unittests/ProfileData/CoverageMappingTest.cpp

   1 //===- unittest/ProfileData/CoverageMappingTest.cpp -------------------------=//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/ProfileData/Coverage/CoverageMapping.h"
  10 #include "llvm/ProfileData/Coverage/CoverageMappingReader.h"
  11 #include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
  12 #include "llvm/ProfileData/InstrProfReader.h"
  13 #include "llvm/ProfileData/InstrProfWriter.h"
  14 #include "llvm/Support/raw_ostream.h"
  15 #include "llvm/Testing/Support/Error.h"
  16 #include "llvm/Testing/Support/SupportHelpers.h"
  17 #include "gtest/gtest.h"
  18
  19 #include <ostream>
  20 #include <utility>
  21
  22 using namespace llvm;
  23 using namespace coverage;
  24
  25 LLVM_NODISCARD static ::testing::AssertionResult
  26 ErrorEquals(coveragemap_error Expected, Error E) {
  27   coveragemap_error Found;
  28   std::string FoundMsg;
  29   handleAllErrors(std::move(E), [&](const CoverageMapError &CME) {
  30     Found = CME.get();
  31     FoundMsg = CME.message();
  32   });
  33   if (Expected == Found)
  34     return ::testing::AssertionSuccess();
  35   return ::testing::AssertionFailure() << "error: " << FoundMsg << "\n";
  36 }
  37
  38 namespace llvm {
  39 namespace coverage {
  40 void PrintTo(const Counter &C, ::std::ostream *os) {
  41   if (C.isZero())
  42     *os << "Zero";
  43   else if (C.isExpression())
  44     *os << "Expression " << C.getExpressionID();
  45   else
  46     *os << "Counter " << C.getCounterID();
  47 }
  48
  49 void PrintTo(const CoverageSegment &S, ::std::ostream *os) {
  50   *os << "CoverageSegment(" << S.Line << ", " << S.Col << ", ";
  51   if (S.HasCount)
  52     *os << S.Count << ", ";
  53   *os << (S.IsRegionEntry ? "true" : "false") << ")";
  54 }
  55 }
  56 }
  57
  58 namespace {
  59
  60 struct OutputFunctionCoverageData {
  61   StringRef Name;
  62   uint64_t Hash;
  63   std::vector<StringRef> Filenames;
  64   std::vector<CounterMappingRegion> Regions;
  65
  66   OutputFunctionCoverageData() : Hash(0) {}
  67
  68   OutputFunctionCoverageData(OutputFunctionCoverageData &&OFCD)
  69       : Name(OFCD.Name), Hash(OFCD.Hash), Filenames(std::move(OFCD.Filenames)),
  70         Regions(std::move(OFCD.Regions)) {}
  71
  72   OutputFunctionCoverageData(const OutputFunctionCoverageData &) = delete;
  73   OutputFunctionCoverageData &
  74   operator=(const OutputFunctionCoverageData &) = delete;
  75   OutputFunctionCoverageData &operator=(OutputFunctionCoverageData &&) = delete;
  76
  77   void fillCoverageMappingRecord(CoverageMappingRecord &Record) const {
  78     Record.FunctionName = Name;
  79     Record.FunctionHash = Hash;
  80     Record.Filenames = Filenames;
  81     Record.Expressions = {};
  82     Record.MappingRegions = Regions;
  83   }
  84 };
  85
  86 struct CoverageMappingReaderMock : CoverageMappingReader {
  87   ArrayRef<OutputFunctionCoverageData> Functions;
  88
  89   CoverageMappingReaderMock(ArrayRef<OutputFunctionCoverageData> Functions)
  90       : Functions(Functions) {}
  91
  92   Error readNextRecord(CoverageMappingRecord &Record) override {
  93     if (Functions.empty())
  94       return make_error<CoverageMapError>(coveragemap_error::eof);
  95
  96     Functions.front().fillCoverageMappingRecord(Record);
  97     Functions = Functions.slice(1);
  98
  99     return Error::success();
 100   }
 101 };
 102
 103 struct InputFunctionCoverageData {
 104   // Maps the global file index from CoverageMappingTest.Files
 105   // to the index of that file within this function. We can't just use
 106   // global file indexes here because local indexes have to be dense.
 107   // This map is used during serialization to create the virtual file mapping
 108   // (from local fileId to global Index) in the head of the per-function
 109   // coverage mapping data.
 110   SmallDenseMap<unsigned, unsigned> ReverseVirtualFileMapping;
 111   std::string Name;
 112   uint64_t Hash;
 113   std::vector<CounterMappingRegion> Regions;
 114
 115   InputFunctionCoverageData(std::string Name, uint64_t Hash)
 116       : Name(std::move(Name)), Hash(Hash) {}
 117
 118   InputFunctionCoverageData(InputFunctionCoverageData &&IFCD)
 119       : ReverseVirtualFileMapping(std::move(IFCD.ReverseVirtualFileMapping)),
 120         Name(std::move(IFCD.Name)), Hash(IFCD.Hash),
 121         Regions(std::move(IFCD.Regions)) {}
 122
 123   InputFunctionCoverageData(const InputFunctionCoverageData &) = delete;
 124   InputFunctionCoverageData &
 125   operator=(const InputFunctionCoverageData &) = delete;
 126   InputFunctionCoverageData &operator=(InputFunctionCoverageData &&) = delete;
 127 };
 128
 129 struct CoverageMappingTest : ::testing::TestWithParam<std::pair<bool, bool>> {
 130   bool UseMultipleReaders;
 131   StringMap<unsigned> Files;
 132   std::vector<InputFunctionCoverageData> InputFunctions;
 133   std::vector<OutputFunctionCoverageData> OutputFunctions;
 134
 135   InstrProfWriter ProfileWriter;
 136   std::unique_ptr<IndexedInstrProfReader> ProfileReader;
 137
 138   std::unique_ptr<CoverageMapping> LoadedCoverage;
 139
 140   void SetUp() override {
 141     ProfileWriter.setOutputSparse(GetParam().first);
 142     UseMultipleReaders = GetParam().second;
 143   }
 144
 145   unsigned getGlobalFileIndex(StringRef Name) {
 146     auto R = Files.find(Name);
 147     if (R != Files.end())
 148       return R->second;
 149     unsigned Index = Files.size();
 150     Files.try_emplace(Name, Index);
 151     return Index;
 152   }
 153
 154   // Return the file index of file 'Name' for the current function.
