nuttx/libs/libc/libc.csv at bf45e12fdd7b1ac9e3cfdbbd4125e7ff3cdb0d37

mirror of https://github.com/apache/nuttx.git synced 2026-08-18 11:41:51 +08:00

Files

T

Marco Casaroli 70c2ef5911 !sched/arch/libc: Give fork() and vfork() their real, separate semantics.

NuttX implemented fork() and vfork() as the same function.  Both were libc
wrappers around a single up_fork() syscall; vfork() differed only by a
trailing waitpid().  Underneath, the child joined the parent's address
environment -- the same addrenv_join() that pthread_create() uses -- and got
a private copy of the stack.  So the child shared .data, .bss and the heap
with its parent and ran concurrently with it.

That is not fork().  It is vfork()-with-a-private-stack under fork()'s name,
and the history says so: today's fork() is NuttX's old vfork(), renamed in
c33d1c9c97 (2023) without any change of behaviour.  The failure was silent --
a program written against POSIX fork() compiled, ran, and had its child's
writes land in the parent's variables.

Separate them into two primitives, chosen by which function the caller
called rather than by what the hardware happens to be:

  fork()   child gets its own copy of the parent's memory at the same
           virtual addresses; runs concurrently.  Only where an address
           environment can be duplicated -- elsewhere it is not declared at
           all, so calling it is a build error naming the function.
  vfork()  child shares the parent's memory; parent suspended until the
           child _exit()s or exec()s.  Implementable everywhere.

Below libc there is still one syscall.  up_fork() gains a bool saying which
primitive the caller used, since the per-architecture register snapshot is
the same for both, and passes it to nxtask_setup_fork(), which is the single
place the memory semantics are decided.  The argument arrives in the first
argument register and is never touched:  each architecture's snapshot takes
some other call-clobbered register for its scratch, so the flag is simply
still there when the C worker is called.

The vfork() parent suspension moves out of libc into nxtask_start_fork(),
released from nxsched_release_tcb() by nxtask_resume_vfork().  Two things
follow: the parent is resumed at exec(), since exec_swap() has already handed
the child's pid to the loaded program by the time the vfork stub exits, and
vfork() no longer depends on CONFIG_SCHED_WAITPID.

Releasing there requires one fix in nxtask_exit().  It raises rtcb->lockcount
directly rather than through sched_lock() while it tears the TCB down, so the
nxsem_post() that wakes the vfork() parent leaves it queued where a blocked
task collects while pre-emption is off -- g_pendingtasks, or g_readytorun on
SMP -- and the matching raw lockcount-- does not publish it the way
sched_unlock() would, leaving the parent stranded with nothing to move it on.
The fix mirrors sched_unlock() for each case:  nxsched_merge_pending(), or
nxsched_deliver_task() under CONFIG_SMP.  Both are no-ops while pre-emption is
still disabled, and up_exit() re-reads this_task() afterwards, so a change of
the ready-to-run head is honoured.  Without it vfork() deadlocks wherever no
other task happens to call sched_unlock() afterwards -- rv-virt:nsh64 and
rv-virt:pnsh64, where NSH is blocked in waitpid() holding the lock, and
qemu-armv8a:citest_smp, which hangs the moment the vfork() test runs.

fork() is built on a new addrenv_fork(), backed by an up_addrenv_fork() hook
that duplicates an address environment into freshly allocated pages mapped at
the same virtual addresses -- unlike up_addrenv_clone(), which copies only
the representation and leaves both pointing at the same page tables.  The
child then adopts the parent's stack geometry rather than being given a
relocated copy: a pointer to a stack local taken before fork() must name the
same object in the child that it named in the parent, and the parent's stack
is already in the duplicate, with its contents, at the parent's address.

No architecture implements up_addrenv_fork() yet, so this commit leaves
fork() unavailable everywhere.  That is the intended state.  It withdraws
fork() from ARCH_ARM, flat ARCH_ARM64, ARCH_RISCV, ARCH_SIM and ARCH_X86_64,
where until now it named the sharing primitive; per-architecture patches
restore it, with POSIX semantics, as up_addrenv_fork() lands.  In the
meantime the sharing primitive is still there under the name that describes
it: vfork() for a child that runs a program, pthread_create() for a second
flow of control that shares memory, posix_spawn() for both at once.

Kconfig: ARCH_HAVE_VFORK inherits ARCH_HAVE_FORK's select lines, conditions
included, so no configuration gains machinery; ARCH_HAVE_FORK is redefined to
mean "can provide POSIX fork() semantics" and now depends on ARCH_ADDRENV.

There is one deliberate departure from "verbatim".  ARCH_ARM selected the
fork family unconditionally, BUILD_KERNEL included, and that has never
worked:  on a kernel build the architecture's fork entry point sees the
kernel's return address and stack pointer rather than the caller's, so the
child resumes at a kernel address.  On qemu-armv7a:knsh master faults in
ostest's fork case with "Child did not run" and then a data abort; without
the condition this change faults the same way through vfork().  ARCH_ARM64
and ARCH_X86_64 already carried "if !BUILD_KERNEL" for exactly this reason --
ARM was the outlier.  Conditioning it turns a runtime fault into an honest
absence, which is the whole point of the change; arch/arm takes the condition
off again in the patch that adds its saved-syscall-frame path.  Only the
MMU-capable ARM ports are affected, since Cortex-M cannot build BUILD_KERNEL
at all.

