1 //===--- AnalysisConsumer.cpp - ASTConsumer for running Analyses ----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // "Meta" ASTConsumer for running different source analyses.
12 //===----------------------------------------------------------------------===//
14 #include "clang/StaticAnalyzer/Frontend/AnalysisConsumer.h"
15 #include "ModelInjector.h"
16 #include "clang/AST/Decl.h"
17 #include "clang/AST/DeclCXX.h"
18 #include "clang/AST/DeclObjC.h"
19 #include "clang/AST/RecursiveASTVisitor.h"
20 #include "clang/Analysis/Analyses/LiveVariables.h"
21 #include "clang/Analysis/CFG.h"
22 #include "clang/Analysis/CallGraph.h"
23 #include "clang/Analysis/CodeInjector.h"
24 #include "clang/Basic/SourceManager.h"
25 #include "clang/CrossTU/CrossTranslationUnit.h"
26 #include "clang/Frontend/CompilerInstance.h"
27 #include "clang/Lex/Preprocessor.h"
28 #include "clang/StaticAnalyzer/Checkers/LocalCheckers.h"
29 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
30 #include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
31 #include "clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h"
32 #include "clang/StaticAnalyzer/Core/CheckerManager.h"
33 #include "clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h"
34 #include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h"
35 #include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
36 #include "clang/StaticAnalyzer/Frontend/CheckerRegistration.h"
37 #include "llvm/ADT/PostOrderIterator.h"
38 #include "llvm/ADT/Statistic.h"
39 #include "llvm/Support/FileSystem.h"
40 #include "llvm/Support/Path.h"
41 #include "llvm/Support/Program.h"
42 #include "llvm/Support/Timer.h"
43 #include "llvm/Support/raw_ostream.h"
48 using namespace clang;
51 #define DEBUG_TYPE "AnalysisConsumer"
53 STATISTIC(NumFunctionTopLevel, "The # of functions at top level.");
54 STATISTIC(NumFunctionsAnalyzed,
55 "The # of functions and blocks analyzed (as top level "
56 "with inlining turned on).");
57 STATISTIC(NumBlocksInAnalyzedFunctions,
58 "The # of basic blocks in the analyzed functions.");
59 STATISTIC(NumVisitedBlocksInAnalyzedFunctions,
60 "The # of visited basic blocks in the analyzed functions.");
61 STATISTIC(PercentReachableBlocks, "The % of reachable basic blocks.");
62 STATISTIC(MaxCFGSize, "The maximum number of basic blocks in a function.");
64 //===----------------------------------------------------------------------===//
65 // Special PathDiagnosticConsumers.
66 //===----------------------------------------------------------------------===//
68 void ento::createPlistHTMLDiagnosticConsumer(AnalyzerOptions &AnalyzerOpts,
69 PathDiagnosticConsumers &C,
70 const std::string &prefix,
71 const Preprocessor &PP) {
72 createHTMLDiagnosticConsumer(AnalyzerOpts, C,
73 llvm::sys::path::parent_path(prefix), PP);
74 createPlistMultiFileDiagnosticConsumer(AnalyzerOpts, C, prefix, PP);
77 void ento::createTextPathDiagnosticConsumer(AnalyzerOptions &AnalyzerOpts,
78 PathDiagnosticConsumers &C,
79 const std::string &Prefix,
80 const clang::Preprocessor &PP) {
81 llvm_unreachable("'text' consumer should be enabled on ClangDiags");
85 class ClangDiagPathDiagConsumer : public PathDiagnosticConsumer {
86 DiagnosticsEngine &Diag;
89 ClangDiagPathDiagConsumer(DiagnosticsEngine &Diag)
90 : Diag(Diag), IncludePath(false) {}
91 ~ClangDiagPathDiagConsumer() override {}
92 StringRef getName() const override { return "ClangDiags"; }
94 bool supportsLogicalOpControlFlow() const override { return true; }
95 bool supportsCrossFileDiagnostics() const override { return true; }
97 PathGenerationScheme getGenerationScheme() const override {
98 return IncludePath ? Minimal : None;
105 void FlushDiagnosticsImpl(std::vector<const PathDiagnostic *> &Diags,
106 FilesMade *filesMade) override {
107 unsigned WarnID = Diag.getCustomDiagID(DiagnosticsEngine::Warning, "%0");
108 unsigned NoteID = Diag.getCustomDiagID(DiagnosticsEngine::Note, "%0");
110 for (std::vector<const PathDiagnostic*>::iterator I = Diags.begin(),
111 E = Diags.end(); I != E; ++I) {
112 const PathDiagnostic *PD = *I;
113 SourceLocation WarnLoc = PD->getLocation().asLocation();
114 Diag.Report(WarnLoc, WarnID) << PD->getShortDescription()
115 << PD->path.back()->getRanges();
117 // First, add extra notes, even if paths should not be included.
