); |
143 | template <class T> |
144 | inline void deleter(T *Ptr) { |
145 | delete Ptr; |
146 | } |
147 | |
148 | //===----------------------------------------------------------------------===// |
149 | // Extra additions to <iterator> |
150 | //===----------------------------------------------------------------------===// |
151 | |
152 | namespace adl_detail { |
153 | |
154 | using std::begin; |
155 | |
156 | template <typename ContainerTy> |
157 | auto adl_begin(ContainerTy &&container) |
158 | -> decltype(begin(std::forward<ContainerTy>(container))) { |
159 | return begin(std::forward<ContainerTy>(container)); |
160 | } |
161 | |
162 | using std::end; |
163 | |
164 | template <typename ContainerTy> |
165 | auto adl_end(ContainerTy &&container) |
166 | -> decltype(end(std::forward<ContainerTy>(container))) { |
167 | return end(std::forward<ContainerTy>(container)); |
168 | } |
169 | |
170 | using std::swap; |
171 | |
172 | template <typename T> |
173 | void adl_swap(T &&lhs, T &&rhs) noexcept(noexcept(swap(std::declval<T>(), |
174 | std::declval<T>()))) { |
175 | swap(std::forward<T>(lhs), std::forward<T>(rhs)); |
176 | } |
177 | |
178 | } // end namespace adl_detail |
179 | |
180 | template <typename ContainerTy> |
181 | auto adl_begin(ContainerTy &&container) |
182 | -> decltype(adl_detail::adl_begin(std::forward<ContainerTy>(container))) { |
183 | return adl_detail::adl_begin(std::forward<ContainerTy>(container)); |
184 | } |
185 | |
186 | template <typename ContainerTy> |
187 | auto adl_end(ContainerTy &&container) |
188 | -> decltype(adl_detail::adl_end(std::forward<ContainerTy>(container))) { |
189 | return adl_detail::adl_end(std::forward<ContainerTy>(container)); |
190 | } |
191 | |
192 | template <typename T> |
193 | void adl_swap(T &&lhs, T &&rhs) noexcept( |
194 | noexcept(adl_detail::adl_swap(std::declval<T>(), std::declval<T>()))) { |
195 | adl_detail::adl_swap(std::forward<T>(lhs), std::forward<T>(rhs)); |
196 | } |
197 | |
198 | // mapped_iterator - This is a simple iterator adapter that causes a function to |
199 | // be applied whenever operator* is invoked on the iterator. |
200 | |
201 | template <typename ItTy, typename FuncTy, |
202 | typename FuncReturnTy = |
203 | decltype(std::declval<FuncTy>()(*std::declval<ItTy>()))> |
204 | class mapped_iterator |
205 | : public iterator_adaptor_base< |
206 | mapped_iterator<ItTy, FuncTy>, ItTy, |
207 | typename std::iterator_traits<ItTy>::iterator_category, |
208 | typename std::remove_reference<FuncReturnTy>::type> { |
209 | public: |
210 | mapped_iterator(ItTy U, FuncTy F) |
211 | : mapped_iterator::iterator_adaptor_base(std::move(U)), F(std::move(F)) {} |
212 | |
213 | ItTy getCurrent() { return this->I; } |
214 | |
215 | FuncReturnTy operator*() { return F(*this->I); } |
216 | |
217 | private: |
218 | FuncTy F; |
219 | }; |
220 | |
221 | // map_iterator - Provide a convenient way to create mapped_iterators, just like |
222 | // make_pair is useful for creating pairs... |
223 | template <class ItTy, class FuncTy> |
224 | inline mapped_iterator<ItTy, FuncTy> map_iterator(ItTy I, FuncTy F) { |
225 | return mapped_iterator<ItTy, FuncTy>(std::move(I), std::move(F)); |
226 | } |
227 | |
228 | /// Helper to determine if type T has a member called rbegin(). |
229 | template <typename Ty> class has_rbegin_impl { |
230 | using yes = char[1]; |
231 | using no = char[2]; |
232 | |
233 | template <typename Inner> |
234 | static yes& test(Inner *I, decltype(I->rbegin()) * = nullptr); |
235 | |
236 | template <typename> |
237 | static no& test(...); |
238 | |
239 | public: |
240 | static const bool value = sizeof(test<Ty>(nullptr)) == sizeof(yes); |
241 | }; |
242 | |
243 | /// Metafunction to determine if T& or T has a member called rbegin(). |
244 | template <typename Ty> |
245 | struct has_rbegin : has_rbegin_impl<typename std::remove_reference<Ty>::type> { |
246 | }; |
247 | |
248 | // Returns an iterator_range over the given container which iterates in reverse. |
249 | // Note that the container must have rbegin()/rend() methods for this to work. |
250 | template <typename ContainerTy> |
251 | auto reverse(ContainerTy &&C, |
252 | typename std::enable_if<has_rbegin<ContainerTy>::value>::type * = |
253 | nullptr) -> decltype(make_range(C.rbegin(), C.rend())) { |
254 | return make_range(C.rbegin(), C.rend()); |
255 | } |
256 | |
257 | // Returns a std::reverse_iterator wrapped around the given iterator. |
258 | template <typename IteratorTy> |
259 | std::reverse_iterator<IteratorTy> make_reverse_iterator(IteratorTy It) { |
260 | return std::reverse_iterator<IteratorTy>(It); |
261 | } |
262 | |
263 | // Returns an iterator_range over the given container which iterates in reverse. |
264 | // Note that the container must have begin()/end() methods which return |
265 | // bidirectional iterators for this to work. |
266 | template <typename ContainerTy> |
267 | auto reverse( |
268 | ContainerTy &&C, |
269 | typename std::enable_if<!has_rbegin<ContainerTy>::value>::type * = nullptr) |
270 | -> decltype(make_range(llvm::make_reverse_iterator(std::end(C)), |
271 | llvm::make_reverse_iterator(std::begin(C)))) { |
272 | return make_range(llvm::make_reverse_iterator(std::end(C)), |
273 | llvm::make_reverse_iterator(std::begin(C))); |
274 | } |
275 | |
276 | /// An iterator adaptor that filters the elements of given inner iterators. |
277 | /// |
278 | /// The predicate parameter should be a callable object that accepts the wrapped |
279 | /// iterator's reference type and returns a bool. When incrementing or |
280 | /// decrementing the iterator, it will call the predicate on each element and |
281 | /// skip any where it returns false. |
282 | /// |
283 | /// \code |
284 | /// int A[] = { 1, 2, 3, 4 }; |
285 | /// auto R = make_filter_range(A, [](int N) { return N % 2 == 1; }); |
286 | /// // R contains { 1, 3 }. |
287 | /// \endcode |
288 | /// |
289 | /// Note: filter_iterator_base implements support for forward iteration. |
290 | /// filter_iterator_impl exists to provide support for bidirectional iteration, |
291 | /// conditional on whether the wrapped iterator supports it. |
292 | template <typename WrappedIteratorT, typename PredicateT, typename IterTag> |
293 | class filter_iterator_base |
294 | : public iterator_adaptor_base< |
295 | filter_iterator_base<WrappedIteratorT, PredicateT, IterTag>, |
296 | WrappedIteratorT, |
297 | typename std::common_type< |
298 | IterTag, typename std::iterator_traits< |
299 | WrappedIteratorT>::iterator_category>::type> { |
300 | using BaseT = iterator_adaptor_base< |
301 | filter_iterator_base<WrappedIteratorT, PredicateT, IterTag>, |
302 | WrappedIteratorT, |
303 | typename std::common_type< |
304 | IterTag, typename std::iterator_traits< |
