diff options
| author | Ted Kremenek <kremenek@apple.com> | 2010-12-23 19:38:26 +0000 |
|---|---|---|
| committer | Ted Kremenek <kremenek@apple.com> | 2010-12-23 19:38:26 +0000 |
| commit | 21142581d55918beed544a757e4af3bb865b1812 (patch) | |
| tree | c630a6cf82f6953372f1ea8f700d0d0a9372472c /lib/EntoSA/Checkers/PointerArithChecker.cpp | |
| parent | fd03843f0597de5eeced69ca9ae45c478fb2b153 (diff) | |
Chris Lattner has strong opinions about directory
layout. :)
Rename the 'EntoSA' directories to 'StaticAnalyzer'.
Internally we will still use the 'ento' namespace
for the analyzer engine (unless there are further
sabre rattlings...).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122514 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/EntoSA/Checkers/PointerArithChecker.cpp')
| -rw-r--r-- | lib/EntoSA/Checkers/PointerArithChecker.cpp | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/lib/EntoSA/Checkers/PointerArithChecker.cpp b/lib/EntoSA/Checkers/PointerArithChecker.cpp deleted file mode 100644 index 30009a2560..0000000000 --- a/lib/EntoSA/Checkers/PointerArithChecker.cpp +++ /dev/null @@ -1,72 +0,0 @@ -//=== PointerArithChecker.cpp - Pointer arithmetic 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 PointerArithChecker, a builtin checker that checks for -// pointer arithmetic on locations other than array elements. -// -//===----------------------------------------------------------------------===// - -#include "ExprEngineInternalChecks.h" -#include "clang/EntoSA/BugReporter/BugType.h" -#include "clang/EntoSA/PathSensitive/CheckerVisitor.h" - -using namespace clang; -using namespace ento; - -namespace { -class PointerArithChecker - : public CheckerVisitor<PointerArithChecker> { - BuiltinBug *BT; -public: - PointerArithChecker() : BT(0) {} - static void *getTag(); - void PreVisitBinaryOperator(CheckerContext &C, const BinaryOperator *B); -}; -} - -void *PointerArithChecker::getTag() { - static int x; - return &x; -} - -void PointerArithChecker::PreVisitBinaryOperator(CheckerContext &C, - const BinaryOperator *B) { - if (B->getOpcode() != BO_Sub && B->getOpcode() != BO_Add) - return; - - const GRState *state = C.getState(); - SVal LV = state->getSVal(B->getLHS()); - SVal RV = state->getSVal(B->getRHS()); - - const MemRegion *LR = LV.getAsRegion(); - - if (!LR || !RV.isConstant()) - return; - - // If pointer arithmetic is done on variables of non-array type, this often - // means behavior rely on memory organization, which is dangerous. - if (isa<VarRegion>(LR) || isa<CodeTextRegion>(LR) || - isa<CompoundLiteralRegion>(LR)) { - - if (ExplodedNode *N = C.generateNode()) { - if (!BT) - BT = new BuiltinBug("Dangerous pointer arithmetic", - "Pointer arithmetic done on non-array variables " - "means reliance on memory layout, which is " - "dangerous."); - RangedBugReport *R = new RangedBugReport(*BT, BT->getDescription(), N); - R->addRange(B->getSourceRange()); - C.EmitReport(R); - } - } -} - -void ento::RegisterPointerArithChecker(ExprEngine &Eng) { - Eng.registerCheck(new PointerArithChecker()); -} |
