1 //==- DynamicTypeMap.cpp - Dynamic Type Info related APIs ----------*- 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 APIs that track and query dynamic type information. This 11 // information can be used to devirtualize calls during the symbolic exection 12 // or do type checking. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "clang/StaticAnalyzer/Core/PathSensitive/DynamicTypeMap.h" 17 18 namespace clang { 19 namespace ento { 20 21 DynamicTypeInfo getDynamicTypeInfo(ProgramStateRef State, 22 const MemRegion *Reg) { 23 Reg = Reg->StripCasts(); 24 25 // Look up the dynamic type in the GDM. 26 const DynamicTypeInfo *GDMType = State->get<DynamicTypeMap>(Reg); 27 if (GDMType) 28 return *GDMType; 29 30 // Otherwise, fall back to what we know about the region. 31 if (const TypedRegion *TR = dyn_cast<TypedRegion>(Reg)) 32 return DynamicTypeInfo(TR->getLocationType(), /*CanBeSubclass=*/false); 33 34 if (const SymbolicRegion *SR = dyn_cast<SymbolicRegion>(Reg)) { 35 SymbolRef Sym = SR->getSymbol(); 36 return DynamicTypeInfo(Sym->getType()); 37 } 38 39 return DynamicTypeInfo(); 40 } 41 42 ProgramStateRef setDynamicTypeInfo(ProgramStateRef State, const MemRegion *Reg, 43 DynamicTypeInfo NewTy) { 44 Reg = Reg->StripCasts(); 45 ProgramStateRef NewState = State->set<DynamicTypeMap>(Reg, NewTy); 46 assert(NewState); 47 return NewState; 48 } 49 50 } // namespace ento 51 } // namespace clang 52
