llvm/tools/llvm-cov/SourceCoverageView.cpp

   1 //===- SourceCoverageView.cpp - Code coverage view for source code --------===//
   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 /// \file This class implements rendering for code coverage of source code.
  10 ///
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "SourceCoverageView.h"
  14 #include "SourceCoverageViewHTML.h"
  15 #include "SourceCoverageViewText.h"
  16 #include "llvm/ADT/SmallString.h"
  17 #include "llvm/ADT/StringExtras.h"
  18 #include "llvm/Support/FileSystem.h"
  19 #include "llvm/Support/LineIterator.h"
  20 #include "llvm/Support/Path.h"
  21
  22 using namespace llvm;
  23
  24 void CoveragePrinter::StreamDestructor::operator()(raw_ostream *OS) const {
  25   if (OS == &outs())
  26     return;
  27   delete OS;
  28 }
  29
  30 std::string CoveragePrinter::getOutputPath(StringRef Path, StringRef Extension,
  31                                            bool InToplevel,
  32                                            bool Relative) const {
  33   assert(!Extension.empty() && "The file extension may not be empty");
  34
  35   SmallString<256> FullPath;
  36
  37   if (!Relative)
  38     FullPath.append(Opts.ShowOutputDirectory);
  39
  40   if (!InToplevel)
  41     sys::path::append(FullPath, getCoverageDir());
  42
  43   SmallString<256> ParentPath = sys::path::parent_path(Path);
  44   sys::path::remove_dots(ParentPath, /*remove_dot_dot=*/true);
  45   sys::path::append(FullPath, sys::path::relative_path(ParentPath));
  46
  47   auto PathFilename = (sys::path::filename(Path) + "." + Extension).str();
  48   sys::path::append(FullPath, PathFilename);
  49   sys::path::native(FullPath);
  50
  51   return std::string(FullPath.str());
  52 }
  53
  54 Expected<CoveragePrinter::OwnedStream>
  55 CoveragePrinter::createOutputStream(StringRef Path, StringRef Extension,
  56                                     bool InToplevel) const {
  57   if (!Opts.hasOutputDirectory())
  58     return OwnedStream(&outs());
  59
  60   std::string FullPath = getOutputPath(Path, Extension, InToplevel, false);
  61
  62   auto ParentDir = sys::path::parent_path(FullPath);
  63   if (auto E = sys::fs::create_directories(ParentDir))
  64     return errorCodeToError(E);
  65
  66   std::error_code E;
  67   raw_ostream *RawStream =
  68       new raw_fd_ostream(FullPath, E, sys::fs::FA_Read | sys::fs::FA_Write);
  69   auto OS = CoveragePrinter::OwnedStream(RawStream);
  70   if (E)
  71     return errorCodeToError(E);
  72   return std::move(OS);
  73 }
  74
  75 std::unique_ptr<CoveragePrinter>
  76 CoveragePrinter::create(const CoverageViewOptions &Opts) {
  77   switch (Opts.Format) {
  78   case CoverageViewOptions::OutputFormat::Text:
  79     if (Opts.ShowDirectoryCoverage)
  80       return std::make_unique<CoveragePrinterTextDirectory>(Opts);
  81     return std::make_unique<CoveragePrinterText>(Opts);
  82   case CoverageViewOptions::OutputFormat::HTML:
  83     if (Opts.ShowDirectoryCoverage)
  84       return std::make_unique<CoveragePrinterHTMLDirectory>(Opts);
  85     return std::make_unique<CoveragePrinterHTML>(Opts);
  86   case CoverageViewOptions::OutputFormat::Lcov:
  87     // Unreachable because CodeCoverage.cpp should terminate with an error
  88     // before we get here.
  89     llvm_unreachable("Lcov format is not supported!");
  90   }
  91   llvm_unreachable("Unknown coverage output format!");
  92 }
  93
  94 unsigned SourceCoverageView::getFirstUncoveredLineNo() {
  95   const auto MinSegIt = find_if(CoverageInfo, [](const CoverageSegment &S) {
  96     return S.HasCount && S.Count == 0;
  97   });
  98
  99   // There is no uncovered line, return zero.
