Make gdb/linux-nat.c consider a waitstatus pending on the infrun side

Working on the fix for gdb/19828, I saw
gdb.threads/attach-many-short-lived-threads.exp fail once in an
unusual way.  Unfortunately I didn't keep debug logs, but it's an
issue similar to what's been fixed in remote.c a while ago --
linux-nat.c was not fetching the pending status from the right place.

gdb/ChangeLog:
2016-05-24  Pedro Alves  <palves@redhat.com>

	PR gdb/19828
	* linux-nat.c (get_pending_status): If the thread reported the
	event to the core and it's pending, use the pending status signal
	number.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d08372b..fa20332 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,6 +1,13 @@
 2016-05-24  Pedro Alves  <palves@redhat.com>
 
        PR gdb/19828
+       * linux-nat.c (get_pending_status): If the thread reported the
+       event to the core and it's pending, use the pending status signal
+       number.
+
+2016-05-24  Pedro Alves  <palves@redhat.com>
+
+       PR gdb/19828
        * linux-nat.c (lwp_lwpid_htab): New htab.
        (lwp_info_hash, lwp_lwpid_htab_eq, lwp_lwpid_htab_create)
        (lwp_lwpid_htab_add_lwp): New functions.

diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 6cd9fc6..fdd1ae4 100644 (file)
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -1320,7 +1320,10 @@ get_pending_status (struct lwp_info *lp, int *status)
     {
       struct thread_info *tp = find_thread_ptid (lp->ptid);
 
-      signo = tp->suspend.stop_signal;
+      if (tp->suspend.waitstatus_pending_p)
+       signo = tp->suspend.waitstatus.value.sig;
+      else
+       signo = tp->suspend.stop_signal;
     }
   else if (!target_is_non_stop_p ())
     {