[PATCH net-next v6 09/11] seccomp: Enhance test_harness with an assert step mechanism

[Mickaël Salaün]

This is useful to return an information about the error without being
able to write to TH_LOG_STREAM.

Helpers from test_harness.h may be useful outside of the seccomp
directory.

Signed-off-by: Mickaël Salaün <m...@digikod.net>
Cc: Andy Lutomirski <l...@amacapital.net>
Cc: Arnaldo Carvalho de Melo <a...@kernel.org>
Cc: Kees Cook <keesc...@chromium.org>
Cc: Shuah Khan <sh...@kernel.org>
Cc: Will Drewry <w...@chromium.org>
---
 tools/testing/selftests/seccomp/test_harness.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/seccomp/test_harness.h 
b/tools/testing/selftests/seccomp/test_harness.h
index a786c69c7584..77e407663e06 100644
--- a/tools/testing/selftests/seccomp/test_harness.h
+++ b/tools/testing/selftests/seccomp/test_harness.h
@@ -397,7 +397,7 @@ struct __test_metadata {
        const char *name;
        void (*fn)(struct __test_metadata *);
        int termsig;
-       int passed;
+       __s8 passed;
        int trigger; /* extra handler after the evaluation */
        struct __test_metadata *prev, *next;
 };
@@ -476,6 +476,12 @@ void __run_test(struct __test_metadata *t)
                                        "instead of by signal (code: %d)\n",
                                        t->name,
                                        WEXITSTATUS(status));
+                       } else if (t->passed < 0) {
+                               fprintf(TH_LOG_STREAM,
+                                       "%s: Failed at step #%d\n",
+                                       t->name,
+                                       t->passed * -1);
+                               t->passed = 0;
                        }
                } else if (WIFSIGNALED(status)) {
                        t->passed = 0;
-- 
2.11.0