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Re: [PATCH] nptl: Add pthread_thread_number_np function
- From: Andrew Pinski <pinskia at gmail dot com>
- To: Florian Weimer <fweimer at redhat dot com>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Thu, 14 Dec 2017 23:54:37 -0800
- Subject: Re: [PATCH] nptl: Add pthread_thread_number_np function
- Authentication-results: sourceware.org; auth=none
- References: <20171214185611.D08E1439942EA@oldenburg.str.redhat.com> <CA+=Sn1=3LF7DLHkM-ToTfrnYGXjg_HOYKTGPcN6kZnGySnHCFg@mail.gmail.com>
On Thu, Dec 14, 2017 at 4:29 PM, Andrew Pinski <pinskia@gmail.com> wrote:
> On Thu, Dec 14, 2017 at 10:56 AM, Florian Weimer <fweimer@redhat.com> wrote:
>> The implementation is actually in libc.so. With a full implementation
>> of pthread_self in libc.so, pthread_thread_number_np is completely
>> usable without libpthread.
>>
>> 2017-12-14 Florian Weimer <fweimer@redhat.com>
>>
>> nptl: Add pthread_thread_number_np function.
>> * csu/libc-tls.c (__libc_setup_tls): Call __dl_inittcb.
>> * elf/Makefile (dl-routines): Add dl-inittcb.
>> * elf/dl-inittcb.c: New file.
>> * elf/rtld.c (init_tls): Call __dl_inittcb.
>> * manual/threads.texi (Non-POSIX Extensions): Reference Non-POSIX
>> Extensions.
>> (Non-POSIX Extensions): New node.
>> * nptl/Makefile (routines): Add thread_number.
>> (tests): Add tst-thread_number-single, tst-thread_number-multi,
>> tst-thread_number-single-static, tst-thread_number-multi-static.
>> (tests-nolibpthread): Add tst-thread_number-single,
>> tst-thread_number-single-static.
>> (tests-static): Add tst-thread_number-single-static,
>> tst-thread_number-multi-static.
>> * nptl/Versions (GLIBC_2.27): Export pthread_thread_number_np.
>> * nptl/allocatestack.c (allocate_stack): Increment
>> global_thread_number under__default_pthread_attr_lock and use its
>> value to set the new thread number.
>> * nptl/descr.h (struct pthread): Add number member.
>> * nptl/thread_number.c: New file.
>> * nptl/tst-thread_number-multi.c: Likewise.
>> * nptl/tst-thread_number-single.c: Likewise.
>> * nptl/tst-thread_number-multi-static.c: Likewise.
>> * nptl/tst-thread_number-single-static.c: Likewise.
>> * sysdeps/nptl/pthread.h (pthread_thread_number_np): Declare.
>> * sysdeps/unix/sysv/linux/libc**.abilist: Update.
>>
>> diff --git a/csu/libc-tls.c b/csu/libc-tls.c
>> index 00138eb43a..af81cba12c 100644
>> --- a/csu/libc-tls.c
>> +++ b/csu/libc-tls.c
>> @@ -195,6 +195,7 @@ __libc_setup_tls (void)
>> #endif
>> if (__builtin_expect (lossage != NULL, 0))
>> _startup_fatal (lossage);
>> + __dl_inittcb ();
>>
>> /* Update the executable's link map with enough information to make
>> the TLS routines happy. */
>> diff --git a/elf/Makefile b/elf/Makefile
>> index 8563555079..66ce2953a4 100644
>> --- a/elf/Makefile
>> +++ b/elf/Makefile
>> @@ -30,7 +30,7 @@ routines = $(all-dl-routines) dl-support dl-iteratephdr \
>> # profiled libraries.
>> dl-routines = $(addprefix dl-,load lookup object reloc deps hwcaps \
>> runtime init fini debug misc \
>> - version profile tls origin scope \
>> + version profile tls inittcb origin scope \
>> execstack caller open close trampoline \
>> exception sort-maps)
>> ifeq (yes,$(use-ldconfig))
>> diff --git a/elf/dl-inittcb.c b/elf/dl-inittcb.c
>> new file mode 100644
>> index 0000000000..5a70e9775d
>> --- /dev/null
>> +++ b/elf/dl-inittcb.c
>> @@ -0,0 +1,22 @@
>> +/* Initialize TCB contents. Generic version.
