forked from OSchip/llvm-project
119 lines
4.0 KiB
C++
119 lines
4.0 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 "ClangSACheckers.h"
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#include "clang/StaticAnalyzer/Core/Checker.h"
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#include "clang/StaticAnalyzer/Core/CheckerManager.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
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#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/Basic/SourceManager.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallString.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 Checker<check::EndAnalysis> {
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public:
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void checkEndAnalysis(ExplodedGraph &G, BugReporter &B,ExprEngine &Eng) const;
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};
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}
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void AnalyzerStatsChecker::checkEndAnalysis(ExplodedGraph &G,
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BugReporter &B,
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ExprEngine &Eng) const {
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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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llvm::SmallPtrSet<const CFGBlock*, 256> reachable;
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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->getAnalysisDeclContext()->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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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 << " | Exhausted Block: "
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<< (Eng.wasBlocksExhausted() ? "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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PathDiagnosticLocation(D, SM));
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// Emit warning for each block we bailed out on
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typedef CoreEngine::BlocksExhausted::const_iterator ExhaustedIterator;
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const CoreEngine &CE = Eng.getCoreEngine();
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for (ExhaustedIterator I = CE.blocks_exhausted_begin(),
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E = CE.blocks_exhausted_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",
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PathDiagnosticLocation::createBegin(CS->getStmt(), SM, LC));
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}
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}
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void ento::registerAnalyzerStatsChecker(CheckerManager &mgr) {
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mgr.registerChecker<AnalyzerStatsChecker>();
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}
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