Revert "gdb: remove unnecessary parameter wait_ptid from do_target_wait"

This reverts commit ac0d67ed1dcf470bad6a3bc4800c2ddc9bedecca.

There was nothing wrong with the commit which I'm reverting here, but
it removed some functionality that will be needed for a later commit;
that is, the ability for GDB to ask for events from a specific ptid_t
via the do_target_wait function.

In a follow up commit, this functionality will be used to implement
inferior function calls in multi-threaded inferiors.

diff --git a/gdb/infrun.c b/gdb/infrun.c
index edfb5ab0a91f47b1e4f86814f22eae1abbdc8a1a..5af8635a1ab66d5881b3f0b08795ca741d27e070 100644 (file)
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -3741,7 +3741,8 @@ do_target_wait_1 (inferior *inf, ptid_t ptid,
    more events.  Polls for events from all inferiors/targets.  */
 
 static bool
-do_target_wait (execution_control_state *ecs, target_wait_flags options)
+do_target_wait (ptid_t wait_ptid, execution_control_state *ecs,
+               target_wait_flags options)
 {
   int num_inferiors = 0;
   int random_selector;
@@ -3751,9 +3752,10 @@ do_target_wait (execution_control_state *ecs, target_wait_flags options)
      polling the rest of the inferior list starting from that one in a
      circular fashion until the whole list is polled once.  */
 
-  auto inferior_matches = [] (inferior *inf)
+  auto inferior_matches = [&wait_ptid] (inferior *inf)
     {
-      return inf->process_target () != nullptr;
+      return (inf->process_target () != NULL
+             && ptid_t (inf->pid).matches (wait_ptid));
     };
 
   /* First see how many matching inferiors we have.  */
@@ -3792,7 +3794,7 @@ do_target_wait (execution_control_state *ecs, target_wait_flags options)
 
   auto do_wait = [&] (inferior *inf)
   {
-    ecs->ptid = do_target_wait_1 (inf, minus_one_ptid, &ecs->ws, options);
+    ecs->ptid = do_target_wait_1 (inf, wait_ptid, &ecs->ws, options);
     ecs->target = inf->process_target ();
     return (ecs->ws.kind () != TARGET_WAITKIND_IGNORE);
   };
@@ -4169,7 +4171,7 @@ fetch_inferior_event ()
        the event.  */
     scoped_disable_commit_resumed disable_commit_resumed ("handling event");
 
-    if (!do_target_wait (&ecs, TARGET_WNOHANG))
+    if (!do_target_wait (minus_one_ptid, &ecs, TARGET_WNOHANG))
       {
        infrun_debug_printf ("do_target_wait returned no event");
        disable_commit_resumed.reset_and_commit ();