예제 #1
0
lldb::ExpressionResults
UserExpression::Execute(DiagnosticManager &diagnostic_manager,
                        ExecutionContext &exe_ctx,
                        const EvaluateExpressionOptions &options,
                        lldb::UserExpressionSP &shared_ptr_to_me,
                        lldb::ExpressionVariableSP &result_var)
{
    lldb::ExpressionResults expr_result = DoExecute(diagnostic_manager, exe_ctx, options, shared_ptr_to_me, result_var);
    Target *target = exe_ctx.GetTargetPtr();
    if (options.GetResultIsInternal() && result_var && target)
    {
        target->GetPersistentExpressionStateForLanguage(m_language)->RemovePersistentVariable (result_var);
    }
    return expr_result;
}
예제 #2
0
lldb::ExpressionResults
ClangUserExpression::Evaluate (ExecutionContext &exe_ctx,
                               const EvaluateExpressionOptions& options,
                               const char *expr_cstr,
                               const char *expr_prefix,
                               lldb::ValueObjectSP &result_valobj_sp,
                               Error &error)
{
    Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_EXPRESSIONS | LIBLLDB_LOG_STEP));

    lldb_private::ExecutionPolicy execution_policy = options.GetExecutionPolicy();
    const lldb::LanguageType language = options.GetLanguage();
    const ResultType desired_type = options.DoesCoerceToId() ? ClangUserExpression::eResultTypeId : ClangUserExpression::eResultTypeAny;
    lldb::ExpressionResults execution_results = lldb::eExpressionSetupError;

    Process *process = exe_ctx.GetProcessPtr();

    if (process == NULL || process->GetState() != lldb::eStateStopped)
    {
        if (execution_policy == eExecutionPolicyAlways)
        {
            if (log)
                log->Printf("== [ClangUserExpression::Evaluate] Expression may not run, but is not constant ==");

            error.SetErrorString ("expression needed to run but couldn't");

            return execution_results;
        }
    }

    if (process == NULL || !process->CanJIT())
        execution_policy = eExecutionPolicyNever;

    ClangUserExpressionSP user_expression_sp (new ClangUserExpression (expr_cstr, expr_prefix, language, desired_type));

    StreamString error_stream;

    if (log)
        log->Printf("== [ClangUserExpression::Evaluate] Parsing expression %s ==", expr_cstr);

    const bool keep_expression_in_memory = true;
    const bool generate_debug_info = options.GetGenerateDebugInfo();

    if (options.InvokeCancelCallback (lldb::eExpressionEvaluationParse))
    {
        error.SetErrorString ("expression interrupted by callback before parse");
        result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error);
        return lldb::eExpressionInterrupted;
    }

    if (!user_expression_sp->Parse (error_stream,
                                    exe_ctx,
                                    execution_policy,
                                    keep_expression_in_memory,
                                    generate_debug_info))
    {
        if (error_stream.GetString().empty())
            error.SetExpressionError (lldb::eExpressionParseError, "expression failed to parse, unknown error");
        else
            error.SetExpressionError (lldb::eExpressionParseError, error_stream.GetString().c_str());
    }
    else
    {
        lldb::ClangExpressionVariableSP expr_result;

        if (execution_policy == eExecutionPolicyNever &&
            !user_expression_sp->CanInterpret())
        {
            if (log)
                log->Printf("== [ClangUserExpression::Evaluate] Expression may not run, but is not constant ==");

            if (error_stream.GetString().empty())
                error.SetExpressionError (lldb::eExpressionSetupError, "expression needed to run but couldn't");
        }
        else
        {
            if (options.InvokeCancelCallback (lldb::eExpressionEvaluationExecution))
            {
                error.SetExpressionError (lldb::eExpressionInterrupted, "expression interrupted by callback before execution");
                result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error);
                return lldb::eExpressionInterrupted;
            }

            error_stream.GetString().clear();

            if (log)
                log->Printf("== [ClangUserExpression::Evaluate] Executing expression ==");

            execution_results = user_expression_sp->Execute (error_stream,
                                                             exe_ctx,
                                                             options,
                                                             user_expression_sp,
                                                             expr_result);

            if (options.GetResultIsInternal())
            {
                process->GetTarget().GetPersistentVariables().RemovePersistentVariable (expr_result);
            }

