2021-11-03 09:49:30

by Anders Roxell

Subject: [PATCHv2] selftests: kselftest.h: mark functions with 'noreturn'

When building kselftests/capabilities the following warning shows up:

clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
} else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test_execve.c:136:9: note: uninitialized use occurs here
return have_outer_privilege;
^~~~~~~~~~~~~~~~~~~~
test_execve.c:121:9: note: remove the 'if' if its condition is always true
} else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
bool have_outer_privilege;
^
= false

Rework so all the ksft_exit_*() functions have attribue
'__attribute__((noreturn))' so the compiler knows that there wont be
any return from the function. That said, without
'__attribute__((noreturn))' the compiler warns about the above issue
since it thinks that it will get back from the ksft_exit_skip()
function, which it wont.
Cleaning up the callers that rely on ksft_exit_*() return code, since
the functions ksft_exit_*() have never returned anything.

Signed-off-by: Anders Roxell <[email protected]>
---
tools/testing/selftests/clone3/clone3.c | 4 +++-
.../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
tools/testing/selftests/ipc/msgque.c | 10 +++++-----
tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
tools/testing/selftests/kselftest.h | 12 ++++++------
.../membarrier/membarrier_test_multi_thread.c | 2 +-
.../membarrier/membarrier_test_single_thread.c | 2 +-
tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
tools/testing/selftests/sync/sync_test.c | 2 +-
tools/testing/selftests/timers/adjtick.c | 4 ++--
tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
tools/testing/selftests/timers/change_skew.c | 4 ++--
tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
tools/testing/selftests/timers/freq-step.c | 4 ++--
tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
tools/testing/selftests/timers/leapcrash.c | 4 ++--
tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
tools/testing/selftests/timers/nanosleep.c | 4 ++--
tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
tools/testing/selftests/timers/raw_skew.c | 6 +++---
tools/testing/selftests/timers/set-2038.c | 4 ++--
tools/testing/selftests/timers/set-tai.c | 4 ++--
tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
tools/testing/selftests/timers/set-tz.c | 4 ++--
tools/testing/selftests/timers/skew_consistency.c | 4 ++--
tools/testing/selftests/timers/threadtest.c | 2 +-
tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
tools/testing/selftests/vm/madv_populate.c | 2 +-
35 files changed, 80 insertions(+), 74 deletions(-)

diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index 42be3b925830..ede5da0c67b4 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -191,5 +191,7 @@ int main(int argc, char *argv[])
test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
CLONE3_ARGS_NO_TEST);

- return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
+ if (ksft_get_fail_cnt())
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
index 47a8c0fc3676..dcd9448eaeec 100644
--- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
+++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
@@ -124,5 +124,5 @@ int main(int argc, char **argv)

test_clone3_clear_sighand();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
index 0229e9ebb995..a755fcd3af89 100644
--- a/tools/testing/selftests/clone3/clone3_set_tid.c
+++ b/tools/testing/selftests/clone3/clone3_set_tid.c
@@ -393,5 +393,7 @@ int main(int argc, char *argv[])
out:
ret = 0;

- return !ret ? ksft_exit_pass() : ksft_exit_fail();
+ if (ret)
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
index 656c43c24044..21dd6af76b21 100644
--- a/tools/testing/selftests/ipc/msgque.c
+++ b/tools/testing/selftests/ipc/msgque.c
@@ -198,13 +198,13 @@ int main(int argc, char **argv)
struct msgque_data msgque;

if (getuid() != 0)
- return ksft_exit_skip(
+ ksft_exit_skip(
"Please run the test as root - Exiting.\n");

msgque.key = ftok(argv[0], 822155650);
if (msgque.key == -1) {
printf("Can't make key: %d\n", -errno);
- return ksft_exit_fail();
+ ksft_exit_fail();
}

msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
@@ -243,13 +243,13 @@ int main(int argc, char **argv)
printf("Failed to test queue: %d\n", err);
goto err_out;
}
- return ksft_exit_pass();
+ ksft_exit_pass();

err_destroy:
if (msgctl(msgque.msq_id, IPC_RMID, NULL)) {
printf("Failed to destroy queue: %d\n", -errno);
- return ksft_exit_fail();
+ ksft_exit_fail();
}
err_out:
- return ksft_exit_fail();
+ ksft_exit_fail();
}
diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
index 6ea7b9f37a41..4e0776c044d1 100644
--- a/tools/testing/selftests/kcmp/kcmp_test.c
+++ b/tools/testing/selftests/kcmp/kcmp_test.c
@@ -162,5 +162,5 @@ int main(int argc, char **argv)

waitpid(pid2, &status, P_ALL);

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h
index 8d50483fe204..e47f634bf5c0 100644
--- a/tools/testing/selftests/kselftest.h
+++ b/tools/testing/selftests/kselftest.h
@@ -207,13 +207,13 @@ static inline void ksft_test_result_error(const char *msg, ...)
va_end(args);
}

-static inline int ksft_exit_pass(void)
+static inline void __attribute__((noreturn)) ksft_exit_pass(void)
{
ksft_print_cnts();
exit(KSFT_PASS);
}

-static inline int ksft_exit_fail(void)
+static inline void __attribute__((noreturn)) ksft_exit_fail(void)
{
ksft_print_cnts();
exit(KSFT_FAIL);
@@ -231,7 +231,7 @@ static inline int ksft_exit_fail(void)
ksft_exit_fail(); \
} while (0)

-static inline int ksft_exit_fail_msg(const char *msg, ...)
+static inline void __attribute__((noreturn)) ksft_exit_fail_msg(const char *msg, ...)
{
int saved_errno = errno;
va_list args;
@@ -246,19 +246,19 @@ static inline int ksft_exit_fail_msg(const char *msg, ...)
exit(KSFT_FAIL);
}

-static inline int ksft_exit_xfail(void)
+static inline void __attribute__((noreturn)) ksft_exit_xfail(void)
{
ksft_print_cnts();
exit(KSFT_XFAIL);
}

-static inline int ksft_exit_xpass(void)
+static inline void __attribute__((noreturn)) ksft_exit_xpass(void)
{
ksft_print_cnts();
exit(KSFT_XPASS);
}

-static inline int ksft_exit_skip(const char *msg, ...)
+static inline void __attribute__((noreturn)) ksft_exit_skip(const char *msg, ...)
{
int saved_errno = errno;
va_list args;
diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
index ac5613e5b0eb..b055625e4eb5 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
@@ -69,5 +69,5 @@ int main(int argc, char **argv)
/* Multi-threaded */
test_mt_membarrier();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
index c1c963902854..daec48e0b6f2 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
@@ -20,5 +20,5 @@ int main(int argc, char **argv)

test_membarrier_success();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
index 22558524f71c..d6c5cfd1c4c6 100644
--- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
@@ -292,5 +292,5 @@ int main(int argc, char **argv)
test_pidfd_fdinfo_nspid();
test_pidfd_dead_fdinfo();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
index 8a59438ccc78..c62564c264b1 100644
--- a/tools/testing/selftests/pidfd/pidfd_open_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
@@ -159,5 +159,7 @@ int main(int argc, char **argv)
if (pidfd >= 0)
close(pidfd);

- return !ret ? ksft_exit_pass() : ksft_exit_fail();
+ if (ret)
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
index 610811275357..55d74a50358f 100644
--- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
@@ -112,5 +112,5 @@ int main(int argc, char **argv)
}

ksft_test_result_pass("pidfd poll test: pass\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
index 529eb700ac26..4a4ab7e25796 100644
--- a/tools/testing/selftests/pidfd/pidfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_test.c
@@ -569,5 +569,5 @@ int main(int argc, char **argv)
test_pidfd_send_signal_exited_fail();
test_pidfd_send_signal_recycled_pid_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 973f09a66e1e..e1cf5a73571b 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -205,7 +205,7 @@ int main(int argc, char **argv)
* 2. We execute perf commands
*/
if (geteuid() != 0)
- return ksft_exit_fail_msg("Not running as root, abort testing.\n");
+ ksft_exit_fail_msg("Not running as root, abort testing.\n");

/* Detect AMD vendor */
detect_amd();
@@ -235,7 +235,7 @@ int main(int argc, char **argv)
sprintf(bm_type, "fill_buf");

if (!check_resctrlfs_support())
- return ksft_exit_fail_msg("resctrl FS does not exist\n");
+ ksft_exit_fail_msg("resctrl FS does not exist\n");

filter_dmesg();

@@ -255,5 +255,5 @@ int main(int argc, char **argv)

umount_resctrlfs();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c
index 414a617db993..aec7057696de 100644
--- a/tools/testing/selftests/sync/sync_test.c
+++ b/tools/testing/selftests/sync/sync_test.c
@@ -110,5 +110,5 @@ int main(void)
err, ksft_test_num());

/* need this return to keep gcc happy */
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c
index 54d8d87f36b3..594c59497015 100644
--- a/tools/testing/selftests/timers/adjtick.c
+++ b/tools/testing/selftests/timers/adjtick.c
@@ -205,7 +205,7 @@ int main(int argv, char **argc)
adjtimex(&tx1);

if (err)
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c
index 4da09dbf83ba..9ac0c098b20f 100644
--- a/tools/testing/selftests/timers/alarmtimer-suspend.c
+++ b/tools/testing/selftests/timers/alarmtimer-suspend.c
@@ -173,6 +173,6 @@ int main(void)
timer_delete(tm1);
}
if (final_ret)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/change_skew.c b/tools/testing/selftests/timers/change_skew.c
index c4eab7124990..89c97c8b8e91 100644
--- a/tools/testing/selftests/timers/change_skew.c
+++ b/tools/testing/selftests/timers/change_skew.c
@@ -89,8 +89,8 @@ int main(int argv, char **argc)

if (ret) {
printf("[FAIL]");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
index ef8eb3604595..ba4c7f66959b 100644
--- a/tools/testing/selftests/timers/clocksource-switch.c
+++ b/tools/testing/selftests/timers/clocksource-switch.c
@@ -163,6 +163,6 @@ int main(int argv, char **argc)
change_clocksource(orig_clk);

if (status)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
index 4b76450d78d1..73b636f89fdc 100644
--- a/tools/testing/selftests/timers/freq-step.c
+++ b/tools/testing/selftests/timers/freq-step.c
@@ -257,7 +257,7 @@ int main(int argc, char **argv)
set_frequency(0.0);

if (fails)
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
index 022d3ffe3fbf..71362be52dc8 100644
--- a/tools/testing/selftests/timers/inconsistency-check.c
+++ b/tools/testing/selftests/timers/inconsistency-check.c
@@ -186,8 +186,8 @@ int main(int argc, char *argv[])
if (!clock_gettime(clockid, &ts)) {
printf("Consistent %-30s ", clockstring(clockid));
if (consistency_test(clockid, runtime))
- return ksft_exit_fail();
+ ksft_exit_fail();
}
}
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c
index 23eb398c8140..986abbdb1521 100644
--- a/tools/testing/selftests/timers/leap-a-day.c
+++ b/tools/testing/selftests/timers/leap-a-day.c
@@ -268,7 +268,7 @@ int main(int argc, char **argv)
if (ret < 0) {
printf("Error: Problem setting STA_INS/STA_DEL!: %s\n",
time_state_str(ret));
- return ksft_exit_fail();
+ ksft_exit_fail();
}

/* Validate STA_INS was set */
@@ -277,7 +277,7 @@ int main(int argc, char **argv)
if (tx.status != STA_INS && tx.status != STA_DEL) {
printf("Error: STA_INS/STA_DEL not set!: %s\n",
time_state_str(ret));
- return ksft_exit_fail();
+ ksft_exit_fail();
}

if (tai_time) {
@@ -295,7 +295,7 @@ int main(int argc, char **argv)
se.sigev_value.sival_int = 0;
if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) {
printf("Error: timer_create failed\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
its1.it_value.tv_sec = next_leap;
its1.it_value.tv_nsec = 0;
@@ -366,7 +366,7 @@ int main(int argc, char **argv)
if (error_found) {
printf("Errors observed\n");
clear_time_state();
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("\n");
if ((iterations != -1) && !(--iterations))
@@ -374,5 +374,5 @@ int main(int argc, char **argv)
}

clear_time_state();
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c
index f70802c5dd0d..8fd065eec904 100644
--- a/tools/testing/selftests/timers/leapcrash.c
+++ b/tools/testing/selftests/timers/leapcrash.c
@@ -87,7 +87,7 @@ int main(void)
tv.tv_usec = 0;
if (settimeofday(&tv, NULL)) {
printf("Error: You're likely not running with proper (ie: root) permissions\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
tx.modes = 0;
adjtimex(&tx);
@@ -104,5 +104,5 @@ int main(void)
fflush(stdout);
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c
index 7916cf5cc6ff..f3179a605bba 100644
--- a/tools/testing/selftests/timers/mqueue-lat.c
+++ b/tools/testing/selftests/timers/mqueue-lat.c
@@ -107,8 +107,8 @@ int main(int argc, char **argv)
ret = mqueue_lat_test();
if (ret < 0) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c
index 71b5441c2fd9..40ff3d710d66 100644
--- a/tools/testing/selftests/timers/nanosleep.c
+++ b/tools/testing/selftests/timers/nanosleep.c
@@ -153,7 +153,7 @@ int main(int argc, char **argv)
}
if (ret < 0) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
length *= 100;
}
@@ -161,5 +161,5 @@ int main(int argc, char **argv)
next:
ret = 0;
}
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c
index eb3e79ed7b4a..4c201a06cb94 100644
--- a/tools/testing/selftests/timers/nsleep-lat.c
+++ b/tools/testing/selftests/timers/nsleep-lat.c
@@ -172,9 +172,9 @@ int main(int argc, char **argv)
}
if (ret < 0) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]\n");
}
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c
index 0ba500056e63..337424c5c987 100644
--- a/tools/testing/selftests/timers/posix_timers.c
+++ b/tools/testing/selftests/timers/posix_timers.c
@@ -194,16 +194,16 @@ int main(int argc, char **argv)
printf("based timers if other threads run on the CPU...\n");

if (check_itimer(ITIMER_VIRTUAL) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

if (check_itimer(ITIMER_PROF) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

if (check_itimer(ITIMER_REAL) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

if (check_timer_create(CLOCK_THREAD_CPUTIME_ID) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

