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//== TraversalChecker.cpp -------------------------------------- -*- C++ -*--=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This checker prints branch statements to llvm::outs as they are encountered.
// This lets us see exactly how the ExprEngine is traversing the graph.
//
//===----------------------------------------------------------------------===//
#include "ClangSACheckers.h"
#include "clang/AST/ParentMap.h"
#include "clang/AST/StmtObjC.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
using namespace clang;
using namespace ento;
namespace {
class TraversalDumper : public Checker< check::BranchCondition,
check::EndPath > {
public:
void checkBranchCondition(const Stmt *Condition, CheckerContext &C) const;
void checkEndPath(CheckerContext &C) const;
};
}
void TraversalDumper::checkBranchCondition(const Stmt *Condition,
CheckerContext &C) const {
// Special-case Objective-C's for-in loop, which uses the entire loop as its
// condition. We just print the collection expression.
const Stmt *Parent = dyn_cast<ObjCForCollectionStmt>(Condition);
if (!Parent) {
const ParentMap &Parents = C.getLocationContext()->getParentMap();
Parent = Parents.getParent(Condition);
}
// It is mildly evil to print directly to llvm::outs() rather than emitting
// warnings, but this ensures things do not get filtered out by the rest of
// the static analyzer machinery.
SourceLocation Loc = Parent->getLocStart();
llvm::outs() << C.getSourceManager().getSpellingLineNumber(Loc) << " "
<< Parent->getStmtClassName() << "\n";
}
void TraversalDumper::checkEndPath(CheckerContext &C) const {
llvm::outs() << "--END PATH--\n";
}
void ento::registerTraversalDumper(CheckerManager &mgr) {
mgr.registerChecker<TraversalDumper>();
}
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