C++ StackFrame::GetValueObjectForFrameVariable方法代码示例

  bool DoExecute(Args &command, CommandReturnObject &result) override {
    // No need to check "frame" for validity as eCommandRequiresFrame ensures it
    // is valid
    StackFrame *frame = m_exe_ctx.GetFramePtr();

    Stream &s = result.GetOutputStream();

    // Be careful about the stack frame, if any summary formatter runs code, it
    // might clear the StackFrameList
    // for the thread.  So hold onto a shared pointer to the frame so it stays
    // alive.

    VariableList *variable_list =
        frame->GetVariableList(m_option_variable.show_globals);

    VariableSP var_sp;
    ValueObjectSP valobj_sp;

    const char *name_cstr = nullptr;
    size_t idx;

    TypeSummaryImplSP summary_format_sp;
    if (!m_option_variable.summary.IsCurrentValueEmpty())
      DataVisualization::NamedSummaryFormats::GetSummaryFormat(
          ConstString(m_option_variable.summary.GetCurrentValue()),
          summary_format_sp);
    else if (!m_option_variable.summary_string.IsCurrentValueEmpty())
      summary_format_sp.reset(new StringSummaryFormat(
          TypeSummaryImpl::Flags(),
          m_option_variable.summary_string.GetCurrentValue()));

    DumpValueObjectOptions options(m_varobj_options.GetAsDumpOptions(
        eLanguageRuntimeDescriptionDisplayVerbosityFull, eFormatDefault,
        summary_format_sp));

    const SymbolContext &sym_ctx =
        frame->GetSymbolContext(eSymbolContextFunction);
    if (sym_ctx.function && sym_ctx.function->IsTopLevelFunction())
      m_option_variable.show_globals = true;

    if (variable_list) {
      const Format format = m_option_format.GetFormat();
      options.SetFormat(format);

      if (!command.empty()) {
        VariableList regex_var_list;

        // If we have any args to the variable command, we will make
        // variable objects from them...
        for (idx = 0; (name_cstr = command.GetArgumentAtIndex(idx)) != nullptr;
             ++idx) {
          if (m_option_variable.use_regex) {
            const size_t regex_start_index = regex_var_list.GetSize();
            llvm::StringRef name_str(name_cstr);
            RegularExpression regex(name_str);
            if (regex.Compile(name_str)) {
              size_t num_matches = 0;
              const size_t num_new_regex_vars =
                  variable_list->AppendVariablesIfUnique(regex, regex_var_list,
                                                         num_matches);
              if (num_new_regex_vars > 0) {
                for (size_t regex_idx = regex_start_index,
                            end_index = regex_var_list.GetSize();
                     regex_idx < end_index; ++regex_idx) {
                  var_sp = regex_var_list.GetVariableAtIndex(regex_idx);
                  if (var_sp) {
                    valobj_sp = frame->GetValueObjectForFrameVariable(
                        var_sp, m_varobj_options.use_dynamic);
                    if (valobj_sp) {
                      //                                            if (format
                      //                                            !=
                      //                                            eFormatDefault)
                      //                                                valobj_sp->SetFormat
                      //                                                (format);

                      std::string scope_string;
                      if (m_option_variable.show_scope)
                        scope_string = GetScopeString(var_sp).str();

                      if (!scope_string.empty())
                        s.PutCString(scope_string);

                      if (m_option_variable.show_decl &&
                          var_sp->GetDeclaration().GetFile()) {
                        bool show_fullpaths = false;
                        bool show_module = true;
                        if (var_sp->DumpDeclaration(&s, show_fullpaths,
                                                    show_module))
                          s.PutCString(": ");
                      }
                      valobj_sp->Dump(result.GetOutputStream(), options);
                    }
                  }
                }
              } else if (num_matches == 0) {
                result.GetErrorStream().Printf("error: no variables matched "
                                               "the regular expression '%s'.\n",
                                               name_cstr);
              }
            } else {
//.........这里部分代码省略.........

    virtual bool
    DoExecute (Args& command, CommandReturnObject &result)
    {
        ExecutionContext exe_ctx(m_interpreter.GetExecutionContext());
        StackFrame *frame = exe_ctx.GetFramePtr();
        if (frame == NULL)
        {
            result.AppendError ("you must be stopped in a valid stack frame to view frame variables.");
            result.SetStatus (eReturnStatusFailed);
            return false;
        }

        Stream &s = result.GetOutputStream();

        bool get_file_globals = true;
        
        // Be careful about the stack frame, if any summary formatter runs code, it might clear the StackFrameList
        // for the thread.  So hold onto a shared pointer to the frame so it stays alive.
        
