Unrelated to this patch: You can build the user header files by running `make headers` in a kernel repository to process the kernel header files. They are generated in <kernel_source>/include/uapi Then run `make -C tools/testing/selftests/prctl` to build the test etc.
On 6/7/23 8:36 PM, Osama Muhammad wrote:
This patch will add the new test, which covers the prctl call PR_SET_NAME command. The test tries to give a name using the PR_SET_NAME call and then confirm it that it changed correctly by using PR_GET_NAME. It also tries to rename it with empty name.In the test PR_GET_NAME is tested by passing null pointer to it and check its behaviour.
Signed-off-by: Osama Muhammad osmtendev@gmail.com
Reviewed-by: Muhammad Usama Anjum usama.anjum@collabora.com Tested-by: Muhammad Usama Anjum usama.anjum@collabora.com
changes since v1: -Used TASK_COMM_LEN instead of using numerical value 16.
tools/testing/selftests/prctl/Makefile | 2 +- .../selftests/prctl/set-process-name.c | 62 +++++++++++++++++++ 2 files changed, 63 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/prctl/set-process-name.c
diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile index c058b81ee..cfc35d29f 100644 --- a/tools/testing/selftests/prctl/Makefile +++ b/tools/testing/selftests/prctl/Makefile @@ -5,7 +5,7 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/) ifeq ($(ARCH),x86) TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \
disable-tsc-test set-anon-vma-name-test
disable-tsc-test set-anon-vma-name-test set-process-name
all: $(TEST_PROGS) include ../lib.mk diff --git a/tools/testing/selftests/prctl/set-process-name.c b/tools/testing/selftests/prctl/set-process-name.c new file mode 100644 index 000000000..3bc5e0e09 --- /dev/null +++ b/tools/testing/selftests/prctl/set-process-name.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0 +/*
- This test covers the PR_SET_NAME functionality of prctl calls
- */
+#include <errno.h> +#include <sys/prctl.h> +#include <string.h>
+#include "../kselftest_harness.h"
+#define CHANGE_NAME "changename" +#define EMPTY_NAME "" +#define TASK_COMM_LEN 16
+int set_name(char *name) +{
- int res;
- res = prctl(PR_SET_NAME, name, NULL, NULL, NULL);
- if (res < 0)
return -errno;
- return res;
+}
+int check_is_name_correct(char *check_name) +{
- char name[TASK_COMM_LEN];
- int res;
- res = prctl(PR_GET_NAME, name, NULL, NULL, NULL);
- if (res < 0)
return -errno;
- return !strcmp(name, check_name);
+}
+int check_null_pointer(char *check_name) +{
- char *name = NULL;
- int res;
- res = prctl(PR_GET_NAME, name, NULL, NULL, NULL);
- return res;
+}
+TEST(rename_process) {
- EXPECT_GE(set_name(CHANGE_NAME), 0);
- EXPECT_TRUE(check_is_name_correct(CHANGE_NAME));
- EXPECT_GE(set_name(EMPTY_NAME), 0);
- EXPECT_TRUE(check_is_name_correct(EMPTY_NAME));
- EXPECT_GE(set_name(CHANGE_NAME), 0);
- EXPECT_LT(check_null_pointer(CHANGE_NAME), 0);
+}
+TEST_HARNESS_MAIN