lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp - platform/external/clang - Git at Google

 //===--- AnalysisConsumer.cpp - ASTConsumer for running Analyses ----------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // "Meta" ASTConsumer for running different source analyses.
 //
 //===----------------------------------------------------------------------===//

 #include "AnalysisConsumer.h"
 #include "clang/AST/ASTConsumer.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/ParentMap.h"
 #include "clang/Analysis/CFG.h"
 #include "clang/StaticAnalyzer/Frontend/CheckerRegistration.h"
 #include "clang/StaticAnalyzer/Core/CheckerManager.h"
 #include "clang/StaticAnalyzer/Checkers/LocalCheckers.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
 #include "clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h"

 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Frontend/AnalyzerOptions.h"
 #include "clang/Lex/Preprocessor.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/Program.h"
 #include "llvm/ADT/OwningPtr.h"

 using namespace clang;
 using namespace ento;

 static ExplodedNode::Auditor* CreateUbiViz();

 //===----------------------------------------------------------------------===//
 // Special PathDiagnosticConsumers.
 //===----------------------------------------------------------------------===//

 static PathDiagnosticConsumer*
 createPlistHTMLDiagnosticConsumer(const std::string& prefix,
                                 const Preprocessor &PP) {
   PathDiagnosticConsumer *PD =
     createHTMLDiagnosticConsumer(llvm::sys::path::parent_path(prefix), PP);
   return createPlistDiagnosticConsumer(prefix, PP, PD);
 }

 //===----------------------------------------------------------------------===//
 // AnalysisConsumer declaration.
 //===----------------------------------------------------------------------===//

 namespace {

 class AnalysisConsumer : public ASTConsumer {
 public:
   ASTContext *Ctx;
   const Preprocessor &PP;
   const std::string OutDir;
   AnalyzerOptions Opts;
   ArrayRef<std::string> Plugins;

   // PD is owned by AnalysisManager.
   PathDiagnosticConsumer *PD;

   StoreManagerCreator CreateStoreMgr;
   ConstraintManagerCreator CreateConstraintMgr;

   llvm::OwningPtr<CheckerManager> checkerMgr;
   llvm::OwningPtr<AnalysisManager> Mgr;

   AnalysisConsumer(const Preprocessor& pp,
                    const std::string& outdir,
                    const AnalyzerOptions& opts,
                    ArrayRef<std::string> plugins)
     : Ctx(0), PP(pp), OutDir(outdir), Opts(opts), Plugins(plugins), PD(0) {
     DigestAnalyzerOptions();
   }

   void DigestAnalyzerOptions() {
     // Create the PathDiagnosticConsumer.
     if (!OutDir.empty()) {
       switch (Opts.AnalysisDiagOpt) {
       default:
 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATEFN, AUTOCREATE) \
         case PD_##NAME: PD = CREATEFN(OutDir, PP); break;
 #include "clang/Frontend/Analyses.def"
       }
     } else if (Opts.AnalysisDiagOpt == PD_TEXT) {
       // Create the text client even without a specified output file since
       // it just uses diagnostic notes.
       PD = createTextPathDiagnosticConsumer("", PP);
     }

     // Create the analyzer component creators.
     switch (Opts.AnalysisStoreOpt) {
     default:
       llvm_unreachable("Unknown store manager.");
 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATEFN)           \
       case NAME##Model: CreateStoreMgr = CREATEFN; break;
 #include "clang/Frontend/Analyses.def"
     }

     switch (Opts.AnalysisConstraintsOpt) {
     default:
       llvm_unreachable("Unknown store manager.");
 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATEFN)     \
       case NAME##Model: CreateConstraintMgr = CREATEFN; break;
 #include "clang/Frontend/Analyses.def"
     }
   }

   void DisplayFunction(const Decl *D) {
     if (!Opts.AnalyzerDisplayProgress)
       return;

