platform_bionic/docs/status.md

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Android bionic status
=====================
libc
----
Current libc symbols: https://android.googlesource.com/platform/bionic/+/master/libc/libc.map.txt
New libc functions in P:
* `__freading`/`__fwriting` (completing <stdio_ext.h>)
* `endhostent`/endnetent`/`endprotoent`/`getnetent`/`getprotoent`/`sethostent`/`setnetent`/`setprotoent` (completing <netdb.h>)
* `getentropy`/`getrandom` (adding <sys/random.h>)
* `getlogin_r`
* `glob`/`globfree` (adding <glob.h>)
* `hcreate`/hcreate_r`/`hdestroy`/`hdestroy_r`/`hsearch`/`hsearch_r` (completing <search.h>)
* `iconv`/`iconv_close`/`iconv_open` (adding <iconv.h>)
* `pthread_setschedprio`
* <spawn.h>
* `swab`
* `syncfs`
New libc functions in O:
* `sendto` FORTIFY support
* `__system_property_read_callback`/`__system_property_wait`
* legacy `bsd_signal`
* `catclose`/`catgets`/`catopen` (adding <nl_types.h>)
* `ctermid`
* all 6 <grp.h>/<pwd.h> (get|set|end)(gr|pw)ent functions
* `futimes`/`futimesat`/`lutimes`
* `getdomainname`/`setdomainname`
* `getsubopt`
* `hasmntopt`
* `mallopt`
* `mblen`
* 4 <sys/msg.h> `msg*` functions
* <langinfo.h> `nl_langinfo`/`nl_langinfo_l`
* `pthread_getname_np`
* 2 new Linux system calls `quotactl` and `sync_file_range`
* 4 <sys/sem.h> `sem*` functions
* 4 <sys/shm.h> `shm*` functions
* 5 legacy <signal.h> functions: `sighold`/`sigignore`/`sigpause`/`sigrelse`/`sigset`
* `strtod_l`/`strtof_l`/`strtol_l`/`strtoul_l`
* <wctype.h> `towctrans`/`towctrans_l`/`wctrans`/`wctrans_l`
New libc functions in N:
* more FORTIFY support functions (`fread`/`fwrite`/`getcwd`/`pwrite`/`write`)
* all remaining `_FILE_OFFSET_BITS=64` functions, completing `_FILE_OFFSET_BITS=64` support in bionic (8)
* all 7 `pthread_barrier*` functions
* all 5 `pthread_spin*` functions
* `lockf`/`preadv`/`pwritev`/`scandirat` and `off64_t` variants
* `adjtimex`/`clock_adjtime`
* `getifaddrs`/`freeifaddrs`/`if_freenameindex`/`if_nameindex`
* `getgrgid_r`/`getgrnam_r`
* GNU extensions `fileno_unlocked`/`strchrnul`
* 32-bit `prlimit`
libc function count over time:
G 803, H 825, I 826, J 846, J-MR1 873, J-MR2 881, K 896, L 1116, M 1181, N 1226, O 1278
```
ndk-r17$ for i in `ls -1v platforms/android-*/arch-arm/usr/lib/libc.so` ; do echo $i; nm $i | grep -vw [AbdNnt] | grep -vw B | wc -l ; done
```
Run `./libc/tools/check-symbols-glibc.py` in bionic/ for the current
list of POSIX functions implemented by glibc but not by bionic. Currently
(2017-10):
```
aio_cancel
aio_error
aio_fsync
aio_read
aio_return
aio_suspend
aio_write
fexecve
fmtmsg
getdate
getdate_err
lio_listio
pthread_attr_getinheritsched
pthread_attr_setinheritsched
pthread_cancel
pthread_mutex_consistent
pthread_mutex_getprioceiling
pthread_mutex_setprioceiling
pthread_mutexattr_getprioceiling
pthread_mutexattr_getprotocol
pthread_mutexattr_getrobust
pthread_mutexattr_setprioceiling
pthread_mutexattr_setprotocol
pthread_mutexattr_setrobust
pthread_setcancelstate
pthread_setcanceltype
pthread_testcancel
sockatmark
wordexp
wordfree
```
libm
----
Current libm symbols: https://android.googlesource.com/platform/bionic/+/master/libm/libm.map.txt
0 remaining missing POSIX libm functions.
19 new libm functions in O: complex trig/exp/log functions.
libm function count over time:
G 158, J-MR2 164, L 220, M 265, O 284