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KVM: selftests: Annotate guest ucall, printf, and assert helpers with __printf()

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Annotate guest printf helpers with __printf() so that the compiler will
warn about incorrect formatting at compile time (see git log for how easy
it is to screw up with the formatting).

Suggested-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20231129224916.532431-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2023-11-29 14:49:16 -08:00
parent f813e6d41b
commit 1b2658e4c7
2 changed files with 5 additions and 4 deletions
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2
tools/testing/selftests/kvm/include/test_util.h
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@@ -191,7 +191,7 @@ static inline uint32_t atoi_non_negative(const char *name, const char *num_str)
}
int guest_vsnprintf(char *buf, int n, const char *fmt, va_list args);
int guest_snprintf(char *buf, int n, const char *fmt, ...);
__printf(3, 4) int guest_snprintf(char *buf, int n, const char *fmt, ...);
char *strdup_printf(const char *fmt, ...) __attribute__((format(printf, 1, 2), nonnull(1)));

7
tools/testing/selftests/kvm/include/ucall_common.h
View File

@@ -34,9 +34,10 @@ void ucall_arch_do_ucall(vm_vaddr_t uc);
void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu);
void ucall(uint64_t cmd, int nargs, ...);
void ucall_fmt(uint64_t cmd, const char *fmt, ...);
void ucall_assert(uint64_t cmd, const char *exp, const char *file,
unsigned int line, const char *fmt, ...);
__printf(2, 3) void ucall_fmt(uint64_t cmd, const char *fmt, ...);
__printf(5, 6) void ucall_assert(uint64_t cmd, const char *exp,
const char *file, unsigned int line,
const char *fmt, ...);
uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);
void ucall_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa);
int ucall_nr_pages_required(uint64_t page_size);