src/llvm/tools/llvm-profdata/llvm-profdata.cpp

   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/StringRef.h"
  15 #include "llvm/IR/LLVMContext.h"
  16 #include "llvm/ProfileData/InstrProfReader.h"
  17 #include "llvm/ProfileData/InstrProfWriter.h"
  18 #include "llvm/ProfileData/SampleProfReader.h"
  19 #include "llvm/ProfileData/SampleProfWriter.h"
  20 #include "llvm/Support/CommandLine.h"
  21 #include "llvm/Support/FileSystem.h"
  22 #include "llvm/Support/Format.h"
  23 #include "llvm/Support/ManagedStatic.h"
  24 #include "llvm/Support/MemoryBuffer.h"
  25 #include "llvm/Support/PrettyStackTrace.h"
  26 #include "llvm/Support/Signals.h"
  27 #include "llvm/Support/raw_ostream.h"
  28
  29 using namespace llvm;
  30
  31 static void exitWithError(const Twine &Message, StringRef Whence = "") {
  32   errs() << "error: ";
  33   if (!Whence.empty())
  34     errs() << Whence << ": ";
  35   errs() << Message << "\n";
  36   ::exit(1);
  37 }
  38
  39 enum ProfileKinds { instr, sample };
  40
  41 void mergeInstrProfile(cl::list<std::string> Inputs, StringRef OutputFilename) {
  42   if (OutputFilename.compare("-") == 0)
  43     exitWithError("Cannot write indexed profdata format to stdout.");
  44
  45   std::error_code EC;
  46   raw_fd_ostream Output(OutputFilename.data(), EC, sys::fs::F_None);
  47   if (EC)
  48     exitWithError(EC.message(), OutputFilename);
  49
  50   InstrProfWriter Writer;
  51   for (const auto &Filename : Inputs) {
  52     auto ReaderOrErr = InstrProfReader::create(Filename);
  53     if (std::error_code ec = ReaderOrErr.getError())
  54       exitWithError(ec.message(), Filename);
  55
  56     auto Reader = std::move(ReaderOrErr.get());
  57     for (const auto &I : *Reader)
  58       if (std::error_code EC =
  59               Writer.addFunctionCounts(I.Name, I.Hash, I.Counts))
  60         errs() << Filename << ": " << I.Name << ": " << EC.message() << "\n";
  61     if (Reader->hasError())
  62       exitWithError(Reader->getError().message(), Filename);
  63   }
  64   Writer.write(Output);
  65 }
  66
  67 void mergeSampleProfile(cl::list<std::string> Inputs, StringRef OutputFilename,
  68                         sampleprof::SampleProfileFormat OutputFormat) {
  69   using namespace sampleprof;
  70   auto WriterOrErr = SampleProfileWriter::create(OutputFilename, OutputFormat);
  71   if (std::error_code EC = WriterOrErr.getError())
  72     exitWithError(EC.message(), OutputFilename);
  73
  74   auto Writer = std::move(WriterOrErr.get());
  75   StringMap<FunctionSamples> ProfileMap;
  76   for (const auto &Filename : Inputs) {
  77     auto ReaderOrErr =
  78         SampleProfileReader::create(Filename, getGlobalContext());
  79     if (std::error_code EC = ReaderOrErr.getError())
  80       exitWithError(EC.message(), Filename);
  81
  82     auto Reader = std::move(ReaderOrErr.get());
  83     if (std::error_code EC = Reader->read())
  84       exitWithError(EC.message(), Filename);
  85
  86     StringMap<FunctionSamples> &Profiles = Reader->getProfiles();
  87     for (StringMap<FunctionSamples>::iterator I = Profiles.begin(),
  88                                               E = Profiles.end();
  89          I != E; ++I) {
  90       StringRef FName = I->first();
  91       FunctionSamples &Samples = I->second;
  92       ProfileMap[FName].merge(Samples);
  93     }
  94   }
  95   Writer->write(ProfileMap);
  96 }
  97
  98 int merge_main(int argc, const char *argv[]) {
  99   cl::list<std::string> Inputs(cl::Positional, cl::Required, cl::OneOrMore,
 100                                cl::desc("<filenames...>"));
 101
 102   cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