            if (execution_results != lldb::eExpressionCompleted)
            {
                if (log)
                    log->Printf("== [ClangUserExpression::Evaluate] Execution completed abnormally ==");

                if (error_stream.GetString().empty())
                    error.SetExpressionError (execution_results, "expression failed to execute, unknown error");
                else
                    error.SetExpressionError (execution_results, error_stream.GetString().c_str());
            }
            else
            {
                if (expr_result)
                {
                    result_valobj_sp = expr_result->GetValueObject();

                    if (log)
                        log->Printf("== [ClangUserExpression::Evaluate] Execution completed normally with result %s ==",
                                    result_valobj_sp->GetValueAsCString());
                }
                else
                {
                    if (log)
                        log->Printf("== [ClangUserExpression::Evaluate] Execution completed normally with no result ==");

                    error.SetError(ClangUserExpression::kNoResult, lldb::eErrorTypeGeneric);
                }
            }
        }
    }

    if (options.InvokeCancelCallback(lldb::eExpressionEvaluationComplete))
    {
        error.SetExpressionError (lldb::eExpressionInterrupted, "expression interrupted by callback after complete");
        return lldb::eExpressionInterrupted;
    }

    if (result_valobj_sp.get() == NULL)
    {
        result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error);
    }

    return execution_results;
}
예제 #3
0
lldb::ExpressionResults
UserExpression::Evaluate (ExecutionContext &exe_ctx,
                               const EvaluateExpressionOptions& options,
                               const char *expr_cstr,
                               const char *expr_prefix,
                               lldb::ValueObjectSP &result_valobj_sp,
                               Error &error,
                               uint32_t line_offset,
                               lldb::ModuleSP *jit_module_sp_ptr)
{
    Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_EXPRESSIONS | LIBLLDB_LOG_STEP));

    lldb_private::ExecutionPolicy execution_policy = options.GetExecutionPolicy();
    lldb::LanguageType language = options.GetLanguage();
    const ResultType desired_type = options.DoesCoerceToId() ? UserExpression::eResultTypeId : UserExpression::eResultTypeAny;
    lldb::ExpressionResults execution_results = lldb::eExpressionSetupError;
    
    Target *target = exe_ctx.GetTargetPtr();
    if (!target)
    {
        if (log)
            log->Printf("== [UserExpression::Evaluate] Passed a NULL target, can't run expressions.");
        return lldb::eExpressionSetupError;
    }

    Process *process = exe_ctx.GetProcessPtr();

    if (process == NULL || process->GetState() != lldb::eStateStopped)
    {
        if (execution_policy == eExecutionPolicyAlways)
        {
            if (log)
                log->Printf("== [UserExpression::Evaluate] Expression may not run, but is not constant ==");

            error.SetErrorString ("expression needed to run but couldn't");

            return execution_results;
        }
    }

    if (process == NULL || !process->CanJIT())
        execution_policy = eExecutionPolicyNever;

    const char *full_prefix = NULL;
    const char *option_prefix = options.GetPrefix();
    std::string full_prefix_storage;
    if (expr_prefix && option_prefix)
    {
        full_prefix_storage.assign(expr_prefix);
        full_prefix_storage.append(option_prefix);
        if (!full_prefix_storage.empty())
            full_prefix = full_prefix_storage.c_str();
    }
    else if (expr_prefix)
        full_prefix = expr_prefix;
    else
        full_prefix = option_prefix;
    
    // If the language was not specified in the expression command,
    // set it to the language in the target's properties if
    // specified, else default to the langage for the frame.
    if (language == lldb::eLanguageTypeUnknown)
    {
        if (target->GetLanguage() != lldb::eLanguageTypeUnknown)
            language = target->GetLanguage();
        else if (StackFrame *frame = exe_ctx.GetFramePtr())
            language = frame->GetLanguage();
    }


