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77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
//===- UninitializedValues.h - unintialized values analysis ----*- C++ --*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the interface for the Unintialized Values analysis,
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// a flow-sensitive analysis that detects when variable values are unintialized.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_UNITVALS_H
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#define LLVM_CLANG_UNITVALS_H
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#include "clang/Analysis/Support/BlkExprDeclBitVector.h"
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#include "clang/Analysis/FlowSensitive/DataflowValues.h"
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namespace clang {
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class BlockVarDecl;
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class Expr;
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class DeclRefExpr;
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class VarDecl;
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/// UninitializedValues_ValueTypes - Utility class to wrap type declarations
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/// for dataflow values and dataflow analysis state for the
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/// Unitialized Values analysis.
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class UninitializedValues_ValueTypes {
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public:
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struct ObserverTy;
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struct AnalysisDataTy : public StmtDeclBitVector_Types::AnalysisDataTy {
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AnalysisDataTy() : Observer(NULL), FullUninitTaint(true) {}
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virtual ~AnalysisDataTy() {}
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ObserverTy* Observer;
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bool FullUninitTaint;
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};
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typedef StmtDeclBitVector_Types::ValTy ValTy;
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//===--------------------------------------------------------------------===//
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// ObserverTy - Observer for querying DeclRefExprs that use an uninitalized
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// value.
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//===--------------------------------------------------------------------===//
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struct ObserverTy {
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virtual ~ObserverTy();
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virtual void ObserveDeclRefExpr(ValTy& Val, AnalysisDataTy& AD,
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DeclRefExpr* DR, VarDecl* VD) = 0;
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};
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};
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/// UninitializedValues - Objects of this class encapsulate dataflow analysis
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/// information regarding what variable declarations in a function are
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/// potentially unintialized.
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class UninitializedValues :
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public DataflowValues<UninitializedValues_ValueTypes> {
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public:
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typedef UninitializedValues_ValueTypes::ObserverTy ObserverTy;
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UninitializedValues(CFG &cfg) { getAnalysisData().setCFG(cfg); }
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/// IntializeValues - Create initial dataflow values and meta data for
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/// a given CFG. This is intended to be called by the dataflow solver.
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void InitializeValues(const CFG& cfg);
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};
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void CheckUninitializedValues(CFG& cfg, ASTContext& Ctx, Diagnostic& Diags,
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bool FullUninitTaint=false);
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} // end namespace clang
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#endif
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