Also fixes two latent syntax errors found on the way: a missing comma in
riscv_fork.c and mips_fork.c, both in *_FRAMEPOINTER && !SAVE_GP branches
that are never compiled today.

BREAKING CHANGE: fork() is withdrawn from every architecture.  It is no
longer declared in unistd.h, so code that calls it fails to build with an error
naming the function, and the sharing behaviour it used to have is gone rather
than renamed.  CONFIG_ARCH_HAVE_FORK no longer means "fork() exists"; it means
"this configuration can provide POSIX fork() semantics", and no architecture
selects it yet.

Quick fix, chosen by why the call was made:

  to run a program                vfork() + exec*(), or better posix_spawn()
  a second flow of control that   pthread_create()
  shares the caller's memory
  a genuinely independent copy    keep fork(), and wait for the per-arch patch
  of the process                  that implements up_addrenv_fork() and selects
                                  CONFIG_ARCH_HAVE_FORK

Out-of-tree code that tests CONFIG_ARCH_HAVE_FORK to decide whether a
fork-then-exec path is available wants CONFIG_ARCH_HAVE_VFORK instead, which is
selected in exactly the places CONFIG_ARCH_HAVE_FORK used to be.  The full
migration guide is Documentation/guides/fork_vfork_migration.rst.

Assisted-by: Claude Code:claude-opus-5
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>