/*
* It's unfortunately hard to reliably test a timer expiration
@@ -215,7 +215,7 @@ int main(int argc, char **argv)
* find a better solution.
*/
if (check_timer_create(CLOCK_PROCESS_CPUTIME_ID) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c
index b41d8dd0c40c..b58639a7d19d 100644
--- a/tools/testing/selftests/timers/raw_skew.c
+++ b/tools/testing/selftests/timers/raw_skew.c
@@ -138,11 +138,11 @@ int main(int argv, char **argc)
if (tx1.offset || tx2.offset ||
tx1.freq != tx2.freq || tx1.tick != tx2.tick) {
printf(" [SKIP]\n");
- return ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
+ ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
}
printf(" [FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf(" [OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-2038.c b/tools/testing/selftests/timers/set-2038.c
index 688cfd81b531..f7d978721b9e 100644
--- a/tools/testing/selftests/timers/set-2038.c
+++ b/tools/testing/selftests/timers/set-2038.c
@@ -128,6 +128,6 @@ int main(int argc, char *argv[])
/* restore clock */
settime(start);
if (ret)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c
index 8c4179ee2ca2..5b67462efcd6 100644
--- a/tools/testing/selftests/timers/set-tai.c
+++ b/tools/testing/selftests/timers/set-tai.c
@@ -61,9 +61,9 @@ int main(int argc, char **argv)
ret = get_tai();
if (ret != i) {
printf("[FAILED] expected: %i got %i\n", i, ret);
- return ksft_exit_fail();
+ ksft_exit_fail();
}
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
index 50da45437daa..7ce240c89b21 100644
--- a/tools/testing/selftests/timers/set-timer-lat.c
+++ b/tools/testing/selftests/timers/set-timer-lat.c
@@ -278,6 +278,6 @@ int main(void)
ret |= do_timer_oneshot(clock_id, 0);
}
if (ret)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c
index 62bd33eb16f0..20daaf1782b7 100644
--- a/tools/testing/selftests/timers/set-tz.c
+++ b/tools/testing/selftests/timers/set-tz.c
@@ -102,9 +102,9 @@ int main(int argc, char **argv)
printf("[OK]\n");

set_tz(min, dst);
- return ksft_exit_pass();
+ ksft_exit_pass();

err:
set_tz(min, dst);
- return ksft_exit_fail();
+ ksft_exit_fail();
}
diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c
index 8066be9aff11..bfeaac8d870d 100644
--- a/tools/testing/selftests/timers/skew_consistency.c
+++ b/tools/testing/selftests/timers/skew_consistency.c
@@ -70,8 +70,8 @@ int main(int argv, char **argc)

if (ret) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c
index 80aed4bf06fb..76b38e41d9c7 100644
--- a/tools/testing/selftests/timers/threadtest.c
+++ b/tools/testing/selftests/timers/threadtest.c
@@ -189,5 +189,5 @@ int main(int argc, char **argv)
/* die */
if (ret)
ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c
index 5397de708d3c..48804223eb4d 100644
--- a/tools/testing/selftests/timers/valid-adjtimex.c
+++ b/tools/testing/selftests/timers/valid-adjtimex.c
@@ -321,10 +321,10 @@ int validate_set_offset(void)
int main(int argc, char **argv)
{
if (validate_freq())
- return ksft_exit_fail();
+ ksft_exit_fail();

if (validate_set_offset())
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c
index 3ee0e8275600..5f2f8ad32248 100644
--- a/tools/testing/selftests/vm/madv_populate.c
+++ b/tools/testing/selftests/vm/madv_populate.c
@@ -325,5 +325,5 @@ int main(int argc, char **argv)
if (err)
ksft_exit_fail_msg("%d out of %d tests failed\n",
err, ksft_test_num());
- return ksft_exit_pass();
+ ksft_exit_pass();
}
--
2.33.0

2021-11-03 18:42:04

by Nick Desaulniers

Subject: Re: [PATCHv2] selftests: kselftest.h: mark functions with 'noreturn'

On Wed, Nov 3, 2021 at 2:47 AM Anders Roxell <[email protected]> wrote:
>
> When building kselftests/capabilities the following warning shows up:
>
> clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
> test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:136:9: note: uninitialized use occurs here
> return have_outer_privilege;
> ^~~~~~~~~~~~~~~~~~~~
> test_execve.c:121:9: note: remove the 'if' if its condition is always true
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
> bool have_outer_privilege;
> ^
> = false
>
> Rework so all the ksft_exit_*() functions have attribue
> '__attribute__((noreturn))' so the compiler knows that there wont be
> any return from the function. That said, without
> '__attribute__((noreturn))' the compiler warns about the above issue
> since it thinks that it will get back from the ksft_exit_skip()
> function, which it wont.
> Cleaning up the callers that rely on ksft_exit_*() return code, since
> the functions ksft_exit_*() have never returned anything.
>
> Signed-off-by: Anders Roxell <[email protected]>
> ---
> tools/testing/selftests/clone3/clone3.c | 4 +++-
> .../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
> tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
> tools/testing/selftests/ipc/msgque.c | 10 +++++-----
> tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
> tools/testing/selftests/kselftest.h | 12 ++++++------
> .../membarrier/membarrier_test_multi_thread.c | 2 +-
> .../membarrier/membarrier_test_single_thread.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
> tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
> tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
> tools/testing/selftests/sync/sync_test.c | 2 +-
> tools/testing/selftests/timers/adjtick.c | 4 ++--
> tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
> tools/testing/selftests/timers/change_skew.c | 4 ++--
> tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
> tools/testing/selftests/timers/freq-step.c | 4 ++--
> tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
> tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
> tools/testing/selftests/timers/leapcrash.c | 4 ++--
> tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
> tools/testing/selftests/timers/nanosleep.c | 4 ++--
> tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
> tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
> tools/testing/selftests/timers/raw_skew.c | 6 +++---
> tools/testing/selftests/timers/set-2038.c | 4 ++--
> tools/testing/selftests/timers/set-tai.c | 4 ++--
> tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
> tools/testing/selftests/timers/set-tz.c | 4 ++--
> tools/testing/selftests/timers/skew_consistency.c | 4 ++--
> tools/testing/selftests/timers/threadtest.c | 2 +-
> tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
> tools/testing/selftests/vm/madv_populate.c | 2 +-
> 35 files changed, 80 insertions(+), 74 deletions(-)
>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 42be3b925830..ede5da0c67b4 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -191,5 +191,7 @@ int main(int argc, char *argv[])
> test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
> CLONE3_ARGS_NO_TEST);
>
> - return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
> + if (ksft_get_fail_cnt())
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 47a8c0fc3676..dcd9448eaeec 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -124,5 +124,5 @@ int main(int argc, char **argv)
>
> test_clone3_clear_sighand();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index 0229e9ebb995..a755fcd3af89 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -393,5 +393,7 @@ int main(int argc, char *argv[])
> out:
> ret = 0;
>
> - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> + if (ret)
> + ksft_exit_fail();
> + ksft_exit_pass();

This case is weird (pre-existing-ly) and looks broken. The assignment
to ret should probably occur _before_ the out: label. Honestly, I'd
remove the use of goto from this function and just call either
ksft_exit_pass() or ksft_exit_fail(). Rest of the patch looks good.
Thanks for sending. (I did not check that this is every case of
`return ksft_exit_{pass|fail};`).

