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| Current File : //compat/linux/proc/68247/root/usr/src/contrib/llvm/tools/clang/lib/StaticAnalyzer/Core/CheckerManager.cpp |
//===--- CheckerManager.cpp - Static Analyzer Checker Manager -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Defines the Static Analyzer Checker Manager.
//
//===----------------------------------------------------------------------===//
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ObjCMessage.h"
#include "clang/Analysis/ProgramPoint.h"
#include "clang/AST/DeclBase.h"
using namespace clang;
using namespace ento;
bool CheckerManager::hasPathSensitiveCheckers() const {
return !StmtCheckers.empty() ||
!PreObjCMessageCheckers.empty() ||
!PostObjCMessageCheckers.empty() ||
!LocationCheckers.empty() ||
!BindCheckers.empty() ||
!EndAnalysisCheckers.empty() ||
!EndPathCheckers.empty() ||
!BranchConditionCheckers.empty() ||
!LiveSymbolsCheckers.empty() ||
!DeadSymbolsCheckers.empty() ||
!RegionChangesCheckers.empty() ||
!EvalAssumeCheckers.empty() ||
!EvalCallCheckers.empty() ||
!InlineCallCheckers.empty();
}
void CheckerManager::finishedCheckerRegistration() {
#ifndef NDEBUG
// Make sure that for every event that has listeners, there is at least
// one dispatcher registered for it.
for (llvm::DenseMap<EventTag, EventInfo>::iterator
I = Events.begin(), E = Events.end(); I != E; ++I)
assert(I->second.HasDispatcher && "No dispatcher registered for an event");
#endif
}
//===----------------------------------------------------------------------===//
// Functions for running checkers for AST traversing..
//===----------------------------------------------------------------------===//
void CheckerManager::runCheckersOnASTDecl(const Decl *D, AnalysisManager& mgr,
BugReporter &BR) {
assert(D);
unsigned DeclKind = D->getKind();
CachedDeclCheckers *checkers = 0;
CachedDeclCheckersMapTy::iterator CCI = CachedDeclCheckersMap.find(DeclKind);
if (CCI != CachedDeclCheckersMap.end()) {
checkers = &(CCI->second);
} else {
// Find the checkers that should run for this Decl and cache them.
checkers = &CachedDeclCheckersMap[DeclKind];
for (unsigned i = 0, e = DeclCheckers.size(); i != e; ++i) {
DeclCheckerInfo &info = DeclCheckers[i];
if (info.IsForDeclFn(D))
checkers->push_back(info.CheckFn);
}
}
assert(checkers);
for (CachedDeclCheckers::iterator
I = checkers->begin(), E = checkers->end(); I != E; ++I)
(*I)(D, mgr, BR);
}
void CheckerManager::runCheckersOnASTBody(const Decl *D, AnalysisManager& mgr,
BugReporter &BR) {
assert(D && D->hasBody());
for (unsigned i = 0, e = BodyCheckers.size(); i != e; ++i)
BodyCheckers[i](D, mgr, BR);
}
//===----------------------------------------------------------------------===//
// Functions for running checkers for path-sensitive checking.
//===----------------------------------------------------------------------===//
template <typename CHECK_CTX>
static void expandGraphWithCheckers(CHECK_CTX checkCtx,
ExplodedNodeSet &Dst,
const ExplodedNodeSet &Src) {
const NodeBuilderContext &BldrCtx = checkCtx.Eng.getBuilderContext();
if (Src.empty())
return;
typename CHECK_CTX::CheckersTy::const_iterator
I = checkCtx.checkers_begin(), E = checkCtx.checkers_end();
if (I == E) {
Dst.insert(Src);
return;
}
ExplodedNodeSet Tmp1, Tmp2;
const ExplodedNodeSet *PrevSet = &Src;
for (; I != E; ++I) {
ExplodedNodeSet *CurrSet = 0;
if (I+1 == E)
CurrSet = &Dst;
else {
CurrSet = (PrevSet == &Tmp1) ? &Tmp2 : &Tmp1;
CurrSet->clear();
}
NodeBuilder B(*PrevSet, *CurrSet, BldrCtx);
for (ExplodedNodeSet::iterator NI = PrevSet->begin(), NE = PrevSet->end();
NI != NE; ++NI) {
checkCtx.runChecker(*I, B, *NI);
}
// If all the produced transitions are sinks, stop.
if (CurrSet->empty())
return;
// Update which NodeSet is the current one.
