C++ EvaluateExpressionOptions::DoesIgnoreBreakpoints方法代码示例

ThreadPlanCallFunction::ThreadPlanCallFunction(Thread &thread,
                                               const Address &function,
                                               const EvaluateExpressionOptions &options) :
    ThreadPlan(ThreadPlan::eKindCallFunction, "Call function plan", thread, eVoteNoOpinion, eVoteNoOpinion),
    m_valid(false),
    m_stop_other_threads(options.GetStopOthers()),
    m_unwind_on_error(options.DoesUnwindOnError()),
    m_ignore_breakpoints(options.DoesIgnoreBreakpoints()),
    m_debug_execution(options.GetDebug()),
    m_trap_exceptions(options.GetTrapExceptions()),
    m_function_addr(function),
    m_function_sp(0),
    m_takedown_done(false),
    m_should_clear_objc_exception_bp(false),
    m_should_clear_cxx_exception_bp(false),
    m_stop_address(LLDB_INVALID_ADDRESS),
    m_return_type(CompilerType())
{
}

//.........这里部分代码省略.........
            llvm::SmallVector <lldb::addr_t, 3> args;

            if (m_needs_object_ptr) {
                args.push_back(object_ptr);
                if (m_objectivec)
                    args.push_back(cmd_ptr);
            }

            args.push_back(struct_address);
         
            ThreadPlanCallUserExpression *user_expression_plan = 
                    new ThreadPlanCallUserExpression (exe_ctx.GetThreadRef(),
                                                      wrapper_address, 
                                                      args,
                                                      options,
                                                      shared_ptr_to_me);
            lldb::ThreadPlanSP call_plan_sp(user_expression_plan);

            if (!call_plan_sp || !call_plan_sp->ValidatePlan (&error_stream))
                return lldb::eExpressionSetupError;

            lldb::addr_t function_stack_pointer = user_expression_plan->GetFunctionStackPointer();

            function_stack_bottom = function_stack_pointer - HostInfo::GetPageSize();
            function_stack_top = function_stack_pointer;

            if (log)
                log->Printf("-- [ClangUserExpression::Execute] Execution of expression begins --");

            if (exe_ctx.GetProcessPtr())
                exe_ctx.GetProcessPtr()->SetRunningUserExpression(true);

            lldb::ExpressionResults execution_result = exe_ctx.GetProcessRef().RunThreadPlan (exe_ctx,
                                                                                       call_plan_sp,
                                                                                       options,
                                                                                       error_stream);

            if (exe_ctx.GetProcessPtr())
                exe_ctx.GetProcessPtr()->SetRunningUserExpression(false);

            if (log)
                log->Printf("-- [ClangUserExpression::Execute] Execution of expression completed --");

            if (execution_result == lldb::eExpressionInterrupted || execution_result == lldb::eExpressionHitBreakpoint)
            {
                const char *error_desc = NULL;

                if (call_plan_sp)
                {
                    lldb::StopInfoSP real_stop_info_sp = call_plan_sp->GetRealStopInfo();
                    if (real_stop_info_sp)
                        error_desc = real_stop_info_sp->GetDescription();
                }
                if (error_desc)
                    error_stream.Printf ("Execution was interrupted, reason: %s.", error_desc);
                else
                    error_stream.PutCString ("Execution was interrupted.");

                if ((execution_result == lldb::eExpressionInterrupted && options.DoesUnwindOnError())
                    || (execution_result == lldb::eExpressionHitBreakpoint && options.DoesIgnoreBreakpoints()))
                    error_stream.PutCString ("\nThe process has been returned to the state before expression evaluation.");
                else
                {
                    if (execution_result == lldb::eExpressionHitBreakpoint)
                        user_expression_plan->TransferExpressionOwnership();
                    error_stream.PutCString ("\nThe process has been left at the point where it was interrupted, "
                                             "use \"thread return -x\" to return to the state before expression evaluation.");
                }

                return execution_result;
            }
            else if (execution_result == lldb::eExpressionStoppedForDebug)
            {
                    error_stream.PutCString ("Execution was halted at the first instruction of the expression "
                                             "function because \"debug\" was requested.\n"
                                             "Use \"thread return -x\" to return to the state before expression evaluation.");
                    return execution_result;
            }
            else if (execution_result != lldb::eExpressionCompleted)
            {
                error_stream.Printf ("Couldn't execute function; result was %s\n", Process::ExecutionResultAsCString (execution_result));
                return execution_result;
            }
        }

        if  (FinalizeJITExecution (error_stream, exe_ctx, result, function_stack_bottom, function_stack_top))
        {
            return lldb::eExpressionCompleted;
        }
        else
        {
            return lldb::eExpressionResultUnavailable;
        }
    }
    else
    {
        error_stream.Printf("Expression can't be run, because there is no JIT compiled function");
        return lldb::eExpressionSetupError;
    }
}

//.........这里部分代码省略.........
        exe_ctx.GetProcessPtr()->SetRunningUserExpression(true);

      lldb::ExpressionResults execution_result =
          exe_ctx.GetProcessRef().RunThreadPlan(exe_ctx, call_plan_sp, options,
                                                diagnostic_manager);

      if (exe_ctx.GetProcessPtr())
        exe_ctx.GetProcessPtr()->SetRunningUserExpression(false);

      if (log)
        log->Printf("-- [UserExpression::Execute] Execution of expression "
                    "completed --");

      if (execution_result == lldb::eExpressionInterrupted ||
          execution_result == lldb::eExpressionHitBreakpoint) {
        const char *error_desc = NULL;

        if (call_plan_sp) {
          lldb::StopInfoSP real_stop_info_sp = call_plan_sp->GetRealStopInfo();
          if (real_stop_info_sp)
            error_desc = real_stop_info_sp->GetDescription();
        }
        if (error_desc)
          diagnostic_manager.Printf(eDiagnosticSeverityError,
                                    "Execution was interrupted, reason: %s.",
                                    error_desc);
        else
          diagnostic_manager.PutCString(eDiagnosticSeverityError,
                                        "Execution was interrupted.");

        if ((execution_result == lldb::eExpressionInterrupted &&
             options.DoesUnwindOnError()) ||
            (execution_result == lldb::eExpressionHitBreakpoint &&
             options.DoesIgnoreBreakpoints()))
          diagnostic_manager.AppendMessageToDiagnostic(
              "The process has been returned to the state before expression "
              "evaluation.");
        else {
          if (execution_result == lldb::eExpressionHitBreakpoint)
            user_expression_plan->TransferExpressionOwnership();
          diagnostic_manager.AppendMessageToDiagnostic(
              "The process has been left at the point where it was "
              "interrupted, "
              "use \"thread return -x\" to return to the state before "
              "expression evaluation.");
        }

        return execution_result;
      } else if (execution_result == lldb::eExpressionStoppedForDebug) {
        diagnostic_manager.PutCString(
            eDiagnosticSeverityRemark,
            "Execution was halted at the first instruction of the expression "
            "function because \"debug\" was requested.\n"
            "Use \"thread return -x\" to return to the state before expression "
            "evaluation.");
        return execution_result;
      } else if (execution_result == lldb::eExpressionCompleted) {
        if (user_expression_plan->HitErrorBackstop()) {
          // This should only happen in Playground & REPL.  The code threw an
          // uncaught error, so we already rolled up
          // the stack past our execution point.  We're not going to be able to
          // get any or our expression variables
          // since they've already gone out of scope.  But at least we can
          // gather the error result...
          if (user_expression_plan->GetReturnValueObject() &&
              user_expression_plan->GetReturnValueObject()