2026-08-10 08:57:30 -03:00

30 KiB

Raw Blame History

1	__assert	assert.h		void	FAR const char *	int	FAR const char *
2	__cxa_atexit	stdlib.h		int	FAR CODE void ()(FAR void )\|FAR void *	FAR void *	FAR void *
3	__errno	errno.h	defined(CONFIG_BUILD_FLAT)	FAR int *
4	__stack_chk_fail	ssp/ssp.h	defined(CONFIG_STACK_CANARIES)	void	void
5	_alert	debug.h	!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG_ERROR)	void	FAR const char *	...
6	_err	debug.h	!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG_ERROR)	void	FAR const char *	...
7	_exit	unistd.h		void	int
8	_info	debug.h	!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG_INFO)	void	FAR const char *	...
9	_warn	debug.h	!defined(CONFIG_CPP_HAVE_VARARGS) && defined(CONFIG_DEBUG_WARN)	void	FAR const char *	...
10	abort	stdlib.h		void
11	abs	stdlib.h		int	int
12	aio_error	aio.h	defined(CONFIG_FS_AIO)	int	FAR struct aiocb *
13	aio_return	aio.h	defined(CONFIG_FS_AIO)	ssize_t	FAR struct aiocb *
14	aio_suspend	aio.h	defined(CONFIG_FS_AIO)	int	FAR const struct aiocb * const []\|FAR const struct aiocb * const *	int	FAR const struct timespec *
15	alarm	unistd.h	!defined(CONFIG_DISABLE_POSIX_TIMERS)	unsigned int	unsigned int
16	alphasort	dirent.h		int	FAR const struct dirent **	FAR const struct dirent **
17	arc4random	stdlib.h		uint32_t
18	arc4random_buf	stdlib.h		void	FAR void *	size_t
19	asprintf	stdio.h		int	FAR char **	FAR const IPTR char *	...
20	atof	stdlib.h	defined(CONFIG_HAVE_DOUBLE)	double	FAR const char *
21	atoi	stdlib.h		int	FAR const char *
22	atol	stdlib.h		long	FAR const char *
23	atoll	stdlib.h		long long	FAR const char *
24	b16cos	fixedmath.h		b16_t	b16_t
25	b16sin	fixedmath.h		b16_t	b16_t
26	basename	libgen.h		FAR char *	FAR char *
27	bind_textdomain_codeset	libintl.h	defined(CONFIG_LIBC_LOCALE_GETTEXT)	FAR char *	FAR const char *	FAR const char *
28	bindtextdomain	libintl.h	defined(CONFIG_LIBC_LOCALE_GETTEXT)	FAR char *	FAR const char *	FAR const char *
29	bsearch	stdlib.h		FAR void *	FAR const void *	FAR const void *	size_t	size_t	FAR void *
30	btowc	wchar.h		wint_t	int
31	calloc	stdlib.h		FAR void *	size_t	size_t
32	cfgetspeed	termios.h		speed_t	FAR const struct termios *
33	cfsetspeed	termios.h		int	FAR struct termios *	speed_t
34	chdir	unistd.h	!defined(CONFIG_DISABLE_ENVIRON)	int	FAR const char *
35	clock_getcpuclockid	time.h		int	pid_t	FAR clockid_t *
36	clock_getres	time.h		int	clockid_t	FAR struct timespec *
37	closedir	dirent.h		int	DIR *
38	crc32	nuttx/crc32.h		uint32_t	FAR const uint8_t *	size_t
39	crc32part	nuttx/crc32.h		uint32_t	FAR const uint8_t *	size_t	uint32_t
40	ctime	time.h		char *	const time_t *
41	crypt	unistd.h	defined(CONFIG_CRYPTO)	FAR const char *	FAR const char *
42	crypt_r	unistd.h	defined(CONFIG_CRYPTO)	FAR const char *	FAR const char *	FAR char *
43	daemon	unistd.h		int	int	int
44	dgettext	libintl.h	defined(CONFIG_LIBC_LOCALE_GETTEXT)	FAR char *	FAR const char *	FAR const char *
45	dirname	libgen.h		FAR char *	FAR char *
46	dlclose	dlfcn.h	defined(CONFIG_LIBC_DLFCN)	int	FAR void *
47	dlerror	dlfcn.h	defined(CONFIG_LIBC_DLFCN)	FAR char *
48	dlopen	dlfcn.h	defined(CONFIG_LIBC_DLFCN)	FAR void *	FAR const char *	int
49	dlsym	dlfcn.h	defined(CONFIG_LIBC_DLFCN)	FAR void *	FAR void *	FAR const char *
50	dlsymtab	dlfcn.h	defined(CONFIG_LIBC_DLFCN)	int	FAR const struct symtab_s *	int
51	dq_addafter	nuttx/queue.h		void	FAR dq_entry_t *	FAR dq_entry_t *	FAR dq_queue_t *
52	dq_remfirst	nuttx/queue.h		FAR dq_entry_t *	FAR dq_queue_t *
53	dq_remlast	nuttx/queue.h		FAR dq_entry_t *	FAR dq_queue_t *
54	ether_ntoa	netinet/ether.h		FAR char *	FAR const struct ether_addr *
55	execv	unistd.h	defined(CONFIG_LIBC_EXECFUNCS)	int	FAR const char *	FAR char const[]\|FAR char const *
56	exit	stdlib.h		noreturn	int
57	fchdir	unistd.h	!defined(CONFIG_DISABLE_ENVIRON)	int	int
58	fclose	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *
59	fdopen	stdio.h	defined(CONFIG_FILE_STREAM)	FAR FILE *	int	FAR const char *
60	feof	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *
61	ferror	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *
62	fflush	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *
63	ffs	strings.h		int	int
64	fgetc	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *
65	fgetpos	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *	FAR fpos_t *
66	fgets	stdio.h	defined(CONFIG_FILE_STREAM)	FAR char *	FAR char *	int	FAR FILE *
67	fgetwc	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	FAR FILE *
68	fgetwc_unlocked	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	FAR FILE *
69	fileno	stdio.h		int	FAR FILE *