 155   // Add the file into the global map if necessary.
 156   // See also InputFunctionCoverageData::ReverseVirtualFileMapping
 157   // for additional comments.
 158   unsigned getFileIndexForFunction(StringRef Name) {
 159     unsigned GlobalIndex = getGlobalFileIndex(Name);
 160     auto &CurrentFunctionFileMapping =
 161         InputFunctions.back().ReverseVirtualFileMapping;
 162     auto R = CurrentFunctionFileMapping.find(GlobalIndex);
 163     if (R != CurrentFunctionFileMapping.end())
 164       return R->second;
 165     unsigned IndexInFunction = CurrentFunctionFileMapping.size();
 166     CurrentFunctionFileMapping.insert(
 167         std::make_pair(GlobalIndex, IndexInFunction));
 168     return IndexInFunction;
 169   }
 170
 171   void startFunction(StringRef FuncName, uint64_t Hash) {
 172     InputFunctions.emplace_back(FuncName.str(), Hash);
 173   }
 174
 175   void addCMR(Counter C, StringRef File, unsigned LS, unsigned CS, unsigned LE,
 176               unsigned CE, bool Skipped = false) {
 177     auto &Regions = InputFunctions.back().Regions;
 178     unsigned FileID = getFileIndexForFunction(File);
 179     Regions.push_back(
 180         Skipped ? CounterMappingRegion::makeSkipped(FileID, LS, CS, LE, CE)
 181                 : CounterMappingRegion::makeRegion(C, FileID, LS, CS, LE, CE));
 182   }
 183
 184   void addExpansionCMR(StringRef File, StringRef ExpandedFile, unsigned LS,
 185                        unsigned CS, unsigned LE, unsigned CE) {
 186     InputFunctions.back().Regions.push_back(CounterMappingRegion::makeExpansion(
 187         getFileIndexForFunction(File), getFileIndexForFunction(ExpandedFile),
 188         LS, CS, LE, CE));
 189   }
 190
 191   std::string writeCoverageRegions(InputFunctionCoverageData &Data) {
 192     SmallVector<unsigned, 8> FileIDs(Data.ReverseVirtualFileMapping.size());
 193     for (const auto &E : Data.ReverseVirtualFileMapping)
 194       FileIDs[E.second] = E.first;
 195     std::string Coverage;
 196     llvm::raw_string_ostream OS(Coverage);
 197     CoverageMappingWriter(FileIDs, None, Data.Regions).write(OS);
 198     return OS.str();
 199   }
 200
 201   void readCoverageRegions(const std::string &Coverage,
 202                            OutputFunctionCoverageData &Data) {
 203     SmallVector<StringRef, 8> Filenames(Files.size());
 204     for (const auto &E : Files)
 205       Filenames[E.getValue()] = E.getKey();
 206     std::vector<CounterExpression> Expressions;
 207     RawCoverageMappingReader Reader(Coverage, Filenames, Data.Filenames,
 208                                     Expressions, Data.Regions);
 209     EXPECT_THAT_ERROR(Reader.read(), Succeeded());
 210   }
 211
 212   void writeAndReadCoverageRegions(bool EmitFilenames = true) {
 213     OutputFunctions.resize(InputFunctions.size());
 214     for (unsigned I = 0; I < InputFunctions.size(); ++I) {
 215       std::string Regions = writeCoverageRegions(InputFunctions[I]);
 216       readCoverageRegions(Regions, OutputFunctions[I]);
 217       OutputFunctions[I].Name = InputFunctions[I].Name;
 218       OutputFunctions[I].Hash = InputFunctions[I].Hash;
 219       if (!EmitFilenames)
 220         OutputFunctions[I].Filenames.clear();
 221     }
 222   }
 223
 224   void readProfCounts() {
 225     auto Profile = ProfileWriter.writeBuffer();
 226     auto ReaderOrErr = IndexedInstrProfReader::create(std::move(Profile));
 227     EXPECT_THAT_ERROR(ReaderOrErr.takeError(), Succeeded());
 228     ProfileReader = std::move(ReaderOrErr.get());
 229   }
 230
 231   Expected<std::unique_ptr<CoverageMapping>> readOutputFunctions() {
 232     std::vector<std::unique_ptr<CoverageMappingReader>> CoverageReaders;
 233     if (UseMultipleReaders) {
 234       for (const auto &OF : OutputFunctions) {
 235         ArrayRef<OutputFunctionCoverageData> Funcs(OF);
 236         CoverageReaders.push_back(
 237             std::make_unique<CoverageMappingReaderMock>(Funcs));
 238       }
 239     } else {
 240       ArrayRef<OutputFunctionCoverageData> Funcs(OutputFunctions);
 241       CoverageReaders.push_back(
 242           std::make_unique<CoverageMappingReaderMock>(Funcs));
 243     }
 244     return CoverageMapping::load(CoverageReaders, *ProfileReader);
 245   }
 246
 247   Error loadCoverageMapping(bool EmitFilenames = true) {
 248     readProfCounts();
 249     writeAndReadCoverageRegions(EmitFilenames);
 250     auto CoverageOrErr = readOutputFunctions();
 251     if (!CoverageOrErr)
 252       return CoverageOrErr.takeError();
 253     LoadedCoverage = std::move(CoverageOrErr.get());
 254     return Error::success();
 255   }
 256 };
 257
 258 TEST_P(CoverageMappingTest, basic_write_read) {
 259   startFunction("func", 0x1234);
 260   addCMR(Counter::getCounter(0), "foo", 1, 1, 1, 1);
