glibc/misc/Versions
Florian Weimer 706ad1e7af Add the __libc_single_threaded variable
The variable is placed in libc.so, and it can be true only in
an outer libc, not libcs loaded via dlmopen or static dlopen.
Since thread creation from inner namespaces does not work,
pthread_create can update __libc_single_threaded directly.

Using __libc_early_init and its initial flag, implementation of this
variable is very straightforward.  A future version may reset the flag
during fork (but not in an inner namespace), or after joining all
threads except one.

Reviewed-by: DJ Delorie <dj@redhat.com>
2020-07-06 11:15:58 +02:00

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libc {
GLIBC_2.0 {
# global variables
___brk_addr; __curbrk; __progname; __progname_full;
# interface of malloc functions
__sbrk; __getpagesize;
# functions used in other libraries
__select;
# variables in normal name space
error_message_count; error_one_per_line; error_print_progname;
# variables in normal name space
loc1; loc2; locs;
program_invocation_name; program_invocation_short_name;
# a*
acct; addmntent; advance;
# b*
brk;
# c*
chflags; chroot; closelog;
# d*
daemon; dirname;
# e*
ecvt; ecvt_r; endfsent; endmntent; endttyent; endusershell;
# e*
err; error; error_at_line; errx;
# f*
fchflags; fcvt; fcvt_r; fdatasync; fsync; ftruncate;
# g*
gcvt; get_avphys_pages; get_nprocs; get_nprocs_conf; get_phys_pages;
getfsent; getfsfile; getfsspec; gethostid; gethostname; getmntent;
getmntent_r; getpagesize; getpass; getttyent; getttynam; getusershell;
gtty;
# h*
hasmntopt; hcreate; hcreate_r; hdestroy; hdestroy_r; hsearch; hsearch_r;
# i*
insque; ioctl;
# j*
jrand48; jrand48_r; lfind; lsearch;
# m*
madvise; mkstemp; mktemp; mlock; mlockall; mmap; mount; mprotect; msync;
munlock; munlockall; munmap;
# o*
openlog;
# p*
ptrace;
# q*
qecvt; qecvt_r; qfcvt; qfcvt_r; qgcvt;
# r*
readv; reboot; remque; revoke;
# s*
sbrk; select; setdomainname; setfsent; sethostent; sethostid; sethostname;
setlogmask; setmntent; setregid; setreuid; setttyent; setusershell; sstk;
stty; sync; syscall; syslog;
# t*
tdelete; tfind; truncate; tsearch; ttyslot; twalk;
# u*
ualarm; usleep; ustat; utimes;
# v*
verr; verrx; vhangup; vsyslog; vwarn; vwarnx;
# w*
warn; warnx;
# w*
writev;
}
GLIBC_2.1 {
# f*
ftruncate64;
# m*
mmap64;
# t*
tdestroy; truncate64;
}
GLIBC_2.2 {
# g*
getloadavg;
# m*
mincore; mkdtemp; mkstemp64;
# p*
posix_madvise;
}
GLIBC_2.3 {
# f*
fgetxattr; flistxattr; fremovexattr; fsetxattr;
futimes;
# g*
getxattr;
# l*
listxattr;
lgetxattr; llistxattr; lremovexattr; lsetxattr;
lutimes;
# r*
removexattr;
# s*
setxattr;
}
GLIBC_2.3.3 {
remap_file_pages;
}
GLIBC_2.4 {
futimesat;
__syslog_chk; __vsyslog_chk;
}
GLIBC_2.7 {
mkostemp; mkostemp64;
}
GLIBC_2.10 {
preadv; preadv64; pwritev; pwritev64;
}
GLIBC_2.11 {
mkstemps; mkstemps64; mkostemps; mkostemps64;
}
GLIBC_2.14 {
syncfs;
}
GLIBC_2.16 {
__getauxval; getauxval;
}
GLIBC_2.23 {
# SHLIB_COMPAT(GLIBC_2_0, GLIBC_2_23) used in regexp.c
}
GLIBC_2.25 {
gnu_dev_major; gnu_dev_minor; gnu_dev_makedev;
}
GLIBC_2.26 {
preadv2; preadv64v2; pwritev2; pwritev64v2;
}
GLIBC_2.30 {
twalk_r;
}
GLIBC_2.32 {
__libc_single_threaded;
}
GLIBC_PRIVATE {
__madvise;
__mktemp;
__libc_ifunc_impl_list;
__tdelete; __tfind; __tsearch; __twalk; __twalk_r;
__mmap; __munmap; __mprotect;
__sched_get_priority_min; __sched_get_priority_max;
__libc_allocate_once_slow;
}
}