forked from OSchip/llvm-project
104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
//== SymbolManager.h - Management of Symbolic Values ------------*- C++ -*--==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines SymbolManager, a class that manages symbolic values
|
|
// created for use by GRExprEngine and related classes.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/Analysis/PathSensitive/SymbolManager.h"
|
|
#include "clang/Analysis/PathSensitive/MemRegion.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
using namespace clang;
|
|
|
|
void SymbolRef::print(llvm::raw_ostream& os) const {
|
|
os << getNumber();
|
|
}
|
|
|
|
SymbolRef SymbolManager::getRegionRValueSymbol(const MemRegion* R) {
|
|
llvm::FoldingSetNodeID profile;
|
|
|
|
SymbolRegionRValue::Profile(profile, R);
|
|
void* InsertPos;
|
|
SymbolData* SD = DataSet.FindNodeOrInsertPos(profile, InsertPos);
|
|
if (SD) return SD->getSymbol();
|
|
|
|
SD = (SymbolData*) BPAlloc.Allocate<SymbolRegionRValue>();
|
|
new (SD) SymbolRegionRValue(SymbolCounter, R);
|
|
DataSet.InsertNode(SD, InsertPos);
|
|
DataMap[SymbolCounter] = SD;
|
|
return SymbolCounter++;
|
|
|
|
}
|
|
|
|
SymbolRef SymbolManager::getConjuredSymbol(Stmt* E, QualType T, unsigned Count){
|
|
|
|
llvm::FoldingSetNodeID profile;
|
|
SymbolConjured::Profile(profile, E, T, Count);
|
|
void* InsertPos;
|
|
|
|
SymbolData* SD = DataSet.FindNodeOrInsertPos(profile, InsertPos);
|
|
|
|
if (SD)
|
|
return SD->getSymbol();
|
|
|
|
SD = (SymbolData*) BPAlloc.Allocate<SymbolConjured>();
|
|
new (SD) SymbolConjured(SymbolCounter, E, T, Count);
|
|
|
|
DataSet.InsertNode(SD, InsertPos);
|
|
DataMap[SymbolCounter] = SD;
|
|
|
|
return SymbolCounter++;
|
|
}
|
|
|
|
const SymbolData& SymbolManager::getSymbolData(SymbolRef Sym) const {
|
|
DataMapTy::const_iterator I = DataMap.find(Sym);
|
|
assert (I != DataMap.end());
|
|
return *I->second;
|
|
}
|
|
|
|
|
|
QualType SymbolConjured::getType(ASTContext&) const {
|
|
return T;
|
|
}
|
|
|
|
QualType SymbolRegionRValue::getType(ASTContext& C) const {
|
|
if (const TypedRegion* TR = dyn_cast<TypedRegion>(R))
|
|
return TR->getRValueType(C);
|
|
|
|
return QualType();
|
|
}
|
|
|
|
SymbolManager::~SymbolManager() {}
|
|
|
|
void SymbolReaper::markLive(SymbolRef sym) {
|
|
TheLiving = F.Add(TheLiving, sym);
|
|
TheDead = F.Remove(TheDead, sym);
|
|
}
|
|
|
|
bool SymbolReaper::maybeDead(SymbolRef sym) {
|
|
if (isLive(sym))
|
|
return false;
|
|
|
|
TheDead = F.Add(TheDead, sym);
|
|
return true;
|
|
}
|
|
|
|
bool SymbolReaper::isLive(SymbolRef sym) {
|
|
if (TheLiving.contains(sym))
|
|
return true;
|
|
|
|
// Interogate the symbol. It may derive from an input value to
|
|
// the analyzed function/method.
|
|
return isa<SymbolRegionRValue>(SymMgr.getSymbolData(sym));
|
|
}
|
|
|
|
SymbolVisitor::~SymbolVisitor() {}
|