diff options
Diffstat (limited to 'clang/lib/Checker/AdjustedReturnValueChecker.cpp')
| -rw-r--r-- | clang/lib/Checker/AdjustedReturnValueChecker.cpp | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/clang/lib/Checker/AdjustedReturnValueChecker.cpp b/clang/lib/Checker/AdjustedReturnValueChecker.cpp deleted file mode 100644 index 281d74f926c..00000000000 --- a/clang/lib/Checker/AdjustedReturnValueChecker.cpp +++ /dev/null @@ -1,95 +0,0 @@ -//== AdjustedReturnValueChecker.cpp -----------------------------*- C++ -*--==// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file defines AdjustedReturnValueChecker, a simple check to see if the -// return value of a function call is different than the one the caller thinks -// it is. -// -//===----------------------------------------------------------------------===// - -#include "GRExprEngineInternalChecks.h" -#include "clang/GR/BugReporter/BugReporter.h" -#include "clang/GR/PathSensitive/GRExprEngine.h" -#include "clang/GR/PathSensitive/CheckerVisitor.h" - -using namespace clang; - -namespace { -class AdjustedReturnValueChecker : - public CheckerVisitor<AdjustedReturnValueChecker> { -public: - AdjustedReturnValueChecker() {} - - void PostVisitCallExpr(CheckerContext &C, const CallExpr *CE); - - static void *getTag() { - static int x = 0; return &x; - } -}; -} - -void clang::RegisterAdjustedReturnValueChecker(GRExprEngine &Eng) { - Eng.registerCheck(new AdjustedReturnValueChecker()); -} - -void AdjustedReturnValueChecker::PostVisitCallExpr(CheckerContext &C, - const CallExpr *CE) { - - // Get the result type of the call. - QualType expectedResultTy = CE->getType(); - - // Fetch the signature of the called function. - const GRState *state = C.getState(); - - SVal V = state->getSVal(CE); - - if (V.isUnknown()) - return; - - // Casting to void? Discard the value. - if (expectedResultTy->isVoidType()) { - C.generateNode(state->BindExpr(CE, UnknownVal())); - return; - } - - const MemRegion *callee = state->getSVal(CE->getCallee()).getAsRegion(); - if (!callee) - return; - - QualType actualResultTy; - - if (const FunctionTextRegion *FT = dyn_cast<FunctionTextRegion>(callee)) { - const FunctionDecl *FD = FT->getDecl(); - actualResultTy = FD->getResultType(); - } - else if (const BlockDataRegion *BD = dyn_cast<BlockDataRegion>(callee)) { - const BlockTextRegion *BR = BD->getCodeRegion(); - const BlockPointerType *BT=BR->getLocationType()->getAs<BlockPointerType>(); - const FunctionType *FT = BT->getPointeeType()->getAs<FunctionType>(); - actualResultTy = FT->getResultType(); - } - - // Can this happen? - if (actualResultTy.isNull()) - return; - - // For now, ignore references. - if (actualResultTy->getAs<ReferenceType>()) - return; - - - // Are they the same? - if (expectedResultTy != actualResultTy) { - // FIXME: Do more checking and actual emit an error. At least performing - // the cast avoids some assertion failures elsewhere. - SValBuilder &svalBuilder = C.getSValBuilder(); - V = svalBuilder.evalCast(V, expectedResultTy, actualResultTy); - C.generateNode(state->BindExpr(CE, V)); - } -} |

