Re: [PATCH] qtest: Fix bad printf format specifiers

[AlexChen <alex.chen@huawei.com>]

On 2020/11/4 18:44, Thomas Huth wrote:
> On 04/11/2020 11.23, AlexChen wrote:
>> We should use printf format specifier "%u" instead of "%d" for
>> argument of type "unsigned int".
>>
>> Reported-by: Euler Robot <euler.robot@huawei.com>
>> Signed-off-by: Alex Chen <alex.chen@huawei.com>
>> ---
>>  tests/qtest/arm-cpu-features.c | 8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/tests/qtest/arm-cpu-features.c b/tests/qtest/arm-cpu-features.c
>> index d20094d5a7..bc681a95d5 100644
>> --- a/tests/qtest/arm-cpu-features.c
>> +++ b/tests/qtest/arm-cpu-features.c
>> @@ -536,7 +536,7 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
>>          if (kvm_supports_sve) {
>>              g_assert(vls != 0);
>>              max_vq = 64 - __builtin_clzll(vls);
>> -            sprintf(max_name, "sve%d", max_vq * 128);
>> +            sprintf(max_name, "sve%u", max_vq * 128);
>>
>>              /* Enabling a supported length is of course fine. */
>>              assert_sve_vls(qts, "host", vls, "{ %s: true }", max_name);
>> @@ -556,7 +556,7 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
>>                   * unless all larger, supported vector lengths are also
>>                   * disabled.
>>                   */
>> -                sprintf(name, "sve%d", vq * 128);
>> +                sprintf(name, "sve%u", vq * 128);
>>                  error = g_strdup_printf("cannot disable %s", name);
>>                  assert_error(qts, "host", error,
>>                               "{ %s: true, %s: false }",
>> @@ -569,7 +569,7 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
>>               * we need at least one vector length enabled.
>>               */
>>              vq = __builtin_ffsll(vls);
>> -            sprintf(name, "sve%d", vq * 128);
>> +            sprintf(name, "sve%u", vq * 128);
>>              error = g_strdup_printf("cannot disable %s", name);
>>              assert_error(qts, "host", error, "{ %s: false }", name);
>>              g_free(error);
>> @@ -581,7 +581,7 @@ static void test_query_cpu_model_expansion_kvm(const void *data)
>>                  }
>>              }
>>              if (vq <= SVE_MAX_VQ) {
>> -                sprintf(name, "sve%d", vq * 128);
>> +                sprintf(name, "sve%u", vq * 128);
>>                  error = g_strdup_printf("cannot enable %s", name);
>>                  assert_error(qts, "host", error, "{ %s: true }", name);
>>                  g_free(error);
>>
> 
> max_vq and vq are both "uint32_t" and not "unsigned int" ... so if you want
> to fix this really really correctly, please use PRIu32 from inttypes.h instead.
> 

Hi Thomas,
Thanks for your review.
According to the definition of the macro PRIu32(# define PRIu32         "u"),
using PRIu32 works the same as using %u to print, and using PRIu32 to print
is relatively rare in QEMU(%u 720, PRIu32 only 120). Can we continue to use %u to
print max_vq and vq in this patch.
Of course, this is just my small small suggestion. If you think it is better to use
PRIu32 for printing, I will send patch V2.
Looking forward to your reply.

Thanks,
Alex