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      1 //===- unittest/ProfileData/CoverageMappingTest.cpp -------------------------=//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #include "llvm/ProfileData/Coverage/CoverageMapping.h"
     11 #include "llvm/ProfileData/Coverage/CoverageMappingReader.h"
     12 #include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
     13 #include "llvm/ProfileData/InstrProfReader.h"
     14 #include "llvm/ProfileData/InstrProfWriter.h"
     15 #include "llvm/Support/raw_ostream.h"
     16 #include "gtest/gtest.h"
     17 
     18 #include <ostream>
     19 
     20 using namespace llvm;
     21 using namespace coverage;
     22 
     23 static ::testing::AssertionResult NoError(Error E) {
     24   if (!E)
     25     return ::testing::AssertionSuccess();
     26   return ::testing::AssertionFailure() << "error: " << toString(std::move(E))
     27                                        << "\n";
     28 }
     29 
     30 namespace llvm {
     31 namespace coverage {
     32 void PrintTo(const Counter &C, ::std::ostream *os) {
     33   if (C.isZero())
     34     *os << "Zero";
     35   else if (C.isExpression())
     36     *os << "Expression " << C.getExpressionID();
     37   else
     38     *os << "Counter " << C.getCounterID();
     39 }
     40 
     41 void PrintTo(const CoverageSegment &S, ::std::ostream *os) {
     42   *os << "CoverageSegment(" << S.Line << ", " << S.Col << ", ";
     43   if (S.HasCount)
     44     *os << S.Count << ", ";
     45   *os << (S.IsRegionEntry ? "true" : "false") << ")";
     46 }
     47 }
     48 }
     49 
     50 namespace {
     51 
     52 struct OutputFunctionCoverageData {
     53   StringRef Name;
     54   uint64_t Hash;
     55   std::vector<StringRef> Filenames;
     56   std::vector<CounterMappingRegion> Regions;
     57 
     58   void fillCoverageMappingRecord(CoverageMappingRecord &Record) const {
     59     Record.FunctionName = Name;
     60     Record.FunctionHash = Hash;
     61     Record.Filenames = Filenames;
     62     Record.Expressions = {};
     63     Record.MappingRegions = Regions;
     64   }
     65 };
     66 
     67 struct CoverageMappingReaderMock : CoverageMappingReader {
     68   ArrayRef<OutputFunctionCoverageData> Functions;
     69 
     70   CoverageMappingReaderMock(ArrayRef<OutputFunctionCoverageData> Functions)
     71       : Functions(Functions) {}
     72 
     73   Error readNextRecord(CoverageMappingRecord &Record) override {
     74     if (Functions.empty())
     75       return make_error<CoverageMapError>(coveragemap_error::eof);
     76 
     77     Functions.front().fillCoverageMappingRecord(Record);
     78     Functions = Functions.slice(1);
     79 
     80     return Error::success();
     81   }
     82 };
     83 
     84 struct InputFunctionCoverageData {
     85   // Maps the global file index from CoverageMappingTest.Files
     86   // to the index of that file within this function. We can't just use
     87   // global file indexes here because local indexes have to be dense.
     88   // This map is used during serialization to create the virtual file mapping
     89   // (from local fileId to global Index) in the head of the per-function
     90   // coverage mapping data.
