зеркало из https://github.com/microsoft/clang-1.git
120 строки
3.8 KiB
C++
120 строки
3.8 KiB
C++
//==--AnalyzerStatsChecker.cpp - Analyzer visitation statistics --*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
// This file reports various statistics about analyzer visitation.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/Checker/PathSensitive/CheckerVisitor.h"
|
|
#include "clang/Checker/PathSensitive/ExplodedGraph.h"
|
|
#include "clang/Checker/BugReporter/BugReporter.h"
|
|
#include "GRExprEngineExperimentalChecks.h"
|
|
#include "clang/Basic/SourceManager.h"
|
|
#include "llvm/ADT/SmallPtrSet.h"
|
|
|
|
using namespace clang;
|
|
|
|
namespace {
|
|
class AnalyzerStatsChecker : public CheckerVisitor<AnalyzerStatsChecker> {
|
|
public:
|
|
static void *getTag();
|
|
void VisitEndAnalysis(ExplodedGraph &G, BugReporter &B, GRExprEngine &Eng);
|
|
|
|
private:
|
|
llvm::SmallPtrSet<const CFGBlock*, 256> reachable;
|
|
};
|
|
}
|
|
|
|
void *AnalyzerStatsChecker::getTag() {
|
|
static int x = 0;
|
|
return &x;
|
|
}
|
|
|
|
void clang::RegisterAnalyzerStatsChecker(GRExprEngine &Eng) {
|
|
Eng.registerCheck(new AnalyzerStatsChecker());
|
|
}
|
|
|
|
void AnalyzerStatsChecker::VisitEndAnalysis(ExplodedGraph &G,
|
|
BugReporter &B,
|
|
GRExprEngine &Eng) {
|
|
const CFG *C = 0;
|
|
const Decl *D = 0;
|
|
const LocationContext *LC = 0;
|
|
const SourceManager &SM = B.getSourceManager();
|
|
|
|
// Iterate over explodedgraph
|
|
for (ExplodedGraph::node_iterator I = G.nodes_begin();
|
|
I != G.nodes_end(); ++I) {
|
|
const ProgramPoint &P = I->getLocation();
|
|
// Save the LocationContext if we don't have it already
|
|
if (!LC)
|
|
LC = P.getLocationContext();
|
|
|
|
if (const BlockEntrance *BE = dyn_cast<BlockEntrance>(&P)) {
|
|
const CFGBlock *CB = BE->getBlock();
|
|
reachable.insert(CB);
|
|
}
|
|
}
|
|
|
|
// Get the CFG and the Decl of this block
|
|
C = LC->getCFG();
|
|
D = LC->getAnalysisContext()->getDecl();
|
|
|
|
unsigned total = 0, unreachable = 0;
|
|
|
|
// Find CFGBlocks that were not covered by any node
|
|
for (CFG::const_iterator I = C->begin(); I != C->end(); ++I) {
|
|
const CFGBlock *CB = *I;
|
|
++total;
|
|
// Check if the block is unreachable
|
|
if (!reachable.count(CB)) {
|
|
++unreachable;
|
|
}
|
|
}
|
|
|
|
// We never 'reach' the entry block, so correct the unreachable count
|
|
unreachable--;
|
|
|
|
// Generate the warning string
|
|
llvm::SmallString<128> buf;
|
|
llvm::raw_svector_ostream output(buf);
|
|
PresumedLoc Loc = SM.getPresumedLoc(D->getLocation());
|
|
if (Loc.isValid()) {
|
|
output << Loc.getFilename() << " : ";
|
|
|
|
if (isa<FunctionDecl>(D) || isa<ObjCMethodDecl>(D)) {
|
|
const NamedDecl *ND = cast<NamedDecl>(D);
|
|
output << ND;
|
|
}
|
|
else if (isa<BlockDecl>(D)) {
|
|
output << "block(line:" << Loc.getLine() << ":col:" << Loc.getColumn();
|
|
}
|
|
}
|
|
|
|
output << " -> Total CFGBlocks: " << total << " | Unreachable CFGBlocks: "
|
|
<< unreachable << " | Aborted Block: "
|
|
<< (Eng.wasBlockAborted() ? "yes" : "no")
|
|
<< " | Empty WorkList: "
|
|
<< (Eng.hasEmptyWorkList() ? "yes" : "no");
|
|
|
|
B.EmitBasicReport("Analyzer Statistics", "Internal Statistics", output.str(),
|
|
D->getLocation());
|
|
|
|
// Emit warning for each block we bailed out on
|
|
typedef GRCoreEngine::BlocksAborted::const_iterator AbortedIterator;
|
|
const GRCoreEngine &CE = Eng.getCoreEngine();
|
|
for (AbortedIterator I = CE.blocks_aborted_begin(),
|
|
E = CE.blocks_aborted_end(); I != E; ++I) {
|
|
const BlockEdge &BE = I->first;
|
|
const CFGBlock *Exit = BE.getDst();
|
|
const CFGElement &CE = Exit->front();
|
|
if (const CFGStmt *CS = dyn_cast<CFGStmt>(&CE))
|
|
B.EmitBasicReport("Bailout Point", "Internal Statistics", "The analyzer "
|
|
"stopped analyzing at this point", CS->getStmt()->getLocStart());
|
|
}
|
|
}
|