如何在WinCE中捕捉未處理的異常？

Question

在桌面Windows中，我可以使用windows.h中的SetUnhandledExceptionFilter函數，但它在WinCE中不起作用。我如何在WinCE中捕獲未處理的異常？

注意：我使用C++而不是.NET。

Answer 1

我到目前爲止發現的唯一辦法是包裝每一個線程的執行與應用：

__try 
{ 
    // Call the thread start function here 
} 
__except(MyExceptionFilter(GetExceptionInformation()) 
{ 
    // Handle the exception here 
} 

這聽起來像一個大量的工作，但如果你寫一個由相對容易函數封裝了線程你是這樣的：

typedef struct { 
    void* startFct; 
    void* args; 
} ThreadHookArgs; 

// "params" contains an heap-allocated instance of ThreadHookArgs 
// with the wrapped thread start function and its arguments. 
DWORD WINAPI wrapThread(LPVOID params) { 

    ThreadHookArgs threadParams; 
    memcpy(&args, params, sizeof(ThreadHookArgs)); 

    // Delete the parameters, now we have a copy of them 
    delete params; 

    __try { 
     // Execute the thread start function 
     return ((LPTHREAD_START_ROUTINE) threadParams.startFct) (threadParams.args); 
    } 
    __except(MyExceptionFilter(GetExceptionInformation()) 
    { 
     // Handle the exception here 
     return EXIT_FAILURE; 
    } 

} 

然後編寫調用掛鉤，而不是線程啓動功能自己線程創建函數：

// Drop-in replacement for CreateThread(), executes the given 
// start function in a SEH exception handler 
HANDLE MyCreateThread(LPSECURITY_ATTRIBUTES lpThreadAttributes, 
         DWORD dwStackSize, 
         LPTHREAD_START_ROUTINE lpStartAddress, 
         LPVOID lpParameter, 
         DWORD dwCreationFlags, 
         LPDWORD lpThreadId) 
{ 
    HANDLE hThread; 
    DWORD dwThreadId; 

    LPTHREAD_START_ROUTINE startFct = lpStartAddress; 
    LPVOID startParam = lpParameter; 

    // Allocate the hook function arguments on the heap. 
    // The function will delete them when it runs. 
    ThreadHookArgs* hookArgs = new ThreadHookArgs; 
    hookArgs->fct = lpStartAddress; 
    hookArgs->args = lpParameter; 

    // Set the start function of the created thread to 
    // our exception handler hook function 
    startFct = (LPTHREAD_START_ROUTINE) &wrapThread; 
    startParam = hookArgs; 

    // Start the hook function, which will in turn execute 
    // the desired thread start function 
    hThread = CreateThread(lpThreadAttributes, 
          dwStackSize, 
          startFct, 
          startParam, 
          dwCreationFlags, 
          &dwThreadId); 

    return hThread; 
} 

請注意，如果您使用的是Windows CE 6.0及更高版本，這些版本的向量異常處理，這可能使它更容易：

http://msdn.microsoft.com/en-us/library/ee488606%28v=winembedded.60%29.aspx