 100   if (MinSegIt == CoverageInfo.end())
 101     return 0;
 102
 103   return (*MinSegIt).Line;
 104 }
 105
 106 std::string SourceCoverageView::formatCount(uint64_t N) {
 107   std::string Number = utostr(N);
 108   int Len = Number.size();
 109   if (Len <= 3)
 110     return Number;
 111   int IntLen = Len % 3 == 0 ? 3 : Len % 3;
 112   std::string Result(Number.data(), IntLen);
 113   if (IntLen != 3) {
 114     Result.push_back('.');
 115     Result += Number.substr(IntLen, 3 - IntLen);
 116   }
 117   Result.push_back(" kMGTPEZY"[(Len - 1) / 3]);
 118   return Result;
 119 }
 120
 121 bool SourceCoverageView::shouldRenderRegionMarkers(
 122     const LineCoverageStats &LCS) const {
 123   if (!getOptions().ShowRegionMarkers)
 124     return false;
 125
 126   CoverageSegmentArray Segments = LCS.getLineSegments();
 127   if (Segments.empty())
 128     return false;
 129   for (unsigned I = 0, E = Segments.size() - 1; I < E; ++I) {
 130     const auto *CurSeg = Segments[I];
 131     if (!CurSeg->IsRegionEntry || CurSeg->Count == LCS.getExecutionCount())
 132       continue;
 133     return true;
 134   }
 135   return false;
 136 }
 137
 138 bool SourceCoverageView::hasSubViews() const {
 139   return !ExpansionSubViews.empty() || !InstantiationSubViews.empty() ||
 140          !BranchSubViews.empty();
 141 }
 142
 143 std::unique_ptr<SourceCoverageView>
 144 SourceCoverageView::create(StringRef SourceName, const MemoryBuffer &File,
 145                            const CoverageViewOptions &Options,
 146                            CoverageData &&CoverageInfo) {
 147   switch (Options.Format) {
 148   case CoverageViewOptions::OutputFormat::Text:
 149     return std::make_unique<SourceCoverageViewText>(
 150         SourceName, File, Options, std::move(CoverageInfo));
 151   case CoverageViewOptions::OutputFormat::HTML:
 152     return std::make_unique<SourceCoverageViewHTML>(
 153         SourceName, File, Options, std::move(CoverageInfo));
 154   case CoverageViewOptions::OutputFormat::Lcov:
 155     // Unreachable because CodeCoverage.cpp should terminate with an error
 156     // before we get here.
 157     llvm_unreachable("Lcov format is not supported!");
 158   }
 159   llvm_unreachable("Unknown coverage output format!");
 160 }
 161
 162 std::string SourceCoverageView::getSourceName() const {
 163   SmallString<128> SourceText(SourceName);
 164   sys::path::remove_dots(SourceText, /*remove_dot_dot=*/true);
 165   sys::path::native(SourceText);
 166   return std::string(SourceText.str());
 167 }
 168
 169 void SourceCoverageView::addExpansion(
 170     const CounterMappingRegion &Region,
 171     std::unique_ptr<SourceCoverageView> View) {
 172   ExpansionSubViews.emplace_back(Region, std::move(View));
 173 }
 174
 175 void SourceCoverageView::addBranch(unsigned Line,
 176                                    ArrayRef<CountedRegion> Regions,
 177                                    std::unique_ptr<SourceCoverageView> View) {
 178   BranchSubViews.emplace_back(Line, Regions, std::move(View));
 179 }
 180
 181 void SourceCoverageView::addInstantiation(
 182     StringRef FunctionName, unsigned Line,
 183     std::unique_ptr<SourceCoverageView> View) {
 184   InstantiationSubViews.emplace_back(FunctionName, Line, std::move(View));
 185 }
 186
 187 void SourceCoverageView::print(raw_ostream &OS, bool WholeFile,
 188                                bool ShowSourceName, bool ShowTitle,
 189                                unsigned ViewDepth) {
 190   if (ShowTitle)
 191     renderTitle(OS, "Coverage Report");
 192
 193   renderViewHeader(OS);
 194
 195   if (ShowSourceName)
 196     renderSourceName(OS, WholeFile);
 197
 198   renderTableHeader(OS, (ViewDepth > 0) ? 0 : getFirstUncoveredLineNo(),
 199                     ViewDepth);
 200
 201   // We need the expansions, instantiations, and branches sorted so we can go
 202   // through them while we iterate lines.
