1 //===- llvm-profdata.cpp - LLVM profile data tool -------------------------===//
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 // llvm-profdata merges .profdata files.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/ADT/SmallSet.h"
15 #include "llvm/ADT/SmallVector.h"
16 #include "llvm/ADT/StringRef.h"
17 #include "llvm/IR/LLVMContext.h"
18 #include "llvm/ProfileData/InstrProfReader.h"
19 #include "llvm/ProfileData/InstrProfWriter.h"
20 #include "llvm/ProfileData/ProfileCommon.h"
21 #include "llvm/ProfileData/SampleProfReader.h"
22 #include "llvm/ProfileData/SampleProfWriter.h"
23 #include "llvm/Support/CommandLine.h"
24 #include "llvm/Support/Errc.h"
25 #include "llvm/Support/FileSystem.h"
26 #include "llvm/Support/Format.h"
27 #include "llvm/Support/ManagedStatic.h"
28 #include "llvm/Support/MemoryBuffer.h"
29 #include "llvm/Support/Path.h"
30 #include "llvm/Support/PrettyStackTrace.h"
31 #include "llvm/Support/Signals.h"
32 #include "llvm/Support/ThreadPool.h"
33 #include "llvm/Support/raw_ostream.h"
34 #include <algorithm>
35 
36 using namespace llvm;
37 
38 enum ProfileFormat { PF_None = 0, PF_Text, PF_Binary, PF_GCC };
39 
40 static void exitWithError(const Twine &Message, StringRef Whence = "",
41                           StringRef Hint = "") {
42   errs() << "error: ";
43   if (!Whence.empty())
44     errs() << Whence << ": ";
45   errs() << Message << "\n";
46   if (!Hint.empty())
47     errs() << Hint << "\n";
48   ::exit(1);
49 }
50 
51 static void exitWithError(Error E, StringRef Whence = "") {
52   if (E.isA<InstrProfError>()) {
53     handleAllErrors(std::move(E), [&](const InstrProfError &IPE) {
54       instrprof_error instrError = IPE.get();
55       StringRef Hint = "";
56       if (instrError == instrprof_error::unrecognized_format) {
57         // Hint for common error of forgetting -sample for sample profiles.
58         Hint = "Perhaps you forgot to use the -sample option?";
59       }
60       exitWithError(IPE.message(), Whence, Hint);
61     });
62   }
63 
64   exitWithError(toString(std::move(E)), Whence);
65 }
66 
67 static void exitWithErrorCode(std::error_code EC, StringRef Whence = "") {
68   exitWithError(EC.message(), Whence);
69 }
70 
71 namespace {
72 enum ProfileKinds { instr, sample };
73 }
74 
75 static void handleMergeWriterError(Error E, StringRef WhenceFile = "",
76                                    StringRef WhenceFunction = "",
77                                    bool ShowHint = true) {
78   if (!WhenceFile.empty())
79     errs() << WhenceFile << ": ";
80   if (!WhenceFunction.empty())
81     errs() << WhenceFunction << ": ";
82 
83   auto IPE = instrprof_error::success;
84   E = handleErrors(std::move(E),
85                    [&IPE](std::unique_ptr<InstrProfError> E) -> Error {
86                      IPE = E->get();
87                      return Error(std::move(E));
88                    });
89   errs() << toString(std::move(E)) << "\n";
90 
91   if (ShowHint) {
92     StringRef Hint = "";
93     if (IPE != instrprof_error::success) {
94       switch (IPE) {
95       case instrprof_error::hash_mismatch:
96       case instrprof_error::count_mismatch:
97       case instrprof_error::value_site_count_mismatch:
98         Hint = "Make sure that all profile data to be merged is generated "
99                "from the same binary.";
100         break;
101       default:
102         break;
103       }
104     }
105 
106     if (!Hint.empty())
107       errs() << Hint << "\n";
108   }
109 }
110 
111 struct WeightedFile {
112   std::string Filename;
113   uint64_t Weight;
114 };
115 typedef SmallVector<WeightedFile, 5> WeightedFileVector;
116 
117 /// Keep track of merged data and reported errors.
