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Diffstat (limited to 'contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp | 833 |
1 files changed, 0 insertions, 833 deletions
diff --git a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp b/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp deleted file mode 100644 index 454b61fd51a1..000000000000 --- a/contrib/llvm/tools/clang/lib/StaticAnalyzer/Frontend/AnalysisConsumer.cpp +++ /dev/null @@ -1,833 +0,0 @@ -//===--- AnalysisConsumer.cpp - ASTConsumer for running Analyses ----------===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// -// -// "Meta" ASTConsumer for running different source analyses. -// -//===----------------------------------------------------------------------===// - -#include "clang/StaticAnalyzer/Frontend/AnalysisConsumer.h" -#include "ModelInjector.h" -#include "clang/AST/Decl.h" -#include "clang/AST/DeclCXX.h" -#include "clang/AST/DeclObjC.h" -#include "clang/AST/RecursiveASTVisitor.h" -#include "clang/Analysis/Analyses/LiveVariables.h" -#include "clang/Analysis/CFG.h" -#include "clang/Analysis/CallGraph.h" -#include "clang/Analysis/CodeInjector.h" -#include "clang/Basic/SourceManager.h" -#include "clang/CrossTU/CrossTranslationUnit.h" -#include "clang/Frontend/CompilerInstance.h" -#include "clang/Lex/Preprocessor.h" -#include "clang/StaticAnalyzer/Checkers/LocalCheckers.h" -#include "clang/StaticAnalyzer/Core/AnalyzerOptions.h" -#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h" -#include "clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h" -#include "clang/StaticAnalyzer/Core/CheckerManager.h" -#include "clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h" -#include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h" -#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" -#include "clang/StaticAnalyzer/Frontend/CheckerRegistration.h" -#include "llvm/ADT/PostOrderIterator.h" -#include "llvm/ADT/Statistic.h" -#include "llvm/Support/FileSystem.h" -#include "llvm/Support/Path.h" -#include "llvm/Support/Program.h" -#include "llvm/Support/Timer.h" -#include "llvm/Support/raw_ostream.h" -#include <memory> -#include <queue> -#include <utility> - -using namespace clang; -using namespace ento; - -#define DEBUG_TYPE "AnalysisConsumer" - -STATISTIC(NumFunctionTopLevel, "The # of functions at top level."); -STATISTIC(NumFunctionsAnalyzed, - "The # of functions and blocks analyzed (as top level " - "with inlining turned on)."); -STATISTIC(NumBlocksInAnalyzedFunctions, - "The # of basic blocks in the analyzed functions."); -STATISTIC(NumVisitedBlocksInAnalyzedFunctions, - "The # of visited basic blocks in the analyzed functions."); -STATISTIC(PercentReachableBlocks, "The % of reachable basic blocks."); -STATISTIC(MaxCFGSize, "The maximum number of basic blocks in a function."); - -//===----------------------------------------------------------------------===// -// Special PathDiagnosticConsumers. -//===----------------------------------------------------------------------===// - -void ento::createPlistHTMLDiagnosticConsumer(AnalyzerOptions &AnalyzerOpts, - PathDiagnosticConsumers &C, - const std::string &prefix, - const Preprocessor &PP) { - createHTMLDiagnosticConsumer(AnalyzerOpts, C, - llvm::sys::path::parent_path(prefix), PP); - createPlistMultiFileDiagnosticConsumer(AnalyzerOpts, C, prefix, PP); -} - -void ento::createTextPathDiagnosticConsumer(AnalyzerOptions &AnalyzerOpts, - PathDiagnosticConsumers &C, - const std::string &Prefix, - const clang::Preprocessor &PP) { - llvm_unreachable("'text' consumer should be enabled on ClangDiags"); -} - -namespace { -class ClangDiagPathDiagConsumer : public PathDiagnosticConsumer { - DiagnosticsEngine &Diag; - bool IncludePath, ShouldEmitAsError; - -public: - ClangDiagPathDiagConsumer(DiagnosticsEngine &Diag) - : Diag(Diag), IncludePath(false), ShouldEmitAsError(false) {} - ~ClangDiagPathDiagConsumer() override {} - StringRef getName() const override { return "ClangDiags"; } - - bool supportsLogicalOpControlFlow() const override { return true; } - bool supportsCrossFileDiagnostics() const override { return true; } - - PathGenerationScheme getGenerationScheme() const override { - return IncludePath ? Minimal : None; - } - - void enablePaths() { - IncludePath = true; - } - - void enableWerror() { ShouldEmitAsError = true; } - - void FlushDiagnosticsImpl(std::vector<const PathDiagnostic *> &Diags, - FilesMade *filesMade) override { - unsigned WarnID = - ShouldEmitAsError - ? Diag.getCustomDiagID(DiagnosticsEngine::Error, "%0") - : Diag.getCustomDiagID(DiagnosticsEngine::Warning, "%0"); - unsigned NoteID = Diag.getCustomDiagID(DiagnosticsEngine::Note, "%0"); - - for (std::vector<const PathDiagnostic*>::iterator I = Diags.begin(), - E = Diags.end(); I != E; ++I) { - const PathDiagnostic *PD = *I; - SourceLocation WarnLoc = PD->getLocation().asLocation(); - Diag.Report(WarnLoc, WarnID) << PD->getShortDescription() - << PD->path.back()->getRanges(); - - // First, add extra notes, even if paths should not be included. - for (const auto &Piece : PD->path) { - if (!isa<PathDiagnosticNotePiece>(Piece.get())) - continue; - - SourceLocation NoteLoc = Piece->getLocation().asLocation(); - Diag.Report(NoteLoc, NoteID) << Piece->getString() - << Piece->getRanges(); - } - - if (!IncludePath) - continue; - - // Then, add the path notes if necessary. - PathPieces FlatPath = PD->path.flatten(/*ShouldFlattenMacros=*/true); - for (const auto &Piece : FlatPath) { - if (isa<PathDiagnosticNotePiece>(Piece.get())) - continue; - - SourceLocation NoteLoc = Piece->getLocation().asLocation(); - Diag.Report(NoteLoc, NoteID) << Piece->getString() - << Piece->getRanges(); - } - } - } -}; -} // end anonymous namespace - -//===----------------------------------------------------------------------===// -// AnalysisConsumer declaration. -//===----------------------------------------------------------------------===// - -namespace { - -class AnalysisConsumer : public AnalysisASTConsumer, - public RecursiveASTVisitor<AnalysisConsumer> { - enum { - AM_None = 0, - AM_Syntax = 0x1, - AM_Path = 0x2 - }; - typedef unsigned AnalysisMode; - - /// Mode of the analyzes while recursively visiting Decls. - AnalysisMode RecVisitorMode; - /// Bug Reporter to use while recursively visiting Decls. - BugReporter *RecVisitorBR; - - std::vector<std::function<void(CheckerRegistry &)>> CheckerRegistrationFns; - -public: - ASTContext *Ctx; - const Preprocessor &PP; - const std::string OutDir; - AnalyzerOptionsRef Opts; - ArrayRef<std::string> Plugins; - CodeInjector *Injector; - cross_tu::CrossTranslationUnitContext CTU; - - /// Stores the declarations from the local translation unit. - /// Note, we pre-compute the local declarations at parse time as an - /// optimization to make sure we do not deserialize everything from disk. - /// The local declaration to all declarations ratio might be very small when - /// working with a PCH file. - SetOfDecls LocalTUDecls; - - // Set of PathDiagnosticConsumers. Owned by AnalysisManager. - PathDiagnosticConsumers PathConsumers; - - StoreManagerCreator CreateStoreMgr; - ConstraintManagerCreator CreateConstraintMgr; - - std::unique_ptr<CheckerManager> checkerMgr; - std::unique_ptr<AnalysisManager> Mgr; - - /// Time the analyzes time of each translation unit. - std::unique_ptr<llvm::TimerGroup> AnalyzerTimers; - std::unique_ptr<llvm::Timer> SyntaxCheckTimer; - std::unique_ptr<llvm::Timer> ExprEngineTimer; - std::unique_ptr<llvm::Timer> BugReporterTimer; - - /// The information about analyzed functions shared throughout the - /// translation unit. - FunctionSummariesTy FunctionSummaries; - - AnalysisConsumer(CompilerInstance &CI, const std::string &outdir, - AnalyzerOptionsRef opts, ArrayRef<std::string> plugins, - CodeInjector *injector) - : RecVisitorMode(0), RecVisitorBR(nullptr), Ctx(nullptr), - PP(CI.getPreprocessor()), OutDir(outdir), Opts(std::move(opts)), - Plugins(plugins), Injector(injector), CTU(CI) { - DigestAnalyzerOptions(); - if (Opts->PrintStats || Opts->ShouldSerializeStats) { - AnalyzerTimers = llvm::make_unique<llvm::TimerGroup>( - "analyzer", "Analyzer timers"); - SyntaxCheckTimer = llvm::make_unique<llvm::Timer>( - "syntaxchecks", "Syntax-based analysis time", *AnalyzerTimers); - ExprEngineTimer = llvm::make_unique<llvm::Timer>( - "exprengine", "Path exploration time", *AnalyzerTimers); - BugReporterTimer = llvm::make_unique<llvm::Timer>( - "bugreporter", "Path-sensitive report post-processing time", - *AnalyzerTimers); - llvm::EnableStatistics(/* PrintOnExit= */ false); - } - } - - ~AnalysisConsumer() override { - if (Opts->PrintStats) { - llvm::PrintStatistics(); - } - } - - void DigestAnalyzerOptions() { - if (Opts->AnalysisDiagOpt != PD_NONE) { - // Create the PathDiagnosticConsumer. - ClangDiagPathDiagConsumer *clangDiags = - new ClangDiagPathDiagConsumer(PP.getDiagnostics()); - PathConsumers.push_back(clangDiags); - - if (Opts->AnalyzerWerror) - clangDiags->enableWerror(); - - if (Opts->AnalysisDiagOpt == PD_TEXT) { - clangDiags->enablePaths(); - - } else if (!OutDir.empty()) { - switch (Opts->AnalysisDiagOpt) { - default: -#define ANALYSIS_DIAGNOSTICS(NAME, CMDFLAG, DESC, CREATEFN) \ - case PD_##NAME: \ - CREATEFN(*Opts.get(), PathConsumers, OutDir, PP); \ - break; -#include "clang/StaticAnalyzer/Core/Analyses.def" - } - } - } - - // 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/StaticAnalyzer/Core/Analyses.def" - } - - switch (Opts->AnalysisConstraintsOpt) { - default: - llvm_unreachable("Unknown constraint manager."); -#define ANALYSIS_CONSTRAINTS(NAME, CMDFLAG, DESC, CREATEFN) \ - case NAME##Model: CreateConstraintMgr = CREATEFN; break; -#include "clang/StaticAnalyzer/Core/Analyses.def" - } - } - - void DisplayFunction(const Decl *D, AnalysisMode Mode, - ExprEngine::InliningModes IMode) { - if (!Opts->AnalyzerDisplayProgress) - return; - - SourceManager &SM = Mgr->getASTContext().getSourceManager(); - PresumedLoc Loc = SM.getPresumedLoc(D->getLocation()); - if (Loc.isValid()) { - llvm::errs() << "ANALYZE"; - - if (Mode == AM_Syntax) - llvm::errs() << " (Syntax)"; - else if (Mode == AM_Path) { - llvm::errs() << " (Path, "; - switch (IMode) { - case ExprEngine::Inline_Minimal: - llvm::errs() << " Inline_Minimal"; - break; - case ExprEngine::Inline_Regular: - llvm::errs() << " Inline_Regular"; - break; - } - llvm::errs() << ")"; - } - else - assert(Mode == (AM_Syntax | AM_Path) && "Unexpected mode!"); - - llvm::errs() << ": " << Loc.getFilename() << ' ' - << getFunctionName(D) << '\n'; - } - } - - void Initialize(ASTContext &Context) override { - Ctx = &Context; - checkerMgr = createCheckerManager( - *Ctx, *Opts, Plugins, CheckerRegistrationFns, PP.getDiagnostics()); - - Mgr = llvm::make_unique<AnalysisManager>( - *Ctx, PP.getDiagnostics(), PathConsumers, CreateStoreMgr, - CreateConstraintMgr, checkerMgr.get(), *Opts, Injector); - } - - /// Store the top level decls in the set to be processed later on. - /// (Doing this pre-processing avoids deserialization of data from PCH.) - bool HandleTopLevelDecl(DeclGroupRef D) override; - void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override; - - void HandleTranslationUnit(ASTContext &C) override; - - /// Determine which inlining mode should be used when this function is - /// analyzed. This allows to redefine the default inlining policies when - /// analyzing a given function. - ExprEngine::InliningModes - getInliningModeForFunction(const Decl *D, const SetOfConstDecls &Visited); - - /// Build the call graph for all the top level decls of this TU and - /// use it to define the order in which the functions should be visited. - void HandleDeclsCallGraph(const unsigned LocalTUDeclsSize); - - /// Run analyzes(syntax or path sensitive) on the given function. - /// \param Mode - determines if we are requesting syntax only or path - /// sensitive only analysis. - /// \param VisitedCallees - The output parameter, which is populated with the - /// set of functions which should be considered analyzed after analyzing the - /// given root function. - void HandleCode(Decl *D, AnalysisMode Mode, - ExprEngine::InliningModes IMode = ExprEngine::Inline_Minimal, - SetOfConstDecls *VisitedCallees = nullptr); - - void RunPathSensitiveChecks(Decl *D, - ExprEngine::InliningModes IMode, - SetOfConstDecls *VisitedCallees); - - /// Visitors for the RecursiveASTVisitor. - bool shouldWalkTypesOfTypeLocs() const { return false; } - - /// Handle callbacks for arbitrary Decls. - bool VisitDecl(Decl *D) { - AnalysisMode Mode = getModeForDecl(D, RecVisitorMode); - if (Mode & AM_Syntax) { - if (SyntaxCheckTimer) - SyntaxCheckTimer->startTimer(); - checkerMgr->runCheckersOnASTDecl(D, *Mgr, *RecVisitorBR); - if (SyntaxCheckTimer) - SyntaxCheckTimer->stopTimer(); - } - return true; - } - - bool VisitVarDecl(VarDecl *VD) { - if (!Opts->IsNaiveCTUEnabled) - return true; - - if (VD->hasExternalStorage() || VD->isStaticDataMember()) { - if (!cross_tu::containsConst(VD, *Ctx)) - return true; - } else { - // Cannot be initialized in another TU. - return true; - } - - if (VD->getAnyInitializer()) - return true; - - llvm::Expected<const VarDecl *> CTUDeclOrError = - CTU.getCrossTUDefinition(VD, Opts->CTUDir, Opts->CTUIndexName, - Opts->DisplayCTUProgress); - - if (!CTUDeclOrError) { - handleAllErrors(CTUDeclOrError.takeError(), - [&](const cross_tu::IndexError &IE) { - CTU.emitCrossTUDiagnostics(IE); - }); - } - - return true; - } - - bool VisitFunctionDecl(FunctionDecl *FD) { - IdentifierInfo *II = FD->getIdentifier(); - if (II && II->getName().startswith("__inline")) - return true; - - // We skip function template definitions, as their semantics is - // only determined when they are instantiated. - if (FD->isThisDeclarationADefinition() && - !FD->isDependentContext()) { - assert(RecVisitorMode == AM_Syntax || Mgr->shouldInlineCall() == false); - HandleCode(FD, RecVisitorMode); - } - return true; - } - - bool VisitObjCMethodDecl(ObjCMethodDecl *MD) { - if (MD->isThisDeclarationADefinition()) { - assert(RecVisitorMode == AM_Syntax || Mgr->shouldInlineCall() == false); - HandleCode(MD, RecVisitorMode); - } - return