118 for (const auto &Piece : PD->path) {
119 if (!isa<PathDiagnosticNotePiece>(Piece.get()))
122 SourceLocation NoteLoc = Piece->getLocation().asLocation();
123 Diag.Report(NoteLoc, NoteID) << Piece->getString()
124 << Piece->getRanges();
130 // Then, add the path notes if necessary.
131 PathPieces FlatPath = PD->path.flatten(/*ShouldFlattenMacros=*/true);
132 for (const auto &Piece : FlatPath) {
133 if (isa<PathDiagnosticNotePiece>(Piece.get()))
136 SourceLocation NoteLoc = Piece->getLocation().asLocation();
137 Diag.Report(NoteLoc, NoteID) << Piece->getString()
138 << Piece->getRanges();
143 } // end anonymous namespace
145 //===----------------------------------------------------------------------===//
146 // AnalysisConsumer declaration.
147 //===----------------------------------------------------------------------===//
151 class AnalysisConsumer : public AnalysisASTConsumer,
152 public RecursiveASTVisitor<AnalysisConsumer> {
158 typedef unsigned AnalysisMode;
160 /// Mode of the analyzes while recursively visiting Decls.
161 AnalysisMode RecVisitorMode;
162 /// Bug Reporter to use while recursively visiting Decls.
163 BugReporter *RecVisitorBR;
165 std::vector<std::function<void(CheckerRegistry &)>> CheckerRegistrationFns;
169 const Preprocessor &PP;
170 const std::string OutDir;
171 AnalyzerOptionsRef Opts;
172 ArrayRef<std::string> Plugins;
173 CodeInjector *Injector;
174 cross_tu::CrossTranslationUnitContext CTU;
176 /// Stores the declarations from the local translation unit.
177 /// Note, we pre-compute the local declarations at parse time as an
178 /// optimization to make sure we do not deserialize everything from disk.
179 /// The local declaration to all declarations ratio might be very small when
180 /// working with a PCH file.
181 SetOfDecls LocalTUDecls;
183 // Set of PathDiagnosticConsumers. Owned by AnalysisManager.
184 PathDiagnosticConsumers PathConsumers;
186 StoreManagerCreator CreateStoreMgr;
187 ConstraintManagerCreator CreateConstraintMgr;
189 std::unique_ptr<CheckerManager> checkerMgr;
190 std::unique_ptr<AnalysisManager> Mgr;
192 /// Time the analyzes time of each translation unit.
193 std::unique_ptr<llvm::TimerGroup> AnalyzerTimers;
194 std::unique_ptr<llvm::Timer> TUTotalTimer;
196 /// The information about analyzed functions shared throughout the
197 /// translation unit.
198 FunctionSummariesTy FunctionSummaries;
200 AnalysisConsumer(CompilerInstance &CI, const std::string &outdir,
201 AnalyzerOptionsRef opts, ArrayRef<std::string> plugins,
202 CodeInjector *injector)
203 : RecVisitorMode(0), RecVisitorBR(nullptr), Ctx(nullptr),
204 PP(CI.getPreprocessor()), OutDir(outdir), Opts(std::move(opts)),
205 Plugins(plugins), Injector(injector), CTU(CI) {
206 DigestAnalyzerOptions();
207 if (Opts->PrintStats || Opts->ShouldSerializeStats) {
208 AnalyzerTimers = llvm::make_unique<llvm::TimerGroup>(
209 "analyzer", "Analyzer timers");
210 TUTotalTimer = llvm::make_unique<llvm::Timer>(
211 "time", "Analyzer total time", *AnalyzerTimers);
212 llvm::EnableStatistics(/* PrintOnExit= */ false);
216 ~AnalysisConsumer() override {
217 if (Opts->PrintStats) {
218 llvm::PrintStatistics();
222 void DigestAnalyzerOptions() {
223 if (Opts->AnalysisDiagOpt != PD_NONE) {
224 // Create the PathDiagnosticConsumer.