70	flockfile	stdio.h	!defined(CONFIG_FILE_STREAM)	void	FAR FILE *
71	fnmatch	fnmatch.h		int	FAR const char *	FAR const char *	int
72	fopen	stdio.h	defined(CONFIG_FILE_STREAM)	FAR FILE *	FAR const char *	FAR const char *
73	fork	unistd.h	!defined(CONFIG_BUILD_KERNEL) && defined(CONFIG_ARCH_HAVE_FORK)	pid_t
74	fprintf	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *	FAR const IPTR char *	...
75	fputc	stdio.h	defined(CONFIG_FILE_STREAM)	int	int	FAR FILE *
76	fputs	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR const IPTR char *	FAR FILE *
77	fputwc	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	wchar_t	FAR FILE *
78	fputwc_unlocked	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	wchar_t	FAR FILE *
79	fputws	wchar.h	defined(CONFIG_FILE_STREAM)	int	FAR const wchar_t *	FAR FILE *
80	fputws_unlocked	wchar.h	defined(CONFIG_FILE_STREAM)	int	FAR const wchar_t *	FAR FILE *
81	fread	stdio.h	defined(CONFIG_FILE_STREAM)	size_t	FAR void *	size_t	size_t	FAR FILE *
82	free	stdlib.h		void	FAR void *
83	freeaddrinfo	netdb.h	defined(CONFIG_LIBC_NETDB)	void	FAR struct addrinfo *
84	fscanf	stdio.h		int	FAR FILE *	FAR const char *	...
85	fseek	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *	long int	int
86	fsetpos	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *	FAR fpos_t *
87	fstatvfs	sys/statvfs.h		int	int	FAR struct statvfs *
88	ftell	stdio.h	defined(CONFIG_FILE_STREAM)	long	FAR FILE *
89	ftrylockfile	stdio.h	!defined(CONFIG_FILE_STREAM)	int	FAR FILE *
90	funlockfile	stdio.h	!defined(CONFIG_FILE_STREAM)	void	FAR FILE *
91	fwrite	stdio.h	defined(CONFIG_FILE_STREAM)	size_t	FAR const void *	size_t	size_t	FAR FILE *
92	gai_strerror	netdb.h	defined(CONFIG_LIBC_NETDB)	FAR const char *	int
93	getaddrinfo	netdb.h	defined(CONFIG_LIBC_NETDB)	int	FAR const char *	FAR const char *	FAR const struct addrinfo *	FAR struct addrinfo **
94	getc	stdio.h		int	FAR FILE *
95	getcwd	unistd.h	!defined(CONFIG_DISABLE_ENVIRON)	FAR char *	FAR char *	size_t
96	get_current_dir_name	unistd.h	!defined(CONFIG_DISABLE_ENVIRON)	FAR char *	void
97	getegid	unistd.h		gid_t
98	geteuid	unistd.h		uid_t
99	gethostbyname	netdb.h	defined(CONFIG_LIBC_NETDB)	FAR struct hostent *	FAR const char *
100	gethostbyname2	netdb.h	defined(CONFIG_LIBC_NETDB)	FAR struct hostent *	FAR const char *	int
101	gethostname	unistd.h		int	FAR char *	size_t
102	getnameinfo	netdb.h	defined(CONFIG_LIBC_NETDB)	int	FAR const struct sockaddr *	socklen_t	FAR char *	socklen_t	FAR char *	socklen_t	int
103	getopt	unistd.h		int	int	FAR char * const []\|FAR char * const *	FAR const char *
104	getoptargp	unistd.h		FAR char **
105	getopterrp	unistd.h		FAR int *
106	getoptindp	unistd.h		FAR int *
107	getoptoptp	unistd.h		FAR int *
108	getpriority	sys/resource.h		int	int	id_t
109	getpass	unistd.h		FAR const char *	FAR char *
110	getpwnam_r	pwd.h		int	FAR const char *	FAR struct passwd *	FAR char *	size_t	FAR struct passwd **
111	getpwuid_r	pwd.h		int	uid_t	FAR struct passwd *	FAR char *	size_t	FAR struct passwd **
112	getrandom	sys/random.h	!defined(CONFIG_BUILD_KERNEL)	ssize_t	FAR void *	size_t	unsigned int
113	gets	stdio.h	defined(CONFIG_FILE_STREAM)	FAR char *	FAR char *
114	gettext	libintl.h	defined(CONFIG_LIBC_LOCALE_GETTEXT)	FAR char *	FAR const char *
115	gettimeofday	sys/time.h		int	FAR struct timeval *	FAR struct timezone *
116	getwc	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	FAR FILE *
117	gmtime	time.h		FAR struct tm *	FAR const time_t *
118	gmtime_r	time.h		FAR struct tm *	FAR const time_t *	FAR struct tm *
119	htonl	arpa/inet.h		uint32_t	uint32_t
120	htonq	arpa/inet.h		uint64_t	uint64_t
121	htons	arpa/inet.h		uint16_t	uint16_t
122	iconv	iconv.h	defined(CONFIG_LIBC_LOCALE)	size_t	iconv_t	FAR char **	FAR size_t *	FAR char **	FAR size_t *
123	iconv_close	iconv.h	defined(CONFIG_LIBC_LOCALE)	int	iconv_t
124	iconv_open	iconv.h	defined(CONFIG_LIBC_LOCALE)	iconv_t	FAR const char *	FAR const char *
125	imaxabs	inttypes.h		intmax_t	intmax_t
126	inet_addr	arpa/inet.h		in_addr_t	FAR const char *
127	inet_ntoa	arpa/inet.h	defined(CONFIG_NET_IPv4)	FAR char *	struct in_addr
128	inet_ntop	arpa/inet.h		FAR const char	int	FAR const void *	FAR char *	socklen_t
129	inet_pton	arpa/inet.h		int	int	FAR const char *	FAR void *
130	isalnum	ctype.h		int	int
131	isalpha	ctype.h		int	int
132	isascii	ctype.h		int	int
133	isatty	unistd.h		int	int
134	isblank	ctype.h		int	int
135	iscntrl	ctype.h		int	int
136	isdigit	ctype.h		int	int
137	isgraph	ctype.h		int	int
138	islower	ctype.h		int	int
139	isprint	ctype.h		int	int
140	ispunct	ctype.h		int	int
141	isspace	ctype.h		int	int
142	isupper	ctype.h		int	int