    // If the language was not specified in the expression command,
    // set it to the language in the target's properties if
    // specified, else default to the langage for the frame.
    if (language == lldb::eLanguageTypeUnknown)
    {
        if (target->GetLanguage() != lldb::eLanguageTypeUnknown)
            language = target->GetLanguage();
        else if (StackFrame *frame = exe_ctx.GetFramePtr())
            language = frame->GetLanguage();
    }

    lldb::UserExpressionSP user_expression_sp(target->GetUserExpressionForLanguage (expr_cstr,
                                                                                    full_prefix,
                                                                                    language,
                                                                                    desired_type,
                                                                                    options,
                                                                                    error));
    if (error.Fail())
    {
        if (log)
            log->Printf ("== [UserExpression::Evaluate] Getting expression: %s ==", error.AsCString());
        return lldb::eExpressionSetupError;
    }
 
    StreamString error_stream;

    if (log)
        log->Printf("== [UserExpression::Evaluate] Parsing expression %s ==", expr_cstr);

    const bool keep_expression_in_memory = true;
    const bool generate_debug_info = options.GetGenerateDebugInfo();

    if (options.InvokeCancelCallback (lldb::eExpressionEvaluationParse))
    {
        error.SetErrorString ("expression interrupted by callback before parse");
        result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error);
        return lldb::eExpressionInterrupted;
    }

    if (!user_expression_sp->Parse (error_stream,
                                    exe_ctx,
                                    execution_policy,
                                    keep_expression_in_memory,
                                    generate_debug_info,
                                    0))
    {
        execution_results = lldb::eExpressionParseError;
        if (error_stream.GetString().empty())
            error.SetExpressionError (execution_results, "expression failed to parse, unknown error");
        else
            error.SetExpressionError (execution_results, error_stream.GetString().c_str());
    }
    else
    {
        // If a pointer to a lldb::ModuleSP was passed in, return the JIT'ed module if one was created
        if (jit_module_sp_ptr)
            *jit_module_sp_ptr = user_expression_sp->GetJITModule();

        lldb::ExpressionVariableSP expr_result;

        if (execution_policy == eExecutionPolicyNever &&
            !user_expression_sp->CanInterpret())
        {
            if (log)
                log->Printf("== [UserExpression::Evaluate] Expression may not run, but is not constant ==");

            if (error_stream.GetString().empty())
                error.SetExpressionError (lldb::eExpressionSetupError, "expression needed to run but couldn't");
        }
        else
        {
            if (options.InvokeCancelCallback (lldb::eExpressionEvaluationExecution))
            {
                error.SetExpressionError (lldb::eExpressionInterrupted, "expression interrupted by callback before execution");
                result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error);
                return lldb::eExpressionInterrupted;
            }

            error_stream.GetString().clear();

            if (log)
                log->Printf("== [UserExpression::Evaluate] Executing expression ==");

            execution_results = user_expression_sp->Execute (error_stream,
                                                             exe_ctx,
                                                             options,
                                                             user_expression_sp,
                                                             expr_result);

            if (options.GetResultIsInternal() && expr_result && process)
            {
                process->GetTarget().GetPersistentExpressionStateForLanguage(language)->RemovePersistentVariable (expr_result);
            }

            if (execution_results != lldb::eExpressionCompleted)
            {
                if (log)
                    log->Printf("== [UserExpression::Evaluate] Execution completed abnormally ==");

                if (error_stream.GetString().empty())
                    error.SetExpressionError (execution_results, "expression failed to execute, unknown error");
                else
                    error.SetExpressionError (execution_results, error_stream.GetString().c_str());
            }
            else
            {
                if (expr_result)
                {
                    result_valobj_sp = expr_result->GetValueObject();

                    if (log)
                        log->Printf("== [UserExpression::Evaluate] Execution completed normally with result %s ==",
                                    result_valobj_sp->GetValueAsCString());
                }
                else
                {
                    if (log)
                        log->Printf("== [UserExpression::Evaluate] Execution completed normally with no result ==");

                    error.SetError(UserExpression::kNoResult, lldb::eErrorTypeGeneric);
                }
            }
        }
    }

    if (options.InvokeCancelCallback(lldb::eExpressionEvaluationComplete))
    {
        error.SetExpressionError (lldb::eExpressionInterrupted, "expression interrupted by callback after complete");
        return lldb::eExpressionInterrupted;
    }

    if (result_valobj_sp.get() == NULL)
    {
        result_valobj_sp = ValueObjectConstResult::Create (exe_ctx.GetBestExecutionContextScope(), error);
    }

    return execution_results;
}