forked from OSchip/llvm-project
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
//===---- CoverageMappingGen.h - Coverage mapping generation ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Instrumentation-based code coverage mapping generator
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
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#define LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Frontend/CodeGenOptions.h"
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#include "clang/Lex/PPCallbacks.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/Support/raw_ostream.h"
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namespace clang {
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class LangOptions;
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class SourceManager;
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class FileEntry;
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class Preprocessor;
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class Decl;
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class Stmt;
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/// \brief Stores additional source code information like skipped ranges which
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/// is required by the coverage mapping generator and is obtained from
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/// the preprocessor.
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class CoverageSourceInfo : public PPCallbacks {
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std::vector<SourceRange> SkippedRanges;
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public:
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ArrayRef<SourceRange> getSkippedRanges() const { return SkippedRanges; }
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void SourceRangeSkipped(SourceRange Range) override;
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};
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namespace CodeGen {
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class CodeGenModule;
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/// \brief Organizes the cross-function state that is used while generating
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/// code coverage mapping data.
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class CoverageMappingModuleGen {
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CodeGenModule &CGM;
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CoverageSourceInfo &SourceInfo;
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llvm::SmallDenseMap<const FileEntry *, unsigned, 8> FileEntries;
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std::vector<llvm::Constant *> FunctionRecords;
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llvm::StructType *FunctionRecordTy;
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std::string CoverageMappings;
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public:
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CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
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: CGM(CGM), SourceInfo(SourceInfo), FunctionRecordTy(nullptr) {}
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CoverageSourceInfo &getSourceInfo() const {
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return SourceInfo;
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}
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/// \brief Add a function's coverage mapping record to the collection of the
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/// function mapping records.
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void addFunctionMappingRecord(llvm::GlobalVariable *FunctionName,
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StringRef FunctionNameValue,
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uint64_t FunctionHash,
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const std::string &CoverageMapping);
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/// \brief Emit the coverage mapping data for a translation unit.
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void emit();
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/// \brief Return the coverage mapping translation unit file id
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/// for the given file.
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unsigned getFileID(const FileEntry *File);
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};
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/// \brief Organizes the per-function state that is used while generating
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/// code coverage mapping data.
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class CoverageMappingGen {
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CoverageMappingModuleGen &CVM;
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SourceManager &SM;
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const LangOptions &LangOpts;
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llvm::DenseMap<const Stmt *, unsigned> *CounterMap;
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public:
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CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
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const LangOptions &LangOpts)
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: CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(nullptr) {}
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CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
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const LangOptions &LangOpts,
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llvm::DenseMap<const Stmt *, unsigned> *CounterMap)
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: CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(CounterMap) {}
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/// \brief Emit the coverage mapping data which maps the regions of
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/// code to counters that will be used to find the execution
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/// counts for those regions.
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void emitCounterMapping(const Decl *D, llvm::raw_ostream &OS);
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/// \brief Emit the coverage mapping data for an unused function.
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/// It creates mapping regions with the counter of zero.
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void emitEmptyMapping(const Decl *D, llvm::raw_ostream &OS);
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};
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} // end namespace CodeGen
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} // end namespace clang
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#endif
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