     91   SmallDenseMap<unsigned, unsigned> ReverseVirtualFileMapping;
     92   std::string Name;
     93   uint64_t Hash;
     94   std::vector<CounterMappingRegion> Regions;
     95 
     96   InputFunctionCoverageData(std::string Name, uint64_t Hash)
     97       : Name(std::move(Name)), Hash(Hash) {}
     98 };
     99 
    100 struct CoverageMappingTest : ::testing::Test {
    101   StringMap<unsigned> Files;
    102   std::vector<InputFunctionCoverageData> InputFunctions;
    103   std::vector<OutputFunctionCoverageData> OutputFunctions;
    104 
    105   InstrProfWriter ProfileWriter;
    106   std::unique_ptr<IndexedInstrProfReader> ProfileReader;
    107 
    108   std::unique_ptr<CoverageMapping> LoadedCoverage;
    109 
    110   void SetUp() override {
    111     ProfileWriter.setOutputSparse(false);
    112   }
    113 
    114   unsigned getGlobalFileIndex(StringRef Name) {
    115     auto R = Files.find(Name);
    116     if (R != Files.end())
    117       return R->second;
    118     unsigned Index = Files.size();
    119     Files.emplace_second(Name, Index);
    120     return Index;
    121   }
    122 
    123   // Return the file index of file 'Name' for the current function.
    124   // Add the file into the global map if necesary.
    125   // See also InputFunctionCoverageData::ReverseVirtualFileMapping
    126   // for additional comments.
    127   unsigned getFileIndexForFunction(StringRef Name) {
    128     unsigned GlobalIndex = getGlobalFileIndex(Name);
    129     auto &CurrentFunctionFileMapping =
    130         InputFunctions.back().ReverseVirtualFileMapping;
    131     auto R = CurrentFunctionFileMapping.find(GlobalIndex);
    132     if (R != CurrentFunctionFileMapping.end())
    133       return R->second;
    134     unsigned IndexInFunction = CurrentFunctionFileMapping.size();
    135     CurrentFunctionFileMapping.insert(
    136         std::make_pair(GlobalIndex, IndexInFunction));
    137     return IndexInFunction;
    138   }
    139 
    140   void startFunction(StringRef FuncName, uint64_t Hash) {
    141     InputFunctions.emplace_back(FuncName.str(), Hash);
    142   }
    143 
    144   void addCMR(Counter C, StringRef File, unsigned LS, unsigned CS, unsigned LE,
    145               unsigned CE) {
    146     InputFunctions.back().Regions.push_back(CounterMappingRegion::makeRegion(
    147         C, getFileIndexForFunction(File), LS, CS, LE, CE));
    148   }
    149 
    150   void addExpansionCMR(StringRef File, StringRef ExpandedFile, unsigned LS,
    151                        unsigned CS, unsigned LE, unsigned CE) {
    152     InputFunctions.back().Regions.push_back(CounterMappingRegion::makeExpansion(
    153         getFileIndexForFunction(File), getFileIndexForFunction(ExpandedFile),
    154         LS, CS, LE, CE));
    155   }
    156 
    157   std::string writeCoverageRegions(InputFunctionCoverageData &Data) {
    158     SmallVector<unsigned, 8> FileIDs(Data.ReverseVirtualFileMapping.size());
    159     for (const auto &E : Data.ReverseVirtualFileMapping)
    160       FileIDs[E.second] = E.first;
    161     std::string Coverage;
    162     llvm::raw_string_ostream OS(Coverage);
    163     CoverageMappingWriter(FileIDs, None, Data.Regions).write(OS);
    164     return OS.str();
    165   }
    166 
    167   void readCoverageRegions(std::string Coverage,
    168                            OutputFunctionCoverageData &Data) {
    169     SmallVector<StringRef, 8> Filenames(Files.size());
    170     for (const auto &E : Files)
    171       Filenames[E.getValue()] = E.getKey();