 261   addCMR(Counter::getCounter(1), "foo", 2, 1, 2, 2);
 262   addCMR(Counter::getZero(),     "foo", 3, 1, 3, 4);
 263   addCMR(Counter::getCounter(2), "foo", 4, 1, 4, 8);
 264   addCMR(Counter::getCounter(3), "bar", 1, 2, 3, 4);
 265
 266   writeAndReadCoverageRegions();
 267   ASSERT_EQ(1u, InputFunctions.size());
 268   ASSERT_EQ(1u, OutputFunctions.size());
 269   InputFunctionCoverageData &Input = InputFunctions.back();
 270   OutputFunctionCoverageData &Output = OutputFunctions.back();
 271
 272   size_t N = makeArrayRef(Input.Regions).size();
 273   ASSERT_EQ(N, Output.Regions.size());
 274   for (size_t I = 0; I < N; ++I) {
 275     ASSERT_EQ(Input.Regions[I].Count, Output.Regions[I].Count);
 276     ASSERT_EQ(Input.Regions[I].FileID, Output.Regions[I].FileID);
 277     ASSERT_EQ(Input.Regions[I].startLoc(), Output.Regions[I].startLoc());
 278     ASSERT_EQ(Input.Regions[I].endLoc(), Output.Regions[I].endLoc());
 279     ASSERT_EQ(Input.Regions[I].Kind, Output.Regions[I].Kind);
 280   }
 281 }
 282
 283 TEST_P(CoverageMappingTest, correct_deserialize_for_more_than_two_files) {
 284   const char *FileNames[] = {"bar", "baz", "foo"};
 285   static const unsigned N = array_lengthof(FileNames);
 286
 287   startFunction("func", 0x1234);
 288   for (unsigned I = 0; I < N; ++I)
 289     // Use LineStart to hold the index of the file name
 290     // in order to preserve that information during possible sorting of CMRs.
 291     addCMR(Counter::getCounter(0), FileNames[I], I, 1, I, 1);
 292
 293   writeAndReadCoverageRegions();
 294   ASSERT_EQ(1u, OutputFunctions.size());
 295   OutputFunctionCoverageData &Output = OutputFunctions.back();
 296
 297   ASSERT_EQ(N, Output.Regions.size());
 298   ASSERT_EQ(N, Output.Filenames.size());
 299
 300   for (unsigned I = 0; I < N; ++I) {
 301     ASSERT_GT(N, Output.Regions[I].FileID);
 302     ASSERT_GT(N, Output.Regions[I].LineStart);
 303     EXPECT_EQ(FileNames[Output.Regions[I].LineStart],
 304               Output.Filenames[Output.Regions[I].FileID]);
 305   }
 306 }
 307
 308 static const auto Err = [](Error E) { FAIL(); };
 309
 310 TEST_P(CoverageMappingTest, load_coverage_for_more_than_two_files) {
 311   ProfileWriter.addRecord({"func", 0x1234, {0}}, Err);
 312
 313   const char *FileNames[] = {"bar", "baz", "foo"};
 314   static const unsigned N = array_lengthof(FileNames);
 315
 316   startFunction("func", 0x1234);
 317   for (unsigned I = 0; I < N; ++I)
 318     // Use LineStart to hold the index of the file name
 319     // in order to preserve that information during possible sorting of CMRs.
 320     addCMR(Counter::getCounter(0), FileNames[I], I, 1, I, 1);
 321
 322   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 323
 324   for (unsigned I = 0; I < N; ++I) {
 325     CoverageData Data = LoadedCoverage->getCoverageForFile(FileNames[I]);
 326     ASSERT_TRUE(!Data.empty());
 327     EXPECT_EQ(I, Data.begin()->Line);
 328   }
 329 }
 330
 331 TEST_P(CoverageMappingTest, load_coverage_with_bogus_function_name) {
 332   ProfileWriter.addRecord({"", 0x1234, {10}}, Err);
 333   startFunction("", 0x1234);
 334   addCMR(Counter::getCounter(0), "foo", 1, 1, 5, 5);
 335   EXPECT_TRUE(ErrorEquals(coveragemap_error::malformed, loadCoverageMapping()));
 336 }
 337
 338 TEST_P(CoverageMappingTest, load_coverage_for_several_functions) {
 339   ProfileWriter.addRecord({"func1", 0x1234, {10}}, Err);
 340   ProfileWriter.addRecord({"func2", 0x2345, {20}}, Err);
 341
 342   startFunction("func1", 0x1234);
 343   addCMR(Counter::getCounter(0), "foo", 1, 1, 5, 5);
 344
 345   startFunction("func2", 0x2345);
 346   addCMR(Counter::getCounter(0), "bar", 2, 2, 6, 6);
 347
 348   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 349
 350   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 351   EXPECT_EQ(2, std::distance(FunctionRecords.begin(), FunctionRecords.end()));
 352   for (const auto &FunctionRecord : FunctionRecords) {
 353     CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 354     std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 355     ASSERT_EQ(2U, Segments.size());
 356     if (FunctionRecord.Name == "func1") {
 357       EXPECT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
 358       EXPECT_EQ(CoverageSegment(5, 5, false), Segments[1]);
 359     } else {
 360       ASSERT_EQ("func2", FunctionRecord.Name);
 361       EXPECT_EQ(CoverageSegment(2, 2, 20, true), Segments[0]);
 362       EXPECT_EQ(CoverageSegment(6, 6, false), Segments[1]);
 363     }
 364   }
 365 }
 366
 367 TEST_P(CoverageMappingTest, create_combined_regions) {
 368   ProfileWriter.addRecord({"func1", 0x1234, {1, 2, 3}}, Err);
 369   startFunction("func1", 0x1234);
 370
 371   // Given regions which start at the same location, emit a segment for the
 372   // last region.