>> + Copyright (C) 2017 Free Software Foundation, Inc.
>> + This file is part of the GNU C Library.
>> +
>> + The GNU C Library is free software; you can redistribute it and/or
>> + modify it under the terms of the GNU Lesser General Public
>> + License as published by the Free Software Foundation; either
>> + version 2.1 of the License, or (at your option) any later version.
>> +
>> + The GNU C Library is distributed in the hope that it will be useful,
>> + but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + Lesser General Public License for more details.
>> +
>> + You should have received a copy of the GNU Lesser General Public
>> + License along with the GNU C Library; if not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +void
>> +__dl_inittcb (void)
>> +{
>> +}
>> diff --git a/elf/rtld.c b/elf/rtld.c
>> index cfd3729b8e..214e2312fa 100644
>> --- a/elf/rtld.c
>> +++ b/elf/rtld.c
>> @@ -740,6 +740,7 @@ cannot allocate TLS data structures for initial thread\n");
>> const char *lossage = TLS_INIT_TP (tcbp);
>> if (__glibc_unlikely (lossage != NULL))
>> _dl_fatal_printf ("cannot set up thread-local storage: %s\n", lossage);
>> + __dl_inittcb ();
>> tls_init_tp_called = true;
>>
>> return tcbp;
>> diff --git a/manual/threads.texi b/manual/threads.texi
>> index 769d974d50..6c62ff3da0 100644
>> --- a/manual/threads.texi
>> +++ b/manual/threads.texi
>> @@ -80,6 +80,7 @@ the standard.
>> @menu
>> * Default Thread Attributes:: Setting default attributes for
>> threads in a process.
>> +* Identifying Threads:: Unique identifiers for threads.
>> @end menu
>>
>> @node Default Thread Attributes
>> @@ -124,6 +125,29 @@ The system does not have sufficient memory.
>> @end table
>> @end deftypefun
>>
>> +@node Identifying Threads
>> +@subsection Unique identifiers for threads
>> +
>> +@Theglibc{} provides a non-standard function to obtain a unique thread
>> +identifier.
>> +
>> +@deftypefun uint64_t pthread_thread_number_np (pthread_t @var{thread})
>> +@standards{GNU, pthread.h}
>> +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
>> +
>> +This function returns a number that uniquely identifies @var{thread}
>> +among all past, current, and future running threads. This number does
>> +not change during the life-time of the thread. Once returned by this
>> +function, a number will not be reused after the thread terminates.
>> +
>> +The returned number is only unique with regards to the current process.
>> +It may be shared by subprocesses and other processes in the system.
>> +
>> +The initial (main) thread has number 1. Thread numbers are not
>> +necessarily assigned in a consecutive fashion. They bear no
>> +relationship to process IDs or thread IDs assigned by the kernel.
>> +@end deftypefun
>> +
>> @c FIXME these are undocumented:
>> @c pthread_atfork
>> @c pthread_attr_destroy
>> diff --git a/nptl/Makefile b/nptl/Makefile
>> index ae388d1112..087fb6a8b5 100644
>> --- a/nptl/Makefile
>> +++ b/nptl/Makefile
>> @@ -30,7 +30,7 @@ install-lib-ldscripts := libpthread.so
>>
>> routines = alloca_cutoff forward libc-lowlevellock libc-cancellation \
>> libc-cleanup libc_pthread_init libc_multiple_threads \
>> - register-atfork unregister-atfork pthread_self
>> + register-atfork unregister-atfork pthread_self thread_number
>> shared-only-routines = forward
>>
>> # We need to provide certain routines for compatibility with existing
>> @@ -302,7 +302,8 @@ tests = tst-attr1 tst-attr2 tst-attr3 tst-default-attr \
>> c89 gnu89 c99 gnu99 c11 gnu11) \
>> tst-bad-schedattr \
>> tst-thread_local1 tst-mutex-errorcheck tst-robust10 \
>> - tst-robust-fork tst-create-detached tst-memstream
>> + tst-robust-fork tst-create-detached tst-memstream \
>> + tst-thread_number-single tst-thread_number-multi \
>>
>> tests-internal := tst-rwlock19 tst-rwlock20 \
>> tst-sem11 tst-sem12 tst-sem13 \
>> @@ -318,7 +319,9 @@ test-srcs = tst-oddstacklimit
>> test-xfail-tst-once5 = yes
>>
>> # Files which must not be linked with libpthread.