143	iswalnum	wctype.h		int	wint_t
144	iswalpha	wctype.h		int	wint_t
145	iswblank	wctype.h		int	wint_t
146	iswcntrl	wctype.h		int	wint_t
147	iswctype	wctype.h		int	wint_t	wctype_t
148	iswdigit	wctype.h		int	wint_t
149	iswgraph	wctype.h		int	wint_t
150	iswlower	wctype.h		int	wint_t
151	iswprint	wctype.h		int	wint_t
152	iswpunct	wctype.h		int	wint_t
153	iswspace	wctype.h		int	wint_t
154	iswupper	wctype.h		int	wint_t
155	iswxdigit	wctype.h		int	wint_t
156	isxdigit	ctype.h		int	int
157	labs	stdlib.h		long int	long int
158	lib_dumpbuffer	debug.h		void	FAR const char *	FAR const uint8_t *	unsigned int
159	lib_get_stream	nuttx/tls.h		FAR struct file_struct *	int
160	lio_listio	aio.h	defined(CONFIG_FS_AIO)	int	int	FAR struct aiocb * const []\|FAR struct aiocb * const *	int	FAR struct sigevent *
161	llabs	stdlib.h		long long int	long long int
162	localtime	time.h		struct tm *	const time_t *
163	localtime_r	time.h		FAR struct tm *	FAR const time_t *	FAR struct tm *
164	mallinfo	malloc.h		struct mallinfo	void
165	malloc	stdlib.h		FAR void *	size_t
166	malloc_size	malloc.h		size_t	FAR void *
167	mblen	stdlib.h		int	FAR const char *	size_t
168	mbrlen	wchar.h		size_t	FAR const char *	size_t	FAR mbstate_t *
169	mbrtowc	wchar.h		size_t	FAR wchar_t *	FAR const char *	size_t	FAR mbstate_t *
170	mbsnrtowcs	wchar.h		size_t	FAR wchar_t *	FAR const char **	size_t	size_t	FAR mbstate_t *
171	mbsrtowcs	wchar.h		size_t	FAR wchar_t *	FAR const char **	size_t	FAR mbstate_t *
172	mbstowcs	stdlib.h		size_t	FAR wchar_t *	FAR const char *	size_t
173	mbtowc	stdlib.h		int	FAR wchar_t *	FAR const char *	size_t
174	memccpy	string.h		FAR void *	FAR void *	FAR const void *	int	size_t
175	memchr	string.h		FAR void *	FAR const void *	int	size_t
176	memcmp	string.h		int	FAR const void *	FAR const void *	size_t
177	memcpy	string.h		FAR void *	FAR void *	FAR const void *	size_t
178	memmove	string.h		FAR void *	FAR void *	FAR const void *	size_t
179	memset	string.h		FAR void *	FAR void *	int	size_t
180	mkdtemp	stdlib.h		FAR char *	FAR char *
181	mkfifo	sys/stat.h	defined(CONFIG_PIPES) && CONFIG_DEV_FIFO_SIZE > 0	int	FAR const char *	mode_t
182	mkstemp	stdlib.h		int	FAR char *
183	mktemp	stdlib.h		FAR char *	FAR char *
184	mktime	time.h		time_t	FAR struct tm *
185	nice	unistd.h		int	int
186	ntohl	arpa/inet.h		uint32_t	uint32_t
187	ntohq	arpa/inet.h		uint64_t	uint64_t
188	ntohs	arpa/inet.h		uint16_t	uint16_t
189	opendir	dirent.h		FAR DIR *	FAR const char *
190	perror	stdio.h	defined(CONFIG_FILE_STREAM)	void	FAR const char *
191	pipe	unistd.h	defined(CONFIG_PIPES) && CONFIG_DEV_PIPE_SIZE > 0	int	int [2]\|FAR int *
192	posix_fallocate	fcntl.h		int	int	off_t	off_t
193	posix_memalign	stdlib.h		int	FAR void **	size_t	size_t
194	preadv	sys/uio.h		ssize_t	int	FAR const struct iovec *	int	off_t
195	printf	stdio.h		int	FAR const IPTR char *	...
196	pthread_attr_destroy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_attr_t *
197	pthread_attr_getinheritsched	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR const pthread_attr_t *	FAR int *
198	pthread_attr_getschedparam	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR const pthread_attr_t *	FAR struct sched_param *
199	pthread_attr_getschedpolicy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR const pthread_attr_t *	FAR int *
200	pthread_attr_getstacksize	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR const pthread_attr_t *	FAR size_t *
201	pthread_attr_init	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_attr_t *
202	pthread_attr_setinheritsched	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_attr_t *	int
203	pthread_attr_setschedparam	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_attr_t *	FAR const struct sched_param *
204	pthread_attr_setschedpolicy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_attr_t *	int
205	pthread_attr_setstacksize	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_attr_t *	size_t
206	pthread_barrier_destroy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_barrier_t *
207	pthread_barrier_init	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_barrier_t *	FAR const pthread_barrierattr_t *	unsigned int
208	pthread_barrier_wait	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_barrier_t *
209	pthread_barrierattr_destroy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_barrierattr_t *
210	pthread_barrierattr_getpshared	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR const pthread_barrierattr_t *	FAR int *
211	pthread_barrierattr_init	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_barrierattr_t *