 373   addCMR(Counter::getCounter(0), "file1", 1, 1, 2, 2);
 374   addCMR(Counter::getCounter(1), "file1", 1, 1, 2, 2);
 375   addCMR(Counter::getCounter(2), "file1", 1, 1, 2, 2);
 376
 377   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 378   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 379   const auto &FunctionRecord = *FunctionRecords.begin();
 380   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 381   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 382
 383   ASSERT_EQ(2U, Segments.size());
 384   EXPECT_EQ(CoverageSegment(1, 1, 6, true), Segments[0]);
 385   EXPECT_EQ(CoverageSegment(2, 2, false), Segments[1]);
 386 }
 387
 388 TEST_P(CoverageMappingTest, skipped_segments_have_no_count) {
 389   ProfileWriter.addRecord({"func1", 0x1234, {1}}, Err);
 390   startFunction("func1", 0x1234);
 391
 392   addCMR(Counter::getCounter(0), "file1", 1, 1, 5, 5);
 393   addCMR(Counter::getCounter(0), "file1", 5, 1, 5, 5, /*Skipped=*/true);
 394
 395   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 396   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 397   const auto &FunctionRecord = *FunctionRecords.begin();
 398   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 399   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 400
 401   ASSERT_EQ(3U, Segments.size());
 402   EXPECT_EQ(CoverageSegment(1, 1, 1, true), Segments[0]);
 403   EXPECT_EQ(CoverageSegment(5, 1, true), Segments[1]);
 404   EXPECT_EQ(CoverageSegment(5, 5, false), Segments[2]);
 405 }
 406
 407 TEST_P(CoverageMappingTest, multiple_regions_end_after_parent_ends) {
 408   ProfileWriter.addRecord({"func1", 0x1234, {1, 0}}, Err);
 409   startFunction("func1", 0x1234);
 410
 411   // 1| F{ a{
 412   // 2|
 413   // 3|    a} b{ c{
 414   // 4|
 415   // 5|    b}
 416   // 6|
 417   // 7| c} d{   e{
 418   // 8|
 419   // 9| d}      e} F}
 420   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9); // < F
 421   addCMR(Counter::getCounter(0), "file1", 1, 1, 3, 5); // < a
 422   addCMR(Counter::getCounter(0), "file1", 3, 5, 5, 4); // < b
 423   addCMR(Counter::getCounter(1), "file1", 3, 5, 7, 3); // < c
 424   addCMR(Counter::getCounter(1), "file1", 7, 3, 9, 2); // < d
 425   addCMR(Counter::getCounter(1), "file1", 7, 7, 9, 7); // < e
 426
 427   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 428   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 429   const auto &FunctionRecord = *FunctionRecords.begin();
 430   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 431   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 432
 433   // Old output (not sorted or unique):
 434   //   Segment at 1:1 with count 1
 435   //   Segment at 1:1 with count 1
 436   //   Segment at 3:5 with count 1
 437   //   Segment at 3:5 with count 0
 438   //   Segment at 3:5 with count 1
 439   //   Segment at 5:4 with count 0
 440   //   Segment at 7:3 with count 1
 441   //   Segment at 7:3 with count 0
 442   //   Segment at 7:7 with count 0
 443   //   Segment at 9:7 with count 0
 444   //   Segment at 9:2 with count 1
 445   //   Top level segment at 9:9
 446
 447   // New output (sorted and unique):
 448   //   Segment at 1:1 (count = 1), RegionEntry
 449   //   Segment at 3:5 (count = 1), RegionEntry
 450   //   Segment at 5:4 (count = 0)
 451   //   Segment at 7:3 (count = 0), RegionEntry
 452   //   Segment at 7:7 (count = 0), RegionEntry
 453   //   Segment at 9:2 (count = 0)
 454   //   Segment at 9:7 (count = 1)
 455   //   Segment at 9:9 (count = 0), Skipped
 456
 457   ASSERT_EQ(8U, Segments.size());
 458   EXPECT_EQ(CoverageSegment(1, 1, 1, true), Segments[0]);
 459   EXPECT_EQ(CoverageSegment(3, 5, 1, true), Segments[1]);
 460   EXPECT_EQ(CoverageSegment(5, 4, 0, false), Segments[2]);
 461   EXPECT_EQ(CoverageSegment(7, 3, 0, true), Segments[3]);
 462   EXPECT_EQ(CoverageSegment(7, 7, 0, true), Segments[4]);
 463   EXPECT_EQ(CoverageSegment(9, 2, 0, false), Segments[5]);
 464   EXPECT_EQ(CoverageSegment(9, 7, 1, false), Segments[6]);
 465   EXPECT_EQ(CoverageSegment(9, 9, false), Segments[7]);
 466 }
 467
 468 TEST_P(CoverageMappingTest, multiple_completed_segments_at_same_loc) {
 469   ProfileWriter.addRecord({"func1", 0x1234, {0, 1, 2}}, Err);
 470   startFunction("func1", 0x1234);
 471
 472   // PR35495
 473   addCMR(Counter::getCounter(1), "file1", 2, 1, 18, 2);
 474   addCMR(Counter::getCounter(0), "file1", 8, 10, 14, 6);
 475   addCMR(Counter::getCounter(0), "file1", 8, 12, 14, 6);
 476   addCMR(Counter::getCounter(1), "file1", 9, 1, 14, 6);
 477   addCMR(Counter::getCounter(2), "file1", 11, 13, 11, 14);
 478
 479   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 480   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 481   const auto &FunctionRecord = *FunctionRecords.begin();
 482   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 483   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 484
 485   ASSERT_EQ(7U, Segments.size());
 486   EXPECT_EQ(CoverageSegment(2, 1, 1, true), Segments[0]);
 487   EXPECT_EQ(CoverageSegment(8, 10, 0, true), Segments[1]);
 488   EXPECT_EQ(CoverageSegment(8, 12, 0, true), Segments[2]);
 489   EXPECT_EQ(CoverageSegment(9, 1, 1, true), Segments[3]);
 490   EXPECT_EQ(CoverageSegment(11, 13, 2, true), Segments[4]);
 491   // Use count=1 (from 9:1 -> 14:6), not count=0 (from 8:12 -> 14:6).