>> -tests-nolibpthread = tst-unload
>> +tests-nolibpthread = tst-unload \
>> + tst-thread_number-single \
>> + tst-thread_number-single-static \
>>
>> gen-as-const-headers = pthread-errnos.sym \
>> unwindbuf.sym \
>> @@ -433,9 +436,13 @@ link-libc-static := $(common-objpfx)libc.a $(static-gnulib) \
>> tests-static += tst-locale1 tst-locale2 tst-stackguard1-static \
>> tst-cancel21-static tst-cancel24-static tst-cond8-static \
>> tst-mutex8-static tst-mutexpi8-static tst-sem11-static \
>> - tst-sem12-static
>> + tst-sem12-static tst-thread_number-single-static \
>> + tst-thread_number-multi-static \
>> +
>> tests += tst-cancel21-static tst-cancel24-static \
>> - tst-cond8-static
>> + tst-cond8-static tst-thread_number-single-static \
>> + tst-thread_number-multi-static \
>> +
>> tests-internal += tst-sem11-static tst-sem12-static tst-stackguard1-static
>> xtests-static += tst-setuid1-static
>>
>> diff --git a/nptl/Versions b/nptl/Versions
>> index 0ae5def464..8b6c839408 100644
>> --- a/nptl/Versions
>> +++ b/nptl/Versions
>> @@ -28,6 +28,9 @@ libc {
>> pthread_cond_wait; pthread_cond_signal;
>> pthread_cond_broadcast; pthread_cond_timedwait;
>> }
>> + GLBIC_2.27 {
>> + pthread_thread_number_np;
>> + }
>> GLIBC_PRIVATE {
>> __libc_alloca_cutoff;
>> # Internal libc interface to libpthread
>> diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
>> index 1cc7893195..0e1cf3939e 100644
>> --- a/nptl/allocatestack.c
>> +++ b/nptl/allocatestack.c
>> @@ -413,16 +413,21 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
>> assert (powerof2 (pagesize_m1 + 1));
>> assert (TCB_ALIGNMENT >= STACK_ALIGN);
>>
>> - /* Get the stack size from the attribute if it is set. Otherwise we
>> - use the default we determined at start time. */
>> - if (attr->stacksize != 0)
>> - size = attr->stacksize;
>> - else
>> - {
>> - lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
>> + uint64_t thread_number;
>> + lll_lock (__default_pthread_attr_lock, LLL_PRIVATE);
>> + {
>> + /* Number 1 is reserved for the initial thread. */
>> + static uint64_t global_thread_number = 1;
>> + thread_number = ++global_thread_number;
>> +
>> + /* Get the stack size from the attribute if it is set. Otherwise
>> + we use the default we determined at start time. */
>> + if (attr->stacksize != 0)
>> + size = attr->stacksize;
>> + else
>> size = __default_pthread_attr.stacksize;
>> - lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
>> - }
>> + }
>> + lll_unlock (__default_pthread_attr_lock, LLL_PRIVATE);
>
>
> Why can't you just make global_thread_number do an atomic addition
> instead of the lock here? It will be slightly faster. But I notice
> you don't handle the case where you create and destroy over 2^64-1
> threads (that is an overflow of global_thread_number). You don't even
> mention this limitation any where. I can think of (maybe bad)
> examples where this could be the case. Treating threads as cheap as
> run pools. Yes it is not a good idea to do that but people can do it.
So I did the math and I take back my objection with respect to the
overflow. It would take more than a million years to overflow 64bit.
Even if creating a thread was less than 1 microsecond.
