Share handle_load_dll and handle_unload_dll declarations

This changes nat/windows-nat.h to declare handle_load_dll and
handle_unload_dll.  The embedding application is required to implement
these -- while the actual code was difficult to share due to some
other differences between the two programs, sharing the declaration
lets a subsequent patch share more code that uses these as callbacks.

gdb/ChangeLog
2020-04-08  Tom Tromey  <tromey@adacore.com>

	* windows-nat.c (windows_nat::handle_load_dll)
	(windows_nat::handle_unload_dll): Rename.  No longer static.
	* nat/windows-nat.h (handle_load_dll, handle_unload_dll):
	Declare.

gdbserver/ChangeLog
2020-04-08  Tom Tromey  <tromey@adacore.com>

	* win32-low.c (windows_nat::handle_load_dll): Rename from
	handle_load_dll.  No longer static.
	(windows_nat::handle_unload_dll): Rename from handle_unload_dll.
	No longer static.

1 files changed, 19 insertions, 0 deletions

diff --git a/gdb/nat/windows-nat.h b/gdb/nat/windows-nat.h
index f438bef..2b2fd11 100644
--- a/gdb/nat/windows-nat.h
+++ b/gdb/nat/windows-nat.h
@@ -125,6 +125,25 @@ extern windows_thread_info *thread_rec (ptid_t ptid,
    This function must be supplied by the embedding application.  */
 extern int handle_output_debug_string (struct target_waitstatus *ourstatus);
 
+/* Handle a DLL load event.
+
+   This function assumes that the current event did not occur during
+   inferior initialization.
+
+   This function must be supplied by the embedding application.  */
+
+extern void handle_load_dll ();
+
+/* Handle a DLL unload event.
+
+   This function assumes that this event did not occur during inferior
+   initialization.
+
+   This function must be supplied by the embedding application.  */
+
+extern void handle_unload_dll ();
+
+
 /* Currently executing process */
 extern HANDLE current_process_handle;
 extern DWORD current_process_id;