Reviewed-by: Nick Desaulniers <[email protected]>

> }
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..21dd6af76b21 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -198,13 +198,13 @@ int main(int argc, char **argv)
> struct msgque_data msgque;
>
> if (getuid() != 0)
> - return ksft_exit_skip(
> + ksft_exit_skip(
> "Please run the test as root - Exiting.\n");
>
> msgque.key = ftok(argv[0], 822155650);
> if (msgque.key == -1) {
> printf("Can't make key: %d\n", -errno);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
> @@ -243,13 +243,13 @@ int main(int argc, char **argv)
> printf("Failed to test queue: %d\n", err);
> goto err_out;
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
>
> err_destroy:
> if (msgctl(msgque.msq_id, IPC_RMID, NULL)) {
> printf("Failed to destroy queue: %d\n", -errno);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> err_out:
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 6ea7b9f37a41..4e0776c044d1 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -162,5 +162,5 @@ int main(int argc, char **argv)
>
> waitpid(pid2, &status, P_ALL);
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h
> index 8d50483fe204..e47f634bf5c0 100644
> --- a/tools/testing/selftests/kselftest.h
> +++ b/tools/testing/selftests/kselftest.h
> @@ -207,13 +207,13 @@ static inline void ksft_test_result_error(const char *msg, ...)
> va_end(args);
> }
>
> -static inline int ksft_exit_pass(void)
> +static inline void __attribute__((noreturn)) ksft_exit_pass(void)
> {
> ksft_print_cnts();
> exit(KSFT_PASS);
> }
>
> -static inline int ksft_exit_fail(void)
> +static inline void __attribute__((noreturn)) ksft_exit_fail(void)
> {
> ksft_print_cnts();
> exit(KSFT_FAIL);
> @@ -231,7 +231,7 @@ static inline int ksft_exit_fail(void)
> ksft_exit_fail(); \
> } while (0)
>
> -static inline int ksft_exit_fail_msg(const char *msg, ...)
> +static inline void __attribute__((noreturn)) ksft_exit_fail_msg(const char *msg, ...)
> {
> int saved_errno = errno;
> va_list args;
> @@ -246,19 +246,19 @@ static inline int ksft_exit_fail_msg(const char *msg, ...)
> exit(KSFT_FAIL);
> }
>
> -static inline int ksft_exit_xfail(void)
> +static inline void __attribute__((noreturn)) ksft_exit_xfail(void)
> {
> ksft_print_cnts();
> exit(KSFT_XFAIL);
> }
>
> -static inline int ksft_exit_xpass(void)
> +static inline void __attribute__((noreturn)) ksft_exit_xpass(void)
> {
> ksft_print_cnts();
> exit(KSFT_XPASS);
> }
>
> -static inline int ksft_exit_skip(const char *msg, ...)
> +static inline void __attribute__((noreturn)) ksft_exit_skip(const char *msg, ...)
> {
> int saved_errno = errno;
> va_list args;
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index ac5613e5b0eb..b055625e4eb5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -69,5 +69,5 @@ int main(int argc, char **argv)
> /* Multi-threaded */
> test_mt_membarrier();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index c1c963902854..daec48e0b6f2 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -20,5 +20,5 @@ int main(int argc, char **argv)
>
> test_membarrier_success();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 22558524f71c..d6c5cfd1c4c6 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -292,5 +292,5 @@ int main(int argc, char **argv)
> test_pidfd_fdinfo_nspid();
> test_pidfd_dead_fdinfo();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..c62564c264b1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -159,5 +159,7 @@ int main(int argc, char **argv)
> if (pidfd >= 0)
> close(pidfd);
>
> - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> + if (ret)
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..55d74a50358f 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -112,5 +112,5 @@ int main(int argc, char **argv)
> }
>
> ksft_test_result_pass("pidfd poll test: pass\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index 529eb700ac26..4a4ab7e25796 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -569,5 +569,5 @@ int main(int argc, char **argv)
> test_pidfd_send_signal_exited_fail();
> test_pidfd_send_signal_recycled_pid_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
> index 973f09a66e1e..e1cf5a73571b 100644
> --- a/tools/testing/selftests/resctrl/resctrl_tests.c
> +++ b/tools/testing/selftests/resctrl/resctrl_tests.c
> @@ -205,7 +205,7 @@ int main(int argc, char **argv)
> * 2. We execute perf commands
> */
> if (geteuid() != 0)
> - return ksft_exit_fail_msg("Not running as root, abort testing.\n");
> + ksft_exit_fail_msg("Not running as root, abort testing.\n");
>
> /* Detect AMD vendor */
> detect_amd();
> @@ -235,7 +235,7 @@ int main(int argc, char **argv)
> sprintf(bm_type, "fill_buf");
>
> if (!check_resctrlfs_support())
> - return ksft_exit_fail_msg("resctrl FS does not exist\n");
> + ksft_exit_fail_msg("resctrl FS does not exist\n");
>
> filter_dmesg();
>
> @@ -255,5 +255,5 @@ int main(int argc, char **argv)
>
> umount_resctrlfs();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c
> index 414a617db993..aec7057696de 100644
> --- a/tools/testing/selftests/sync/sync_test.c
> +++ b/tools/testing/selftests/sync/sync_test.c
> @@ -110,5 +110,5 @@ int main(void)
> err, ksft_test_num());
>
> /* need this return to keep gcc happy */
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c
> index 54d8d87f36b3..594c59497015 100644
> --- a/tools/testing/selftests/timers/adjtick.c
> +++ b/tools/testing/selftests/timers/adjtick.c
> @@ -205,7 +205,7 @@ int main(int argv, char **argc)
> adjtimex(&tx1);
>
> if (err)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c
> index 4da09dbf83ba..9ac0c098b20f 100644
> --- a/tools/testing/selftests/timers/alarmtimer-suspend.c
> +++ b/tools/testing/selftests/timers/alarmtimer-suspend.c
> @@ -173,6 +173,6 @@ int main(void)
> timer_delete(tm1);
> }
> if (final_ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/change_skew.c b/tools/testing/selftests/timers/change_skew.c
> index c4eab7124990..89c97c8b8e91 100644
> --- a/tools/testing/selftests/timers/change_skew.c
> +++ b/tools/testing/selftests/timers/change_skew.c
> @@ -89,8 +89,8 @@ int main(int argv, char **argc)
>
> if (ret) {
> printf("[FAIL]");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
> index ef8eb3604595..ba4c7f66959b 100644
> --- a/tools/testing/selftests/timers/clocksource-switch.c
> +++ b/tools/testing/selftests/timers/clocksource-switch.c
> @@ -163,6 +163,6 @@ int main(int argv, char **argc)
> change_clocksource(orig_clk);
>
> if (status)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
> index 4b76450d78d1..73b636f89fdc 100644
> --- a/tools/testing/selftests/timers/freq-step.c
> +++ b/tools/testing/selftests/timers/freq-step.c
> @@ -257,7 +257,7 @@ int main(int argc, char **argv)
> set_frequency(0.0);
>
> if (fails)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
> index 022d3ffe3fbf..71362be52dc8 100644
> --- a/tools/testing/selftests/timers/inconsistency-check.c
> +++ b/tools/testing/selftests/timers/inconsistency-check.c
> @@ -186,8 +186,8 @@ int main(int argc, char *argv[])
> if (!clock_gettime(clockid, &ts)) {
> printf("Consistent %-30s ", clockstring(clockid));
> if (consistency_test(clockid, runtime))
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c
> index 23eb398c8140..986abbdb1521 100644
> --- a/tools/testing/selftests/timers/leap-a-day.c
> +++ b/tools/testing/selftests/timers/leap-a-day.c
> @@ -268,7 +268,7 @@ int main(int argc, char **argv)
> if (ret < 0) {
> printf("Error: Problem setting STA_INS/STA_DEL!: %s\n",
> time_state_str(ret));
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> /* Validate STA_INS was set */
> @@ -277,7 +277,7 @@ int main(int argc, char **argv)
> if (tx.status != STA_INS && tx.status != STA_DEL) {
> printf("Error: STA_INS/STA_DEL not set!: %s\n",
> time_state_str(ret));
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> if (tai_time) {
> @@ -295,7 +295,7 @@ int main(int argc, char **argv)
> se.sigev_value.sival_int = 0;
> if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) {
> printf("Error: timer_create failed\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> its1.it_value.tv_sec = next_leap;
> its1.it_value.tv_nsec = 0;
> @@ -366,7 +366,7 @@ int main(int argc, char **argv)
> if (error_found) {
> printf("Errors observed\n");
> clear_time_state();
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("\n");
> if ((iterations != -1) && !(--iterations))
> @@ -374,5 +374,5 @@ int main(int argc, char **argv)
> }
>
> clear_time_state();
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c
> index f70802c5dd0d..8fd065eec904 100644
> --- a/tools/testing/selftests/timers/leapcrash.c
> +++ b/tools/testing/selftests/timers/leapcrash.c
> @@ -87,7 +87,7 @@ int main(void)
> tv.tv_usec = 0;
> if (settimeofday(&tv, NULL)) {
> printf("Error: You're likely not running with proper (ie: root) permissions\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> tx.modes = 0;
> adjtimex(&tx);
> @@ -104,5 +104,5 @@ int main(void)
> fflush(stdout);
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c
> index 7916cf5cc6ff..f3179a605bba 100644
> --- a/tools/testing/selftests/timers/mqueue-lat.c
> +++ b/tools/testing/selftests/timers/mqueue-lat.c
> @@ -107,8 +107,8 @@ int main(int argc, char **argv)
> ret = mqueue_lat_test();
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c
> index 71b5441c2fd9..40ff3d710d66 100644
> --- a/tools/testing/selftests/timers/nanosleep.c
> +++ b/tools/testing/selftests/timers/nanosleep.c
> @@ -153,7 +153,7 @@ int main(int argc, char **argv)
> }
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> length *= 100;
> }
> @@ -161,5 +161,5 @@ int main(int argc, char **argv)
> next:
> ret = 0;
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c
> index eb3e79ed7b4a..4c201a06cb94 100644
> --- a/tools/testing/selftests/timers/nsleep-lat.c
> +++ b/tools/testing/selftests/timers/nsleep-lat.c
> @@ -172,9 +172,9 @@ int main(int argc, char **argv)
> }
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c
> index 0ba500056e63..337424c5c987 100644
> --- a/tools/testing/selftests/timers/posix_timers.c
> +++ b/tools/testing/selftests/timers/posix_timers.c
> @@ -194,16 +194,16 @@ int main(int argc, char **argv)
> printf("based timers if other threads run on the CPU...\n");
>
> if (check_itimer(ITIMER_VIRTUAL) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_itimer(ITIMER_PROF) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_itimer(ITIMER_REAL) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_timer_create(CLOCK_THREAD_CPUTIME_ID) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> /*
> * It's unfortunately hard to reliably test a timer expiration
> @@ -215,7 +215,7 @@ int main(int argc, char **argv)
> * find a better solution.
> */
> if (check_timer_create(CLOCK_PROCESS_CPUTIME_ID) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c
> index b41d8dd0c40c..b58639a7d19d 100644
> --- a/tools/testing/selftests/timers/raw_skew.c
> +++ b/tools/testing/selftests/timers/raw_skew.c
> @@ -138,11 +138,11 @@ int main(int argv, char **argc)
> if (tx1.offset || tx2.offset ||
> tx1.freq != tx2.freq || tx1.tick != tx2.tick) {
> printf(" [SKIP]\n");
> - return ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> + ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> }
> printf(" [FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf(" [OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-2038.c b/tools/testing/selftests/timers/set-2038.c
> index 688cfd81b531..f7d978721b9e 100644
> --- a/tools/testing/selftests/timers/set-2038.c
> +++ b/tools/testing/selftests/timers/set-2038.c
> @@ -128,6 +128,6 @@ int main(int argc, char *argv[])
> /* restore clock */
> settime(start);
> if (ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c
> index 8c4179ee2ca2..5b67462efcd6 100644
> --- a/tools/testing/selftests/timers/set-tai.c
> +++ b/tools/testing/selftests/timers/set-tai.c
> @@ -61,9 +61,9 @@ int main(int argc, char **argv)
> ret = get_tai();
> if (ret != i) {
> printf("[FAILED] expected: %i got %i\n", i, ret);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
> index 50da45437daa..7ce240c89b21 100644
> --- a/tools/testing/selftests/timers/set-timer-lat.c
> +++ b/tools/testing/selftests/timers/set-timer-lat.c
> @@ -278,6 +278,6 @@ int main(void)
> ret |= do_timer_oneshot(clock_id, 0);
> }
> if (ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c
> index 62bd33eb16f0..20daaf1782b7 100644
> --- a/tools/testing/selftests/timers/set-tz.c
> +++ b/tools/testing/selftests/timers/set-tz.c
> @@ -102,9 +102,9 @@ int main(int argc, char **argv)
> printf("[OK]\n");
>
> set_tz(min, dst);
> - return ksft_exit_pass();
> + ksft_exit_pass();
>
> err:
> set_tz(min, dst);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c
> index 8066be9aff11..bfeaac8d870d 100644
> --- a/tools/testing/selftests/timers/skew_consistency.c
> +++ b/tools/testing/selftests/timers/skew_consistency.c
> @@ -70,8 +70,8 @@ int main(int argv, char **argc)
>
> if (ret) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c
> index 80aed4bf06fb..76b38e41d9c7 100644
> --- a/tools/testing/selftests/timers/threadtest.c
> +++ b/tools/testing/selftests/timers/threadtest.c
> @@ -189,5 +189,5 @@ int main(int argc, char **argv)
> /* die */
> if (ret)
> ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c
> index 5397de708d3c..48804223eb4d 100644
> --- a/tools/testing/selftests/timers/valid-adjtimex.c
> +++ b/tools/testing/selftests/timers/valid-adjtimex.c
> @@ -321,10 +321,10 @@ int validate_set_offset(void)
> int main(int argc, char **argv)
> {
> if (validate_freq())
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (validate_set_offset())
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c
> index 3ee0e8275600..5f2f8ad32248 100644
> --- a/tools/testing/selftests/vm/madv_populate.c
> +++ b/tools/testing/selftests/vm/madv_populate.c
> @@ -325,5 +325,5 @@ int main(int argc, char **argv)
> if (err)
> ksft_exit_fail_msg("%d out of %d tests failed\n",
> err, ksft_test_num());
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> --
> 2.33.0
>


--
Thanks,
~Nick Desaulniers

2021-11-17 11:02:08

by Anders Roxell

Subject: Re: [PATCHv2] selftests: kselftest.h: mark functions with 'noreturn'

On Wed, 3 Nov 2021 at 19:38, Nick Desaulniers <[email protected]> wrote:
>
> On Wed, Nov 3, 2021 at 2:47 AM Anders Roxell <[email protected]> wrote:
> >
> > When building kselftests/capabilities the following warning shows up:
> >
> > clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
> > test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> > } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > test_execve.c:136:9: note: uninitialized use occurs here
> > return have_outer_privilege;
> > ^~~~~~~~~~~~~~~~~~~~
> > test_execve.c:121:9: note: remove the 'if' if its condition is always true
> > } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
> > bool have_outer_privilege;
> > ^
> > = false
> >
> > Rework so all the ksft_exit_*() functions have attribue
> > '__attribute__((noreturn))' so the compiler knows that there wont be
> > any return from the function. That said, without
> > '__attribute__((noreturn))' the compiler warns about the above issue
> > since it thinks that it will get back from the ksft_exit_skip()
> > function, which it wont.
> > Cleaning up the callers that rely on ksft_exit_*() return code, since
> > the functions ksft_exit_*() have never returned anything.
> >
> > Signed-off-by: Anders Roxell <[email protected]>
> > ---
> > tools/testing/selftests/clone3/clone3.c | 4 +++-
> > .../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
> > tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
> > tools/testing/selftests/ipc/msgque.c | 10 +++++-----
> > tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
> > tools/testing/selftests/kselftest.h | 12 ++++++------
> > .../membarrier/membarrier_test_multi_thread.c | 2 +-
> > .../membarrier/membarrier_test_single_thread.c | 2 +-
> > tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
> > tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
> > tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
> > tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
> > tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
> > tools/testing/selftests/sync/sync_test.c | 2 +-
> > tools/testing/selftests/timers/adjtick.c | 4 ++--
> > tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
> > tools/testing/selftests/timers/change_skew.c | 4 ++--
> > tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
> > tools/testing/selftests/timers/freq-step.c | 4 ++--
> > tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
> > tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
> > tools/testing/selftests/timers/leapcrash.c | 4 ++--
> > tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
> > tools/testing/selftests/timers/nanosleep.c | 4 ++--
> > tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
> > tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
> > tools/testing/selftests/timers/raw_skew.c | 6 +++---
> > tools/testing/selftests/timers/set-2038.c | 4 ++--
> > tools/testing/selftests/timers/set-tai.c | 4 ++--
> > tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
> > tools/testing/selftests/timers/set-tz.c | 4 ++--
> > tools/testing/selftests/timers/skew_consistency.c | 4 ++--
> > tools/testing/selftests/timers/threadtest.c | 2 +-
> > tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
> > tools/testing/selftests/vm/madv_populate.c | 2 +-
> > 35 files changed, 80 insertions(+), 74 deletions(-)
> >
> > diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> > index 42be3b925830..ede5da0c67b4 100644
> > --- a/tools/testing/selftests/clone3/clone3.c
> > +++ b/tools/testing/selftests/clone3/clone3.c
> > @@ -191,5 +191,7 @@ int main(int argc, char *argv[])
> > test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
> > CLONE3_ARGS_NO_TEST);
> >
> > - return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
> > + if (ksft_get_fail_cnt())
> > + ksft_exit_fail();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> > index 47a8c0fc3676..dcd9448eaeec 100644
> > --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> > +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> > @@ -124,5 +124,5 @@ int main(int argc, char **argv)
> >
> > test_clone3_clear_sighand();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> > index 0229e9ebb995..a755fcd3af89 100644
> > --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> > +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> > @@ -393,5 +393,7 @@ int main(int argc, char *argv[])
> > out:
> > ret = 0;
> >
> > - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> > + if (ret)
> > + ksft_exit_fail();
> > + ksft_exit_pass();
>
> This case is weird (pre-existing-ly) and looks broken. The assignment
> to ret should probably occur _before_ the out: label. Honestly, I'd
> remove the use of goto from this function and just call either
> ksft_exit_pass() or ksft_exit_fail().

