1 //=- AnalysisBasedWarnings.h - Sema warnings based on libAnalysis -*- C++ -*-=// 2 // 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 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines AnalysisBasedWarnings, a worker object used by Sema 10 // that issues warnings based on dataflow-analysis. 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_CLANG_SEMA_ANALYSISBASEDWARNINGS_H 14 #define LLVM_CLANG_SEMA_ANALYSISBASEDWARNINGS_H 15 16 #include "clang/AST/Decl.h" 17 #include "llvm/ADT/DenseMap.h" 18 #include <memory> 19 20 namespace clang { 21 22 class Decl; 23 class FunctionDecl; 24 class QualType; 25 class Sema; 26 namespace sema { 27 class FunctionScopeInfo; 28 } 29 30 namespace sema { 31 32 class AnalysisBasedWarnings { 33 public: 34 class Policy { 35 friend class AnalysisBasedWarnings; 36 // The warnings to run. 37 unsigned enableCheckFallThrough : 1; 38 unsigned enableCheckUnreachable : 1; 39 unsigned enableThreadSafetyAnalysis : 1; 40 unsigned enableConsumedAnalysis : 1; 41 public: 42 Policy(); 43 void disableCheckFallThrough() { enableCheckFallThrough = 0; } 44 }; 45 46 private: 47 Sema &S; 48 Policy DefaultPolicy; 49 50 class InterProceduralData; 51 std::unique_ptr<InterProceduralData> IPData; 52 53 enum VisitFlag { NotVisited = 0, Visited = 1, Pending = 2 }; 54 llvm::DenseMap<const FunctionDecl*, VisitFlag> VisitedFD; 55 56 /// \name Statistics 57 /// @{ 58 59 /// Number of function CFGs built and analyzed. 60 unsigned NumFunctionsAnalyzed; 61 62 /// Number of functions for which the CFG could not be successfully 63 /// built. 64 unsigned NumFunctionsWithBadCFGs; 65 66 /// Total number of blocks across all CFGs. 67 unsigned NumCFGBlocks; 68 69 /// Largest number of CFG blocks for a single function analyzed. 70 unsigned MaxCFGBlocksPerFunction; 71 72 /// Total number of CFGs with variables analyzed for uninitialized 73 /// uses. 74 unsigned NumUninitAnalysisFunctions; 75 76 /// Total number of variables analyzed for uninitialized uses. 77 unsigned NumUninitAnalysisVariables; 78 79 /// Max number of variables analyzed for uninitialized uses in a single 80 /// function. 81 unsigned MaxUninitAnalysisVariablesPerFunction; 82 83 /// Total number of block visits during uninitialized use analysis. 84 unsigned NumUninitAnalysisBlockVisits; 85 86 /// Max number of block visits during uninitialized use analysis of 87 /// a single function. 88 unsigned MaxUninitAnalysisBlockVisitsPerFunction; 89 90 /// @} 91 92 public: 93 AnalysisBasedWarnings(Sema &s); 94 ~AnalysisBasedWarnings(); 95 96 void IssueWarnings(Policy P, FunctionScopeInfo *fscope, 97 const Decl *D, QualType BlockType); 98 99 // Issue warnings that require whole-translation-unit analysis. 100 void IssueWarnings(TranslationUnitDecl *D); 101 102 Policy getDefaultPolicy() { return DefaultPolicy; } 103 104 void PrintStats() const; 105 }; 106 107 } // namespace sema 108 } // namespace clang 109 110 #endif 111