305 | WrappedIteratorT>::iterator_category>::type>; |
306 | |
307 | protected: |
308 | WrappedIteratorT End; |
309 | PredicateT Pred; |
310 | |
311 | void findNextValid() { |
312 | while (this->I != End && !Pred(*this->I)) |
313 | BaseT::operator++(); |
314 | } |
315 | |
316 | // Construct the iterator. The begin iterator needs to know where the end |
317 | // is, so that it can properly stop when it gets there. The end iterator only |
318 | // needs the predicate to support bidirectional iteration. |
319 | filter_iterator_base(WrappedIteratorT Begin, WrappedIteratorT End, |
320 | PredicateT Pred) |
321 | : BaseT(Begin), End(End), Pred(Pred) { |
322 | findNextValid(); |
323 | } |
324 | |
325 | public: |
326 | using BaseT::operator++; |
327 | |
328 | filter_iterator_base &operator++() { |
329 | BaseT::operator++(); |
330 | findNextValid(); |
331 | return *this; |
332 | } |
333 | }; |
334 | |
335 | /// Specialization of filter_iterator_base for forward iteration only. |
336 | template <typename WrappedIteratorT, typename PredicateT, |
337 | typename IterTag = std::forward_iterator_tag> |
338 | class filter_iterator_impl |
339 | : public filter_iterator_base<WrappedIteratorT, PredicateT, IterTag> { |
340 | using BaseT = filter_iterator_base<WrappedIteratorT, PredicateT, IterTag>; |
341 | |
342 | public: |
343 | filter_iterator_impl(WrappedIteratorT Begin, WrappedIteratorT End, |
344 | PredicateT Pred) |
345 | : BaseT(Begin, End, Pred) {} |
346 | }; |
347 | |
348 | /// Specialization of filter_iterator_base for bidirectional iteration. |
349 | template <typename WrappedIteratorT, typename PredicateT> |
350 | class filter_iterator_impl<WrappedIteratorT, PredicateT, |
351 | std::bidirectional_iterator_tag> |
352 | : public filter_iterator_base<WrappedIteratorT, PredicateT, |
353 | std::bidirectional_iterator_tag> { |
354 | using BaseT = filter_iterator_base<WrappedIteratorT, PredicateT, |
355 | std::bidirectional_iterator_tag>; |
356 | void findPrevValid() { |
357 | while (!this->Pred(*this->I)) |
358 | BaseT::operator--(); |
359 | } |
360 | |
361 | public: |
362 | using BaseT::operator--; |
363 | |
364 | filter_iterator_impl(WrappedIteratorT Begin, WrappedIteratorT End, |
365 | PredicateT Pred) |
366 | : BaseT(Begin, End, Pred) {} |
367 | |
368 | filter_iterator_impl &operator--() { |
369 | BaseT::operator--(); |
370 | findPrevValid(); |
371 | return *this; |
372 | } |
373 | }; |
374 | |
375 | namespace detail { |
376 | |
377 | template <bool is_bidirectional> struct fwd_or_bidi_tag_impl { |
378 | using type = std::forward_iterator_tag; |
379 | }; |
380 | |
381 | template <> struct fwd_or_bidi_tag_impl<true> { |
382 | using type = std::bidirectional_iterator_tag; |
383 | }; |
384 | |
385 | /// Helper which sets its type member to forward_iterator_tag if the category |
386 | /// of \p IterT does not derive from bidirectional_iterator_tag, and to |
387 | /// bidirectional_iterator_tag otherwise. |
388 | template <typename IterT> struct fwd_or_bidi_tag { |
389 | using type = typename fwd_or_bidi_tag_impl<std::is_base_of< |
390 | std::bidirectional_iterator_tag, |
391 | typename std::iterator_traits<IterT>::iterator_category>::value>::type; |
392 | }; |
393 | |
394 | } // namespace detail |
395 | |
396 | /// Defines filter_iterator to a suitable specialization of |
397 | /// filter_iterator_impl, based on the underlying iterator's category. |
398 | template <typename WrappedIteratorT, typename PredicateT> |
399 | using filter_iterator = filter_iterator_impl< |
400 | WrappedIteratorT, PredicateT, |
401 | typename detail::fwd_or_bidi_tag<WrappedIteratorT>::type>; |
402 | |
403 | /// Convenience function that takes a range of elements and a predicate, |
404 | /// and return a new filter_iterator range. |
405 | /// |
406 | /// FIXME: Currently if RangeT && is a rvalue reference to a temporary, the |
407 | /// lifetime of that temporary is not kept by the returned range object, and the |
408 | /// temporary is going to be dropped on the floor after the make_iterator_range |
409 | /// full expression that contains this function call. |
410 | template <typename RangeT, typename PredicateT> |
411 | iterator_range<filter_iterator<detail::IterOfRange<RangeT>, PredicateT>> |
412 | make_filter_range(RangeT &&Range, PredicateT Pred) { |
413 | using FilterIteratorT = |
414 | filter_iterator<detail::IterOfRange<RangeT>, PredicateT>; |
415 | return make_range( |
416 | FilterIteratorT(std::begin(std::forward<RangeT>(Range)), |
417 | std::end(std::forward<RangeT>(Range)), Pred), |
418 | FilterIteratorT(std::end(std::forward<RangeT>(Range)), |
419 | std::end(std::forward<RangeT>(Range)), Pred)); |
420 | } |
421 | |
422 | /// A pseudo-iterator adaptor that is designed to implement "early increment" |
423 | /// style loops. |
424 | /// |
425 | /// This is *not a normal iterator* and should almost never be used directly. It |
426 | /// is intended primarily to be used with range based for loops and some range |
427 | /// algorithms. |
428 | /// |
429 | /// The iterator isn't quite an `OutputIterator` or an `InputIterator` but |
430 | /// somewhere between them. The constraints of these iterators are: |
431 | /// |
432 | /// - On construction or after being incremented, it is comparable and |
433 | /// dereferencable. It is *not* incrementable. |
434 | /// - After being dereferenced, it is neither comparable nor dereferencable, it |
435 | /// is only incrementable. |
436 | /// |
437 | /// This means you can only dereference the iterator once, and you can only |
438 | /// increment it once between dereferences. |
439 | template <typename WrappedIteratorT> |
440 | class early_inc_iterator_impl |
441 | : public iterator_adaptor_base<early_inc_iterator_impl<WrappedIteratorT>, |
442 | WrappedIteratorT, std::input_iterator_tag> { |
443 | using BaseT = |
444 | iterator_adaptor_base<early_inc_iterator_impl<WrappedIteratorT>, |
445 | WrappedIteratorT, std::input_iterator_tag>; |
446 | |
447 | using PointerT = typename std::iterator_traits<WrappedIteratorT>::pointer; |
448 | |
449 | protected: |
450 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 |
451 | bool IsEarlyIncremented = false; |
452 | #endif |
453 | |
454 | public: |
455 | early_inc_iterator_impl(WrappedIteratorT I) : BaseT(I) {} |
456 | |
457 | using BaseT::operator*; |
458 | typename BaseT::reference operator*() { |
459 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 |
460 | assert(!IsEarlyIncremented && "Cannot dereference twice!")((!IsEarlyIncremented && "Cannot dereference twice!") ? static_cast<void> (0) : __assert_fail ("!IsEarlyIncremented && \"Cannot dereference twice!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 460, __PRETTY_FUNCTION__)); |
461 | IsEarlyIncremented = true; |
462 | #endif |