I can do that in a followup patch.

> Rest of the patch looks good.
> Thanks for sending. (I did not check that this is every case of
> `return ksft_exit_{pass|fail};`).
>
> Reviewed-by: Nick Desaulniers <[email protected]>

Thank you for the review Nick.

Shuah, will you pick up this patch ?

Cheers,
Anders

>
> > }
> > diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> > index 656c43c24044..21dd6af76b21 100644
> > --- a/tools/testing/selftests/ipc/msgque.c
> > +++ b/tools/testing/selftests/ipc/msgque.c
> > @@ -198,13 +198,13 @@ int main(int argc, char **argv)
> > struct msgque_data msgque;
> >
> > if (getuid() != 0)
> > - return ksft_exit_skip(
> > + ksft_exit_skip(
> > "Please run the test as root - Exiting.\n");
> >
> > msgque.key = ftok(argv[0], 822155650);
> > if (msgque.key == -1) {
> > printf("Can't make key: %d\n", -errno);
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> >
> > msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
> > @@ -243,13 +243,13 @@ int main(int argc, char **argv)
> > printf("Failed to test queue: %d\n", err);
> > goto err_out;
> > }
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> >
> > err_destroy:
> > if (msgctl(msgque.msq_id, IPC_RMID, NULL)) {
> > printf("Failed to destroy queue: %d\n", -errno);
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > err_out:
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> > index 6ea7b9f37a41..4e0776c044d1 100644
> > --- a/tools/testing/selftests/kcmp/kcmp_test.c
> > +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> > @@ -162,5 +162,5 @@ int main(int argc, char **argv)
> >
> > waitpid(pid2, &status, P_ALL);
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h
> > index 8d50483fe204..e47f634bf5c0 100644
> > --- a/tools/testing/selftests/kselftest.h
> > +++ b/tools/testing/selftests/kselftest.h
> > @@ -207,13 +207,13 @@ static inline void ksft_test_result_error(const char *msg, ...)
> > va_end(args);
> > }
> >
> > -static inline int ksft_exit_pass(void)
> > +static inline void __attribute__((noreturn)) ksft_exit_pass(void)
> > {
> > ksft_print_cnts();
> > exit(KSFT_PASS);
> > }
> >
> > -static inline int ksft_exit_fail(void)
> > +static inline void __attribute__((noreturn)) ksft_exit_fail(void)
> > {
> > ksft_print_cnts();
> > exit(KSFT_FAIL);
> > @@ -231,7 +231,7 @@ static inline int ksft_exit_fail(void)
> > ksft_exit_fail(); \
> > } while (0)
> >
> > -static inline int ksft_exit_fail_msg(const char *msg, ...)
> > +static inline void __attribute__((noreturn)) ksft_exit_fail_msg(const char *msg, ...)
> > {
> > int saved_errno = errno;
> > va_list args;
> > @@ -246,19 +246,19 @@ static inline int ksft_exit_fail_msg(const char *msg, ...)
> > exit(KSFT_FAIL);
> > }
> >
> > -static inline int ksft_exit_xfail(void)
> > +static inline void __attribute__((noreturn)) ksft_exit_xfail(void)
> > {
> > ksft_print_cnts();
> > exit(KSFT_XFAIL);
> > }
> >
> > -static inline int ksft_exit_xpass(void)
> > +static inline void __attribute__((noreturn)) ksft_exit_xpass(void)
> > {
> > ksft_print_cnts();
> > exit(KSFT_XPASS);
> > }
> >
> > -static inline int ksft_exit_skip(const char *msg, ...)
> > +static inline void __attribute__((noreturn)) ksft_exit_skip(const char *msg, ...)
> > {
> > int saved_errno = errno;
> > va_list args;
> > diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> > index ac5613e5b0eb..b055625e4eb5 100644
> > --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> > +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> > @@ -69,5 +69,5 @@ int main(int argc, char **argv)
> > /* Multi-threaded */
> > test_mt_membarrier();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> > index c1c963902854..daec48e0b6f2 100644
> > --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> > +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> > @@ -20,5 +20,5 @@ int main(int argc, char **argv)
> >
> > test_membarrier_success();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> > index 22558524f71c..d6c5cfd1c4c6 100644
> > --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> > +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> > @@ -292,5 +292,5 @@ int main(int argc, char **argv)
> > test_pidfd_fdinfo_nspid();
> > test_pidfd_dead_fdinfo();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> > index 8a59438ccc78..c62564c264b1 100644
> > --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> > +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> > @@ -159,5 +159,7 @@ int main(int argc, char **argv)
> > if (pidfd >= 0)
> > close(pidfd);
> >
> > - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> > + if (ret)
> > + ksft_exit_fail();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> > index 610811275357..55d74a50358f 100644
> > --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> > +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> > @@ -112,5 +112,5 @@ int main(int argc, char **argv)
> > }
> >
> > ksft_test_result_pass("pidfd poll test: pass\n");
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> > index 529eb700ac26..4a4ab7e25796 100644
> > --- a/tools/testing/selftests/pidfd/pidfd_test.c
> > +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> > @@ -569,5 +569,5 @@ int main(int argc, char **argv)
> > test_pidfd_send_signal_exited_fail();
> > test_pidfd_send_signal_recycled_pid_fail();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
> > index 973f09a66e1e..e1cf5a73571b 100644
> > --- a/tools/testing/selftests/resctrl/resctrl_tests.c
> > +++ b/tools/testing/selftests/resctrl/resctrl_tests.c
> > @@ -205,7 +205,7 @@ int main(int argc, char **argv)
> > * 2. We execute perf commands
> > */
> > if (geteuid() != 0)
> > - return ksft_exit_fail_msg("Not running as root, abort testing.\n");
> > + ksft_exit_fail_msg("Not running as root, abort testing.\n");
> >
> > /* Detect AMD vendor */
> > detect_amd();
> > @@ -235,7 +235,7 @@ int main(int argc, char **argv)
> > sprintf(bm_type, "fill_buf");
> >
> > if (!check_resctrlfs_support())
> > - return ksft_exit_fail_msg("resctrl FS does not exist\n");
> > + ksft_exit_fail_msg("resctrl FS does not exist\n");
> >
> > filter_dmesg();
> >
> > @@ -255,5 +255,5 @@ int main(int argc, char **argv)
> >
> > umount_resctrlfs();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c
> > index 414a617db993..aec7057696de 100644
> > --- a/tools/testing/selftests/sync/sync_test.c
> > +++ b/tools/testing/selftests/sync/sync_test.c
> > @@ -110,5 +110,5 @@ int main(void)
> > err, ksft_test_num());
> >
> > /* need this return to keep gcc happy */
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c
> > index 54d8d87f36b3..594c59497015 100644
> > --- a/tools/testing/selftests/timers/adjtick.c
> > +++ b/tools/testing/selftests/timers/adjtick.c
> > @@ -205,7 +205,7 @@ int main(int argv, char **argc)
> > adjtimex(&tx1);
> >
> > if (err)
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c
> > index 4da09dbf83ba..9ac0c098b20f 100644
> > --- a/tools/testing/selftests/timers/alarmtimer-suspend.c
> > +++ b/tools/testing/selftests/timers/alarmtimer-suspend.c
> > @@ -173,6 +173,6 @@ int main(void)
> > timer_delete(tm1);
> > }
> > if (final_ret)
> > - return ksft_exit_fail();
> > - return ksft_exit_pass();
> > + ksft_exit_fail();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/change_skew.c b/tools/testing/selftests/timers/change_skew.c
> > index c4eab7124990..89c97c8b8e91 100644
> > --- a/tools/testing/selftests/timers/change_skew.c
> > +++ b/tools/testing/selftests/timers/change_skew.c
> > @@ -89,8 +89,8 @@ int main(int argv, char **argc)
> >
> > if (ret) {
> > printf("[FAIL]");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > printf("[OK]");
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
> > index ef8eb3604595..ba4c7f66959b 100644
> > --- a/tools/testing/selftests/timers/clocksource-switch.c
> > +++ b/tools/testing/selftests/timers/clocksource-switch.c
> > @@ -163,6 +163,6 @@ int main(int argv, char **argc)
> > change_clocksource(orig_clk);
> >
> > if (status)
> > - return ksft_exit_fail();
> > - return ksft_exit_pass();
> > + ksft_exit_fail();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
> > index 4b76450d78d1..73b636f89fdc 100644
> > --- a/tools/testing/selftests/timers/freq-step.c
> > +++ b/tools/testing/selftests/timers/freq-step.c
> > @@ -257,7 +257,7 @@ int main(int argc, char **argv)
> > set_frequency(0.0);
> >
> > if (fails)
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
> > index 022d3ffe3fbf..71362be52dc8 100644
> > --- a/tools/testing/selftests/timers/inconsistency-check.c
> > +++ b/tools/testing/selftests/timers/inconsistency-check.c
> > @@ -186,8 +186,8 @@ int main(int argc, char *argv[])
> > if (!clock_gettime(clockid, &ts)) {
> > printf("Consistent %-30s ", clockstring(clockid));
> > if (consistency_test(clockid, runtime))
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > }
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c
> > index 23eb398c8140..986abbdb1521 100644
> > --- a/tools/testing/selftests/timers/leap-a-day.c
> > +++ b/tools/testing/selftests/timers/leap-a-day.c
> > @@ -268,7 +268,7 @@ int main(int argc, char **argv)
> > if (ret < 0) {
> > printf("Error: Problem setting STA_INS/STA_DEL!: %s\n",
> > time_state_str(ret));
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> >
> > /* Validate STA_INS was set */
> > @@ -277,7 +277,7 @@ int main(int argc, char **argv)
> > if (tx.status != STA_INS && tx.status != STA_DEL) {
> > printf("Error: STA_INS/STA_DEL not set!: %s\n",
> > time_state_str(ret));
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> >
> > if (tai_time) {
> > @@ -295,7 +295,7 @@ int main(int argc, char **argv)
> > se.sigev_value.sival_int = 0;
> > if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) {
> > printf("Error: timer_create failed\n");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > its1.it_value.tv_sec = next_leap;
> > its1.it_value.tv_nsec = 0;
> > @@ -366,7 +366,7 @@ int main(int argc, char **argv)
> > if (error_found) {
> > printf("Errors observed\n");
> > clear_time_state();
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > printf("\n");
> > if ((iterations != -1) && !(--iterations))
> > @@ -374,5 +374,5 @@ int main(int argc, char **argv)
> > }
> >
> > clear_time_state();
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c
> > index f70802c5dd0d..8fd065eec904 100644
> > --- a/tools/testing/selftests/timers/leapcrash.c
> > +++ b/tools/testing/selftests/timers/leapcrash.c
> > @@ -87,7 +87,7 @@ int main(void)
> > tv.tv_usec = 0;
> > if (settimeofday(&tv, NULL)) {
> > printf("Error: You're likely not running with proper (ie: root) permissions\n");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > tx.modes = 0;
> > adjtimex(&tx);
> > @@ -104,5 +104,5 @@ int main(void)
> > fflush(stdout);
> > }
> > printf("[OK]\n");
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c
> > index 7916cf5cc6ff..f3179a605bba 100644
> > --- a/tools/testing/selftests/timers/mqueue-lat.c
> > +++ b/tools/testing/selftests/timers/mqueue-lat.c
> > @@ -107,8 +107,8 @@ int main(int argc, char **argv)
> > ret = mqueue_lat_test();
> > if (ret < 0) {
> > printf("[FAILED]\n");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > printf("[OK]\n");
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c
> > index 71b5441c2fd9..40ff3d710d66 100644
> > --- a/tools/testing/selftests/timers/nanosleep.c
> > +++ b/tools/testing/selftests/timers/nanosleep.c
> > @@ -153,7 +153,7 @@ int main(int argc, char **argv)
> > }
> > if (ret < 0) {
> > printf("[FAILED]\n");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > length *= 100;
> > }
> > @@ -161,5 +161,5 @@ int main(int argc, char **argv)
> > next:
> > ret = 0;
> > }
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c
> > index eb3e79ed7b4a..4c201a06cb94 100644
> > --- a/tools/testing/selftests/timers/nsleep-lat.c
> > +++ b/tools/testing/selftests/timers/nsleep-lat.c
> > @@ -172,9 +172,9 @@ int main(int argc, char **argv)
> > }
> > if (ret < 0) {
> > printf("[FAILED]\n");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > printf("[OK]\n");
> > }
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c
> > index 0ba500056e63..337424c5c987 100644
> > --- a/tools/testing/selftests/timers/posix_timers.c
> > +++ b/tools/testing/selftests/timers/posix_timers.c
> > @@ -194,16 +194,16 @@ int main(int argc, char **argv)
> > printf("based timers if other threads run on the CPU...\n");
> >
> > if (check_itimer(ITIMER_VIRTUAL) < 0)
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > if (check_itimer(ITIMER_PROF) < 0)
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > if (check_itimer(ITIMER_REAL) < 0)
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > if (check_timer_create(CLOCK_THREAD_CPUTIME_ID) < 0)
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > /*
> > * It's unfortunately hard to reliably test a timer expiration
> > @@ -215,7 +215,7 @@ int main(int argc, char **argv)
> > * find a better solution.
> > */
> > if (check_timer_create(CLOCK_PROCESS_CPUTIME_ID) < 0)
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c
> > index b41d8dd0c40c..b58639a7d19d 100644
> > --- a/tools/testing/selftests/timers/raw_skew.c
> > +++ b/tools/testing/selftests/timers/raw_skew.c
> > @@ -138,11 +138,11 @@ int main(int argv, char **argc)
> > if (tx1.offset || tx2.offset ||
> > tx1.freq != tx2.freq || tx1.tick != tx2.tick) {
> > printf(" [SKIP]\n");
> > - return ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> > + ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> > }
> > printf(" [FAILED]\n");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > printf(" [OK]\n");
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/set-2038.c b/tools/testing/selftests/timers/set-2038.c
> > index 688cfd81b531..f7d978721b9e 100644
> > --- a/tools/testing/selftests/timers/set-2038.c
> > +++ b/tools/testing/selftests/timers/set-2038.c
> > @@ -128,6 +128,6 @@ int main(int argc, char *argv[])
> > /* restore clock */
> > settime(start);
> > if (ret)
> > - return ksft_exit_fail();
> > - return ksft_exit_pass();
> > + ksft_exit_fail();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c
> > index 8c4179ee2ca2..5b67462efcd6 100644
> > --- a/tools/testing/selftests/timers/set-tai.c
> > +++ b/tools/testing/selftests/timers/set-tai.c
> > @@ -61,9 +61,9 @@ int main(int argc, char **argv)
> > ret = get_tai();
> > if (ret != i) {
> > printf("[FAILED] expected: %i got %i\n", i, ret);
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > }
> > printf("[OK]\n");
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
> > index 50da45437daa..7ce240c89b21 100644
> > --- a/tools/testing/selftests/timers/set-timer-lat.c
> > +++ b/tools/testing/selftests/timers/set-timer-lat.c
> > @@ -278,6 +278,6 @@ int main(void)
> > ret |= do_timer_oneshot(clock_id, 0);
> > }
> > if (ret)
> > - return ksft_exit_fail();
> > - return ksft_exit_pass();
> > + ksft_exit_fail();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c
> > index 62bd33eb16f0..20daaf1782b7 100644
> > --- a/tools/testing/selftests/timers/set-tz.c
> > +++ b/tools/testing/selftests/timers/set-tz.c
> > @@ -102,9 +102,9 @@ int main(int argc, char **argv)
> > printf("[OK]\n");
> >
> > set_tz(min, dst);
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> >
> > err:
> > set_tz(min, dst);
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c
> > index 8066be9aff11..bfeaac8d870d 100644
> > --- a/tools/testing/selftests/timers/skew_consistency.c
> > +++ b/tools/testing/selftests/timers/skew_consistency.c
> > @@ -70,8 +70,8 @@ int main(int argv, char **argc)
> >
> > if (ret) {
> > printf("[FAILED]\n");
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> > }
> > printf("[OK]\n");
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c
> > index 80aed4bf06fb..76b38e41d9c7 100644
> > --- a/tools/testing/selftests/timers/threadtest.c
> > +++ b/tools/testing/selftests/timers/threadtest.c
> > @@ -189,5 +189,5 @@ int main(int argc, char **argv)
> > /* die */
> > if (ret)
> > ksft_exit_fail();
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c
> > index 5397de708d3c..48804223eb4d 100644
> > --- a/tools/testing/selftests/timers/valid-adjtimex.c
> > +++ b/tools/testing/selftests/timers/valid-adjtimex.c
> > @@ -321,10 +321,10 @@ int validate_set_offset(void)
> > int main(int argc, char **argv)
> > {
> > if (validate_freq())
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > if (validate_set_offset())
> > - return ksft_exit_fail();
> > + ksft_exit_fail();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c
> > index 3ee0e8275600..5f2f8ad32248 100644
> > --- a/tools/testing/selftests/vm/madv_populate.c
> > +++ b/tools/testing/selftests/vm/madv_populate.c
> > @@ -325,5 +325,5 @@ int main(int argc, char **argv)
> > if (err)
> > ksft_exit_fail_msg("%d out of %d tests failed\n",
> > err, ksft_test_num());
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > --
> > 2.33.0
> >
>
>
> --
> Thanks,
> ~Nick Desaulniers

