remove target_acknowledge_created_inferior

This target_ops routine appears to be unused in practice, so this patch
removes it.

gdb/ChangeLog:

        * inf-child.c (inf_child_acknowledge_created_inferior): Delete.
        (inf_child_target): Do not set t->to_acknowledge_created_inferior.
        * inf-ptrace.c (inf_ptrace_create_inferior): Remove call to
        target_acknowledge_created_inferior.
        * inf-ttrace.c (inf_ttrace_him): Likewise.
        * target.h (struct target_ops): Delete to_acknowledge_created_inferior
        field.
        (target_acknowledge_created_inferior): Delete.
        * target.c (update_current_target): Remove setting of
        to_acknowledge_created_inferior field. Do default value for that
        field either.
        (debug_to_acknowledge_created_inferior): Delete.
        (setup_target_debug): Remove setting of
        current_target.to_acknowledge_created_inferior.

6 files changed, 17 insertions, 43 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index fa158c00823..9de2f460798 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,20 @@
+2010-12-28  Joel Brobecker  <brobecker@adacore.com>
+
+	* inf-child.c (inf_child_acknowledge_created_inferior): Delete.
+	(inf_child_target): Do not set t->to_acknowledge_created_inferior.
+	* inf-ptrace.c (inf_ptrace_create_inferior): Remove call to
+	target_acknowledge_created_inferior.
+	* inf-ttrace.c (inf_ttrace_him): Likewise.
+	* target.h (struct target_ops): Delete to_acknowledge_created_inferior
+	field.
+	(target_acknowledge_created_inferior): Delete.
+	* target.c (update_current_target): Remove setting of
+	to_acknowledge_created_inferior field. Do default value for that
+	field either.
+	(debug_to_acknowledge_created_inferior): Delete.
+	(setup_target_debug): Remove setting of
+	current_target.to_acknowledge_created_inferior.
+
 2010-12-27  Pedro Alves  <pedro@codesourcery.com>
 
 	gdb/
diff --git a/gdb/inf-child.c b/gdb/inf-child.c
index 72a18e41b98..ef652b8763e 100644
--- a/gdb/inf-child.c
+++ b/gdb/inf-child.c
@@ -88,13 +88,6 @@ inf_child_post_startup_inferior (ptid_t ptid)
 }
 
 static void
-inf_child_acknowledge_created_inferior (int pid)
-{
-  /* This version of Unix doesn't require a meaningful "acknowledge
-     created inferior" operation by a debugger.  */
-}
-
-static void
 inf_child_insert_fork_catchpoint (int pid)
 {
   /* This version of Unix doesn't support notification of fork
@@ -192,7 +185,6 @@ inf_child_target (void)
   t->to_terminal_ours = terminal_ours;
   t->to_terminal_info = child_terminal_info;
   t->to_post_startup_inferior = inf_child_post_startup_inferior;
-  t->to_acknowledge_created_inferior = inf_child_acknowledge_created_inferior;
   t->to_insert_fork_catchpoint = inf_child_insert_fork_catchpoint;
   t->to_remove_fork_catchpoint = inf_child_remove_fork_catchpoint;
   t->to_insert_vfork_catchpoint = inf_child_insert_vfork_catchpoint;
diff --git a/gdb/inf-ptrace.c b/gdb/inf-ptrace.c
index 440f2ed7e7f..d64c5195fc3 100644
--- a/gdb/inf-ptrace.c
+++ b/gdb/inf-ptrace.c
@@ -139,13 +139,6 @@ inf_ptrace_create_inferior (struct target_ops *ops,
   if (! ops_already_pushed)
     discard_cleanups (back_to);
 
-  /* On some targets, there must be some explicit synchronization
-     between the parent and child processes after the debugger
-     forks, and before the child execs the debuggee program.  This
-     call basically gives permission for the child to exec.  */
-
-  target_acknowledge_created_inferior (pid);
-
   /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will
      be 1 or 2 depending on whether we're starting without or with a
      shell.  */
diff --git a/gdb/inf-ttrace.c b/gdb/inf-ttrace.c
index aa0462ff235..dd1c4bad5b2 100644
--- a/gdb/inf-ttrace.c
+++ b/gdb/inf-ttrace.c
@@ -625,13 +625,6 @@ inf_ttrace_him (struct target_ops *ops, int pid)
 
   push_target (ops);
 
-  /* On some targets, there must be some explicit synchronization
-     between the parent and child processes after the debugger forks,
-     and before the child execs the debuggee program.  This call
-     basically gives permission for the child to exec.  */
-
-  target_acknowledge_created_inferior (pid);
-
   /* START_INFERIOR_TRAPS_EXPECTED is defined in inferior.h, and will
      be 1 or 2 depending on whether we're starting without or with a
      shell.  */
diff --git a/gdb/target.c b/gdb/target.c
index 59841258554..91a38410591 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -624,7 +624,6 @@ update_current_target (void)
       INHERIT (to_lookup_symbol, t);
       /* Do no inherit to_create_inferior.  */
       INHERIT (to_post_startup_inferior, t);
-      INHERIT (to_acknowledge_created_inferior, t);
       INHERIT (to_insert_fork_catchpoint, t);
       INHERIT (to_remove_fork_catchpoint, t);
       INHERIT (to_insert_vfork_catchpoint, t);
@@ -778,9 +777,6 @@ update_current_target (void)
   de_fault (to_post_startup_inferior,
 	    (void (*) (ptid_t))
 	    target_ignore);
-  de_fault (to_acknowledge_created_inferior,
-	    (void (*) (int))
-	    target_ignore);
   de_fault (to_insert_fork_catchpoint,
 	    (void (*) (int))
 	    tcomplain);
@@ -3649,15 +3645,6 @@ debug_to_post_startup_inferior (ptid_t ptid)
 }
 
 static void
-debug_to_acknowledge_created_inferior (int pid)
-{
-  debug_target.to_acknowledge_created_inferior (pid);
-
-  fprintf_unfiltered (gdb_stdlog, "target_acknowledge_created_inferior (%d)\n",
-		      pid);
-}
-
-static void
 debug_to_insert_fork_catchpoint (int pid)
 {
   debug_target.to_insert_fork_catchpoint (pid);
@@ -3831,7 +3818,6 @@ setup_target_debug (void)
   current_target.to_load = debug_to_load;
   current_target.to_lookup_symbol = debug_to_lookup_symbol;
   current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
-  current_target.to_acknowledge_created_inferior = debug_to_acknowledge_created_inferior;
   current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
   current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
   current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
diff --git a/gdb/target.h b/gdb/target.h
index 7290d90151c..ea27b2ce310 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -467,7 +467,6 @@ struct target_ops
     void (*to_create_inferior) (struct target_ops *, 
 				char *, char *, char **, int);
     void (*to_post_startup_inferior) (ptid_t);
-    void (*to_acknowledge_created_inferior) (int);
     void (*to_insert_fork_catchpoint) (int);
     int (*to_remove_fork_catchpoint) (int);
     void (*to_insert_vfork_catchpoint) (int);
@@ -1026,12 +1025,6 @@ void target_create_inferior (char *exec_file, char *args,
 #define target_post_startup_inferior(ptid) \
      (*current_target.to_post_startup_inferior) (ptid)
 
-/* On some targets, the sequence of starting up an inferior requires
-   some synchronization between gdb and the new inferior process, PID.  */
-
-#define target_acknowledge_created_inferior(pid) \
-     (*current_target.to_acknowledge_created_inferior) (pid)
-
 /* On some targets, we can catch an inferior fork or vfork event when
    it occurs.  These functions insert/remove an already-created
    catchpoint for such events.  */