PrevSet = CurrSet;
}
}
namespace {
struct CheckStmtContext {
typedef SmallVectorImpl<CheckerManager::CheckStmtFunc> CheckersTy;
bool IsPreVisit;
const CheckersTy &Checkers;
const Stmt *S;
ExprEngine &Eng;
bool wasInlined;
CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
CheckStmtContext(bool isPreVisit, const CheckersTy &checkers,
const Stmt *s, ExprEngine &eng, bool wasInlined = false)
: IsPreVisit(isPreVisit), Checkers(checkers), S(s), Eng(eng),
wasInlined(wasInlined) {}
void runChecker(CheckerManager::CheckStmtFunc checkFn,
NodeBuilder &Bldr, ExplodedNode *Pred) {
// FIXME: Remove respondsToCallback from CheckerContext;
ProgramPoint::Kind K = IsPreVisit ? ProgramPoint::PreStmtKind :
ProgramPoint::PostStmtKind;
const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
Pred->getLocationContext(), checkFn.Checker);
CheckerContext C(Bldr, Eng, Pred, L, wasInlined);
checkFn(S, C);
}
};
}
/// \brief Run checkers for visiting Stmts.
void CheckerManager::runCheckersForStmt(bool isPreVisit,
ExplodedNodeSet &Dst,
const ExplodedNodeSet &Src,
const Stmt *S,
ExprEngine &Eng,
bool wasInlined) {
CheckStmtContext C(isPreVisit, *getCachedStmtCheckersFor(S, isPreVisit),
S, Eng, wasInlined);
expandGraphWithCheckers(C, Dst, Src);
}
namespace {
struct CheckObjCMessageContext {
typedef std::vector<CheckerManager::CheckObjCMessageFunc> CheckersTy;
bool IsPreVisit;
const CheckersTy &Checkers;
const ObjCMessage &Msg;
ExprEngine &Eng;
CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
CheckObjCMessageContext(bool isPreVisit, const CheckersTy &checkers,
const ObjCMessage &msg, ExprEngine &eng)
: IsPreVisit(isPreVisit), Checkers(checkers), Msg(msg), Eng(eng) { }
void runChecker(CheckerManager::CheckObjCMessageFunc checkFn,
NodeBuilder &Bldr, ExplodedNode *Pred) {
ProgramPoint::Kind K = IsPreVisit ? ProgramPoint::PreStmtKind :
ProgramPoint::PostStmtKind;
const ProgramPoint &L =
ProgramPoint::getProgramPoint(Msg.getMessageExpr(),
K, Pred->getLocationContext(),
checkFn.Checker);
CheckerContext C(Bldr, Eng, Pred, L);
checkFn(Msg, C);
}
};
}
/// \brief Run checkers for visiting obj-c messages.
void CheckerManager::runCheckersForObjCMessage(bool isPreVisit,
ExplodedNodeSet &Dst,
const ExplodedNodeSet &Src,
const ObjCMessage &msg,
ExprEngine &Eng) {
CheckObjCMessageContext C(isPreVisit,
isPreVisit ? PreObjCMessageCheckers
: PostObjCMessageCheckers,
msg, Eng);
expandGraphWithCheckers(C, Dst, Src);
}
namespace {
struct CheckLocationContext {
typedef std::vector<CheckerManager::CheckLocationFunc> CheckersTy;
const CheckersTy &Checkers;
SVal Loc;
bool IsLoad;
const Stmt *NodeEx; /* Will become a CFGStmt */
const Stmt *BoundEx;
ExprEngine &Eng;
CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
CheckLocationContext(const CheckersTy &checkers,
SVal loc, bool isLoad, const Stmt *NodeEx,
const Stmt *BoundEx,
ExprEngine &eng)
: Checkers(checkers), Loc(loc), IsLoad(isLoad), NodeEx(NodeEx),
BoundEx(BoundEx), Eng(eng) {}
void runChecker(CheckerManager::CheckLocationFunc checkFn,
NodeBuilder &Bldr, ExplodedNode *Pred) {
ProgramPoint::Kind K = IsLoad ? ProgramPoint::PreLoadKind :
ProgramPoint::PreStoreKind;
const ProgramPoint &L =
ProgramPoint::getProgramPoint(NodeEx, K,
Pred->getLocationContext(),
checkFn.Checker);
CheckerContext C(Bldr, Eng, Pred, L);
checkFn(Loc, IsLoad, BoundEx, C);
}
};
}
/// \brief Run checkers for load/store of a location.