118 struct WriterContext {
119   std::mutex Lock;
120   InstrProfWriter Writer;
121   Error Err;
122   StringRef ErrWhence;
123   std::mutex &ErrLock;
124   SmallSet<instrprof_error, 4> &WriterErrorCodes;
125 
126   WriterContext(bool IsSparse, std::mutex &ErrLock,
127                 SmallSet<instrprof_error, 4> &WriterErrorCodes)
128       : Lock(), Writer(IsSparse), Err(Error::success()), ErrWhence(""),
129         ErrLock(ErrLock), WriterErrorCodes(WriterErrorCodes) {}
130 };
131 
132 /// Load an input into a writer context.
133 static void loadInput(const WeightedFile &Input, WriterContext *WC) {
134   std::unique_lock<std::mutex> CtxGuard{WC->Lock};
135 
136   // If there's a pending hard error, don't do more work.
137   if (WC->Err)
138     return;
139 
140   WC->ErrWhence = Input.Filename;
141 
142   auto ReaderOrErr = InstrProfReader::create(Input.Filename);
143   if (Error E = ReaderOrErr.takeError()) {
144     // Skip the empty profiles by returning sliently.
145     instrprof_error IPE = InstrProfError::take(std::move(E));
146     if (IPE != instrprof_error::empty_raw_profile)
147       WC->Err = make_error<InstrProfError>(IPE);
148     return;
149   }
150 
151   auto Reader = std::move(ReaderOrErr.get());
152   bool IsIRProfile = Reader->isIRLevelProfile();
153   if (WC->Writer.setIsIRLevelProfile(IsIRProfile)) {
154     WC->Err = make_error<StringError>(
155         "Merge IR generated profile with Clang generated profile.",
156         std::error_code());
157     return;
158   }
159 
160   for (auto &I : *Reader) {
161     const StringRef FuncName = I.Name;
162     if (Error E = WC->Writer.addRecord(std::move(I), Input.Weight)) {
163       // Only show hint the first time an error occurs.
164       instrprof_error IPE = InstrProfError::take(std::move(E));
165       std::unique_lock<std::mutex> ErrGuard{WC->ErrLock};
166       bool firstTime = WC->WriterErrorCodes.insert(IPE).second;
167       handleMergeWriterError(make_error<InstrProfError>(IPE), Input.Filename,
168                              FuncName, firstTime);
169     }
170   }
171   if (Reader->hasError())
172     WC->Err = Reader->getError();
173 }
174 
175 /// Merge the \p Src writer context into \p Dst.
176 static void mergeWriterContexts(WriterContext *Dst, WriterContext *Src) {
177   if (Error E = Dst->Writer.mergeRecordsFromWriter(std::move(Src->Writer)))
178     Dst->Err = std::move(E);
179 }
180 
181 static void mergeInstrProfile(const WeightedFileVector &Inputs,
182                               StringRef OutputFilename,
183                               ProfileFormat OutputFormat, bool OutputSparse,
184                               unsigned NumThreads) {
185   if (OutputFilename.compare("-") == 0)
186     exitWithError("Cannot write indexed profdata format to stdout.");
187 
188   if (OutputFormat != PF_Binary && OutputFormat != PF_Text)
189     exitWithError("Unknown format is specified.");
190 
191   std::error_code EC;
192   raw_fd_ostream Output(OutputFilename.data(), EC, sys::fs::F_None);
193   if (EC)
194     exitWithErrorCode(EC, OutputFilename);
195 
196   std::mutex ErrorLock;
197   SmallSet<instrprof_error, 4> WriterErrorCodes;
198 
199   // If NumThreads is not specified, auto-detect a good default.
200   if (NumThreads == 0)
201     NumThreads = std::max(1U, std::min(std::thread::hardware_concurrency(),
202                                        unsigned(Inputs.size() / 2)));
203 
204   // Initialize the writer contexts.
205   SmallVector<std::unique_ptr<WriterContext>, 4> Contexts;
206   for (unsigned I = 0; I < NumThreads; ++I)
207     Contexts.emplace_back(llvm::make_unique<WriterContext>(
208         OutputSparse, ErrorLock, WriterErrorCodes));
209 
210   if (NumThreads == 1) {
211     for (const auto &Input : Inputs)
212       loadInput(Input, Contexts[0].get());
213   } else {
214     ThreadPool Pool(NumThreads);
215 
216     // Load the inputs in parallel (N/NumThreads serial steps).