    172     std::vector<CounterExpression> Expressions;
    173     RawCoverageMappingReader Reader(Coverage, Filenames, Data.Filenames,
    174                                     Expressions, Data.Regions);
    175     ASSERT_TRUE(NoError(Reader.read()));
    176   }
    177 
    178   void writeAndReadCoverageRegions(bool EmitFilenames = true) {
    179     OutputFunctions.resize(InputFunctions.size());
    180     for (unsigned I = 0; I < InputFunctions.size(); ++I) {
    181       std::string Regions = writeCoverageRegions(InputFunctions[I]);
    182       readCoverageRegions(Regions, OutputFunctions[I]);
    183       OutputFunctions[I].Name = InputFunctions[I].Name;
    184       OutputFunctions[I].Hash = InputFunctions[I].Hash;
    185       if (!EmitFilenames)
    186         OutputFunctions[I].Filenames.clear();
    187     }
    188   }
    189 
    190   void readProfCounts() {
    191     auto Profile = ProfileWriter.writeBuffer();
    192     auto ReaderOrErr = IndexedInstrProfReader::create(std::move(Profile));
    193     ASSERT_TRUE(NoError(ReaderOrErr.takeError()));
    194     ProfileReader = std::move(ReaderOrErr.get());
    195   }
    196 
    197   void loadCoverageMapping(bool EmitFilenames = true) {
    198     readProfCounts();
    199     writeAndReadCoverageRegions(EmitFilenames);
    200 
    201     CoverageMappingReaderMock CovReader(OutputFunctions);
    202     auto CoverageOrErr = CoverageMapping::load(CovReader, *ProfileReader);
    203     ASSERT_TRUE(NoError(CoverageOrErr.takeError()));
    204     LoadedCoverage = std::move(CoverageOrErr.get());
    205   }
    206 };
    207 
    208 struct MaybeSparseCoverageMappingTest
    209     : public CoverageMappingTest,
    210       public ::testing::WithParamInterface<bool> {
    211   void SetUp() {
    212     CoverageMappingTest::SetUp();
    213     ProfileWriter.setOutputSparse(GetParam());
    214   }
    215 };
    216 
    217 TEST_P(MaybeSparseCoverageMappingTest, basic_write_read) {
    218   startFunction("func", 0x1234);
    219   addCMR(Counter::getCounter(0), "foo", 1, 1, 1, 1);
    220   addCMR(Counter::getCounter(1), "foo", 2, 1, 2, 2);
    221   addCMR(Counter::getZero(),     "foo", 3, 1, 3, 4);
    222   addCMR(Counter::getCounter(2), "foo", 4, 1, 4, 8);
    223   addCMR(Counter::getCounter(3), "bar", 1, 2, 3, 4);
    224 
    225   writeAndReadCoverageRegions();
    226   ASSERT_EQ(1u, InputFunctions.size());
    227   ASSERT_EQ(1u, OutputFunctions.size());
    228   InputFunctionCoverageData &Input = InputFunctions.back();
    229   OutputFunctionCoverageData &Output = OutputFunctions.back();
    230 
    231   size_t N = makeArrayRef(Input.Regions).size();
    232   ASSERT_EQ(N, Output.Regions.size());
    233   for (size_t I = 0; I < N; ++I) {
    234     ASSERT_EQ(Input.Regions[I].Count, Output.Regions[I].Count);
    235     ASSERT_EQ(Input.Regions[I].FileID, Output.Regions[I].FileID);
    236     ASSERT_EQ(Input.Regions[I].startLoc(), Output.Regions[I].startLoc());
    237     ASSERT_EQ(Input.Regions[I].endLoc(), Output.Regions[I].endLoc());
    238     ASSERT_EQ(Input.Regions[I].Kind, Output.Regions[I].Kind);
    239   }
    240 }
    241 
    242 TEST_P(MaybeSparseCoverageMappingTest,
    243        correct_deserialize_for_more_than_two_files) {
    244   const char *FileNames[] = {"bar", "baz", "foo"};
    245   static const unsigned N = array_lengthof(FileNames);
    246 
    247   startFunction("func", 0x1234);
    248   for (unsigned I = 0; I < N; ++I)
    249     // Use LineStart to hold the index of the file name
    250     // in order to preserve that information during possible sorting of CMRs.
