tools/testing/selftests/clone3/clone3_selftests.h

Source file repositories/reference/linux-study-clean/tools/testing/selftests/clone3/clone3_selftests.h

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/clone3/clone3_selftests.h
Extension
.h
Size
1434 bytes
Lines
70
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct __clone_args {
	__aligned_u64 flags;
	__aligned_u64 pidfd;
	__aligned_u64 child_tid;
	__aligned_u64 parent_tid;
	__aligned_u64 exit_signal;
	__aligned_u64 stack;
	__aligned_u64 stack_size;
	__aligned_u64 tls;
	__aligned_u64 set_tid;
	__aligned_u64 set_tid_size;
	__aligned_u64 cgroup;
};

static pid_t sys_clone3(struct __clone_args *args, size_t size)
{
	fflush(stdout);
	fflush(stderr);
	return syscall(__NR_clone3, args, size);
}

static inline void test_clone3_supported(void)
{
	pid_t pid;
	struct __clone_args args = {};

	if (__NR_clone3 < 0)
		ksft_exit_skip("clone3() syscall is not supported\n");

	/* Set to something that will always cause EINVAL. */
	args.exit_signal = -1;
	pid = sys_clone3(&args, sizeof(args));
	if (!pid)
		exit(EXIT_SUCCESS);

	if (pid > 0) {
		wait(NULL);
		ksft_exit_fail_msg(
			"Managed to create child process with invalid exit_signal\n");
	}

	if (errno == ENOSYS)
		ksft_exit_skip("clone3() syscall is not supported\n");

	ksft_print_msg("clone3() syscall supported\n");
}

#endif /* _CLONE3_SELFTESTS_H */

Annotation

Implementation Notes