| Message ID | 20240312183810.557768-7-peter.maydell@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | various: 7 minor Coverity fixes | expand |
On 12/03/2024 19.38, Peter Maydell wrote: > In test_compute_wait() we do > double units = bkt.max / 10; > which does an integer division and then assigns it to a double variable, > and similarly later on in the expression for an assertion. > > Use 10.0 so that we do a floating point division and calculate the > exact value, rather than doing an integer division. > > Spotted by Coverity. > > Resolves: Coverity CID 1432564 > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> > --- > tests/unit/test-throttle.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/tests/unit/test-throttle.c b/tests/unit/test-throttle.c > index 2146cfacd36..24032a02667 100644 > --- a/tests/unit/test-throttle.c > +++ b/tests/unit/test-throttle.c > @@ -127,13 +127,13 @@ static void test_compute_wait(void) > bkt.avg = 10; > bkt.max = 200; > for (i = 0; i < 22; i++) { > - double units = bkt.max / 10; > + double units = bkt.max / 10.0; > bkt.level += units; > bkt.burst_level += units; > throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 10); > wait = throttle_compute_wait(&bkt); > g_assert(double_cmp(bkt.burst_level, 0)); > - g_assert(double_cmp(bkt.level, (i + 1) * (bkt.max - bkt.avg) / 10)); > + g_assert(double_cmp(bkt.level, (i + 1) * (bkt.max - bkt.avg) / 10.0)); > /* We can do bursts for the 2 seconds we have configured in > * burst_length. We have 100 extra milliseconds of burst > * because bkt.level has been leaking during this time. Reviewed-by: Thomas Huth <thuth@redhat.com>
diff --git a/tests/unit/test-throttle.c b/tests/unit/test-throttle.c index 2146cfacd36..24032a02667 100644 --- a/tests/unit/test-throttle.c +++ b/tests/unit/test-throttle.c @@ -127,13 +127,13 @@ static void test_compute_wait(void) bkt.avg = 10; bkt.max = 200; for (i = 0; i < 22; i++) { - double units = bkt.max / 10; + double units = bkt.max / 10.0; bkt.level += units; bkt.burst_level += units; throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 10); wait = throttle_compute_wait(&bkt); g_assert(double_cmp(bkt.burst_level, 0)); - g_assert(double_cmp(bkt.level, (i + 1) * (bkt.max - bkt.avg) / 10)); + g_assert(double_cmp(bkt.level, (i + 1) * (bkt.max - bkt.avg) / 10.0)); /* We can do bursts for the 2 seconds we have configured in * burst_length. We have 100 extra milliseconds of burst * because bkt.level has been leaking during this time.
In test_compute_wait() we do double units = bkt.max / 10; which does an integer division and then assigns it to a double variable, and similarly later on in the expression for an assertion. Use 10.0 so that we do a floating point division and calculate the exact value, rather than doing an integer division. Spotted by Coverity. Resolves: Coverity CID 1432564 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- tests/unit/test-throttle.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)