Non-stop linux native.

	* linux-nat.c (linux_test_for_tracefork): Block events while we're
	here.
	(get_pending_status): Implement non-stop mode.
	(linux_nat_detach): Stop threads before detaching.
	(linux_nat_resume): In non-stop mode, always resume only a single
	PTID.
	(linux_handle_extended_wait): On a clone event, in non-stop mode,
	add new lwp to GDB's thread table, and mark as running, executing
	and stopped appropriately.
	(linux_nat_filter_event): Don't assume there are other running
	threads when a thread exits.
	(linux_nat_wait): Mark the main thread as running and executing.
	In non-stop mode, don't stop all lwps.
	(linux_nat_kill): Stop lwps before killing them.
	(linux_nat_thread_alive): Use signal 0 to detect if a thread is
	alive.
	(send_sigint_callback): New.
	(linux_nat_stop): New.
	(linux_nat_add_target): Set to_stop to linux_nat_stop.

	* linux-nat.h (thread_db_attach_lwp): Declare.

	* linux-thread-db.c (thread_get_info_callback): Check for new
	threads if we have none.
	(thread_from_lwp, enable_thread_event): Set proc_handle.pid to the
	stopped lwp.  Check for new threads if we have none.
	(thread_db_attach_lwp): New.
	(thread_db_init): Set proc_handle.pid to inferior_ptid.
	(check_event): Set proc_handle.pid to the stopped lwp.
	(thread_db_find_new_threads): Set proc_handle.pid to any stopped
	lwp available, bail out if there is none.

	* linux-fork.c (linux_fork_killall): Use SIGKILL instead of
	PTRACE_KILL.

1 files changed, 2 insertions, 0 deletions

diff --git a/gdb/linux-nat.h b/gdb/linux-nat.h
index 48c9a0c..f3386f7 100644
--- a/gdb/linux-nat.h
+++ b/gdb/linux-nat.h
@@ -94,6 +94,8 @@ void check_for_thread_db (void);
 /* Tell the thread_db layer what native target operations to use.  */
 void thread_db_init (struct target_ops *);
 
+int thread_db_attach_lwp (ptid_t ptid);
+
 /* Find process PID's pending signal set from /proc/pid/status.  */
 void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored);