xref: /freebsd/contrib/llvm-project/llvm/tools/llvm-cov/CoverageReport.cpp (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71)
1 //===- CoverageReport.cpp - Code coverage report -------------------------===//
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 // This class implements rendering of a code coverage report.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "CoverageReport.h"
14 #include "RenderingSupport.h"
15 #include "llvm/ADT/DenseMap.h"
16 #include "llvm/Support/Format.h"
17 #include "llvm/Support/Path.h"
18 #include "llvm/Support/ThreadPool.h"
19 #include "llvm/Support/Threading.h"
20 #include <numeric>
21 
22 using namespace llvm;
23 
24 namespace {
25 
26 /// Helper struct which prints trimmed and aligned columns.
27 struct Column {
28   enum TrimKind { NoTrim, WidthTrim, RightTrim };
29 
30   enum AlignmentKind { LeftAlignment, RightAlignment };
31 
32   StringRef Str;
33   unsigned Width;
34   TrimKind Trim;
35   AlignmentKind Alignment;
36 
37   Column(StringRef Str, unsigned Width)
38       : Str(Str), Width(Width), Trim(WidthTrim), Alignment(LeftAlignment) {}
39 
40   Column &set(TrimKind Value) {
41     Trim = Value;
42     return *this;
43   }
44 
45   Column &set(AlignmentKind Value) {
46     Alignment = Value;
47     return *this;
48   }
49 
50   void render(raw_ostream &OS) const {
51     if (Str.size() <= Width) {
52       if (Alignment == RightAlignment) {
53         OS.indent(Width - Str.size());
54         OS << Str;
55         return;
56       }
57       OS << Str;
58       OS.indent(Width - Str.size());
59       return;
60     }
61 
62     switch (Trim) {
63     case NoTrim:
64       OS << Str;
65       break;
66     case WidthTrim:
67       OS << Str.substr(0, Width);
68       break;
69     case RightTrim:
70       OS << Str.substr(0, Width - 3) << "...";
71       break;
72     }
73   }
74 };
75 
76 raw_ostream &operator<<(raw_ostream &OS, const Column &Value) {
77   Value.render(OS);
78   return OS;
79 }
80 
81 Column column(StringRef Str, unsigned Width) { return Column(Str, Width); }
82 
83 template <typename T>
84 Column column(StringRef Str, unsigned Width, const T &Value) {
85   return Column(Str, Width).set(Value);
86 }
87 
88 // Specify the default column widths.
89 size_t FileReportColumns[] = {25, 12, 18, 10, 12, 18, 10,
90                               16, 16, 10, 12, 18, 10};
91 size_t FunctionReportColumns[] = {25, 10, 8, 8, 10, 8, 8};
92 
93 /// Adjust column widths to fit long file paths and function names.
94 void adjustColumnWidths(ArrayRef<StringRef> Files,
95                         ArrayRef<StringRef> Functions) {
96   for (StringRef Filename : Files)
97     FileReportColumns[0] = std::max(FileReportColumns[0], Filename.size());
98   for (StringRef Funcname : Functions)
99     FunctionReportColumns[0] =
100         std::max(FunctionReportColumns[0], Funcname.size());
101 }
102 
103 /// Prints a horizontal divider long enough to cover the given column
104 /// widths.
105 void renderDivider(ArrayRef<size_t> ColumnWidths, raw_ostream &OS) {
106   size_t Length = std::accumulate(ColumnWidths.begin(), ColumnWidths.end(), 0);
107   for (size_t I = 0; I < Length; ++I)
108     OS << '-';
109 }
110 
111 /// Return the color which correponds to the coverage percentage of a
112 /// certain metric.
113 template <typename T>
114 raw_ostream::Colors determineCoveragePercentageColor(const T &Info) {
115   if (Info.isFullyCovered())
116     return raw_ostream::GREEN;
117   return Info.getPercentCovered() >= 80.0 ? raw_ostream::YELLOW
118                                           : raw_ostream::RED;
119 }
120 
121 /// Get the number of redundant path components in each path in \p Paths.
122 unsigned getNumRedundantPathComponents(ArrayRef<std::string> Paths) {
123   // To start, set the number of redundant path components to the maximum
124   // possible value.
125   SmallVector<StringRef, 8> FirstPathComponents{sys::path::begin(Paths[0]),
126                                                 sys::path::end(Paths[0])};
127   unsigned NumRedundant = FirstPathComponents.size();
128 
129   for (unsigned I = 1, E = Paths.size(); NumRedundant > 0 && I < E; ++I) {
130     StringRef Path = Paths[I];
131     for (const auto &Component :
132          enumerate(make_range(sys::path::begin(Path), sys::path::end(Path)))) {
133       // Do not increase the number of redundant components: that would remove
134       // useful parts of already-visited paths.
