1 //=- AnalysisBasedWarnings.h - Sema warnings based on libAnalysis -*- C++ -*-=// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines AnalysisBasedWarnings, a worker object used by Sema 11 // that issues warnings based on dataflow-analysis. 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CLANG_SEMA_ANALYSIS_WARNINGS_H 15 #define LLVM_CLANG_SEMA_ANALYSIS_WARNINGS_H 16 17 #include "llvm/ADT/DenseMap.h" 18 19 namespace clang { 20 21 class BlockExpr; 22 class Decl; 23 class FunctionDecl; 24 class ObjCMethodDecl; 25 class QualType; 26 class Sema; 27 namespace sema { 28 class FunctionScopeInfo; 29 } 30 31 namespace sema { 32 33 class AnalysisBasedWarnings { 34 public: 35 class Policy { 36 friend class AnalysisBasedWarnings; 37 // The warnings to run. 38 unsigned enableCheckFallThrough : 1; 39 unsigned enableCheckUnreachable : 1; 40 unsigned enableThreadSafetyAnalysis : 1; 41 public: 42 Policy(); disableCheckFallThrough()43 void disableCheckFallThrough() { enableCheckFallThrough = 0; } 44 }; 45 46 private: 47 Sema &S; 48 Policy DefaultPolicy; 49 50 enum VisitFlag { NotVisited = 0, Visited = 1, Pending = 2 }; 51 llvm::DenseMap<const FunctionDecl*, VisitFlag> VisitedFD; 52 53 /// \name Statistics 54 /// @{ 55 56 /// \brief Number of function CFGs built and analyzed. 57 unsigned NumFunctionsAnalyzed; 58 59 /// \brief Number of functions for which the CFG could not be successfully 60 /// built. 61 unsigned NumFunctionsWithBadCFGs; 62 63 /// \brief Total number of blocks across all CFGs. 64 unsigned NumCFGBlocks; 65 66 /// \brief Largest number of CFG blocks for a single function analyzed. 67 unsigned MaxCFGBlocksPerFunction; 68 69 /// \brief Total number of CFGs with variables analyzed for uninitialized 70 /// uses. 71 unsigned NumUninitAnalysisFunctions; 72 73 /// \brief Total number of variables analyzed for uninitialized uses. 74 unsigned NumUninitAnalysisVariables; 75 76 /// \brief Max number of variables analyzed for uninitialized uses in a single 77 /// function. 78 unsigned MaxUninitAnalysisVariablesPerFunction; 79 80 /// \brief Total number of block visits during uninitialized use analysis. 81 unsigned NumUninitAnalysisBlockVisits; 82 83 /// \brief Max number of block visits during uninitialized use analysis of 84 /// a single function. 85 unsigned MaxUninitAnalysisBlockVisitsPerFunction; 86 87 /// @} 88 89 public: 90 AnalysisBasedWarnings(Sema &s); 91 92 void IssueWarnings(Policy P, FunctionScopeInfo *fscope, 93 const Decl *D, const BlockExpr *blkExpr); 94 getDefaultPolicy()95 Policy getDefaultPolicy() { return DefaultPolicy; } 96 97 void PrintStats() const; 98 }; 99 100 }} // end namespace clang::sema 101 102 #endif 103