463 | return *(this->I)++; |
464 | } |
465 | |
466 | using BaseT::operator++; |
467 | early_inc_iterator_impl &operator++() { |
468 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 |
469 | assert(IsEarlyIncremented && "Cannot increment before dereferencing!")((IsEarlyIncremented && "Cannot increment before dereferencing!" ) ? static_cast<void> (0) : __assert_fail ("IsEarlyIncremented && \"Cannot increment before dereferencing!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 469, __PRETTY_FUNCTION__)); |
470 | IsEarlyIncremented = false; |
471 | #endif |
472 | return *this; |
473 | } |
474 | |
475 | using BaseT::operator==; |
476 | bool operator==(const early_inc_iterator_impl &RHS) const { |
477 | #if LLVM_ENABLE_ABI_BREAKING_CHECKS1 |
478 | assert(!IsEarlyIncremented && "Cannot compare after dereferencing!")((!IsEarlyIncremented && "Cannot compare after dereferencing!" ) ? static_cast<void> (0) : __assert_fail ("!IsEarlyIncremented && \"Cannot compare after dereferencing!\"" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 478, __PRETTY_FUNCTION__)); |
479 | #endif |
480 | return BaseT::operator==(RHS); |
481 | } |
482 | }; |
483 | |
484 | /// Make a range that does early increment to allow mutation of the underlying |
485 | /// range without disrupting iteration. |
486 | /// |
487 | /// The underlying iterator will be incremented immediately after it is |
488 | /// dereferenced, allowing deletion of the current node or insertion of nodes to |
489 | /// not disrupt iteration provided they do not invalidate the *next* iterator -- |
490 | /// the current iterator can be invalidated. |
491 | /// |
492 | /// This requires a very exact pattern of use that is only really suitable to |
493 | /// range based for loops and other range algorithms that explicitly guarantee |
494 | /// to dereference exactly once each element, and to increment exactly once each |
495 | /// element. |
496 | template <typename RangeT> |
497 | iterator_range<early_inc_iterator_impl<detail::IterOfRange<RangeT>>> |
498 | make_early_inc_range(RangeT &&Range) { |
499 | using EarlyIncIteratorT = |
500 | early_inc_iterator_impl<detail::IterOfRange<RangeT>>; |
501 | return make_range(EarlyIncIteratorT(std::begin(std::forward<RangeT>(Range))), |
502 | EarlyIncIteratorT(std::end(std::forward<RangeT>(Range)))); |
503 | } |
504 | |
505 | // forward declarations required by zip_shortest/zip_first |
506 | template <typename R, typename UnaryPredicate> |
507 | bool all_of(R &&range, UnaryPredicate P); |
508 | |
509 | template <size_t... I> struct index_sequence; |
510 | |
511 | template <class... Ts> struct index_sequence_for; |
512 | |
513 | namespace detail { |
514 | |
515 | using std::declval; |
516 | |
517 | // We have to alias this since inlining the actual type at the usage site |
518 | // in the parameter list of iterator_facade_base<> below ICEs MSVC 2017. |
519 | template<typename... Iters> struct ZipTupleType { |
520 | using type = std::tuple<decltype(*declval<Iters>())...>; |
521 | }; |
522 | |
523 | template <typename ZipType, typename... Iters> |
524 | using zip_traits = iterator_facade_base< |
525 | ZipType, typename std::common_type<std::bidirectional_iterator_tag, |
526 | typename std::iterator_traits< |
527 | Iters>::iterator_category...>::type, |
528 | // ^ TODO: Implement random access methods. |
529 | typename ZipTupleType<Iters...>::type, |
530 | typename std::iterator_traits<typename std::tuple_element< |
531 | 0, std::tuple<Iters...>>::type>::difference_type, |
532 | // ^ FIXME: This follows boost::make_zip_iterator's assumption that all |
533 | // inner iterators have the same difference_type. It would fail if, for |
534 | // instance, the second field's difference_type were non-numeric while the |
535 | // first is. |
536 | typename ZipTupleType<Iters...>::type *, |
537 | typename ZipTupleType<Iters...>::type>; |
538 | |
539 | template <typename ZipType, typename... Iters> |
540 | struct zip_common : public zip_traits<ZipType, Iters...> { |
541 | using Base = zip_traits<ZipType, Iters...>; |
542 | using value_type = typename Base::value_type; |
543 | |
544 | std::tuple<Iters...> iterators; |
545 | |
546 | protected: |
547 | template <size_t... Ns> value_type deref(index_sequence<Ns...>) const { |
548 | return value_type(*std::get<Ns>(iterators)...); |
549 | } |
550 | |
551 | template <size_t... Ns> |
552 | decltype(iterators) tup_inc(index_sequence<Ns...>) const { |
553 | return std::tuple<Iters...>(std::next(std::get<Ns>(iterators))...); |
554 | } |
555 | |
556 | template <size_t... Ns> |
557 | decltype(iterators) tup_dec(index_sequence<Ns...>) const { |
558 | return std::tuple<Iters...>(std::prev(std::get<Ns>(iterators))...); |
559 | } |
560 | |
561 | public: |
562 | zip_common(Iters &&... ts) : iterators(std::forward<Iters>(ts)...) {} |
563 | |
564 | value_type operator*() { return deref(index_sequence_for<Iters...>{}); } |
565 | |
566 | const value_type operator*() const { |
567 | return deref(index_sequence_for<Iters...>{}); |
568 | } |
569 | |
570 | ZipType &operator++() { |
571 | iterators = tup_inc(index_sequence_for<Iters...>{}); |
572 | return *reinterpret_cast<ZipType *>(this); |
573 | } |
574 | |
575 | ZipType &operator--() { |
576 | static_assert(Base::IsBidirectional, |
577 | "All inner iterators must be at least bidirectional."); |
578 | iterators = tup_dec(index_sequence_for<Iters...>{}); |
579 | return *reinterpret_cast<ZipType *>(this); |
580 | } |
581 | }; |
582 | |
583 | template <typename... Iters> |
584 | struct zip_first : public zip_common<zip_first<Iters...>, Iters...> { |
585 | using Base = zip_common<zip_first<Iters...>, Iters...>; |
586 | |
587 | bool operator==(const zip_first<Iters...> &other) const { |
588 | return std::get<0>(this->iterators) == std::get<0>(other.iterators); |
589 | } |
590 | |
591 | zip_first(Iters &&... ts) : Base(std::forward<Iters>(ts)...) {} |
592 | }; |
593 | |
594 | template <typename... Iters> |
595 | class zip_shortest : public zip_common<zip_shortest<Iters...>, Iters...> { |
596 | template <size_t... Ns> |
597 | bool test(const zip_shortest<Iters...> &other, index_sequence<Ns...>) const { |
598 | return all_of(std::initializer_list<bool>{std::get<Ns>(this->iterators) != |
599 | std::get<Ns>(other.iterators)...}, |
600 | identity<bool>{}); |
601 | } |
602 | |
603 | public: |
604 | using Base = zip_common<zip_shortest<Iters...>, Iters...>; |
605 | |
606 | zip_shortest(Iters &&... ts) : Base(std::forward<Iters>(ts)...) {} |
607 | |
608 | bool operator==(const zip_shortest<Iters...> &other) const { |
609 | return !test(other, index_sequence_for<Iters...>{}); |
610 | } |
611 | }; |
612 | |
613 | template <template <typename...> class ItType, typename... Args> class zippy { |
614 | public: |
