unittests/ProfileData/CoverageMappingTest.cpp

   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/CoverageMapping.h"
  11 #include "llvm/ProfileData/CoverageMappingReader.h"
  12 #include "llvm/ProfileData/CoverageMappingWriter.h"
  13 #include "llvm/Support/raw_ostream.h"
  14 #include "gtest/gtest.h"
  15
  16 using namespace llvm;
  17 using namespace coverage;
  18
  19 namespace llvm {
  20 namespace coverage {
  21 void PrintTo(const Counter &C, ::std::ostream *os) {
  22   if (C.isZero())
  23     *os << "Zero";
  24   else if (C.isExpression())
  25     *os << "Expression " << C.getExpressionID();
  26   else
  27     *os << "Counter " << C.getCounterID();
  28 }
  29 }
  30 }
  31
  32 namespace {
  33
  34 static std::string writeCoverage(MutableArrayRef<CounterMappingRegion> Regions,
  35                                  int NumFiles) {
  36   SmallVector<unsigned, 8> FileIDs;
  37   for (int I = 0; I < NumFiles; ++I)
  38     FileIDs.push_back(I);
  39
  40   std::string Coverage;
  41   llvm::raw_string_ostream OS(Coverage);
  42   CoverageMappingWriter(FileIDs, None, Regions).write(OS);
  43   OS.flush();
  44
  45   return Coverage;
  46 }
  47
  48 static std::vector<CounterMappingRegion>
  49 readCoverageRegions(std::string Coverage, int NumFiles) {
  50   SmallVector<std::string, 8> Filenames;
  51   SmallVector<StringRef, 8> FilenameRefs;
  52   for (int I = 0; I < NumFiles; ++I) {
  53     Filenames.push_back("file" + std::to_string(I));
  54     FilenameRefs.push_back(Filenames.back());
  55   }
  56
  57   std::vector<StringRef> FuncFiles;
  58   std::vector<CounterExpression> Expressions;
  59   std::vector<CounterMappingRegion> Regions;
  60   RawCoverageMappingReader Reader(Coverage, FilenameRefs, FuncFiles,
  61                                   Expressions, Regions);
  62   if (Reader.read())
  63     // ASSERT doesn't work here, we'll just return an empty vector.
  64     Regions.clear();
  65   return Regions;
  66 }
  67
  68 TEST(CoverageMappingTest, basic_write_read) {
  69   int NumFiles = 2;
  70   CounterMappingRegion InputRegions[] = {
  71       CounterMappingRegion::makeRegion(Counter::getCounter(0), 0, 1, 1, 1, 1),
  72       CounterMappingRegion::makeRegion(Counter::getCounter(1), 0, 2, 1, 2, 2),
  73       CounterMappingRegion::makeRegion(Counter::getZero(), 0, 3, 1, 3, 4),
  74       CounterMappingRegion::makeRegion(Counter::getCounter(2), 0, 4, 1, 4, 8),
  75       CounterMappingRegion::makeRegion(Counter::getCounter(3), 1, 1, 2, 3, 4),
  76   };
  77   std::string Coverage = writeCoverage(InputRegions, NumFiles);
  78   std::vector<CounterMappingRegion> OutputRegions =
  79       readCoverageRegions(Coverage, NumFiles);
  80   ASSERT_FALSE(OutputRegions.empty());
  81
  82   size_t N = makeArrayRef(InputRegions).size();
  83   ASSERT_EQ(N, OutputRegions.size());
  84   for (size_t I = 0; I < N; ++I) {
  85     ASSERT_EQ(InputRegions[I].Count, OutputRegions[I].Count);
  86     ASSERT_EQ(InputRegions[I].FileID, OutputRegions[I].FileID);
  87     ASSERT_EQ(InputRegions[I].startLoc(), OutputRegions[I].startLoc());
  88     ASSERT_EQ(InputRegions[I].endLoc(), OutputRegions[I].endLoc());
  89     ASSERT_EQ(InputRegions[I].Kind, OutputRegions[I].Kind);
  90   }
  91 }
  92
  93 TEST(CoverageMappingTest, expansion_gets_first_counter) {
  94   int NumFiles = 2;
  95   CounterMappingRegion InputRegions[] = {
  96       CounterMappingRegion::makeRegion(Counter::getCounter(1), 0, 10, 1, 10, 2),
  97       // This starts earlier in file 0, so the expansion should get its counter.
  98       CounterMappingRegion::makeRegion(Counter::getCounter(2), 0, 1, 1, 20, 1),
  99       CounterMappingRegion::makeExpansion(1, 0, 3, 3, 3, 3),
 100   };
 101   std::string Coverage = writeCoverage(InputRegions, NumFiles);
 102   std::vector<CounterMappingRegion> OutputRegions =
 103       readCoverageRegions(Coverage, NumFiles);
 104   ASSERT_FALSE(OutputRegions.empty());
 105
 106   ASSERT_EQ(CounterMappingRegion::ExpansionRegion, OutputRegions[2].Kind);
 107   ASSERT_EQ(Counter::getCounter(2), OutputRegions[2].Count);
 108   ASSERT_EQ(3U, OutputRegions[2].LineStart);
 109 }
 110
 111
 112 } // end anonymous namespace