KVM: selftests: Print the errno besides error-string in TEST_ASSERT

Print the errno besides error-string in TEST_ASSERT in the format of
"errno=%d - %s" will explicitly indicate that the string is an error
information. Besides, the errno is easier to be used for debugging
than the error-string.

Suggested-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20210330080856.14940-5-wangyanan55@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
index 5ebbd0d..71ade61 100644 (file)
--- a/tools/testing/selftests/kvm/lib/assert.c
+++ b/tools/testing/selftests/kvm/lib/assert.c
@@ -71,9 +71,9 @@ test_assert(bool exp, const char *exp_str,
 
                fprintf(stderr, "==== Test Assertion Failure ====\n"
                        "  %s:%u: %s\n"
-                       "  pid=%d tid=%d - %s\n",
+                       "  pid=%d tid=%d errno=%d - %s\n",
                        file, line, exp_str, getpid(), _gettid(),
-                       strerror(errno));
+                       errno, strerror(errno));
                test_dump_stack();
                if (fmt) {
                        fputs("  ", stderr);