 492   EXPECT_EQ(CoverageSegment(11, 14, 1, false), Segments[5]);
 493   EXPECT_EQ(CoverageSegment(18, 2, false), Segments[6]);
 494 }
 495
 496 TEST_P(CoverageMappingTest, dont_emit_redundant_segments) {
 497   ProfileWriter.addRecord({"func1", 0x1234, {1, 1}}, Err);
 498   startFunction("func1", 0x1234);
 499
 500   addCMR(Counter::getCounter(0), "file1", 1, 1, 4, 4);
 501   addCMR(Counter::getCounter(1), "file1", 2, 2, 5, 5);
 502   addCMR(Counter::getCounter(0), "file1", 3, 3, 6, 6);
 503
 504   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 505   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 506   const auto &FunctionRecord = *FunctionRecords.begin();
 507   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 508   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 509
 510   ASSERT_EQ(5U, Segments.size());
 511   EXPECT_EQ(CoverageSegment(1, 1, 1, true), Segments[0]);
 512   EXPECT_EQ(CoverageSegment(2, 2, 1, true), Segments[1]);
 513   EXPECT_EQ(CoverageSegment(3, 3, 1, true), Segments[2]);
 514   EXPECT_EQ(CoverageSegment(4, 4, 1, false), Segments[3]);
 515   // A closing segment starting at 5:5 would be redundant: it would have the
 516   // same count as the segment starting at 4:4, and has all the same metadata.
 517   EXPECT_EQ(CoverageSegment(6, 6, false), Segments[4]);
 518 }
 519
 520 TEST_P(CoverageMappingTest, dont_emit_closing_segment_at_new_region_start) {
 521   ProfileWriter.addRecord({"func1", 0x1234, {1}}, Err);
 522   startFunction("func1", 0x1234);
 523
 524   addCMR(Counter::getCounter(0), "file1", 1, 1, 6, 5);
 525   addCMR(Counter::getCounter(0), "file1", 2, 2, 6, 5);
 526   addCMR(Counter::getCounter(0), "file1", 3, 3, 6, 5);
 527   addCMR(Counter::getCounter(0), "file1", 6, 5, 7, 7);
 528
 529   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 530   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 531   const auto &FunctionRecord = *FunctionRecords.begin();
 532   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 533   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 534
 535   ASSERT_EQ(5U, Segments.size());
 536   EXPECT_EQ(CoverageSegment(1, 1, 1, true), Segments[0]);
 537   EXPECT_EQ(CoverageSegment(2, 2, 1, true), Segments[1]);
 538   EXPECT_EQ(CoverageSegment(3, 3, 1, true), Segments[2]);
 539   EXPECT_EQ(CoverageSegment(6, 5, 1, true), Segments[3]);
 540   // The old segment builder would get this wrong by emitting multiple segments
 541   // which start at 6:5 (a few of which were skipped segments). We should just
 542   // get a segment for the region entry.
 543   EXPECT_EQ(CoverageSegment(7, 7, false), Segments[4]);
 544 }
 545
 546 TEST_P(CoverageMappingTest, handle_consecutive_regions_with_zero_length) {
 547   ProfileWriter.addRecord({"func1", 0x1234, {1, 2}}, Err);
 548   startFunction("func1", 0x1234);
 549
 550   addCMR(Counter::getCounter(0), "file1", 1, 1, 1, 1);
 551   addCMR(Counter::getCounter(1), "file1", 1, 1, 1, 1);
 552   addCMR(Counter::getCounter(0), "file1", 1, 1, 1, 1);
 553   addCMR(Counter::getCounter(1), "file1", 1, 1, 1, 1);
 554   addCMR(Counter::getCounter(0), "file1", 1, 1, 1, 1);
 555
 556   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 557   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 558   const auto &FunctionRecord = *FunctionRecords.begin();
 559   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 560   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 561
 562   ASSERT_EQ(1U, Segments.size());
 563   EXPECT_EQ(CoverageSegment(1, 1, true), Segments[0]);
 564   // We need to get a skipped segment starting at 1:1. In this case there is
 565   // also a region entry at 1:1.