217     unsigned Ctx = 0;
218     for (const auto &Input : Inputs) {
219       Pool.async(loadInput, Input, Contexts[Ctx].get());
220       Ctx = (Ctx + 1) % NumThreads;
221     }
222     Pool.wait();
223 
224     // Merge the writer contexts together (~ lg(NumThreads) serial steps).
225     unsigned Mid = Contexts.size() / 2;
226     unsigned End = Contexts.size();
227     assert(Mid > 0 && "Expected more than one context");
228     do {
229       for (unsigned I = 0; I < Mid; ++I)
230         Pool.async(mergeWriterContexts, Contexts[I].get(),
231                    Contexts[I + Mid].get());
232       Pool.wait();
233       if (End & 1) {
234         Pool.async(mergeWriterContexts, Contexts[0].get(),
235                    Contexts[End - 1].get());
236         Pool.wait();
237       }
238       End = Mid;
239       Mid /= 2;
240     } while (Mid > 0);
241   }
242 
243   // Handle deferred hard errors encountered during merging.
244   for (std::unique_ptr<WriterContext> &WC : Contexts)
245     if (WC->Err)
246       exitWithError(std::move(WC->Err), WC->ErrWhence);
247 
248   InstrProfWriter &Writer = Contexts[0]->Writer;
249   if (OutputFormat == PF_Text)
250     Writer.writeText(Output);
251   else
252     Writer.write(Output);
253 }
254 
255 static sampleprof::SampleProfileFormat FormatMap[] = {
256     sampleprof::SPF_None, sampleprof::SPF_Text, sampleprof::SPF_Binary,
257     sampleprof::SPF_GCC};
258 
259 static void mergeSampleProfile(const WeightedFileVector &Inputs,
260                                StringRef OutputFilename,
261                                ProfileFormat OutputFormat) {
262   using namespace sampleprof;
263   auto WriterOrErr =
264       SampleProfileWriter::create(OutputFilename, FormatMap[OutputFormat]);
265   if (std::error_code EC = WriterOrErr.getError())
266     exitWithErrorCode(EC, OutputFilename);
267 
268   auto Writer = std::move(WriterOrErr.get());
269   StringMap<FunctionSamples> ProfileMap;
270   SmallVector<std::unique_ptr<sampleprof::SampleProfileReader>, 5> Readers;
271   LLVMContext Context;
272   for (const auto &Input : Inputs) {
273     auto ReaderOrErr = SampleProfileReader::create(Input.Filename, Context);
274     if (std::error_code EC = ReaderOrErr.getError())
275       exitWithErrorCode(EC, Input.Filename);
276 
277     // We need to keep the readers around until after all the files are
278     // read so that we do not lose the function names stored in each
279     // reader's memory. The function names are needed to write out the
280     // merged profile map.
281     Readers.push_back(std::move(ReaderOrErr.get()));
282     const auto Reader = Readers.back().get();
283     if (std::error_code EC = Reader->read())
284       exitWithErrorCode(EC, Input.Filename);
285 
286     StringMap<FunctionSamples> &Profiles = Reader->getProfiles();
287     for (StringMap<FunctionSamples>::iterator I = Profiles.begin(),
288                                               E = Profiles.end();
289          I != E; ++I) {
290       StringRef FName = I->first();
291       FunctionSamples &Samples = I->second;
292       sampleprof_error Result = ProfileMap[FName].merge(Samples, Input.Weight);
293       if (Result != sampleprof_error::success) {
294         std::error_code EC = make_error_code(Result);
295         handleMergeWriterError(errorCodeToError(EC), Input.Filename, FName);
296       }
297     }
298   }
299   Writer->write(ProfileMap);
300 }
301 
302 static WeightedFile parseWeightedFile(const StringRef &WeightedFilename) {
303   StringRef WeightStr, FileName;
304   std::tie(WeightStr, FileName) = WeightedFilename.split(',');
305 
306   uint64_t Weight;
307   if (WeightStr.getAsInteger(10, Weight) || Weight < 1)
308     exitWithError("Input weight must be a positive integer.");
309 
310   return {FileName, Weight};
311 }
312 
313 static std::unique_ptr<MemoryBuffer>
314 getInputFilenamesFileBuf(const StringRef &InputFilenamesFile) {
315   if (InputFilenamesFile == "")
316     return {};
317 
318   auto BufOrError = MemoryBuffer::getFileOrSTDIN(InputFilenamesFile);
319   if (!BufOrError)
320     exitWithErrorCode(BufOrError.getError(), InputFilenamesFile);
321 
322   return std::move(*BufOrError);
323 }
324 
325 static void addWeightedInput(WeightedFileVector &WNI, const WeightedFile &WF) {
326   StringRef Filename = WF.Filename;
327   uint64_t Weight = WF.Weight;
328 
329   // If it's STDIN just pass it on.
