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Commit 1badac4f authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Thomas Gleixner
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rseq/selftests: Provide basic test 



"basic_test" only asserts that RSEQ works moderately correctly. E.g.
that the CPUID pointer works.

Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Watson <davejwatson@fb.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: linux-kselftest@vger.kernel.org
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Chris Lameter <cl@linux.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Andrew Hunter <ahh@google.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Paul Turner <pjt@google.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ben Maurer <bmaurer@fb.com>
Cc: linux-api@vger.kernel.org
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/20180602124408.8430-14-mathieu.desnoyers@efficios.com
parent 2e155fb7

tools/testing/selftests/rseq/basic_test.c

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+56 −0
Original line number Original line Diff line number Diff line 
// SPDX-License-Identifier: LGPL-2.1

/*

 * Basic test coverage for critical regions and rseq_current_cpu().

 */



#define _GNU_SOURCE

#include <assert.h>

#include <sched.h>

#include <signal.h>

#include <stdio.h>

#include <string.h>

#include <sys/time.h>



#include "rseq.h"



void test_cpu_pointer(void)

{

	cpu_set_t affinity, test_affinity;

	int i;



	sched_getaffinity(0, sizeof(affinity), &affinity);

	CPU_ZERO(&test_affinity);

	for (i = 0; i < CPU_SETSIZE; i++) {

		if (CPU_ISSET(i, &affinity)) {

			CPU_SET(i, &test_affinity);

			sched_setaffinity(0, sizeof(test_affinity),

					&test_affinity);

			assert(sched_getcpu() == i);

			assert(rseq_current_cpu() == i);

			assert(rseq_current_cpu_raw() == i);

			assert(rseq_cpu_start() == i);

			CPU_CLR(i, &test_affinity);

		}

	}

	sched_setaffinity(0, sizeof(affinity), &affinity);

}



int main(int argc, char **argv)

{

	if (rseq_register_current_thread()) {

		fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",

			errno, strerror(errno));

		goto init_thread_error;

	}

	printf("testing current cpu\n");

	test_cpu_pointer();

	if (rseq_unregister_current_thread()) {

		fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",

			errno, strerror(errno));

		goto init_thread_error;

	}

	return 0;



init_thread_error:

	return -1;

}