124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
//==--AnalyzerStatsChecker.cpp - Analyzer visitation statistics --*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// This file reports various statistics about analyzer visitation.
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//===----------------------------------------------------------------------===//
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#include "clang/StaticAnalyzer/PathSensitive/CheckerVisitor.h"
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#include "clang/StaticAnalyzer/PathSensitive/ExplodedGraph.h"
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#include "clang/StaticAnalyzer/BugReporter/BugReporter.h"
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// FIXME: Restructure checker registration.
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#include "Checkers/ExprEngineExperimentalChecks.h"
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#include "clang/Basic/SourceManager.h"
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#include "llvm/ADT/SmallPtrSet.h"
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using namespace clang;
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using namespace ento;
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namespace {
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class AnalyzerStatsChecker : public CheckerVisitor<AnalyzerStatsChecker> {
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public:
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static void *getTag();
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void VisitEndAnalysis(ExplodedGraph &G, BugReporter &B, ExprEngine &Eng);
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private:
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llvm::SmallPtrSet<const CFGBlock*, 256> reachable;
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};
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}
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void *AnalyzerStatsChecker::getTag() {
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static int x = 0;
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return &x;
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}
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void ento::RegisterAnalyzerStatsChecker(ExprEngine &Eng) {
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Eng.registerCheck(new AnalyzerStatsChecker());
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}
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void AnalyzerStatsChecker::VisitEndAnalysis(ExplodedGraph &G,
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BugReporter &B,
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ExprEngine &Eng) {
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const CFG *C = 0;
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const Decl *D = 0;
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const LocationContext *LC = 0;
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const SourceManager &SM = B.getSourceManager();
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// Iterate over explodedgraph
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for (ExplodedGraph::node_iterator I = G.nodes_begin();
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I != G.nodes_end(); ++I) {
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const ProgramPoint &P = I->getLocation();
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// Save the LocationContext if we don't have it already
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if (!LC)
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LC = P.getLocationContext();
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if (const BlockEntrance *BE = dyn_cast<BlockEntrance>(&P)) {
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const CFGBlock *CB = BE->getBlock();
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reachable.insert(CB);
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}
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}
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// Get the CFG and the Decl of this block
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C = LC->getCFG();
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D = LC->getAnalysisContext()->getDecl();
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unsigned total = 0, unreachable = 0;
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// Find CFGBlocks that were not covered by any node
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for (CFG::const_iterator I = C->begin(); I != C->end(); ++I) {
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const CFGBlock *CB = *I;
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++total;
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// Check if the block is unreachable
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if (!reachable.count(CB)) {
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++unreachable;
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}
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}
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// We never 'reach' the entry block, so correct the unreachable count
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unreachable--;
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// Generate the warning string
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llvm::SmallString<128> buf;
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llvm::raw_svector_ostream output(buf);
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PresumedLoc Loc = SM.getPresumedLoc(D->getLocation());
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if (Loc.isValid()) {
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output << Loc.getFilename() << " : ";
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if (isa<FunctionDecl>(D) || isa<ObjCMethodDecl>(D)) {
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const NamedDecl *ND = cast<NamedDecl>(D);
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output << ND;
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}
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else if (isa<BlockDecl>(D)) {
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output << "block(line:" << Loc.getLine() << ":col:" << Loc.getColumn();
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}
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}
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output << " -> Total CFGBlocks: " << total << " | Unreachable CFGBlocks: "
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<< unreachable << " | Aborted Block: "
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<< (Eng.wasBlockAborted() ? "yes" : "no")
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<< " | Empty WorkList: "
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<< (Eng.hasEmptyWorkList() ? "yes" : "no");
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B.EmitBasicReport("Analyzer Statistics", "Internal Statistics", output.str(),
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D->getLocation());
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// Emit warning for each block we bailed out on
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typedef CoreEngine::BlocksAborted::const_iterator AbortedIterator;
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const CoreEngine &CE = Eng.getCoreEngine();
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for (AbortedIterator I = CE.blocks_aborted_begin(),
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E = CE.blocks_aborted_end(); I != E; ++I) {
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const BlockEdge &BE = I->first;
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const CFGBlock *Exit = BE.getDst();
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const CFGElement &CE = Exit->front();
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if (const CFGStmt *CS = dyn_cast<CFGStmt>(&CE))
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B.EmitBasicReport("Bailout Point", "Internal Statistics", "The analyzer "
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"stopped analyzing at this point", CS->getStmt()->getLocStart());
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}
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}
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