true; - } - - bool VisitBlockDecl(BlockDecl *BD) { - if (BD->hasBody()) { - assert(RecVisitorMode == AM_Syntax || Mgr->shouldInlineCall() == false); - // Since we skip function template definitions, we should skip blocks - // declared in those functions as well. - if (!BD->isDependentContext()) { - HandleCode(BD, RecVisitorMode); - } - } - return true; - } - - void AddDiagnosticConsumer(PathDiagnosticConsumer *Consumer) override { - PathConsumers.push_back(Consumer); - } - - void AddCheckerRegistrationFn(std::function<void(CheckerRegistry&)> Fn) override { - CheckerRegistrationFns.push_back(std::move(Fn)); - } - -private: - void storeTopLevelDecls(DeclGroupRef DG); - std::string getFunctionName(const Decl *D); - - /// Check if we should skip (not analyze) the given function. - AnalysisMode getModeForDecl(Decl *D, AnalysisMode Mode); - void runAnalysisOnTranslationUnit(ASTContext &C); - - /// Print \p S to stderr if \c Opts->AnalyzerDisplayProgress is set. - void reportAnalyzerProgress(StringRef S); -}; -} // end anonymous namespace - - -//===----------------------------------------------------------------------===// -// AnalysisConsumer implementation. -//===----------------------------------------------------------------------===// -bool AnalysisConsumer::HandleTopLevelDecl(DeclGroupRef DG) { - storeTopLevelDecls(DG); - return true; -} - -void AnalysisConsumer::HandleTopLevelDeclInObjCContainer(DeclGroupRef DG) { - storeTopLevelDecls(DG); -} - -void AnalysisConsumer::storeTopLevelDecls(DeclGroupRef DG) { - for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I) { - - // Skip ObjCMethodDecl, wait for the objc container to avoid - // analyzing twice. - if (isa<ObjCMethodDecl>(*I)) - continue; - - LocalTUDecls.push_back(*I); - } -} - -static bool shouldSkipFunction(const Decl *D, - const SetOfConstDecls &Visited, - const SetOfConstDecls &VisitedAsTopLevel) { - if (VisitedAsTopLevel.count(D)) - return true; - - // We want to re-analyse the functions as top level in the following cases: - // - The 'init' methods should be reanalyzed because - // ObjCNonNilReturnValueChecker assumes that '[super init]' never returns - // 'nil' and unless we analyze the 'init' functions as top level, we will - // not catch errors within defensive code. - // - We want to reanalyze all ObjC methods as top level to report Retain - // Count naming convention errors more aggressively. - if (isa<ObjCMethodDecl>(D)) - return false; - // We also want to reanalyze all C++ copy and move assignment operators to - // separately check the two cases where 'this' aliases with the parameter and - // where it may not. (cplusplus.SelfAssignmentChecker) - if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) { - if (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) - return false; - } - - // Otherwise, if we visited the function before, do not reanalyze it. - return Visited.count(D); -} - -ExprEngine::InliningModes -AnalysisConsumer::getInliningModeForFunction(const Decl *D, - const SetOfConstDecls &Visited) { - // We want to reanalyze all ObjC methods as top level to report Retain - // Count naming convention errors more aggressively. But we should tune down - // inlining when reanalyzing an already inlined function. - if (Visited.count(D) && isa<ObjCMethodDecl>(D)) { - const ObjCMethodDecl *ObjCM = cast<ObjCMethodDecl>(D); - if (ObjCM->getMethodFamily() != OMF_init) - return ExprEngine::Inline_Minimal; - } - - return ExprEngine::Inline_Regular; -} - -void AnalysisConsumer::HandleDeclsCallGraph(const