135       if (Component.index() >= NumRedundant)
136         break;
137 
138       // Lower the number of redundant components when there's a mismatch
139       // between the first path, and the path under consideration.
140       if (FirstPathComponents[Component.index()] != Component.value()) {
141         NumRedundant = Component.index();
142         break;
143       }
144     }
145   }
146 
147   return NumRedundant;
148 }
149 
150 /// Determine the length of the longest redundant prefix of the paths in
151 /// \p Paths.
152 unsigned getRedundantPrefixLen(ArrayRef<std::string> Paths) {
153   // If there's at most one path, no path components are redundant.
154   if (Paths.size() <= 1)
155     return 0;
156 
157   unsigned PrefixLen = 0;
158   unsigned NumRedundant = getNumRedundantPathComponents(Paths);
159   auto Component = sys::path::begin(Paths[0]);
160   for (unsigned I = 0; I < NumRedundant; ++I) {
161     auto LastComponent = Component;
162     ++Component;
163     PrefixLen += Component - LastComponent;
164   }
165   return PrefixLen;
166 }
167 
168 } // end anonymous namespace
169 
170 namespace llvm {
171 
172 void CoverageReport::render(const FileCoverageSummary &File,
173                             raw_ostream &OS) const {
174   auto FileCoverageColor =
175       determineCoveragePercentageColor(File.RegionCoverage);
176   auto FuncCoverageColor =
177       determineCoveragePercentageColor(File.FunctionCoverage);
178   auto InstantiationCoverageColor =
179       determineCoveragePercentageColor(File.InstantiationCoverage);
180   auto LineCoverageColor = determineCoveragePercentageColor(File.LineCoverage);
181   SmallString<256> FileName = File.Name;
182   sys::path::remove_dots(FileName, /*remove_dot_dots=*/true);
183   sys::path::native(FileName);
184   OS << column(FileName, FileReportColumns[0], Column::NoTrim);
185 
186   if (Options.ShowRegionSummary) {
187     OS << format("%*u", FileReportColumns[1],
188                  (unsigned)File.RegionCoverage.getNumRegions());
189     Options.colored_ostream(OS, FileCoverageColor)
190         << format("%*u", FileReportColumns[2],
191                   (unsigned)(File.RegionCoverage.getNumRegions() -
192                              File.RegionCoverage.getCovered()));
193     if (File.RegionCoverage.getNumRegions())
194       Options.colored_ostream(OS, FileCoverageColor)
195           << format("%*.2f", FileReportColumns[3] - 1,
196                     File.RegionCoverage.getPercentCovered())
197           << '%';
198     else
199       OS << column("-", FileReportColumns[3], Column::RightAlignment);
200   }
201 
202   OS << format("%*u", FileReportColumns[4],
203                (unsigned)File.FunctionCoverage.getNumFunctions());
204   OS << format("%*u", FileReportColumns[5],
205                (unsigned)(File.FunctionCoverage.getNumFunctions() -
206                           File.FunctionCoverage.getExecuted()));
207   if (File.FunctionCoverage.getNumFunctions())
208     Options.colored_ostream(OS, FuncCoverageColor)
209         << format("%*.2f", FileReportColumns[6] - 1,
210                   File.FunctionCoverage.getPercentCovered())
211         << '%';
212   else
213     OS << column("-", FileReportColumns[6], Column::RightAlignment);
214 
215   if (Options.ShowInstantiationSummary) {
216     OS << format("%*u", FileReportColumns[7],
217                  (unsigned)File.InstantiationCoverage.getNumFunctions());
218     OS << format("%*u", FileReportColumns[8],
219                  (unsigned)(File.InstantiationCoverage.getNumFunctions() -
220                             File.InstantiationCoverage.getExecuted()));
221     if (File.InstantiationCoverage.getNumFunctions())
222       Options.colored_ostream(OS, InstantiationCoverageColor)
223           << format("%*.2f", FileReportColumns[9] - 1,
224                     File.InstantiationCoverage.getPercentCovered())
225           << '%';
226     else
227       OS << column("-", FileReportColumns[9], Column::RightAlignment);
228   }
229 
230   OS << format("%*u", FileReportColumns[10],
231                (unsigned)File.LineCoverage.getNumLines());
232   Options.colored_ostream(OS, LineCoverageColor) << format(
233       "%*u", FileReportColumns[11], (unsigned)(File.LineCoverage.getNumLines() -
234                                                File.LineCoverage.getCovered()));
235   if (File.LineCoverage.getNumLines())
236     Options.colored_ostream(OS, LineCoverageColor)
237         << format("%*.2f", FileReportColumns[12] - 1,
238                   File.LineCoverage.getPercentCovered())
239         << '%';
240   else
241     OS << column("-", FileReportColumns[12], Column::RightAlignment);
242   OS << "\n";
243 }
244 
245 void CoverageReport::render(const FunctionCoverageSummary &Function,
246                             const DemangleCache &DC,
247                             raw_ostream &OS) const {
248   auto FuncCoverageColor =
249       determineCoveragePercentageColor(Function.RegionCoverage);
