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tests/unit/test-throttle: Avoid unintended integer division 

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>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20240312183810.557768-7-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2024-03-25 10:41:01 +00:00
parent b13ba381ca
commit 43199b1393
1 changed files with 2 additions and 2 deletions
tests/unit
test-throttle.c

4
tests/unit/test-throttle.c
View File

@ -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.