Remove find_inferior_id

Remove find_inferior_id, replacing its usages with find_thread_ptid.
find_thread_ptid was implemented using find_inferior_id, so move the
implementation there instead.

gdb/gdbserver/ChangeLog:

	* inferiors.c (find_inferior_id): Remove.
	(find_thread_ptid): Move implemention from find_inferior_id to
	here.
	* inferiors.h (find_inferior_id): Remove.
	* server.c (handle_status): Use find_thread_ptid.
	(process_serial_event): Likewise.
	* thread-db.c (find_one_thread): Likewise.
	(thread_db_thread_handle): Likewise.
	* win32-low.c (thread_rec): Likewise.
	(child_delete_thread): Likewise.
	(win32_thread_alive): Likewise.
	(get_child_debug_event): Likewise.

gdb/gdbserver/ChangeLog

@@ -1,3 +1,18 @@
+2017-12-02  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* inferiors.c (find_inferior_id): Remove.
+	(find_thread_ptid): Move implemention from find_inferior_id to
+	here.
+	* inferiors.h (find_inferior_id): Remove.
+	* server.c (handle_status): Use find_thread_ptid.
+	(process_serial_event): Likewise.
+	* thread-db.c (find_one_thread): Likewise.
+	(thread_db_thread_handle): Likewise.
+	* win32-low.c (thread_rec): Likewise.
+	(child_delete_thread): Likewise.
+	(win32_thread_alive): Likewise.
+	(get_child_debug_event): Likewise.
+
 2017-12-02  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* linux-mips-low.c (update_watch_registers_callback): Return

gdb/gdbserver/inferiors.c

@@ -42,16 +42,6 @@ find_inferior (std::list<thread_info *> *thread_list,
   });
 }
 
-thread_info *
-find_inferior_id (std::list<thread_info *> *thread_list, ptid_t id)
-{
-  gdb_assert (thread_list == &all_threads);
-
-  return find_thread ([&] (thread_info *thread) {
-    return thread->id == id;
-  });
-}
-
 thread_info *
 find_inferior_in_random (std::list<thread_info *> *thread_list,
 			 int (*func) (thread_info *, void *),
@@ -120,7 +110,9 @@ get_first_thread (void)
 struct thread_info *
 find_thread_ptid (ptid_t ptid)
 {
-  return (struct thread_info *) find_inferior_id (&all_threads, ptid);
+  return find_thread ([&] (thread_info *thread) {
+    return thread->id == ptid;
+  });
 }
 
 /* Find a thread associated with the given PROCESS, or NULL if no

gdb/gdbserver/inferiors.h

@@ -142,8 +142,6 @@ void clear_inferiors (void);
 
 thread_info *find_inferior (std::list<thread_info *> *thread_list,
 			    int (*func) (thread_info *, void *), void *arg);
-thread_info *find_inferior_id (std::list<thread_info *> *thread_list,
-			       ptid_t id);
 thread_info *find_inferior_in_random (std::list<thread_info *> *thread_list,
 				      int (*func) (thread_info *, void *),
 				      void *arg);

gdb/gdbserver/server.c

@@ -3355,7 +3355,7 @@ handle_status (char *own_buf)
       if (last_status.kind != TARGET_WAITKIND_IGNORE
 	  && last_status.kind != TARGET_WAITKIND_EXITED
 	  && last_status.kind != TARGET_WAITKIND_SIGNALLED)
-	thread = find_inferior_id (&all_threads, last_ptid);
+	thread = find_thread_ptid (last_ptid);
 
       /* If the last event thread is not found for some reason, look
 	 for some other thread that might have an event to report.  */
@@ -4081,9 +4081,7 @@ process_serial_event (void)
 		  /* GDB is telling us to choose any thread.  Check if
 		     the currently selected thread is still valid. If
 		     it is not, select the first available.  */
-		  struct thread_info *thread =
+		  thread_info *thread = find_thread_ptid (general_thread);
-		    (struct thread_info *) find_inferior_id (&all_threads,
-							     general_thread);
 		  if (thread == NULL)
 		    thread = get_first_thread ();
 		  thread_id = thread->id;

gdb/gdbserver/thread-db.c

@@ -165,13 +165,12 @@ find_one_thread (ptid_t ptid)
   td_thrhandle_t th;
   td_thrinfo_t ti;
   td_err_e err;
-  struct thread_info *inferior;
   struct lwp_info *lwp;
   struct thread_db *thread_db = current_process ()->priv->thread_db;
   int lwpid = ptid_get_lwp (ptid);
 
-  inferior = (struct thread_info *) find_inferior_id (&all_threads, ptid);
+  thread_info *thread = find_thread_ptid (ptid);
-  lwp = get_thread_lwp (inferior);
+  lwp = get_thread_lwp (thread);
   if (lwp->thread_known)
     return 1;
 
@@ -452,8 +451,7 @@ thread_db_thread_handle (ptid_t ptid, gdb_byte **handle, int *handle_len)
 {
   struct thread_db *thread_db;
   struct lwp_info *lwp;
-  struct thread_info *thread
+  thread_info *thread = find_thread_ptid (ptid);
-    = (struct thread_info *) find_inferior_id (&all_threads, ptid);
 
   if (thread == NULL)
     return false;

gdb/gdbserver/win32-low.c

@@ -193,14 +193,11 @@ win32_require_context (win32_thread_info *th)
 static win32_thread_info *
 thread_rec (ptid_t ptid, int get_context)
 {
-  struct thread_info *thread;
+  thread_info *thread = find_thread_ptid (ptid);
-  win32_thread_info *th;
-
-  thread = (struct thread_info *) find_inferior_id (&all_threads, ptid);
   if (thread == NULL)
     return NULL;
 
-  th = (win32_thread_info *) thread_target_data (thread);
+  win32_thread_info *th = (win32_thread_info *) thread_target_data (thread);
   if (get_context)
     win32_require_context (th);
   return th;
@@ -244,14 +241,11 @@ delete_thread_info (thread_info *thread)
 static void
 child_delete_thread (DWORD pid, DWORD tid)
 {
-  ptid_t ptid;
-
   /* If the last thread is exiting, just return.  */
   if (all_threads.size () == 1)
     return;
 
-  ptid = ptid_build (pid, tid, 0);
+  thread_info *thread = find_thread_ptid (ptid_t (pid, tid));
-  thread_info *thread = find_inferior_id (&all_threads, ptid);
   if (thread == NULL)
     return;
 
@@ -892,15 +886,9 @@ win32_join (int pid)
 static int
 win32_thread_alive (ptid_t ptid)
 {
-  int res;
-
   /* Our thread list is reliable; don't bother to poll target
      threads.  */
-  if (find_inferior_id (&all_threads, ptid) != NULL)
+  return find_thread_ptid (ptid) != NULL;
-    res = 1;
-  else
-    res = 0;
-  return res;
 }
 
 /* Resume the inferior process.  RESUME_INFO describes how we want
@@ -1582,8 +1570,7 @@ get_child_debug_event (struct target_waitstatus *ourstatus)
     }
 
   ptid = debug_event_ptid (&current_event);
-  current_thread =
+  current_thread = find_thread_ptid (ptid);
-    (struct thread_info *) find_inferior_id (&all_threads, ptid);
   return 1;
 }