Debug Command 10 - Stop Command

Parameters

Pid

= Process ID of debuggee
Cmd
= DBG_C_Stop

Returns

The function performed by this command depends on the current state of the debuggee process, as follows:

• If the debuggee is already stopped:

  If there is a pending notification from the current thread, it is returned. See DosDebug Notifications for information about pending notifications.

  If there is no pending notification from the current thread, DBG_N_Success is returned.

• If the debuggee is executing user code:

  The debuggee is marked to stop before the next time it is ready to execute user-space (ring 2 or 3) code. This is known as an asynchronous stop.

  Kernel operations will not be interrupted for this DBG_C_Stop That is, threads blocked in the kernel (via a semaphore or internal operation) will not be interrupted. However, an infinite loop in user space will be stopped.

  Note: The asynchronous variation of the stop command implies a debugger with a minimum of two threads; one waits for a DBG_C_Go or DBG_C_SStep command to finish, and another executes the DBG_C_Stop command.

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