[analyzer] Rename AttrNonNullChecker -> NonNullParamChecker

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176755 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 190 deletions

diff --git a/lib/StaticAnalyzer/Checkers/AttrNonNullChecker.cpp b/lib/StaticAnalyzer/Checkers/AttrNonNullChecker.cpp
deleted file mode 100644
index d1593419e8..0000000000
--- a/lib/StaticAnalyzer/Checkers/AttrNonNullChecker.cpp
+++ /dev/null
@@ -1,190 +0,0 @@
-//===--- AttrNonNullChecker.h - Undefined arguments checker ----*- C++ -*--===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This defines AttrNonNullChecker, a builtin check in ExprEngine that 
-// performs checks for arguments declared to have nonnull attribute.
-//
-//===----------------------------------------------------------------------===//
-
-#include "ClangSACheckers.h"
-#include "clang/AST/Attr.h"
-#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
-#include "clang/StaticAnalyzer/Core/Checker.h"
-#include "clang/StaticAnalyzer/Core/CheckerManager.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
-
-using namespace clang;
-using namespace ento;
-
-namespace {
-class AttrNonNullChecker
-  : public Checker< check::PreCall > {
-  mutable OwningPtr<BugType> BTAttrNonNull;
-  mutable OwningPtr<BugType> BTNullRefArg;
-public:
-
-  void checkPreCall(const CallEvent &Call, CheckerContext &C) const;
-
-  BugReport *genReportNullAttrNonNull(const ExplodedNode *ErrorN,
-                                      const Expr *ArgE) const;
-  BugReport *genReportReferenceToNullPointer(const ExplodedNode *ErrorN,
-                                             const Expr *ArgE) const;
-};
-} // end anonymous namespace
-
-void AttrNonNullChecker::checkPreCall(const CallEvent &Call,
-                                      CheckerContext &C) const {
-  const Decl *FD = Call.getDecl();
-  if (!FD)
-    return;
-
-  const NonNullAttr *Att = FD->getAttr<NonNullAttr>();
-
-  ProgramStateRef state = C.getState();
-
-  CallEvent::param_type_iterator TyI = Call.param_type_begin(),
-                                 TyE = Call.param_type_end();
-
-  for (unsigned idx = 0, count = Call.getNumArgs(); idx != count; ++idx){
-
-    // Check if the parameter is a reference. We want to report when reference
-    // to a null pointer is passed as a paramter.
-    bool haveRefTypeParam = false;
-    if (TyI != TyE) {
-      haveRefTypeParam = (*TyI)->isReferenceType();
-      TyI++;
-    }
-
-    bool haveAttrNonNull = Att && Att->isNonNull(idx);
-
-    if (!haveRefTypeParam && !haveAttrNonNull)
-      continue;
-
-    // If the value is unknown or undefined, we can't perform this check.
-    const Expr *ArgE = Call.getArgExpr(idx);
-    SVal V = Call.getArgSVal(idx);
-    Optional<DefinedSVal> DV = V.getAs<DefinedSVal>();
-    if (!DV)
-      continue;
-
-    // Process the case when the argument is not a location.
-    assert(!haveRefTypeParam || DV->getAs<Loc>());
-
-    if (haveAttrNonNull && !DV->getAs<Loc>()) {
-      // If the argument is a union type, we want to handle a potential
-      // transparent_union GCC extension.
-      if (!ArgE)
-        continue;
-
-      QualType T = ArgE->getType();
-      const RecordType *UT = T->getAsUnionType();
-      if (!UT || !UT->getDecl()->hasAttr<TransparentUnionAttr>())
-        continue;
-
-      if (Optional<nonloc::CompoundVal> CSV =
-              DV->getAs<nonloc::CompoundVal>()) {
-        nonloc::CompoundVal::iterator CSV_I = CSV->begin();
-        assert(CSV_I != CSV->end());
-        V = *CSV_I;
-        DV = V.getAs<DefinedSVal>();
-        assert(++CSV_I == CSV->end());
-        if (!DV)
-          continue;
-        // Retrieve the corresponding expression.
-        if (const CompoundLiteralExpr *CE = dyn_cast<CompoundLiteralExpr>(ArgE))
-          if (const InitListExpr *IE =
-                dyn_cast<InitListExpr>(CE->getInitializer()))
-             ArgE = dyn_cast<Expr>(*(IE->begin()));
-
-      } else {
-        // FIXME: Handle LazyCompoundVals?
-        continue;
-      }
-    }
-
-    ConstraintManager &CM = C.getConstraintManager();
-    ProgramStateRef stateNotNull, stateNull;
-    llvm::tie(stateNotNull, stateNull) = CM.assumeDual(state, *DV);
-
-    if (stateNull && !stateNotNull) {
-      // Generate an error node.  Check for a null node in case
-      // we cache out.
-      if (ExplodedNode *errorNode = C.generateSink(stateNull)) {
-
-        BugReport *R = 0;
-        if (haveAttrNonNull)
-          R = genReportNullAttrNonNull(errorNode, ArgE);
-        else if (haveRefTypeParam)
-          R = genReportReferenceToNullPointer(errorNode, ArgE);
-
-        // Highlight the range of the argument that was null.
-        R->addRange(Call.getArgSourceRange(idx));
-
-        // Emit the bug report.
-        C.emitReport(R);
-      }
-
-      // Always return.  Either we cached out or we just emitted an error.
-      return;
-    }
-
-    // If a pointer value passed the check we should assume that it is
-    // indeed not null from this point forward.
-    assert(stateNotNull);
-    state = stateNotNull;
-  }
-
-  // If we reach here all of the arguments passed the nonnull check.
-  // If 'state' has been updated generated a new node.
-  C.addTransition(state);
-}
-
-BugReport *AttrNonNullChecker::genReportNullAttrNonNull(
-  const ExplodedNode *ErrorNode, const Expr *ArgE) const {
-  // Lazily allocate the BugType object if it hasn't already been
-  // created. Ownership is transferred to the BugReporter object once
-  // the BugReport is passed to 'EmitWarning'.
-  if (!BTAttrNonNull)
-    BTAttrNonNull.reset(new BugType(
-                            "Argument with 'nonnull' attribute passed null",
-                            "API"));
-
-  BugReport *R = new BugReport(*BTAttrNonNull,
-                  "Null pointer passed as an argument to a 'nonnull' parameter",
-                  ErrorNode);
-  if (ArgE)
-    bugreporter::trackNullOrUndefValue(ErrorNode, ArgE, *R);
-
-  return R;
-}
-
-BugReport *AttrNonNullChecker::genReportReferenceToNullPointer(
-  const ExplodedNode *ErrorNode, const Expr *ArgE) const {
-  if (!BTNullRefArg)
-    BTNullRefArg.reset(new BuiltinBug("Dereference of null pointer"));
-
-  BugReport *R = new BugReport(*BTNullRefArg,
-                               "Forming reference to null pointer",
-                               ErrorNode);
-  if (ArgE) {
-    const Expr *ArgEDeref = bugreporter::getDerefExpr(ArgE);
-    if (ArgEDeref == 0)
-      ArgEDeref = ArgE;
-    bugreporter::trackNullOrUndefValue(ErrorNode,
-                                       ArgEDeref,
-                                       *R);
-  }
-  return R;
-
-}
-
-void ento::registerAttrNonNullChecker(CheckerManager &mgr) {
-  mgr.registerChecker<AttrNonNullChecker>();
-}