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Minor fix to buffer stats.

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Do not segfault when writing buffer stats when we haven't observed a
single circuit to report about.  This is a minor bug that would only show
up in testing environments with no traffic and with reduced stats
intervals.
This commit is contained in:
Karsten Loesing 2009-12-03 10:51:51 +01:00
parent 0faf5c5fd2
commit 16fbb2f745
1 changed files with 7 additions and 0 deletions
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7
src/or/rephist.c
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@ -2701,9 +2701,16 @@ rep_hist_buffer_stats_write(time_t now)
memset(circs_in_share, 0, SHARES * sizeof(int)); memset(circs_in_share, 0, SHARES * sizeof(int));
memset(queued_cells, 0, SHARES * sizeof(double)); memset(queued_cells, 0, SHARES * sizeof(double));
memset(time_in_queue, 0, SHARES * sizeof(double)); memset(time_in_queue, 0, SHARES * sizeof(double));
if (!circuits_for_buffer_stats)
circuits_for_buffer_stats = smartlist_create();
smartlist_sort(circuits_for_buffer_stats, smartlist_sort(circuits_for_buffer_stats,
_buffer_stats_compare_entries); _buffer_stats_compare_entries);
number_of_circuits = smartlist_len(circuits_for_buffer_stats); number_of_circuits = smartlist_len(circuits_for_buffer_stats);
if (number_of_circuits < 1) {
log_info(LD_HIST, "Attempt to write cell statistics to disk failed. "
"We haven't seen a single circuit to report about.");
goto done;
}
i = 0; i = 0;
SMARTLIST_FOREACH_BEGIN(circuits_for_buffer_stats, SMARTLIST_FOREACH_BEGIN(circuits_for_buffer_stats,
circ_buffer_stats_t *, stat) circ_buffer_stats_t *, stat)