本論文設計並實作出一適用於作業系統之動態面向織入工具，使作業系統執行期間可進行Aspect之織入與抽離。傳統上，若是要對程式本體增加或改變其功能，往往都需要於程式本體中修改或加入所需程式碼並重新編譯；對於作業系統層級而言，所花費的代價將大幅增加。因此若能於系統執行期間動態改變原有系統核心之功能，對系統軟體開發與維護之效益上將有顯著地提昇。面向導向程式設計與動態面向織入技術對此提供了一個良好之理論基礎。
本論文所設計之動態面向織入工具其架構是基於動態面向織入技術，允許於選擇之程式碼位置(稱為join point)中織入一段程式碼(稱為advice)，可以在系統執行時期動態調整存在於系統之程式行為。此一工具之實作包含織入機制與Aspect管理模組。織入機制採用程式碼接合(code splicing)方式，於欲織入之目標位置植入一道跳轉指令以改變程式執行流程。Aspect管理模組提供對Aspect管理所需之操作功能。本論文所設計之架構並支援於同一個join point中織入多個advice，讓使用者可以更有彈性且精細地調整核心功能。
為了讓使用者方便操作，本論文實作之動態面向織入工具也包含一個圖形化使用者介面(GUI)，讓使用者可以藉由GUI介面之導引填入join point、advice等必要資訊，並自動合成系統可用之Aspect；使用者也可以透過GUI介面程式管理目前存在於系統之所有Aspect。本論文之實作於Linux作業系統以較低之系統需求與額外所需花費之代價不高的情況下運作，結果顯示出其可行性與有效性。

This thesis presents the design and the implementation of a dynamic aspect weaving tool for operating systems, which is based on aspect-oriented programming (AOP) techniques and enables weaving and unweaving aspects into operating system dynamically during runtime. Traditionally, if we want to add or change the functionality of programs, it is always necessary to modify or insert code into the base programs and re-compile to build executable code images. The cost is usually high especially for operating systems. With dynamic changing system operations at runtime, the cost of system development and maintenance would reduce significantly. AOP and dynamic weaving technology have provided basis for this theory.
The architecture of the dynamic aspect weaving tool in this thesis is designed based on the notion of dynamic aspect weaving which, by injecting a piece of code (called advice) at selected location of code (called join point), can achieve modulating at runtime the behavior of existing program. The implementation includes the weaving mechanism and an aspect manager. The weaving mechanism is developed adopting code splicing technique to change the execution of program. The aspect manager provides managing operations on aspects and supports weaving multiple advices at the same join point, allowing more flexible and fine-grained adjustment of kernel functions.
In order to allow users to easily facilitate the operations of creating advices and managing aspects, a graphical user interface (GUI) is implemented for the aspect manager, which can guide user in providing required information like join point, advice, etc. The GUI can initiate synthesizing aspect automatically at user request, and can help manage all aspects woven into the system. The implementation runs on Linux operating system with low system requirement and the runtime overhead incurred is very low. This demonstrated its feasibility and effectiveness.

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