 203   llvm::stable_sort(ExpansionSubViews);
 204   llvm::stable_sort(InstantiationSubViews);
 205   llvm::stable_sort(BranchSubViews);
 206   auto NextESV = ExpansionSubViews.begin();
 207   auto EndESV = ExpansionSubViews.end();
 208   auto NextISV = InstantiationSubViews.begin();
 209   auto EndISV = InstantiationSubViews.end();
 210   auto NextBRV = BranchSubViews.begin();
 211   auto EndBRV = BranchSubViews.end();
 212
 213   // Get the coverage information for the file.
 214   auto StartSegment = CoverageInfo.begin();
 215   auto EndSegment = CoverageInfo.end();
 216   LineCoverageIterator LCI{CoverageInfo, 1};
 217   LineCoverageIterator LCIEnd = LCI.getEnd();
 218
 219   unsigned FirstLine = StartSegment != EndSegment ? StartSegment->Line : 0;
 220   for (line_iterator LI(File, /*SkipBlanks=*/false); !LI.is_at_eof();
 221        ++LI, ++LCI) {
 222     // If we aren't rendering the whole file, we need to filter out the prologue
 223     // and epilogue.
 224     if (!WholeFile) {
 225       if (LCI == LCIEnd)
 226         break;
 227       else if (LI.line_number() < FirstLine)
 228         continue;
 229     }
 230
 231     renderLinePrefix(OS, ViewDepth);
 232     if (getOptions().ShowLineNumbers)
 233       renderLineNumberColumn(OS, LI.line_number());
 234
 235     if (getOptions().ShowLineStats)
 236       renderLineCoverageColumn(OS, *LCI);
 237
 238     // If there are expansion subviews, we want to highlight the first one.
 239     unsigned ExpansionColumn = 0;
 240     if (NextESV != EndESV && NextESV->getLine() == LI.line_number() &&
 241         getOptions().Colors)
 242       ExpansionColumn = NextESV->getStartCol();
 243
 244     // Display the source code for the current line.
 245     renderLine(OS, {*LI, LI.line_number()}, *LCI, ExpansionColumn, ViewDepth);
 246
 247     // Show the region markers.
 248     if (shouldRenderRegionMarkers(*LCI))
 249       renderRegionMarkers(OS, *LCI, ViewDepth);
 250
 251     // Show the expansions, instantiations, and branches for this line.
 252     bool RenderedSubView = false;
 253     for (; NextESV != EndESV && NextESV->getLine() == LI.line_number();
 254          ++NextESV) {
 255       renderViewDivider(OS, ViewDepth + 1);
 256
 257       // Re-render the current line and highlight the expansion range for
 258       // this subview.
 259       if (RenderedSubView) {
 260         ExpansionColumn = NextESV->getStartCol();
 261         renderExpansionSite(OS, {*LI, LI.line_number()}, *LCI, ExpansionColumn,
 262                             ViewDepth);
 263         renderViewDivider(OS, ViewDepth + 1);
 264       }
 265
 266       renderExpansionView(OS, *NextESV, ViewDepth + 1);
 267       RenderedSubView = true;
 268     }
 269     for (; NextISV != EndISV && NextISV->Line == LI.line_number(); ++NextISV) {
 270       renderViewDivider(OS, ViewDepth + 1);
 271       renderInstantiationView(OS, *NextISV, ViewDepth + 1);
 272       RenderedSubView = true;
 273     }
 274     for (; NextBRV != EndBRV && NextBRV->Line == LI.line_number(); ++NextBRV) {
 275       renderViewDivider(OS, ViewDepth + 1);
 276       renderBranchView(OS, *NextBRV, ViewDepth + 1);
 277       RenderedSubView = true;
 278     }
 279     if (RenderedSubView)
 280       renderViewDivider(OS, ViewDepth + 1);
 281     renderLineSuffix(OS, ViewDepth);
 282   }
 283
 284   renderViewFooter(OS);
 285 }