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sched: Rate limit scheduler_bug_occurred()

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Just in case we end up hitting a SCHED_BUG() multiple times, rate limit the
log warning.

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2017-10-26 14:44:44 -04:00 committed by Nick Mathewson
parent 52050bb2c6
commit 6dc591a024
1 changed files with 15 additions and 4 deletions
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15
src/or/scheduler.c
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@ -690,10 +690,21 @@ scheduler_bug_occurred(const channel_t *chan)
outbuf_len); outbuf_len);
} }
log_warn(LD_BUG, "%s Num pending channels: %d. Channel in pending list: %s", {
char *msg;
/* Rate limit every 60 seconds. If we start seeing this every 60 sec, we
* know something is stuck/wrong. It *should* be loud but not too much. */
static ratelim_t rlimit = RATELIM_INIT(60);
if ((msg = rate_limit_log(&rlimit, approx_time()))) {
log_warn(LD_BUG, "%s Num pending channels: %d. "
"Channel in pending list: %s.%s",
(chan != NULL) ? buf : "No channel in bug context.", (chan != NULL) ? buf : "No channel in bug context.",
smartlist_len(channels_pending), smartlist_len(channels_pending),
(smartlist_pos(channels_pending, chan) == -1) ? "no" : "yes"); (smartlist_pos(channels_pending, chan) == -1) ? "no" : "yes",
msg);
tor_free(msg);
}
}
} }
#ifdef TOR_UNIT_TESTS #ifdef TOR_UNIT_TESTS