225 ClangDiagPathDiagConsumer *clangDiags =
226 new ClangDiagPathDiagConsumer(PP.getDiagnostics());
227 PathConsumers.push_back(clangDiags);
229 if (Opts->AnalysisDiagOpt == PD_TEXT) {
230 clangDiags->enablePaths();
232 } else if (!OutDir.empty()) {
233 switch (Opts->AnalysisDiagOpt) {
235 #define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATEFN) \
237 CREATEFN(*Opts.get(), PathConsumers, OutDir, PP); \
239 #include "clang/StaticAnalyzer/Core/Analyses.def"
244 // Create the analyzer component creators.
245 switch (Opts->AnalysisStoreOpt) {
247 llvm_unreachable("Unknown store manager.");
248 #define ANALYSIS_STORE(NAME, CMDFLAG, DESC, CREATEFN) \
249 case NAME##Model: CreateStoreMgr = CREATEFN; break;
250 #include "clang/StaticAnalyzer/Core/Analyses.def"
253 switch (Opts->AnalysisConstraintsOpt) {
255 llvm_unreachable("Unknown constraint manager.");
256 #define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATEFN) \
257 case NAME##Model: CreateConstraintMgr = CREATEFN; break;
258 #include "clang/StaticAnalyzer/Core/Analyses.def"
262 void DisplayFunction(const Decl *D, AnalysisMode Mode,
263 ExprEngine::InliningModes IMode) {
264 if (!Opts->AnalyzerDisplayProgress)
267 SourceManager &SM = Mgr->getASTContext().getSourceManager();
268 PresumedLoc Loc = SM.getPresumedLoc(D->getLocation());
270 llvm::errs() << "ANALYZE";
272 if (Mode == AM_Syntax)
273 llvm::errs() << " (Syntax)";
274 else if (Mode == AM_Path) {
275 llvm::errs() << " (Path, ";
277 case ExprEngine::Inline_Minimal:
278 llvm::errs() << " Inline_Minimal";
280 case ExprEngine::Inline_Regular:
281 llvm::errs() << " Inline_Regular";
287 assert(Mode == (AM_Syntax | AM_Path) && "Unexpected mode!");
289 llvm::errs() << ": " << Loc.getFilename() << ' '
290 << getFunctionName(D) << '\n';
294 void Initialize(ASTContext &Context) override {
296 checkerMgr = createCheckerManager(
297 *Ctx, *Opts, Plugins, CheckerRegistrationFns, PP.getDiagnostics());
299 Mgr = llvm::make_unique<AnalysisManager>(
300 *Ctx, PP.getDiagnostics(), PathConsumers, CreateStoreMgr,
301 CreateConstraintMgr, checkerMgr.get(), *Opts, Injector);
304 /// Store the top level decls in the set to be processed later on.
305 /// (Doing this pre-processing avoids deserialization of data from PCH.)
306 bool HandleTopLevelDecl(DeclGroupRef D) override;
307 void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override;
309 void HandleTranslationUnit(ASTContext &C) override;
311 /// Determine which inlining mode should be used when this function is
312 /// analyzed. This allows to redefine the default inlining policies when
313 /// analyzing a given function.
314 ExprEngine::InliningModes
315 getInliningModeForFunction(const Decl *D, const SetOfConstDecls &Visited);
317 /// Build the call graph for all the top level decls of this TU and
318 /// use it to define the order in which the functions should be visited.
319 void HandleDeclsCallGraph(const unsigned LocalTUDeclsSize);
321 /// Run analyzes(syntax or path sensitive) on the given function.
322 /// \param Mode - determines if we are requesting syntax only or path
323 /// sensitive only analysis.
324 /// \param VisitedCallees - The output parameter, which is populated with the
325 /// set of functions which should be considered analyzed after analyzing the
326 /// given root function.
