From: Sean Christopherson <seanjc@google.com>
To: "Wang, Wei W" <wei.w.wang@intel.com>
Cc: Vipin Sharma <vipinsh@google.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"dmatlack@google.com" <dmatlack@google.com>,
"andrew.jones@linux.dev" <andrew.jones@linux.dev>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v6 3/5] KVM: selftests: Add atoi_paranoid() to catch errors missed by atoi()
Date: Wed, 26 Oct 2022 15:10:53 +0000 [thread overview]
Message-ID: <Y1lN/YRc2B3KoR+n@google.com> (raw)
In-Reply-To: <DS0PR11MB63733C7CA0B1497215B40F8DDC309@DS0PR11MB6373.namprd11.prod.outlook.com>
On Wed, Oct 26, 2022, Wang, Wei W wrote:
> On Saturday, October 22, 2022 5:18 AM, Vipin Sharma wrote:
> > +int atoi_paranoid(const char *num_str)
> > +{
> > + char *end_ptr;
> > + long num;
> > +
> > + errno = 0;
> > + num = strtol(num_str, &end_ptr, 10);
>
> Why not use strtoull here?
This intended to be a drop in replacement for atoi(), which allows negative
numbers.
> Negative numbers will result in a huge "unsigned long long" number,
> and this will be captured by your TEST_ASSERT(num >= INT_MIN) below.
As above, we want to allow negative numbers, e.g. memslot_perf_test.c uses '-1'
to indicate "as many slots as possible".
It's unlikely a test will As unlikely as
> Then we don't need patch 4, I think.
Even if this low level helper disallowed negative numbers, patch 4 still has value
in that the wrappers make the code self-documenting, i.e. makes it very obvious
what input values are allowed.
next prev parent reply other threads:[~2022-10-26 15:11 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-21 21:18 [PATCH v6 0/5] dirty_log_perf_test vCPU pinning Vipin Sharma
2022-10-21 21:18 ` [PATCH v6 1/5] KVM: selftests: Add missing break between -e and -g option in dirty_log_perf_test Vipin Sharma
2022-10-21 21:18 ` [PATCH v6 2/5] KVM: selftests: Put command line options in alphabetical order " Vipin Sharma
2022-10-26 2:09 ` Wang, Wei W
2022-10-26 15:04 ` Sean Christopherson
2022-10-26 17:45 ` Vipin Sharma
2022-10-21 21:18 ` [PATCH v6 3/5] KVM: selftests: Add atoi_paranoid() to catch errors missed by atoi() Vipin Sharma
2022-10-26 2:16 ` Wang, Wei W
2022-10-26 15:10 ` Sean Christopherson [this message]
2022-10-21 21:18 ` [PATCH v6 4/5] KVM: selftests: Add atoi_positive() and atoi_non_negative() for input validation Vipin Sharma
2022-10-21 21:18 ` [PATCH v6 5/5] KVM: selftests: Allowing running dirty_log_perf_test on specific CPUs Vipin Sharma
2022-10-26 2:27 ` Wang, Wei W
2022-10-26 15:44 ` Sean Christopherson
2022-10-26 18:17 ` Vipin Sharma
2022-10-27 12:03 ` Wang, Wei W
2022-10-27 15:56 ` Sean Christopherson
2022-10-27 20:02 ` Vipin Sharma
2022-10-27 20:23 ` Sean Christopherson
2022-10-28 2:11 ` Wang, Wei W
2022-10-28 17:37 ` Vipin Sharma
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