You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
134 lines
4.0 KiB
134 lines
4.0 KiB
//===--- State.h - State chain for the VM and AST Walker --------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Defines the base class of the interpreter and evaluator state.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CLANG_AST_INTERP_STATE_H
|
|
#define LLVM_CLANG_AST_INTERP_STATE_H
|
|
|
|
#include "clang/AST/ASTDiagnostic.h"
|
|
#include "clang/AST/Expr.h"
|
|
#include "clang/AST/OptionalDiagnostic.h"
|
|
|
|
namespace clang {
|
|
|
|
/// Kinds of access we can perform on an object, for diagnostics. Note that
|
|
/// we consider a member function call to be a kind of access, even though
|
|
/// it is not formally an access of the object, because it has (largely) the
|
|
/// same set of semantic restrictions.
|
|
enum AccessKinds {
|
|
AK_Read,
|
|
AK_ReadObjectRepresentation,
|
|
AK_Assign,
|
|
AK_Increment,
|
|
AK_Decrement,
|
|
AK_MemberCall,
|
|
AK_DynamicCast,
|
|
AK_TypeId,
|
|
AK_Construct,
|
|
AK_Destroy,
|
|
};
|
|
|
|
// The order of this enum is important for diagnostics.
|
|
enum CheckSubobjectKind {
|
|
CSK_Base,
|
|
CSK_Derived,
|
|
CSK_Field,
|
|
CSK_ArrayToPointer,
|
|
CSK_ArrayIndex,
|
|
CSK_Real,
|
|
CSK_Imag
|
|
};
|
|
|
|
namespace interp {
|
|
class Frame;
|
|
class SourceInfo;
|
|
|
|
/// Interface for the VM to interact with the AST walker's context.
|
|
class State {
|
|
public:
|
|
virtual ~State();
|
|
|
|
virtual bool checkingForUndefinedBehavior() const = 0;
|
|
virtual bool checkingPotentialConstantExpression() const = 0;
|
|
virtual bool noteUndefinedBehavior() = 0;
|
|
virtual bool keepEvaluatingAfterFailure() const = 0;
|
|
virtual Frame *getCurrentFrame() = 0;
|
|
virtual const Frame *getBottomFrame() const = 0;
|
|
virtual bool hasActiveDiagnostic() = 0;
|
|
virtual void setActiveDiagnostic(bool Flag) = 0;
|
|
virtual void setFoldFailureDiagnostic(bool Flag) = 0;
|
|
virtual Expr::EvalStatus &getEvalStatus() const = 0;
|
|
virtual ASTContext &getCtx() const = 0;
|
|
virtual bool hasPriorDiagnostic() = 0;
|
|
virtual unsigned getCallStackDepth() = 0;
|
|
|
|
public:
|
|
// Diagnose that the evaluation could not be folded (FF => FoldFailure)
|
|
OptionalDiagnostic
|
|
FFDiag(SourceLocation Loc,
|
|
diag::kind DiagId = diag::note_invalid_subexpr_in_const_expr,
|
|
unsigned ExtraNotes = 0);
|
|
|
|
OptionalDiagnostic
|
|
FFDiag(const Expr *E,
|
|
diag::kind DiagId = diag::note_invalid_subexpr_in_const_expr,
|
|
unsigned ExtraNotes = 0);
|
|
|
|
OptionalDiagnostic
|
|
FFDiag(const SourceInfo &SI,
|
|
diag::kind DiagId = diag::note_invalid_subexpr_in_const_expr,
|
|
unsigned ExtraNotes = 0);
|
|
|
|
/// Diagnose that the evaluation does not produce a C++11 core constant
|
|
/// expression.
|
|
///
|
|
/// FIXME: Stop evaluating if we're in EM_ConstantExpression or
|
|
/// EM_PotentialConstantExpression mode and we produce one of these.
|
|
OptionalDiagnostic
|
|
CCEDiag(SourceLocation Loc,
|
|
diag::kind DiagId = diag::note_invalid_subexpr_in_const_expr,
|
|
unsigned ExtraNotes = 0);
|
|
|
|
OptionalDiagnostic
|
|
CCEDiag(const Expr *E,
|
|
diag::kind DiagId = diag::note_invalid_subexpr_in_const_expr,
|
|
unsigned ExtraNotes = 0);
|
|
|
|
OptionalDiagnostic
|
|
CCEDiag(const SourceInfo &SI,
|
|
diag::kind DiagId = diag::note_invalid_subexpr_in_const_expr,
|
|
unsigned ExtraNotes = 0);
|
|
|
|
/// Add a note to a prior diagnostic.
|
|
OptionalDiagnostic Note(SourceLocation Loc, diag::kind DiagId);
|
|
|
|
/// Add a stack of notes to a prior diagnostic.
|
|
void addNotes(ArrayRef<PartialDiagnosticAt> Diags);
|
|
|
|
/// Directly reports a diagnostic message.
|
|
DiagnosticBuilder report(SourceLocation Loc, diag::kind DiagId);
|
|
|
|
const LangOptions &getLangOpts() const;
|
|
|
|
private:
|
|
void addCallStack(unsigned Limit);
|
|
|
|
PartialDiagnostic &addDiag(SourceLocation Loc, diag::kind DiagId);
|
|
|
|
OptionalDiagnostic diag(SourceLocation Loc, diag::kind DiagId,
|
|
unsigned ExtraNotes, bool IsCCEDiag);
|
|
};
|
|
|
|
} // namespace interp
|
|
} // namespace clang
|
|
|
|
#endif
|