 103                                       cl::init("-"), cl::Required,
 104                                       cl::desc("Output file"));
 105   cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
 106                             cl::aliasopt(OutputFilename));
 107   cl::opt<ProfileKinds> ProfileKind(
 108       cl::desc("Profile kind:"), cl::init(instr),
 109       cl::values(clEnumVal(instr, "Instrumentation profile (default)"),
 110                  clEnumVal(sample, "Sample profile"), clEnumValEnd));
 111
 112   cl::opt<sampleprof::SampleProfileFormat> OutputFormat(
 113       cl::desc("Format of output profile (only meaningful with --sample)"),
 114       cl::init(sampleprof::SPF_Binary),
 115       cl::values(clEnumValN(sampleprof::SPF_Binary, "binary",
 116                             "Binary encoding (default)"),
 117                  clEnumValN(sampleprof::SPF_Text, "text", "Text encoding"),
 118                  clEnumValN(sampleprof::SPF_GCC, "gcc", "GCC encoding"),
 119                  clEnumValEnd));
 120
 121   cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
 122
 123   if (ProfileKind == instr)
 124     mergeInstrProfile(Inputs, OutputFilename);
 125   else
 126     mergeSampleProfile(Inputs, OutputFilename, OutputFormat);
 127
 128   return 0;
 129 }
 130
 131 int showInstrProfile(std::string Filename, bool ShowCounts,
 132                      bool ShowAllFunctions, std::string ShowFunction,
 133                      raw_fd_ostream &OS) {
 134   auto ReaderOrErr = InstrProfReader::create(Filename);
 135   if (std::error_code EC = ReaderOrErr.getError())
 136     exitWithError(EC.message(), Filename);
 137
 138   auto Reader = std::move(ReaderOrErr.get());
 139   uint64_t MaxFunctionCount = 0, MaxBlockCount = 0;
 140   size_t ShownFunctions = 0, TotalFunctions = 0;
 141   for (const auto &Func : *Reader) {
 142     bool Show =
 143         ShowAllFunctions || (!ShowFunction.empty() &&
 144                              Func.Name.find(ShowFunction) != Func.Name.npos);
 145
 146     ++TotalFunctions;
 147     assert(Func.Counts.size() > 0 && "function missing entry counter");
 148     if (Func.Counts[0] > MaxFunctionCount)
 149       MaxFunctionCount = Func.Counts[0];
 150
 151     if (Show) {
 152       if (!ShownFunctions)
 153         OS << "Counters:\n";
 154       ++ShownFunctions;
 155
 156       OS << "  " << Func.Name << ":\n"
 157          << "    Hash: " << format("0x%016" PRIx64, Func.Hash) << "\n"
 158          << "    Counters: " << Func.Counts.size() << "\n"
 159          << "    Function count: " << Func.Counts[0] << "\n";
 160     }
 161
 162     if (Show && ShowCounts)
 163       OS << "    Block counts: [";
 164     for (size_t I = 1, E = Func.Counts.size(); I < E; ++I) {
 165       if (Func.Counts[I] > MaxBlockCount)
 166         MaxBlockCount = Func.Counts[I];
 167       if (Show && ShowCounts)
 168         OS << (I == 1 ? "" : ", ") << Func.Counts[I];
 169     }
 170     if (Show && ShowCounts)
 171       OS << "]\n";
 172   }
 173   if (Reader->hasError())
 174     exitWithError(Reader->getError().message(), Filename);
 175
 176   if (ShowAllFunctions || !ShowFunction.empty())
 177     OS << "Functions shown: " << ShownFunctions << "\n";
 178   OS << "Total functions: " << TotalFunctions << "\n";
 179   OS << "Maximum function count: " << MaxFunctionCount << "\n";
 180   OS << "Maximum internal block count: " << MaxBlockCount << "\n";
 181   return 0;
 182 }
 183
 184 int showSampleProfile(std::string Filename, bool ShowCounts,
 185                       bool ShowAllFunctions, std::string ShowFunction,
 186                       raw_fd_ostream &OS) {
 187   using namespace sampleprof;
 188   auto ReaderOrErr = SampleProfileReader::create(Filename, getGlobalContext());