615 | using iterator = ItType<decltype(std::begin(std::declval<Args>()))...>; |
616 | using iterator_category = typename iterator::iterator_category; |
617 | using value_type = typename iterator::value_type; |
618 | using difference_type = typename iterator::difference_type; |
619 | using pointer = typename iterator::pointer; |
620 | using reference = typename iterator::reference; |
621 | |
622 | private: |
623 | std::tuple<Args...> ts; |
624 | |
625 | template <size_t... Ns> iterator begin_impl(index_sequence<Ns...>) const { |
626 | return iterator(std::begin(std::get<Ns>(ts))...); |
627 | } |
628 | template <size_t... Ns> iterator end_impl(index_sequence<Ns...>) const { |
629 | return iterator(std::end(std::get<Ns>(ts))...); |
630 | } |
631 | |
632 | public: |
633 | zippy(Args &&... ts_) : ts(std::forward<Args>(ts_)...) {} |
634 | |
635 | iterator begin() const { return begin_impl(index_sequence_for<Args...>{}); } |
636 | iterator end() const { return end_impl(index_sequence_for<Args...>{}); } |
637 | }; |
638 | |
639 | } // end namespace detail |
640 | |
641 | /// zip iterator for two or more iteratable types. |
642 | template <typename T, typename U, typename... Args> |
643 | detail::zippy<detail::zip_shortest, T, U, Args...> zip(T &&t, U &&u, |
644 | Args &&... args) { |
645 | return detail::zippy<detail::zip_shortest, T, U, Args...>( |
646 | std::forward<T>(t), std::forward<U>(u), std::forward<Args>(args)...); |
647 | } |
648 | |
649 | /// zip iterator that, for the sake of efficiency, assumes the first iteratee to |
650 | /// be the shortest. |
651 | template <typename T, typename U, typename... Args> |
652 | detail::zippy<detail::zip_first, T, U, Args...> zip_first(T &&t, U &&u, |
653 | Args &&... args) { |
654 | return detail::zippy<detail::zip_first, T, U, Args...>( |
655 | std::forward<T>(t), std::forward<U>(u), std::forward<Args>(args)...); |
656 | } |
657 | |
658 | /// Iterator wrapper that concatenates sequences together. |
659 | /// |
660 | /// This can concatenate different iterators, even with different types, into |
661 | /// a single iterator provided the value types of all the concatenated |
662 | /// iterators expose `reference` and `pointer` types that can be converted to |
663 | /// `ValueT &` and `ValueT *` respectively. It doesn't support more |
664 | /// interesting/customized pointer or reference types. |
665 | /// |
666 | /// Currently this only supports forward or higher iterator categories as |
667 | /// inputs and always exposes a forward iterator interface. |
668 | template <typename ValueT, typename... IterTs> |
669 | class concat_iterator |
670 | : public iterator_facade_base<concat_iterator<ValueT, IterTs...>, |
671 | std::forward_iterator_tag, ValueT> { |
672 | using BaseT = typename concat_iterator::iterator_facade_base; |
673 | |
674 | /// We store both the current and end iterators for each concatenated |
675 | /// sequence in a tuple of pairs. |
676 | /// |
677 | /// Note that something like iterator_range seems nice at first here, but the |
678 | /// range properties are of little benefit and end up getting in the way |
679 | /// because we need to do mutation on the current iterators. |
680 | std::tuple<IterTs...> Begins; |
681 | std::tuple<IterTs...> Ends; |
682 | |
683 | /// Attempts to increment a specific iterator. |
684 | /// |
685 | /// Returns true if it was able to increment the iterator. Returns false if |
686 | /// the iterator is already at the end iterator. |
687 | template <size_t Index> bool incrementHelper() { |
688 | auto &Begin = std::get<Index>(Begins); |
689 | auto &End = std::get<Index>(Ends); |
690 | if (Begin == End) |
691 | return false; |
692 | |
693 | ++Begin; |
694 | return true; |
695 | } |
696 | |
697 | /// Increments the first non-end iterator. |
698 | /// |
699 | /// It is an error to call this with all iterators at the end. |
700 | template <size_t... Ns> void increment(index_sequence<Ns...>) { |
701 | // Build a sequence of functions to increment each iterator if possible. |
702 | bool (concat_iterator::*IncrementHelperFns[])() = { |
703 | &concat_iterator::incrementHelper<Ns>...}; |
704 | |
705 | // Loop over them, and stop as soon as we succeed at incrementing one. |
706 | for (auto &IncrementHelperFn : IncrementHelperFns) |
707 | if ((this->*IncrementHelperFn)()) |
708 | return; |
709 | |
710 | llvm_unreachable("Attempted to increment an end concat iterator!")::llvm::llvm_unreachable_internal("Attempted to increment an end concat iterator!" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 710); |
711 | } |
712 | |
713 | /// Returns null if the specified iterator is at the end. Otherwise, |
714 | /// dereferences the iterator and returns the address of the resulting |
715 | /// reference. |
716 | template <size_t Index> ValueT *getHelper() const { |
717 | auto &Begin = std::get<Index>(Begins); |
718 | auto &End = std::get<Index>(Ends); |
719 | if (Begin == End) |
720 | return nullptr; |
721 | |
722 | return &*Begin; |
723 | } |
724 | |
725 | /// Finds the first non-end iterator, dereferences, and returns the resulting |
726 | /// reference. |
727 | /// |
728 | /// It is an error to call this with all iterators at the end. |
729 | template <size_t... Ns> ValueT &get(index_sequence<Ns...>) const { |
730 | // Build a sequence of functions to get from iterator if possible. |
731 | ValueT *(concat_iterator::*GetHelperFns[])() const = { |
732 | &concat_iterator::getHelper<Ns>...}; |
733 | |
734 | // Loop over them, and return the first result we find. |
735 | for (auto &GetHelperFn : GetHelperFns) |
736 | if (ValueT *P = (this->*GetHelperFn)()) |
737 | return *P; |
738 | |
739 | llvm_unreachable("Attempted to get a pointer from an end concat iterator!")::llvm::llvm_unreachable_internal("Attempted to get a pointer from an end concat iterator!" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 739); |
740 | } |
741 | |
742 | public: |
743 | /// Constructs an iterator from a squence of ranges. |
744 | /// |
745 | /// We need the full range to know how to switch between each of the |
746 | /// iterators. |
747 | template <typename... RangeTs> |
748 | explicit concat_iterator(RangeTs &&... Ranges) |
749 | : Begins(std::begin(Ranges)...), Ends(std::end(Ranges)...) {} |
750 | |
751 | using BaseT::operator++; |
752 | |
753 | concat_iterator &operator++() { |
754 | increment(index_sequence_for<IterTs...>()); |
755 | return *this; |
756 | } |
757 | |
758 | ValueT &operator*() const { return get(index_sequence_for<IterTs...>()); } |
759 | |
760 | bool operator==(const concat_iterator &RHS) const { |
761 | return Begins == RHS.Begins && Ends == RHS.Ends; |
762 | } |
763 | }; |
764 | |
765 | namespace detail { |
766 | |
767 | /// Helper to store a sequence of ranges being concatenated and access them. |