212	pthread_barrierattr_setpshared	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_barrierattr_t *	int
213	pthread_cond_destroy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_cond_t *
214	pthread_cond_init	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_cond_t *	FAR const pthread_condattr_t *
215	pthread_cond_timedwait	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_cond_t *	FAR pthread_mutex_t *	FAR const struct timespec *
216	pthread_condattr_destroy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_condattr_t *
217	pthread_condattr_init	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_condattr_t *
218	pthread_condattr_setclock	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_condattr_t *	clockid_t
219	pthread_create	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_t *	FAR const pthread_attr_t *	pthread_startroutine_t	pthread_addr_t
220	pthread_getname_np	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	pthread_t	char *	size_t
221	pthread_getspecific	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0	FAR void *	pthread_key_t
222	pthread_gettid_np	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	pid_t	pthread_t
223	pthread_key_create	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0	int	FAR pthread_key_t *	FAR void () (void )\|FAR void *
224	pthread_key_delete	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0	int	pthread_key_t
225	pthread_mutex_getprioceiling	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_PRIORITY_PROTECT)	int	FAR const pthread_mutex_t *	FAR int *
226	pthread_mutex_lock	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_mutex_t *
227	pthread_mutex_setprioceiling	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_PRIORITY_PROTECT)	int	FAR pthread_mutex_t *	int	FAR int *
228	pthread_mutexattr_destroy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_mutexattr_t *
229	pthread_mutexattr_getprioceiling	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_PRIORITY_PROTECT)	int	FAR pthread_mutexattr_t *	FAR int *
230	pthread_mutexattr_getpshared	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_mutexattr_t *	FAR int *
231	pthread_mutexattr_gettype	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_PTHREAD_MUTEX_TYPES)	int	FAR const pthread_mutexattr_t *	FAR int *
232	pthread_mutexattr_init	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_mutexattr_t *
233	pthread_mutexattr_setprioceiling	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_PRIORITY_PROTECT)	int	FAR pthread_mutexattr_t *	int
234	pthread_mutexattr_setpshared	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_mutexattr_t *	int
235	pthread_mutexattr_settype	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && defined(CONFIG_PTHREAD_MUTEX_TYPES)	int	FAR pthread_mutexattr_t *	int
236	pthread_once	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_once_t*	CODE void (*)(void)
237	pthread_rwlock_destroy	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_rwlock_t *
238	pthread_rwlock_init	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_rwlock_t *restrict	FAR const pthread_rwlockattr_t *
239	pthread_rwlock_rdlock	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_rwlock_t *
240	pthread_rwlock_unlock	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	FAR pthread_rwlock_t *
241	pthread_self	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	pthread_t	void
242	pthread_setname_np	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	int	pthread_t	const char *
243	pthread_setspecific	pthread.h	!defined(CONFIG_DISABLE_PTHREAD) && CONFIG_TLS_NELEM > 0	int	pthread_key_t	FAR const void *
244	pthread_yield	pthread.h	!defined(CONFIG_DISABLE_PTHREAD)	void
245	puts	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR const IPTR char *
246	putwc	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	wchar_t	FAR FILE *
247	putwc_unlocked	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	wchar_t	FAR FILE *
248	putwchar	wchar.h		wint_t	wchar_t
249	pwritev	sys/uio.h		ssize_t	int	FAR const struct iovec *	int	off_t
250	qsort	stdlib.h		void	FAR void *	size_t	size_t	int()(FAR const void ,FAR const void *)
251	raise	signal.h		int	int
252	rand	stdlib.h		int
253	readdir	dirent.h		FAR struct dirent *	FAR DIR *
254	readdir_r	dirent.h		int	FAR DIR *	FAR struct dirent *	FAR struct dirent **
255	readv	sys/uio.h		ssize_t	int	FAR const struct iovec *	int
256	realloc	stdlib.h		FAR void *	FAR void *	size_t
257	remove	stdio.h		int	const char *
258	rewind	stdio.h	defined(CONFIG_FILE_STREAM)	void	FAR FILE *
259	scandir	dirent.h		int	FAR const char *	FAR struct dirent ***	FAR int ()(const struct dirent )\|FAR void *	FAR void *
