gdb/

	* gdbthread.h (struct thread_info): New `pending_follow' field.
	* thread.c (new_thread): New function.
	(add_thread_silent): Use it.
	* breakpoint.c (internal_breakpoint_number): New global, moved
	from inside...
	(create_internal_breakpoint): ... this.
	(clone_momentary_breakpoint): New.
	* breakpoint.h (clone_momentary_breakpoint): Declare.
	* infrun.c (nullify_last_target_wait_ptid): Move declaration
	higher.
	(pending_follow): Delete.
	(follow_fork): Handle pending follow fork event here.  Moved the
	preserving of thread stepping state here.
	(resume): Don't handle pending follow fork events here.  Only
	install the inferior's terminal modes if we're about to resume it.
	(proceed): Handle possible pending follow fork events here.
	(init_wait_for_inferior): No need to clear pending_follow anymore,
	it's gone.
	(handle_inferior_event): Adjust to per-thread `pending_follow'.
	Call `follow_fork' to handle following the fork.  If the
	follow-fork is cancelled, stop stepping.
	* linux-nat.c (linux_child_follow_fork): Adjust to per-thread
	`pending_follow' events.  Remove code that handled preserving the
	thread stepping state.
	* inf-ptrace.c (inf_ptrace_follow_fork): Ditto.
	* inf-ttrace.c (inf_ttrace_follow_fork): Ditto.

gdb/testsuite/
	* gdb.threads/fork-thread-pending.c: New.
	* gdb.threads/fork-thread-pending.exp: New.

1 files changed, 7 insertions, 30 deletions

diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 9057442..f93ea9f 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -575,19 +575,17 @@ static int
 linux_child_follow_fork (struct target_ops *ops, int follow_child)
 {
   sigset_t prev_mask;
-  ptid_t last_ptid;
-  struct target_waitstatus last_status;
   int has_vforked;
   int parent_pid, child_pid;
 
   block_child_signals (&prev_mask);
 
-  get_last_target_status (&last_ptid, &last_status);
-  has_vforked = (last_status.kind == TARGET_WAITKIND_VFORKED);
-  parent_pid = ptid_get_lwp (last_ptid);
+  has_vforked = (inferior_thread ()->pending_follow.kind
+		 == TARGET_WAITKIND_VFORKED);
+  parent_pid = ptid_get_lwp (inferior_ptid);
   if (parent_pid == 0)
-    parent_pid = ptid_get_pid (last_ptid);
-  child_pid = PIDGET (last_status.value.related_pid);
+    parent_pid = ptid_get_pid (inferior_ptid);
+  child_pid = PIDGET (inferior_thread ()->pending_follow.value.related_pid);
 
   if (! follow_child)
     {
@@ -625,7 +623,7 @@ linux_child_follow_fork (struct target_ops *ops, int follow_child)
 	  /* Add process to GDB's tables.  */
 	  child_inf = add_inferior (child_pid);
 
-	  parent_inf = find_inferior_pid (GET_PID (last_ptid));
+	  parent_inf = current_inferior ();
 	  child_inf->attach_flag = parent_inf->attach_flag;
 	  copy_terminal_info (child_inf, parent_inf);
 
@@ -692,21 +690,9 @@ linux_child_follow_fork (struct target_ops *ops, int follow_child)
     }
   else
     {
-      struct thread_info *last_tp = find_thread_pid (last_ptid);
       struct thread_info *tp;
-      char child_pid_spelling[40];
       struct inferior *parent_inf, *child_inf;
 
-      /* Copy user stepping state to the new inferior thread.  */
-      struct breakpoint *step_resume_breakpoint = last_tp->step_resume_breakpoint;
-      CORE_ADDR step_range_start = last_tp->step_range_start;
-      CORE_ADDR step_range_end = last_tp->step_range_end;
-      struct frame_id step_frame_id = last_tp->step_frame_id;
-
-      /* Otherwise, deleting the parent would get rid of this
-	 breakpoint.  */
-      last_tp->step_resume_breakpoint = NULL;
-
       /* Before detaching from the parent, remove all breakpoints from it. */
       remove_breakpoints ();
 
@@ -723,7 +709,7 @@ linux_child_follow_fork (struct target_ops *ops, int follow_child)
 
       child_inf = add_inferior (child_pid);
 
-      parent_inf = find_inferior_pid (GET_PID (last_ptid));
+      parent_inf = current_inferior ();
       child_inf->attach_flag = parent_inf->attach_flag;
       copy_terminal_info (child_inf, parent_inf);
 
@@ -772,15 +758,6 @@ linux_child_follow_fork (struct target_ops *ops, int follow_child)
 
       linux_nat_switch_fork (inferior_ptid);
       check_for_thread_db ();
-
-      tp = inferior_thread ();
-      tp->step_resume_breakpoint = step_resume_breakpoint;
-      tp->step_range_start = step_range_start;
-      tp->step_range_end = step_range_end;
-      tp->step_frame_id = step_frame_id;
-
-      /* Reset breakpoints in the child as appropriate.  */
-      follow_inferior_reset_breakpoints ();
     }
 
   restore_child_signals_mask (&prev_mask);