forked from OSchip/llvm-project
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
//===--- UndefinedArgChecker.h - Undefined arguments checker ----*- C++ -*--==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This defines BadCallChecker, a builtin check in GRExprEngine that performs
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// checks for undefined arguments.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Analysis/PathSensitive/CheckerVisitor.h"
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#include "clang/Analysis/PathSensitive/BugReporter.h"
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#include "GRExprEngineInternalChecks.h"
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using namespace clang;
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namespace {
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class VISIBILITY_HIDDEN UndefinedArgChecker
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: public CheckerVisitor<UndefinedArgChecker> {
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BugType *BT;
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public:
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UndefinedArgChecker() : BT(0) {}
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static void *getTag() {
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static int x = 0;
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return &x;
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}
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void PreVisitCallExpr(CheckerContext &C, const CallExpr *CE);
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};
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} // end anonymous namespace
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void clang::RegisterUndefinedArgChecker(GRExprEngine &Eng) {
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Eng.registerCheck(new UndefinedArgChecker());
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}
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void UndefinedArgChecker::PreVisitCallExpr(CheckerContext &C,
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const CallExpr *CE){
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for (CallExpr::const_arg_iterator I = CE->arg_begin(), E = CE->arg_end();
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I != E; ++I) {
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if (C.getState()->getSVal(*I).isUndef()) {
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if (ExplodedNode *N = C.GenerateNode(CE, true)) {
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if (!BT)
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BT = new BuiltinBug("Pass-by-value argument in function call is "
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"undefined");
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// Generate a report for this bug.
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EnhancedBugReport *R = new EnhancedBugReport(*BT, BT->getName(), N);
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R->addRange((*I)->getSourceRange());
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R->addVisitorCreator(bugreporter::registerTrackNullOrUndefValue, *I);
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C.EmitReport(R);
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}
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}
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}
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}
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