 189   if (std::error_code EC = ReaderOrErr.getError())
 190     exitWithError(EC.message(), Filename);
 191
 192   auto Reader = std::move(ReaderOrErr.get());
 193   Reader->read();
 194   if (ShowAllFunctions || ShowFunction.empty())
 195     Reader->dump(OS);
 196   else
 197     Reader->dumpFunctionProfile(ShowFunction, OS);
 198
 199   return 0;
 200 }
 201
 202 int show_main(int argc, const char *argv[]) {
 203   cl::opt<std::string> Filename(cl::Positional, cl::Required,
 204                                 cl::desc("<profdata-file>"));
 205
 206   cl::opt<bool> ShowCounts("counts", cl::init(false),
 207                            cl::desc("Show counter values for shown functions"));
 208   cl::opt<bool> ShowAllFunctions("all-functions", cl::init(false),
 209                                  cl::desc("Details for every function"));
 210   cl::opt<std::string> ShowFunction("function",
 211                                     cl::desc("Details for matching functions"));
 212
 213   cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
 214                                       cl::init("-"), cl::desc("Output file"));
 215   cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
 216                             cl::aliasopt(OutputFilename));
 217   cl::opt<ProfileKinds> ProfileKind(
 218       cl::desc("Profile kind:"), cl::init(instr),
 219       cl::values(clEnumVal(instr, "Instrumentation profile (default)"),
 220                  clEnumVal(sample, "Sample profile"), clEnumValEnd));
 221
 222   cl::ParseCommandLineOptions(argc, argv, "LLVM profile data summary\n");
 223
 224   if (OutputFilename.empty())
 225     OutputFilename = "-";
 226
 227   std::error_code EC;
 228   raw_fd_ostream OS(OutputFilename.data(), EC, sys::fs::F_Text);
 229   if (EC)
 230     exitWithError(EC.message(), OutputFilename);
 231
 232   if (ShowAllFunctions && !ShowFunction.empty())
 233     errs() << "warning: -function argument ignored: showing all functions\n";
 234
 235   if (ProfileKind == instr)
 236     return showInstrProfile(Filename, ShowCounts, ShowAllFunctions,
 237                             ShowFunction, OS);
 238   else
 239     return showSampleProfile(Filename, ShowCounts, ShowAllFunctions,
 240                              ShowFunction, OS);
 241 }
 242
 243 int main(int argc, const char *argv[]) {
 244   // Print a stack trace if we signal out.
 245   sys::PrintStackTraceOnErrorSignal();
 246   PrettyStackTraceProgram X(argc, argv);
 247   llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
 248
 249   StringRef ProgName(sys::path::filename(argv[0]));
 250   if (argc > 1) {
 251     int (*func)(int, const char *[]) = nullptr;
 252
 253     if (strcmp(argv[1], "merge") == 0)
 254       func = merge_main;
 255     else if (strcmp(argv[1], "show") == 0)
 256       func = show_main;
 257
 258     if (func) {
 259       std::string Invocation(ProgName.str() + " " + argv[1]);
 260       argv[1] = Invocation.c_str();
 261       return func(argc - 1, argv + 1);
 262     }
 263
 264     if (strcmp(argv[1], "-h") == 0 ||
 265         strcmp(argv[1], "-help") == 0 ||
 266         strcmp(argv[1], "--help") == 0) {
 267
 268       errs() << "OVERVIEW: LLVM profile data tools\n\n"
 269              << "USAGE: " << ProgName << " <command> [args...]\n"
 270              << "USAGE: " << ProgName << " <command> -help\n\n"
 271              << "Available commands: merge, show\n";
 272       return 0;
 273     }
 274   }
 275
 276   if (argc < 2)
 277     errs() << ProgName << ": No command specified!\n";
 278   else
 279     errs() << ProgName << ": Unknown command!\n";
 280
 281   errs() << "USAGE: " << ProgName << " <merge|show> [args...]\n";
 282   return 1;
 283 }