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>)
  • getlogin_r
  • iconv/iconv_close/iconv_open (adding <iconv.h>)
  • 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 (2017-09):

aio_cancel
aio_error
aio_fsync
aio_read
aio_return
aio_suspend
aio_write
endhostent
endnetent
endprotoent
endutxent
fexecve
fmtmsg
getdate
getdate_err
getnetent
getprotoent
glob
globfree
hcreate
hdestroy
hsearch
lio_listio
posix_spawn
posix_spawn_file_actions_addclose
posix_spawn_file_actions_adddup2
posix_spawn_file_actions_addopen
posix_spawn_file_actions_destroy
posix_spawn_file_actions_init
posix_spawnattr_destroy
posix_spawnattr_getflags
posix_spawnattr_getpgroup
posix_spawnattr_getschedparam
posix_spawnattr_getschedpolicy
posix_spawnattr_getsigdefault
posix_spawnattr_getsigmask
posix_spawnattr_init
posix_spawnattr_setflags
posix_spawnattr_setpgroup
posix_spawnattr_setschedparam
posix_spawnattr_setschedpolicy
posix_spawnattr_setsigdefault
posix_spawnattr_setsigmask
posix_spawnp
pthread_attr_getinheritsched
pthread_attr_setinheritsched
pthread_cancel
pthread_getconcurrency
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_setconcurrency
pthread_setschedprio
pthread_testcancel
sethostent
setnetent
setprotoent
sockatmark
swab
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