void CheckerManager::runCheckersForLocation(ExplodedNodeSet &Dst,
const ExplodedNodeSet &Src,
SVal location, bool isLoad,
const Stmt *NodeEx,
const Stmt *BoundEx,
ExprEngine &Eng) {
CheckLocationContext C(LocationCheckers, location, isLoad, NodeEx,
BoundEx, Eng);
expandGraphWithCheckers(C, Dst, Src);
}
namespace {
struct CheckBindContext {
typedef std::vector<CheckerManager::CheckBindFunc> CheckersTy;
const CheckersTy &Checkers;
SVal Loc;
SVal Val;
const Stmt *S;
ExprEngine &Eng;
ProgramPoint::Kind PointKind;
CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
CheckBindContext(const CheckersTy &checkers,
SVal loc, SVal val, const Stmt *s, ExprEngine &eng,
ProgramPoint::Kind PK)
: Checkers(checkers), Loc(loc), Val(val), S(s), Eng(eng), PointKind(PK) {}
void runChecker(CheckerManager::CheckBindFunc checkFn,
NodeBuilder &Bldr, ExplodedNode *Pred) {
const ProgramPoint &L = ProgramPoint::getProgramPoint(S, PointKind,
Pred->getLocationContext(), checkFn.Checker);
CheckerContext C(Bldr, Eng, Pred, L);
checkFn(Loc, Val, S, C);
}
};
}
/// \brief Run checkers for binding of a value to a location.
void CheckerManager::runCheckersForBind(ExplodedNodeSet &Dst,
const ExplodedNodeSet &Src,
SVal location, SVal val,
const Stmt *S, ExprEngine &Eng,
ProgramPoint::Kind PointKind) {
CheckBindContext C(BindCheckers, location, val, S, Eng, PointKind);
expandGraphWithCheckers(C, Dst, Src);
}
void CheckerManager::runCheckersForEndAnalysis(ExplodedGraph &G,
BugReporter &BR,
ExprEngine &Eng) {
for (unsigned i = 0, e = EndAnalysisCheckers.size(); i != e; ++i)
EndAnalysisCheckers[i](G, BR, Eng);
}
/// \brief Run checkers for end of path.
// Note, We do not chain the checker output (like in expandGraphWithCheckers)
// for this callback since end of path nodes are expected to be final.
void CheckerManager::runCheckersForEndPath(NodeBuilderContext &BC,
ExplodedNodeSet &Dst,
ExprEngine &Eng) {
ExplodedNode *Pred = BC.Pred;
// We define the builder outside of the loop bacause if at least one checkers
// creates a sucsessor for Pred, we do not need to generate an
// autotransition for it.
NodeBuilder Bldr(Pred, Dst, BC);
for (unsigned i = 0, e = EndPathCheckers.size(); i != e; ++i) {
CheckEndPathFunc checkFn = EndPathCheckers[i];
const ProgramPoint &L = BlockEntrance(BC.Block,
Pred->getLocationContext(),
checkFn.Checker);
CheckerContext C(Bldr, Eng, Pred, L);
checkFn(C);
}
}
namespace {
struct CheckBranchConditionContext {
typedef std::vector<CheckerManager::CheckBranchConditionFunc> CheckersTy;
const CheckersTy &Checkers;
const Stmt *Condition;
ExprEngine &Eng;
CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
CheckBranchConditionContext(const CheckersTy &checkers,
const Stmt *Cond, ExprEngine &eng)
: Checkers(checkers), Condition(Cond), Eng(eng) {}
void runChecker(CheckerManager::CheckBranchConditionFunc checkFn,
NodeBuilder &Bldr, ExplodedNode *Pred) {
ProgramPoint L = PostCondition(Condition, Pred->getLocationContext(),
checkFn.Checker);
CheckerContext C(Bldr, Eng, Pred, L);
checkFn(Condition, C);
}
};
}
/// \brief Run checkers for branch condition.
