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bug#29170: Infinite loop noticed on Emacs in OpenBSD
From: |
Manuel Giraud |
Subject: |
bug#29170: Infinite loop noticed on Emacs in OpenBSD |
Date: |
Thu, 09 Nov 2017 16:06:22 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (berkeley-unix) |
Hi,
Here is a patch against HEAD to avoid the hang in infinite loop. The
'x-selection-timeout' pause will still be there even with this patch.
My understandings:
On OpenBSD, most of the time, the function
"xselect.c/x_get_foreign_selection" won't get a SelectNotify with
(SECONDARY, TEXT) as arguments (that I did not understand and it might
never happen on other oses).
But then, while waiting at most 'x-selection-timeout' into
"process.c/wait_reading_process_output" the 'now' variable won't have a
chance of being invalidated or updated and that is what cause the
infinite loop.
Someone more knowledgeable of "process.c/wait_reading_process_output"
might have a better solution to this problem.
diff --git a/src/process.c b/src/process.c
index fc46e74332..25bd28a82b 100644
--- a/src/process.c
+++ b/src/process.c
@@ -5115,8 +5115,7 @@ wait_reading_process_output (intmax_t time_limit, int
nsecs, int read_kbd,
/* Exit if already run out. */
if (wait == TIMEOUT)
{
- if (!timespec_valid_p (now))
- now = current_timespec ();
+ now = current_timespec ();
if (timespec_cmp (end_time, now) <= 0)
break;
timeout = timespec_sub (end_time, now);
--
Manuel Giraud