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 "llvm/ADT/DenseMap.h" 17 18 namespace clang { 19 20 class BlockExpr; 21 class Decl; 22 class FunctionDecl; 23 class ObjCMethodDecl; 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 enum VisitFlag { NotVisited = 0, Visited = 1, Pending = 2 }; 51 llvm::DenseMap<const FunctionDecl*, VisitFlag> VisitedFD; 52 53 /// \name Statistics 54 /// @{ 55 56 /// Number of function CFGs built and analyzed. 57 unsigned NumFunctionsAnalyzed; 58 59 /// Number of functions for which the CFG could not be successfully 60 /// built. 61 unsigned NumFunctionsWithBadCFGs; 62 63 /// Total number of blocks across all CFGs. 64 unsigned NumCFGBlocks; 65 66 /// Largest number of CFG blocks for a single function analyzed. 67 unsigned MaxCFGBlocksPerFunction; 68 69 /// Total number of CFGs with variables analyzed for uninitialized 70 /// uses. 71 unsigned NumUninitAnalysisFunctions; 72 73 /// Total number of variables analyzed for uninitialized uses. 74 unsigned NumUninitAnalysisVariables; 75 76 /// Max number of variables analyzed for uninitialized uses in a single 77 /// function. 78 unsigned MaxUninitAnalysisVariablesPerFunction; 79 80 /// Total number of block visits during uninitialized use analysis. 81 unsigned NumUninitAnalysisBlockVisits; 82 83 /// 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, QualType BlockType); 94 95 Policy getDefaultPolicy() { return DefaultPolicy; } 96 97 void PrintStats() const; 98 }; 99 100 }} // end namespace clang::sema 101 102 #endif 103