void CheckerManager::runCheckersForBranchCondition(const Stmt *Condition,
ExplodedNodeSet &Dst,
ExplodedNode *Pred,
ExprEngine &Eng) {
ExplodedNodeSet Src;
Src.insert(Pred);
CheckBranchConditionContext C(BranchConditionCheckers, Condition, Eng);
expandGraphWithCheckers(C, Dst, Src);
}
/// \brief Run checkers for live symbols.
void CheckerManager::runCheckersForLiveSymbols(ProgramStateRef state,
SymbolReaper &SymReaper) {
for (unsigned i = 0, e = LiveSymbolsCheckers.size(); i != e; ++i)
LiveSymbolsCheckers[i](state, SymReaper);
}
namespace {
struct CheckDeadSymbolsContext {
typedef std::vector<CheckerManager::CheckDeadSymbolsFunc> CheckersTy;
const CheckersTy &Checkers;
SymbolReaper &SR;
const Stmt *S;
ExprEngine &Eng;
CheckersTy::const_iterator checkers_begin() { return Checkers.begin(); }
CheckersTy::const_iterator checkers_end() { return Checkers.end(); }
CheckDeadSymbolsContext(const CheckersTy &checkers, SymbolReaper &sr,
const Stmt *s, ExprEngine &eng)
: Checkers(checkers), SR(sr), S(s), Eng(eng) { }
void runChecker(CheckerManager::CheckDeadSymbolsFunc checkFn,
NodeBuilder &Bldr, ExplodedNode *Pred) {
ProgramPoint::Kind K = ProgramPoint::PostPurgeDeadSymbolsKind;
const ProgramPoint &L = ProgramPoint::getProgramPoint(S, K,
Pred->getLocationContext(), checkFn.Checker);
CheckerContext C(Bldr, Eng, Pred, L);
checkFn(SR, C);
}
};
}
/// \brief Run checkers for dead symbols.
void CheckerManager::runCheckersForDeadSymbols(ExplodedNodeSet &Dst,
const ExplodedNodeSet &Src,
SymbolReaper &SymReaper,
const Stmt *S,
ExprEngine &Eng) {
CheckDeadSymbolsContext C(DeadSymbolsCheckers, SymReaper, S, Eng);
expandGraphWithCheckers(C, Dst, Src);
}
/// \brief True if at least one checker wants to check region changes.
bool CheckerManager::wantsRegionChangeUpdate(ProgramStateRef state) {
for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i)
if (RegionChangesCheckers[i].WantUpdateFn(state))
return true;
return false;
}
/// \brief Run checkers for region changes.
ProgramStateRef
CheckerManager::runCheckersForRegionChanges(ProgramStateRef state,
const StoreManager::InvalidatedSymbols *invalidated,
ArrayRef<const MemRegion *> ExplicitRegions,
ArrayRef<const MemRegion *> Regions,
const CallOrObjCMessage *Call) {
for (unsigned i = 0, e = RegionChangesCheckers.size(); i != e; ++i) {
// If any checker declares the state infeasible (or if it starts that way),
// bail out.
if (!state)
return NULL;
state = RegionChangesCheckers[i].CheckFn(state, invalidated,
ExplicitRegions, Regions, Call);
}
return state;
}
/// \brief Run checkers for handling assumptions on symbolic values.
ProgramStateRef
CheckerManager::runCheckersForEvalAssume(ProgramStateRef state,
SVal Cond, bool Assumption) {
for (unsigned i = 0, e = EvalAssumeCheckers.size(); i != e; ++i) {
// If any checker declares the state infeasible (or if it starts that way),
// bail out.
if (!state)
return NULL;
state = EvalAssumeCheckers[i](state, Cond, Assumption);
}
return state;
}
/// \brief Run checkers for evaluating a call.