2021-11-17 13:40:54

by Shuah Khan

Subject: Re: [PATCHv2] selftests: kselftest.h: mark functions with 'noreturn'

On 11/17/21 4:01 AM, Anders Roxell wrote:
> On Wed, 3 Nov 2021 at 19:38, Nick Desaulniers <[email protected]> wrote:
>>
>> On Wed, Nov 3, 2021 at 2:47 AM Anders Roxell <[email protected]> wrote:
>>>
>>> When building kselftests/capabilities the following warning shows up:
>>>
>>> clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
>>> test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
>>> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
>>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> test_execve.c:136:9: note: uninitialized use occurs here
>>> return have_outer_privilege;
>>> ^~~~~~~~~~~~~~~~~~~~
>>> test_execve.c:121:9: note: remove the 'if' if its condition is always true
>>> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
>>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
>>> bool have_outer_privilege;
>>> ^
>>> = false
>>>
>>> Rework so all the ksft_exit_*() functions have attribue
>>> '__attribute__((noreturn))' so the compiler knows that there wont be
>>> any return from the function. That said, without
>>> '__attribute__((noreturn))' the compiler warns about the above issue
>>> since it thinks that it will get back from the ksft_exit_skip()
>>> function, which it wont.
>>> Cleaning up the callers that rely on ksft_exit_*() return code, since
>>> the functions ksft_exit_*() have never returned anything.
>>>
>>> Signed-off-by: Anders Roxell <[email protected]>
>>> ---
>>> tools/testing/selftests/clone3/clone3.c | 4 +++-
>>> .../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
>>> tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
>>> tools/testing/selftests/ipc/msgque.c | 10 +++++-----
>>> tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
>>> tools/testing/selftests/kselftest.h | 12 ++++++------
>>> .../membarrier/membarrier_test_multi_thread.c | 2 +-
>>> .../membarrier/membarrier_test_single_thread.c | 2 +-
>>> tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
>>> tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
>>> tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
>>> tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
>>> tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
>>> tools/testing/selftests/sync/sync_test.c | 2 +-
>>> tools/testing/selftests/timers/adjtick.c | 4 ++--
>>> tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
>>> tools/testing/selftests/timers/change_skew.c | 4 ++--
>>> tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
>>> tools/testing/selftests/timers/freq-step.c | 4 ++--
>>> tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
>>> tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
>>> tools/testing/selftests/timers/leapcrash.c | 4 ++--
>>> tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
>>> tools/testing/selftests/timers/nanosleep.c | 4 ++--
>>> tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
>>> tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
>>> tools/testing/selftests/timers/raw_skew.c | 6 +++---
>>> tools/testing/selftests/timers/set-2038.c | 4 ++--
>>> tools/testing/selftests/timers/set-tai.c | 4 ++--
>>> tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
>>> tools/testing/selftests/timers/set-tz.c | 4 ++--
>>> tools/testing/selftests/timers/skew_consistency.c | 4 ++--
>>> tools/testing/selftests/timers/threadtest.c | 2 +-
>>> tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
>>> tools/testing/selftests/vm/madv_populate.c | 2 +-
>>> 35 files changed, 80 insertions(+), 74 deletions(-)
>>>
>>> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
>>> index 42be3b925830..ede5da0c67b4 100644
>>> --- a/tools/testing/selftests/clone3/clone3.c
>>> +++ b/tools/testing/selftests/clone3/clone3.c
>>> @@ -191,5 +191,7 @@ int main(int argc, char *argv[])
>>> test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
>>> CLONE3_ARGS_NO_TEST);
>>>
>>> - return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
>>> + if (ksft_get_fail_cnt())
>>> + ksft_exit_fail();
>>> + ksft_exit_pass();
>>> }
>>> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
>>> index 47a8c0fc3676..dcd9448eaeec 100644
>>> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
>>> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
>>> @@ -124,5 +124,5 @@ int main(int argc, char **argv)
>>>
>>> test_clone3_clear_sighand();
>>>
>>> - return ksft_exit_pass();
>>> + ksft_exit_pass();
>>> }
>>> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
>>> index 0229e9ebb995..a755fcd3af89 100644
>>> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
>>> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
>>> @@ -393,5 +393,7 @@ int main(int argc, char *argv[])
>>> out:
>>> ret = 0;
>>>
>>> - return !ret ? ksft_exit_pass() : ksft_exit_fail();
>>> + if (ret)
>>> + ksft_exit_fail();
>>> + ksft_exit_pass();
>>
>> This case is weird (pre-existing-ly) and looks broken. The assignment
>> to ret should probably occur _before_ the out: label. Honestly, I'd
>> remove the use of goto from this function and just call either
>> ksft_exit_pass() or ksft_exit_fail().
>
> I can do that in a followup patch.
>

Let's fold this change in. Please send me v3 with.

thanks,
-- Shuah

2021-11-18 09:59:09

by Anders Roxell

Subject: [PATCH v3 1/2] selftests: kselftest.h: mark functions with 'noreturn'

When building kselftests/capabilities the following warning shows up:

clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
} else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test_execve.c:136:9: note: uninitialized use occurs here
return have_outer_privilege;
^~~~~~~~~~~~~~~~~~~~
test_execve.c:121:9: note: remove the 'if' if its condition is always true
} else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
bool have_outer_privilege;
^
= false

Rework so all the ksft_exit_*() functions have attribue
'__attribute__((noreturn))' so the compiler knows that there wont be
any return from the function. That said, without
'__attribute__((noreturn))' the compiler warns about the above issue
since it thinks that it will get back from the ksft_exit_skip()
function, which it wont.
Cleaning up the callers that rely on ksft_exit_*() return code, since
the functions ksft_exit_*() have never returned anything.

Signed-off-by: Anders Roxell <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
---
tools/testing/selftests/clone3/clone3.c | 4 +++-
.../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
tools/testing/selftests/ipc/msgque.c | 10 +++++-----
tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
tools/testing/selftests/kselftest.h | 12 ++++++------
.../membarrier/membarrier_test_multi_thread.c | 2 +-
.../membarrier/membarrier_test_single_thread.c | 2 +-
tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
tools/testing/selftests/sync/sync_test.c | 2 +-
tools/testing/selftests/timers/adjtick.c | 4 ++--
tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
tools/testing/selftests/timers/change_skew.c | 4 ++--
tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
tools/testing/selftests/timers/freq-step.c | 4 ++--
tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
tools/testing/selftests/timers/leapcrash.c | 4 ++--
tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
tools/testing/selftests/timers/nanosleep.c | 4 ++--
tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
tools/testing/selftests/timers/raw_skew.c | 6 +++---
tools/testing/selftests/timers/set-2038.c | 4 ++--
tools/testing/selftests/timers/set-tai.c | 4 ++--
tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
tools/testing/selftests/timers/set-tz.c | 4 ++--
tools/testing/selftests/timers/skew_consistency.c | 4 ++--
tools/testing/selftests/timers/threadtest.c | 2 +-
tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
tools/testing/selftests/vm/madv_populate.c | 2 +-
35 files changed, 80 insertions(+), 74 deletions(-)

diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
index 42be3b925830..ede5da0c67b4 100644
--- a/tools/testing/selftests/clone3/clone3.c
+++ b/tools/testing/selftests/clone3/clone3.c
@@ -191,5 +191,7 @@ int main(int argc, char *argv[])
test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
CLONE3_ARGS_NO_TEST);

- return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
+ if (ksft_get_fail_cnt())
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
index 47a8c0fc3676..dcd9448eaeec 100644
--- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
+++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
@@ -124,5 +124,5 @@ int main(int argc, char **argv)

test_clone3_clear_sighand();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
index 0229e9ebb995..a755fcd3af89 100644
--- a/tools/testing/selftests/clone3/clone3_set_tid.c
+++ b/tools/testing/selftests/clone3/clone3_set_tid.c
@@ -393,5 +393,7 @@ int main(int argc, char *argv[])
out:
ret = 0;

