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contrib/plugins: fix coverity warning in cache

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Coverity complains that appends_stats_line can be fed a 0 leading
to the undefined behaviour of a divide by 0.

Fixes: CID 1519044
Fixes: CID 1519047
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231009164104.369749-24-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2023-10-09 17:41:02 +01:00
parent a392277dcf
commit 60cb16c0d8
1 changed files with 8 additions and 10 deletions
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18
contrib/plugins/cache.c
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@ -535,15 +535,13 @@ static void caches_free(Cache **caches)
} }
} }
static void append_stats_line(GString *line, uint64_t l1_daccess, static void append_stats_line(GString *line,
uint64_t l1_dmisses, uint64_t l1_iaccess, uint64_t l1_daccess, uint64_t l1_dmisses,
uint64_t l1_imisses, uint64_t l2_access, uint64_t l1_iaccess, uint64_t l1_imisses,
uint64_t l2_misses) uint64_t l2_access, uint64_t l2_misses)
{ {
double l1_dmiss_rate, l1_imiss_rate, l2_miss_rate; double l1_dmiss_rate = ((double) l1_dmisses) / (l1_daccess) * 100.0;
double l1_imiss_rate = ((double) l1_imisses) / (l1_iaccess) * 100.0;
l1_dmiss_rate = ((double) l1_dmisses) / (l1_daccess) * 100.0;
l1_imiss_rate = ((double) l1_imisses) / (l1_iaccess) * 100.0;
g_string_append_printf(line, "%-14" PRIu64 " %-12" PRIu64 " %9.4lf%%" g_string_append_printf(line, "%-14" PRIu64 " %-12" PRIu64 " %9.4lf%%"
" %-14" PRIu64 " %-12" PRIu64 " %9.4lf%%", " %-14" PRIu64 " %-12" PRIu64 " %9.4lf%%",
@ -554,8 +552,8 @@ static void append_stats_line(GString *line, uint64_t l1_daccess,
l1_imisses, l1_imisses,
l1_iaccess ? l1_imiss_rate : 0.0); l1_iaccess ? l1_imiss_rate : 0.0);
if (use_l2) { if (l2_access && l2_misses) {
l2_miss_rate = ((double) l2_misses) / (l2_access) * 100.0; double l2_miss_rate = ((double) l2_misses) / (l2_access) * 100.0;
g_string_append_printf(line, g_string_append_printf(line,
" %-12" PRIu64 " %-11" PRIu64 " %10.4lf%%", " %-12" PRIu64 " %-11" PRIu64 " %10.4lf%%",
l2_access, l2_access,