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[3/8] KVM: selftests: Assert that __vm_get_stat() actually finds a stat

Message ID 20241220013906.3518334-4-seanjc@google.com (mailing list archive)
State New
Headers show
Series KVM: selftests: Binary stats fixes and infra updates | expand

Commit Message

Sean Christopherson Dec. 20, 2024, 1:39 a.m. UTC 
Fail the test if it attempts to read a stat that doesn't exist, e.g. due
to a typo, or because the test tried to get a stat for the wrong scope.
As is, there's no indiciation of failure and @data is left untouched,
e.g. holds '0' or random stack data in most cases.

Fixes: 8448ec5993be ("KVM: selftests: Add NX huge pages test")
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 tools/testing/selftests/kvm/lib/kvm_util.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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Patch

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 9138801ecb60..21b5a6261106 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -2238,9 +2238,10 @@  void __vm_get_stat(struct kvm_vm *vm, const char *stat_name, uint64_t *data,
 
 		read_stat_data(vm->stats_fd, &vm->stats_header, desc,
 			       data, max_elements);
-
-		break;
+		return;
 	}
+
+	TEST_FAIL("Unabled to find stat '%s'", stat_name);
 }
 
 __weak void kvm_arch_vm_post_create(struct kvm_vm *vm)