768 | /// |
769 | /// This is designed to facilitate providing actual storage when temporaries |
770 | /// are passed into the constructor such that we can use it as part of range |
771 | /// based for loops. |
772 | template <typename ValueT, typename... RangeTs> class concat_range { |
773 | public: |
774 | using iterator = |
775 | concat_iterator<ValueT, |
776 | decltype(std::begin(std::declval<RangeTs &>()))...>; |
777 | |
778 | private: |
779 | std::tuple<RangeTs...> Ranges; |
780 | |
781 | template <size_t... Ns> iterator begin_impl(index_sequence<Ns...>) { |
782 | return iterator(std::get<Ns>(Ranges)...); |
783 | } |
784 | template <size_t... Ns> iterator end_impl(index_sequence<Ns...>) { |
785 | return iterator(make_range(std::end(std::get<Ns>(Ranges)), |
786 | std::end(std::get<Ns>(Ranges)))...); |
787 | } |
788 | |
789 | public: |
790 | concat_range(RangeTs &&... Ranges) |
791 | : Ranges(std::forward<RangeTs>(Ranges)...) {} |
792 | |
793 | iterator begin() { return begin_impl(index_sequence_for<RangeTs...>{}); } |
794 | iterator end() { return end_impl(index_sequence_for<RangeTs...>{}); } |
795 | }; |
796 | |
797 | } // end namespace detail |
798 | |
799 | /// Concatenated range across two or more ranges. |
800 | /// |
801 | /// The desired value type must be explicitly specified. |
802 | template <typename ValueT, typename... RangeTs> |
803 | detail::concat_range<ValueT, RangeTs...> concat(RangeTs &&... Ranges) { |
804 | static_assert(sizeof...(RangeTs) > 1, |
805 | "Need more than one range to concatenate!"); |
806 | return detail::concat_range<ValueT, RangeTs...>( |
807 | std::forward<RangeTs>(Ranges)...); |
808 | } |
809 | |
810 | //===----------------------------------------------------------------------===// |
811 | // Extra additions to <utility> |
812 | //===----------------------------------------------------------------------===// |
813 | |
814 | /// Function object to check whether the first component of a std::pair |
815 | /// compares less than the first component of another std::pair. |
816 | struct less_first { |
817 | template <typename T> bool operator()(const T &lhs, const T &rhs) const { |
818 | return lhs.first < rhs.first; |
819 | } |
820 | }; |
821 | |
822 | /// Function object to check whether the second component of a std::pair |
823 | /// compares less than the second component of another std::pair. |
824 | struct less_second { |
825 | template <typename T> bool operator()(const T &lhs, const T &rhs) const { |
826 | return lhs.second < rhs.second; |
827 | } |
828 | }; |
829 | |
830 | /// \brief Function object to apply a binary function to the first component of |
831 | /// a std::pair. |
832 | template<typename FuncTy> |
833 | struct on_first { |
834 | FuncTy func; |
835 | |
836 | template <typename T> |
837 | auto operator()(const T &lhs, const T &rhs) const |
838 | -> decltype(func(lhs.first, rhs.first)) { |
839 | return func(lhs.first, rhs.first); |
840 | } |
841 | }; |
842 | |
843 | // A subset of N3658. More stuff can be added as-needed. |
844 | |
845 | /// Represents a compile-time sequence of integers. |
846 | template <class T, T... I> struct integer_sequence { |
847 | using value_type = T; |
848 | |
849 | static constexpr size_t size() { return sizeof...(I); } |
850 | }; |
851 | |
852 | /// Alias for the common case of a sequence of size_ts. |
853 | template <size_t... I> |
854 | struct index_sequence : integer_sequence<std::size_t, I...> {}; |
855 | |
856 | template <std::size_t N, std::size_t... I> |
857 | struct build_index_impl : build_index_impl<N - 1, N - 1, I...> {}; |
858 | template <std::size_t... I> |
859 | struct build_index_impl<0, I...> : index_sequence<I...> {}; |
860 | |
861 | /// Creates a compile-time integer sequence for a parameter pack. |
862 | template <class... Ts> |
863 | struct index_sequence_for : build_index_impl<sizeof...(Ts)> {}; |
864 | |
865 | /// Utility type to build an inheritance chain that makes it easy to rank |
866 | /// overload candidates. |
867 | template <int N> struct rank : rank<N - 1> {}; |
868 | template <> struct rank<0> {}; |
869 | |
870 | /// traits class for checking whether type T is one of any of the given |
871 | /// types in the variadic list. |
872 | template <typename T, typename... Ts> struct is_one_of { |
873 | static const bool value = false; |
874 | }; |
875 | |
876 | template <typename T, typename U, typename... Ts> |
877 | struct is_one_of<T, U, Ts...> { |
878 | static const bool value = |
879 | std::is_same<T, U>::value || is_one_of<T, Ts...>::value; |
880 | }; |
881 | |
882 | /// traits class for checking whether type T is a base class for all |
883 | /// the given types in the variadic list. |
884 | template <typename T, typename... Ts> struct are_base_of { |
885 | static const bool value = true; |
886 | }; |
887 | |
888 | template <typename T, typename U, typename... Ts> |
889 | struct are_base_of<T, U, Ts...> { |
890 | static const bool value = |
891 | std::is_base_of<T, U>::value && are_base_of<T, Ts...>::value; |
892 | }; |
893 | |
894 | //===----------------------------------------------------------------------===// |
895 | // Extra additions for arrays |
896 | //===----------------------------------------------------------------------===// |
897 | |
898 | /// Find the length of an array. |
899 | template <class T, std::size_t N> |
900 | constexpr inline size_t array_lengthof(T (&)[N]) { |
901 | return N; |
902 | } |
903 | |
904 | /// Adapt std::less<T> for array_pod_sort. |
905 | template<typename T> |
906 | inline int array_pod_sort_comparator(const void *P1, const void *P2) { |
907 | if (std::less<T>()(*reinterpret_cast<const T*>(P1), |
908 | *reinterpret_cast<const T*>(P2))) |
909 | return -1; |
910 | if (std::less<T>()(*reinterpret_cast<const T*>(P2), |
911 | *reinterpret_cast<const T*>(P1))) |
912 | return 1; |
913 | return 0; |
914 | } |
915 | |
916 | /// get_array_pod_sort_comparator - This is an internal helper function used to |
917 | /// get type deduction of T right. |
918 | template<typename T> |
919 | inline int (*get_array_pod_sort_comparator(const T &)) |
920 | (const void*, const void*) { |
921 | return array_pod_sort_comparator<T>; |
922 | } |
923 | |
924 | /// array_pod_sort - This sorts an array with the specified start and end |
925 | /// extent. This is just like std::sort, except that it calls qsort instead of |
926 | /// using an inlined template. qsort is slightly slower than std::sort, but |
927 | /// most sorts are not performance critical in LLVM and std::sort has to be |
928 | /// template instantiated for each type, leading to significant measured code |
929 | /// bloat. This function should generally be used instead of std::sort where |
930 | /// possible. |
931 | /// |
