Variable.h

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//===-- Variable.h -----------------------------------------------*- 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
//
//===----------------------------------------------------------------------===//

#ifndef liblldb_Variable_h_
#define liblldb_Variable_h_

#include "lldb/Core/Mangled.h"
#include "lldb/Expression/DWARFExpression.h"
#include "lldb/Symbol/Declaration.h"
#include "lldb/Utility/CompletionRequest.h"
#include "lldb/Utility/RangeMap.h"
#include "lldb/Utility/UserID.h"
#include "lldb/lldb-enumerations.h"
#include "lldb/lldb-private.h"
#include <memory>
#include <vector>

namespace lldb_private {

class Variable : public UserID, public std::enable_shared_from_this<Variable> {
public:
  typedef RangeVector<lldb::addr_t, lldb::addr_t> RangeList;

  // Constructors and Destructors
  Variable(lldb::user_id_t uid, const char *name,
           const char
               *mangled, // The mangled or fully qualified name of the variable.
           const lldb::SymbolFileTypeSP &symfile_type_sp,
           lldb::ValueType scope, SymbolContextScope *owner_scope,
           const RangeList &scope_range, Declaration *decl,
           const DWARFExpression &location, bool external, bool artificial,
           bool static_member = false);

  virtual ~Variable();

  void Dump(Stream *s, bool show_context) const;

  bool DumpDeclaration(Stream *s, bool show_fullpaths, bool show_module);

  const Declaration &GetDeclaration() const { return m_declaration; }

  ConstString GetName() const;

  ConstString GetUnqualifiedName() const;

  SymbolContextScope *GetSymbolContextScope() const { return m_owner_scope; }

  // Since a variable can have a basename "i" and also a mangled named
  // "_ZN12_GLOBAL__N_11iE" and a demangled mangled name "(anonymous
  // namespace)::i", this function will allow a generic match function that can
  // be called by commands and expression parsers to make sure we match
  // anything we come across.
  bool NameMatches(ConstString name) const;

  bool NameMatches(const RegularExpression &regex) const;

  Type *GetType();

  lldb::LanguageType GetLanguage() const;

  lldb::ValueType GetScope() const { return m_scope; }

  bool IsExternal() const { return m_external; }

  bool IsArtificial() const { return m_artificial; }

  bool IsStaticMember() const { return m_static_member; }

  DWARFExpression &LocationExpression() { return m_location; }

  const DWARFExpression &LocationExpression() const { return m_location; }

  bool DumpLocationForAddress(Stream *s, const Address &address);

  size_t MemorySize() const;

  void CalculateSymbolContext(SymbolContext *sc);

  bool IsInScope(StackFrame *frame);

  bool LocationIsValidForFrame(StackFrame *frame);

  bool LocationIsValidForAddress(const Address &address);

  bool GetLocationIsConstantValueData() const { return m_loc_is_const_data; }

  void SetLocationIsConstantValueData(bool b) { m_loc_is_const_data = b; }

  typedef size_t (*GetVariableCallback)(void *baton, const char *name,
                                        VariableList &var_list);

  static Status GetValuesForVariableExpressionPath(
      llvm::StringRef variable_expr_path, ExecutionContextScope *scope,
      GetVariableCallback callback, void *baton, VariableList &variable_list,
      ValueObjectList &valobj_list);

  static size_t AutoComplete(const ExecutionContext &exe_ctx,
                             CompletionRequest &request);

  CompilerDeclContext GetDeclContext();

  CompilerDecl GetDecl();

protected:
  ConstString m_name; // The basename of the variable (no namespaces)
  Mangled m_mangled;  // The mangled name of the variable
  lldb::SymbolFileTypeSP m_symfile_type_sp; // The type pointer of the variable
                                            // (int, struct, class, etc)
  lldb::ValueType m_scope;                  // global, parameter, local
  SymbolContextScope
      *m_owner_scope; // The symbol file scope that this variable was defined in
  RangeList m_scope_range; // The list of ranges inside the owner's scope where
                           // this variable is valid
  Declaration m_declaration;  // Declaration location for this item.
  DWARFExpression m_location; // The location of this variable that can be fed
                              // to DWARFExpression::Evaluate()
  uint8_t m_external : 1,     // Visible outside the containing compile unit?
      m_artificial : 1, // Non-zero if the variable is not explicitly declared
                        // in source
      m_loc_is_const_data : 1, // The m_location expression contains the
                               // constant variable value data, not a DWARF
                               // location
      m_static_member : 1; // Non-zero if variable is static member of a class
                           // or struct.
private:
  Variable(const Variable &rhs);
  Variable &operator=(const Variable &rhs);
};

} // namespace lldb_private

#endif // liblldb_Variable_h_