在Windows内核设备驱动程序中使用fprintf

Question

I need to make a dump of certain structure in a file in Windows driver. So for the file pointer, I used void pointer and use it in the place of file pointer in fprintf.

The source also build successfully without any compilation error. But when I load the driver, the value stored on that pointer is not printing.

How I should make use of fprintf in Windows driver.

Answer 1

You should be using DbgPrintEx inside your device driver.

printf won't be working for you in kernel mode.

DbgPrintEx prints to the kernel's DbgPrint buffer, which can be watched with a kernel debugger like WinDbg or Kd, or, if you want to watch it on the local system, DebugView .

Most of the messages you print to this buffer are filtered out by default, so you want to adjust the filtering, as described in MSDN