327 void HandleCode(Decl *D, AnalysisMode Mode,
328 ExprEngine::InliningModes IMode = ExprEngine::Inline_Minimal,
329 SetOfConstDecls *VisitedCallees = nullptr);
331 void RunPathSensitiveChecks(Decl *D,
332 ExprEngine::InliningModes IMode,
333 SetOfConstDecls *VisitedCallees);
335 /// Visitors for the RecursiveASTVisitor.
336 bool shouldWalkTypesOfTypeLocs() const { return false; }
338 /// Handle callbacks for arbitrary Decls.
339 bool VisitDecl(Decl *D) {
340 AnalysisMode Mode = getModeForDecl(D, RecVisitorMode);
341 if (Mode & AM_Syntax)
342 checkerMgr->runCheckersOnASTDecl(D, *Mgr, *RecVisitorBR);
346 bool VisitFunctionDecl(FunctionDecl *FD) {
347 IdentifierInfo *II = FD->getIdentifier();
348 if (II && II->getName().startswith("__inline"))
351 // We skip function template definitions, as their semantics is
352 // only determined when they are instantiated.
353 if (FD->isThisDeclarationADefinition() &&
354 !FD->isDependentContext()) {
355 assert(RecVisitorMode == AM_Syntax || Mgr->shouldInlineCall() == false);
356 HandleCode(FD, RecVisitorMode);
361 bool VisitObjCMethodDecl(ObjCMethodDecl *MD) {
362 if (MD->isThisDeclarationADefinition()) {
363 assert(RecVisitorMode == AM_Syntax || Mgr->shouldInlineCall() == false);
364 HandleCode(MD, RecVisitorMode);
369 bool VisitBlockDecl(BlockDecl *BD) {
371 assert(RecVisitorMode == AM_Syntax || Mgr->shouldInlineCall() == false);
372 // Since we skip function template definitions, we should skip blocks
373 // declared in those functions as well.
374 if (!BD->isDependentContext()) {
375 HandleCode(BD, RecVisitorMode);
381 void AddDiagnosticConsumer(PathDiagnosticConsumer *Consumer) override {
382 PathConsumers.push_back(Consumer);
385 void AddCheckerRegistrationFn(std::function<void(CheckerRegistry&)> Fn) override {
386 CheckerRegistrationFns.push_back(std::move(Fn));
390 void storeTopLevelDecls(DeclGroupRef DG);
391 std::string getFunctionName(const Decl *D);
393 /// Check if we should skip (not analyze) the given function.
394 AnalysisMode getModeForDecl(Decl *D, AnalysisMode Mode);
395 void runAnalysisOnTranslationUnit(ASTContext &C);
397 /// Print \p S to stderr if \c Opts->AnalyzerDisplayProgress is set.
398 void reportAnalyzerProgress(StringRef S);
400 } // end anonymous namespace
403 //===----------------------------------------------------------------------===//
404 // AnalysisConsumer implementation.
405 //===----------------------------------------------------------------------===//
406 bool AnalysisConsumer::HandleTopLevelDecl(DeclGroupRef DG) {
407 storeTopLevelDecls(DG);
411 void AnalysisConsumer::HandleTopLevelDeclInObjCContainer(DeclGroupRef DG) {
412 storeTopLevelDecls(DG);
415 void AnalysisConsumer::storeTopLevelDecls(DeclGroupRef DG) {
416 for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I) {
418 // Skip ObjCMethodDecl, wait for the objc container to avoid
420 if (isa<ObjCMethodDecl>(*I))
423 LocalTUDecls.push_back(*I);
427 static bool shouldSkipFunction(const Decl *D,
428 const SetOfConstDecls &Visited,
429 const SetOfConstDecls &VisitedAsTopLevel) {
430 if (VisitedAsTopLevel.count(D))
433 // We want to re-analyse the functions as top level in the following cases:
434 // - The 'init' methods should be reanalyzed because
435 // ObjCNonNilReturnValueChecker assumes that '[super init]' never returns
436 // 'nil' and unless we analyze the 'init' functions as top level, we will
437 // not catch errors within defensive code.
438 // - We want to reanalyze all ObjC methods as top level to report Retain
439 // Count naming convention errors more aggressively.