Thanks,
Andrew
>
> Thanks,
> Andrew
>
>>
>> /* Get memory for the stack. */
>> if (__glibc_unlikely (attr->flags & ATTR_FLAG_STACKADDR))
>> @@ -758,6 +763,8 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
>> #endif
>> pd->robust_head.list = &pd->robust_head;
>>
>> + pd->number = thread_number;
>> +
>> /* We place the thread descriptor at the end of the stack. */
>> *pdp = pd;
>>
>> diff --git a/nptl/descr.h b/nptl/descr.h
>> index c83b17b674..49e266139e 100644
>> --- a/nptl/descr.h
>> +++ b/nptl/descr.h
>> @@ -395,6 +395,9 @@ struct pthread
>> /* Resolver state. */
>> struct __res_state res;
>>
>> + /* Unique number assigned to this thread. */
>> + uint64_t number;
>> +
>> /* This member must be last. */
>> char end_padding[];
>>
>> diff --git a/nptl/thread_number.c b/nptl/thread_number.c
>> new file mode 100644
>> index 0000000000..a9fdaa508b
>> --- /dev/null
>> +++ b/nptl/thread_number.c
>> @@ -0,0 +1,26 @@
>> +/* Unique numbers for threads.
>> + Copyright (C) 2017 Free Software Foundation, Inc.
>> + This file is part of the GNU C Library.
>> +
>> + The GNU C Library is free software; you can redistribute it and/or
>> + modify it under the terms of the GNU Lesser General Public
>> + License as published by the Free Software Foundation; either
>> + version 2.1 of the License, or (at your option) any later version.
>> +
>> + The GNU C Library is distributed in the hope that it will be useful,
>> + but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + Lesser General Public License for more details.
>> +
>> + You should have received a copy of the GNU Lesser General Public
>> + License along with the GNU C Library; if not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +#include "pthreadP.h"
>> +
>> +__uint64_t
>> +pthread_thread_number_np (pthread_t threadid)
>> +{
>> + struct pthread *pd = (struct pthread *) threadid;
>> + return pd->number;
>> +}
>> diff --git a/nptl/tst-thread_number-multi-static.c b/nptl/tst-thread_number-multi-static.c
>> new file mode 100644
>> index 0000000000..658928cfd5
>> --- /dev/null
>> +++ b/nptl/tst-thread_number-multi-static.c
>> @@ -0,0 +1,19 @@
>> +/* Test unique numbers for threads, static multi-threaded version.
>> + Copyright (C) 2017 Free Software Foundation, Inc.
>> + This file is part of the GNU C Library.
>> +
>> + The GNU C Library is free software; you can redistribute it and/or
>> + modify it under the terms of the GNU Lesser General Public
>> + License as published by the Free Software Foundation; either
>> + version 2.1 of the License, or (at your option) any later version.
>> +
>> + The GNU C Library is distributed in the hope that it will be useful,
>> + but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + Lesser General Public License for more details.
>> +
>> + You should have received a copy of the GNU Lesser General Public
>> + License along with the GNU C Library; if not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +#include "tst-thread_number-multi.c"
>> diff --git a/nptl/tst-thread_number-multi.c b/nptl/tst-thread_number-multi.c
>> new file mode 100644
>> index 0000000000..e26f19e44a
>> --- /dev/null
>> +++ b/nptl/tst-thread_number-multi.c
>> @@ -0,0 +1,99 @@
>> +/* Test unique numbers for threads, non-static multi-threaded version.
>> + Copyright (C) 2017 Free Software Foundation, Inc.
>> + This file is part of the GNU C Library.
>> +
>> + The GNU C Library is free software; you can redistribute it and/or
>> + modify it under the terms of the GNU Lesser General Public
>> + License as published by the Free Software Foundation; either
>> + version 2.1 of the License, or (at your option) any later version.
>> +
>> + The GNU C Library is distributed in the hope that it will be useful,
>> + but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + Lesser General Public License for more details.
