gdb: remove unused fetch_inferior_event and inferior_event_handler parameters

I noticed that fetch_inferior_event receives the client_data parameter
from its caller, inferior_event_handler, but doesn't actually need it.
This patch removes it.  In turn, inferior_event_handler doesn't use its
parameter, so remove it too.

The `data` argument used when registering
remote_async_inferior_event_handler is changed to NULL, to avoid
confusion.  It could make people think that the value passed is used
somewhere, when in fact it's not.

gdb/ChangeLog:

	* inf-loop.c (inferior_event_handler): Remove client_data param.
	* inf-loop.h (inferior_event_handler): Likewise.
	* infcmd.c (step_1): Adjust.
	* infrun.c (proceed): Adjust.
	(fetch_inferior_event): Remove client_data param.
	(infrun_async_inferior_event_handler): Adjust.
	* infrun.h (fetch_inferior_event): Remove `void *` param.
	* linux-nat.c (handle_target_event): Adjust.
	* record-btrace.c (record_btrace_handle_async_inferior_event):
	Adjust.
	* record-full.c (record_full_async_inferior_event_handler):
	Adjust.
	* remote.c (remote_async_inferior_event_handler): Adjust.

Change-Id: I3c2aa1eb0ea3e0985df096660d2dcd794674f2ea

10 files changed, 31 insertions, 18 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 662e6b9..3d67327 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,19 @@
+2020-07-02  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* inf-loop.c (inferior_event_handler): Remove client_data param.
+	* inf-loop.h (inferior_event_handler): Likewise.
+	* infcmd.c (step_1): Adjust.
+	* infrun.c (proceed): Adjust.
+	(fetch_inferior_event): Remove client_data param.
+	(infrun_async_inferior_event_handler): Adjust.
+	* infrun.h (fetch_inferior_event): Remove `void *` param.
+	* linux-nat.c (handle_target_event): Adjust.
+	* record-btrace.c (record_btrace_handle_async_inferior_event):
+	Adjust.
+	* record-full.c (record_full_async_inferior_event_handler):
+	Adjust.
+	* remote.c (remote_async_inferior_event_handler): Adjust.
+
 2020-07-01  Tom Tromey  <tom@tromey.com>
 
 	* tui/tui-data.h (struct tui_win_info) <name>: Now pure virtual.
diff --git a/gdb/inf-loop.c b/gdb/inf-loop.c
index c40ae23..cf746b8 100644
--- a/gdb/inf-loop.c
+++ b/gdb/inf-loop.c
@@ -34,13 +34,12 @@
 /* General function to handle events in the inferior.  */
 
 void
-inferior_event_handler (enum inferior_event_type event_type, 
-			gdb_client_data client_data)
+inferior_event_handler (enum inferior_event_type event_type)
 {
   switch (event_type)
     {
     case INF_REG_EVENT:
-      fetch_inferior_event (client_data);
+      fetch_inferior_event ();
       break;
 
     case INF_EXEC_COMPLETE:
diff --git a/gdb/inf-loop.h b/gdb/inf-loop.h
index 4ddbcbc..ed27f52 100644
--- a/gdb/inf-loop.h
+++ b/gdb/inf-loop.h
@@ -22,7 +22,6 @@
 
 #include "target.h"             /* For enum inferior_event_type.  */
 
-extern void inferior_event_handler (enum inferior_event_type event_type, 
-				    void* client_data);
+extern void inferior_event_handler (enum inferior_event_type event_type);
 
 #endif /* #ifndef INF_LOOP_H */
diff --git a/gdb/infcmd.c b/gdb/infcmd.c
index 64eea88..cfc3169 100644
--- a/gdb/infcmd.c
+++ b/gdb/infcmd.c
@@ -907,7 +907,7 @@ step_1 (int skip_subroutines, int single_inst, const char *count_string)
       thr->thread_fsm->clean_up (thr);
       proceeded = normal_stop ();
       if (!proceeded)
-	inferior_event_handler (INF_EXEC_COMPLETE, NULL);
+	inferior_event_handler (INF_EXEC_COMPLETE);
       all_uis_check_sync_execution_done ();
     }
 }
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 7bc405f..6b655d4 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -2968,7 +2968,7 @@ proceed (CORE_ADDR addr, enum gdb_signal siggnal)
       /* The target for some reason decided not to resume.  */
       normal_stop ();
       if (target_can_async_p ())
-	inferior_event_handler (INF_EXEC_COMPLETE, NULL);
+	inferior_event_handler (INF_EXEC_COMPLETE);
       return;
     }
 