250   auto LineCoverageColor =
251       determineCoveragePercentageColor(Function.LineCoverage);
252   OS << column(DC.demangle(Function.Name), FunctionReportColumns[0],
253                Column::RightTrim)
254      << format("%*u", FunctionReportColumns[1],
255                (unsigned)Function.RegionCoverage.getNumRegions());
256   Options.colored_ostream(OS, FuncCoverageColor)
257       << format("%*u", FunctionReportColumns[2],
258                 (unsigned)(Function.RegionCoverage.getNumRegions() -
259                            Function.RegionCoverage.getCovered()));
260   Options.colored_ostream(
261       OS, determineCoveragePercentageColor(Function.RegionCoverage))
262       << format("%*.2f", FunctionReportColumns[3] - 1,
263                 Function.RegionCoverage.getPercentCovered())
264       << '%';
265   OS << format("%*u", FunctionReportColumns[4],
266                (unsigned)Function.LineCoverage.getNumLines());
267   Options.colored_ostream(OS, LineCoverageColor)
268       << format("%*u", FunctionReportColumns[5],
269                 (unsigned)(Function.LineCoverage.getNumLines() -
270                            Function.LineCoverage.getCovered()));
271   Options.colored_ostream(
272       OS, determineCoveragePercentageColor(Function.LineCoverage))
273       << format("%*.2f", FunctionReportColumns[6] - 1,
274                 Function.LineCoverage.getPercentCovered())
275       << '%';
276   OS << "\n";
277 }
278 
279 void CoverageReport::renderFunctionReports(ArrayRef<std::string> Files,
280                                            const DemangleCache &DC,
281                                            raw_ostream &OS) {
282   bool isFirst = true;
283   for (StringRef Filename : Files) {
284     auto Functions = Coverage.getCoveredFunctions(Filename);
285 
286     if (isFirst)
287       isFirst = false;
288     else
289       OS << "\n";
290 
291     std::vector<StringRef> Funcnames;
292     for (const auto &F : Functions)
293       Funcnames.emplace_back(DC.demangle(F.Name));
294     adjustColumnWidths({}, Funcnames);
295 
296     OS << "File '" << Filename << "':\n";
297     OS << column("Name", FunctionReportColumns[0])
298        << column("Regions", FunctionReportColumns[1], Column::RightAlignment)
299        << column("Miss", FunctionReportColumns[2], Column::RightAlignment)
300        << column("Cover", FunctionReportColumns[3], Column::RightAlignment)
301        << column("Lines", FunctionReportColumns[4], Column::RightAlignment)
302        << column("Miss", FunctionReportColumns[5], Column::RightAlignment)
303        << column("Cover", FunctionReportColumns[6], Column::RightAlignment);
304     OS << "\n";
305     renderDivider(FunctionReportColumns, OS);
306     OS << "\n";
307     FunctionCoverageSummary Totals("TOTAL");
308     for (const auto &F : Functions) {
309       auto Function = FunctionCoverageSummary::get(Coverage, F);
310       ++Totals.ExecutionCount;
311       Totals.RegionCoverage += Function.RegionCoverage;
312       Totals.LineCoverage += Function.LineCoverage;
313       render(Function, DC, OS);
314     }
315     if (Totals.ExecutionCount) {
316       renderDivider(FunctionReportColumns, OS);
317       OS << "\n";
318       render(Totals, DC, OS);
319     }
320   }
321 }
322 
323 void CoverageReport::prepareSingleFileReport(const StringRef Filename,
324     const coverage::CoverageMapping *Coverage,
325     const CoverageViewOptions &Options, const unsigned LCP,
326     FileCoverageSummary *FileReport, const CoverageFilter *Filters) {
327   for (const auto &Group : Coverage->getInstantiationGroups(Filename)) {
328     std::vector<FunctionCoverageSummary> InstantiationSummaries;
329     for (const coverage::FunctionRecord *F : Group.getInstantiations()) {
330       if (!Filters->matches(*Coverage, *F))
331         continue;
332       auto InstantiationSummary = FunctionCoverageSummary::get(*Coverage, *F);
333       FileReport->addInstantiation(InstantiationSummary);
334       InstantiationSummaries.push_back(InstantiationSummary);
335     }
336     if (InstantiationSummaries.empty())
337       continue;
338 
339     auto GroupSummary =
340         FunctionCoverageSummary::get(Group, InstantiationSummaries);
341 
342     if (Options.Debug)
343       outs() << "InstantiationGroup: " << GroupSummary.Name << " with "
344              << "size = " << Group.size() << "\n";
345 
346     FileReport->addFunction(GroupSummary);
347   }
348 }
349 
350 std::vector<FileCoverageSummary> CoverageReport::prepareFileReports(
351     const coverage::CoverageMapping &Coverage, FileCoverageSummary &Totals,
352     ArrayRef<std::string> Files, const CoverageViewOptions &Options,
353     const CoverageFilter &Filters) {
354   unsigned LCP = getRedundantPrefixLen(Files);
355 
356   ThreadPoolStrategy S = hardware_concurrency(Options.NumThreads);
357   if (Options.NumThreads == 0) {
358     // If NumThreads is not specified, create one thread for each input, up to
359     // the number of hardware cores.
