linux-kernel - Re: [PATCH 1/2] selftests/harness: Allow test to configure timeout

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Date:   Thu, 23 May 2019 15:49:37 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Shuah Khan <shuah@...nel.org>,
        Jeffrin Thalakkottoor <jeffrin@...agiritech.edu.in>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rtc@...r.kernel.org
Subject: Re: [PATCH 1/2] selftests/harness: Allow test to configure timeout

On Fri, May 24, 2019 at 12:42:22AM +0200, Alexandre Belloni wrote:
> Commit a745f7af3cbd ("selftests/harness: Add 30 second timeout per test")
> adds an hardcoded 30s timeout to all tests. Unfortunately, rtctest has two
> tests taking up to 60s. Allow for individual tests to define their own
> timeout.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

Ah yes. Very nice; thanks!

Reviewed-by: Kees Cook <keescook@...omium.org>

> ---
>  tools/testing/selftests/kselftest_harness.h | 17 ++++++++++++-----
>  1 file changed, 12 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
> index 941d9391377f..2067c6b0e8a1 100644
> --- a/tools/testing/selftests/kselftest_harness.h
> +++ b/tools/testing/selftests/kselftest_harness.h
> @@ -62,6 +62,7 @@
>  #include <sys/wait.h>
>  #include <unistd.h>
>  
> +#define TEST_TIMEOUT_DEFAULT 30
>  
>  /* Utilities exposed to the test definitions */
>  #ifndef TH_LOG_STREAM
> @@ -169,7 +170,8 @@
>  	static void test_name(struct __test_metadata *_metadata); \
>  	static struct __test_metadata _##test_name##_object = \
>  		{ .name = "global." #test_name, \
> -		  .fn = &test_name, .termsig = _signal }; \
> +		  .fn = &test_name, .termsig = _signal, \
> +		  .timeout = TEST_TIMEOUT_DEFAULT, }; \
>  	static void __attribute__((constructor)) _register_##test_name(void) \
>  	{ \
>  		__register_test(&_##test_name##_object); \
> @@ -280,12 +282,15 @@
>   */
>  /* TODO(wad) register fixtures on dedicated test lists. */
>  #define TEST_F(fixture_name, test_name) \
> -	__TEST_F_IMPL(fixture_name, test_name, -1)
> +	__TEST_F_IMPL(fixture_name, test_name, -1, TEST_TIMEOUT_DEFAULT)
>  
>  #define TEST_F_SIGNAL(fixture_name, test_name, signal) \
> -	__TEST_F_IMPL(fixture_name, test_name, signal)
> +	__TEST_F_IMPL(fixture_name, test_name, signal, TEST_TIMEOUT_DEFAULT)
>  
> -#define __TEST_F_IMPL(fixture_name, test_name, signal) \
> +#define TEST_F_TIMEOUT(fixture_name, test_name, timeout) \
> +	__TEST_F_IMPL(fixture_name, test_name, -1, timeout)
> +
> +#define __TEST_F_IMPL(fixture_name, test_name, signal, tmout) \
>  	static void fixture_name##_##test_name( \
>  		struct __test_metadata *_metadata, \
>  		FIXTURE_DATA(fixture_name) *self); \
> @@ -307,6 +312,7 @@
>  		.name = #fixture_name "." #test_name, \
>  		.fn = &wrapper_##fixture_name##_##test_name, \
>  		.termsig = signal, \
> +		.timeout = tmout, \
>  	 }; \
>  	static void __attribute__((constructor)) \
>  			_register_##fixture_name##_##test_name(void) \
> @@ -632,6 +638,7 @@ struct __test_metadata {
>  	int termsig;
>  	int passed;
>  	int trigger; /* extra handler after the evaluation */
> +	int timeout;
>  	__u8 step;
>  	bool no_print; /* manual trigger when TH_LOG_STREAM is not available */
>  	struct __test_metadata *prev, *next;
> @@ -696,7 +703,7 @@ void __run_test(struct __test_metadata *t)
>  	t->passed = 1;
>  	t->trigger = 0;
>  	printf("[ RUN      ] %s\n", t->name);
> -	alarm(30);
> +	alarm(t->timeout);
>  	child_pid = fork();
>  	if (child_pid < 0) {
>  		printf("ERROR SPAWNING TEST CHILD\n");
> -- 
> 2.21.0
> 

-- 
Kees Cook