        VariableList *variable_list = frame->GetVariableList (get_file_globals);

        VariableSP var_sp;
        ValueObjectSP valobj_sp;

        const char *name_cstr = NULL;
        size_t idx;
        
        TypeSummaryImplSP summary_format_sp;
        if (!m_option_variable.summary.IsCurrentValueEmpty())
            DataVisualization::NamedSummaryFormats::GetSummaryFormat(ConstString(m_option_variable.summary.GetCurrentValue()), summary_format_sp);
        else if (!m_option_variable.summary_string.IsCurrentValueEmpty())
            summary_format_sp.reset(new StringSummaryFormat(TypeSummaryImpl::Flags(),m_option_variable.summary_string.GetCurrentValue()));
        
        ValueObject::DumpValueObjectOptions options;
        
        options.SetMaximumPointerDepth(m_varobj_options.ptr_depth)
            .SetMaximumDepth(m_varobj_options.max_depth)
            .SetShowTypes(m_varobj_options.show_types)
            .SetShowLocation(m_varobj_options.show_location)
            .SetUseObjectiveC(m_varobj_options.use_objc)
            .SetUseDynamicType(m_varobj_options.use_dynamic)
            .SetUseSyntheticValue(m_varobj_options.use_synth)
            .SetFlatOutput(m_varobj_options.flat_output)
            .SetOmitSummaryDepth(m_varobj_options.no_summary_depth)
            .SetIgnoreCap(m_varobj_options.ignore_cap)
            .SetSummary(summary_format_sp);

        if (m_varobj_options.be_raw)
            options.SetRawDisplay(true);
        
        if (variable_list)
        {
            const Format format = m_option_format.GetFormat();
            options.SetFormat(format);

            if (command.GetArgumentCount() > 0)
            {
                VariableList regex_var_list;

                // If we have any args to the variable command, we will make
                // variable objects from them...
                for (idx = 0; (name_cstr = command.GetArgumentAtIndex(idx)) != NULL; ++idx)
                {
                    if (m_option_variable.use_regex)
                    {
                        const uint32_t regex_start_index = regex_var_list.GetSize();
                        RegularExpression regex (name_cstr);
                        if (regex.Compile(name_cstr))
                        {
                            size_t num_matches = 0;
                            const size_t num_new_regex_vars = variable_list->AppendVariablesIfUnique(regex, 
                                                                                                     regex_var_list, 
                                                                                                     num_matches);
                            if (num_new_regex_vars > 0)
                            {
                                for (uint32_t regex_idx = regex_start_index, end_index = regex_var_list.GetSize(); 
                                     regex_idx < end_index;
                                     ++regex_idx)
                                {
                                    var_sp = regex_var_list.GetVariableAtIndex (regex_idx);
                                    if (var_sp)
                                    {
                                        valobj_sp = frame->GetValueObjectForFrameVariable (var_sp, m_varobj_options.use_dynamic);
                                        if (valobj_sp)
                                        {
//                                            if (format != eFormatDefault)
//                                                valobj_sp->SetFormat (format);
                                            
                                            if (m_option_variable.show_decl && var_sp->GetDeclaration ().GetFile())
                                            {
                                                bool show_fullpaths = false;
                                                bool show_module = true;
                                                if (var_sp->DumpDeclaration(&s, show_fullpaths, show_module))
                                                    s.PutCString (": ");
                                            }
                                            ValueObject::DumpValueObject (result.GetOutputStream(), 
                                                                          valobj_sp.get(),
                                                                          options);
                                        }
                                    }
//.........这里部分代码省略.........

SBValue
SBFrame::FindVariable (const char *name, lldb::DynamicValueType use_dynamic)
{
    LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    VariableSP var_sp;
    SBValue sb_value;

    if (name == NULL || name[0] == '\0')
    {
        if (log)
            log->Printf ("SBFrame::FindVariable called with empty name");
        return sb_value;
    }
    
    ValueObjectSP value_sp;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = NULL;
    Target *target = exe_ctx.GetTargetPtr();
    Process *process = exe_ctx.GetProcessPtr();
    if (target && process)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&process->GetRunLock()))
        {
            frame = exe_ctx.GetFramePtr();
            if (frame)
            {
                VariableList variable_list;
                SymbolContext sc (frame->GetSymbolContext (eSymbolContextBlock));

                if (sc.block)
                {
                    const bool can_create = true;
                    const bool get_parent_variables = true;
                    const bool stop_if_block_is_inlined_function = true;
                    
                    if (sc.block->AppendVariables (can_create, 
                                                   get_parent_variables,
                                                   stop_if_block_is_inlined_function,
                                                   &variable_list))
                    {
                        var_sp = variable_list.FindVariable (ConstString(name));
                    }
                }

                if (var_sp)
                {
                    value_sp = frame->GetValueObjectForFrameVariable(var_sp, eNoDynamicValues);
                    sb_value.SetSP(value_sp, use_dynamic);
                }
            }
            else
            {
                if (log)
                    log->Printf ("SBFrame::FindVariable () => error: could not reconstruct frame object for this SBFrame.");
            }
        }
        else
        {
            if (log)
                log->Printf ("SBFrame::FindVariable () => error: process is running");
        }
    }
    
    if (log)
        log->Printf ("SBFrame(%p)::FindVariable (name=\"%s\") => SBValue(%p)", 
                     frame, name, value_sp.get());

    return sb_value;
}