     SourceManager &SM = Mgr->getASTContext().getSourceManager();
     PresumedLoc Loc = SM.getPresumedLoc(D->getLocation());
     if (Loc.isValid()) {
       llvm::errs() << "ANALYZE: " << Loc.getFilename();

       if (isa<FunctionDecl>(D) || isa<ObjCMethodDecl>(D)) {
         const NamedDecl *ND = cast<NamedDecl>(D);
         llvm::errs() << ' ' << *ND << '\n';
       }
       else if (isa<BlockDecl>(D)) {
         llvm::errs() << ' ' << "block(line:" << Loc.getLine() << ",col:"
                      << Loc.getColumn() << '\n';
       }
       else if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
         Selector S = MD->getSelector();
         llvm::errs() << ' ' << S.getAsString();
       }
     }
   }

   virtual void Initialize(ASTContext &Context) {
     Ctx = &Context;
     checkerMgr.reset(createCheckerManager(Opts, PP.getLangOptions(), Plugins,
                                           PP.getDiagnostics()));
     Mgr.reset(new AnalysisManager(*Ctx, PP.getDiagnostics(),
                                   PP.getLangOptions(), PD,
                                   CreateStoreMgr, CreateConstraintMgr,
                                   checkerMgr.get(),
                                   /* Indexer */ 0,
                                   Opts.MaxNodes, Opts.MaxLoop,
                                   Opts.VisualizeEGDot, Opts.VisualizeEGUbi,
                                   Opts.AnalysisPurgeOpt, Opts.EagerlyAssume,
                                   Opts.TrimGraph, Opts.InlineCall,
                                   Opts.UnoptimizedCFG, Opts.CFGAddImplicitDtors,
                                   Opts.CFGAddInitializers,
                                   Opts.EagerlyTrimEGraph));
   }

   virtual void HandleTranslationUnit(ASTContext &C);
   void HandleDeclContext(ASTContext &C, DeclContext *dc);
   void HandleDeclContextDecl(ASTContext &C, Decl *D);

   void HandleCode(Decl *D);
 };
 } // end anonymous namespace

 //===----------------------------------------------------------------------===//
 // AnalysisConsumer implementation.
 //===----------------------------------------------------------------------===//

 void AnalysisConsumer::HandleDeclContext(ASTContext &C, DeclContext *dc) {
   for (DeclContext::decl_iterator I = dc->decls_begin(), E = dc->decls_end();
        I != E; ++I) {
     HandleDeclContextDecl(C, *I);
   }
 }

 void AnalysisConsumer::HandleDeclContextDecl(ASTContext &C, Decl *D) {
   { // Handle callbacks for arbitrary decls.
     BugReporter BR(*Mgr);
     checkerMgr->runCheckersOnASTDecl(D, *Mgr, BR);
   }

   switch (D->getKind()) {
     case Decl::Namespace: {
       HandleDeclContext(C, cast<NamespaceDecl>(D));
       break;
     }
     case Decl::CXXConstructor:
     case Decl::CXXDestructor:
     case Decl::CXXConversion:
     case Decl::CXXMethod:
     case Decl::Function: {
       FunctionDecl *FD = cast<FunctionDecl>(D);
       // We skip function template definitions, as their semantics is
       // only determined when they are instantiated.
       if (FD->isThisDeclarationADefinition() &&
           !FD->isDependentContext()) {
         if (!Opts.AnalyzeSpecificFunction.empty() &&
             FD->getDeclName().getAsString() != Opts.AnalyzeSpecificFunction)
           break;
         DisplayFunction(FD);
         HandleCode(FD);
       }
       break;
     }

     case Decl::ObjCCategoryImpl:
     case Decl::ObjCImplementation: {
       ObjCImplDecl *ID = cast<ObjCImplDecl>(D);
       HandleCode(ID);

       for (ObjCContainerDecl::method_iterator MI = ID->meth_begin(),
            ME = ID->meth_end(); MI != ME; ++MI) {
         BugReporter BR(*Mgr);
         checkerMgr->runCheckersOnASTDecl(*MI, *Mgr, BR);

         if ((*MI)->isThisDeclarationADefinition()) {
           if (!Opts.AnalyzeSpecificFunction.empty() &&
               Opts.AnalyzeSpecificFunction !=
                 (*MI)->getSelector().getAsString())
             continue;
           DisplayFunction(*MI);
           HandleCode(*MI);
         }
       }
       break;
     }

     default:
       break;
   }
 }

 void AnalysisConsumer::HandleTranslationUnit(ASTContext &C) {
   {
     // Introduce a scope to destroy BR before Mgr.
     BugReporter BR(*Mgr);
     TranslationUnitDecl *TU = C.getTranslationUnitDecl();
     checkerMgr->runCheckersOnASTDecl(TU, *Mgr, BR);
     HandleDeclContext(C, TU);

     // After all decls handled, run checkers on the entire TranslationUnit.
     checkerMgr->runCheckersOnEndOfTranslationUnit(TU, *Mgr, BR);
   }