330   if (Filename == "-") {
331     WNI.push_back({Filename, Weight});
332     return;
333   }
334 
335   llvm::sys::fs::file_status Status;
336   llvm::sys::fs::status(Filename, Status);
337   if (!llvm::sys::fs::exists(Status))
338     exitWithErrorCode(make_error_code(errc::no_such_file_or_directory),
339                       Filename);
340   // If it's a source file, collect it.
341   if (llvm::sys::fs::is_regular_file(Status)) {
342     WNI.push_back({Filename, Weight});
343     return;
344   }
345 
346   if (llvm::sys::fs::is_directory(Status)) {
347     std::error_code EC;
348     for (llvm::sys::fs::recursive_directory_iterator F(Filename, EC), E;
349          F != E && !EC; F.increment(EC)) {
350       if (llvm::sys::fs::is_regular_file(F->path())) {
351         addWeightedInput(WNI, {F->path(), Weight});
352       }
353     }
354     if (EC)
355       exitWithErrorCode(EC, Filename);
356   }
357 }
358 
359 static void parseInputFilenamesFile(MemoryBuffer *Buffer,
360                                     WeightedFileVector &WFV) {
361   if (!Buffer)
362     return;
363 
364   SmallVector<StringRef, 8> Entries;
365   StringRef Data = Buffer->getBuffer();
366   Data.split(Entries, '\n', /*MaxSplit=*/-1, /*KeepEmpty=*/false);
367   for (const StringRef &FileWeightEntry : Entries) {
368     StringRef SanitizedEntry = FileWeightEntry.trim(" \t\v\f\r");
369     // Skip comments.
370     if (SanitizedEntry.startswith("#"))
371       continue;
372     // If there's no comma, it's an unweighted profile.
373     else if (SanitizedEntry.find(',') == StringRef::npos)
374       addWeightedInput(WFV, {SanitizedEntry, 1});
375     else
376       addWeightedInput(WFV, parseWeightedFile(SanitizedEntry));
377   }
378 }
379 
380 static int merge_main(int argc, const char *argv[]) {
381   cl::list<std::string> InputFilenames(cl::Positional,
382                                        cl::desc("<filename...>"));
383   cl::list<std::string> WeightedInputFilenames("weighted-input",
384                                                cl::desc("<weight>,<filename>"));
385   cl::opt<std::string> InputFilenamesFile(
386       "input-files", cl::init(""),
387       cl::desc("Path to file containing newline-separated "
388                "[<weight>,]<filename> entries"));
389   cl::alias InputFilenamesFileA("f", cl::desc("Alias for --input-files"),
390                                 cl::aliasopt(InputFilenamesFile));
391   cl::opt<bool> DumpInputFileList(
392       "dump-input-file-list", cl::init(false), cl::Hidden,
393       cl::desc("Dump the list of input files and their weights, then exit"));
394   cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
395                                       cl::init("-"), cl::Required,
396                                       cl::desc("Output file"));
397   cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
398                             cl::aliasopt(OutputFilename));
399   cl::opt<ProfileKinds> ProfileKind(
400       cl::desc("Profile kind:"), cl::init(instr),
401       cl::values(clEnumVal(instr, "Instrumentation profile (default)"),
402                  clEnumVal(sample, "Sample profile")));
403   cl::opt<ProfileFormat> OutputFormat(
404       cl::desc("Format of output profile"), cl::init(PF_Binary),
405       cl::values(clEnumValN(PF_Binary, "binary", "Binary encoding (default)"),
406                  clEnumValN(PF_Text, "text", "Text encoding"),
407                  clEnumValN(PF_GCC, "gcc",
408                             "GCC encoding (only meaningful for -sample)")));
409   cl::opt<bool> OutputSparse("sparse", cl::init(false),
410       cl::desc("Generate a sparse profile (only meaningful for -instr)"));
411   cl::opt<unsigned> NumThreads(
412       "num-threads", cl::init(0),
413       cl::desc("Number of merge threads to use (default: autodetect)"));
414   cl::alias NumThreadsA("j", cl::desc("Alias for --num-threads"),
415                         cl::aliasopt(NumThreads));
416 
417   cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
418 
419   WeightedFileVector WeightedInputs;
420   for (StringRef Filename : InputFilenames)
421     addWeightedInput(WeightedInputs, {Filename, 1});
422   for (StringRef WeightedFilename : WeightedInputFilenames)
423     addWeightedInput(WeightedInputs, parseWeightedFile(WeightedFilename));
424 
425   // Make sure that the file buffer stays alive for the duration of the
426   // weighted input vector's lifetime.