    251     addCMR(Counter::getCounter(0), FileNames[I], I, 1, I, 1);
    252 
    253   writeAndReadCoverageRegions();
    254   ASSERT_EQ(1u, OutputFunctions.size());
    255   OutputFunctionCoverageData &Output = OutputFunctions.back();
    256 
    257   ASSERT_EQ(N, Output.Regions.size());
    258   ASSERT_EQ(N, Output.Filenames.size());
    259 
    260   for (unsigned I = 0; I < N; ++I) {
    261     ASSERT_GT(N, Output.Regions[I].FileID);
    262     ASSERT_GT(N, Output.Regions[I].LineStart);
    263     EXPECT_EQ(FileNames[Output.Regions[I].LineStart],
    264               Output.Filenames[Output.Regions[I].FileID]);
    265   }
    266 }
    267 
    268 TEST_P(MaybeSparseCoverageMappingTest, load_coverage_for_more_than_two_files) {
    269   InstrProfRecord Record("func", 0x1234, {0});
    270   NoError(ProfileWriter.addRecord(std::move(Record)));
    271 
    272   const char *FileNames[] = {"bar", "baz", "foo"};
    273   static const unsigned N = array_lengthof(FileNames);
    274 
    275   startFunction("func", 0x1234);
    276   for (unsigned I = 0; I < N; ++I)
    277     // Use LineStart to hold the index of the file name
    278     // in order to preserve that information during possible sorting of CMRs.
    279     addCMR(Counter::getCounter(0), FileNames[I], I, 1, I, 1);
    280 
    281   loadCoverageMapping();
    282 
    283   for (unsigned I = 0; I < N; ++I) {
    284     CoverageData Data = LoadedCoverage->getCoverageForFile(FileNames[I]);
    285     ASSERT_TRUE(!Data.empty());
    286     EXPECT_EQ(I, Data.begin()->Line);
    287   }
    288 }
    289 
    290 TEST_P(MaybeSparseCoverageMappingTest, load_coverage_for_several_functions) {
    291   InstrProfRecord RecordFunc1("func1", 0x1234, {10});
    292   NoError(ProfileWriter.addRecord(std::move(RecordFunc1)));
    293   InstrProfRecord RecordFunc2("func2", 0x2345, {20});
    294   NoError(ProfileWriter.addRecord(std::move(RecordFunc2)));
    295 
    296   startFunction("func1", 0x1234);
    297   addCMR(Counter::getCounter(0), "foo", 1, 1, 5, 5);
    298 
    299   startFunction("func2", 0x2345);
    300   addCMR(Counter::getCounter(0), "bar", 2, 2, 6, 6);
    301 
    302   loadCoverageMapping();
    303 
    304   const auto FunctionRecords = LoadedCoverage->getCoveredFunctions();
    305   EXPECT_EQ(2U, std::distance(FunctionRecords.begin(), FunctionRecords.end()));
    306   for (const auto &FunctionRecord : FunctionRecords) {
    307     CoverageData Data = LoadedCoverage->getCoverageForFunction(FunctionRecord);
    308     std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    309     ASSERT_EQ(2U, Segments.size());
    310     if (FunctionRecord.Name == "func1") {
    311       EXPECT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
    312       EXPECT_EQ(CoverageSegment(5, 5, false), Segments[1]);
    313     } else {
    314       ASSERT_EQ("func2", FunctionRecord.Name);
    315       EXPECT_EQ(CoverageSegment(2, 2, 20, true), Segments[0]);
    316       EXPECT_EQ(CoverageSegment(6, 6, false), Segments[1]);
    317     }
    318   }
    319 }
    320 
    321 TEST_P(MaybeSparseCoverageMappingTest, expansion_gets_first_counter) {
    322   startFunction("func", 0x1234);
    323   addCMR(Counter::getCounter(1), "foo", 10, 1, 10, 2);
    324   // This starts earlier in "foo", so the expansion should get its counter.