   // Explicitly destroy the PathDiagnosticConsumer.  This will flush its output.
   // FIXME: This should be replaced with something that doesn't rely on
   // side-effects in PathDiagnosticConsumer's destructor. This is required when
   // used with option -disable-free.
   Mgr.reset(NULL);
 }

 static void FindBlocks(DeclContext *D, SmallVectorImpl<Decl*> &WL) {
   if (BlockDecl *BD = dyn_cast<BlockDecl>(D))
     WL.push_back(BD);

   for (DeclContext::decl_iterator I = D->decls_begin(), E = D->decls_end();
        I!=E; ++I)
     if (DeclContext *DC = dyn_cast<DeclContext>(*I))
       FindBlocks(DC, WL);
 }

 static void RunPathSensitiveChecks(AnalysisConsumer &C, AnalysisManager &mgr,
                                    Decl *D);

 void AnalysisConsumer::HandleCode(Decl *D) {

   // Don't run the actions if an error has occurred with parsing the file.
   DiagnosticsEngine &Diags = PP.getDiagnostics();
   if (Diags.hasErrorOccurred() || Diags.hasFatalErrorOccurred())
     return;

   // Don't run the actions on declarations in header files unless
   // otherwise specified.
   SourceManager &SM = Ctx->getSourceManager();
   SourceLocation SL = SM.getExpansionLoc(D->getLocation());
   if (!Opts.AnalyzeAll && !SM.isFromMainFile(SL))
     return;

   // Clear the AnalysisManager of old AnalysisDeclContexts.
   Mgr->ClearContexts();

   // Dispatch on the actions.
   SmallVector<Decl*, 10> WL;
   WL.push_back(D);

   if (D->hasBody() && Opts.AnalyzeNestedBlocks)
     FindBlocks(cast<DeclContext>(D), WL);

   BugReporter BR(*Mgr);
   for (SmallVectorImpl<Decl*>::iterator WI=WL.begin(), WE=WL.end();
        WI != WE; ++WI)
     if ((*WI)->hasBody()) {
       checkerMgr->runCheckersOnASTBody(*WI, *Mgr, BR);
       if (checkerMgr->hasPathSensitiveCheckers())
         RunPathSensitiveChecks(*this, *Mgr, *WI);
     }
 }

 //===----------------------------------------------------------------------===//
 // Path-sensitive checking.
 //===----------------------------------------------------------------------===//

 static void ActionExprEngine(AnalysisConsumer &C, AnalysisManager &mgr,
                              Decl *D, bool ObjCGCEnabled) {
   // Construct the analysis engine.  First check if the CFG is valid.
   // FIXME: Inter-procedural analysis will need to handle invalid CFGs.
   if (!mgr.getCFG(D))
     return;
   ExprEngine Eng(mgr, ObjCGCEnabled);

   // Set the graph auditor.
   llvm::OwningPtr<ExplodedNode::Auditor> Auditor;
   if (mgr.shouldVisualizeUbigraph()) {
     Auditor.reset(CreateUbiViz());
     ExplodedNode::SetAuditor(Auditor.get());
   }

   // Execute the worklist algorithm.
   Eng.ExecuteWorkList(mgr.getAnalysisDeclContextManager().getStackFrame(D, 0),
                       mgr.getMaxNodes());

   // Release the auditor (if any) so that it doesn't monitor the graph
   // created BugReporter.
   ExplodedNode::SetAuditor(0);

   // Visualize the exploded graph.
   if (mgr.shouldVisualizeGraphviz())
     Eng.ViewGraph(mgr.shouldTrimGraph());

   // Display warnings.
   Eng.getBugReporter().FlushReports();
 }

 static void RunPathSensitiveChecks(AnalysisConsumer &C, AnalysisManager &mgr,
                                    Decl *D) {

   switch (mgr.getLangOptions().getGC()) {
   case LangOptions::NonGC:
     ActionExprEngine(C, mgr, D, false);
     break;

   case LangOptions::GCOnly:
     ActionExprEngine(C, mgr, D, true);
     break;

   case LangOptions::HybridGC:
     ActionExprEngine(C, mgr, D, false);
     ActionExprEngine(C, mgr, D, true);
     break;
   }
 }

 //===----------------------------------------------------------------------===//
 // AnalysisConsumer creation.
 //===----------------------------------------------------------------------===//

