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