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selftests: add membarrier syscall test

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Add a self test for the membarrier system call.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pranith Kumar 2015-09-11 13:07:42 -07:00 committed by Linus Torvalds
parent 5b25b13ab0
commit b6d9734416
4 changed files with 84 additions and 0 deletions
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1
tools/testing/selftests/Makefile
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@ -6,6 +6,7 @@ TARGETS += firmware
TARGETS += ftrace
TARGETS += futex
TARGETS += kcmp
TARGETS += membarrier
TARGETS += memfd
TARGETS += memory-hotplug
TARGETS += mount

1
tools/testing/selftests/membarrier/.gitignore vendored Normal file
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@ -0,0 +1 @@
membarrier_test

11
tools/testing/selftests/membarrier/Makefile Normal file
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@ -0,0 +1,11 @@
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

71
tools/testing/selftests/membarrier/membarrier_test.c Normal file
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@ -0,0 +1,71 @@
#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();
}