    325   addCMR(Counter::getCounter(2), "foo", 1, 1, 20, 1);
    326   addExpansionCMR("bar", "foo", 3, 3, 3, 3);
    327 
    328   writeAndReadCoverageRegions();
    329   ASSERT_EQ(1u, OutputFunctions.size());
    330   OutputFunctionCoverageData &Output = OutputFunctions.back();
    331 
    332   ASSERT_EQ(CounterMappingRegion::ExpansionRegion, Output.Regions[2].Kind);
    333   ASSERT_EQ(Counter::getCounter(2), Output.Regions[2].Count);
    334   ASSERT_EQ(3U, Output.Regions[2].LineStart);
    335 }
    336 
    337 TEST_P(MaybeSparseCoverageMappingTest, basic_coverage_iteration) {
    338   InstrProfRecord Record("func", 0x1234, {30, 20, 10, 0});
    339   NoError(ProfileWriter.addRecord(std::move(Record)));
    340 
    341   startFunction("func", 0x1234);
    342   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
    343   addCMR(Counter::getCounter(1), "file1", 1, 1, 4, 7);
    344   addCMR(Counter::getCounter(2), "file1", 5, 8, 9, 1);
    345   addCMR(Counter::getCounter(3), "file1", 10, 10, 11, 11);
    346   loadCoverageMapping();
    347 
    348   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
    349   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    350   ASSERT_EQ(7U, Segments.size());
    351   ASSERT_EQ(CoverageSegment(1, 1, 20, true),  Segments[0]);
    352   ASSERT_EQ(CoverageSegment(4, 7, 30, false), Segments[1]);
    353   ASSERT_EQ(CoverageSegment(5, 8, 10, true),  Segments[2]);
    354   ASSERT_EQ(CoverageSegment(9, 1, 30, false), Segments[3]);
    355   ASSERT_EQ(CoverageSegment(9, 9, false),     Segments[4]);
    356   ASSERT_EQ(CoverageSegment(10, 10, 0, true), Segments[5]);
    357   ASSERT_EQ(CoverageSegment(11, 11, false),   Segments[6]);
    358 }
    359 
    360 TEST_P(MaybeSparseCoverageMappingTest, uncovered_function) {
    361   startFunction("func", 0x1234);
    362   addCMR(Counter::getZero(), "file1", 1, 2, 3, 4);
    363   loadCoverageMapping();
    364 
    365   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
    366   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    367   ASSERT_EQ(2U, Segments.size());
    368   ASSERT_EQ(CoverageSegment(1, 2, 0, true), Segments[0]);
    369   ASSERT_EQ(CoverageSegment(3, 4, false),   Segments[1]);
    370 }
    371 
    372 TEST_P(MaybeSparseCoverageMappingTest, uncovered_function_with_mapping) {
    373   startFunction("func", 0x1234);
    374   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
    375   addCMR(Counter::getCounter(1), "file1", 1, 1, 4, 7);
    376   loadCoverageMapping();
    377 
    378   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
    379   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    380   ASSERT_EQ(3U, Segments.size());
    381   ASSERT_EQ(CoverageSegment(1, 1, 0, true),  Segments[0]);
    382   ASSERT_EQ(CoverageSegment(4, 7, 0, false), Segments[1]);
    383   ASSERT_EQ(CoverageSegment(9, 9, false),    Segments[2]);
    384 }
    385 
    386 TEST_P(MaybeSparseCoverageMappingTest, combine_regions) {
    387   InstrProfRecord Record("func", 0x1234, {10, 20, 30});
    388   NoError(ProfileWriter.addRecord(std::move(Record)));
    389 
    390   startFunction("func", 0x1234);
    391   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
    392   addCMR(Counter::getCounter(1), "file1", 3, 3, 4, 4);
    393   addCMR(Counter::getCounter(2), "file1", 3, 3, 4, 4);
    394   loadCoverageMapping();
    395 
    396   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