440 if (isa<ObjCMethodDecl>(D))
442 // We also want to reanalyze all C++ copy and move assignment operators to
443 // separately check the two cases where 'this' aliases with the parameter and
444 // where it may not. (cplusplus.SelfAssignmentChecker)
445 if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) {
446 if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator())
450 // Otherwise, if we visited the function before, do not reanalyze it.
451 return Visited.count(D);
454 ExprEngine::InliningModes
455 AnalysisConsumer::getInliningModeForFunction(const Decl *D,
456 const SetOfConstDecls &Visited) {
457 // We want to reanalyze all ObjC methods as top level to report Retain
458 // Count naming convention errors more aggressively. But we should tune down
459 // inlining when reanalyzing an already inlined function.
460 if (Visited.count(D) && isa<ObjCMethodDecl>(D)) {
461 const ObjCMethodDecl *ObjCM = cast<ObjCMethodDecl>(D);
462 if (ObjCM->getMethodFamily() != OMF_init)
463 return ExprEngine::Inline_Minimal;
466 return ExprEngine::Inline_Regular;
469 void AnalysisConsumer::HandleDeclsCallGraph(const unsigned LocalTUDeclsSize) {
470 // Build the Call Graph by adding all the top level declarations to the graph.
471 // Note: CallGraph can trigger deserialization of more items from a pch
472 // (though HandleInterestingDecl); triggering additions to LocalTUDecls.
473 // We rely on random access to add the initially processed Decls to CG.
475 for (unsigned i = 0 ; i < LocalTUDeclsSize ; ++i) {
476 CG.addToCallGraph(LocalTUDecls[i]);
479 // Walk over all of the call graph nodes in topological order, so that we
480 // analyze parents before the children. Skip the functions inlined into
481 // the previously processed functions. Use external Visited set to identify
482 // inlined functions. The topological order allows the "do not reanalyze
483 // previously inlined function" performance heuristic to be triggered more
485 SetOfConstDecls Visited;
486 SetOfConstDecls VisitedAsTopLevel;
487 llvm::ReversePostOrderTraversal<clang::CallGraph*> RPOT(&CG);
488 for (llvm::ReversePostOrderTraversal<clang::CallGraph*>::rpo_iterator
489 I = RPOT.begin(), E = RPOT.end(); I != E; ++I) {
490 NumFunctionTopLevel++;
492 CallGraphNode *N = *I;
493 Decl *D = N->getDecl();
495 // Skip the abstract root node.
499 // Skip the functions which have been processed already or previously
501 if (shouldSkipFunction(D, Visited, VisitedAsTopLevel))
504 // Analyze the function.
505 SetOfConstDecls VisitedCallees;
507 HandleCode(D, AM_Path, getInliningModeForFunction(D, Visited),
508 (Mgr->options.InliningMode == All ? nullptr : &VisitedCallees));
510 // Add the visited callees to the global visited set.
511 for (const Decl *Callee : VisitedCallees)
512 // Decls from CallGraph are already canonical. But Decls coming from
513 // CallExprs may be not. We should canonicalize them manually.
514 Visited.insert(isa<ObjCMethodDecl>(Callee) ? Callee
515 : Callee->getCanonicalDecl());
516 VisitedAsTopLevel.insert(D);
520 static bool isBisonFile(ASTContext &C) {
521 const SourceManager &SM = C.getSourceManager();
522 FileID FID = SM.getMainFileID();
523 StringRef Buffer = SM.getBuffer(FID)->getBuffer();
524 if (Buffer.startswith("/* A Bison parser, made by"))
529 void AnalysisConsumer::runAnalysisOnTranslationUnit(ASTContext &C) {
530 BugReporter BR(*Mgr);
531 TranslationUnitDecl *TU = C.getTranslationUnitDecl();
532 checkerMgr->runCheckersOnASTDecl(TU, *Mgr, BR);
534 // Run the AST-only checks using the order in which functions are defined.
535 // If inlining is not turned on, use the simplest function order for path
536 // sensitive analyzes as well.
537 RecVisitorMode = AM_Syntax;
538 if (!Mgr->shouldInlineCall())
539 RecVisitorMode |= AM_Path;
542 // Process all the top level declarations.
544 // Note: TraverseDecl may modify LocalTUDecls, but only by appending more
545 // entries. Thus we don't use an iterator, but rely on LocalTUDecls
546 // random access. By doing so, we automatically compensate for iterators
547 // possibly being invalidated, although this is a bit slower.