unsigned LocalTUDeclsSize) { - // Build the Call Graph by adding all the top level declarations to the graph. - // Note: CallGraph can trigger deserialization of more items from a pch - // (though HandleInterestingDecl); triggering additions to LocalTUDecls. - // We rely on random access to add the initially processed Decls to CG. - CallGraph CG; - for (unsigned i = 0 ; i < LocalTUDeclsSize ; ++i) { - CG.addToCallGraph(LocalTUDecls[i]); - } - - // Walk over all of the call graph nodes in topological order, so that we - // analyze parents before the children. Skip the functions inlined into - // the previously processed functions. Use external Visited set to identify - // inlined functions. The topological order allows the "do not reanalyze - // previously inlined function" performance heuristic to be triggered more - // often. - SetOfConstDecls Visited; - SetOfConstDecls VisitedAsTopLevel; - llvm::ReversePostOrderTraversal<clang::CallGraph*> RPOT(&CG); - for (llvm::ReversePostOrderTraversal<clang::CallGraph*>::rpo_iterator - I = RPOT.begin(), E = RPOT.end(); I != E; ++I) { - NumFunctionTopLevel++; - - CallGraphNode *N = *I; - Decl *D = N->getDecl(); - - // Skip the abstract root node. - if (!D) - continue; - - // Skip the functions which have been processed already or previously - // inlined. - if (shouldSkipFunction(D, Visited, VisitedAsTopLevel)) - continue; - - // Analyze the function. - SetOfConstDecls VisitedCallees; - - HandleCode(D, AM_Path, getInliningModeForFunction(D, Visited), - (Mgr->options.InliningMode == All ? nullptr : &VisitedCallees)); - - // Add the visited callees to the global visited set. - for (const Decl *Callee : VisitedCallees) - // Decls from CallGraph are already canonical. But Decls coming from - // CallExprs may be not. We should canonicalize them manually. - Visited.insert(isa<ObjCMethodDecl>(Callee) ? Callee - : Callee->getCanonicalDecl()); - VisitedAsTopLevel.insert(D); - } -} - -static bool isBisonFile(ASTContext &C) { - const SourceManager &SM = C.getSourceManager(); - FileID FID = SM.getMainFileID(); - StringRef Buffer = SM.getBuffer(FID)->getBuffer(); - if (Buffer.startswith("/* A Bison parser, made by")) - return true; - return false; -} - -void AnalysisConsumer::runAnalysisOnTranslationUnit(ASTContext &C) { - BugReporter BR(*Mgr); - TranslationUnitDecl *TU = C.getTranslationUnitDecl(); - if (SyntaxCheckTimer) - SyntaxCheckTimer->startTimer(); - checkerMgr->runCheckersOnASTDecl(TU, *Mgr, BR); - if (SyntaxCheckTimer) - SyntaxCheckTimer->stopTimer(); - - // Run the AST-only checks using the order in which functions are defined. - // If inlining is not turned on, use the simplest function order for path - // sensitive analyzes as well. - RecVisitorMode = AM_Syntax; - if (!Mgr->shouldInlineCall()) - RecVisitorMode |= AM_Path; - RecVisitorBR = &BR; - - // Process all the top level declarations. - // - // Note: TraverseDecl may modify LocalTUDecls, but only by appending more - // entries. Thus we don't use an iterator, but rely on LocalTUDecls - // random access. By doing so, we automatically compensate for iterators - // possibly being invalidated, although this is a bit slower. - const unsigned LocalTUDeclsSize = LocalTUDecls.size(); - for (unsigned i = 0 ; i < LocalTUDeclsSize ; ++i) { - TraverseDecl(LocalTUDecls[i]); - } - - if (Mgr->shouldInlineCall()) - HandleDeclsCallGraph(LocalTUDeclsSize); - - // After all decls handled, run checkers on the entire TranslationUnit. - checkerMgr->runCheckersOnEndOfTranslationUnit(TU, *Mgr, BR); - - RecVisitorBR = nullptr; -} - -void AnalysisConsumer::reportAnalyzerProgress(StringRef S) { - if (Opts->AnalyzerDisplayProgress) - llvm::errs() << S; -} - -void AnalysisConsumer::HandleTranslationUnit(ASTContext &C) { - - // Don't run the actions if an error has occurred with parsing the file. - DiagnosticsEngine &Diags = PP.getDiagnostics(); - if (Diags.hasErrorOccurred() || Diags.hasFatalErrorOccurred()) - return; - - if (isBisonFile(C)) { - reportAnalyzerProgress("Skipping bison-generated file\n"); - } else if (Opts->DisableAllChecks) { - - // Don't analyze if the user explicitly asked for no checks to be performed - // on this file. - reportAnalyzerProgress("All checks are disabled using a supplied option\n"); - } else { - // Otherwise, just run the analysis. - runAnalysisOnTranslationUnit(C); - } - - // Count how many basic blocks we have not covered. - NumBlocksInAnalyzedFunctions = FunctionSummaries.getTotalNumBasicBlocks(); - NumVisitedBlocksInAnalyzedFunctions = - FunctionSummaries.getTotalNumVisitedBasicBlocks(); - if (NumBlocksInAnalyzedFunctions > 0) - PercentReachableBlocks = - (FunctionSummaries.getTotalNumVisitedBasicBlocks() * 100) / - NumBlocksInAnalyzedFunctions; - - // 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(); -} - -std::string AnalysisConsumer::getFunctionName(const Decl *D) { - std::string Str; - llvm::raw_string_ostream OS(Str); - - if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { - OS << FD->getQualifiedNameAsString(); - - // In C++, there are overloads. - if (Ctx->getLangOpts().CPlusPlus) { - OS << '('; - for (const auto &P : FD->parameters()) { - if (P != *FD->param_begin()) - OS << ", "; - OS << P->getType().getAsString(); - } - OS << ')'; - } - - } else if (isa<BlockDecl>(D)) { - PresumedLoc Loc = Ctx->getSourceManager().getPresumedLoc(D->getLocation()); - - if (Loc.isValid()) { - OS << "block (line: " << Loc.getLine() << ", col: " << Loc.getColumn() - << ')'; - } - - } else if (const ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D)) { - - // FIXME: copy-pasted from CGDebugInfo.cpp. - OS << (OMD->isInstanceMethod() ? '-' : '+') << '['; - const DeclContext *DC = OMD->getDeclContext(); - if (const auto *OID = dyn_cast<ObjCImplementationDecl>(DC)) { - OS << OID->getName(); - } else if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(DC)) { - OS << OID->getName(); - } else if (const auto *OC = dyn_cast<ObjCCategoryDecl>(DC)) { - if (OC->IsClassExtension()) { - OS << OC->getClassInterface()->getName(); - } else { - OS << OC->getIdentifier()->getNameStart() << '(' - << OC->getIdentifier()->getNameStart() << ')'; - } - } else if (const auto *OCD = dyn_cast<ObjCCategoryImplDecl>(DC)) { - OS << OCD->getClassInterface()->getName() << '(' - << OCD->getName() << ')'; - } else if (isa<ObjCProtocolDecl>(DC)) { - // We can extract the type of the class from the self pointer. - if (ImplicitParamDecl *SelfDecl = OMD->getSelfDecl()) { - QualType ClassTy = - cast<ObjCObjectPointerType>(SelfDecl->getType())->getPointeeType(); - ClassTy.print(OS, PrintingPolicy(LangOptions())); - } - } - OS << ' ' << OMD->getSelector().getAsString() << ']'; - - } - - return OS.str(); -} - -AnalysisConsumer::AnalysisMode -AnalysisConsumer::getModeForDecl(Decl *D, AnalysisMode Mode) { - if (!Opts->AnalyzeSpecificFunction.empty() && - getFunctionName(D) != Opts->AnalyzeSpecificFunction) - return AM_None; - - // Unless -analyze-all is specified, treat decls differently depending on - // where they came from: - // - Main source file: run both path-sensitive and non-path-sensitive checks. - // - Header files: run non-path-sensitive checks only. - // - System headers: don't run any checks. - SourceManager &SM = Ctx->getSourceManager(); - const Stmt *Body = D->getBody(); - SourceLocation SL = Body ? Body->getBeginLoc() : D->getLocation(); - SL = SM.getExpansionLoc(SL); - - if (!Opts->AnalyzeAll && !Mgr->isInCodeFile(SL)) { - if (SL.isInvalid() || SM.isInSystemHeader(SL)) - return AM_None; - return Mode & ~AM_Path; - } - - return Mode; -} - -void AnalysisConsumer::HandleCode(Decl *D, AnalysisMode Mode, - ExprEngine::InliningModes IMode, - SetOfConstDecls *VisitedCallees) { - if (!D->hasBody()) - return; - Mode = getModeForDecl(D, Mode); - if (Mode == AM_None) - return; - - // Clear the AnalysisManager of old AnalysisDeclContexts. - Mgr->ClearContexts(); - // Ignore autosynthesized code. - if (Mgr->getAnalysisDeclContext(D)->isBodyAutosynthesized()) - return; - - DisplayFunction(D, Mode, IMode); - CFG *DeclCFG = Mgr->getCFG(D); - if (DeclCFG) - MaxCFGSize.updateMax(DeclCFG->size()); - - BugReporter BR(*Mgr); - - if (Mode & AM_Syntax) { - if (SyntaxCheckTimer) - SyntaxCheckTimer->startTimer(); - checkerMgr->runCheckersOnASTBody(D, *Mgr, BR); - if (SyntaxCheckTimer) - SyntaxCheckTimer->stopTimer(); - } - if ((Mode & AM_Path) && checkerMgr->hasPathSensitiveCheckers()) { - RunPathSensitiveChecks(D, IMode, VisitedCallees); - if (IMode != ExprEngine::Inline_Minimal) - NumFunctionsAnalyzed++; - } -} - -//===----------------------------------------------------------------------===// -// Path-sensitive checking. -//===----------------------------------------------------------------------===// - -void AnalysisConsumer::RunPathSensitiveChecks(Decl *D, - ExprEngine::InliningModes IMode, - SetOfConstDecls *VisitedCallees) { - // 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; - - // See if the LiveVariables analysis scales. - if (!Mgr->getAnalysisDeclContext(D)->getAnalysis<RelaxedLiveVariables>()) - return; - - ExprEngine Eng(CTU, *Mgr, VisitedCallees, &FunctionSummaries, IMode); - - // Execute the worklist algorithm. - if (ExprEngineTimer) - ExprEngineTimer->startTimer(); - Eng.ExecuteWorkList(Mgr->getAnalysisDeclContextManager().getStackFrame(D), - Mgr->options.MaxNodesPerTopLevelFunction); - if (ExprEngineTimer) - ExprEngineTimer->stopTimer(); - - if (!Mgr->options.DumpExplodedGraphTo.empty()) - Eng.DumpGraph(Mgr->options.TrimGraph, Mgr->options.DumpExplodedGraphTo); - - // Visualize the exploded graph. - if (Mgr->options.visualizeExplodedGraphWithGraphViz) - Eng.ViewGraph(Mgr->options.TrimGraph); - - // Display warnings. - if (BugReporterTimer) - BugReporterTimer->startTimer(); - Eng.getBugReporter().FlushReports(); - if (BugReporterTimer) - BugReporterTimer->stopTimer(); -} - -//===----------------------------------------------------------------------===// -// AnalysisConsumer creation. -//===----------------------------------------------------------------------===// - -std::unique_ptr<AnalysisASTConsumer> -ento::CreateAnalysisConsumer(CompilerInstance &CI) { - // Disable the effects of '-Werror' when using the AnalysisConsumer. - CI.getPreprocessor().getDiagnostics().setWarningsAsErrors(false); - - AnalyzerOptionsRef analyzerOpts = CI.getAnalyzerOpts(); - bool hasModelPath = analyzerOpts->Config.count("model-path") > 0; - - return llvm::make_unique<AnalysisConsumer>( - CI, CI.getFrontendOpts().OutputFile, analyzerOpts, - CI.getFrontendOpts().Plugins, - hasModelPath ? new ModelInjector(CI) : nullptr); -} |