- return !ret ? ksft_exit_pass() : ksft_exit_fail();
+ if (ret)
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
index 656c43c24044..21dd6af76b21 100644
--- a/tools/testing/selftests/ipc/msgque.c
+++ b/tools/testing/selftests/ipc/msgque.c
@@ -198,13 +198,13 @@ int main(int argc, char **argv)
struct msgque_data msgque;

if (getuid() != 0)
- return ksft_exit_skip(
+ ksft_exit_skip(
"Please run the test as root - Exiting.\n");

msgque.key = ftok(argv[0], 822155650);
if (msgque.key == -1) {
printf("Can't make key: %d\n", -errno);
- return ksft_exit_fail();
+ ksft_exit_fail();
}

msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
@@ -243,13 +243,13 @@ int main(int argc, char **argv)
printf("Failed to test queue: %d\n", err);
goto err_out;
}
- return ksft_exit_pass();
+ ksft_exit_pass();

err_destroy:
if (msgctl(msgque.msq_id, IPC_RMID, NULL)) {
printf("Failed to destroy queue: %d\n", -errno);
- return ksft_exit_fail();
+ ksft_exit_fail();
}
err_out:
- return ksft_exit_fail();
+ ksft_exit_fail();
}
diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
index 6ea7b9f37a41..4e0776c044d1 100644
--- a/tools/testing/selftests/kcmp/kcmp_test.c
+++ b/tools/testing/selftests/kcmp/kcmp_test.c
@@ -162,5 +162,5 @@ int main(int argc, char **argv)

waitpid(pid2, &status, P_ALL);

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h
index 8d50483fe204..e47f634bf5c0 100644
--- a/tools/testing/selftests/kselftest.h
+++ b/tools/testing/selftests/kselftest.h
@@ -207,13 +207,13 @@ static inline void ksft_test_result_error(const char *msg, ...)
va_end(args);
}

-static inline int ksft_exit_pass(void)
+static inline void __attribute__((noreturn)) ksft_exit_pass(void)
{
ksft_print_cnts();
exit(KSFT_PASS);
}

-static inline int ksft_exit_fail(void)
+static inline void __attribute__((noreturn)) ksft_exit_fail(void)
{
ksft_print_cnts();
exit(KSFT_FAIL);
@@ -231,7 +231,7 @@ static inline int ksft_exit_fail(void)
ksft_exit_fail(); \
} while (0)

-static inline int ksft_exit_fail_msg(const char *msg, ...)
+static inline void __attribute__((noreturn)) ksft_exit_fail_msg(const char *msg, ...)
{
int saved_errno = errno;
va_list args;
@@ -246,19 +246,19 @@ static inline int ksft_exit_fail_msg(const char *msg, ...)
exit(KSFT_FAIL);
}

-static inline int ksft_exit_xfail(void)
+static inline void __attribute__((noreturn)) ksft_exit_xfail(void)
{
ksft_print_cnts();
exit(KSFT_XFAIL);
}

-static inline int ksft_exit_xpass(void)
+static inline void __attribute__((noreturn)) ksft_exit_xpass(void)
{
ksft_print_cnts();
exit(KSFT_XPASS);
}

-static inline int ksft_exit_skip(const char *msg, ...)
+static inline void __attribute__((noreturn)) ksft_exit_skip(const char *msg, ...)
{
int saved_errno = errno;
va_list args;
diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
index ac5613e5b0eb..b055625e4eb5 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
@@ -69,5 +69,5 @@ int main(int argc, char **argv)
/* Multi-threaded */
test_mt_membarrier();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
index c1c963902854..daec48e0b6f2 100644
--- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
+++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
@@ -20,5 +20,5 @@ int main(int argc, char **argv)

test_membarrier_success();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
index 22558524f71c..d6c5cfd1c4c6 100644
--- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
@@ -292,5 +292,5 @@ int main(int argc, char **argv)
test_pidfd_fdinfo_nspid();
test_pidfd_dead_fdinfo();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
index 8a59438ccc78..c62564c264b1 100644
--- a/tools/testing/selftests/pidfd/pidfd_open_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
@@ -159,5 +159,7 @@ int main(int argc, char **argv)
if (pidfd >= 0)
close(pidfd);

- return !ret ? ksft_exit_pass() : ksft_exit_fail();
+ if (ret)
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
index 610811275357..55d74a50358f 100644
--- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
@@ -112,5 +112,5 @@ int main(int argc, char **argv)
}

ksft_test_result_pass("pidfd poll test: pass\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
index 529eb700ac26..4a4ab7e25796 100644
--- a/tools/testing/selftests/pidfd/pidfd_test.c
+++ b/tools/testing/selftests/pidfd/pidfd_test.c
@@ -569,5 +569,5 @@ int main(int argc, char **argv)
test_pidfd_send_signal_exited_fail();
test_pidfd_send_signal_recycled_pid_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 973f09a66e1e..e1cf5a73571b 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -205,7 +205,7 @@ int main(int argc, char **argv)
* 2. We execute perf commands
*/
if (geteuid() != 0)
- return ksft_exit_fail_msg("Not running as root, abort testing.\n");
+ ksft_exit_fail_msg("Not running as root, abort testing.\n");

/* Detect AMD vendor */
detect_amd();
@@ -235,7 +235,7 @@ int main(int argc, char **argv)
sprintf(bm_type, "fill_buf");

if (!check_resctrlfs_support())
- return ksft_exit_fail_msg("resctrl FS does not exist\n");
+ ksft_exit_fail_msg("resctrl FS does not exist\n");

filter_dmesg();

@@ -255,5 +255,5 @@ int main(int argc, char **argv)

umount_resctrlfs();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c
index 414a617db993..aec7057696de 100644
--- a/tools/testing/selftests/sync/sync_test.c
+++ b/tools/testing/selftests/sync/sync_test.c
@@ -110,5 +110,5 @@ int main(void)
err, ksft_test_num());

/* need this return to keep gcc happy */
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c
index 54d8d87f36b3..594c59497015 100644
--- a/tools/testing/selftests/timers/adjtick.c
+++ b/tools/testing/selftests/timers/adjtick.c
@@ -205,7 +205,7 @@ int main(int argv, char **argc)
adjtimex(&tx1);

if (err)
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c
index 4da09dbf83ba..9ac0c098b20f 100644
--- a/tools/testing/selftests/timers/alarmtimer-suspend.c
+++ b/tools/testing/selftests/timers/alarmtimer-suspend.c
@@ -173,6 +173,6 @@ int main(void)
timer_delete(tm1);
}
if (final_ret)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/change_skew.c b/tools/testing/selftests/timers/change_skew.c
index c4eab7124990..89c97c8b8e91 100644
--- a/tools/testing/selftests/timers/change_skew.c
+++ b/tools/testing/selftests/timers/change_skew.c
@@ -89,8 +89,8 @@ int main(int argv, char **argc)

if (ret) {
printf("[FAIL]");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
index ef8eb3604595..ba4c7f66959b 100644
--- a/tools/testing/selftests/timers/clocksource-switch.c
+++ b/tools/testing/selftests/timers/clocksource-switch.c
@@ -163,6 +163,6 @@ int main(int argv, char **argc)
change_clocksource(orig_clk);

if (status)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
index 4b76450d78d1..73b636f89fdc 100644
--- a/tools/testing/selftests/timers/freq-step.c
+++ b/tools/testing/selftests/timers/freq-step.c
@@ -257,7 +257,7 @@ int main(int argc, char **argv)
set_frequency(0.0);

if (fails)
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
index 022d3ffe3fbf..71362be52dc8 100644
--- a/tools/testing/selftests/timers/inconsistency-check.c
+++ b/tools/testing/selftests/timers/inconsistency-check.c
@@ -186,8 +186,8 @@ int main(int argc, char *argv[])
if (!clock_gettime(clockid, &ts)) {
printf("Consistent %-30s ", clockstring(clockid));
if (consistency_test(clockid, runtime))
- return ksft_exit_fail();
+ ksft_exit_fail();
}
}
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c
index 23eb398c8140..986abbdb1521 100644
--- a/tools/testing/selftests/timers/leap-a-day.c
+++ b/tools/testing/selftests/timers/leap-a-day.c
@@ -268,7 +268,7 @@ int main(int argc, char **argv)
if (ret < 0) {
printf("Error: Problem setting STA_INS/STA_DEL!: %s\n",
time_state_str(ret));
- return ksft_exit_fail();
+ ksft_exit_fail();
}

/* Validate STA_INS was set */
@@ -277,7 +277,7 @@ int main(int argc, char **argv)
if (tx.status != STA_INS && tx.status != STA_DEL) {
printf("Error: STA_INS/STA_DEL not set!: %s\n",
time_state_str(ret));
- return ksft_exit_fail();
+ ksft_exit_fail();
}

if (tai_time) {
@@ -295,7 +295,7 @@ int main(int argc, char **argv)
se.sigev_value.sival_int = 0;
if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) {
printf("Error: timer_create failed\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
its1.it_value.tv_sec = next_leap;
its1.it_value.tv_nsec = 0;
@@ -366,7 +366,7 @@ int main(int argc, char **argv)
if (error_found) {
printf("Errors observed\n");
clear_time_state();
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("\n");
if ((iterations != -1) && !(--iterations))
@@ -374,5 +374,5 @@ int main(int argc, char **argv)
}

clear_time_state();
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c
index f70802c5dd0d..8fd065eec904 100644
--- a/tools/testing/selftests/timers/leapcrash.c
+++ b/tools/testing/selftests/timers/leapcrash.c
@@ -87,7 +87,7 @@ int main(void)
tv.tv_usec = 0;
if (settimeofday(&tv, NULL)) {
printf("Error: You're likely not running with proper (ie: root) permissions\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
tx.modes = 0;
adjtimex(&tx);
@@ -104,5 +104,5 @@ int main(void)
fflush(stdout);
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c
index 7916cf5cc6ff..f3179a605bba 100644
--- a/tools/testing/selftests/timers/mqueue-lat.c
+++ b/tools/testing/selftests/timers/mqueue-lat.c
@@ -107,8 +107,8 @@ int main(int argc, char **argv)
ret = mqueue_lat_test();
if (ret < 0) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c
index 71b5441c2fd9..40ff3d710d66 100644
--- a/tools/testing/selftests/timers/nanosleep.c
+++ b/tools/testing/selftests/timers/nanosleep.c
@@ -153,7 +153,7 @@ int main(int argc, char **argv)
}
if (ret < 0) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
length *= 100;
}
@@ -161,5 +161,5 @@ int main(int argc, char **argv)
next:
ret = 0;
}
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c
index eb3e79ed7b4a..4c201a06cb94 100644
--- a/tools/testing/selftests/timers/nsleep-lat.c
+++ b/tools/testing/selftests/timers/nsleep-lat.c
@@ -172,9 +172,9 @@ int main(int argc, char **argv)
}
if (ret < 0) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]\n");
}
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c
index 0ba500056e63..337424c5c987 100644
--- a/tools/testing/selftests/timers/posix_timers.c
+++ b/tools/testing/selftests/timers/posix_timers.c
@@ -194,16 +194,16 @@ int main(int argc, char **argv)
printf("based timers if other threads run on the CPU...\n");

if (check_itimer(ITIMER_VIRTUAL) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

if (check_itimer(ITIMER_PROF) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

if (check_itimer(ITIMER_REAL) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

if (check_timer_create(CLOCK_THREAD_CPUTIME_ID) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

