1 //===- llvm-cov.cpp - LLVM coverage tool ----------------------------------===// 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 // llvm-cov is a command line tools to analyze and report coverage information. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/ADT/SmallString.h" 15 #include "llvm/Support/CommandLine.h" 16 #include "llvm/Support/FileSystem.h" 17 #include "llvm/Support/GCOV.h" 18 #include "llvm/Support/ManagedStatic.h" 19 #include "llvm/Support/MemoryObject.h" 20 #include "llvm/Support/Path.h" 21 #include "llvm/Support/PrettyStackTrace.h" 22 #include "llvm/Support/Signals.h" 23 #include "llvm/Support/system_error.h" 24 using namespace llvm; 25 26 static cl::opt<std::string> SourceFile(cl::Positional, cl::Required, 27 cl::desc("SOURCEFILE")); 28 29 static cl::opt<bool> AllBlocks("a", cl::Grouping, cl::init(false), 30 cl::desc("Display all basic blocks")); 31 static cl::alias AllBlocksA("all-blocks", cl::aliasopt(AllBlocks)); 32 33 static cl::opt<bool> BranchProb("b", cl::Grouping, cl::init(false), 34 cl::desc("Display branch probabilities")); 35 static cl::alias BranchProbA("branch-probabilities", cl::aliasopt(BranchProb)); 36 37 static cl::opt<bool> BranchCount("c", cl::Grouping, cl::init(false), 38 cl::desc("Display branch counts instead " 39 "of percentages (requires -b)")); 40 static cl::alias BranchCountA("branch-counts", cl::aliasopt(BranchCount)); 41 42 static cl::opt<bool> FuncSummary("f", cl::Grouping, cl::init(false), 43 cl::desc("Show coverage for each function")); 44 static cl::alias FuncSummaryA("function-summaries", cl::aliasopt(FuncSummary)); 45 46 static cl::opt<std::string> 47 ObjectDir("o", cl::value_desc("DIR|FILE"), cl::init(""), 48 cl::desc("Find objects in DIR or based on FILE's path")); 49 static cl::alias ObjectDirA("object-directory", cl::aliasopt(ObjectDir)); 50 static cl::alias ObjectDirB("object-file", cl::aliasopt(ObjectDir)); 51 52 static cl::opt<bool> PreservePaths("p", cl::Grouping, cl::init(false), 53 cl::desc("Preserve path components")); 54 static cl::alias PreservePathsA("preserve-paths", cl::aliasopt(PreservePaths)); 55 56 static cl::opt<bool> UncondBranch("u", cl::Grouping, cl::init(false), 57 cl::desc("Display unconditional branch info " 58 "(requires -b)")); 59 static cl::alias UncondBranchA("unconditional-branches", 60 cl::aliasopt(UncondBranch)); 61 62 static cl::OptionCategory DebugCat("Internal and debugging options"); 63 static cl::opt<bool> DumpGCOV("dump", cl::init(false), cl::cat(DebugCat), 64 cl::desc("Dump the gcov file to stderr")); 65 static cl::opt<std::string> InputGCNO("gcno", cl::cat(DebugCat), cl::init(""), 66 cl::desc("Override inferred gcno file")); 67 static cl::opt<std::string> InputGCDA("gcda", cl::cat(DebugCat), cl::init(""), 68 cl::desc("Override inferred gcda file")); 69 70 //===----------------------------------------------------------------------===// 71 int main(int argc, char **argv) { 72 // Print a stack trace if we signal out. 73 sys::PrintStackTraceOnErrorSignal(); 74 PrettyStackTraceProgram X(argc, argv); 75 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 76 77 cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n"); 78 79 SmallString<128> CoverageFileStem(ObjectDir); 80 if (CoverageFileStem.empty()) { 81 // If no directory was specified with -o, look next to the source file. 82 CoverageFileStem = sys::path::parent_path(SourceFile); 83 sys::path::append(CoverageFileStem, sys::path::stem(SourceFile)); 84 } else if (sys::fs::is_directory(ObjectDir)) 85 // A directory name was given. Use it and the source file name. 86 sys::path::append(CoverageFileStem, sys::path::stem(SourceFile)); 87 else 88 // A file was given. Ignore the source file and look next to this file. 89 sys::path::replace_extension(CoverageFileStem, ""); 90 91 if (InputGCNO.empty()) 92 InputGCNO = (CoverageFileStem.str() + ".gcno").str(); 93 if (InputGCDA.empty()) 94 InputGCDA = (CoverageFileStem.str() + ".gcda").str(); 95 96 GCOVFile GF; 97 98 std::unique_ptr<MemoryBuffer> GCNO_Buff; 99 if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputGCNO, GCNO_Buff)) { 100 errs() << InputGCNO << ": " << ec.message() << "\n"; 101 return 1; 102 } 103 GCOVBuffer GCNO_GB(GCNO_Buff.get()); 104 if (!GF.readGCNO(GCNO_GB)) { 105 errs() << "Invalid .gcno File!\n"; 106 return 1; 107 } 108 109 std::unique_ptr<MemoryBuffer> GCDA_Buff; 110 if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputGCDA, GCDA_Buff)) { 111 if (ec != errc::no_such_file_or_directory) { 112 errs() << InputGCDA << ": " << ec.message() << "\n"; 113 return 1; 114 } 115 // Clear the filename to make it clear we didn't read anything. 116 InputGCDA = "-"; 117 } else { 118 GCOVBuffer GCDA_GB(GCDA_Buff.get()); 119 if (!GF.readGCDA(GCDA_GB)) { 120 errs() << "Invalid .gcda File!\n"; 121 return 1; 122 } 123 } 124 125 if (DumpGCOV) 126 GF.dump(); 127 128 GCOVOptions Options(AllBlocks, BranchProb, BranchCount, FuncSummary, 129 PreservePaths, UncondBranch); 130 FileInfo FI(Options); 131 GF.collectLineCounts(FI); 132 FI.print(InputGCNO, InputGCDA); 133 return 0; 134 } 135