/// Only one checker will evaluate the call.
void CheckerManager::runCheckersForEvalCall(ExplodedNodeSet &Dst,
const ExplodedNodeSet &Src,
const CallExpr *CE,
ExprEngine &Eng,
GraphExpander *defaultEval) {
if (EvalCallCheckers.empty() &&
InlineCallCheckers.empty() &&
defaultEval == 0) {
Dst.insert(Src);
return;
}
for (ExplodedNodeSet::iterator
NI = Src.begin(), NE = Src.end(); NI != NE; ++NI) {
ExplodedNode *Pred = *NI;
bool anyEvaluated = false;
// First, check if any of the InlineCall callbacks can evaluate the call.
assert(InlineCallCheckers.size() <= 1 &&
"InlineCall is a special hacky callback to allow intrusive"
"evaluation of the call (which simulates inlining). It is "
"currently only used by OSAtomicChecker and should go away "
"at some point.");
for (std::vector<InlineCallFunc>::iterator
EI = InlineCallCheckers.begin(), EE = InlineCallCheckers.end();
EI != EE; ++EI) {
ExplodedNodeSet checkDst;
bool evaluated = (*EI)(CE, Eng, Pred, checkDst);
assert(!(evaluated && anyEvaluated)
&& "There are more than one checkers evaluating the call");
if (evaluated) {
anyEvaluated = true;
Dst.insert(checkDst);
#ifdef NDEBUG
break; // on release don't check that no other checker also evals.
#endif
}
}
#ifdef NDEBUG // on release don't check that no other checker also evals.
if (anyEvaluated) {
break;
}
#endif
ExplodedNodeSet checkDst;
NodeBuilder B(Pred, checkDst, Eng.getBuilderContext());
// Next, check if any of the EvalCall callbacks can evaluate the call.
for (std::vector<EvalCallFunc>::iterator
EI = EvalCallCheckers.begin(), EE = EvalCallCheckers.end();
EI != EE; ++EI) {
ProgramPoint::Kind K = ProgramPoint::PostStmtKind;
const ProgramPoint &L = ProgramPoint::getProgramPoint(CE, K,
Pred->getLocationContext(), EI->Checker);
bool evaluated = false;
{ // CheckerContext generates transitions(populates checkDest) on
// destruction, so introduce the scope to make sure it gets properly
// populated.
CheckerContext C(B, Eng, Pred, L);
evaluated = (*EI)(CE, C);
}
assert(!(evaluated && anyEvaluated)
&& "There are more than one checkers evaluating the call");
if (evaluated) {
anyEvaluated = true;
Dst.insert(checkDst);
#ifdef NDEBUG
break; // on release don't check that no other checker also evals.
#endif
}
}
// If none of the checkers evaluated the call, ask ExprEngine to handle it.
if (!anyEvaluated) {
if (defaultEval)
defaultEval->expandGraph(Dst, Pred);
else
Dst.insert(Pred);
}
}
}
/// \brief Run checkers for the entire Translation Unit.
void CheckerManager::runCheckersOnEndOfTranslationUnit(
const TranslationUnitDecl *TU,
AnalysisManager &mgr,
BugReporter &BR) {
for (unsigned i = 0, e = EndOfTranslationUnitCheckers.size(); i != e; ++i)
EndOfTranslationUnitCheckers[i](TU, mgr, BR);
}
void CheckerManager::runCheckersForPrintState(raw_ostream &Out,
ProgramStateRef State,
const char *NL, const char *Sep) {
for (llvm::DenseMap<CheckerTag, CheckerRef>::iterator
I = CheckerTags.begin(), E = CheckerTags.end(); I != E; ++I)
I->second->printState(Out, State, NL, Sep);
}
//===----------------------------------------------------------------------===//
// Internal registration functions for AST traversing.
//===----------------------------------------------------------------------===//
void CheckerManager::_registerForDecl(CheckDeclFunc checkfn,
HandlesDeclFunc isForDeclFn) {
DeclCheckerInfo info = { checkfn, isForDeclFn };
DeclCheckers.push_back(info);
}
void CheckerManager::_registerForBody(CheckDeclFunc checkfn) {
BodyCheckers.push_back(checkfn);
}
//===----------------------------------------------------------------------===//
// Internal registration functions for path-sensitive checking.