 566 }
 567
 568 TEST_P(CoverageMappingTest, handle_sandwiched_zero_length_region) {
 569   ProfileWriter.addRecord({"func1", 0x1234, {2, 1}}, Err);
 570   startFunction("func1", 0x1234);
 571
 572   addCMR(Counter::getCounter(0), "file1", 1, 5, 4, 4);
 573   addCMR(Counter::getCounter(1), "file1", 1, 9, 1, 50);
 574   addCMR(Counter::getCounter(1), "file1", 2, 7, 2, 34);
 575   addCMR(Counter::getCounter(1), "file1", 3, 5, 3, 21);
 576   addCMR(Counter::getCounter(1), "file1", 3, 21, 3, 21);
 577   addCMR(Counter::getCounter(1), "file1", 4, 12, 4, 17);
 578
 579   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 580   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 581   const auto &FunctionRecord = *FunctionRecords.begin();
 582   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 583   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 584
 585   ASSERT_EQ(10U, Segments.size());
 586   EXPECT_EQ(CoverageSegment(1, 5, 2, true), Segments[0]);
 587   EXPECT_EQ(CoverageSegment(1, 9, 1, true), Segments[1]);
 588   EXPECT_EQ(CoverageSegment(1, 50, 2, false), Segments[2]);
 589   EXPECT_EQ(CoverageSegment(2, 7, 1, true), Segments[3]);
 590   EXPECT_EQ(CoverageSegment(2, 34, 2, false), Segments[4]);
 591   EXPECT_EQ(CoverageSegment(3, 5, 1, true), Segments[5]);
 592   EXPECT_EQ(CoverageSegment(3, 21, 2, true), Segments[6]);
 593   // Handle the zero-length region by creating a segment with its predecessor's
 594   // count (i.e the count from 1:5 -> 4:4).
 595   EXPECT_EQ(CoverageSegment(4, 4, false), Segments[7]);
 596   // The area between 4:4 and 4:12 is skipped.
 597   EXPECT_EQ(CoverageSegment(4, 12, 1, true), Segments[8]);
 598   EXPECT_EQ(CoverageSegment(4, 17, false), Segments[9]);
 599 }
 600
 601 TEST_P(CoverageMappingTest, handle_last_completed_region) {
 602   ProfileWriter.addRecord({"func1", 0x1234, {1, 2, 3, 4}}, Err);
 603   startFunction("func1", 0x1234);
 604
 605   addCMR(Counter::getCounter(0), "file1", 1, 1, 8, 8);
 606   addCMR(Counter::getCounter(1), "file1", 2, 2, 5, 5);
 607   addCMR(Counter::getCounter(2), "file1", 3, 3, 4, 4);
 608   addCMR(Counter::getCounter(3), "file1", 6, 6, 7, 7);
 609
 610   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 611   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
 612   const auto &FunctionRecord = *FunctionRecords.begin();
 613   CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
 614   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 615
 616   ASSERT_EQ(8U, Segments.size());
 617   EXPECT_EQ(CoverageSegment(1, 1, 1, true), Segments[0]);
 618   EXPECT_EQ(CoverageSegment(2, 2, 2, true), Segments[1]);
 619   EXPECT_EQ(CoverageSegment(3, 3, 3, true), Segments[2]);
 620   EXPECT_EQ(CoverageSegment(4, 4, 2, false), Segments[3]);
 621   EXPECT_EQ(CoverageSegment(5, 5, 1, false), Segments[4]);
 622   EXPECT_EQ(CoverageSegment(6, 6, 4, true), Segments[5]);
 623   EXPECT_EQ(CoverageSegment(7, 7, 1, false), Segments[6]);
 624   EXPECT_EQ(CoverageSegment(8, 8, false), Segments[7]);
 625 }
 626
 627 TEST_P(CoverageMappingTest, expansion_gets_first_counter) {
 628   startFunction("func", 0x1234);
 629   addCMR(Counter::getCounter(1), "foo", 10, 1, 10, 2);
 630   // This starts earlier in "foo", so the expansion should get its counter.
 631   addCMR(Counter::getCounter(2), "foo", 1, 1, 20, 1);
 632   addExpansionCMR("bar", "foo", 3, 3, 3, 3);
 633
 634   writeAndReadCoverageRegions();
 635   ASSERT_EQ(1u, OutputFunctions.size());
 636   OutputFunctionCoverageData &Output = OutputFunctions.back();
 637
 638   ASSERT_EQ(CounterMappingRegion::ExpansionRegion, Output.Regions[2].Kind);
 639   ASSERT_EQ(Counter::getCounter(2), Output.Regions[2].Count);
 640   ASSERT_EQ(3U, Output.Regions[2].LineStart);
 641 }
 642
 643 TEST_P(CoverageMappingTest, basic_coverage_iteration) {
 644   ProfileWriter.addRecord({"func", 0x1234, {30, 20, 10, 0}}, Err);
 645
 646   startFunction("func", 0x1234);
 647   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 648   addCMR(Counter::getCounter(1), "file1", 1, 1, 4, 7);
 649   addCMR(Counter::getCounter(2), "file1", 5, 8, 9, 1);
 650   addCMR(Counter::getCounter(3), "file1", 10, 10, 11, 11);
 651   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 652
 653   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
 654   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 655   ASSERT_EQ(7U, Segments.size());
 656   ASSERT_EQ(CoverageSegment(1, 1, 20, true),  Segments[0]);
 657   ASSERT_EQ(CoverageSegment(4, 7, 30, false), Segments[1]);
 658   ASSERT_EQ(CoverageSegment(5, 8, 10, true),  Segments[2]);
 659   ASSERT_EQ(CoverageSegment(9, 1, 30, false), Segments[3]);
 660   ASSERT_EQ(CoverageSegment(9, 9, false),     Segments[4]);
 661   ASSERT_EQ(CoverageSegment(10, 10, 0, true), Segments[5]);
 662   ASSERT_EQ(CoverageSegment(11, 11, false),   Segments[6]);
 663 }
 664
 665 TEST_P(CoverageMappingTest, test_line_coverage_iterator) {
