1 //===---- CheckerHelpers.cpp - Helper functions for checkers ----*- 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 several static functions for use in checkers. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerHelpers.h" 15 #include "clang/AST/Expr.h" 16 17 // Recursively find any substatements containing macros 18 bool clang::ento::containsMacro(const Stmt *S) { 19 if (S->getLocStart().isMacroID()) 20 return true; 21 22 if (S->getLocEnd().isMacroID()) 23 return true; 24 25 for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end(); 26 ++I) 27 if (const Stmt *child = *I) 28 if (containsMacro(child)) 29 return true; 30 31 return false; 32 } 33 34 // Recursively find any substatements containing enum constants 35 bool clang::ento::containsEnum(const Stmt *S) { 36 const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(S); 37 38 if (DR && isa<EnumConstantDecl>(DR->getDecl())) 39 return true; 40 41 for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end(); 42 ++I) 43 if (const Stmt *child = *I) 44 if (containsEnum(child)) 45 return true; 46 47 return false; 48 } 49 50 // Recursively find any substatements containing static vars 51 bool clang::ento::containsStaticLocal(const Stmt *S) { 52 const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(S); 53 54 if (DR) 55 if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl())) 56 if (VD->isStaticLocal()) 57 return true; 58 59 for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end(); 60 ++I) 61 if (const Stmt *child = *I) 62 if (containsStaticLocal(child)) 63 return true; 64 65 return false; 66 } 67 68 // Recursively find any substatements containing __builtin_offsetof 69 bool clang::ento::containsBuiltinOffsetOf(const Stmt *S) { 70 if (isa<OffsetOfExpr>(S)) 71 return true; 72 73 for (Stmt::const_child_iterator I = S->child_begin(); I != S->child_end(); 74 ++I) 75 if (const Stmt *child = *I) 76 if (containsBuiltinOffsetOf(child)) 77 return true; 78 79 return false; 80 } 81