>> +
>> + You should have received a copy of the GNU Lesser General Public
>> + License along with the GNU C Library; if not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +#include <pthread.h>
>> +#include <stdbool.h>
>> +#include <stdint.h>
>> +#include <stdlib.h>
>> +#include <support/check.h>
>> +#include <support/namespace.h>
>> +#include <support/xthread.h>
>> +
>> +static void
>> +subprocess (void *closure)
>> +{
>> + TEST_COMPARE (pthread_thread_number_np (pthread_self ()), 1U);
>> +}
>> +
>> +static void *
>> +subthread (void *closure)
>> +{
>> + if (closure != NULL)
>> + xpthread_barrier_wait (closure);
>> + return NULL;
>> +}
>> +
>> +static int
>> +compare (const void *pleft, const void *pright)
>> +{
>> + uint64_t left = *(const uint64_t *)pleft;
>> + uint64_t right = *(const uint64_t *)pright;
>> + if (left < right)
>> + return -1;
>> + if (left > right)
>> + return 1;
>> + return 0;
>> +}
>> +
>> +static int
>> +do_test (void)
>> +{
>> + TEST_COMPARE (pthread_thread_number_np (pthread_self ()), 1U);
>> + support_isolate_in_subprocess (subprocess, NULL);
>> +
>> + /* Create thread_count threads, half of which are joined
>> + immediately, have of which stay arround. */
>> + enum { thread_count = 10 };
>> + pthread_barrier_t barrier;
>> + xpthread_barrier_init (&barrier, NULL, thread_count / 2 + 1);
>> + uint64_t ids[thread_count];
>> + pthread_t threads[thread_count]; /* Only even-numbered entries are valid. */
>> + for (int i = 0; i < thread_count; ++i)
>> + {
>> + bool stay_around = (i % 2) == 0;
>> + threads[i] = xpthread_create (NULL, subthread,
>> + stay_around ? &barrier : NULL);
>> + ids[i] = pthread_thread_number_np (threads[i]);
>> + TEST_VERIFY (ids[i] != 1);
>> + if (!stay_around)
>> + xpthread_join (threads[i]);
>> + }
>> +
>> + /* Check that the IDs are all distinct. */
>> + qsort (ids, thread_count, sizeof (ids[0]), compare);
>> + for (int i = 1; i < thread_count; ++i)
>> + TEST_VERIFY (ids[i - 1] < ids[i]);
>> +
>> + /* Main thread ID should remain at 1. */
>> + TEST_COMPARE (pthread_thread_number_np (pthread_self ()), 1U);
>> + support_isolate_in_subprocess (subprocess, NULL);
>> +
>> + /* Clean up. */
>> + xpthread_barrier_wait (&barrier);
>> + for (int i = 0; i < thread_count; ++i)
>> + if ((i % 2) == 0)
>> + xpthread_join (threads[i]);
>> +
>> + /* Main thread ID should still remain at 1. */
>> + TEST_COMPARE (pthread_thread_number_np (pthread_self ()), 1U);
>> + support_isolate_in_subprocess (subprocess, NULL);
>> +
>> + return 0;
>> +}
>> +
>> +#include <support/test-driver.c>
>> diff --git a/nptl/tst-thread_number-single-static.c b/nptl/tst-thread_number-single-static.c
>> new file mode 100644
>> index 0000000000..5c21063c36
>> --- /dev/null
>> +++ b/nptl/tst-thread_number-single-static.c
>> @@ -0,0 +1,19 @@
>> +/* Test unique numbers for threads, static single-threaded version.
>> + Copyright (C) 2017 Free Software Foundation, Inc.
>> + This file is part of the GNU C Library.
>> +
>> + The GNU C Library is free software; you can redistribute it and/or
>> + modify it under the terms of the GNU Lesser General Public
>> + License as published by the Free Software Foundation; either
>> + version 2.1 of the License, or (at your option) any later version.
>> +
>> + The GNU C Library is distributed in the hope that it will be useful,
>> + but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + Lesser General Public License for more details.
>> +
>> + You should have received a copy of the GNU Lesser General Public
>> + License along with the GNU C Library; if not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +#include "tst-thread_number-single.c"
>> diff --git a/nptl/tst-thread_number-single.c b/nptl/tst-thread_number-single.c
>> new file mode 100644
>> index 0000000000..43497205c7
>> --- /dev/null
>> +++ b/nptl/tst-thread_number-single.c
>> @@ -0,0 +1,38 @@
>> +/* Test unique numbers for threads, non-static single-threaded version.
>> + Copyright (C) 2017 Free Software Foundation, Inc.
>> + This file is part of the GNU C Library.
