[PATCH 1/3] Fix up some target is-async vs can-async confusions

Pedro Alves
2015-01-26T17:19:39Z

In all these cases we're interested in whether the target is currently
async, with its event sources installed in the event loop, not whether
it can async if needed. Also, I'm not seeing the point of the
target_async call from within linux_nat_wait. That's normally done on
resume instead, which this target already does.

Tested on x86_64 Fedora 20, native and gdbserver.

gdb/
2015-01-26 Pedro Alves <palves@redhat.com>

* linux-nat.c (linux_child_follow_fork, linux_nat_wait_1): Use
target_is_async_p instead of target_can_async.
(linux_nat_wait): Use target_is_async_p instead of
target_can_async. Don't enable async here.
* remote.c (interrupt_query, remote_wait, putpkt_binary): Use
target_is_async_p instead of target_can_async.
---
gdb/linux-nat.c | 16 ++++++----------
gdb/remote.c | 6 +++---
2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index b49cd57..b4893d44 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -520,7 +520,7 @@ linux_child_follow_fork (struct target_ops *ops, int follow_child,

/* If we're in async mode, need to tell the event loop
there's something here to process. */
- if (target_can_async_p ())
+ if (target_is_async_p ())
async_file_mark ();
}
}
@@ -3222,7 +3222,7 @@ linux_nat_wait_1 (struct target_ops *ops,
target_pid_to_str (lp->ptid));
}

- if (!target_can_async_p ())
+ if (!target_is_async_p ())
{
/* Causes SIGINT to be passed on to the attached process. */
set_sigint_trap ();
@@ -3293,7 +3293,7 @@ linux_nat_wait_1 (struct target_ops *ops,

ourstatus->kind = TARGET_WAITKIND_NO_RESUMED;

- if (!target_can_async_p ())
+ if (!target_is_async_p ())
clear_sigint_trap ();

restore_child_signals_mask (&prev_mask);
@@ -3321,7 +3321,7 @@ linux_nat_wait_1 (struct target_ops *ops,
sigsuspend (&suspend_mask);
}

- if (!target_can_async_p ())
+ if (!target_is_async_p ())
clear_sigint_trap ();

gdb_assert (lp);
@@ -3479,7 +3479,7 @@ linux_nat_wait (struct target_ops *ops,
}

/* Flush the async file first. */
- if (target_can_async_p ())
+ if (target_is_async_p ())
async_file_flush ();

/* Resume LWPs that are currently stopped without any pending status
@@ -3497,16 +3497,12 @@ linux_nat_wait (struct target_ops *ops,
/* If we requested any event, and something came out, assume there
may be more. If we requested a specific lwp or process, also
assume there may be more. */
- if (target_can_async_p ()
+ if (target_is_async_p ()
&& ((ourstatus->kind != TARGET_WAITKIND_IGNORE
&& ourstatus->kind != TARGET_WAITKIND_NO_RESUMED)
|| !ptid_equal (ptid, minus_one_ptid)))
async_file_mark ();

- /* Get ready for the next event. */
- if (target_can_async_p ())
- target_async (inferior_event_handler, 0);
-
return event_ptid;
}

diff --git a/gdb/remote.c b/gdb/remote.c
index c4d09ba..9be15cb 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -5079,7 +5079,7 @@ interrupt_query (void)
{
target_terminal_ours ();

- if (target_can_async_p ())
+ if (target_is_async_p ())
{
signal (SIGINT, handle_sigint);
quit ();
@@ -6036,7 +6036,7 @@ remote_wait (struct target_ops *ops,
else
event_ptid = remote_wait_as (ptid, status, options);

- if (target_can_async_p ())
+ if (target_is_async_p ())
{
/* If there are are events left in the queue tell the event loop
to return here. */
@@ -7226,7 +7226,7 @@ putpkt_binary (const char *buf, int cnt)
case it's not possible to issue a command while the target is
running. This is not a problem in non-stop mode, because in that
case, the stub is always ready to process serial input. */
- if (!non_stop && target_can_async_p () && rs->waiting_for_stop_reply)
+ if (!non_stop && target_is_async_p () && rs->waiting_for_stop_reply)
{
error (_("Cannot execute this command while the target is running.\n"
"Use the \"interrupt\" command to stop the target\n"
--
1.9.3