TraversalChecker.cpp revision 0ffbfd1a7f80f9a3c07317cb8f44c562f2ba1ba5
1//== TraversalChecker.cpp -------------------------------------- -*- C++ -*--=// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// These checkers print various aspects of the ExprEngine's traversal of the CFG 11// as it builds the ExplodedGraph. 12// 13//===----------------------------------------------------------------------===// 14#include "ClangSACheckers.h" 15#include "clang/AST/ParentMap.h" 16#include "clang/AST/StmtObjC.h" 17#include "clang/StaticAnalyzer/Core/Checker.h" 18#include "clang/StaticAnalyzer/Core/CheckerManager.h" 19#include "clang/StaticAnalyzer/Core/PathSensitive/Calls.h" 20#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" 21 22using namespace clang; 23using namespace ento; 24 25namespace { 26class TraversalDumper : public Checker< check::BranchCondition, 27 check::EndPath > { 28public: 29 void checkBranchCondition(const Stmt *Condition, CheckerContext &C) const; 30 void checkEndPath(CheckerContext &C) const; 31}; 32} 33 34void TraversalDumper::checkBranchCondition(const Stmt *Condition, 35 CheckerContext &C) const { 36 // Special-case Objective-C's for-in loop, which uses the entire loop as its 37 // condition. We just print the collection expression. 38 const Stmt *Parent = dyn_cast<ObjCForCollectionStmt>(Condition); 39 if (!Parent) { 40 const ParentMap &Parents = C.getLocationContext()->getParentMap(); 41 Parent = Parents.getParent(Condition); 42 } 43 44 // It is mildly evil to print directly to llvm::outs() rather than emitting 45 // warnings, but this ensures things do not get filtered out by the rest of 46 // the static analyzer machinery. 47 SourceLocation Loc = Parent->getLocStart(); 48 llvm::outs() << C.getSourceManager().getSpellingLineNumber(Loc) << " " 49 << Parent->getStmtClassName() << "\n"; 50} 51 52void TraversalDumper::checkEndPath(CheckerContext &C) const { 53 llvm::outs() << "--END PATH--\n"; 54} 55 56void ento::registerTraversalDumper(CheckerManager &mgr) { 57 mgr.registerChecker<TraversalDumper>(); 58} 59 60//------------------------------------------------------------------------------ 61 62namespace { 63class CallDumper : public Checker< check::PreCall > { 64public: 65 void checkPreCall(const CallEvent &Call, CheckerContext &C) const; 66}; 67} 68 69void CallDumper::checkPreCall(const CallEvent &Call, CheckerContext &C) const { 70 unsigned Indentation = 0; 71 for (const LocationContext *LC = C.getLocationContext()->getParent(); 72 LC != 0; LC = LC->getParent()) 73 ++Indentation; 74 75 // It is mildly evil to print directly to llvm::outs() rather than emitting 76 // warnings, but this ensures things do not get filtered out by the rest of 77 // the static analyzer machinery. 78 llvm::outs().indent(Indentation); 79 Call.dump(llvm::outs()); 80} 81 82void ento::registerCallDumper(CheckerManager &mgr) { 83 mgr.registerChecker<CallDumper>(); 84} 85