[PATCH 2/5] gdb: Free inferior->priv when inferior exits

[Pedro Alves <palves@redhat.com>]

(Where "exits" includes being killed or detached.)

Nothing is clearing inferior->priv currently.  This is a problem if we
change the inferior's process_stratum targets in a single debug
session.  This field is currently only used by darwin-nat.c, but a
follow up patch will make remote.c use it too.  Without the fix,
remote.c might end up mistaking the priv object allocated by
darwin-nat.c with its own.

(Found by inspection.)

gdb/ChangeLog:
2016-02-16  Pedro Alves  <palves@redhat.com>

	* inferior.c (exit_inferior_1): Free 'priv'.
---
 gdb/inferior.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gdb/inferior.c b/gdb/inferior.c
index 45b3141..083dc63 100644
--- a/gdb/inferior.c
+++ b/gdb/inferior.c
@@ -255,6 +255,9 @@ exit_inferior_1 (struct inferior *inftoex, int silent)
 
   inf->pid = 0;
   inf->fake_pid_p = 0;
+  xfree (inf->priv);
+  inf->priv = NULL;
+
   if (inf->vfork_parent != NULL)
     {
       inf->vfork_parent->vfork_child = NULL;
-- 
1.9.3