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+//===--- 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 "clang/EntoSA/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/Analyses/LiveVariables.h"
+#include "clang/Analysis/Analyses/UninitializedValues.h"
+#include "clang/Analysis/CFG.h"
+#include "clang/EntoSA/Checkers/LocalCheckers.h"
+#include "clang/EntoSA/ManagerRegistry.h"
+#include "clang/EntoSA/BugReporter/PathDiagnostic.h"
+#include "clang/EntoSA/PathSensitive/AnalysisManager.h"
+#include "clang/EntoSA/BugReporter/BugReporter.h"
+#include "clang/EntoSA/PathSensitive/ExprEngine.h"
+#include "clang/EntoSA/PathSensitive/TransferFuncs.h"
+#include "clang/EntoSA/PathDiagnosticClients.h"
+
+// FIXME: Restructure checker registration.
+#include "ExprEngineExperimentalChecks.h"
+#include "ExprEngineInternalChecks.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 PathDiagnosticClients.
+//===----------------------------------------------------------------------===//
+
+static PathDiagnosticClient*
+createPlistHTMLDiagnosticClient(const std::string& prefix,
+ const Preprocessor &PP) {
+ PathDiagnosticClient *PD =
+ createHTMLDiagnosticClient(llvm::sys::path::parent_path(prefix), PP);
+ return createPlistDiagnosticClient(prefix, PP, PD);
+}
+
+//===----------------------------------------------------------------------===//
+// AnalysisConsumer declaration.
+//===----------------------------------------------------------------------===//
+
+namespace {
+
+class AnalysisConsumer : public ASTConsumer {
+public:
+ typedef void (*CodeAction)(AnalysisConsumer &C, AnalysisManager &M, Decl *D);
+ typedef void (*TUAction)(AnalysisConsumer &C, AnalysisManager &M,
+ TranslationUnitDecl &TU);
+
+private:
+ typedef std::vector<CodeAction> Actions;
+ typedef std::vector<TUAction> TUActions;
+
+ Actions FunctionActions;
+ Actions ObjCMethodActions;
+ Actions ObjCImplementationActions;
+ Actions CXXMethodActions;
+ TUActions TranslationUnitActions; // Remove this.
+
+public:
+ ASTContext* Ctx;
+ const Preprocessor &PP;
+ const std::string OutDir;
+ AnalyzerOptions Opts;
+
+ // PD is owned by AnalysisManager.
+ PathDiagnosticClient *PD;
+
+ StoreManagerCreator CreateStoreMgr;
+ ConstraintManagerCreator CreateConstraintMgr;
+
+ llvm::OwningPtr<AnalysisManager> Mgr;
+
+ AnalysisConsumer(const Preprocessor& pp,
+ const std::string& outdir,
+ const AnalyzerOptions& opts)
+ : Ctx(0), PP(pp), OutDir(outdir),
+ Opts(opts), PD(0) {
+ DigestAnalyzerOptions();
+ }
+
+ void DigestAnalyzerOptions() {
+ // Create the PathDiagnosticClient.
+ 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 = createTextPathDiagnosticClient("", PP);
+ }
+
+ // Create the analyzer component creators.
+ if (ManagerRegistry::StoreMgrCreator != 0) {
+ CreateStoreMgr = ManagerRegistry::StoreMgrCreator;
+ }
+ else {
+ switch (Opts.AnalysisStoreOpt) {
+ default:
+ assert(0 && "Unknown store manager.");
+#define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATEFN) \
+ case NAME##Model: CreateStoreMgr = CREATEFN; break;
+#include "clang/Frontend/Analyses.def"
+ }
+ }
+
+ if (ManagerRegistry::ConstraintMgrCreator != 0)
+ CreateConstraintMgr = ManagerRegistry::ConstraintMgrCreator;
+ else {
+ switch (Opts.AnalysisConstraintsOpt) {
+ default:
+ assert(0 && "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();
+ }
+ }
+ }
+
+ void addCodeAction(CodeAction action) {
+ FunctionActions.push_back(action);
+ ObjCMethodActions.push_back(action);
+ CXXMethodActions.push_back(action);
+ }
+
+ void addTranslationUnitAction(TUAction action) {
+ TranslationUnitActions.push_back(action);
+ }
+
+ void addObjCImplementationAction(CodeAction action) {
+ ObjCImplementationActions.push_back(action);
+ }
+
+ virtual void Initialize(ASTContext &Context) {
+ Ctx = &Context;
+ Mgr.reset(new AnalysisManager(*Ctx, PP.getDiagnostics(),
+ PP.getLangOptions(), PD,
+ CreateStoreMgr, CreateConstraintMgr,
+ /* Indexer */ 0,
+ Opts.MaxNodes, Opts.MaxLoop,
+ Opts.VisualizeEGDot, Opts.VisualizeEGUbi,
+ Opts.PurgeDead, Opts.EagerlyAssume,
+ Opts.TrimGraph, Opts.InlineCall,
+ Opts.UnoptimizedCFG, Opts.CFGAddImplicitDtors,
+ Opts.CFGAddInitializers));
+ }
+
+ virtual void HandleTranslationUnit(ASTContext &C);
+ void HandleCode(Decl *D, Actions& actions);
+};
+} // end anonymous namespace
+
+//===----------------------------------------------------------------------===//
+// AnalysisConsumer implementation.