427   auto Buffer = getInputFilenamesFileBuf(InputFilenamesFile);
428   parseInputFilenamesFile(Buffer.get(), WeightedInputs);
429 
430   if (WeightedInputs.empty())
431     exitWithError("No input files specified. See " +
432                   sys::path::filename(argv[0]) + " -help");
433 
434   if (DumpInputFileList) {
435     for (auto &WF : WeightedInputs)
436       outs() << WF.Weight << "," << WF.Filename << "\n";
437     return 0;
438   }
439 
440   if (ProfileKind == instr)
441     mergeInstrProfile(WeightedInputs, OutputFilename, OutputFormat,
442                       OutputSparse, NumThreads);
443   else
444     mergeSampleProfile(WeightedInputs, OutputFilename, OutputFormat);
445 
446   return 0;
447 }
448 
449 static int showInstrProfile(const std::string &Filename, bool ShowCounts,
450                             bool ShowIndirectCallTargets,
451                             bool ShowDetailedSummary,
452                             std::vector<uint32_t> DetailedSummaryCutoffs,
453                             bool ShowAllFunctions,
454                             const std::string &ShowFunction, bool TextFormat,
455                             raw_fd_ostream &OS) {
456   auto ReaderOrErr = InstrProfReader::create(Filename);
457   std::vector<uint32_t> Cutoffs = std::move(DetailedSummaryCutoffs);
458   if (ShowDetailedSummary && Cutoffs.empty()) {
459     Cutoffs = {800000, 900000, 950000, 990000, 999000, 999900, 999990};
460   }
461   InstrProfSummaryBuilder Builder(std::move(Cutoffs));
462   if (Error E = ReaderOrErr.takeError())
463     exitWithError(std::move(E), Filename);
464 
465   auto Reader = std::move(ReaderOrErr.get());
466   bool IsIRInstr = Reader->isIRLevelProfile();
467   size_t ShownFunctions = 0;
468   uint64_t TotalNumValueSites = 0;
469   uint64_t TotalNumValueSitesWithValueProfile = 0;
470   uint64_t TotalNumValues = 0;
471   std::vector<unsigned> ICHistogram;
472   for (const auto &Func : *Reader) {
473     bool Show =
474         ShowAllFunctions || (!ShowFunction.empty() &&
475                              Func.Name.find(ShowFunction) != Func.Name.npos);
476 
477     bool doTextFormatDump = (Show && ShowCounts && TextFormat);
478 
479     if (doTextFormatDump) {
480       InstrProfSymtab &Symtab = Reader->getSymtab();
481       InstrProfWriter::writeRecordInText(Func, Symtab, OS);
482       continue;
483     }
484 
485     assert(Func.Counts.size() > 0 && "function missing entry counter");
486     Builder.addRecord(Func);
487 
488     if (Show) {
489 
490       if (!ShownFunctions)
491         OS << "Counters:\n";
492 
493       ++ShownFunctions;
494 
495       OS << "  " << Func.Name << ":\n"
496          << "    Hash: " << format("0x%016" PRIx64, Func.Hash) << "\n"
497          << "    Counters: " << Func.Counts.size() << "\n";
498       if (!IsIRInstr)
499         OS << "    Function count: " << Func.Counts[0] << "\n";
500 
501       if (ShowIndirectCallTargets)
502         OS << "    Indirect Call Site Count: "
503            << Func.getNumValueSites(IPVK_IndirectCallTarget) << "\n";
504 
505       if (ShowCounts) {
506         OS << "    Block counts: [";
507         size_t Start = (IsIRInstr ? 0 : 1);
508         for (size_t I = Start, E = Func.Counts.size(); I < E; ++I) {
509           OS << (I == Start ? "" : ", ") << Func.Counts[I];
510         }
511         OS << "]\n";
512       }
513 
514       if (ShowIndirectCallTargets) {
515         InstrProfSymtab &Symtab = Reader->getSymtab();
516         uint32_t NS = Func.getNumValueSites(IPVK_IndirectCallTarget);
517         OS << "    Indirect Target Results: \n";
518         TotalNumValueSites += NS;
519         for (size_t I = 0; I < NS; ++I) {
