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 #include <string>
  17
  18 using namespace llvm;
  19 using namespace coverage;
  20
  21 namespace llvm {
  22 namespace coverage {
  23 void PrintTo(const Counter &C, ::std::ostream *os) {
  24   if (C.isZero())
  25     *os << "Zero";
  26   else if (C.isExpression())
  27     *os << "Expression " << C.getExpressionID();
  28   else
  29     *os << "Counter " << C.getCounterID();
  30 }
  31 }
  32 }
  33
  34 namespace {
  35
  36 static std::string writeCoverage(MutableArrayRef<CounterMappingRegion> Regions,
  37                                  int NumFiles) {
  38   SmallVector<unsigned, 8> FileIDs;
  39   for (int I = 0; I < NumFiles; ++I)
  40     FileIDs.push_back(I);
  41
  42   std::string Coverage;
  43   llvm::raw_string_ostream OS(Coverage);
  44   CoverageMappingWriter(FileIDs, None, Regions).write(OS);
  45   OS.flush();
  46
  47   return Coverage;
  48 }
  49
  50 static std::vector<CounterMappingRegion>
  51 readCoverageRegions(std::string Coverage, int NumFiles) {
  52   SmallVector<std::string, 8> Filenames;
  53   SmallVector<StringRef, 8> FilenameRefs;
  54   for (int I = 0; I < NumFiles; ++I) {
  55     Filenames.push_back("file" + std::to_string(I));
  56     FilenameRefs.push_back(Filenames.back());
  57   }
  58
  59   std::vector<StringRef> FuncFiles;
  60   std::vector<CounterExpression> Expressions;
  61   std::vector<CounterMappingRegion> Regions;
  62   RawCoverageMappingReader Reader(Coverage, FilenameRefs, FuncFiles,
  63                                   Expressions, Regions);
  64   if (Reader.read())
  65     // ASSERT doesn't work here, we'll just return an empty vector.
  66     Regions.clear();
  67   return Regions;
  68 }
  69
  70 TEST(CoverageMappingTest, basic_write_read) {
  71   int NumFiles = 2;
  72   CounterMappingRegion InputRegions[] = {
  73       CounterMappingRegion::makeRegion(Counter::getCounter(0), 0, 1, 1, 1, 1),
  74       CounterMappingRegion::makeRegion(Counter::getCounter(1), 0, 2, 1, 2, 2),
  75       CounterMappingRegion::makeRegion(Counter::getZero(), 0, 3, 1, 3, 4),
  76       CounterMappingRegion::makeRegion(Counter::getCounter(2), 0, 4, 1, 4, 8),
  77       CounterMappingRegion::makeRegion(Counter::getCounter(3), 1, 1, 2, 3, 4),
  78   };
  79   std::string Coverage = writeCoverage(InputRegions, NumFiles);
  80   std::vector<CounterMappingRegion> OutputRegions =
  81       readCoverageRegions(Coverage, NumFiles);
  82   ASSERT_FALSE(OutputRegions.empty());
  83
  84   size_t N = makeArrayRef(InputRegions).size();
  85   ASSERT_EQ(N, OutputRegions.size());
  86   for (size_t I = 0; I < N; ++I) {
  87     ASSERT_EQ(InputRegions[I].Count, OutputRegions[I].Count);
  88     ASSERT_EQ(InputRegions[I].FileID, OutputRegions[I].FileID);
  89     ASSERT_EQ(InputRegions[I].startLoc(), OutputRegions[I].startLoc());
  90     ASSERT_EQ(InputRegions[I].endLoc(), OutputRegions[I].endLoc());
  91     ASSERT_EQ(InputRegions[I].Kind, OutputRegions[I].Kind);
  92   }
  93 }
  94
  95 TEST(CoverageMappingTest, expansion_gets_first_counter) {
  96   int NumFiles = 2;
  97   CounterMappingRegion InputRegions[] = {
  98       CounterMappingRegion::makeRegion(Counter::getCounter(1), 0, 10, 1, 10, 2),
  99       // This starts earlier in file 0, so the expansion should get its counter.
 100       CounterMappingRegion::makeRegion(Counter::getCounter(2), 0, 1, 1, 20, 1),
 101       CounterMappingRegion::makeExpansion(1, 0, 3, 3, 3, 3),
 102   };
 103   std::string Coverage = writeCoverage(InputRegions, NumFiles);
 104   std::vector<CounterMappingRegion> OutputRegions =
 105       readCoverageRegions(Coverage, NumFiles);
 106   ASSERT_FALSE(OutputRegions.empty());
 107
 108   ASSERT_EQ(CounterMappingRegion::ExpansionRegion, OutputRegions[2].Kind);
 109   ASSERT_EQ(Counter::getCounter(2), OutputRegions[2].Count);
 110   ASSERT_EQ(3U, OutputRegions[2].LineStart);
 111 }
 112
 113
 114 } // end anonymous namespace