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Diffstat (limited to 'lib/Analysis/SymbolManager.cpp')
| -rw-r--r-- | lib/Analysis/SymbolManager.cpp | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/lib/Analysis/SymbolManager.cpp b/lib/Analysis/SymbolManager.cpp deleted file mode 100644 index 3fe36b0..0000000 --- a/lib/Analysis/SymbolManager.cpp +++ /dev/null @@ -1,228 +0,0 @@ -//== 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 SymExpr::dump() const { - dumpToStream(llvm::errs()); -} - -static void print(llvm::raw_ostream& os, BinaryOperator::Opcode Op) { - switch (Op) { - default: - assert(false && "operator printing not implemented"); - break; - case BinaryOperator::Mul: os << '*' ; break; - case BinaryOperator::Div: os << '/' ; break; - case BinaryOperator::Rem: os << '%' ; break; - case BinaryOperator::Add: os << '+' ; break; - case BinaryOperator::Sub: os << '-' ; break; - case BinaryOperator::Shl: os << "<<" ; break; - case BinaryOperator::Shr: os << ">>" ; break; - case BinaryOperator::LT: os << "<" ; break; - case BinaryOperator::GT: os << '>' ; break; - case BinaryOperator::LE: os << "<=" ; break; - case BinaryOperator::GE: os << ">=" ; break; - case BinaryOperator::EQ: os << "==" ; break; - case BinaryOperator::NE: os << "!=" ; break; - case BinaryOperator::And: os << '&' ; break; - case BinaryOperator::Xor: os << '^' ; break; - case BinaryOperator::Or: os << '|' ; break; - } -} - -void SymIntExpr::dumpToStream(llvm::raw_ostream& os) const { - os << '('; - getLHS()->dumpToStream(os); - os << ") "; - print(os, getOpcode()); - os << ' ' << getRHS().getZExtValue(); - if (getRHS().isUnsigned()) os << 'U'; -} - -void SymSymExpr::dumpToStream(llvm::raw_ostream& os) const { - os << '('; - getLHS()->dumpToStream(os); - os << ") "; - os << '('; - getRHS()->dumpToStream(os); - os << ')'; -} - -void SymbolConjured::dumpToStream(llvm::raw_ostream& os) const { - os << "conj_$" << getSymbolID() << '{' << T.getAsString() << '}'; -} - -void SymbolDerived::dumpToStream(llvm::raw_ostream& os) const { - os << "derived_$" << getSymbolID() << '{' - << getParentSymbol() << ',' << getRegion() << '}'; -} - -void SymbolRegionValue::dumpToStream(llvm::raw_ostream& os) const { - os << "reg_$" << getSymbolID() << "<" << R << ">"; -} - -const SymbolRegionValue* -SymbolManager::getRegionValueSymbol(const MemRegion* R, QualType T) { - llvm::FoldingSetNodeID profile; - SymbolRegionValue::Profile(profile, R, T); - void* InsertPos; - SymExpr *SD = DataSet.FindNodeOrInsertPos(profile, InsertPos); - if (!SD) { - SD = (SymExpr*) BPAlloc.Allocate<SymbolRegionValue>(); - new (SD) SymbolRegionValue(SymbolCounter, R, T); - DataSet.InsertNode(SD, InsertPos); - ++SymbolCounter; - } - - return cast<SymbolRegionValue>(SD); -} - -const SymbolConjured* -SymbolManager::getConjuredSymbol(const Stmt* E, QualType T, unsigned Count, - const void* SymbolTag) { - - llvm::FoldingSetNodeID profile; - SymbolConjured::Profile(profile, E, T, Count, SymbolTag); - void* InsertPos; - SymExpr *SD = DataSet.FindNodeOrInsertPos(profile, InsertPos); - if (!SD) { - SD = (SymExpr*) BPAlloc.Allocate<SymbolConjured>(); - new (SD) SymbolConjured(SymbolCounter, E, T, Count, SymbolTag); - DataSet.InsertNode(SD, InsertPos); - ++SymbolCounter; - } - - return cast<SymbolConjured>(SD); -} - -const SymbolDerived* -SymbolManager::getDerivedSymbol(SymbolRef parentSymbol, - const TypedRegion *R) { - - llvm::FoldingSetNodeID profile; - SymbolDerived::Profile(profile, parentSymbol, R); - void* InsertPos; - SymExpr *SD = DataSet.FindNodeOrInsertPos(profile, InsertPos); - if (!SD) { - SD = (SymExpr*) BPAlloc.Allocate<SymbolDerived>(); - new (SD) SymbolDerived(SymbolCounter, parentSymbol, R); - DataSet.InsertNode(SD, InsertPos); - ++SymbolCounter; - } - - return cast<SymbolDerived>(SD); -} - -const SymIntExpr *SymbolManager::getSymIntExpr(const SymExpr *lhs, - BinaryOperator::Opcode op, - const llvm::APSInt& v, - QualType t) { - llvm::FoldingSetNodeID ID; - SymIntExpr::Profile(ID, lhs, op, v, t); - void *InsertPos; - SymExpr *data = DataSet.FindNodeOrInsertPos(ID, InsertPos); - - if (!data) { - data = (SymIntExpr*) BPAlloc.Allocate<SymIntExpr>(); - new (data) SymIntExpr(lhs, op, v, t); - DataSet.InsertNode(data, InsertPos); - } - - return cast<SymIntExpr>(data); -} - -const SymSymExpr *SymbolManager::getSymSymExpr(const SymExpr *lhs, - BinaryOperator::Opcode op, - const SymExpr *rhs, - QualType t) { - llvm::FoldingSetNodeID ID; - SymSymExpr::Profile(ID, lhs, op, rhs, t); - void *InsertPos; - SymExpr *data = DataSet.FindNodeOrInsertPos(ID, InsertPos); - - if (!data) { - data = (SymSymExpr*) BPAlloc.Allocate<SymSymExpr>(); - new (data) SymSymExpr(lhs, op, rhs, t); - DataSet.InsertNode(data, InsertPos); - } - - return cast<SymSymExpr>(data); -} - -QualType SymbolConjured::getType(ASTContext&) const { - return T; -} - - -QualType SymbolDerived::getType(ASTContext& Ctx) const { - return R->getValueType(Ctx); -} - -QualType SymbolRegionValue::getType(ASTContext& C) const { - if (!T.isNull()) - return T; - - if (const TypedRegion* TR = dyn_cast<TypedRegion>(R)) - return TR->getValueType(C); - - return QualType(); -} - -SymbolManager::~SymbolManager() {} - -bool SymbolManager::canSymbolicate(QualType T) { - return Loc::IsLocType(T) || (T->isIntegerType() && T->isScalarType()); -} - -void SymbolReaper::markLive(SymbolRef sym) { - TheLiving.insert(sym); - TheDead.erase(sym); -} - -bool SymbolReaper::maybeDead(SymbolRef sym) { - if (isLive(sym)) - return false; - - TheDead.insert(sym); - return true; -} - -bool SymbolReaper::isLive(SymbolRef sym) { - if (TheLiving.count(sym)) - return true; - - if (const SymbolDerived *derived = dyn_cast<SymbolDerived>(sym)) { - if (isLive(derived->getParentSymbol())) { - markLive(sym); - return true; - } - return false; - } - - // Interogate the symbol. It may derive from an input value to - // the analyzed function/method. - return isa<SymbolRegionValue>(sym); -} - -bool SymbolReaper::isLive(const Stmt *Loc, const VarRegion *VR) const { - const StackFrameContext *SFC = VR->getStackFrame(); - return SFC == CurrentStackFrame ? Liveness.isLive(Loc, VR->getDecl()) : true; -} - -SymbolVisitor::~SymbolVisitor() {} |