520           uint32_t NV = Func.getNumValueDataForSite(IPVK_IndirectCallTarget, I);
521           std::unique_ptr<InstrProfValueData[]> VD =
522               Func.getValueForSite(IPVK_IndirectCallTarget, I);
523           TotalNumValues += NV;
524           if (NV) {
525             TotalNumValueSitesWithValueProfile++;
526             if (NV > ICHistogram.size())
527               ICHistogram.resize(NV, 0);
528             ICHistogram[NV - 1]++;
529           }
530           for (uint32_t V = 0; V < NV; V++) {
531             OS << "\t[ " << I << ", ";
532             OS << Symtab.getFuncName(VD[V].Value) << ", " << VD[V].Count
533                << " ]\n";
534           }
535         }
536       }
537     }
538   }
539   if (Reader->hasError())
540     exitWithError(Reader->getError(), Filename);
541 
542   if (ShowCounts && TextFormat)
543     return 0;
544   std::unique_ptr<ProfileSummary> PS(Builder.getSummary());
545   if (ShowAllFunctions || !ShowFunction.empty())
546     OS << "Functions shown: " << ShownFunctions << "\n";
547   OS << "Total functions: " << PS->getNumFunctions() << "\n";
548   OS << "Maximum function count: " << PS->getMaxFunctionCount() << "\n";
549   OS << "Maximum internal block count: " << PS->getMaxInternalCount() << "\n";
550   if (ShownFunctions && ShowIndirectCallTargets) {
551     OS << "Total Number of Indirect Call Sites : " << TotalNumValueSites
552        << "\n";
553     OS << "Total Number of Sites With Values : "
554        << TotalNumValueSitesWithValueProfile << "\n";
555     OS << "Total Number of Profiled Values : " << TotalNumValues << "\n";
556 
557     OS << "IC Value histogram : \n\tNumTargets, SiteCount\n";
558     for (unsigned I = 0; I < ICHistogram.size(); I++) {
559       OS << "\t" << I + 1 << ", " << ICHistogram[I] << "\n";
560     }
561   }
562 
563   if (ShowDetailedSummary) {
564     OS << "Detailed summary:\n";
565     OS << "Total number of blocks: " << PS->getNumCounts() << "\n";
566     OS << "Total count: " << PS->getTotalCount() << "\n";
567     for (auto Entry : PS->getDetailedSummary()) {
568       OS << Entry.NumCounts << " blocks with count >= " << Entry.MinCount
569          << " account for "
570          << format("%0.6g", (float)Entry.Cutoff / ProfileSummary::Scale * 100)
571          << " percentage of the total counts.\n";
572     }
573   }
574   return 0;
575 }
576 
577 static int showSampleProfile(const std::string &Filename, bool ShowCounts,
578                              bool ShowAllFunctions,
579                              const std::string &ShowFunction,
580                              raw_fd_ostream &OS) {
581   using namespace sampleprof;
582   LLVMContext Context;
583   auto ReaderOrErr = SampleProfileReader::create(Filename, Context);
584   if (std::error_code EC = ReaderOrErr.getError())
585     exitWithErrorCode(EC, Filename);
586 
587   auto Reader = std::move(ReaderOrErr.get());
588   if (std::error_code EC = Reader->read())
589     exitWithErrorCode(EC, Filename);
590 
591   if (ShowAllFunctions || ShowFunction.empty())
592     Reader->dump(OS);
593   else
594     Reader->dumpFunctionProfile(ShowFunction, OS);
595 
596   return 0;
597 }
598 
599 static int show_main(int argc, const char *argv[]) {
600   cl::opt<std::string> Filename(cl::Positional, cl::Required,
601                                 cl::desc("<profdata-file>"));
602 
603   cl::opt<bool> ShowCounts("counts", cl::init(false),
604                            cl::desc("Show counter values for shown functions"));
605   cl::opt<bool> TextFormat(
606       "text", cl::init(false),
607       cl::desc("Show instr profile data in text dump format"));
608   cl::opt<bool> ShowIndirectCallTargets(
609       "ic-targets", cl::init(false),