 ASTConsumer* ento::CreateAnalysisConsumer(const Preprocessor& pp,
                                           const std::string& outDir,
                                           const AnalyzerOptions& opts,
                                           ArrayRef<std::string> plugins) {
   // Disable the effects of '-Werror' when using the AnalysisConsumer.
   pp.getDiagnostics().setWarningsAsErrors(false);

   return new AnalysisConsumer(pp, outDir, opts, plugins);
 }

 //===----------------------------------------------------------------------===//
 // Ubigraph Visualization.  FIXME: Move to separate file.
 //===----------------------------------------------------------------------===//

 namespace {

 class UbigraphViz : public ExplodedNode::Auditor {
   llvm::OwningPtr<raw_ostream> Out;
   llvm::sys::Path Dir, Filename;
   unsigned Cntr;

   typedef llvm::DenseMap<void*,unsigned> VMap;
   VMap M;

 public:
   UbigraphViz(raw_ostream *out, llvm::sys::Path& dir,
               llvm::sys::Path& filename);

   ~UbigraphViz();

   virtual void AddEdge(ExplodedNode *Src, ExplodedNode *Dst);
 };

 } // end anonymous namespace

 static ExplodedNode::Auditor* CreateUbiViz() {
   std::string ErrMsg;

   llvm::sys::Path Dir = llvm::sys::Path::GetTemporaryDirectory(&ErrMsg);
   if (!ErrMsg.empty())
     return 0;

   llvm::sys::Path Filename = Dir;
   Filename.appendComponent("llvm_ubi");
   Filename.makeUnique(true,&ErrMsg);

   if (!ErrMsg.empty())
     return 0;

   llvm::errs() << "Writing '" << Filename.str() << "'.\n";

   llvm::OwningPtr<llvm::raw_fd_ostream> Stream;
   Stream.reset(new llvm::raw_fd_ostream(Filename.c_str(), ErrMsg));

   if (!ErrMsg.empty())
     return 0;

   return new UbigraphViz(Stream.take(), Dir, Filename);
 }

 void UbigraphViz::AddEdge(ExplodedNode *Src, ExplodedNode *Dst) {

   assert (Src != Dst && "Self-edges are not allowed.");

   // Lookup the Src.  If it is a new node, it's a root.
   VMap::iterator SrcI= M.find(Src);
   unsigned SrcID;

   if (SrcI == M.end()) {
     M[Src] = SrcID = Cntr++;
     *Out << "('vertex', " << SrcID << ", ('color','#00ff00'))\n";
   }
   else
     SrcID = SrcI->second;

   // Lookup the Dst.
   VMap::iterator DstI= M.find(Dst);
   unsigned DstID;

   if (DstI == M.end()) {
     M[Dst] = DstID = Cntr++;
     *Out << "('vertex', " << DstID << ")\n";
   }
   else {
     // We have hit DstID before.  Change its style to reflect a cache hit.
     DstID = DstI->second;
     *Out << "('change_vertex_style', " << DstID << ", 1)\n";
   }

   // Add the edge.
   *Out << "('edge', " << SrcID << ", " << DstID
        << ", ('arrow','true'), ('oriented', 'true'))\n";
 }

 UbigraphViz::UbigraphViz(raw_ostream *out, llvm::sys::Path& dir,
                          llvm::sys::Path& filename)
   : Out(out), Dir(dir), Filename(filename), Cntr(0) {

   *Out << "('vertex_style_attribute', 0, ('shape', 'icosahedron'))\n";
   *Out << "('vertex_style', 1, 0, ('shape', 'sphere'), ('color', '#ffcc66'),"
           " ('size', '1.5'))\n";
 }

 UbigraphViz::~UbigraphViz() {
   Out.reset(0);
   llvm::errs() << "Running 'ubiviz' program... ";
   std::string ErrMsg;
   llvm::sys::Path Ubiviz = llvm::sys::Program::FindProgramByName("ubiviz");
   std::vector<const char*> args;
   args.push_back(Ubiviz.c_str());
   args.push_back(Filename.c_str());
   args.push_back(0);

   if (llvm::sys::Program::ExecuteAndWait(Ubiviz, &args[0],0,0,0,0,&ErrMsg)) {
     llvm::errs() << "Error viewing graph: " << ErrMsg << "\n";
   }

   // Delete the directory.
   Dir.eraseFromDisk(true);
 }
	//===--- AnalysisConsumer.cpp - ASTConsumer for running Analyses ----------===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//
	//
	// "Meta" ASTConsumer for running different source analyses.
	//
	//===----------------------------------------------------------------------===//

