Coverage Report

Created: 2020-09-22 08:39

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/Analysis/Analyses/ExprMutationAnalyzer.h
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//===---------- ExprMutationAnalyzer.h ------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_ANALYSIS_ANALYSES_EXPRMUTATIONANALYZER_H
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#define LLVM_CLANG_ANALYSIS_ANALYSES_EXPRMUTATIONANALYZER_H
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#include <type_traits>
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#include "clang/AST/AST.h"
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#include "clang/ASTMatchers/ASTMatchers.h"
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#include "llvm/ADT/DenseMap.h"
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namespace clang {
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class FunctionParmMutationAnalyzer;
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/// Analyzes whether any mutative operations are applied to an expression within
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/// a given statement.
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class ExprMutationAnalyzer {
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public:
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  ExprMutationAnalyzer(const Stmt &Stm, ASTContext &Context)
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      : Stm(Stm), Context(Context) {}
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  bool isMutated(const Expr *Exp) { return findMutation(Exp) != nullptr; }
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  bool isMutated(const Decl *Dec) { return findMutation(Dec) != nullptr; }
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  const Stmt *findMutation(const Expr *Exp);
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  const Stmt *findMutation(const Decl *Dec);
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  bool isPointeeMutated(const Expr *Exp) {
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    return findPointeeMutation(Exp) != nullptr;
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  }
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  bool isPointeeMutated(const Decl *Dec) {
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    return findPointeeMutation(Dec) != nullptr;
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  }
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  const Stmt *findPointeeMutation(const Expr *Exp);
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  const Stmt *findPointeeMutation(const Decl *Dec);
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private:
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  using MutationFinder = const Stmt *(ExprMutationAnalyzer::*)(const Expr *);
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  using ResultMap = llvm::DenseMap<const Expr *, const Stmt *>;
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  const Stmt *findMutationMemoized(const Expr *Exp,
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                                   llvm::ArrayRef<MutationFinder> Finders,
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                                   ResultMap &MemoizedResults);
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  const Stmt *tryEachDeclRef(const Decl *Dec, MutationFinder Finder);
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  bool isUnevaluated(const Expr *Exp);
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  const Stmt *findExprMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
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  const Stmt *findDeclMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
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  const Stmt *
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  findExprPointeeMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
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  const Stmt *
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  findDeclPointeeMutation(ArrayRef<ast_matchers::BoundNodes> Matches);
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  const Stmt *findDirectMutation(const Expr *Exp);
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  const Stmt *findMemberMutation(const Expr *Exp);
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  const Stmt *findArrayElementMutation(const Expr *Exp);
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  const Stmt *findCastMutation(const Expr *Exp);
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  const Stmt *findRangeLoopMutation(const Expr *Exp);
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  const Stmt *findReferenceMutation(const Expr *Exp);
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  const Stmt *findFunctionArgMutation(const Expr *Exp);
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  const Stmt &Stm;
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  ASTContext &Context;
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  llvm::DenseMap<const FunctionDecl *,
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                 std::unique_ptr<FunctionParmMutationAnalyzer>>
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      FuncParmAnalyzer;
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  ResultMap Results;
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  ResultMap PointeeResults;
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};
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// A convenient wrapper around ExprMutationAnalyzer for analyzing function
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// params.
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class FunctionParmMutationAnalyzer {
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public:
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  FunctionParmMutationAnalyzer(const FunctionDecl &Func, ASTContext &Context);
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  bool isMutated(const ParmVarDecl *Parm) {
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    return findMutation(Parm) != nullptr;
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  }
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  const Stmt *findMutation(const ParmVarDecl *Parm);
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private:
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  ExprMutationAnalyzer BodyAnalyzer;
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  llvm::DenseMap<const ParmVarDecl *, const Stmt *> Results;
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};
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} // namespace clang
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#endif // LLVM_CLANG_ANALYSIS_ANALYSES_EXPRMUTATIONANALYZER_H