610       cl::desc("Show indirect call site target values for shown functions"));
611   cl::opt<bool> ShowDetailedSummary("detailed-summary", cl::init(false),
612                                     cl::desc("Show detailed profile summary"));
613   cl::list<uint32_t> DetailedSummaryCutoffs(
614       cl::CommaSeparated, "detailed-summary-cutoffs",
615       cl::desc(
616           "Cutoff percentages (times 10000) for generating detailed summary"),
617       cl::value_desc("800000,901000,999999"));
618   cl::opt<bool> ShowAllFunctions("all-functions", cl::init(false),
619                                  cl::desc("Details for every function"));
620   cl::opt<std::string> ShowFunction("function",
621                                     cl::desc("Details for matching functions"));
622 
623   cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
624                                       cl::init("-"), cl::desc("Output file"));
625   cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
626                             cl::aliasopt(OutputFilename));
627   cl::opt<ProfileKinds> ProfileKind(
628       cl::desc("Profile kind:"), cl::init(instr),
629       cl::values(clEnumVal(instr, "Instrumentation profile (default)"),
630                  clEnumVal(sample, "Sample profile")));
631 
632   cl::ParseCommandLineOptions(argc, argv, "LLVM profile data summary\n");
633 
634   if (OutputFilename.empty())
635     OutputFilename = "-";
636 
637   std::error_code EC;
638   raw_fd_ostream OS(OutputFilename.data(), EC, sys::fs::F_Text);
639   if (EC)
640     exitWithErrorCode(EC, OutputFilename);
641 
642   if (ShowAllFunctions && !ShowFunction.empty())
643     errs() << "warning: -function argument ignored: showing all functions\n";
644 
645   std::vector<uint32_t> Cutoffs(DetailedSummaryCutoffs.begin(),
646                                 DetailedSummaryCutoffs.end());
647   if (ProfileKind == instr)
648     return showInstrProfile(Filename, ShowCounts, ShowIndirectCallTargets,
649                             ShowDetailedSummary, DetailedSummaryCutoffs,
650                             ShowAllFunctions, ShowFunction, TextFormat, OS);
651   else
652     return showSampleProfile(Filename, ShowCounts, ShowAllFunctions,
653                              ShowFunction, OS);
654 }
655 
656 int main(int argc, const char *argv[]) {
657   // Print a stack trace if we signal out.
658   sys::PrintStackTraceOnErrorSignal(argv[0]);
659   PrettyStackTraceProgram X(argc, argv);
660   llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
661 
662   StringRef ProgName(sys::path::filename(argv[0]));
663   if (argc > 1) {
664     int (*func)(int, const char *[]) = nullptr;
665 
666     if (strcmp(argv[1], "merge") == 0)
667       func = merge_main;
668     else if (strcmp(argv[1], "show") == 0)
669       func = show_main;
670 
671     if (func) {
672       std::string Invocation(ProgName.str() + " " + argv[1]);
673       argv[1] = Invocation.c_str();
674       return func(argc - 1, argv + 1);
675     }
676 
677     if (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "-help") == 0 ||
678         strcmp(argv[1], "--help") == 0) {
679 
680       errs() << "OVERVIEW: LLVM profile data tools\n\n"
681              << "USAGE: " << ProgName << " <command> [args...]\n"
682              << "USAGE: " << ProgName << " <command> -help\n\n"
683              << "See each individual command --help for more details.\n"
684              << "Available commands: merge, show\n";
685       return 0;
686     }
687   }
688 
689   if (argc < 2)
690     errs() << ProgName << ": No command specified!\n";
691   else
692     errs() << ProgName << ": Unknown command!\n";
693 
694   errs() << "USAGE: " << ProgName << " <merge|show> [args...]\n";
695   return 1;
696 }
697