1 //===---- CoverageMappingGen.h - Coverage mapping generation ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Instrumentation-based code coverage mapping generator
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
15 #define LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
17 #include "clang/Basic/LLVM.h"
18 #include "clang/Basic/SourceLocation.h"
19 #include "clang/Frontend/CodeGenOptions.h"
20 #include "clang/Lex/PPCallbacks.h"
21 #include "llvm/ADT/DenseMap.h"
22 #include "llvm/IR/GlobalValue.h"
23 #include "llvm/Support/raw_ostream.h"
34 /// \brief Stores additional source code information like skipped ranges which
35 /// is required by the coverage mapping generator and is obtained from
37 class CoverageSourceInfo : public PPCallbacks {
38 std::vector<SourceRange> SkippedRanges;
40 ArrayRef<SourceRange> getSkippedRanges() const { return SkippedRanges; }
42 void SourceRangeSkipped(SourceRange Range) override;
49 /// \brief Organizes the cross-function state that is used while generating
50 /// code coverage mapping data.
51 class CoverageMappingModuleGen {
53 CoverageSourceInfo &SourceInfo;
54 llvm::SmallDenseMap<const FileEntry *, unsigned, 8> FileEntries;
55 std::vector<llvm::Constant *> FunctionRecords;
56 std::vector<llvm::Constant *> FunctionNames;
57 llvm::StructType *FunctionRecordTy;
58 std::vector<std::string> CoverageMappings;
61 CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
62 : CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}
64 CoverageSourceInfo &getSourceInfo() const {
68 /// \brief Add a function's coverage mapping record to the collection of the
69 /// function mapping records.
70 void addFunctionMappingRecord(llvm::GlobalVariable *FunctionName,
71 StringRef FunctionNameValue,
72 uint64_t FunctionHash,
73 const std::string &CoverageMapping,
76 /// \brief Emit the coverage mapping data for a translation unit.
79 /// \brief Return the coverage mapping translation unit file id
80 /// for the given file.
81 unsigned getFileID(const FileEntry *File);
84 /// \brief Organizes the per-function state that is used while generating
85 /// code coverage mapping data.
86 class CoverageMappingGen {
87 CoverageMappingModuleGen &CVM;
89 const LangOptions &LangOpts;
90 llvm::DenseMap<const Stmt *, unsigned> *CounterMap;
93 CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
94 const LangOptions &LangOpts)
95 : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(nullptr) {}
97 CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
98 const LangOptions &LangOpts,
99 llvm::DenseMap<const Stmt *, unsigned> *CounterMap)
100 : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(CounterMap) {}
102 /// \brief Emit the coverage mapping data which maps the regions of
103 /// code to counters that will be used to find the execution
104 /// counts for those regions.
105 void emitCounterMapping(const Decl *D, llvm::raw_ostream &OS);
107 /// \brief Emit the coverage mapping data for an unused function.
108 /// It creates mapping regions with the counter of zero.
109 void emitEmptyMapping(const Decl *D, llvm::raw_ostream &OS);
112 } // end namespace CodeGen
113 } // end namespace clang