	#include "AnalysisConsumer.h"
	#include "clang/AST/ASTConsumer.h"
	#include "clang/AST/Decl.h"
	#include "clang/AST/DeclCXX.h"
	#include "clang/AST/DeclObjC.h"
	#include "clang/AST/ParentMap.h"
	#include "clang/Analysis/CFG.h"
	#include "clang/StaticAnalyzer/Frontend/CheckerRegistration.h"
	#include "clang/StaticAnalyzer/Core/CheckerManager.h"
	#include "clang/StaticAnalyzer/Checkers/LocalCheckers.h"
	#include "clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h"
	#include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h"
	#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
	#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
	#include "clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h"

	#include "clang/Basic/FileManager.h"
	#include "clang/Basic/SourceManager.h"
	#include "clang/Frontend/AnalyzerOptions.h"
	#include "clang/Lex/Preprocessor.h"
	#include "llvm/Support/raw_ostream.h"
	#include "llvm/Support/Path.h"
	#include "llvm/Support/Program.h"
	#include "llvm/ADT/OwningPtr.h"

	using namespace clang;
	using namespace ento;

	static ExplodedNode::Auditor* CreateUbiViz();

	//===----------------------------------------------------------------------===//
	// Special PathDiagnosticConsumers.
	//===----------------------------------------------------------------------===//

	static PathDiagnosticConsumer*
	createPlistHTMLDiagnosticConsumer(const std::string& prefix,
	const Preprocessor &PP) {
	PathDiagnosticConsumer *PD =
	createHTMLDiagnosticConsumer(llvm::sys::path::parent_path(prefix), PP);
	return createPlistDiagnosticConsumer(prefix, PP, PD);
	}

	//===----------------------------------------------------------------------===//
	// AnalysisConsumer declaration.
	//===----------------------------------------------------------------------===//

	namespace {

	class AnalysisConsumer : public ASTConsumer {
	public:
	ASTContext *Ctx;
	const Preprocessor &PP;
	const std::string OutDir;
	AnalyzerOptions Opts;
	ArrayRef<std::string> Plugins;

	// PD is owned by AnalysisManager.
	PathDiagnosticConsumer *PD;

	StoreManagerCreator CreateStoreMgr;
	ConstraintManagerCreator CreateConstraintMgr;

	llvm::OwningPtr<CheckerManager> checkerMgr;
	llvm::OwningPtr<AnalysisManager> Mgr;

	AnalysisConsumer(const Preprocessor& pp,
	const std::string& outdir,
	const AnalyzerOptions& opts,
	ArrayRef<std::string> plugins)
	: Ctx(0), PP(pp), OutDir(outdir), Opts(opts), Plugins(plugins), PD(0) {
	DigestAnalyzerOptions();
	}

	void DigestAnalyzerOptions() {
	// Create the PathDiagnosticConsumer.
	if (!OutDir.empty()) {
	switch (Opts.AnalysisDiagOpt) {
	default:
	#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATEFN, AUTOCREATE) \
	case PD_##NAME: PD = CREATEFN(OutDir, PP); break;
	#include "clang/Frontend/Analyses.def"
	}
	} else if (Opts.AnalysisDiagOpt == PD_TEXT) {
	// Create the text client even without a specified output file since
	// it just uses diagnostic notes.
	PD = createTextPathDiagnosticConsumer("", PP);
	}

	// Create the analyzer component creators.
	switch (Opts.AnalysisStoreOpt) {
	default:
	llvm_unreachable("Unknown store manager.");
	#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATEFN) \
	case NAME##Model: CreateStoreMgr = CREATEFN; break;
	#include "clang/Frontend/Analyses.def"
	}

	switch (Opts.AnalysisConstraintsOpt) {
	default:
	llvm_unreachable("Unknown store manager.");
	#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATEFN) \
	case NAME##Model: CreateConstraintMgr = CREATEFN; break;
	#include "clang/Frontend/Analyses.def"
	}
	}

	void DisplayFunction(const Decl *D) {
	if (!Opts.AnalyzerDisplayProgress)
	return;