@@ -3933,7 +3933,7 @@ all_uis_on_sync_execution_starting (void)
    necessary cleanups.  */
 
 void
-fetch_inferior_event (void *client_data)
+fetch_inferior_event ()
 {
   struct execution_control_state ecss;
   struct execution_control_state *ecs = &ecss;
@@ -4050,7 +4050,7 @@ fetch_inferior_event (void *client_data)
 
 	    if (!proceeded)
 	      {
-		inferior_event_handler (INF_EXEC_COMPLETE, NULL);
+		inferior_event_handler (INF_EXEC_COMPLETE);
 		cmd_done = 1;
 	      }
 
@@ -9422,7 +9422,7 @@ static const struct internalvar_funcs siginfo_funcs =
 static void
 infrun_async_inferior_event_handler (gdb_client_data data)
 {
-  inferior_event_handler (INF_REG_EVENT, NULL);
+  inferior_event_handler (INF_REG_EVENT);
 }
 
 void _initialize_infrun ();
diff --git a/gdb/infrun.h b/gdb/infrun.h
index 9808541..49b28f0 100644
--- a/gdb/infrun.h
+++ b/gdb/infrun.h
@@ -130,7 +130,7 @@ extern void stop_all_threads (void);
 
 extern void prepare_for_detach (void);
 
-extern void fetch_inferior_event (void *);
+extern void fetch_inferior_event ();
 
 extern void init_wait_for_inferior (void);
 
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 0a2bfdc..fde360f 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -4232,7 +4232,7 @@ sigchld_handler (int signo)
 static void
 handle_target_event (int error, gdb_client_data client_data)
 {
-  inferior_event_handler (INF_REG_EVENT, NULL);
+  inferior_event_handler (INF_REG_EVENT);
 }
 
 /* Create/destroy the target events pipe.  Returns previous state.  */
diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index 226d56d..718de62 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -325,7 +325,7 @@ record_btrace_auto_disable (void)
 static void
 record_btrace_handle_async_inferior_event (gdb_client_data data)
 {
-  inferior_event_handler (INF_REG_EVENT, NULL);
+  inferior_event_handler (INF_REG_EVENT);
 }
 
 /* See record-btrace.h.  */
diff --git a/gdb/record-full.c b/gdb/record-full.c
index 9d6e403..1d8f193 100644
--- a/gdb/record-full.c
+++ b/gdb/record-full.c
@@ -905,7 +905,7 @@ static struct async_event_handler *record_full_async_inferior_event_token;
 static void
 record_full_async_inferior_event_handler (gdb_client_data data)
 {
-  inferior_event_handler (INF_REG_EVENT, NULL);
+  inferior_event_handler (INF_REG_EVENT);
 }
 
 /* Open the process record target for 'core' files.  */
diff --git a/gdb/remote.c b/gdb/remote.c
index d560c69..f7f99dc 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -5605,8 +5605,7 @@ remote_target::open_1 (const char *name, int from_tty, int extended_p)
 
   /* Register extra event sources in the event loop.  */
   rs->remote_async_inferior_event_token
-    = create_async_event_handler (remote_async_inferior_event_handler,
-				  remote);
+    = create_async_event_handler (remote_async_inferior_event_handler, NULL);
   rs->notif_state = remote_notif_state_allocate (remote);
 
   /* Reset the target state; these things will be queried either by
@@ -14158,13 +14157,13 @@ remote_async_serial_handler (struct serial *scb, void *context)
 {
   /* Don't propogate error information up to the client.  Instead let
      the client find out about the error by querying the target.  */
-  inferior_event_handler (INF_REG_EVENT, NULL);
+  inferior_event_handler (INF_REG_EVENT);
 }
 
 static void
 remote_async_inferior_event_handler (gdb_client_data data)
 {
-  inferior_event_handler (INF_REG_EVENT, data);
+  inferior_event_handler (INF_REG_EVENT);
 }
 
 int