932 | /// This function assumes that you have simple POD-like types that can be |
933 | /// compared with std::less and can be moved with memcpy. If this isn't true, |
934 | /// you should use std::sort. |
935 | /// |
936 | /// NOTE: If qsort_r were portable, we could allow a custom comparator and |
937 | /// default to std::less. |
938 | template<class IteratorTy> |
939 | inline void array_pod_sort(IteratorTy Start, IteratorTy End) { |
940 | // Don't inefficiently call qsort with one element or trigger undefined |
941 | // behavior with an empty sequence. |
942 | auto NElts = End - Start; |
943 | if (NElts <= 1) return; |
944 | #ifdef EXPENSIVE_CHECKS |
945 | std::mt19937 Generator(std::random_device{}()); |
946 | std::shuffle(Start, End, Generator); |
947 | #endif |
948 | qsort(&*Start, NElts, sizeof(*Start), get_array_pod_sort_comparator(*Start)); |
949 | } |
950 | |
951 | template <class IteratorTy> |
952 | inline void array_pod_sort( |
953 | IteratorTy Start, IteratorTy End, |
954 | int (*Compare)( |
955 | const typename std::iterator_traits<IteratorTy>::value_type *, |
956 | const typename std::iterator_traits<IteratorTy>::value_type *)) { |
957 | // Don't inefficiently call qsort with one element or trigger undefined |
958 | // behavior with an empty sequence. |
959 | auto NElts = End - Start; |
960 | if (NElts <= 1) return; |
961 | #ifdef EXPENSIVE_CHECKS |
962 | std::mt19937 Generator(std::random_device{}()); |
963 | std::shuffle(Start, End, Generator); |
964 | #endif |
965 | qsort(&*Start, NElts, sizeof(*Start), |
966 | reinterpret_cast<int (*)(const void *, const void *)>(Compare)); |
967 | } |
968 | |
969 | // Provide wrappers to std::sort which shuffle the elements before sorting |
970 | // to help uncover non-deterministic behavior (PR35135). |
971 | template <typename IteratorTy> |
972 | inline void sort(IteratorTy Start, IteratorTy End) { |
973 | #ifdef EXPENSIVE_CHECKS |
974 | std::mt19937 Generator(std::random_device{}()); |
975 | std::shuffle(Start, End, Generator); |
976 | #endif |
977 | std::sort(Start, End); |
978 | } |
979 | |
980 | template <typename Container> inline void sort(Container &&C) { |
981 | llvm::sort(adl_begin(C), adl_end(C)); |
982 | } |
983 | |
984 | template <typename IteratorTy, typename Compare> |
985 | inline void sort(IteratorTy Start, IteratorTy End, Compare Comp) { |
986 | #ifdef EXPENSIVE_CHECKS |
987 | std::mt19937 Generator(std::random_device{}()); |
988 | std::shuffle(Start, End, Generator); |
989 | #endif |
990 | std::sort(Start, End, Comp); |
991 | } |
992 | |
993 | template <typename Container, typename Compare> |
994 | inline void sort(Container &&C, Compare Comp) { |
995 | llvm::sort(adl_begin(C), adl_end(C), Comp); |
996 | } |
997 | |
998 | //===----------------------------------------------------------------------===// |
999 | // Extra additions to <algorithm> |
1000 | //===----------------------------------------------------------------------===// |
1001 | |
1002 | /// For a container of pointers, deletes the pointers and then clears the |
1003 | /// container. |
1004 | template<typename Container> |
1005 | void DeleteContainerPointers(Container &C) { |
1006 | for (auto V : C) |
1007 | delete V; |
1008 | C.clear(); |
1009 | } |
1010 | |
1011 | /// In a container of pairs (usually a map) whose second element is a pointer, |
1012 | /// deletes the second elements and then clears the container. |
1013 | template<typename Container> |
1014 | void DeleteContainerSeconds(Container &C) { |
1015 | for (auto &V : C) |
1016 | delete V.second; |
1017 | C.clear(); |
1018 | } |
1019 | |
1020 | /// Get the size of a range. This is a wrapper function around std::distance |
1021 | /// which is only enabled when the operation is O(1). |
1022 | template <typename R> |
1023 | auto size(R &&Range, typename std::enable_if< |
1024 | std::is_same<typename std::iterator_traits<decltype( |
1025 | Range.begin())>::iterator_category, |
1026 | std::random_access_iterator_tag>::value, |
1027 | void>::type * = nullptr) |
1028 | -> decltype(std::distance(Range.begin(), Range.end())) { |
1029 | return std::distance(Range.begin(), Range.end()); |
1030 | } |
1031 | |
1032 | /// Provide wrappers to std::for_each which take ranges instead of having to |
1033 | /// pass begin/end explicitly. |
1034 | template <typename R, typename UnaryPredicate> |
1035 | UnaryPredicate for_each(R &&Range, UnaryPredicate P) { |
1036 | return std::for_each(adl_begin(Range), adl_end(Range), P); |
1037 | } |
1038 | |
1039 | /// Provide wrappers to std::all_of which take ranges instead of having to pass |
1040 | /// begin/end explicitly. |
1041 | template <typename R, typename UnaryPredicate> |
1042 | bool all_of(R &&Range, UnaryPredicate P) { |
1043 | return std::all_of(adl_begin(Range), adl_end(Range), P); |
1044 | } |
1045 | |
1046 | /// Provide wrappers to std::any_of which take ranges instead of having to pass |
1047 | /// begin/end explicitly. |
1048 | template <typename R, typename UnaryPredicate> |
1049 | bool any_of(R &&Range, UnaryPredicate P) { |
1050 | return std::any_of(adl_begin(Range), adl_end(Range), P); |
1051 | } |
1052 | |
1053 | /// Provide wrappers to std::none_of which take ranges instead of having to pass |
1054 | /// begin/end explicitly. |
1055 | template <typename R, typename UnaryPredicate> |
1056 | bool none_of(R &&Range, UnaryPredicate P) { |
1057 | return std::none_of(adl_begin(Range), adl_end(Range), P); |
1058 | } |
1059 | |
1060 | /// Provide wrappers to std::find which take ranges instead of having to pass |
1061 | /// begin/end explicitly. |
1062 | template <typename R, typename T> |
1063 | auto find(R &&Range, const T &Val) -> decltype(adl_begin(Range)) { |
1064 | return std::find(adl_begin(Range), adl_end(Range), Val); |
1065 | } |
1066 | |
1067 | /// Provide wrappers to std::find_if which take ranges instead of having to pass |
1068 | /// begin/end explicitly. |
1069 | template <typename R, typename UnaryPredicate> |
1070 | auto find_if(R &&Range, UnaryPredicate P) -> decltype(adl_begin(Range)) { |
1071 | return std::find_if(adl_begin(Range), adl_end(Range), P); |
1072 | } |
1073 | |
1074 | template <typename R, typename UnaryPredicate> |
1075 | auto find_if_not(R &&Range, UnaryPredicate P) -> decltype(adl_begin(Range)) { |
1076 | return std::find_if_not(adl_begin(Range), adl_end(Range), P); |
1077 | } |
1078 | |
1079 | /// Provide wrappers to std::remove_if which take ranges instead of having to |
1080 | /// pass begin/end explicitly. |
1081 | template <typename R, typename UnaryPredicate> |
1082 | auto remove_if(R &&Range, UnaryPredicate P) -> decltype(adl_begin(Range)) { |
1083 | return std::remove_if(adl_begin(Range), adl_end(Range), P); |
1084 | } |
1085 | |
1086 | /// Provide wrappers to std::copy_if which take ranges instead of having to |
