Current Path : /compat/linux/proc/68247/root/usr/src/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //compat/linux/proc/68247/root/usr/src/contrib/llvm/tools/clang/lib/StaticAnalyzer/Checkers/FixedAddressChecker.cpp |
//=== FixedAddressChecker.cpp - Fixed address usage checker ----*- C++ -*--===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This files defines FixedAddressChecker, a builtin checker that checks for // assignment of a fixed address to a pointer. // This check corresponds to CWE-587. // //===----------------------------------------------------------------------===// #include "ClangSACheckers.h" #include "clang/StaticAnalyzer/Core/Checker.h" #include "clang/StaticAnalyzer/Core/CheckerManager.h" #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" using namespace clang; using namespace ento; namespace { class FixedAddressChecker : public Checker< check::PreStmt<BinaryOperator> > { mutable OwningPtr<BuiltinBug> BT; public: void checkPreStmt(const BinaryOperator *B, CheckerContext &C) const; }; } void FixedAddressChecker::checkPreStmt(const BinaryOperator *B, CheckerContext &C) const { // Using a fixed address is not portable because that address will probably // not be valid in all environments or platforms. if (B->getOpcode() != BO_Assign) return; QualType T = B->getType(); if (!T->isPointerType()) return; ProgramStateRef state = C.getState(); SVal RV = state->getSVal(B->getRHS(), C.getLocationContext()); if (!RV.isConstant() || RV.isZeroConstant()) return; if (ExplodedNode *N = C.addTransition()) { if (!BT) BT.reset(new BuiltinBug("Use fixed address", "Using a fixed address is not portable because that " "address will probably not be valid in all " "environments or platforms.")); BugReport *R = new BugReport(*BT, BT->getDescription(), N); R->addRange(B->getRHS()->getSourceRange()); C.EmitReport(R); } } void ento::registerFixedAddressChecker(CheckerManager &mgr) { mgr.registerChecker<FixedAddressChecker>(); }