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//=- AnalysisBasedWarnings.h - Sema warnings based on libAnalysis -*- C++ -*-=//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines AnalysisBasedWarnings, a worker object used by Sema
// that issues warnings based on dataflow-analysis.
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_SEMA_ANALYSISBASEDWARNINGS_H
#define LLVM_CLANG_SEMA_ANALYSISBASEDWARNINGS_H
#include "clang/AST/Decl.h"
#include "llvm/ADT/DenseMap.h"
#include <memory>
namespace clang {
class Decl;
class FunctionDecl;
class QualType;
class Sema;
namespace sema {
class FunctionScopeInfo;
}
namespace sema {
class AnalysisBasedWarnings {
public:
class Policy {
friend class AnalysisBasedWarnings;
// The warnings to run.
LLVM_PREFERRED_TYPE(bool)
unsigned enableCheckFallThrough : 1;
LLVM_PREFERRED_TYPE(bool)
unsigned enableCheckUnreachable : 1;
LLVM_PREFERRED_TYPE(bool)
unsigned enableThreadSafetyAnalysis : 1;
LLVM_PREFERRED_TYPE(bool)
unsigned enableConsumedAnalysis : 1;
public:
Policy();
void disableCheckFallThrough() { enableCheckFallThrough = 0; }
};
private:
Sema &S;
Policy DefaultPolicy;
class InterProceduralData;
std::unique_ptr<InterProceduralData> IPData;
enum VisitFlag { NotVisited = 0, Visited = 1, Pending = 2 };
llvm::DenseMap<const FunctionDecl*, VisitFlag> VisitedFD;
/// \name Statistics
/// @{
/// Number of function CFGs built and analyzed.
unsigned NumFunctionsAnalyzed;
/// Number of functions for which the CFG could not be successfully
/// built.
unsigned NumFunctionsWithBadCFGs;
/// Total number of blocks across all CFGs.
unsigned NumCFGBlocks;
/// Largest number of CFG blocks for a single function analyzed.
unsigned MaxCFGBlocksPerFunction;
/// Total number of CFGs with variables analyzed for uninitialized
/// uses.
unsigned NumUninitAnalysisFunctions;
/// Total number of variables analyzed for uninitialized uses.
unsigned NumUninitAnalysisVariables;
/// Max number of variables analyzed for uninitialized uses in a single
/// function.
unsigned MaxUninitAnalysisVariablesPerFunction;
/// Total number of block visits during uninitialized use analysis.
unsigned NumUninitAnalysisBlockVisits;
/// Max number of block visits during uninitialized use analysis of
/// a single function.
unsigned MaxUninitAnalysisBlockVisitsPerFunction;
/// @}
public:
AnalysisBasedWarnings(Sema &s);
~AnalysisBasedWarnings();
void IssueWarnings(Policy P, FunctionScopeInfo *fscope,
const Decl *D, QualType BlockType);
// Issue warnings that require whole-translation-unit analysis.
void IssueWarnings(TranslationUnitDecl *D);
Policy getDefaultPolicy() { return DefaultPolicy; }
void PrintStats() const;
};
} // namespace sema
} // namespace clang
#endif
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