548 const unsigned LocalTUDeclsSize = LocalTUDecls.size();
549 for (unsigned i = 0 ; i < LocalTUDeclsSize ; ++i) {
550 TraverseDecl(LocalTUDecls[i]);
553 if (Mgr->shouldInlineCall())
554 HandleDeclsCallGraph(LocalTUDeclsSize);
556 // After all decls handled, run checkers on the entire TranslationUnit.
557 checkerMgr->runCheckersOnEndOfTranslationUnit(TU, *Mgr, BR);
559 RecVisitorBR = nullptr;
562 void AnalysisConsumer::reportAnalyzerProgress(StringRef S) {
563 if (Opts->AnalyzerDisplayProgress)
567 void AnalysisConsumer::HandleTranslationUnit(ASTContext &C) {
569 // Don't run the actions if an error has occurred with parsing the file.
570 DiagnosticsEngine &Diags = PP.getDiagnostics();
571 if (Diags.hasErrorOccurred() || Diags.hasFatalErrorOccurred())
574 if (TUTotalTimer) TUTotalTimer->startTimer();
576 if (isBisonFile(C)) {
577 reportAnalyzerProgress("Skipping bison-generated file\n");
578 } else if (Opts->DisableAllChecks) {
580 // Don't analyze if the user explicitly asked for no checks to be performed
582 reportAnalyzerProgress("All checks are disabled using a supplied option\n");
584 // Otherwise, just run the analysis.
585 runAnalysisOnTranslationUnit(C);
588 if (TUTotalTimer) TUTotalTimer->stopTimer();
590 // Count how many basic blocks we have not covered.
591 NumBlocksInAnalyzedFunctions = FunctionSummaries.getTotalNumBasicBlocks();
592 NumVisitedBlocksInAnalyzedFunctions =
593 FunctionSummaries.getTotalNumVisitedBasicBlocks();
594 if (NumBlocksInAnalyzedFunctions > 0)
595 PercentReachableBlocks =
596 (FunctionSummaries.getTotalNumVisitedBasicBlocks() * 100) /
597 NumBlocksInAnalyzedFunctions;
599 // Explicitly destroy the PathDiagnosticConsumer. This will flush its output.
600 // FIXME: This should be replaced with something that doesn't rely on
601 // side-effects in PathDiagnosticConsumer's destructor. This is required when
602 // used with option -disable-free.
606 std::string AnalysisConsumer::getFunctionName(const Decl *D) {
608 llvm::raw_string_ostream OS(Str);
610 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
611 OS << FD->getQualifiedNameAsString();
613 // In C++, there are overloads.
614 if (Ctx->getLangOpts().CPlusPlus) {
616 for (const auto &P : FD->parameters()) {
617 if (P != *FD->param_begin())
619 OS << P->getType().getAsString();
624 } else if (isa<BlockDecl>(D)) {
625 PresumedLoc Loc = Ctx->getSourceManager().getPresumedLoc(D->getLocation());
628 OS << "block (line: " << Loc.getLine() << ", col: " << Loc.getColumn()
632 } else if (const ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D)) {
634 // FIXME: copy-pasted from CGDebugInfo.cpp.
635 OS << (OMD->isInstanceMethod() ? '-' : '+') << '[';
636 const DeclContext *DC = OMD->getDeclContext();
637 if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) {
638 OS << OID->getName();
639 } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) {
640 OS << OID->getName();
641 } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) {
642 if (OC->IsClassExtension()) {
643 OS << OC->getClassInterface()->getName();
645 OS << OC->getIdentifier()->getNameStart() << '('
646 << OC->getIdentifier()->getNameStart() << ')';
648 } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) {
649 OS << OCD->getClassInterface()->getName() << '('
650 << OCD->getName() << ')';
651 } else if (isa<ObjCProtocolDecl>(DC)) {
652 // We can extract the type of the class from the self pointer.
653 if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) {
655 cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType();
656 ClassTy.print(OS, PrintingPolicy(LangOptions()));
659 OS << ' ' << OMD->getSelector().getAsString() << ']';
666 AnalysisConsumer::AnalysisMode
667 AnalysisConsumer::getModeForDecl(Decl *D, AnalysisMode Mode) {
668 if (!Opts->AnalyzeSpecificFunction.empty() &&
669 getFunctionName(D) != Opts->AnalyzeSpecificFunction)
672 // Unless -analyze-all is specified, treat decls differently depending on
673 // where they came from:
674 // - Main source file: run both path-sensitive and non-path-sensitive checks.
