ntdll: Implement DbgUiConnectToDbg().

dlls/ntdll/ntdll.spec

@@ -34,7 +34,7 @@
 @ stub DbgPrompt
 # @ stub DbgQueryDebugFilterState
 # @ stub DbgSetDebugFilterState
-@ stub DbgUiConnectToDbg
+@ stdcall DbgUiConnectToDbg()
 @ stub DbgUiContinue
 @ stub DbgUiConvertStateChangeStructure
 # @ stub DbgUiDebugActiveProcess

dlls/ntdll/process.c

@@ -135,6 +135,22 @@ void WINAPI DbgUiSetThreadDebugObject( HANDLE handle )
 }
 
 /***********************************************************************
+ *      DbgUiConnectToDbg (NTDLL.@)
+ */
+NTSTATUS WINAPI DbgUiConnectToDbg(void)
+{
+    HANDLE handle;
+    NTSTATUS status;
+    OBJECT_ATTRIBUTES attr = { sizeof(attr) };
+
+    if (DbgUiGetThreadDebugObject()) return STATUS_SUCCESS;  /* already connected */
+
+    status = NtCreateDebugObject( &handle, DEBUG_ALL_ACCESS, &attr, 0 );
+    if (!status) DbgUiSetThreadDebugObject( handle );
+    return status;
+}
+
+/***********************************************************************
  *      DbgUiRemoteBreakin (NTDLL.@)
  */
 void WINAPI DbgUiRemoteBreakin( void *arg )

include/winternl.h

@@ -3020,6 +3020,7 @@ typedef struct _PS_CREATE_INFO
 NTSYSAPI void      WINAPI DbgBreakPoint(void);
 NTSYSAPI NTSTATUS WINAPIV DbgPrint(LPCSTR fmt, ...);
 NTSYSAPI NTSTATUS WINAPIV DbgPrintEx(ULONG iComponentId, ULONG Level, LPCSTR fmt, ...);
+NTSYSAPI NTSTATUS  WINAPI DbgUiConnectToDbg(void);
 NTSYSAPI HANDLE    WINAPI DbgUiGetThreadDebugObject(void);
 NTSYSAPI NTSTATUS  WINAPI DbgUiIssueRemoteBreakin(HANDLE);
 NTSYSAPI void      WINAPI DbgUiRemoteBreakin(void*);