 666   ProfileWriter.addRecord({"func", 0x1234, {30, 20, 10, 0}}, Err);
 667
 668   startFunction("func", 0x1234);
 669   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 670   addCMR(Counter::getCounter(1), "file1", 1, 1, 4, 7);
 671   addCMR(Counter::getCounter(2), "file1", 5, 8, 9, 1);
 672   addCMR(Counter::getCounter(3), "file1", 10, 10, 11, 11);
 673   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 674
 675   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
 676
 677   unsigned Line = 0;
 678   unsigned LineCounts[] = {20, 20, 20, 20, 30, 10, 10, 10, 10, 0, 0};
 679   for (const auto &LCS : getLineCoverageStats(Data)) {
 680     ASSERT_EQ(Line + 1, LCS.getLine());
 681     errs() << "Line: " << Line + 1 << ", count = " << LCS.getExecutionCount() << "\n";
 682     ASSERT_EQ(LineCounts[Line], LCS.getExecutionCount());
 683     ++Line;
 684   }
 685   ASSERT_EQ(11U, Line);
 686 }
 687
 688 TEST_P(CoverageMappingTest, uncovered_function) {
 689   startFunction("func", 0x1234);
 690   addCMR(Counter::getZero(), "file1", 1, 2, 3, 4);
 691   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 692
 693   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
 694   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 695   ASSERT_EQ(2U, Segments.size());
 696   ASSERT_EQ(CoverageSegment(1, 2, 0, true), Segments[0]);
 697   ASSERT_EQ(CoverageSegment(3, 4, false),   Segments[1]);
 698 }
 699
 700 TEST_P(CoverageMappingTest, uncovered_function_with_mapping) {
 701   startFunction("func", 0x1234);
 702   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 703   addCMR(Counter::getCounter(1), "file1", 1, 1, 4, 7);
 704   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 705
 706   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
 707   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 708   ASSERT_EQ(3U, Segments.size());
 709   ASSERT_EQ(CoverageSegment(1, 1, 0, true),  Segments[0]);
 710   ASSERT_EQ(CoverageSegment(4, 7, 0, false), Segments[1]);
 711   ASSERT_EQ(CoverageSegment(9, 9, false),    Segments[2]);
 712 }
 713
 714 TEST_P(CoverageMappingTest, combine_regions) {
 715   ProfileWriter.addRecord({"func", 0x1234, {10, 20, 30}}, Err);
 716
 717   startFunction("func", 0x1234);
 718   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 719   addCMR(Counter::getCounter(1), "file1", 3, 3, 4, 4);
 720   addCMR(Counter::getCounter(2), "file1", 3, 3, 4, 4);
 721   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 722
 723   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
 724   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 725   ASSERT_EQ(4U, Segments.size());
 726   ASSERT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
 727   ASSERT_EQ(CoverageSegment(3, 3, 50, true), Segments[1]);
 728   ASSERT_EQ(CoverageSegment(4, 4, 10, false), Segments[2]);
 729   ASSERT_EQ(CoverageSegment(9, 9, false), Segments[3]);
 730 }
 731
 732 TEST_P(CoverageMappingTest, restore_combined_counter_after_nested_region) {
 733   ProfileWriter.addRecord({"func", 0x1234, {10, 20, 40}}, Err);
 734
 735   startFunction("func", 0x1234);
 736   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 737   addCMR(Counter::getCounter(1), "file1", 1, 1, 9, 9);
 738   addCMR(Counter::getCounter(2), "file1", 3, 3, 5, 5);
 739   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 740
 741   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
 742   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 743   ASSERT_EQ(4U, Segments.size());
 744   EXPECT_EQ(CoverageSegment(1, 1, 30, true), Segments[0]);
 745   EXPECT_EQ(CoverageSegment(3, 3, 40, true), Segments[1]);
 746   EXPECT_EQ(CoverageSegment(5, 5, 30, false), Segments[2]);
 747   EXPECT_EQ(CoverageSegment(9, 9, false), Segments[3]);
 748 }
 749
 750 // If CodeRegions and ExpansionRegions cover the same area,
 751 // only counts of CodeRegions should be used.
 752 TEST_P(CoverageMappingTest, dont_combine_expansions) {
 753   ProfileWriter.addRecord({"func", 0x1234, {10, 20}}, Err);
 754   ProfileWriter.addRecord({"func", 0x1234, {0, 0}}, Err);
 755
 756   startFunction("func", 0x1234);
 757   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 758   addCMR(Counter::getCounter(1), "file1", 3, 3, 4, 4);
 759   addCMR(Counter::getCounter(1), "include1", 6, 6, 7, 7);
 760   addExpansionCMR("file1", "include1", 3, 3, 4, 4);
 761   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 762
 763   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
 764   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 765   ASSERT_EQ(4U, Segments.size());
 766   ASSERT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
 767   ASSERT_EQ(CoverageSegment(3, 3, 20, true), Segments[1]);
 768   ASSERT_EQ(CoverageSegment(4, 4, 10, false), Segments[2]);
 769   ASSERT_EQ(CoverageSegment(9, 9, false), Segments[3]);
 770 }
 771
 772 // If an area is covered only by ExpansionRegions, they should be combinated.