675 // - Header files: run non-path-sensitive checks only.
676 // - System headers: don't run any checks.
677 SourceManager &SM = Ctx->getSourceManager();
678 const Stmt *Body = D->getBody();
679 SourceLocation SL = Body ? Body->getBeginLoc() : D->getLocation();
680 SL = SM.getExpansionLoc(SL);
682 if (!Opts->AnalyzeAll && !Mgr->isInCodeFile(SL)) {
683 if (SL.isInvalid() || SM.isInSystemHeader(SL))
685 return Mode & ~AM_Path;
691 void AnalysisConsumer::HandleCode(Decl *D, AnalysisMode Mode,
692 ExprEngine::InliningModes IMode,
693 SetOfConstDecls *VisitedCallees) {
696 Mode = getModeForDecl(D, Mode);
700 // Clear the AnalysisManager of old AnalysisDeclContexts.
701 Mgr->ClearContexts();
702 // Ignore autosynthesized code.
703 if (Mgr->getAnalysisDeclContext(D)->isBodyAutosynthesized())
706 DisplayFunction(D, Mode, IMode);
707 CFG *DeclCFG = Mgr->getCFG(D);
709 MaxCFGSize.updateMax(DeclCFG->size());
711 BugReporter BR(*Mgr);
713 if (Mode & AM_Syntax)
714 checkerMgr->runCheckersOnASTBody(D, *Mgr, BR);
715 if ((Mode & AM_Path) && checkerMgr->hasPathSensitiveCheckers()) {
716 RunPathSensitiveChecks(D, IMode, VisitedCallees);
717 if (IMode != ExprEngine::Inline_Minimal)
718 NumFunctionsAnalyzed++;
722 //===----------------------------------------------------------------------===//
723 // Path-sensitive checking.
724 //===----------------------------------------------------------------------===//
726 void AnalysisConsumer::RunPathSensitiveChecks(Decl *D,
727 ExprEngine::InliningModes IMode,
728 SetOfConstDecls *VisitedCallees) {
729 // Construct the analysis engine. First check if the CFG is valid.
730 // FIXME: Inter-procedural analysis will need to handle invalid CFGs.
734 // See if the LiveVariables analysis scales.
735 if (!Mgr->getAnalysisDeclContext(D)->getAnalysis<RelaxedLiveVariables>())
738 ExprEngine Eng(CTU, *Mgr, VisitedCallees, &FunctionSummaries, IMode);
740 // Execute the worklist algorithm.
741 Eng.ExecuteWorkList(Mgr->getAnalysisDeclContextManager().getStackFrame(D),
742 Mgr->options.MaxNodesPerTopLevelFunction);
744 if (!Mgr->options.DumpExplodedGraphTo.empty())
745 Eng.DumpGraph(Mgr->options.TrimGraph, Mgr->options.DumpExplodedGraphTo);
747 // Visualize the exploded graph.
748 if (Mgr->options.visualizeExplodedGraphWithGraphViz)
749 Eng.ViewGraph(Mgr->options.TrimGraph);
752 Eng.getBugReporter().FlushReports();
755 //===----------------------------------------------------------------------===//
756 // AnalysisConsumer creation.
757 //===----------------------------------------------------------------------===//
759 std::unique_ptr<AnalysisASTConsumer>
760 ento::CreateAnalysisConsumer(CompilerInstance &CI) {
761 // Disable the effects of '-Werror' when using the AnalysisConsumer.
762 CI.getPreprocessor().getDiagnostics().setWarningsAsErrors(false);
764 AnalyzerOptionsRef analyzerOpts = CI.getAnalyzerOpts();
765 bool hasModelPath = analyzerOpts->Config.count("model-path") > 0;
767 return llvm::make_unique<AnalysisConsumer>(
768 CI, CI.getFrontendOpts().OutputFile, analyzerOpts,
769 CI.getFrontendOpts().Plugins,
770 hasModelPath ? new ModelInjector(CI) : nullptr);