260	sched_get_priority_max	sched.h		int	int
261	sched_get_priority_min	sched.h		int	int
262	sem_getvalue	semaphore.h		int	FAR sem_t *	FAR int *
263	sem_init	semaphore.h		int	FAR sem_t *	int	unsigned int
264	setlocale	locale.h	defined(CONFIG_LIBC_LOCALE)	FAR char *	int	FAR const char *
265	setlogmask	syslog.h		int	int
266	setpriority	sys/resource.h		int	int	id_t	int
267	shutdown	sys/socket.h	defined(CONFIG_NET)	int	int	int
268	sigaddset	signal.h	!defined(CONFIG_DISABLE_ALL_SIGNALS)	int	FAR sigset_t *	int
269	sigdelset	signal.h	!defined(CONFIG_DISABLE_ALL_SIGNALS)	int	FAR sigset_t *	int
270	sigemptyset	signal.h	!defined(CONFIG_DISABLE_ALL_SIGNALS)	int	FAR sigset_t *
271	sigfillset	signal.h	!defined(CONFIG_DISABLE_ALL_SIGNALS)	int	FAR sigset_t *
272	sigismember	signal.h	!defined(CONFIG_DISABLE_ALL_SIGNALS)	int	FAR const sigset_t *	int
273	signal	signal.h	defined(CONFIG_ENABLE_ALL_SIGNALS)	_sa_handler_t	int	_sa_handler_t
274	sleep	unistd.h		unsigned int	unsigned int
275	snprintf	stdio.h		int	FAR char *	size_t	FAR const IPTR char *	...
276	sprintf	stdio.h		int	FAR char *	FAR const IPTR char *	...
277	sprintf	stdio.h		int	FAR char *	FAR const IPTR char *	...
278	sq_addafter	nuttx/queue.h		void	FAR sq_entry_t *	FAR sq_entry_t *	FAR sq_queue_t *
279	sq_remafter	nuttx/queue.h		FAR sq_entry_t	FAR sq_entry_t *	FAR sq_queue_t *
280	sq_remfirst	nuttx/queue.h		FAR sq_entry_t *	FAR sq_queue_t *
281	sq_remlast	nuttx/queue.h		FAR sq_entry_t *	FAR sq_queue_t *
282	srand	stdlib.h		void	unsigned int
283	sscanf	stdio.h		int	FAR const IPTR char *	FAR const char *	...
284	sscanf	stdio.h		int	FAR const char *	FAR const char *	...
285	statvfs	sys/statvfs.h		int	FAR const char *	FAR struct statvfs *
286	stpcpy	string.h		FAR char *	FAR char *	FAR const char *
287	strcasecmp	strings.h		int	FAR const char *	FAR const char *
288	strcasestr	string.h		FAR char *	FAR const char *	FAR const char *
289	strcat	string.h		FAR char *	FAR char *	FAR const char *
290	strchr	string.h		FAR char *	FAR const char *	int
291	strchrnul	string.h		FAR char *	FAR const char *	int
292	strcmp	string.h		int	FAR const char *	FAR const char *
293	strcoll	string.h	defined(CONFIG_LIBC_LOCALE)	int	FAR const char *	FAR const char *
294	strcpy	string.h		FAR char *	FAR char *	FAR const char *
295	strcspn	string.h		size_t	FAR const char *	FAR const char *
296	strdup	string.h		FAR char *	FAR const char *
297	strerror	string.h		FAR char *	int
298	strerror_r	string.h		int	int	FAR char *	size_t
299	strftime	time.h		size_t	FAR char *	size_t	FAR const char *	FAR const struct tm *
300	strlcpy	string.h		size_t	FAR char *	FAR const char *	size_t
301	strlen	string.h		size_t	FAR const char *
302	strncasecmp	strings.h		int	FAR const char *	FAR const char *	size_t
303	strncat	string.h		FAR char *	FAR char *	FAR const char *	size_t
304	strncmp	string.h		int	FAR const char *	FAR const char *	size_t
305	strncpy	string.h		FAR char *	FAR char *	FAR const char *	size_t
306	strndup	string.h		FAR char *	FAR const char *	size_t
307	strnlen	string.h		size_t	FAR const char *	size_t
308	strpbrk	string.h		FAR char *	FAR const char *	FAR const char *
309	strrchr	string.h		FAR char *	FAR const char *	int
310	strsep	string.h		FAR char *	FAR char **	FAR const char *
311	strspn	string.h		size_t	FAR const char *	FAR const char *
312	strstr	string.h		FAR char *	FAR const char *	FAR const char *
313	strtod	stdlib.h		double	FAR const char *	FAR char **
314	strtod	stdlib.h	defined(CONFIG_HAVE_DOUBLE)	double	FAR const char *	FAR char **
315	strtoimax	inttypes.h		intmax_t	FAR const char *	FAR char **	int
316	strtok	string.h		FAR char *	FAR char *	FAR const char *
317	strtok_r	string.h		FAR char *	FAR char *	FAR const char *	FAR char **
318	strtol	stdlib.h		long	FAR const char *	FAR char **	int
319	strtoll	stdlib.h		long long	FAR const char *	FAR char **	int
320	strtoul	stdlib.h		unsigned long	FAR const char *	FAR char **	int
321	strtoull	stdlib.h		unsigned long long int	FAR const char *	FAR char **	int
322	strtoull	stdlib.h		unsigned long long	FAR const char *	FAR char **	int
323	strtoumax	inttypes.h		uintmax_t	FAR const char *	FAR char **	int
324	strxfrm	string.h	defined(CONFIG_LIBC_LOCALE)	size_t	FAR char *	FAR const char *	size_t
325	swab	unistd.h		void	FAR const void *	FAR void *	ssize_t
326	swprintf	wchar.h		int	FAR wchar_t *	size_t	FAR const wchar_t *	...
327	sysconf	unistd.h		long	int
328	syslog	syslog.h		void	int	FAR const IPTR char *	...
329	task_testcancel	sched.h	defined(CONFIG_CANCELLATION_POINTS)	void
330	task_tls_alloc	nuttx/tls.h	!defined(CONFIG_BUILD_KERNEL) && CONFIG_TLS_TASK_NELEM > 0	int	tls_dtor_t