360     S = heavyweight_hardware_concurrency(Files.size());
361     S.Limit = true;
362   }
363   ThreadPool Pool(S);
364 
365   std::vector<FileCoverageSummary> FileReports;
366   FileReports.reserve(Files.size());
367 
368   for (StringRef Filename : Files) {
369     FileReports.emplace_back(Filename.drop_front(LCP));
370     Pool.async(&CoverageReport::prepareSingleFileReport, Filename,
371                &Coverage, Options, LCP, &FileReports.back(), &Filters);
372   }
373   Pool.wait();
374 
375   for (const auto &FileReport : FileReports)
376     Totals += FileReport;
377 
378   return FileReports;
379 }
380 
381 void CoverageReport::renderFileReports(
382     raw_ostream &OS, const CoverageFilters &IgnoreFilenameFilters) const {
383   std::vector<std::string> UniqueSourceFiles;
384   for (StringRef SF : Coverage.getUniqueSourceFiles()) {
385     // Apply ignore source files filters.
386     if (!IgnoreFilenameFilters.matchesFilename(SF))
387       UniqueSourceFiles.emplace_back(SF.str());
388   }
389   renderFileReports(OS, UniqueSourceFiles);
390 }
391 
392 void CoverageReport::renderFileReports(
393     raw_ostream &OS, ArrayRef<std::string> Files) const {
394   renderFileReports(OS, Files, CoverageFiltersMatchAll());
395 }
396 
397 void CoverageReport::renderFileReports(
398     raw_ostream &OS, ArrayRef<std::string> Files,
399     const CoverageFiltersMatchAll &Filters) const {
400   FileCoverageSummary Totals("TOTAL");
401   auto FileReports =
402       prepareFileReports(Coverage, Totals, Files, Options, Filters);
403 
404   std::vector<StringRef> Filenames;
405   for (const FileCoverageSummary &FCS : FileReports)
406     Filenames.emplace_back(FCS.Name);
407   adjustColumnWidths(Filenames, {});
408 
409   OS << column("Filename", FileReportColumns[0]);
410   if (Options.ShowRegionSummary)
411     OS << column("Regions", FileReportColumns[1], Column::RightAlignment)
412        << column("Missed Regions", FileReportColumns[2], Column::RightAlignment)
413        << column("Cover", FileReportColumns[3], Column::RightAlignment);
414   OS << column("Functions", FileReportColumns[4], Column::RightAlignment)
415      << column("Missed Functions", FileReportColumns[5], Column::RightAlignment)
416      << column("Executed", FileReportColumns[6], Column::RightAlignment);
417   if (Options.ShowInstantiationSummary)
418     OS << column("Instantiations", FileReportColumns[7], Column::RightAlignment)
419        << column("Missed Insts.", FileReportColumns[8], Column::RightAlignment)
420        << column("Executed", FileReportColumns[9], Column::RightAlignment);
421   OS << column("Lines", FileReportColumns[10], Column::RightAlignment)
422      << column("Missed Lines", FileReportColumns[11], Column::RightAlignment)
423      << column("Cover", FileReportColumns[12], Column::RightAlignment) << "\n";
424   renderDivider(FileReportColumns, OS);
425   OS << "\n";
426 
427   bool EmptyFiles = false;
428   for (const FileCoverageSummary &FCS : FileReports) {
429     if (FCS.FunctionCoverage.getNumFunctions())
430       render(FCS, OS);
431     else
432       EmptyFiles = true;
433   }
434 
435   if (EmptyFiles && Filters.empty()) {
436     OS << "\n"
437        << "Files which contain no functions:\n";
438 
439     for (const FileCoverageSummary &FCS : FileReports)
440       if (!FCS.FunctionCoverage.getNumFunctions())
441         render(FCS, OS);
442   }
443 
444   renderDivider(FileReportColumns, OS);
445   OS << "\n";
446   render(Totals, OS);
447 }
448 
449 } // end namespace llvm
450