1 //===---- CoverageMappingGen.h - Coverage mapping generation ----*- C++ -*-===//
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
7 //===----------------------------------------------------------------------===//
9 // Instrumentation-based code coverage mapping generator
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
14 #define LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
16 #include "clang/Basic/LLVM.h"
17 #include "clang/Basic/SourceLocation.h"
18 #include "clang/Lex/PPCallbacks.h"
19 #include "llvm/ADT/DenseMap.h"
20 #include "llvm/IR/GlobalValue.h"
21 #include "llvm/Support/raw_ostream.h"
32 /// Stores additional source code information like skipped ranges which
33 /// is required by the coverage mapping generator and is obtained from
35 class CoverageSourceInfo : public PPCallbacks {
36 std::vector<SourceRange> SkippedRanges;
38 ArrayRef<SourceRange> getSkippedRanges() const { return SkippedRanges; }
40 void SourceRangeSkipped(SourceRange Range, SourceLocation EndifLoc) override;
47 /// Organizes the cross-function state that is used while generating
48 /// code coverage mapping data.
49 class CoverageMappingModuleGen {
51 CoverageSourceInfo &SourceInfo;
52 llvm::SmallDenseMap<const FileEntry *, unsigned, 8> FileEntries;
53 std::vector<llvm::Constant *> FunctionRecords;
54 std::vector<llvm::Constant *> FunctionNames;
55 llvm::StructType *FunctionRecordTy;
56 std::vector<std::string> CoverageMappings;
59 CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
60 : CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}
62 CoverageSourceInfo &getSourceInfo() const {
66 /// Add a function's coverage mapping record to the collection of the
67 /// function mapping records.
68 void addFunctionMappingRecord(llvm::GlobalVariable *FunctionName,
69 StringRef FunctionNameValue,
70 uint64_t FunctionHash,
71 const std::string &CoverageMapping,
74 /// Emit the coverage mapping data for a translation unit.
77 /// Return the coverage mapping translation unit file id
78 /// for the given file.
79 unsigned getFileID(const FileEntry *File);
82 /// Organizes the per-function state that is used while generating
83 /// code coverage mapping data.
84 class CoverageMappingGen {
85 CoverageMappingModuleGen &CVM;
87 const LangOptions &LangOpts;
88 llvm::DenseMap<const Stmt *, unsigned> *CounterMap;
91 CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
92 const LangOptions &LangOpts)
93 : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(nullptr) {}
95 CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
96 const LangOptions &LangOpts,
97 llvm::DenseMap<const Stmt *, unsigned> *CounterMap)
98 : CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(CounterMap) {}
100 /// Emit the coverage mapping data which maps the regions of
101 /// code to counters that will be used to find the execution
102 /// counts for those regions.
103 void emitCounterMapping(const Decl *D, llvm::raw_ostream &OS);
105 /// Emit the coverage mapping data for an unused function.
106 /// It creates mapping regions with the counter of zero.
107 void emitEmptyMapping(const Decl *D, llvm::raw_ostream &OS);
110 } // end namespace CodeGen
111 } // end namespace clang