1087 | /// pass begin/end explicitly. |
1088 | template <typename R, typename OutputIt, typename UnaryPredicate> |
1089 | OutputIt copy_if(R &&Range, OutputIt Out, UnaryPredicate P) { |
1090 | return std::copy_if(adl_begin(Range), adl_end(Range), Out, P); |
1091 | } |
1092 | |
1093 | template <typename R, typename OutputIt> |
1094 | OutputIt copy(R &&Range, OutputIt Out) { |
1095 | return std::copy(adl_begin(Range), adl_end(Range), Out); |
1096 | } |
1097 | |
1098 | /// Wrapper function around std::find to detect if an element exists |
1099 | /// in a container. |
1100 | template <typename R, typename E> |
1101 | bool is_contained(R &&Range, const E &Element) { |
1102 | return std::find(adl_begin(Range), adl_end(Range), Element) != adl_end(Range); |
1103 | } |
1104 | |
1105 | /// Wrapper function around std::count to count the number of times an element |
1106 | /// \p Element occurs in the given range \p Range. |
1107 | template <typename R, typename E> |
1108 | auto count(R &&Range, const E &Element) -> |
1109 | typename std::iterator_traits<decltype(adl_begin(Range))>::difference_type { |
1110 | return std::count(adl_begin(Range), adl_end(Range), Element); |
1111 | } |
1112 | |
1113 | /// Wrapper function around std::count_if to count the number of times an |
1114 | /// element satisfying a given predicate occurs in a range. |
1115 | template <typename R, typename UnaryPredicate> |
1116 | auto count_if(R &&Range, UnaryPredicate P) -> |
1117 | typename std::iterator_traits<decltype(adl_begin(Range))>::difference_type { |
1118 | return std::count_if(adl_begin(Range), adl_end(Range), P); |
1119 | } |
1120 | |
1121 | /// Wrapper function around std::transform to apply a function to a range and |
1122 | /// store the result elsewhere. |
1123 | template <typename R, typename OutputIt, typename UnaryPredicate> |
1124 | OutputIt transform(R &&Range, OutputIt d_first, UnaryPredicate P) { |
1125 | return std::transform(adl_begin(Range), adl_end(Range), d_first, P); |
1126 | } |
1127 | |
1128 | /// Provide wrappers to std::partition which take ranges instead of having to |
1129 | /// pass begin/end explicitly. |
1130 | template <typename R, typename UnaryPredicate> |
1131 | auto partition(R &&Range, UnaryPredicate P) -> decltype(adl_begin(Range)) { |
1132 | return std::partition(adl_begin(Range), adl_end(Range), P); |
1133 | } |
1134 | |
1135 | /// Provide wrappers to std::lower_bound which take ranges instead of having to |
1136 | /// pass begin/end explicitly. |
1137 | template <typename R, typename ForwardIt> |
1138 | auto lower_bound(R &&Range, ForwardIt I) -> decltype(adl_begin(Range)) { |
1139 | return std::lower_bound(adl_begin(Range), adl_end(Range), I); |
1140 | } |
1141 | |
1142 | template <typename R, typename ForwardIt, typename Compare> |
1143 | auto lower_bound(R &&Range, ForwardIt I, Compare C) |
1144 | -> decltype(adl_begin(Range)) { |
1145 | return std::lower_bound(adl_begin(Range), adl_end(Range), I, C); |
1146 | } |
1147 | |
1148 | /// Provide wrappers to std::upper_bound which take ranges instead of having to |
1149 | /// pass begin/end explicitly. |
1150 | template <typename R, typename ForwardIt> |
1151 | auto upper_bound(R &&Range, ForwardIt I) -> decltype(adl_begin(Range)) { |
1152 | return std::upper_bound(adl_begin(Range), adl_end(Range), I); |
1153 | } |
1154 | |
1155 | template <typename R, typename ForwardIt, typename Compare> |
1156 | auto upper_bound(R &&Range, ForwardIt I, Compare C) |
1157 | -> decltype(adl_begin(Range)) { |
1158 | return std::upper_bound(adl_begin(Range), adl_end(Range), I, C); |
1159 | } |
1160 | /// Wrapper function around std::equal to detect if all elements |
1161 | /// in a container are same. |
1162 | template <typename R> |
1163 | bool is_splat(R &&Range) { |
1164 | size_t range_size = size(Range); |
1165 | return range_size != 0 && (range_size == 1 || |
1166 | std::equal(adl_begin(Range) + 1, adl_end(Range), adl_begin(Range))); |
1167 | } |
1168 | |
1169 | /// Given a range of type R, iterate the entire range and return a |
1170 | /// SmallVector with elements of the vector. This is useful, for example, |
1171 | /// when you want to iterate a range and then sort the results. |
1172 | template <unsigned Size, typename R> |
1173 | SmallVector<typename std::remove_const<detail::ValueOfRange<R>>::type, Size> |
1174 | to_vector(R &&Range) { |
1175 | return {adl_begin(Range), adl_end(Range)}; |
1176 | } |
1177 | |
1178 | /// Provide a container algorithm similar to C++ Library Fundamentals v2's |
1179 | /// `erase_if` which is equivalent to: |
1180 | /// |
1181 | /// C.erase(remove_if(C, pred), C.end()); |
1182 | /// |
1183 | /// This version works for any container with an erase method call accepting |
1184 | /// two iterators. |
1185 | template <typename Container, typename UnaryPredicate> |
1186 | void erase_if(Container &C, UnaryPredicate P) { |
1187 | C.erase(remove_if(C, P), C.end()); |
1188 | } |
1189 | |
1190 | //===----------------------------------------------------------------------===// |
1191 | // Extra additions to <memory> |
1192 | //===----------------------------------------------------------------------===// |
1193 | |
1194 | // Implement make_unique according to N3656. |
1195 | |
1196 | /// Constructs a `new T()` with the given args and returns a |
1197 | /// `unique_ptr<T>` which owns the object. |
1198 | /// |
1199 | /// Example: |
1200 | /// |
1201 | /// auto p = make_unique<int>(); |
1202 | /// auto p = make_unique<std::tuple<int, int>>(0, 1); |
1203 | template <class T, class... Args> |
1204 | typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type |
1205 | make_unique(Args &&... args) { |
1206 | return std::unique_ptr<T>(new T(std::forward<Args>(args)...)); |
1207 | } |
1208 | |
1209 | /// Constructs a `new T[n]` with the given args and returns a |
1210 | /// `unique_ptr<T[]>` which owns the object. |
1211 | /// |
1212 | /// \param n size of the new array. |
1213 | /// |
1214 | /// Example: |
1215 | /// |
1216 | /// auto p = make_unique<int[]>(2); // value-initializes the array with 0's. |
1217 | template <class T> |
1218 | typename std::enable_if<std::is_array<T>::value && std::extent<T>::value == 0, |
1219 | std::unique_ptr<T>>::type |
1220 | make_unique(size_t n) { |
1221 | return std::unique_ptr<T>(new typename std::remove_extent<T>::type[n]()); |
1222 | } |
1223 | |
1224 | /// This function isn't used and is only here to provide better compile errors. |
1225 | template <class T, class... Args> |
1226 | typename std::enable_if<std::extent<T>::value != 0>::type |
1227 | make_unique(Args &&...) = delete; |
1228 | |
1229 | struct FreeDeleter { |
1230 | void operator()(void* v) { |
1231 | ::free(v); |
1232 | } |
1233 | }; |
1234 | |
