From patchwork Fri Feb 8 12:29:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Weimer X-Patchwork-Id: 31355 Received: (qmail 74369 invoked by alias); 8 Feb 2019 12:29:28 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 74359 invoked by uid 89); 8 Feb 2019 12:29:28 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-26.9 required=5.0 tests=BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_SHORT, SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=identification, Identification X-HELO: mx1.redhat.com From: Florian Weimer To: libc-alpha@sourceware.org Subject: [PATCH] Linux: Add pthread_tid_np function Date: Fri, 08 Feb 2019 13:29:21 +0100 Message-ID: <87ftsympjy.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 For applications that use futexes or want short thread IDs for log files, it is useful to have access to the TID without going through a system call. The patch below adds a function called pthread_current_tid_np which does this. Alternatively, we could add a function like gettid_cached to , next to gettid. Do you think this functionality is useful? Thanks, Florian 2019-01-08 Florian Weimer Linux: Add pthread_current_tid_np function. * nptl/Makefile (routines): Add pthread_current_tid_np. * nptl/Versions (GLIBC_2.30): Export pthread_current_tid_np. * nptl/pthread_current_tid_np.c: New file. * sysdeps/nptl/pthread.h [__USE_GNU] (pthread_current_tid_np): Declare. * sysdeps/unix/sysv/linux/bits/unistd_ext.h (gettid): Update comment. * manual/process.texi (Process Identification): Document pthread_current_tid_np. * sysdeps/unix/sysv/linux/tst-gettid.c (subprocess, threadfunc) (test_vfork, do_test): Add checks for pthread_current_tid_np. * sysdeps/unix/sysv/linux/aarch64/libc.abilist (GLIBC_2.30): Add pthread_current_tid_np * sysdeps/unix/sysv/linux/alpha/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/arm/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/csky/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/hppa/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/i386/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/ia64/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/microblaze/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/nios2/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sh/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/64/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist (GLIBC_2.30): Likewise. * sysdeps/unix/sysv/linux/tst-setgetname.c (gettid): Remove. diff --git a/NEWS b/NEWS index 0a3b6c7a5a..cae228e45e 100644 --- a/NEWS +++ b/NEWS @@ -12,7 +12,7 @@ Major new features: * The dynamic linker accepts the --preload argument to preload shared objects, in addition to the LD_PRELOAD environment variable. -* On Linux, the gettid function has been added. +* On Linux, the gettid and pthread_current_tid_np function have been added. Deprecated and removed features, and other changes affecting compatibility: diff --git a/manual/process.texi b/manual/process.texi index 5728bde2cb..d0cb36f33f 100644 --- a/manual/process.texi +++ b/manual/process.texi @@ -236,6 +236,21 @@ thread. The returned value is obtained from the Linux kernel and is not subject to caching. See the discussion of thread IDs above, especially regarding reuse of the IDs of threads which have exited. +The @code{pthread_current_tid_np} function below uses caching and is +therefore faster. + +This function is specific to Linux. +@end deftypefun + +@deftypefun pid_t pthread_current_tid_np (void) +@standards{Linux, pthread.h} +@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} +The @code{pthread_current_tid_np} function returns the cached thread +ID of the current thread. It is faster than the @code{gettid} +function. However, it will return incorrect results in the new +subprocess after a call to the @code{vfork} function or direct system +calls which created subprocesses. + This function is specific to Linux. @end deftypefun diff --git a/nptl/Makefile b/nptl/Makefile index 0e316edfac..0bdd5742f2 100644 --- a/nptl/Makefile +++ b/nptl/Makefile @@ -30,7 +30,7 @@ extra-libs-others := $(extra-libs) routines = alloca_cutoff forward libc-lowlevellock libc-cancellation \ libc-cleanup libc_pthread_init libc_multiple_threads \ register-atfork pthread_atfork pthread_self thrd_current \ - thrd_equal thrd_sleep thrd_yield + thrd_equal thrd_sleep thrd_yield pthread_current_tid_np shared-only-routines = forward static-only-routines = pthread_atfork diff --git a/nptl/Versions b/nptl/Versions index e7f691da7a..eff6419329 100644 --- a/nptl/Versions +++ b/nptl/Versions @@ -32,6 +32,9 @@ libc { GLIBC_2.28 { thrd_current; thrd_equal; thrd_sleep; thrd_yield; } + GLIBC_2.30 { + pthread_current_tid_np; + } GLIBC_PRIVATE { __libc_alloca_cutoff; # Internal libc interface to libpthread diff --git a/nptl/pthread_current_tid_np.c b/nptl/pthread_current_tid_np.c new file mode 100644 index 0000000000..7631093b11 --- /dev/null +++ b/nptl/pthread_current_tid_np.c @@ -0,0 +1,26 @@ +/* Cached access to the kernel TID. + Copyright (C) 2019 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 + . */ + +#include +#include + +__pid_t +pthread_current_tid_np (void) +{ + return THREAD_GETMEM (THREAD_SELF, tid); +} diff --git a/sysdeps/nptl/pthread.h b/sysdeps/nptl/pthread.h index 704a3c48d6..7c618325ad 100644 --- a/sysdeps/nptl/pthread.h +++ b/sysdeps/nptl/pthread.h @@ -275,6 +275,15 @@ extern int pthread_detach (pthread_t __th) __THROW; /* Obtain the identifier of the current thread. */ extern pthread_t pthread_self (void) __THROW __attribute__ ((__const__)); +#ifdef __USE_GNU +/* Return the kernel TID of the current thread. This value is cached + and will therefore be incorrect after vfork and system calls which + alter the kernel TID (such as clone). See gettid for a non-cached + version. The same limitations regarding TID reuse apply to this + function. */ +extern __pid_t pthread_current_tid_np (void) __THROW __attribute__ ((__const__)); +#endif + /* Compare two thread identifiers. */ extern int pthread_equal (pthread_t __thread1, pthread_t __thread2) __THROW __attribute__ ((__const__)); diff --git a/sysdeps/unix/sysv/linux/aarch64/libc.abilist b/sysdeps/unix/sysv/linux/aarch64/libc.abilist index f3b44d723f..6ad2aef855 100644 --- a/sysdeps/unix/sysv/linux/aarch64/libc.abilist +++ b/sysdeps/unix/sysv/linux/aarch64/libc.abilist @@ -2142,3 +2142,4 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F diff --git a/sysdeps/unix/sysv/linux/alpha/libc.abilist b/sysdeps/unix/sysv/linux/alpha/libc.abilist index fe0de20b2b..a6521b0b3a 100644 --- a/sysdeps/unix/sysv/linux/alpha/libc.abilist +++ b/sysdeps/unix/sysv/linux/alpha/libc.abilist @@ -2205,6 +2205,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/arm/libc.abilist b/sysdeps/unix/sysv/linux/arm/libc.abilist index f451fefac9..62b6cd0099 100644 --- a/sysdeps/unix/sysv/linux/arm/libc.abilist +++ b/sysdeps/unix/sysv/linux/arm/libc.abilist @@ -127,6 +127,7 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0xa0 GLIBC_2.4 _IO_2_1_stdin_ D 0xa0 diff --git a/sysdeps/unix/sysv/linux/bits/unistd_ext.h b/sysdeps/unix/sysv/linux/bits/unistd_ext.h index 0061172f23..e9825bbc81 100644 --- a/sysdeps/unix/sysv/linux/bits/unistd_ext.h +++ b/sysdeps/unix/sysv/linux/bits/unistd_ext.h @@ -30,7 +30,8 @@ directly that have not been created explicitly). Note that a TID uniquely identifies a thread only while this thread is running; a TID can be reused once a thread has exited, even if the thread is - not detached and has not been joined. */ + not detached and has not been joined. See pthread_current_tid_np + in for a caching variant of this function. */ extern __pid_t gettid (void) __THROW; #endif diff --git a/sysdeps/unix/sysv/linux/csky/libc.abilist b/sysdeps/unix/sysv/linux/csky/libc.abilist index 018d02b414..38898df816 100644 --- a/sysdeps/unix/sysv/linux/csky/libc.abilist +++ b/sysdeps/unix/sysv/linux/csky/libc.abilist @@ -2086,3 +2086,4 @@ GLIBC_2.29 xencrypt F GLIBC_2.29 xprt_register F GLIBC_2.29 xprt_unregister F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F diff --git a/sysdeps/unix/sysv/linux/hppa/libc.abilist b/sysdeps/unix/sysv/linux/hppa/libc.abilist index fc3c5d5c27..40a247d27f 100644 --- a/sysdeps/unix/sysv/linux/hppa/libc.abilist +++ b/sysdeps/unix/sysv/linux/hppa/libc.abilist @@ -2038,6 +2038,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/i386/libc.abilist b/sysdeps/unix/sysv/linux/i386/libc.abilist index f2b04dbbff..f4fefe6fd6 100644 --- a/sysdeps/unix/sysv/linux/i386/libc.abilist +++ b/sysdeps/unix/sysv/linux/i386/libc.abilist @@ -2204,6 +2204,7 @@ GLIBC_2.3.4 vm86 F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/ia64/libc.abilist b/sysdeps/unix/sysv/linux/ia64/libc.abilist index 10ecf2e47c..2a9ae7221c 100644 --- a/sysdeps/unix/sysv/linux/ia64/libc.abilist +++ b/sysdeps/unix/sysv/linux/ia64/libc.abilist @@ -2070,6 +2070,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist index 814e81b9d2..3dc6eb7141 100644 --- a/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist @@ -128,6 +128,7 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _Exit F GLIBC_2.4 _IO_2_1_stderr_ D 0x98 GLIBC_2.4 _IO_2_1_stdin_ D 0x98 diff --git a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist index 68e80372e7..a2cdf2a213 100644 --- a/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist +++ b/sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist @@ -2147,6 +2147,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/microblaze/libc.abilist b/sysdeps/unix/sysv/linux/microblaze/libc.abilist index 31178e4f54..f617405fcb 100644 --- a/sysdeps/unix/sysv/linux/microblaze/libc.abilist +++ b/sysdeps/unix/sysv/linux/microblaze/libc.abilist @@ -2134,3 +2134,4 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist index 7074573638..3de469d04f 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist @@ -2121,6 +2121,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist index 154f9c77fc..27c1b93c67 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist @@ -2119,6 +2119,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist index 97b8f42d5c..2e8af74257 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist @@ -2127,6 +2127,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist index 5b3e85de93..4f1dee06e8 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist +++ b/sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist @@ -2121,6 +2121,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/nios2/libc.abilist b/sysdeps/unix/sysv/linux/nios2/libc.abilist index 04a130a81c..0aa23044ba 100644 --- a/sysdeps/unix/sysv/linux/nios2/libc.abilist +++ b/sysdeps/unix/sysv/linux/nios2/libc.abilist @@ -2175,3 +2175,4 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist index d99a835544..da54fbbf99 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist @@ -2165,6 +2165,7 @@ GLIBC_2.3.4 swapcontext F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist index 826772777a..5569520db3 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist @@ -2198,6 +2198,7 @@ GLIBC_2.3.4 swapcontext F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist index 5aa038971b..e3c841f8fa 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist @@ -2028,6 +2028,7 @@ GLIBC_2.3.4 swapcontext F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist index c630d0c37d..af395be229 100644 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist +++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist @@ -2232,3 +2232,4 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F diff --git a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist index da123d3867..d24577604e 100644 --- a/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist +++ b/sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist @@ -2104,3 +2104,4 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist index 361240400c..ee961dd29c 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist @@ -2160,6 +2160,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist index f44f178a08..93cc4349ba 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist +++ b/sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist @@ -2064,6 +2064,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/sh/libc.abilist b/sysdeps/unix/sysv/linux/sh/libc.abilist index 24a8f934cb..6116e166bc 100644 --- a/sysdeps/unix/sysv/linux/sh/libc.abilist +++ b/sysdeps/unix/sysv/linux/sh/libc.abilist @@ -2042,6 +2042,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist index 37957959e2..7c7f5951a6 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist @@ -2154,6 +2154,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 _IO_fprintf F GLIBC_2.4 _IO_printf F GLIBC_2.4 _IO_sprintf F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist index 0992349b06..1d12ee0002 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist @@ -2093,6 +2093,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/tst-gettid.c b/sysdeps/unix/sysv/linux/tst-gettid.c index 26b579e1a1..741756e89d 100644 --- a/sysdeps/unix/sysv/linux/tst-gettid.c +++ b/sysdeps/unix/sysv/linux/tst-gettid.c @@ -30,6 +30,7 @@ subprocess (void *closure) { TEST_COMPARE (getpid (), gettid ()); TEST_VERIFY (gettid () != initial_tid); + TEST_COMPARE (gettid (), pthread_current_tid_np ()); } /* Check that the TID changes in a new thread. */ @@ -38,6 +39,7 @@ threadfunc (void *closure) { TEST_VERIFY (getpid () != gettid ()); TEST_VERIFY (gettid () != initial_tid); + TEST_COMPARE (gettid (), pthread_current_tid_np ()); return NULL; } @@ -52,6 +54,9 @@ test_vfork (void) _exit (1); if (gettid () == initial_tid) _exit (2); + /* Verify that the cached TID has not changed. */ + if (pthread_current_tid_np () != initial_tid) + _exit (3); _exit (0); } int status; @@ -66,6 +71,7 @@ do_test (void) /* The main thread has the same TID as the PID. */ TEST_COMPARE (getpid (), gettid ()); + TEST_COMPARE (gettid (), pthread_current_tid_np ()); test_vfork (); diff --git a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist index af004fcff6..77f9c7e164 100644 --- a/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/64/libc.abilist @@ -2051,6 +2051,7 @@ GLIBC_2.3.4 setsourcefilter F GLIBC_2.3.4 xdr_quad_t F GLIBC_2.3.4 xdr_u_quad_t F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F GLIBC_2.4 __confstr_chk F GLIBC_2.4 __fgets_chk F GLIBC_2.4 __fgets_unlocked_chk F diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist index 84015f0a57..22b90fe312 100644 --- a/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist +++ b/sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist @@ -2150,3 +2150,4 @@ GLIBC_2.29 getcpu F GLIBC_2.29 posix_spawn_file_actions_addchdir_np F GLIBC_2.29 posix_spawn_file_actions_addfchdir_np F GLIBC_2.30 gettid F +GLIBC_2.30 pthread_current_tid_np F