 773 TEST_P(CoverageMappingTest, combine_expansions) {
 774   ProfileWriter.addRecord({"func", 0x1234, {2, 3, 7}}, Err);
 775
 776   startFunction("func", 0x1234);
 777   addCMR(Counter::getCounter(1), "include1", 1, 1, 1, 10);
 778   addCMR(Counter::getCounter(2), "include2", 1, 1, 1, 10);
 779   addCMR(Counter::getCounter(0), "file", 1, 1, 5, 5);
 780   addExpansionCMR("file", "include1", 3, 1, 3, 5);
 781   addExpansionCMR("file", "include2", 3, 1, 3, 5);
 782
 783   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 784
 785   CoverageData Data = LoadedCoverage->getCoverageForFile("file");
 786   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 787   ASSERT_EQ(4U, Segments.size());
 788   EXPECT_EQ(CoverageSegment(1, 1, 2, true), Segments[0]);
 789   EXPECT_EQ(CoverageSegment(3, 1, 10, true), Segments[1]);
 790   EXPECT_EQ(CoverageSegment(3, 5, 2, false), Segments[2]);
 791   EXPECT_EQ(CoverageSegment(5, 5, false), Segments[3]);
 792 }
 793
 794 TEST_P(CoverageMappingTest, strip_filename_prefix) {
 795   ProfileWriter.addRecord({"file1:func", 0x1234, {0}}, Err);
 796
 797   startFunction("file1:func", 0x1234);
 798   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 799   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 800
 801   std::vector<std::string> Names;
 802   for (const auto &Func : LoadedCoverage->getCoveredFunctions())
 803     Names.push_back(Func.Name);
 804   ASSERT_EQ(1U, Names.size());
 805   ASSERT_EQ("func", Names[0]);
 806 }
 807
 808 TEST_P(CoverageMappingTest, strip_unknown_filename_prefix) {
 809   ProfileWriter.addRecord({"<unknown>:func", 0x1234, {0}}, Err);
 810
 811   startFunction("<unknown>:func", 0x1234);
 812   addCMR(Counter::getCounter(0), "", 1, 1, 9, 9);
 813   EXPECT_THAT_ERROR(loadCoverageMapping(/*EmitFilenames=*/false), Succeeded());
 814
 815   std::vector<std::string> Names;
 816   for (const auto &Func : LoadedCoverage->getCoveredFunctions())
 817     Names.push_back(Func.Name);
 818   ASSERT_EQ(1U, Names.size());
 819   ASSERT_EQ("func", Names[0]);
 820 }
 821
 822 TEST_P(CoverageMappingTest, dont_detect_false_instantiations) {
 823   ProfileWriter.addRecord({"foo", 0x1234, {10}}, Err);
 824   ProfileWriter.addRecord({"bar", 0x2345, {20}}, Err);
 825
 826   startFunction("foo", 0x1234);
 827   addCMR(Counter::getCounter(0), "expanded", 1, 1, 1, 10);
 828   addExpansionCMR("main", "expanded", 4, 1, 4, 5);
 829
 830   startFunction("bar", 0x2345);
 831   addCMR(Counter::getCounter(0), "expanded", 1, 1, 1, 10);
 832   addExpansionCMR("main", "expanded", 9, 1, 9, 5);
 833
 834   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 835
 836   std::vector<InstantiationGroup> InstantiationGroups =
 837       LoadedCoverage->getInstantiationGroups("expanded");
 838   for (const auto &Group : InstantiationGroups)
 839     ASSERT_EQ(Group.size(), 1U);
 840 }
 841
 842 TEST_P(CoverageMappingTest, load_coverage_for_expanded_file) {
 843   ProfileWriter.addRecord({"func", 0x1234, {10}}, Err);
 844
 845   startFunction("func", 0x1234);
 846   addCMR(Counter::getCounter(0), "expanded", 1, 1, 1, 10);
 847   addExpansionCMR("main", "expanded", 4, 1, 4, 5);
 848
 849   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 850
 851   CoverageData Data = LoadedCoverage->getCoverageForFile("expanded");
 852   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
 853   ASSERT_EQ(2U, Segments.size());
 854   EXPECT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
 855   EXPECT_EQ(CoverageSegment(1, 10, false), Segments[1]);
 856 }
 857
 858 TEST_P(CoverageMappingTest, skip_duplicate_function_record) {
 859   ProfileWriter.addRecord({"func", 0x1234, {1}}, Err);
 860
 861   // This record should be loaded.
 862   startFunction("func", 0x1234);
 863   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 864
 865   // This record should be loaded.
 866   startFunction("func", 0x1234);
 867   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 868   addCMR(Counter::getCounter(0), "file2", 1, 1, 9, 9);
 869
 870   // This record should be skipped.
 871   startFunction("func", 0x1234);
 872   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 873
 874   // This record should be loaded.
 875   startFunction("func", 0x1234);
 876   addCMR(Counter::getCounter(0), "file2", 1, 1, 9, 9);
 877   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 878
 879   // This record should be skipped.
 880   startFunction("func", 0x1234);
 881   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
 882   addCMR(Counter::getCounter(0), "file2", 1, 1, 9, 9);
 883
 884   EXPECT_THAT_ERROR(loadCoverageMapping(), Succeeded());
 885
 886   auto Funcs = LoadedCoverage->getCoveredFunctions();
 887   unsigned NumFuncs = std::distance(Funcs.begin(), Funcs.end());
 888   ASSERT_EQ(3U, NumFuncs);
 889 }
 890
 891 // FIXME: Use ::testing::Combine() when llvm updates its copy of googletest.
 892 INSTANTIATE_TEST_CASE_P(ParameterizedCovMapTest, CoverageMappingTest,
 893                         ::testing::Values(std::pair<bool, bool>({false, false}),
 894                                           std::pair<bool, bool>({false, true}),
 895                                           std::pair<bool, bool>({true, false}),
 896                                           std::pair<bool, bool>({true, true})),);
 897
 898 } // end anonymous namespace