>> +
>> + The GNU C Library is free software; you can redistribute it and/or
>> + modify it under the terms of the GNU Lesser General Public
>> + License as published by the Free Software Foundation; either
>> + version 2.1 of the License, or (at your option) any later version.
>> +
>> + The GNU C Library is distributed in the hope that it will be useful,
>> + but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + Lesser General Public License for more details.
>> +
>> + You should have received a copy of the GNU Lesser General Public
>> + License along with the GNU C Library; if not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +#include <pthread.h>
>> +#include <support/check.h>
>> +#include <support/namespace.h>
>> +
>> +static void
>> +subprocess (void *closure)
>> +{
>> + TEST_COMPARE (pthread_thread_number_np (pthread_self ()), 1U);
>> +}
>> +
>> +static int
>> +do_test (void)
>> +{
>> + TEST_COMPARE (pthread_thread_number_np (pthread_self ()), 1U);
>> + support_isolate_in_subprocess (subprocess, NULL);
>> +
>> + return 0;
>> +}
>> +
>> +#include <support/test-driver.c>
>> diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
>> index 7a65dc641c..99f2e58875 100644
>> --- a/sysdeps/generic/ldsodefs.h
>> +++ b/sysdeps/generic/ldsodefs.h
>> @@ -1056,6 +1056,10 @@ void __libc_setup_tls (void);
>> void __pthread_initialize_minimal (void) weak_function;
>> #endif
>>
>> +/* Initialize the already-existing TCB for the main thread. Called
>> + during dynamic linker startup or from __libc_setup_tls. */
>> +void __dl_inittcb (void) attribute_hidden;
>> +
>> /* Allocate memory for static TLS block (unless MEM is nonzero) and dtv. */
>> extern void *_dl_allocate_tls (void *mem);
>> rtld_hidden_proto (_dl_allocate_tls)
>> diff --git a/sysdeps/nptl/dl-inittcb.c b/sysdeps/nptl/dl-inittcb.c
>> new file mode 100644
>> index 0000000000..c25424dfa6
>> --- /dev/null
>> +++ b/sysdeps/nptl/dl-inittcb.c
>> @@ -0,0 +1,27 @@
>> +/* Initialize TCB contents. NPTL version.
>> + Copyright (C) 2017 Free Software Foundation, Inc.
>> + This file is part of the GNU C Library.
>> +
>> + The GNU C Library is free software; you can redistribute it and/or
>> + modify it under the terms of the GNU Lesser General Public
>> + License as published by the Free Software Foundation; either
>> + version 2.1 of the License, or (at your option) any later version.
>> +
>> + The GNU C Library is distributed in the hope that it will be useful,
>> + but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
>> + Lesser General Public License for more details.
>> +
>> + You should have received a copy of the GNU Lesser General Public
>> + License along with the GNU C Library; if not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +#include <ldsodefs.h>
>> +#include <tls.h>
>> +
>> +void
>> +__dl_inittcb (void)
>> +{
>> + /* The main thread has number 1. */
>> + THREAD_SELF->number = 1;
>> +}
>> diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h
>> index 2b2b386ab3..e0714ed951 100644
>> --- a/sysdeps/nptl/pthread.h
>> +++ b/sysdeps/nptl/pthread.h
>> @@ -1148,6 +1148,10 @@ extern int pthread_atfork (void (*__prepare) (void),
>> void (*__child) (void)) __THROW;
>>
>>
>> +/* Return a number uniquely identifying THREAD, even after its
>> + termination. */
>> +__uint64_t pthread_thread_number_np (pthread_t __thread_id) __THROW;
>> +
>> #ifdef __USE_EXTERN_INLINES
>> /* Optimizations. */
>> __extern_inline int
>> diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
>> index ec0ead15dd..e206f77540 100644
>> --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.17 GLIBC_2.17 A
>> GLIBC_2.17 _Exit F
>> GLIBC_2.17 _IO_2_1_stderr_ D 0xe0
>> diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist
>> index 5355769974..92429a8d78 100644
>> --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/arm/libc.abilist b/sysdeps/unix/sysv/linux/arm/libc.abilist
>> index 9bafe71b51..bcd54ecdf5 100644
>> --- a/sysdeps/unix/sysv/linux/arm/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/arm/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist
>> index 90aa8d034f..84445a123e 100644
>> --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist
>> index 4d44c30c64..caa8dff010 100644
>> --- a/sysdeps/unix/sysv/linux/i386/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist
>> index 112fc57634..02301da334 100644
>> --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
