CheckerContext.cpp revision 3026348bd4c13a0f83b59839f64065e0fcbea253
18687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks//== CheckerContext.cpp - Context info for path-sensitive checkers-----------=// 28687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// 38687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// The LLVM Compiler Infrastructure 48687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// 58687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// This file is distributed under the University of Illinois Open Source 68687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// License. See LICENSE.TXT for details. 78687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// 88687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks//===----------------------------------------------------------------------===// 98687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// 108687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// This file defines CheckerContext that provides contextual info for 118687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// path-sensitive checkers. 128687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks// 138687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks//===----------------------------------------------------------------------===// 148687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks 158687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" 169b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks#include "clang/Basic/Builtins.h" 17461af1e502c9bd88330bbf17d449a7593fc0d624Anna Zaks#include "clang/Lex/Lexer.h" 189b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks 198687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaksusing namespace clang; 208687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaksusing namespace ento; 218687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks 22b805c8ff133ef0c62df032fa711d6b13c5afd7f4Anna Zaksconst FunctionDecl *CheckerContext::getCalleeDecl(const CallExpr *CE) const { 238687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks const ProgramState *State = getState(); 248687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks const Expr *Callee = CE->getCallee(); 255eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek SVal L = State->getSVal(Callee, Pred->getLocationContext()); 26b805c8ff133ef0c62df032fa711d6b13c5afd7f4Anna Zaks return L.getAsFunctionDecl(); 27b805c8ff133ef0c62df032fa711d6b13c5afd7f4Anna Zaks} 288687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks 299b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna ZaksStringRef CheckerContext::getCalleeName(const FunctionDecl *FunDecl) const { 309b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks if (!FunDecl) 318687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks return StringRef(); 329b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks IdentifierInfo *funI = FunDecl->getIdentifier(); 338687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks if (!funI) 348687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks return StringRef(); 358687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks return funI->getName(); 368687397a0f5e4c31632959d907f9d9b38d793b1cAnna Zaks} 379b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks 389b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks 399b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaksbool CheckerContext::isCLibraryFunction(const FunctionDecl *FD, 409b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks StringRef Name){ 419b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks // To avoid false positives (Ex: finding user defined functions with 429b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks // similar names), only perform fuzzy name matching when it's a builtin. 439b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks // Using a string compare is slow, we might want to switch on BuiltinID here. 449b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks unsigned BId = FD->getBuiltinID(); 459b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks if (BId != 0) { 469b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks ASTContext &Context = getASTContext(); 479b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks StringRef BName = Context.BuiltinInfo.GetName(BId); 489b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks if (StringRef(BName).find(Name) != StringRef::npos) 499b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks return true; 509b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks } 519b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks 529b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks if (FD->isExternC() && FD->getIdentifier()->getName().equals(Name)) 539b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks return true; 549b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks 559b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks return false; 569b0c749a20d0f7d0e63441d76baa15def3f37fdbAnna Zaks} 57461af1e502c9bd88330bbf17d449a7593fc0d624Anna Zaks 58461af1e502c9bd88330bbf17d449a7593fc0d624Anna ZaksStringRef CheckerContext::getMacroNameOrSpelling(SourceLocation &Loc) { 593026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie if (Loc.isMacroID()) 60461af1e502c9bd88330bbf17d449a7593fc0d624Anna Zaks return Lexer::getImmediateMacroName(Loc, getSourceManager(), 61461af1e502c9bd88330bbf17d449a7593fc0d624Anna Zaks getLangOptions()); 623026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie SmallVector<char, 16> buf; 633026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie return Lexer::getSpelling(Loc, buf, getSourceManager(), getLangOptions()); 64461af1e502c9bd88330bbf17d449a7593fc0d624Anna Zaks} 65461af1e502c9bd88330bbf17d449a7593fc0d624Anna Zaks 66