/*
* It's unfortunately hard to reliably test a timer expiration
@@ -215,7 +215,7 @@ int main(int argc, char **argv)
* find a better solution.
*/
if (check_timer_create(CLOCK_PROCESS_CPUTIME_ID) < 0)
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c
index b41d8dd0c40c..b58639a7d19d 100644
--- a/tools/testing/selftests/timers/raw_skew.c
+++ b/tools/testing/selftests/timers/raw_skew.c
@@ -138,11 +138,11 @@ int main(int argv, char **argc)
if (tx1.offset || tx2.offset ||
tx1.freq != tx2.freq || tx1.tick != tx2.tick) {
printf(" [SKIP]\n");
- return ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
+ ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
}
printf(" [FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf(" [OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-2038.c b/tools/testing/selftests/timers/set-2038.c
index 688cfd81b531..f7d978721b9e 100644
--- a/tools/testing/selftests/timers/set-2038.c
+++ b/tools/testing/selftests/timers/set-2038.c
@@ -128,6 +128,6 @@ int main(int argc, char *argv[])
/* restore clock */
settime(start);
if (ret)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c
index 8c4179ee2ca2..5b67462efcd6 100644
--- a/tools/testing/selftests/timers/set-tai.c
+++ b/tools/testing/selftests/timers/set-tai.c
@@ -61,9 +61,9 @@ int main(int argc, char **argv)
ret = get_tai();
if (ret != i) {
printf("[FAILED] expected: %i got %i\n", i, ret);
- return ksft_exit_fail();
+ ksft_exit_fail();
}
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
index 50da45437daa..7ce240c89b21 100644
--- a/tools/testing/selftests/timers/set-timer-lat.c
+++ b/tools/testing/selftests/timers/set-timer-lat.c
@@ -278,6 +278,6 @@ int main(void)
ret |= do_timer_oneshot(clock_id, 0);
}
if (ret)
- return ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_fail();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c
index 62bd33eb16f0..20daaf1782b7 100644
--- a/tools/testing/selftests/timers/set-tz.c
+++ b/tools/testing/selftests/timers/set-tz.c
@@ -102,9 +102,9 @@ int main(int argc, char **argv)
printf("[OK]\n");

set_tz(min, dst);
- return ksft_exit_pass();
+ ksft_exit_pass();

err:
set_tz(min, dst);
- return ksft_exit_fail();
+ ksft_exit_fail();
}
diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c
index 8066be9aff11..bfeaac8d870d 100644
--- a/tools/testing/selftests/timers/skew_consistency.c
+++ b/tools/testing/selftests/timers/skew_consistency.c
@@ -70,8 +70,8 @@ int main(int argv, char **argc)

if (ret) {
printf("[FAILED]\n");
- return ksft_exit_fail();
+ ksft_exit_fail();
}
printf("[OK]\n");
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c
index 80aed4bf06fb..76b38e41d9c7 100644
--- a/tools/testing/selftests/timers/threadtest.c
+++ b/tools/testing/selftests/timers/threadtest.c
@@ -189,5 +189,5 @@ int main(int argc, char **argv)
/* die */
if (ret)
ksft_exit_fail();
- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c
index 5397de708d3c..48804223eb4d 100644
--- a/tools/testing/selftests/timers/valid-adjtimex.c
+++ b/tools/testing/selftests/timers/valid-adjtimex.c
@@ -321,10 +321,10 @@ int validate_set_offset(void)
int main(int argc, char **argv)
{
if (validate_freq())
- return ksft_exit_fail();
+ ksft_exit_fail();

if (validate_set_offset())
- return ksft_exit_fail();
+ ksft_exit_fail();

- return ksft_exit_pass();
+ ksft_exit_pass();
}
diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c
index 3ee0e8275600..5f2f8ad32248 100644
--- a/tools/testing/selftests/vm/madv_populate.c
+++ b/tools/testing/selftests/vm/madv_populate.c
@@ -325,5 +325,5 @@ int main(int argc, char **argv)
if (err)
ksft_exit_fail_msg("%d out of %d tests failed\n",
err, ksft_test_num());
- return ksft_exit_pass();
+ ksft_exit_pass();
}
--
2.33.0

2021-11-18 18:40:28

by Nick Desaulniers

Subject: Re: [PATCH v3 1/2] selftests: kselftest.h: mark functions with 'noreturn'

On Thu, Nov 18, 2021 at 1:58 AM Anders Roxell <[email protected]> wrote:
>
> When building kselftests/capabilities the following warning shows up:
>
> clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
> test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:136:9: note: uninitialized use occurs here
> return have_outer_privilege;
> ^~~~~~~~~~~~~~~~~~~~
> test_execve.c:121:9: note: remove the 'if' if its condition is always true
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
> bool have_outer_privilege;
> ^
> = false
>
> Rework so all the ksft_exit_*() functions have attribue
> '__attribute__((noreturn))' so the compiler knows that there wont be
> any return from the function. That said, without
> '__attribute__((noreturn))' the compiler warns about the above issue
> since it thinks that it will get back from the ksft_exit_skip()
> function, which it wont.
> Cleaning up the callers that rely on ksft_exit_*() return code, since
> the functions ksft_exit_*() have never returned anything.
>
> Signed-off-by: Anders Roxell <[email protected]>
> Reviewed-by: Nick Desaulniers <[email protected]>
> ---
> tools/testing/selftests/clone3/clone3.c | 4 +++-
> .../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
> tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
> tools/testing/selftests/ipc/msgque.c | 10 +++++-----
> tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
> tools/testing/selftests/kselftest.h | 12 ++++++------
> .../membarrier/membarrier_test_multi_thread.c | 2 +-
> .../membarrier/membarrier_test_single_thread.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
> tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
> tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
> tools/testing/selftests/sync/sync_test.c | 2 +-
> tools/testing/selftests/timers/adjtick.c | 4 ++--
> tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
> tools/testing/selftests/timers/change_skew.c | 4 ++--
> tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
> tools/testing/selftests/timers/freq-step.c | 4 ++--
> tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
> tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
> tools/testing/selftests/timers/leapcrash.c | 4 ++--
> tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
> tools/testing/selftests/timers/nanosleep.c | 4 ++--
> tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
> tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
> tools/testing/selftests/timers/raw_skew.c | 6 +++---
> tools/testing/selftests/timers/set-2038.c | 4 ++--
> tools/testing/selftests/timers/set-tai.c | 4 ++--
> tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
> tools/testing/selftests/timers/set-tz.c | 4 ++--
> tools/testing/selftests/timers/skew_consistency.c | 4 ++--
> tools/testing/selftests/timers/threadtest.c | 2 +-
> tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
> tools/testing/selftests/vm/madv_populate.c | 2 +-
> 35 files changed, 80 insertions(+), 74 deletions(-)
>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 42be3b925830..ede5da0c67b4 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -191,5 +191,7 @@ int main(int argc, char *argv[])
> test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
> CLONE3_ARGS_NO_TEST);
>
> - return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
> + if (ksft_get_fail_cnt())
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 47a8c0fc3676..dcd9448eaeec 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -124,5 +124,5 @@ int main(int argc, char **argv)
>
> test_clone3_clear_sighand();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index 0229e9ebb995..a755fcd3af89 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -393,5 +393,7 @@ int main(int argc, char *argv[])
> out:
> ret = 0;
>
> - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> + if (ret)
> + ksft_exit_fail();
> + ksft_exit_pass();

err...did you update clone3_set_tid as Shuah requested in v3?
Otherwise what changed from v2 -> v3?