    397   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    398   ASSERT_EQ(4U, Segments.size());
    399   ASSERT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
    400   ASSERT_EQ(CoverageSegment(3, 3, 50, true), Segments[1]);
    401   ASSERT_EQ(CoverageSegment(4, 4, 10, false), Segments[2]);
    402   ASSERT_EQ(CoverageSegment(9, 9, false), Segments[3]);
    403 }
    404 
    405 TEST_P(MaybeSparseCoverageMappingTest,
    406        restore_combined_counter_after_nested_region) {
    407   InstrProfRecord Record("func", 0x1234, {10, 20, 40});
    408   NoError(ProfileWriter.addRecord(std::move(Record)));
    409 
    410   startFunction("func", 0x1234);
    411   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
    412   addCMR(Counter::getCounter(1), "file1", 1, 1, 9, 9);
    413   addCMR(Counter::getCounter(2), "file1", 3, 3, 5, 5);
    414   loadCoverageMapping();
    415 
    416   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
    417   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    418   ASSERT_EQ(4U, Segments.size());
    419   EXPECT_EQ(CoverageSegment(1, 1, 30, true), Segments[0]);
    420   EXPECT_EQ(CoverageSegment(3, 3, 40, true), Segments[1]);
    421   EXPECT_EQ(CoverageSegment(5, 5, 30, false), Segments[2]);
    422   EXPECT_EQ(CoverageSegment(9, 9, false), Segments[3]);
    423 }
    424 
    425 // If CodeRegions and ExpansionRegions cover the same area,
    426 // only counts of CodeRegions should be used.
    427 TEST_P(MaybeSparseCoverageMappingTest, dont_combine_expansions) {
    428   InstrProfRecord Record1("func", 0x1234, {10, 20});
    429   InstrProfRecord Record2("func", 0x1234, {0, 0});
    430   NoError(ProfileWriter.addRecord(std::move(Record1)));
    431   NoError(ProfileWriter.addRecord(std::move(Record2)));
    432 
    433   startFunction("func", 0x1234);
    434   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
    435   addCMR(Counter::getCounter(1), "file1", 3, 3, 4, 4);
    436   addCMR(Counter::getCounter(1), "include1", 6, 6, 7, 7);
    437   addExpansionCMR("file1", "include1", 3, 3, 4, 4);
    438   loadCoverageMapping();
    439 
    440   CoverageData Data = LoadedCoverage->getCoverageForFile("file1");
    441   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    442   ASSERT_EQ(4U, Segments.size());
    443   ASSERT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
    444   ASSERT_EQ(CoverageSegment(3, 3, 20, true), Segments[1]);
    445   ASSERT_EQ(CoverageSegment(4, 4, 10, false), Segments[2]);
    446   ASSERT_EQ(CoverageSegment(9, 9, false), Segments[3]);
    447 }
    448 
    449 // If an area is covered only by ExpansionRegions, they should be combinated.
    450 TEST_P(MaybeSparseCoverageMappingTest, combine_expansions) {
    451   InstrProfRecord Record("func", 0x1234, {2, 3, 7});
    452   NoError(ProfileWriter.addRecord(std::move(Record)));
    453 
    454   startFunction("func", 0x1234);
    455   addCMR(Counter::getCounter(1), "include1", 1, 1, 1, 10);
    456   addCMR(Counter::getCounter(2), "include2", 1, 1, 1, 10);
    457   addCMR(Counter::getCounter(0), "file", 1, 1, 5, 5);
    458   addExpansionCMR("file", "include1", 3, 1, 3, 5);
    459   addExpansionCMR("file", "include2", 3, 1, 3, 5);
    460 
    461   loadCoverageMapping();
    462 
    463   CoverageData Data = LoadedCoverage->getCoverageForFile("file");