+//===----------------------------------------------------------------------===//
+
+void AnalysisConsumer::HandleTranslationUnit(ASTContext &C) {
+
+ TranslationUnitDecl *TU = C.getTranslationUnitDecl();
+
+ for (DeclContext::decl_iterator I = TU->decls_begin(), E = TU->decls_end();
+ I != E; ++I) {
+ Decl *D = *I;
+
+ switch (D->getKind()) {
+ 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, FunctionActions);
+ }
+ break;
+ }
+
+ case Decl::ObjCImplementation: {
+ ObjCImplementationDecl* ID = cast<ObjCImplementationDecl>(*I);
+ HandleCode(ID, ObjCImplementationActions);
+
+ for (ObjCImplementationDecl::method_iterator MI = ID->meth_begin(),
+ ME = ID->meth_end(); MI != ME; ++MI) {
+ if ((*MI)->isThisDeclarationADefinition()) {
+ if (!Opts.AnalyzeSpecificFunction.empty() &&
+ Opts.AnalyzeSpecificFunction != (*MI)->getSelector().getAsString())
+ break;
+ DisplayFunction(*MI);
+ HandleCode(*MI, ObjCMethodActions);
+ }
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+ }
+
+ for (TUActions::iterator I = TranslationUnitActions.begin(),
+ E = TranslationUnitActions.end(); I != E; ++I) {
+ (*I)(*this, *Mgr, *TU);
+ }
+
+ // Explicitly destroy the PathDiagnosticClient. This will flush its output.
+ // FIXME: This should be replaced with something that doesn't rely on
+ // side-effects in PathDiagnosticClient's destructor. This is required when
+ // used with option -disable-free.
+ Mgr.reset(NULL);
+}
+
+static void FindBlocks(DeclContext *D, llvm::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);
+}
+
+void AnalysisConsumer::HandleCode(Decl *D, Actions& actions) {
+
+ // Don't run the actions if an error has occured with parsing the file.
+ Diagnostic &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.getInstantiationLoc(D->getLocation());
+ if (!Opts.AnalyzeAll && !SM.isFromMainFile(SL))
+ return;
+
+ // Clear the AnalysisManager of old AnalysisContexts.
+ Mgr->ClearContexts();
+
+ // Dispatch on the actions.
+ llvm::SmallVector<Decl*, 10> WL;
+ WL.push_back(D);
+
+ if (D->hasBody() && Opts.AnalyzeNestedBlocks)
+ FindBlocks(cast<DeclContext>(D), WL);
+
+ for (Actions::iterator I = actions.begin(), E = actions.end(); I != E; ++I)
+ for (llvm::SmallVectorImpl<Decl*>::iterator WI=WL.begin(), WE=WL.end();
+ WI != WE; ++WI)
+ (*I)(*this, *Mgr, *WI);
+}
+
+//===----------------------------------------------------------------------===//
+// Analyses
+//===----------------------------------------------------------------------===//
+
+static void ActionWarnDeadStores(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D) {
+ if (LiveVariables *L = mgr.getLiveVariables(D)) {
+ BugReporter BR(mgr);
+ CheckDeadStores(*mgr.getCFG(D), *L, mgr.getParentMap(D), BR);
+ }
+}
+
+static void ActionWarnUninitVals(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D) {
+ if (CFG* c = mgr.getCFG(D)) {
+ CheckUninitializedValues(*c, mgr.getASTContext(), mgr.getDiagnostic());
+ }
+}
+
+
+static void ActionExprEngine(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D,
+ TransferFuncs* tf) {
+
+ llvm::OwningPtr<TransferFuncs> TF(tf);
+
+ // Construct the analysis engine. We first query for the LiveVariables
+ // information to see if the CFG is valid.
+ // FIXME: Inter-procedural analysis will need to handle invalid CFGs.