//===----------------------------------------------------------------------===//
void CheckerManager::_registerForPreStmt(CheckStmtFunc checkfn,
HandlesStmtFunc isForStmtFn) {
StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/true };
StmtCheckers.push_back(info);
}
void CheckerManager::_registerForPostStmt(CheckStmtFunc checkfn,
HandlesStmtFunc isForStmtFn) {
StmtCheckerInfo info = { checkfn, isForStmtFn, /*IsPreVisit*/false };
StmtCheckers.push_back(info);
}
void CheckerManager::_registerForPreObjCMessage(CheckObjCMessageFunc checkfn) {
PreObjCMessageCheckers.push_back(checkfn);
}
void CheckerManager::_registerForPostObjCMessage(CheckObjCMessageFunc checkfn) {
PostObjCMessageCheckers.push_back(checkfn);
}
void CheckerManager::_registerForLocation(CheckLocationFunc checkfn) {
LocationCheckers.push_back(checkfn);
}
void CheckerManager::_registerForBind(CheckBindFunc checkfn) {
BindCheckers.push_back(checkfn);
}
void CheckerManager::_registerForEndAnalysis(CheckEndAnalysisFunc checkfn) {
EndAnalysisCheckers.push_back(checkfn);
}
void CheckerManager::_registerForEndPath(CheckEndPathFunc checkfn) {
EndPathCheckers.push_back(checkfn);
}
void CheckerManager::_registerForBranchCondition(
CheckBranchConditionFunc checkfn) {
BranchConditionCheckers.push_back(checkfn);
}
void CheckerManager::_registerForLiveSymbols(CheckLiveSymbolsFunc checkfn) {
LiveSymbolsCheckers.push_back(checkfn);
}
void CheckerManager::_registerForDeadSymbols(CheckDeadSymbolsFunc checkfn) {
DeadSymbolsCheckers.push_back(checkfn);
}
void CheckerManager::_registerForRegionChanges(CheckRegionChangesFunc checkfn,
WantsRegionChangeUpdateFunc wantUpdateFn) {
RegionChangesCheckerInfo info = {checkfn, wantUpdateFn};
RegionChangesCheckers.push_back(info);
}
void CheckerManager::_registerForEvalAssume(EvalAssumeFunc checkfn) {
EvalAssumeCheckers.push_back(checkfn);
}
void CheckerManager::_registerForEvalCall(EvalCallFunc checkfn) {
EvalCallCheckers.push_back(checkfn);
}
void CheckerManager::_registerForInlineCall(InlineCallFunc checkfn) {
InlineCallCheckers.push_back(checkfn);
}
void CheckerManager::_registerForEndOfTranslationUnit(
CheckEndOfTranslationUnit checkfn) {
EndOfTranslationUnitCheckers.push_back(checkfn);
}
//===----------------------------------------------------------------------===//
// Implementation details.
//===----------------------------------------------------------------------===//
CheckerManager::CachedStmtCheckers *
CheckerManager::getCachedStmtCheckersFor(const Stmt *S, bool isPreVisit) {
assert(S);
CachedStmtCheckersKey key(S->getStmtClass(), isPreVisit);
CachedStmtCheckers *checkers = 0;
CachedStmtCheckersMapTy::iterator CCI = CachedStmtCheckersMap.find(key);
if (CCI != CachedStmtCheckersMap.end()) {
checkers = &(CCI->second);
} else {
// Find the checkers that should run for this Stmt and cache them.
checkers = &CachedStmtCheckersMap[key];
for (unsigned i = 0, e = StmtCheckers.size(); i != e; ++i) {
StmtCheckerInfo &info = StmtCheckers[i];
if (info.IsPreVisit == isPreVisit && info.IsForStmtFn(S))
checkers->push_back(info.CheckFn);
}
}
assert(checkers);
return checkers;
}
CheckerManager::~CheckerManager() {
for (unsigned i = 0, e = CheckerDtors.size(); i != e; ++i)
CheckerDtors[i]();
}
// Anchor for the vtable.
GraphExpander::~GraphExpander() { }