	SourceManager &SM = Mgr->getASTContext().getSourceManager();
	PresumedLoc Loc = SM.getPresumedLoc(D->getLocation());
	if (Loc.isValid()) {
	llvm::errs() << "ANALYZE: " << Loc.getFilename();

	if (isa<FunctionDecl>(D) \|\| isa<ObjCMethodDecl>(D)) {
	const NamedDecl *ND = cast<NamedDecl>(D);
	llvm::errs() << ' ' << *ND << '\n';
	}
	else if (isa<BlockDecl>(D)) {
	llvm::errs() << ' ' << "block(line:" << Loc.getLine() << ",col:"
	<< Loc.getColumn() << '\n';
	}
	else if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(D)) {
	Selector S = MD->getSelector();
	llvm::errs() << ' ' << S.getAsString();
	}
	}
	}

	virtual void Initialize(ASTContext &Context) {
	Ctx = &Context;
	checkerMgr.reset(createCheckerManager(Opts, PP.getLangOptions(), Plugins,
	PP.getDiagnostics()));
	Mgr.reset(new AnalysisManager(*Ctx, PP.getDiagnostics(),
	PP.getLangOptions(), PD,
	CreateStoreMgr, CreateConstraintMgr,
	checkerMgr.get(),
	/* Indexer */ 0,
	Opts.MaxNodes, Opts.MaxLoop,
	Opts.VisualizeEGDot, Opts.VisualizeEGUbi,
	Opts.AnalysisPurgeOpt, Opts.EagerlyAssume,
	Opts.TrimGraph, Opts.InlineCall,
	Opts.UnoptimizedCFG, Opts.CFGAddImplicitDtors,
	Opts.CFGAddInitializers,
	Opts.EagerlyTrimEGraph));
	}

	virtual void HandleTranslationUnit(ASTContext &C);
	void HandleDeclContext(ASTContext &C, DeclContext *dc);
	void HandleDeclContextDecl(ASTContext &C, Decl *D);

	void HandleCode(Decl *D);
	};
	} // end anonymous namespace

	//===----------------------------------------------------------------------===//
	// AnalysisConsumer implementation.
	//===----------------------------------------------------------------------===//

	void AnalysisConsumer::HandleDeclContext(ASTContext &C, DeclContext *dc) {
	for (DeclContext::decl_iterator I = dc->decls_begin(), E = dc->decls_end();
	I != E; ++I) {
	HandleDeclContextDecl(C, *I);
	}
	}

	void AnalysisConsumer::HandleDeclContextDecl(ASTContext &C, Decl *D) {
	{ // Handle callbacks for arbitrary decls.
	BugReporter BR(*Mgr);
	checkerMgr->runCheckersOnASTDecl(D, *Mgr, BR);
	}

	switch (D->getKind()) {
	case Decl::Namespace: {
	HandleDeclContext(C, cast<NamespaceDecl>(D));
	break;
	}
	case Decl::CXXConstructor:
	case Decl::CXXDestructor:
	case Decl::CXXConversion:
	case Decl::CXXMethod:
	case Decl::Function: {
	FunctionDecl *FD = cast<FunctionDecl>(D);
	// We skip function template definitions, as their semantics is
	// only determined when they are instantiated.
	if (FD->isThisDeclarationADefinition() &&
	!FD->isDependentContext()) {
	if (!Opts.AnalyzeSpecificFunction.empty() &&
	FD->getDeclName().getAsString() != Opts.AnalyzeSpecificFunction)
	break;
	DisplayFunction(FD);
	HandleCode(FD);
	}
	break;
	}

	case Decl::ObjCCategoryImpl:
	case Decl::ObjCImplementation: {
	ObjCImplDecl *ID = cast<ObjCImplDecl>(D);
	HandleCode(ID);

	for (ObjCContainerDecl::method_iterator MI = ID->meth_begin(),
	ME = ID->meth_end(); MI != ME; ++MI) {
	BugReporter BR(*Mgr);
	checkerMgr->runCheckersOnASTDecl(MI, Mgr, BR);

	if ((*MI)->isThisDeclarationADefinition()) {
	if (!Opts.AnalyzeSpecificFunction.empty() &&
	Opts.AnalyzeSpecificFunction !=
	(*MI)->getSelector().getAsString())
	continue;
	DisplayFunction(*MI);
	HandleCode(*MI);
	}
	}
	break;
	}

	default:
	break;
	}
	}

	void AnalysisConsumer::HandleTranslationUnit(ASTContext &C) {
	{
	// Introduce a scope to destroy BR before Mgr.
	BugReporter BR(*Mgr);
	TranslationUnitDecl *TU = C.getTranslationUnitDecl();
	checkerMgr->runCheckersOnASTDecl(TU, *Mgr, BR);
	HandleDeclContext(C, TU);