>> index 2e8b6a4586..a3fbcb831f 100644
>> --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
>> index 3c33400f67..203a63aa27 100644
>> --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/microblaze/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
>> index e1b1a579d2..a3be97ef65 100644
>> --- a/sysdeps/unix/sysv/linux/microblaze/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/microblaze/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.18 GLIBC_2.18 A
>> GLIBC_2.18 _Exit F
>> GLIBC_2.18 _IO_2_1_stderr_ D 0x98
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
>> index c1550323f3..94de2ef489 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
>> index 3b3a172e4f..878bee4bb5 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
>> index 101ca7a241..94706fccb4 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
>> index 2d129f7170..adc3de5c88 100644
>> --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist
>> index 8bc350aff8..f6198b3dbb 100644
>> --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.21 GLIBC_2.21 A
>> GLIBC_2.21 _Exit F
>> GLIBC_2.21 _IO_2_1_stderr_ D 0x98
>> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
>> index 127c426e1c..363a3a2e10 100644
>> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
>> index a9411318e2..dfa0463282 100644
>> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
>> index d7bf5db601..37a34eb833 100644
>> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
>> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.17 GLIBC_2.17 A
>> GLIBC_2.17 _Exit F
>> GLIBC_2.17 _IO_2_1_stderr_ D 0xe0
>> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
>> index a3415a72ac..a0dbaf366a 100644
>> --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
>> index 414338f9a2..a30b304817 100644
>> --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 GLIBC_2.0 A
>> GLIBC_2.0 _IO_adjust_column F
>> GLIBC_2.0 _IO_default_doallocate F
>> diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
>> index f0f7a69b64..a759aa9cf5 100644
>> --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/sh/libc.abilist b/sysdeps/unix/sysv/linux/sh/libc.abilist
>> index 9f95aba898..133e0a55ef 100644
>> --- a/sysdeps/unix/sysv/linux/sh/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/sh/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
>> index 83fbdf2d7e..e525ed69d6 100644
>> --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.0 .div F
>> GLIBC_2.0 .mul F
>> GLIBC_2.0 .rem F
>> diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
>> index ee84ad10bc..d4fb34eceb 100644
>> --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
>> @@ -3,6 +3,8 @@ GCC_3.0 _Unwind_Find_FDE F
>> GCC_3.0 __deregister_frame_info_bases F
>> GCC_3.0 __register_frame_info_bases F
>> GCC_3.0 __register_frame_info_table_bases F
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
>> index dcbfbc05ac..f598149374 100644
>> --- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.12 GLIBC_2.12 A
>> GLIBC_2.12 _Exit F
>> GLIBC_2.12 _IO_2_1_stderr_ D 0xa0
>> diff --git a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
>> index 53dc99c45a..cb0054f532 100644
>> --- a/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.12 GLIBC_2.12 A
>> GLIBC_2.12 _Exit F
>> GLIBC_2.12 _IO_2_1_stderr_ D 0xe0
>> diff --git a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
>> index dcbfbc05ac..f598149374 100644
>> --- a/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.12 GLIBC_2.12 A
>> GLIBC_2.12 _Exit F
>> GLIBC_2.12 _IO_2_1_stderr_ D 0xa0
>> diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
>> index ae4dcaa47e..70a15fa003 100644
>> --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.10 GLIBC_2.10 A
>> GLIBC_2.10 __cxa_at_quick_exit F
>> GLIBC_2.10 __posix_getopt F
>> diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
>> index 0dbda14796..afbdec65d5 100644
>> --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
>> +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
>> @@ -1,3 +1,5 @@
>> +GLBIC_2.27 GLBIC_2.27 A
>> +GLBIC_2.27 pthread_thread_number_np F
>> GLIBC_2.16 GLIBC_2.16 A
>> GLIBC_2.16 _Exit F
>> GLIBC_2.16 _IO_2_1_stderr_ D 0xa0<div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br />
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> </td>
> </tr>
> </table><a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1"
> height="1"></a></div>