X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdb%2Finferior.c;h=45b31419f4635b9eaef22d3ae8ae745fafba145e;hb=5357150c97899af2cc93072780a9c3a128c5b1ae;hp=2e44f175bb1442a438c536b55d5018d6c4b220fb;hpb=e3ae3c4345fa14f2f3b0b2c5d4d23760af9f74f5;p=binutils-gdb.git

diff --git a/gdb/inferior.c b/gdb/inferior.c
index 2e44f175bb1..45b31419f46 100644
--- a/gdb/inferior.c
+++ b/gdb/inferior.c
@@ -1,6 +1,6 @@
 /* Multi-process control for GDB, the GNU debugger.
 
-   Copyright (C) 2008-2015 Free Software Foundation, Inc.
+   Copyright (C) 2008-2016 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -74,7 +74,7 @@ set_current_inferior (struct inferior *inf)
 static void
 restore_inferior (void *arg)
 {
-  struct inferior *saved_inferior = arg;
+  struct inferior *saved_inferior = (struct inferior *) arg;
 
   set_current_inferior (saved_inferior);
 }
@@ -128,15 +128,24 @@ add_inferior_silent (int pid)
 {
   struct inferior *inf;
 
-  inf = xmalloc (sizeof (*inf));
+  inf = XNEW (struct inferior);
   memset (inf, 0, sizeof (*inf));
   inf->pid = pid;
 
   inf->control.stop_soon = NO_STOP_QUIETLY;
 
   inf->num = ++highest_inferior_num;
-  inf->next = inferior_list;
-  inferior_list = inf;
+
+  if (inferior_list == NULL)
+    inferior_list = inf;
+  else
+    {
+      struct inferior *last;
+
+      for (last = inferior_list; last->next != NULL; last = last->next)
+	;
+      last->next = inf;
+    }
 
   inf->environment = make_environ ();
   init_environ (inf->environment);
@@ -171,7 +180,8 @@ struct delete_thread_of_inferior_arg
 static int
 delete_thread_of_inferior (struct thread_info *tp, void *data)
 {
-  struct delete_thread_of_inferior_arg *arg = data;
+  struct delete_thread_of_inferior_arg *arg
+    = (struct delete_thread_of_inferior_arg *) data;
 
   if (ptid_get_pid (tp->ptid) == arg->pid)
     {
@@ -449,22 +459,41 @@ have_inferiors (void)
   return 0;
 }
 
+/* Return the number of live inferiors.  We account for the case
+   where an inferior might have a non-zero pid but no threads, as
+   in the middle of a 'mourn' operation.  */
+
 int
-have_live_inferiors (void)
+number_of_live_inferiors (void)
 {
   struct inferior *inf;
+  int num_inf = 0;
 
   for (inf = inferior_list; inf; inf = inf->next)
     if (inf->pid != 0)
       {
 	struct thread_info *tp;
-	
-	tp = any_thread_of_process (inf->pid);
-	if (tp && target_has_execution_1 (tp->ptid))
-	  break;
+
+	ALL_NON_EXITED_THREADS (tp)
+	 if (tp && ptid_get_pid (tp->ptid) == inf->pid)
+	   if (target_has_execution_1 (tp->ptid))
+	     {
+	       /* Found a live thread in this inferior, go to the next
+		  inferior.  */
+	       ++num_inf;
+	       break;
+	     }
       }
 
-  return inf != NULL;
+  return num_inf;
+}
+
+/* Return true if there is at least one live inferior.  */
+
+int
+have_live_inferiors (void)
+{
+  return number_of_live_inferiors () > 0;
 }
 
 /* Prune away any unused inferiors, and then prune away no longer used
@@ -719,8 +748,8 @@ inferior_command (char *args, int from_tty)
 	  switch_to_thread (tp->ptid);
 	}
 
-      printf_filtered (_("[Switching to thread %d (%s)] "),
-		       pid_to_thread_id (inferior_ptid),
+      printf_filtered (_("[Switching to thread %s (%s)] "),
+		       print_thread_id (inferior_thread ()),
 		       target_pid_to_str (inferior_ptid));
     }
   else
@@ -979,6 +1008,26 @@ show_print_inferior_events (struct ui_file *file, int from_tty,
   fprintf_filtered (file, _("Printing of inferior events is %s.\n"), value);
 }
 
+/* Return a new value for the selected inferior's id.  */
+
+static struct value *
+inferior_id_make_value (struct gdbarch *gdbarch, struct internalvar *var,
+			void *ignore)
+{
+  struct inferior *inf = current_inferior ();
+
+  return value_from_longest (builtin_type (gdbarch)->builtin_int, inf->num);
+}
+
+/* Implementation of `$_inferior' variable.  */
+
+static const struct internalvar_funcs inferior_funcs =
+{
+  inferior_id_make_value,
+  NULL,
+  NULL
+};
+
 
 
 void
@@ -1042,4 +1091,5 @@ Show printing of inferior events (e.g., inferior start and exit)."), NULL,
          show_print_inferior_events,
          &setprintlist, &showprintlist);
 
+  create_internalvar_type_lazy ("_inferior", &inferior_funcs, NULL);
 }