> }
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..21dd6af76b21 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -198,13 +198,13 @@ int main(int argc, char **argv)
> struct msgque_data msgque;
>
> if (getuid() != 0)
> - return ksft_exit_skip(
> + ksft_exit_skip(
> "Please run the test as root - Exiting.\n");
>
> msgque.key = ftok(argv[0], 822155650);
> if (msgque.key == -1) {
> printf("Can't make key: %d\n", -errno);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
> @@ -243,13 +243,13 @@ int main(int argc, char **argv)
> printf("Failed to test queue: %d\n", err);
> goto err_out;
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
>
> err_destroy:
> if (msgctl(msgque.msq_id, IPC_RMID, NULL)) {
> printf("Failed to destroy queue: %d\n", -errno);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> err_out:
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 6ea7b9f37a41..4e0776c044d1 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -162,5 +162,5 @@ int main(int argc, char **argv)
>
> waitpid(pid2, &status, P_ALL);
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h
> index 8d50483fe204..e47f634bf5c0 100644
> --- a/tools/testing/selftests/kselftest.h
> +++ b/tools/testing/selftests/kselftest.h
> @@ -207,13 +207,13 @@ static inline void ksft_test_result_error(const char *msg, ...)
> va_end(args);
> }
>
> -static inline int ksft_exit_pass(void)
> +static inline void __attribute__((noreturn)) ksft_exit_pass(void)
> {
> ksft_print_cnts();
> exit(KSFT_PASS);
> }
>
> -static inline int ksft_exit_fail(void)
> +static inline void __attribute__((noreturn)) ksft_exit_fail(void)
> {
> ksft_print_cnts();
> exit(KSFT_FAIL);
> @@ -231,7 +231,7 @@ static inline int ksft_exit_fail(void)
> ksft_exit_fail(); \
> } while (0)
>
> -static inline int ksft_exit_fail_msg(const char *msg, ...)
> +static inline void __attribute__((noreturn)) ksft_exit_fail_msg(const char *msg, ...)
> {
> int saved_errno = errno;
> va_list args;
> @@ -246,19 +246,19 @@ static inline int ksft_exit_fail_msg(const char *msg, ...)
> exit(KSFT_FAIL);
> }
>
> -static inline int ksft_exit_xfail(void)
> +static inline void __attribute__((noreturn)) ksft_exit_xfail(void)
> {
> ksft_print_cnts();
> exit(KSFT_XFAIL);
> }
>
> -static inline int ksft_exit_xpass(void)
> +static inline void __attribute__((noreturn)) ksft_exit_xpass(void)
> {
> ksft_print_cnts();
> exit(KSFT_XPASS);
> }
>
> -static inline int ksft_exit_skip(const char *msg, ...)
> +static inline void __attribute__((noreturn)) ksft_exit_skip(const char *msg, ...)
> {
> int saved_errno = errno;
> va_list args;
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index ac5613e5b0eb..b055625e4eb5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -69,5 +69,5 @@ int main(int argc, char **argv)
> /* Multi-threaded */
> test_mt_membarrier();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index c1c963902854..daec48e0b6f2 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -20,5 +20,5 @@ int main(int argc, char **argv)
>
> test_membarrier_success();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 22558524f71c..d6c5cfd1c4c6 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -292,5 +292,5 @@ int main(int argc, char **argv)
> test_pidfd_fdinfo_nspid();
> test_pidfd_dead_fdinfo();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..c62564c264b1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -159,5 +159,7 @@ int main(int argc, char **argv)
> if (pidfd >= 0)
> close(pidfd);
>
> - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> + if (ret)
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..55d74a50358f 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -112,5 +112,5 @@ int main(int argc, char **argv)
> }
>
> ksft_test_result_pass("pidfd poll test: pass\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index 529eb700ac26..4a4ab7e25796 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -569,5 +569,5 @@ int main(int argc, char **argv)
> test_pidfd_send_signal_exited_fail();
> test_pidfd_send_signal_recycled_pid_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
> index 973f09a66e1e..e1cf5a73571b 100644
> --- a/tools/testing/selftests/resctrl/resctrl_tests.c
> +++ b/tools/testing/selftests/resctrl/resctrl_tests.c
> @@ -205,7 +205,7 @@ int main(int argc, char **argv)
> * 2. We execute perf commands
> */
> if (geteuid() != 0)
> - return ksft_exit_fail_msg("Not running as root, abort testing.\n");
> + ksft_exit_fail_msg("Not running as root, abort testing.\n");
>
> /* Detect AMD vendor */
> detect_amd();
> @@ -235,7 +235,7 @@ int main(int argc, char **argv)
> sprintf(bm_type, "fill_buf");
>
> if (!check_resctrlfs_support())
> - return ksft_exit_fail_msg("resctrl FS does not exist\n");
> + ksft_exit_fail_msg("resctrl FS does not exist\n");
>
> filter_dmesg();
>
> @@ -255,5 +255,5 @@ int main(int argc, char **argv)
>
> umount_resctrlfs();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c
> index 414a617db993..aec7057696de 100644
> --- a/tools/testing/selftests/sync/sync_test.c
> +++ b/tools/testing/selftests/sync/sync_test.c
> @@ -110,5 +110,5 @@ int main(void)
> err, ksft_test_num());
>
> /* need this return to keep gcc happy */
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c
> index 54d8d87f36b3..594c59497015 100644
> --- a/tools/testing/selftests/timers/adjtick.c
> +++ b/tools/testing/selftests/timers/adjtick.c
> @@ -205,7 +205,7 @@ int main(int argv, char **argc)
> adjtimex(&tx1);
>
> if (err)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c
> index 4da09dbf83ba..9ac0c098b20f 100644
> --- a/tools/testing/selftests/timers/alarmtimer-suspend.c
> +++ b/tools/testing/selftests/timers/alarmtimer-suspend.c
> @@ -173,6 +173,6 @@ int main(void)
> timer_delete(tm1);
> }
> if (final_ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/change_skew.c b/tools/testing/selftests/timers/change_skew.c
> index c4eab7124990..89c97c8b8e91 100644
> --- a/tools/testing/selftests/timers/change_skew.c
> +++ b/tools/testing/selftests/timers/change_skew.c
> @@ -89,8 +89,8 @@ int main(int argv, char **argc)
>
> if (ret) {
> printf("[FAIL]");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
> index ef8eb3604595..ba4c7f66959b 100644
> --- a/tools/testing/selftests/timers/clocksource-switch.c
> +++ b/tools/testing/selftests/timers/clocksource-switch.c
> @@ -163,6 +163,6 @@ int main(int argv, char **argc)
> change_clocksource(orig_clk);
>
> if (status)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
> index 4b76450d78d1..73b636f89fdc 100644
> --- a/tools/testing/selftests/timers/freq-step.c
> +++ b/tools/testing/selftests/timers/freq-step.c
> @@ -257,7 +257,7 @@ int main(int argc, char **argv)
> set_frequency(0.0);
>
> if (fails)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
> index 022d3ffe3fbf..71362be52dc8 100644
> --- a/tools/testing/selftests/timers/inconsistency-check.c
> +++ b/tools/testing/selftests/timers/inconsistency-check.c
> @@ -186,8 +186,8 @@ int main(int argc, char *argv[])
> if (!clock_gettime(clockid, &ts)) {
> printf("Consistent %-30s ", clockstring(clockid));
> if (consistency_test(clockid, runtime))
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c
> index 23eb398c8140..986abbdb1521 100644
> --- a/tools/testing/selftests/timers/leap-a-day.c
> +++ b/tools/testing/selftests/timers/leap-a-day.c
> @@ -268,7 +268,7 @@ int main(int argc, char **argv)
> if (ret < 0) {
> printf("Error: Problem setting STA_INS/STA_DEL!: %s\n",
> time_state_str(ret));
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> /* Validate STA_INS was set */
> @@ -277,7 +277,7 @@ int main(int argc, char **argv)
> if (tx.status != STA_INS && tx.status != STA_DEL) {
> printf("Error: STA_INS/STA_DEL not set!: %s\n",
> time_state_str(ret));
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> if (tai_time) {
> @@ -295,7 +295,7 @@ int main(int argc, char **argv)
> se.sigev_value.sival_int = 0;
> if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) {
> printf("Error: timer_create failed\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> its1.it_value.tv_sec = next_leap;
> its1.it_value.tv_nsec = 0;
> @@ -366,7 +366,7 @@ int main(int argc, char **argv)
> if (error_found) {
> printf("Errors observed\n");
> clear_time_state();
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("\n");
> if ((iterations != -1) && !(--iterations))
> @@ -374,5 +374,5 @@ int main(int argc, char **argv)
> }
>
> clear_time_state();
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c
> index f70802c5dd0d..8fd065eec904 100644
> --- a/tools/testing/selftests/timers/leapcrash.c
> +++ b/tools/testing/selftests/timers/leapcrash.c
> @@ -87,7 +87,7 @@ int main(void)
> tv.tv_usec = 0;
> if (settimeofday(&tv, NULL)) {
> printf("Error: You're likely not running with proper (ie: root) permissions\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> tx.modes = 0;
> adjtimex(&tx);
> @@ -104,5 +104,5 @@ int main(void)
> fflush(stdout);
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c
> index 7916cf5cc6ff..f3179a605bba 100644
> --- a/tools/testing/selftests/timers/mqueue-lat.c
> +++ b/tools/testing/selftests/timers/mqueue-lat.c
> @@ -107,8 +107,8 @@ int main(int argc, char **argv)
> ret = mqueue_lat_test();
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c
> index 71b5441c2fd9..40ff3d710d66 100644
> --- a/tools/testing/selftests/timers/nanosleep.c
> +++ b/tools/testing/selftests/timers/nanosleep.c
> @@ -153,7 +153,7 @@ int main(int argc, char **argv)
> }
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> length *= 100;
> }
> @@ -161,5 +161,5 @@ int main(int argc, char **argv)
> next:
> ret = 0;
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c
> index eb3e79ed7b4a..4c201a06cb94 100644
> --- a/tools/testing/selftests/timers/nsleep-lat.c
> +++ b/tools/testing/selftests/timers/nsleep-lat.c
> @@ -172,9 +172,9 @@ int main(int argc, char **argv)
> }
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c
> index 0ba500056e63..337424c5c987 100644
> --- a/tools/testing/selftests/timers/posix_timers.c
> +++ b/tools/testing/selftests/timers/posix_timers.c
> @@ -194,16 +194,16 @@ int main(int argc, char **argv)
> printf("based timers if other threads run on the CPU...\n");
>
> if (check_itimer(ITIMER_VIRTUAL) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_itimer(ITIMER_PROF) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_itimer(ITIMER_REAL) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_timer_create(CLOCK_THREAD_CPUTIME_ID) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> /*
> * It's unfortunately hard to reliably test a timer expiration
> @@ -215,7 +215,7 @@ int main(int argc, char **argv)
> * find a better solution.
> */
> if (check_timer_create(CLOCK_PROCESS_CPUTIME_ID) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c
> index b41d8dd0c40c..b58639a7d19d 100644
> --- a/tools/testing/selftests/timers/raw_skew.c
> +++ b/tools/testing/selftests/timers/raw_skew.c
> @@ -138,11 +138,11 @@ int main(int argv, char **argc)
> if (tx1.offset || tx2.offset ||
> tx1.freq != tx2.freq || tx1.tick != tx2.tick) {
> printf(" [SKIP]\n");
> - return ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> + ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> }
> printf(" [FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf(" [OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-2038.c b/tools/testing/selftests/timers/set-2038.c
> index 688cfd81b531..f7d978721b9e 100644
> --- a/tools/testing/selftests/timers/set-2038.c
> +++ b/tools/testing/selftests/timers/set-2038.c
> @@ -128,6 +128,6 @@ int main(int argc, char *argv[])
> /* restore clock */
> settime(start);
> if (ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c
> index 8c4179ee2ca2..5b67462efcd6 100644
> --- a/tools/testing/selftests/timers/set-tai.c
> +++ b/tools/testing/selftests/timers/set-tai.c
> @@ -61,9 +61,9 @@ int main(int argc, char **argv)
> ret = get_tai();
> if (ret != i) {
> printf("[FAILED] expected: %i got %i\n", i, ret);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
> index 50da45437daa..7ce240c89b21 100644
> --- a/tools/testing/selftests/timers/set-timer-lat.c
> +++ b/tools/testing/selftests/timers/set-timer-lat.c
> @@ -278,6 +278,6 @@ int main(void)
> ret |= do_timer_oneshot(clock_id, 0);
> }
> if (ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c
> index 62bd33eb16f0..20daaf1782b7 100644
> --- a/tools/testing/selftests/timers/set-tz.c
> +++ b/tools/testing/selftests/timers/set-tz.c
> @@ -102,9 +102,9 @@ int main(int argc, char **argv)
> printf("[OK]\n");
>
> set_tz(min, dst);
> - return ksft_exit_pass();
> + ksft_exit_pass();
>
> err:
> set_tz(min, dst);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c
> index 8066be9aff11..bfeaac8d870d 100644
> --- a/tools/testing/selftests/timers/skew_consistency.c
> +++ b/tools/testing/selftests/timers/skew_consistency.c
> @@ -70,8 +70,8 @@ int main(int argv, char **argc)
>
> if (ret) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c
> index 80aed4bf06fb..76b38e41d9c7 100644
> --- a/tools/testing/selftests/timers/threadtest.c
> +++ b/tools/testing/selftests/timers/threadtest.c
> @@ -189,5 +189,5 @@ int main(int argc, char **argv)
> /* die */
> if (ret)
> ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c
> index 5397de708d3c..48804223eb4d 100644
> --- a/tools/testing/selftests/timers/valid-adjtimex.c
> +++ b/tools/testing/selftests/timers/valid-adjtimex.c
> @@ -321,10 +321,10 @@ int validate_set_offset(void)
> int main(int argc, char **argv)
> {
> if (validate_freq())
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (validate_set_offset())
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c
> index 3ee0e8275600..5f2f8ad32248 100644
> --- a/tools/testing/selftests/vm/madv_populate.c
> +++ b/tools/testing/selftests/vm/madv_populate.c
> @@ -325,5 +325,5 @@ int main(int argc, char **argv)
> if (err)
> ksft_exit_fail_msg("%d out of %d tests failed\n",
> err, ksft_test_num());
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> --
> 2.33.0
>


--
Thanks,
~Nick Desaulniers

2021-11-18 18:41:40

by Nick Desaulniers

Subject: Re: [PATCH v3 1/2] selftests: kselftest.h: mark functions with 'noreturn'

On Thu, Nov 18, 2021 at 10:40 AM Nick Desaulniers
<[email protected]> wrote:
>
> On Thu, Nov 18, 2021 at 1:58 AM Anders Roxell <[email protected]> wrote:
> >
> > When building kselftests/capabilities the following warning shows up:
> >
> > clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
> > test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> > } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > test_execve.c:136:9: note: uninitialized use occurs here
> > return have_outer_privilege;
> > ^~~~~~~~~~~~~~~~~~~~
> > test_execve.c:121:9: note: remove the 'if' if its condition is always true
> > } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
> > bool have_outer_privilege;
> > ^
> > = false
> >
> > Rework so all the ksft_exit_*() functions have attribue
> > '__attribute__((noreturn))' so the compiler knows that there wont be
> > any return from the function. That said, without
> > '__attribute__((noreturn))' the compiler warns about the above issue
> > since it thinks that it will get back from the ksft_exit_skip()
> > function, which it wont.
> > Cleaning up the callers that rely on ksft_exit_*() return code, since
> > the functions ksft_exit_*() have never returned anything.
> >
> > Signed-off-by: Anders Roxell <[email protected]>
> > Reviewed-by: Nick Desaulniers <[email protected]>
> > ---
> > tools/testing/selftests/clone3/clone3.c | 4 +++-
> > .../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
> > tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
> > tools/testing/selftests/ipc/msgque.c | 10 +++++-----
> > tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
> > tools/testing/selftests/kselftest.h | 12 ++++++------
> > .../membarrier/membarrier_test_multi_thread.c | 2 +-
> > .../membarrier/membarrier_test_single_thread.c | 2 +-
> > tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
> > tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
> > tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
> > tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
> > tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
> > tools/testing/selftests/sync/sync_test.c | 2 +-
> > tools/testing/selftests/timers/adjtick.c | 4 ++--
> > tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
> > tools/testing/selftests/timers/change_skew.c | 4 ++--
> > tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
> > tools/testing/selftests/timers/freq-step.c | 4 ++--
> > tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
> > tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
> > tools/testing/selftests/timers/leapcrash.c | 4 ++--
> > tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
> > tools/testing/selftests/timers/nanosleep.c | 4 ++--
> > tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
> > tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
> > tools/testing/selftests/timers/raw_skew.c | 6 +++---
> > tools/testing/selftests/timers/set-2038.c | 4 ++--
> > tools/testing/selftests/timers/set-tai.c | 4 ++--
> > tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
> > tools/testing/selftests/timers/set-tz.c | 4 ++--
> > tools/testing/selftests/timers/skew_consistency.c | 4 ++--
> > tools/testing/selftests/timers/threadtest.c | 2 +-
> > tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
> > tools/testing/selftests/vm/madv_populate.c | 2 +-
> > 35 files changed, 80 insertions(+), 74 deletions(-)
> >
> > diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> > index 42be3b925830..ede5da0c67b4 100644
> > --- a/tools/testing/selftests/clone3/clone3.c
> > +++ b/tools/testing/selftests/clone3/clone3.c
> > @@ -191,5 +191,7 @@ int main(int argc, char *argv[])
> > test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
> > CLONE3_ARGS_NO_TEST);
> >
> > - return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
> > + if (ksft_get_fail_cnt())
> > + ksft_exit_fail();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> > index 47a8c0fc3676..dcd9448eaeec 100644
> > --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> > +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> > @@ -124,5 +124,5 @@ int main(int argc, char **argv)
> >
> > test_clone3_clear_sighand();
> >
> > - return ksft_exit_pass();
> > + ksft_exit_pass();
> > }
> > diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> > index 0229e9ebb995..a755fcd3af89 100644
> > --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> > +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> > @@ -393,5 +393,7 @@ int main(int argc, char *argv[])
> > out:
> > ret = 0;
> >
> > - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> > + if (ret)
> > + ksft_exit_fail();
> > + ksft_exit_pass();
>
> err...did you update clone3_set_tid as Shuah requested in v3?
> Otherwise what changed from v2 -> v3?

Ah, this was part of a series. Sorry I missed that; gmail keeps the
original subject line when --in-reply-to is used even when the subject
changes.

--
Thanks,
~Nick Desaulniers

2021-11-19 23:35:35

by Shuah Khan

Subject: Re: [PATCH v3 1/2] selftests: kselftest.h: mark functions with 'noreturn'

On 11/18/21 2:58 AM, Anders Roxell wrote:
> When building kselftests/capabilities the following warning shows up:
>
> clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
> test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:136:9: note: uninitialized use occurs here
> return have_outer_privilege;
> ^~~~~~~~~~~~~~~~~~~~
> test_execve.c:121:9: note: remove the 'if' if its condition is always true
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
> bool have_outer_privilege;
> ^
> = false
>
> Rework so all the ksft_exit_*() functions have attribue
> '__attribute__((noreturn))' so the compiler knows that there wont be

won't be

> any return from the function. That said, without
> '__attribute__((noreturn))' the compiler warns about the above issue
> since it thinks that it will get back from the ksft_exit_skip()
> function, which it wont.
> Cleaning up the callers that rely on ksft_exit_*() return code, since
> the functions ksft_exit_*() have never returned anything.
>
> Signed-off-by: Anders Roxell <[email protected]>
> Reviewed-by: Nick Desaulniers <[email protected]>
> ---

My commit script failed due to checkpatch warns. Run checkpatchp.l --strict
to find the problems and send me v4

thanks,
-- Shuah