114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
//== TraversalChecker.cpp -------------------------------------- -*- 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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// These checkers print various aspects of the ExprEngine's traversal of the CFG
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// as it builds the ExplodedGraph.
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//
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//===----------------------------------------------------------------------===//
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#include "ClangSACheckers.h"
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#include "clang/AST/ParentMap.h"
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#include "clang/AST/StmtObjC.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/CallEvent.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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#include "llvm/Support/raw_ostream.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 TraversalDumper : public Checker< check::BranchCondition,
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check::BeginFunction,
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check::EndFunction > {
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public:
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void checkBranchCondition(const Stmt *Condition, CheckerContext &C) const;
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void checkBeginFunction(CheckerContext &C) const;
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void checkEndFunction(CheckerContext &C) const;
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};
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}
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void TraversalDumper::checkBranchCondition(const Stmt *Condition,
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CheckerContext &C) const {
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// Special-case Objective-C's for-in loop, which uses the entire loop as its
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// condition. We just print the collection expression.
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const Stmt *Parent = dyn_cast<ObjCForCollectionStmt>(Condition);
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if (!Parent) {
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const ParentMap &Parents = C.getLocationContext()->getParentMap();
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Parent = Parents.getParent(Condition);
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}
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// It is mildly evil to print directly to llvm::outs() rather than emitting
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// warnings, but this ensures things do not get filtered out by the rest of
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// the static analyzer machinery.
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SourceLocation Loc = Parent->getLocStart();
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llvm::outs() << C.getSourceManager().getSpellingLineNumber(Loc) << " "
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<< Parent->getStmtClassName() << "\n";
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}
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void TraversalDumper::checkBeginFunction(CheckerContext &C) const {
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llvm::outs() << "--BEGIN FUNCTION--\n";
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}
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void TraversalDumper::checkEndFunction(CheckerContext &C) const {
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llvm::outs() << "--END FUNCTION--\n";
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}
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void ento::registerTraversalDumper(CheckerManager &mgr) {
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mgr.registerChecker<TraversalDumper>();
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}
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//------------------------------------------------------------------------------
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namespace {
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class CallDumper : public Checker< check::PreCall,
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check::PostCall > {
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public:
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void checkPreCall(const CallEvent &Call, CheckerContext &C) const;
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void checkPostCall(const CallEvent &Call, CheckerContext &C) const;
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};
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}
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void CallDumper::checkPreCall(const CallEvent &Call, CheckerContext &C) const {
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unsigned Indentation = 0;
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for (const LocationContext *LC = C.getLocationContext()->getParent();
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LC != nullptr; LC = LC->getParent())
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++Indentation;
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// It is mildly evil to print directly to llvm::outs() rather than emitting
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// warnings, but this ensures things do not get filtered out by the rest of
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// the static analyzer machinery.
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llvm::outs().indent(Indentation);
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Call.dump(llvm::outs());
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}
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void CallDumper::checkPostCall(const CallEvent &Call, CheckerContext &C) const {
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const Expr *CallE = Call.getOriginExpr();
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if (!CallE)
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return;
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unsigned Indentation = 0;
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for (const LocationContext *LC = C.getLocationContext()->getParent();
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LC != nullptr; LC = LC->getParent())
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++Indentation;
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// It is mildly evil to print directly to llvm::outs() rather than emitting
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// warnings, but this ensures things do not get filtered out by the rest of
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// the static analyzer machinery.
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llvm::outs().indent(Indentation);
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if (Call.getResultType()->isVoidType())
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llvm::outs() << "Returning void\n";
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else
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llvm::outs() << "Returning " << C.getSVal(CallE) << "\n";
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}
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void ento::registerCallDumper(CheckerManager &mgr) {
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mgr.registerChecker<CallDumper>();
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}
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