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Thread Internals

Thread Internals. 組員：王傳陞、林威丞 黃品舜、李盈賢. outline. what is a thread? Data Structures executive thread block kernel thread block thread environment block Thread-Related Kernel Variables Thread-Related Performance Counters Windows Thread Functions Birth of a Thread. What is a Thread?.

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Thread Internals

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  1. Thread Internals 組員：王傳陞、林威丞 黃品舜、李盈賢

  2. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  3. What is a Thread? • A thread is the basic object that executes instructions on a processor. All running processes have at least one thread.

  4. What is a Thread?(cont.) • Traditional UNIX Process • Heavyweight process • Single thread • Mach Task • Thread • Lightweight process • Thread id, PC, register set, a stack • Dynamic Object • Mult-thread

  5. What is a Thread?(cont.) Single-threaded process Multi-threaded process Resources Resources Threads Threads

  6. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  7. Data Structures EP : executive process KP : kernel process (PCB) PEB : process environment block ET : executive thread KT : kernel thread TEB : thread environment block

  8. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  9. executive thread block Thread time : Thread create and exit time information. Process identification : Process ID and pointer to EPROCESS block of the process that the thread belongs to. Start address : Address of thread start routine.

  10. executive thread block(cont.) Impersonation information : Access token and impersonation level (if the thread is impersonating a client). LPC information : Message ID that the thread is waiting for and address of message. I/O information : List of pending I/O request packets (IRPs).

  11. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  12. kernel thread block Dispatcher header : A data structure that contains the object type, the signaled state, and a list of the threads waiting on that object. Execution time : Total user and kernel CPU time. Pointer to kernel stack information : Base and upper address of the kernel stack.

  13. kernel thread block(cont.) Pointer to system service table : Each thread starts out with this field service table pointing to the main system service table (KeServiceDescriptorTable). When a thread first calls a Windows GUI service, its system service table is changed to one that includes the GDI and USER services in Win32k.sys.

  14. kernel thread block(cont.) Scheduling information : Base and current priority, quantum, affinity mask, ideal processor, scheduling state, freeze count, and suspend count. Trap frame : Trap frame allow system to resume where if left off. APC queues : List of pending user-mode and kernelmode APCs, and alertable flag.

  15. kernel thread block(cont.) Wait blocks : Each thread that is in a wait state has a list of the wait blocks that represent the objects the thread is waiting for. Timer block : Built-in timer block (also a corresponding wait block). Pointer to TEB : Thread ID, TLS information, PEB pointer, and GDI and OpenGL information.

  16. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  17. thread environment block TIB : One element in the TIB structure is a pointer to an EXCEPTION_RECORD structure, which in turn contains a pointer to an exception handling callback function. Thus, each thread has its own exception callback function. Fiber : lightweight” threads Others : Graphics Device Interface 、 Open Graphics Library、Transport Layer Security…

  18. outline • What is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  19. Thread-Related Kernel Variables Example : 線程監控

  20. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  21. Thread-Related Performance Counters

  22. Thread-Related Performance Counters(cont.) Thread Object詳細資料連結

  23. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

  24. Windows Thread Functions

  25. Windows Thread Functions(cont.)

  26. outline • what is a thread? • Data Structures • executive thread block • kernel thread block • thread environment block • Thread-Related Kernel Variables • Thread-Related Performance Counters • Windows Thread Functions • Birth of a Thread

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