    464   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    465   ASSERT_EQ(4U, Segments.size());
    466   EXPECT_EQ(CoverageSegment(1, 1, 2, true), Segments[0]);
    467   EXPECT_EQ(CoverageSegment(3, 1, 10, true), Segments[1]);
    468   EXPECT_EQ(CoverageSegment(3, 5, 2, false), Segments[2]);
    469   EXPECT_EQ(CoverageSegment(5, 5, false), Segments[3]);
    470 }
    471 
    472 TEST_P(MaybeSparseCoverageMappingTest, strip_filename_prefix) {
    473   InstrProfRecord Record("file1:func", 0x1234, {0});
    474   NoError(ProfileWriter.addRecord(std::move(Record)));
    475 
    476   startFunction("file1:func", 0x1234);
    477   addCMR(Counter::getCounter(0), "file1", 1, 1, 9, 9);
    478   loadCoverageMapping();
    479 
    480   std::vector<std::string> Names;
    481   for (const auto &Func : LoadedCoverage->getCoveredFunctions())
    482     Names.push_back(Func.Name);
    483   ASSERT_EQ(1U, Names.size());
    484   ASSERT_EQ("func", Names[0]);
    485 }
    486 
    487 TEST_P(MaybeSparseCoverageMappingTest, strip_unknown_filename_prefix) {
    488   InstrProfRecord Record("<unknown>:func", 0x1234, {0});
    489   NoError(ProfileWriter.addRecord(std::move(Record)));
    490 
    491   startFunction("<unknown>:func", 0x1234);
    492   addCMR(Counter::getCounter(0), "", 1, 1, 9, 9);
    493   loadCoverageMapping(/*EmitFilenames=*/false);
    494 
    495   std::vector<std::string> Names;
    496   for (const auto &Func : LoadedCoverage->getCoveredFunctions())
    497     Names.push_back(Func.Name);
    498   ASSERT_EQ(1U, Names.size());
    499   ASSERT_EQ("func", Names[0]);
    500 }
    501 
    502 TEST_P(MaybeSparseCoverageMappingTest, dont_detect_false_instantiations) {
    503   InstrProfRecord Record1("foo", 0x1234, {10});
    504   InstrProfRecord Record2("bar", 0x2345, {20});
    505   NoError(ProfileWriter.addRecord(std::move(Record1)));
    506   NoError(ProfileWriter.addRecord(std::move(Record2)));
    507 
    508   startFunction("foo", 0x1234);
    509   addCMR(Counter::getCounter(0), "expanded", 1, 1, 1, 10);
    510   addExpansionCMR("main", "expanded", 4, 1, 4, 5);
    511 
    512   startFunction("bar", 0x2345);
    513   addCMR(Counter::getCounter(0), "expanded", 1, 1, 1, 10);
    514   addExpansionCMR("main", "expanded", 9, 1, 9, 5);
    515 
    516   loadCoverageMapping();
    517 
    518   std::vector<const FunctionRecord *> Instantiations =
    519       LoadedCoverage->getInstantiations("expanded");
    520   ASSERT_TRUE(Instantiations.empty());
    521 }
    522 
    523 TEST_P(MaybeSparseCoverageMappingTest, load_coverage_for_expanded_file) {
    524   InstrProfRecord Record("func", 0x1234, {10});
    525   NoError(ProfileWriter.addRecord(std::move(Record)));
    526 
    527   startFunction("func", 0x1234);
    528   addCMR(Counter::getCounter(0), "expanded", 1, 1, 1, 10);
    529   addExpansionCMR("main", "expanded", 4, 1, 4, 5);
    530 
    531   loadCoverageMapping();
    532 
    533   CoverageData Data = LoadedCoverage->getCoverageForFile("expanded");
    534   std::vector<CoverageSegment> Segments(Data.begin(), Data.end());
    535   ASSERT_EQ(2U, Segments.size());
    536   EXPECT_EQ(CoverageSegment(1, 1, 10, true), Segments[0]);
    537   EXPECT_EQ(CoverageSegment(1, 10, false), Segments[1]);
    538 }
    539 
    540 INSTANTIATE_TEST_CASE_P(MaybeSparse, MaybeSparseCoverageMappingTest,
    541                         ::testing::Bool());
    542 
    543 } // end anonymous namespace
    544