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//===-- Variables.h -----------------------------------------------------*-===//
//
// 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 LLDB_TOOLS_LLDB_DAP_VARIABLES_H
#define LLDB_TOOLS_LLDB_DAP_VARIABLES_H
#include "lldb/API/SBValue.h"
#include "lldb/API/SBValueList.h"
#include "llvm/ADT/DenseMap.h"
#define VARREF_FIRST_VAR_IDX (int64_t)4
#define VARREF_LOCALS (int64_t)1
#define VARREF_GLOBALS (int64_t)2
#define VARREF_REGS (int64_t)3
namespace lldb_dap {
struct Variables {
lldb::SBValueList locals;
lldb::SBValueList globals;
lldb::SBValueList registers;
/// Check if \p var_ref points to a variable that should persist for the
/// entire duration of the debug session, e.g. repl expandable variables
static bool IsPermanentVariableReference(int64_t var_ref);
/// \return a new variableReference.
/// Specify is_permanent as true for variable that should persist entire
/// debug session.
int64_t GetNewVariableReference(bool is_permanent);
/// \return the expandable variable corresponding with variableReference
/// value of \p value.
/// If \p var_ref is invalid an empty SBValue is returned.
lldb::SBValue GetVariable(int64_t var_ref) const;
/// Insert a new \p variable.
/// \return variableReference assigned to this expandable variable.
int64_t InsertVariable(lldb::SBValue variable, bool is_permanent);
lldb::SBValueList *GetTopLevelScope(int64_t variablesReference);
lldb::SBValue FindVariable(uint64_t variablesReference, llvm::StringRef name);
/// Clear all scope variables and non-permanent expandable variables.
void Clear();
private:
/// Variable_reference start index of permanent expandable variable.
static constexpr int64_t PermanentVariableStartIndex = (1ll << 32);
/// Variables that are alive in this stop state.
/// Will be cleared when debuggee resumes.
llvm::DenseMap<int64_t, lldb::SBValue> m_referencedvariables;
/// Variables that persist across entire debug session.
/// These are the variables evaluated from debug console REPL.
llvm::DenseMap<int64_t, lldb::SBValue> m_referencedpermanent_variables;
int64_t m_next_temporary_var_ref{VARREF_FIRST_VAR_IDX};
int64_t m_next_permanent_var_ref{PermanentVariableStartIndex};
};
} // namespace lldb_dap
#endif
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