331	task_tls_get_value	nuttx/tls.h	CONFIG_TLS_TASK_NELEM > 0	uintptr_t	int
332	task_tls_set_value	nuttx/tls.h	CONFIG_TLS_TASK_NELEM > 0	int	int	uintptr_t
333	tcflush	termios.h		int	int	int
334	tcgetattr	termios.h		int	int	FAR struct termios *
335	tcsetattr	termios.h		int	int	int	FAR const struct termios *
336	telldir	dirent.h		off_t	FAR DIR *
337	textdomain	libintl.h	defined(CONFIG_LIBC_LOCALE_GETTEXT)	FAR char *	FAR const char *
338	time	time.h		time_t	FAR time_t *
339	tolower	ctype.h		int	int
340	toupper	ctype.h		int	int
341	towlower	wchar.h		wint_t	wint_t
342	towupper	wchar.h		wint_t	wint_t
343	truncate	unistd.h	!defined(CONFIG_DISABLE_MOUNTPOINT)	int	FAR const char *	off_t
344	uname	sys/utsname.h		int	FAR struct utsname *
345	ungetc	stdio.h	defined(CONFIG_FILE_STREAM)	int	int	FAR FILE *
346	ungetwc	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	wint_t	FAR FILE *
347	ungetwc_unlocked	wchar.h	defined(CONFIG_FILE_STREAM)	wint_t	wint_t	FAR FILE *
348	usleep	unistd.h		int	useconds_t
349	vasprintf	stdio.h		int	FAR char **	FAR const IPTR char *	va_list
350	versionsort	dirent.h		int	FAR const struct dirent **	FAR const struct dirent **
351	vfork	unistd.h	!defined(CONFIG_BUILD_KERNEL) && defined(CONFIG_ARCH_HAVE_VFORK)	pid_t
352	vfprintf	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR FILE *	FAR const IPTR char *	va_list
353	vprintf	stdio.h		int	FAR const IPTR char *	va_list
354	vscanf	stdio.h	defined(CONFIG_FILE_STREAM)	int	FAR const IPTR char *	va_list
355	vsnprintf	stdio.h		int	FAR char *	size_t	FAR const IPTR char *	va_list
356	vsprintf	stdio.h		int	FAR char *	FAR const IPTR char *	va_list
357	vsscanf	stdio.h		int	FAR const char *	FAR const IPTR char *	va_list
358	vsyslog	syslog.h		void	int	FAR const IPTR char *	va_list
359	wcrtomb	wchar.h		size_t	FAR char *	wchar_t	FAR mbstate_t *
360	wcscat	wchar.h		FAR wchar_t *	FAR wchar_t *	FAR const wchar_t *
361	wcschr	wchar.h		FAR wchar_t *	FAR const wchar_t *	wchar_t
362	wcscmp	wchar.h		int	FAR const wchar_t *	FAR const wchar_t *
363	wcscoll	wchar.h		int	FAR const wchar_t *	FAR const wchar_t *
364	wcscpy	wchar.h		FAR wchar_t *	FAR wchar_t *	FAR const wchar_t *
365	wcscspn	wchar.h		size_t	FAR const wchar_t *	FAR const wchar_t *
366	wcsftime	wchar.h		size_t	FAR wchar_t *	size_t	FAR const wchar_t *	FAR const struct tm *
367	wcslcat	wchar.h		size_t	FAR wchar_t *	FAR const wchar_t *	size_t
368	wcsncat	wchar.h		FAR wchar_t *	FAR wchar_t *	FAR const wchar_t *	size_t
369	wcsncmp	wchar.h		int	FAR const wchar_t *	FAR const wchar_t *	size_t
370	wcsncpy	wchar.h		FAR wchar_t *	FAR wchar_t *	FAR const wchar_t *	size_t
371	wcslcpy	wchar.h		size_t	FAR wchar_t *	FAR const wchar_t *	size_t
372	wcslen	wchar.h		size_t	FAR const wchar_t *
373	wcsnrtombs	wchar.h		size_t	FAR char *	FAR const wchar_t **	size_t	size_t	FAR mbstate_t *
374	wcspbrk	wchar.h		FAR wchar_t *	FAR const wchar_t *	FAR const wchar_t *
375	wcsrchr	wchar.h		FAR wchar_t *	FAR const wchar_t *	wchar_t
376	wcsspn	wchar.h		size_t	FAR const wchar_t *	FAR const wchar_t *
377	wcsstr	wchar.h		FAR wchar_t *	FAR const wchar_t *	FAR const wchar_t *
378	wcsrtombs	wchar.h		size_t	FAR char *	FAR const wchar_t **	size_t	FAR mbstate_t *
379	wcstod	wchar.h		double	FAR const wchar_t *	FAR wchar_t **
380	wcstof	wchar.h		float	FAR const wchar_t *	FAR wchar_t **
381	wcstok	wchar.h		FAR wchar_t *	FAR wchar_t *	FAR const wchar_t *	FAR wchar_t **
382	wcstol	wchar.h		long int	FAR const wchar_t *	FAR wchar_t **	int
383	wcstold	wchar.h		long double	FAR const wchar_t *	FAR wchar_t **
384	wcstoll	wchar.h		long long int	FAR const wchar_t *	FAR wchar_t **	int
385	wcstombs	stdlib.h		size_t	FAR char *	FAR const wchar_t *	size_t
386	wcstoul	wchar.h		unsigned long int	FAR const wchar_t *	FAR wchar_t **	int
387	wcswcs	wchar.h		FAR wchar_t *	FAR const wchar_t *	FAR const wchar_t *
388	wcswidth	wchar.h		int	FAR const wchar_t *	size_t
389	wcsxfrm	wchar.h		size_t	FAR wchar_t *	FAR const wchar_t *	size_t
390	wctob	wchar.h		int	wint_t
391	wctomb	stdlib.h		int	FAR char *	wchar_t
392	wctype	wctype.h		wctype_t	FAR const char *
393	wcwidth	wchar.h		int	wchar_t
394	wmemchr	wchar.h		FAR wchar_t *	FAR const wchar_t *	wchar_t	size_t
395	wmemcmp	wchar.h		int	FAR const wchar_t *	FAR const wchar_t *	size_t
396	wmemcpy	wchar.h		FAR wchat_t *	FAR wchar_t *	FAR const wchar_t *	size_t
397	wmemmove	wchar.h		FAR wchat_t *	FAR wchar_t *	FAR const wchar_t *	size_t
398	wmemset	wchar.h		FAR wchat_t *	FAR wchar_t *	wchar_t	size_t
399	writev	sys/uio.h		ssize_t	int	FAR const struct iovec *	int

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