1235 | template<typename First, typename Second> |
1236 | struct pair_hash { |
1237 | size_t operator()(const std::pair<First, Second> &P) const { |
1238 | return std::hash<First>()(P.first) * 31 + std::hash<Second>()(P.second); |
1239 | } |
1240 | }; |
1241 | |
1242 | /// A functor like C++14's std::less<void> in its absence. |
1243 | struct less { |
1244 | template <typename A, typename B> bool operator()(A &&a, B &&b) const { |
1245 | return std::forward<A>(a) < std::forward<B>(b); |
1246 | } |
1247 | }; |
1248 | |
1249 | /// A functor like C++14's std::equal<void> in its absence. |
1250 | struct equal { |
1251 | template <typename A, typename B> bool operator()(A &&a, B &&b) const { |
1252 | return std::forward<A>(a) == std::forward<B>(b); |
1253 | } |
1254 | }; |
1255 | |
1256 | /// Binary functor that adapts to any other binary functor after dereferencing |
1257 | /// operands. |
1258 | template <typename T> struct deref { |
1259 | T func; |
1260 | |
1261 | // Could be further improved to cope with non-derivable functors and |
1262 | // non-binary functors (should be a variadic template member function |
1263 | // operator()). |
1264 | template <typename A, typename B> |
1265 | auto operator()(A &lhs, B &rhs) const -> decltype(func(*lhs, *rhs)) { |
1266 | assert(lhs)((lhs) ? static_cast<void> (0) : __assert_fail ("lhs", "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 1266, __PRETTY_FUNCTION__)); |
1267 | assert(rhs)((rhs) ? static_cast<void> (0) : __assert_fail ("rhs", "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 1267, __PRETTY_FUNCTION__)); |
1268 | return func(*lhs, *rhs); |
1269 | } |
1270 | }; |
1271 | |
1272 | namespace detail { |
1273 | |
1274 | template <typename R> class enumerator_iter; |
1275 | |
1276 | template <typename R> struct result_pair { |
1277 | friend class enumerator_iter<R>; |
1278 | |
1279 | result_pair() = default; |
1280 | result_pair(std::size_t Index, IterOfRange<R> Iter) |
1281 | : Index(Index), Iter(Iter) {} |
1282 | |
1283 | result_pair<R> &operator=(const result_pair<R> &Other) { |
1284 | Index = Other.Index; |
1285 | Iter = Other.Iter; |
1286 | return *this; |
1287 | } |
1288 | |
1289 | std::size_t index() const { return Index; } |
1290 | const ValueOfRange<R> &value() const { return *Iter; } |
1291 | ValueOfRange<R> &value() { return *Iter; } |
1292 | |
1293 | private: |
1294 | std::size_t Index = std::numeric_limits<std::size_t>::max(); |
1295 | IterOfRange<R> Iter; |
1296 | }; |
1297 | |
1298 | template <typename R> |
1299 | class enumerator_iter |
1300 | : public iterator_facade_base< |
1301 | enumerator_iter<R>, std::forward_iterator_tag, result_pair<R>, |
1302 | typename std::iterator_traits<IterOfRange<R>>::difference_type, |
1303 | typename std::iterator_traits<IterOfRange<R>>::pointer, |
1304 | typename std::iterator_traits<IterOfRange<R>>::reference> { |
1305 | using result_type = result_pair<R>; |
1306 | |
1307 | public: |
1308 | explicit enumerator_iter(IterOfRange<R> EndIter) |
1309 | : Result(std::numeric_limits<size_t>::max(), EndIter) {} |
1310 | |
1311 | enumerator_iter(std::size_t Index, IterOfRange<R> Iter) |
1312 | : Result(Index, Iter) {} |
1313 | |
1314 | result_type &operator*() { return Result; } |
1315 | const result_type &operator*() const { return Result; } |
1316 | |
1317 | enumerator_iter<R> &operator++() { |
1318 | assert(Result.Index != std::numeric_limits<size_t>::max())((Result.Index != std::numeric_limits<size_t>::max()) ? static_cast<void> (0) : __assert_fail ("Result.Index != std::numeric_limits<size_t>::max()" , "/build/llvm-toolchain-snapshot-8~svn345461/include/llvm/ADT/STLExtras.h" , 1318, __PRETTY_FUNCTION__)); |
1319 | ++Result.Iter; |
1320 | ++Result.Index; |
1321 | return *this; |
1322 | } |
1323 | |
1324 | bool operator==(const enumerator_iter<R> &RHS) const { |
1325 | // Don't compare indices here, only iterators. It's possible for an end |
1326 | // iterator to have different indices depending on whether it was created |
1327 | // by calling std::end() versus incrementing a valid iterator. |
1328 | return Result.Iter == RHS.Result.Iter; |
1329 | } |
1330 | |
1331 | enumerator_iter<R> &operator=(const enumerator_iter<R> &Other) { |
1332 | Result = Other.Result; |
1333 | return *this; |
1334 | } |
1335 | |
1336 | private: |
1337 | result_type Result; |
1338 | }; |
1339 | |
1340 | template <typename R> class enumerator { |
1341 | public: |
1342 | explicit enumerator(R &&Range) : TheRange(std::forward<R>(Range)) {} |
1343 | |
1344 | enumerator_iter<R> begin() { |
1345 | return enumerator_iter<R>(0, std::begin(TheRange)); |
1346 | } |
1347 | |
1348 | enumerator_iter<R> end() { |
1349 | return enumerator_iter<R>(std::end(TheRange)); |
1350 | } |
1351 | |
1352 | private: |
1353 | R TheRange; |
1354 | }; |
1355 | |
1356 | } // end namespace detail |
1357 | |
1358 | /// Given an input range, returns a new range whose values are are pair (A,B) |
1359 | /// such that A is the 0-based index of the item in the sequence, and B is |
1360 | /// the value from the original sequence. Example: |
1361 | /// |
1362 | /// std::vector<char> Items = {'A', 'B', 'C', 'D'}; |
1363 | /// for (auto X : enumerate(Items)) { |
1364 | /// printf("Item %d - %c\n", X.index(), X.value()); |
1365 | /// } |
1366 | /// |
1367 | /// Output: |
1368 | /// Item 0 - A |
1369 | /// Item 1 - B |
1370 | /// Item 2 - C |
1371 | /// Item 3 - D |
1372 | /// |
1373 | template <typename R> detail::enumerator<R> enumerate(R &&TheRange) { |
1374 | return detail::enumerator<R>(std::forward<R>(TheRange)); |
1375 | } |
1376 | |
1377 | namespace detail { |
1378 | |
1379 | template <typename F, typename Tuple, std::size_t... I> |
1380 | auto apply_tuple_impl(F &&f, Tuple &&t, index_sequence<I...>) |
1381 | -> decltype(std::forward<F>(f)(std::get<I>(std::forward<Tuple>(t))...)) { |
1382 | return std::forward<F>(f)(std::get<I>(std::forward<Tuple>(t))...); |
1383 | } |
1384 | |
1385 | } // end namespace detail |
1386 | |
1387 | /// Given an input tuple (a1, a2, ..., an), pass the arguments of the |
1388 | /// tuple variadically to f as if by calling f(a1, a2, ..., an) and |
1389 | /// return the result. |
1390 | template <typename F, typename Tuple> |
1391 | auto apply_tuple(F &&f, Tuple &&t) -> decltype(detail::apply_tuple_impl( |
1392 | std::forward<F>(f), std::forward<Tuple>(t), |
1393 | build_index_impl< |
1394 | std::tuple_size<typename std::decay<Tuple>::type>::value>{})) { |
1395 | using Indices = build_index_impl< |
1396 | std::tuple_size<typename std::decay<Tuple>::type>::value>; |
1397 | |
1398 | return detail::apply_tuple_impl(std::forward<F>(f), std::forward<Tuple>(t), |
1399 | Indices{}); |
1400 | } |
1401 | |
1402 | } // end namespace llvm |
1403 | |
1404 | #endif // LLVM_ADT_STLEXTRAS_H |