问题描述
我正在寻找在 Windows XP 下通过进程 ID 以编程方式暂停和恢复特定进程的不同方法.
I am looking for different ways to pause and resume programmatically a particular process via its process ID under Windows XP.
进程挂起/恢复工具使用 SuspendThread/ResumeThread 但警告多线程程序和死锁问题.
Process suspend/resume tool does it with SuspendThread / ResumeThread but warns about multi-threaded programs and deadlock problems.
PsSuspend 看起来不错，但我想知道它是否有什么特别之处关于死锁或使用其他方法?
PsSuspend looks okay, but I wonder if it does anything special about deadlocks or uses another method?
首选语言:C++/Python
Prefered languages : C++ / Python
推荐答案
如果您调试调试器"(例如，使用 logger.exe 跟踪由 windbg 进行的所有 API 调用.exe)，看来调试器使用 SuspendThread()/ResumeThread() 来暂停正在调试的进程中的所有线程.
If you "debug the debugger" (for instance, using logger.exe to trace all API calls made by windbg.exe), it appears that the debugger uses SuspendThread()/ResumeThread() to suspend all of the threads in the process being debugged.
PsSuspend 可能使用不同的方式挂起进程(我不确定)，但仍然可以挂起其他进程:如果您挂起的进程持有另一个进程需要的共享同步对象，您可以阻止其他进程取得任何进展.如果两个程序都写得很好，当你恢复你挂起的那个程序时，它们应该会恢复，但并不是所有的程序都写得很好.如果这导致正在执行挂起的程序挂起，那么您就会陷入死锁.
PsSuspend may use a different way of suspending processes (I'm not sure), but it is still possible to hang other processes: if the process you're suspending is holding a shared synchronization object that is needed by another process, you may block that other process from making any progress. If both programs are well-written, they should recover when you resume the one that you suspended, but not all programs are well-written. And if this causes your program that is doing the suspending to hang, then you have a deadlock.
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