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Add an optional "tag" to conjured symbols that allows us to distinguish between 

multiple symbols conjured at the same location. All that is required of the tag
is that it is a fixed void* value that points to an memory address that remains
valid throughout the remainder of the lifetime of the SymbolManager.

llvm-svn: 66092
This commit is contained in:
Ted Kremenek 2009-03-04 22:53:46 +00:00
parent 2d33d6300c
commit 6ee8f8bcb5
2 changed files with 24 additions and 15 deletions
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32
clang/include/clang/Analysis/PathSensitive/SymbolManager.h
View File

@ -139,28 +139,33 @@ class SymbolConjured : public SymbolData {
Stmt* S;
QualType T;
unsigned Count;
const void* SymbolTag;
public:
SymbolConjured(SymbolRef Sym, Stmt* s, QualType t, unsigned count)
: SymbolData(ConjuredKind, Sym), S(s), T(t), Count(count) {}
SymbolConjured(SymbolRef Sym, Stmt* s, QualType t, unsigned count,
const void* symbolTag)
: SymbolData(ConjuredKind, Sym), S(s), T(t), Count(count),
SymbolTag(symbolTag) {}
Stmt* getStmt() const { return S; }
unsigned getCount() const { return Count; }
unsigned getCount() const { return Count; }
const void* getTag() const { return SymbolTag; }
QualType getType(ASTContext&) const;
static void Profile(llvm::FoldingSetNodeID& profile,
Stmt* S, QualType T, unsigned Count) {
static void Profile(llvm::FoldingSetNodeID& profile, Stmt* S, QualType T,
unsigned Count, const void* SymbolTag) {
profile.AddInteger((unsigned) ConjuredKind);
profile.AddPointer(S);
profile.Add(T);
profile.AddInteger(Count);
profile.AddPointer(SymbolTag);
}
virtual void Profile(llvm::FoldingSetNodeID& profile) {
Profile(profile, S, T, Count);
Profile(profile, S, T, Count, SymbolTag);
}
// Implement isa<T> support.
static inline bool classof(const SymbolData* D) {
return D->getKind() == ConjuredKind;
@ -217,9 +222,12 @@ public:
/// Make a unique symbol for MemRegion R according to its kind.
SymbolRef getRegionRValueSymbol(const MemRegion* R);
SymbolRef getConjuredSymbol(Stmt* E, QualType T, unsigned VisitCount);
SymbolRef getConjuredSymbol(Expr* E, unsigned VisitCount) {
return getConjuredSymbol(E, E->getType(), VisitCount);
SymbolRef getConjuredSymbol(Stmt* E, QualType T, unsigned VisitCount,
const void* SymbolTag = 0);
SymbolRef getConjuredSymbol(Expr* E, unsigned VisitCount,
const void* SymbolTag = 0) {
return getConjuredSymbol(E, E->getType(), VisitCount, SymbolTag);
}
const SymbolData& getSymbolData(SymbolRef ID) const;

7
clang/lib/Analysis/SymbolManager.cpp
View File

@ -52,10 +52,11 @@ SymbolRef SymbolManager::getRegionRValueSymbol(const MemRegion* R) {
return SymbolCounter++;
}
SymbolRef SymbolManager::getConjuredSymbol(Stmt* E, QualType T, unsigned Count){
SymbolRef SymbolManager::getConjuredSymbol(Stmt* E, QualType T, unsigned Count,
const void* SymbolTag) {
llvm::FoldingSetNodeID profile;
SymbolConjured::Profile(profile, E, T, Count);
SymbolConjured::Profile(profile, E, T, Count, SymbolTag);
void* InsertPos;
SymbolData* SD = DataSet.FindNodeOrInsertPos(profile, InsertPos);
@ -64,7 +65,7 @@ SymbolRef SymbolManager::getConjuredSymbol(Stmt* E, QualType T, unsigned Count){
return SD->getSymbol();
SD = (SymbolData*) BPAlloc.Allocate<SymbolConjured>();
new (SD) SymbolConjured(SymbolCounter, E, T, Count);
new (SD) SymbolConjured(SymbolCounter, E, T, Count, SymbolTag);
DataSet.InsertNode(SD, InsertPos);
DataMap[SymbolCounter] = SD;