gdb: rename things related to step over chains

Rename step_over_queue_head to global_thread_step_over_chain_head, to
make it more obvious when reading code that we are touching the global
queue.  Rename all functions that operate on it to have "global" in
their name, to make it clear on which chain they operate on.  Also, in a
subsequent patch, we'll need both global and non-global versions of
these functions, so it will be easier to do the distinction if they are
named properly.

Normalize the naming to use "chain" everywhere instead of sometimes
"queue", sometimes "chain".

I also reworded a few comments in gdbthread.h.  They implied that the
step over chain is per-inferior, when in reality there is only one
global chain, not one per inferior, as far as I understand.

gdb/ChangeLog:

	* gdbthread.h (thread_step_over_chain_enqueue): Rename to...
	(global_thread_step_over_chain_enqueue): ... this.  Update all
	users.
	(thread_step_over_chain_remove): Rename to...
	(global_thread_step_over_chain_remove): ... this.  Update all
	users.
	(thread_step_over_chain_next): Rename to...
	(global_thread_step_over_chain_next): ... this.  Update all
	users.
	* infrun.h (step_over_queue_head): Rename to...
	(global_thread_step_over_chain_head): ... this.  Update all
	users.
	* infrun.c (step_over_queue_head): Rename to...
	(global_thread_step_over_chain_head): ... this.  Update all
	users.
	* thread.c (step_over_chain_remove): Rename to...
	(thread_step_over_chain_remove): ... this.  Update all users.
	(thread_step_over_chain_next): Rename to...
	(global_thread_step_over_chain_next): ... this.  Update all
	users.
	(thread_step_over_chain_enqueue): Rename to...
	(global_thread_step_over_chain_enqueue): ... this.  Update all
	users.
	(thread_step_over_chain_remove): Rename to...
	(global_thread_step_over_chain_remove): ... this.  Update all
	users.

Change-Id: Iabbf57d83c01321ca199d83fadb57f5b04e4d6d9

1 files changed, 8 insertions, 8 deletions

diff --git a/gdb/gdbthread.h b/gdb/gdbthread.h
index 630727e..1eecb98 100644
--- a/gdb/gdbthread.h
+++ b/gdb/gdbthread.h
@@ -741,20 +741,20 @@ extern value *get_last_thread_stack_temporary (struct thread_info *tp);
 extern bool value_in_thread_stack_temporaries (struct value *,
 					       struct thread_info *thr);
 
-/* Add TP to the end of its inferior's pending step-over chain.  */
+/* Add TP to the end of the global pending step-over chain.  */
 
-extern void thread_step_over_chain_enqueue (struct thread_info *tp);
+extern void global_thread_step_over_chain_enqueue (thread_info *tp);
 
-/* Remove TP from its inferior's pending step-over chain.  */
+/* Remove TP from the global pending step-over chain.  */
 
-extern void thread_step_over_chain_remove (struct thread_info *tp);
+extern void global_thread_step_over_chain_remove (thread_info *tp);
 
-/* Return the next thread in the step-over chain starting at TP.  NULL
-   if TP is the last entry in the chain.  */
+/* Return the thread following TP in the global step-over chain, or NULL if TP
+   is the last entry in the chain.  */
 
-extern struct thread_info *thread_step_over_chain_next (struct thread_info *tp);
+extern thread_info *global_thread_step_over_chain_next (thread_info *tp);
 
-/* Return true if TP is in the step-over chain.  */
+/* Return true if TP is in any step-over chain.  */
 
 extern int thread_is_in_step_over_chain (struct thread_info *tp);