1 //== CheckerContext.cpp - Context info for path-sensitive checkers-----------=//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines CheckerContext that provides contextual info for
11 // path-sensitive checkers.
13 //===----------------------------------------------------------------------===//
15 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
16 #include "clang/Basic/Builtins.h"
17 #include "clang/Lex/Lexer.h"
19 using namespace clang;
22 const FunctionDecl *CheckerContext::getCalleeDecl(const CallExpr *CE) const {
23 ProgramStateRef State = getState();
24 const Expr *Callee = CE->getCallee();
25 SVal L = State->getSVal(Callee, Pred->getLocationContext());
26 return L.getAsFunctionDecl();
29 StringRef CheckerContext::getCalleeName(const FunctionDecl *FunDecl) const {
32 IdentifierInfo *funI = FunDecl->getIdentifier();
35 return funI->getName();
39 bool CheckerContext::isCLibraryFunction(const FunctionDecl *FD,
41 return isCLibraryFunction(FD, Name, getASTContext());
44 bool CheckerContext::isCLibraryFunction(const FunctionDecl *FD,
45 StringRef Name, ASTContext &Context) {
46 // To avoid false positives (Ex: finding user defined functions with
47 // similar names), only perform fuzzy name matching when it's a builtin.
48 // Using a string compare is slow, we might want to switch on BuiltinID here.
49 unsigned BId = FD->getBuiltinID();
51 StringRef BName = Context.BuiltinInfo.GetName(BId);
52 if (BName.find(Name) != StringRef::npos)
56 const IdentifierInfo *II = FD->getIdentifier();
57 // If this is a special C++ name without IdentifierInfo, it can't be a
58 // C library function.
62 StringRef FName = II->getName();
63 if (FName.equals(Name))
66 if (FName.startswith("__inline") && (FName.find(Name) != StringRef::npos))
69 if (FName.startswith("__") && FName.endswith("_chk") &&
70 FName.find(Name) != StringRef::npos)
76 StringRef CheckerContext::getMacroNameOrSpelling(SourceLocation &Loc) {
78 return Lexer::getImmediateMacroName(Loc, getSourceManager(),
80 SmallVector<char, 16> buf;
81 return Lexer::getSpelling(Loc, buf, getSourceManager(), getLangOpts());