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//===-- Variables.cpp ---------------------------------------------------*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "Variables.h"
#include "JSONUtils.h"
using namespace lldb_dap;
lldb::SBValueList *Variables::GetTopLevelScope(int64_t variablesReference) {
switch (variablesReference) {
case VARREF_LOCALS:
return &locals;
case VARREF_GLOBALS:
return &globals;
case VARREF_REGS:
return ®isters;
default:
return nullptr;
}
}
void Variables::Clear() {
locals.Clear();
globals.Clear();
registers.Clear();
m_referencedvariables.clear();
}
int64_t Variables::GetNewVariableReference(bool is_permanent) {
if (is_permanent)
return m_next_permanent_var_ref++;
return m_next_temporary_var_ref++;
}
bool Variables::IsPermanentVariableReference(int64_t var_ref) {
return var_ref >= PermanentVariableStartIndex;
}
lldb::SBValue Variables::GetVariable(int64_t var_ref) const {
if (IsPermanentVariableReference(var_ref)) {
auto pos = m_referencedpermanent_variables.find(var_ref);
if (pos != m_referencedpermanent_variables.end())
return pos->second;
} else {
auto pos = m_referencedvariables.find(var_ref);
if (pos != m_referencedvariables.end())
return pos->second;
}
return lldb::SBValue();
}
int64_t Variables::InsertVariable(lldb::SBValue variable, bool is_permanent) {
int64_t var_ref = GetNewVariableReference(is_permanent);
if (is_permanent)
m_referencedpermanent_variables.insert(std::make_pair(var_ref, variable));
else
m_referencedvariables.insert(std::make_pair(var_ref, variable));
return var_ref;
}
lldb::SBValue Variables::FindVariable(uint64_t variablesReference,
llvm::StringRef name) {
lldb::SBValue variable;
if (lldb::SBValueList *top_scope = GetTopLevelScope(variablesReference)) {
bool is_duplicated_variable_name = name.contains(" @");
// variablesReference is one of our scopes, not an actual variable it is
// asking for a variable in locals or globals or registers
int64_t end_idx = top_scope->GetSize();
// Searching backward so that we choose the variable in closest scope
// among variables of the same name.
for (int64_t i = end_idx - 1; i >= 0; --i) {
lldb::SBValue curr_variable = top_scope->GetValueAtIndex(i);
std::string variable_name = CreateUniqueVariableNameForDisplay(
curr_variable, is_duplicated_variable_name);
if (variable_name == name) {
variable = curr_variable;
break;
}
}
} else {
// This is not under the globals or locals scope, so there are no
// duplicated names.
// We have a named item within an actual variable so we need to find it
// withing the container variable by name.
lldb::SBValue container = GetVariable(variablesReference);
variable = container.GetChildMemberWithName(name.data());
if (!variable.IsValid()) {
if (name.starts_with("[")) {
llvm::StringRef index_str(name.drop_front(1));
uint64_t index = 0;
if (!index_str.consumeInteger(0, index)) {
if (index_str == "]")
variable = container.GetChildAtIndex(index);
}
}
}
}
return variable;
}
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