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Commit b6d97344 authored by Pranith Kumar's avatar Pranith Kumar Committed by Linus Torvalds
Browse files

selftests: add membarrier syscall test 



Add a self test for the membarrier system call.

Signed-off-by: default avatarPranith Kumar <bobby.prani@gmail.com>
Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5b25b13a

tools/testing/selftests/Makefile

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@@ -6,6 +6,7 @@ TARGETS += firmware 
TARGETS += ftrace

TARGETS += ftrace

TARGETS += futex

TARGETS += futex

TARGETS += kcmp

TARGETS += kcmp

TARGETS += membarrier

TARGETS += memfd

TARGETS += memfd

TARGETS += memory-hotplug

TARGETS += memory-hotplug

TARGETS += mount

TARGETS += mount

tools/testing/selftests/membarrier/.gitignore

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membarrier_test

tools/testing/selftests/membarrier/Makefile

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CFLAGS += -g -I../../../../usr/include/



all:

	$(CC) $(CFLAGS) membarrier_test.c -o membarrier_test



TEST_PROGS := membarrier_test



include ../lib.mk



clean:

	$(RM) membarrier_test

tools/testing/selftests/membarrier/membarrier_test.c

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#define _GNU_SOURCE

#define __EXPORTED_HEADERS__



#include <linux/membarrier.h>

#include <asm-generic/unistd.h>

#include <sys/syscall.h>

#include <stdio.h>

#include <errno.h>

#include <string.h>



#include "../kselftest.h"



static int sys_membarrier(int cmd, int flags)

{

	return syscall(__NR_membarrier, cmd, flags);

}



static void test_membarrier_fail(void)

{

	int cmd = -1, flags = 0;



	if (sys_membarrier(cmd, flags) != -1) {

		printf("membarrier: Should fail but passed\n");

		ksft_exit_fail();

	}

}



static void test_membarrier_success(void)

{

	int flags = 0;



	if (sys_membarrier(MEMBARRIER_CMD_SHARED, flags) != 0) {

		printf("membarrier: Executing MEMBARRIER failed, %s\n",

				strerror(errno));

		ksft_exit_fail();

	}



	printf("membarrier: MEMBARRIER_CMD_SHARED success\n");

}



static void test_membarrier(void)

{

	test_membarrier_fail();

	test_membarrier_success();

}



static int test_membarrier_exists(void)

{

	int flags = 0;



	if (sys_membarrier(MEMBARRIER_CMD_QUERY, flags))

		return 0;



	return 1;

}



int main(int argc, char **argv)

{

	printf("membarrier: MEMBARRIER_CMD_QUERY ");

	if (test_membarrier_exists()) {

		printf("syscall implemented\n");

		test_membarrier();

	} else {

		printf("syscall not implemented!\n");

		return ksft_exit_fail();

	}



	printf("membarrier: tests done!\n");



	return ksft_exit_pass();

}