	// After all decls handled, run checkers on the entire TranslationUnit.
	checkerMgr->runCheckersOnEndOfTranslationUnit(TU, *Mgr, BR);
	}

	// Explicitly destroy the PathDiagnosticConsumer. This will flush its output.
	// FIXME: This should be replaced with something that doesn't rely on
	// side-effects in PathDiagnosticConsumer's destructor. This is required when
	// used with option -disable-free.
	Mgr.reset(NULL);
	}

	static void FindBlocks(DeclContext D, SmallVectorImpl<Decl> &WL) {
	if (BlockDecl *BD = dyn_cast<BlockDecl>(D))
	WL.push_back(BD);

	for (DeclContext::decl_iterator I = D->decls_begin(), E = D->decls_end();
	I!=E; ++I)
	if (DeclContext DC = dyn_cast<DeclContext>(I))
	FindBlocks(DC, WL);
	}

	static void RunPathSensitiveChecks(AnalysisConsumer &C, AnalysisManager &mgr,
	Decl *D);

	void AnalysisConsumer::HandleCode(Decl *D) {

	// Don't run the actions if an error has occurred with parsing the file.
	DiagnosticsEngine &Diags = PP.getDiagnostics();
	if (Diags.hasErrorOccurred() \|\| Diags.hasFatalErrorOccurred())
	return;

	// Don't run the actions on declarations in header files unless
	// otherwise specified.
	SourceManager &SM = Ctx->getSourceManager();
	SourceLocation SL = SM.getExpansionLoc(D->getLocation());
	if (!Opts.AnalyzeAll && !SM.isFromMainFile(SL))
	return;

	// Clear the AnalysisManager of old AnalysisDeclContexts.
	Mgr->ClearContexts();

	// Dispatch on the actions.
	SmallVector<Decl*, 10> WL;
	WL.push_back(D);

	if (D->hasBody() && Opts.AnalyzeNestedBlocks)
	FindBlocks(cast<DeclContext>(D), WL);

	BugReporter BR(*Mgr);
	for (SmallVectorImpl<Decl*>::iterator WI=WL.begin(), WE=WL.end();
	WI != WE; ++WI)
	if ((*WI)->hasBody()) {
	checkerMgr->runCheckersOnASTBody(WI, Mgr, BR);
	if (checkerMgr->hasPathSensitiveCheckers())
	RunPathSensitiveChecks(this, Mgr, *WI);
	}
	}

	//===----------------------------------------------------------------------===//
	// Path-sensitive checking.
	//===----------------------------------------------------------------------===//

	static void ActionExprEngine(AnalysisConsumer &C, AnalysisManager &mgr,
	Decl *D, bool ObjCGCEnabled) {
	// Construct the analysis engine. First check if the CFG is valid.
	// FIXME: Inter-procedural analysis will need to handle invalid CFGs.
	if (!mgr.getCFG(D))
	return;
	ExprEngine Eng(mgr, ObjCGCEnabled);

	// Set the graph auditor.
	llvm::OwningPtr<ExplodedNode::Auditor> Auditor;
	if (mgr.shouldVisualizeUbigraph()) {
	Auditor.reset(CreateUbiViz());
	ExplodedNode::SetAuditor(Auditor.get());
	}

	// Execute the worklist algorithm.
	Eng.ExecuteWorkList(mgr.getAnalysisDeclContextManager().getStackFrame(D, 0),
	mgr.getMaxNodes());

	// Release the auditor (if any) so that it doesn't monitor the graph
	// created BugReporter.
	ExplodedNode::SetAuditor(0);

	// Visualize the exploded graph.
	if (mgr.shouldVisualizeGraphviz())
	Eng.ViewGraph(mgr.shouldTrimGraph());

	// Display warnings.
	Eng.getBugReporter().FlushReports();
	}

	static void RunPathSensitiveChecks(AnalysisConsumer &C, AnalysisManager &mgr,
	Decl *D) {

	switch (mgr.getLangOptions().getGC()) {
	case LangOptions::NonGC:
	ActionExprEngine(C, mgr, D, false);
	break;

	case LangOptions::GCOnly:
	ActionExprEngine(C, mgr, D, true);
	break;

	case LangOptions::HybridGC:
	ActionExprEngine(C, mgr, D, false);
	ActionExprEngine(C, mgr, D, true);
	break;
	}
	}

