[PATCH for v4.2 2/3] selftests: add membarrier syscall test
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: 2015-05-16 23:48:44
Also in:
lkml
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Linus Torvalds
From: Pranith Kumar <redacted> This patch adds a self test for the membarrier system call. CC: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Pranith Kumar <redacted> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/membarrier/.gitignore | 1 + tools/testing/selftests/membarrier/Makefile | 11 +++ .../testing/selftests/membarrier/membarrier_test.c | 71 ++++++++++++++++++++ 4 files changed, 84 insertions(+), 0 deletions(-) create mode 100644 tools/testing/selftests/membarrier/.gitignore create mode 100644 tools/testing/selftests/membarrier/Makefile create mode 100644 tools/testing/selftests/membarrier/membarrier_test.c
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 95abddc..73824b1 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile@@ -5,6 +5,7 @@ TARGETS += exec TARGETS += firmware TARGETS += ftrace TARGETS += kcmp +TARGETS += membarrier TARGETS += memfd TARGETS += memory-hotplug TARGETS += mount
diff --git a/tools/testing/selftests/membarrier/.gitignore b/tools/testing/selftests/membarrier/.gitignore
new file mode 100644
index 0000000..020c44f4
--- /dev/null
+++ b/tools/testing/selftests/membarrier/.gitignore@@ -0,0 +1 @@ +membarrier_test
diff --git a/tools/testing/selftests/membarrier/Makefile b/tools/testing/selftests/membarrier/Makefile
new file mode 100644
index 0000000..877a503
--- /dev/null
+++ b/tools/testing/selftests/membarrier/Makefile@@ -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
diff --git a/tools/testing/selftests/membarrier/membarrier_test.c b/tools/testing/selftests/membarrier/membarrier_test.c
new file mode 100644
index 0000000..3c9f217
--- /dev/null
+++ b/tools/testing/selftests/membarrier/membarrier_test.c@@ -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(); +}
--
1.7.7.3