3d0c616ce3
Move the Variables struct out of DAP.h and into its own file to reduce the complexity of the latter. This PR also makes the members that are implementation details private and adds a handful of basic unit tests.
106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
//===-- Variables.cpp ---------------------------------------------------*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Variables.h"
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#include "JSONUtils.h"
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using namespace lldb_dap;
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lldb::SBValueList *Variables::GetTopLevelScope(int64_t variablesReference) {
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switch (variablesReference) {
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case VARREF_LOCALS:
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return &locals;
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case VARREF_GLOBALS:
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return &globals;
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case VARREF_REGS:
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return ®isters;
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default:
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return nullptr;
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}
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}
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void Variables::Clear() {
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locals.Clear();
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globals.Clear();
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registers.Clear();
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m_referencedvariables.clear();
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}
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int64_t Variables::GetNewVariableReference(bool is_permanent) {
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if (is_permanent)
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return m_next_permanent_var_ref++;
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return m_next_temporary_var_ref++;
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}
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bool Variables::IsPermanentVariableReference(int64_t var_ref) {
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return var_ref >= PermanentVariableStartIndex;
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}
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lldb::SBValue Variables::GetVariable(int64_t var_ref) const {
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if (IsPermanentVariableReference(var_ref)) {
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auto pos = m_referencedpermanent_variables.find(var_ref);
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if (pos != m_referencedpermanent_variables.end())
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return pos->second;
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} else {
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auto pos = m_referencedvariables.find(var_ref);
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if (pos != m_referencedvariables.end())
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return pos->second;
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}
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return lldb::SBValue();
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}
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int64_t Variables::InsertVariable(lldb::SBValue variable, bool is_permanent) {
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int64_t var_ref = GetNewVariableReference(is_permanent);
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if (is_permanent)
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m_referencedpermanent_variables.insert(std::make_pair(var_ref, variable));
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else
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m_referencedvariables.insert(std::make_pair(var_ref, variable));
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return var_ref;
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}
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lldb::SBValue Variables::FindVariable(uint64_t variablesReference,
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llvm::StringRef name) {
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lldb::SBValue variable;
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if (lldb::SBValueList *top_scope = GetTopLevelScope(variablesReference)) {
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bool is_duplicated_variable_name = name.contains(" @");
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// variablesReference is one of our scopes, not an actual variable it is
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// asking for a variable in locals or globals or registers
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int64_t end_idx = top_scope->GetSize();
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// Searching backward so that we choose the variable in closest scope
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// among variables of the same name.
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for (int64_t i = end_idx - 1; i >= 0; --i) {
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lldb::SBValue curr_variable = top_scope->GetValueAtIndex(i);
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std::string variable_name = CreateUniqueVariableNameForDisplay(
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curr_variable, is_duplicated_variable_name);
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if (variable_name == name) {
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variable = curr_variable;
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break;
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}
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}
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} else {
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// This is not under the globals or locals scope, so there are no
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// duplicated names.
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// We have a named item within an actual variable so we need to find it
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// withing the container variable by name.
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lldb::SBValue container = GetVariable(variablesReference);
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variable = container.GetChildMemberWithName(name.data());
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if (!variable.IsValid()) {
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if (name.starts_with("[")) {
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llvm::StringRef index_str(name.drop_front(1));
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uint64_t index = 0;
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if (!index_str.consumeInteger(0, index)) {
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if (index_str == "]")
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variable = container.GetChildAtIndex(index);
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}
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}
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}
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}
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return variable;
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}
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