f86615ca5c
1) Create a header file to expose the predefined visitors. And move the parent(BugReporterVisitor) there as well. 2) Remove the registerXXXVisitor functions - the Visitor constructors/getters can be used now to create the object. One exception is registerVarDeclsLastStore(), which registers more then one visitor, so make it static member of FindLastStoreBRVisitor. 3) Modify all the checkers to use the new API. llvm-svn: 138126
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
//===--- UndefinedAssignmentChecker.h ---------------------------*- 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 UndefinedAssignmentChecker, a builtin check in ExprEngine that
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// checks for assigning undefined values.
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//
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//===----------------------------------------------------------------------===//
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#include "ClangSACheckers.h"
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#include "clang/StaticAnalyzer/Core/Checker.h"
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#include "clang/StaticAnalyzer/Core/CheckerManager.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
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using namespace clang;
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using namespace ento;
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namespace {
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class UndefinedAssignmentChecker
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: public Checker<check::Bind> {
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mutable llvm::OwningPtr<BugType> BT;
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public:
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void checkBind(SVal location, SVal val, CheckerContext &C) const;
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};
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}
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void UndefinedAssignmentChecker::checkBind(SVal location, SVal val,
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CheckerContext &C) const {
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if (!val.isUndef())
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return;
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ExplodedNode *N = C.generateSink();
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if (!N)
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return;
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const char *str = "Assigned value is garbage or undefined";
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if (!BT)
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BT.reset(new BuiltinBug(str));
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// Generate a report for this bug.
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const Expr *ex = 0;
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const Stmt *StoreE = C.getStmt();
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while (StoreE) {
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if (const BinaryOperator *B = dyn_cast<BinaryOperator>(StoreE)) {
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if (B->isCompoundAssignmentOp()) {
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const ProgramState *state = C.getState();
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if (state->getSVal(B->getLHS()).isUndef()) {
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str = "The left expression of the compound assignment is an "
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"uninitialized value. The computed value will also be garbage";
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ex = B->getLHS();
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break;
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}
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}
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ex = B->getRHS();
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break;
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}
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if (const DeclStmt *DS = dyn_cast<DeclStmt>(StoreE)) {
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const VarDecl *VD = dyn_cast<VarDecl>(DS->getSingleDecl());
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ex = VD->getInit();
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}
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break;
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}
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BugReport *R = new BugReport(*BT, str, N);
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if (ex) {
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R->addRange(ex->getSourceRange());
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R->addVisitor(bugreporter::getTrackNullOrUndefValueVisitor(N, ex));
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}
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C.EmitReport(R);
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}
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void ento::registerUndefinedAssignmentChecker(CheckerManager &mgr) {
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mgr.registerChecker<UndefinedAssignmentChecker>();
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}
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