	//===----------------------------------------------------------------------===//
	// AnalysisConsumer creation.
	//===----------------------------------------------------------------------===//

	ASTConsumer* ento::CreateAnalysisConsumer(const Preprocessor& pp,
	const std::string& outDir,
	const AnalyzerOptions& opts,
	ArrayRef<std::string> plugins) {
	// Disable the effects of '-Werror' when using the AnalysisConsumer.
	pp.getDiagnostics().setWarningsAsErrors(false);

	return new AnalysisConsumer(pp, outDir, opts, plugins);
	}

	//===----------------------------------------------------------------------===//
	// Ubigraph Visualization. FIXME: Move to separate file.
	//===----------------------------------------------------------------------===//

	namespace {

	class UbigraphViz : public ExplodedNode::Auditor {
	llvm::OwningPtr<raw_ostream> Out;
	llvm::sys::Path Dir, Filename;
	unsigned Cntr;

	typedef llvm::DenseMap<void*,unsigned> VMap;
	VMap M;

	public:
	UbigraphViz(raw_ostream *out, llvm::sys::Path& dir,
	llvm::sys::Path& filename);

	~UbigraphViz();

	virtual void AddEdge(ExplodedNode Src, ExplodedNode Dst);
	};

	} // end anonymous namespace

	static ExplodedNode::Auditor* CreateUbiViz() {
	std::string ErrMsg;

	llvm::sys::Path Dir = llvm::sys::Path::GetTemporaryDirectory(&ErrMsg);
	if (!ErrMsg.empty())
	return 0;

	llvm::sys::Path Filename = Dir;
	Filename.appendComponent("llvm_ubi");
	Filename.makeUnique(true,&ErrMsg);

	if (!ErrMsg.empty())
	return 0;

	llvm::errs() << "Writing '" << Filename.str() << "'.\n";

	llvm::OwningPtr<llvm::raw_fd_ostream> Stream;
	Stream.reset(new llvm::raw_fd_ostream(Filename.c_str(), ErrMsg));

	if (!ErrMsg.empty())
	return 0;

	return new UbigraphViz(Stream.take(), Dir, Filename);
	}

	void UbigraphViz::AddEdge(ExplodedNode Src, ExplodedNode Dst) {

	assert (Src != Dst && "Self-edges are not allowed.");

	// Lookup the Src. If it is a new node, it's a root.
	VMap::iterator SrcI= M.find(Src);
	unsigned SrcID;

	if (SrcI == M.end()) {
	M[Src] = SrcID = Cntr++;
	*Out << "('vertex', " << SrcID << ", ('color','#00ff00'))\n";
	}
	else
	SrcID = SrcI->second;

	// Lookup the Dst.
	VMap::iterator DstI= M.find(Dst);
	unsigned DstID;

	if (DstI == M.end()) {
	M[Dst] = DstID = Cntr++;
	*Out << "('vertex', " << DstID << ")\n";
	}
	else {
	// We have hit DstID before. Change its style to reflect a cache hit.
	DstID = DstI->second;
	*Out << "('change_vertex_style', " << DstID << ", 1)\n";
	}

	// Add the edge.
	*Out << "('edge', " << SrcID << ", " << DstID
	<< ", ('arrow','true'), ('oriented', 'true'))\n";
	}

	UbigraphViz::UbigraphViz(raw_ostream *out, llvm::sys::Path& dir,
	llvm::sys::Path& filename)
	: Out(out), Dir(dir), Filename(filename), Cntr(0) {

	*Out << "('vertex_style_attribute', 0, ('shape', 'icosahedron'))\n";
	*Out << "('vertex_style', 1, 0, ('shape', 'sphere'), ('color', '#ffcc66'),"
	" ('size', '1.5'))\n";
	}

	UbigraphViz::~UbigraphViz() {
	Out.reset(0);
	llvm::errs() << "Running 'ubiviz' program... ";
	std::string ErrMsg;
	llvm::sys::Path Ubiviz = llvm::sys::Program::FindProgramByName("ubiviz");
	std::vector<const char*> args;
	args.push_back(Ubiviz.c_str());
	args.push_back(Filename.c_str());
	args.push_back(0);

	if (llvm::sys::Program::ExecuteAndWait(Ubiviz, &args[0],0,0,0,0,&ErrMsg)) {
	llvm::errs() << "Error viewing graph: " << ErrMsg << "\n";
	}

	// Delete the directory.
	Dir.eraseFromDisk(true);
	}