+ if (!mgr.getLiveVariables(D))
+ return;
+ ExprEngine Eng(mgr, TF.take());
+
+ if (C.Opts.EnableExperimentalInternalChecks)
+ RegisterExperimentalInternalChecks(Eng);
+
+ RegisterAppleChecks(Eng, *D);
+
+ if (C.Opts.EnableExperimentalChecks)
+ RegisterExperimentalChecks(Eng);
+
+ // Enable idempotent operation checking if it was explicitly turned on, or if
+ // we are running experimental checks (i.e. everything)
+ if (C.Opts.IdempotentOps || C.Opts.EnableExperimentalChecks
+ || C.Opts.EnableExperimentalInternalChecks)
+ RegisterIdempotentOperationChecker(Eng);
+
+ if (C.Opts.BufferOverflows)
+ RegisterArrayBoundCheckerV2(Eng);
+
+ // Enable AnalyzerStatsChecker if it was given as an argument
+ if (C.Opts.AnalyzerStats)
+ RegisterAnalyzerStatsChecker(Eng);
+
+ // 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.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 ActionObjCMemCheckerAux(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D, bool GCEnabled) {
+
+ TransferFuncs* TF = MakeCFRefCountTF(mgr.getASTContext(),
+ GCEnabled,
+ mgr.getLangOptions());
+
+ ActionExprEngine(C, mgr, D, TF);
+}
+
+static void ActionObjCMemChecker(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D) {
+
+ switch (mgr.getLangOptions().getGCMode()) {
+ default:
+ assert (false && "Invalid GC mode.");
+ case LangOptions::NonGC:
+ ActionObjCMemCheckerAux(C, mgr, D, false);
+ break;
+
+ case LangOptions::GCOnly:
+ ActionObjCMemCheckerAux(C, mgr, D, true);
+ break;
+
+ case LangOptions::HybridGC:
+ ActionObjCMemCheckerAux(C, mgr, D, false);
+ ActionObjCMemCheckerAux(C, mgr, D, true);
+ break;
+ }
+}
+
+static void ActionDisplayLiveVariables(AnalysisConsumer &C,
+ AnalysisManager& mgr, Decl *D) {
+ if (LiveVariables* L = mgr.getLiveVariables(D)) {
+ L->dumpBlockLiveness(mgr.getSourceManager());
+ }
+}
+
+static void ActionCFGDump(AnalysisConsumer &C, AnalysisManager& mgr, Decl *D) {
+ if (CFG *cfg = mgr.getCFG(D)) {
+ cfg->dump(mgr.getLangOptions());
+ }
+}
+
+static void ActionCFGView(AnalysisConsumer &C, AnalysisManager& mgr, Decl *D) {
+ if (CFG *cfg = mgr.getCFG(D)) {
+ cfg->viewCFG(mgr.getLangOptions());
+ }
+}
+
+static void ActionSecuritySyntacticChecks(AnalysisConsumer &C,
+ AnalysisManager &mgr, Decl *D) {
+ BugReporter BR(mgr);
+ CheckSecuritySyntaxOnly(D, BR);
+}
+
+static void ActionLLVMConventionChecker(AnalysisConsumer &C,
+ AnalysisManager &mgr,
+ TranslationUnitDecl &TU) {
+ BugReporter BR(mgr);
+ CheckLLVMConventions(TU, BR);
+}
+
+static void ActionWarnObjCDealloc(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D) {
+ if (mgr.getLangOptions().getGCMode() == LangOptions::GCOnly)
+ return;
+ BugReporter BR(mgr);
+ CheckObjCDealloc(cast<ObjCImplementationDecl>(D), mgr.getLangOptions(), BR);
+}
+
+static void ActionWarnObjCUnusedIvars(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D) {
+ BugReporter BR(mgr);
+ CheckObjCUnusedIvar(cast<ObjCImplementationDecl>(D), BR);
+}
+
+static void ActionWarnObjCMethSigs(AnalysisConsumer &C, AnalysisManager& mgr,
+ Decl *D) {
+ BugReporter BR(mgr);
+ CheckObjCInstMethSignature(cast<ObjCImplementationDecl>(D), BR);
+}
+
+static void ActionWarnSizeofPointer(AnalysisConsumer &C, AnalysisManager &mgr,
+ Decl *D) {
+ BugReporter BR(mgr);
+ CheckSizeofPointer(D, BR);
+}
+
+//===----------------------------------------------------------------------===//
+// AnalysisConsumer creation.
+//===----------------------------------------------------------------------===//
+
+ASTConsumer* ento::CreateAnalysisConsumer(const Preprocessor& pp,
+ const std::string& OutDir,
+ const AnalyzerOptions& Opts) {
+ llvm::OwningPtr<AnalysisConsumer> C(new AnalysisConsumer(pp, OutDir, Opts));
+
+ for (unsigned i = 0; i < Opts.AnalysisList.size(); ++i)
+ switch (Opts.AnalysisList[i]) {
+#define ANALYSIS(NAME, CMD, DESC, SCOPE)\
+ case NAME:\
+ C->add ## SCOPE ## Action(&Action ## NAME);\
+ break;
+#include "clang/Frontend/Analyses.def"
+ default: break;
+ }
+
+ // Last, disable the effects of '-Werror' when using the AnalysisConsumer.
+ pp.getDiagnostics().setWarningsAsErrors(false);
+
+ return C.take();
+}
+
+//===----------------------------------------------------------------------===//
+// Ubigraph Visualization. FIXME: Move to separate file.
+//===----------------------------------------------------------------------===//
+
+namespace {
+
+class UbigraphViz : public ExplodedNode::Auditor {
+ llvm::OwningPtr<llvm::raw_ostream> Out;
+ llvm::sys::Path Dir, Filename;
+ unsigned Cntr;
+
+ typedef llvm::DenseMap<void*,unsigned> VMap;
+ VMap M;
+
+public:
+ UbigraphViz(llvm::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(llvm::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);
+}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-22 07:25:18 +0000