man7.org > Linux > man-pages

Linux/UNIX system programming training

PR_GET_TID_ADDRESS(2const) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | CAVEATS | SEE ALSO | COLOPHON 

PR_GET_TID_ADDRESS(2const)                    PR_GET_TID_ADDRESS(2const)

NAME         top

       PR_GET_TID_ADDRESS - get the clear_child_tid address

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <linux/prctl.h>  /* Definition of PR_* constants */
       #include <sys/prctl.h>

       int prctl(PR_GET_TID_ADDRESS, int **addrp);

DESCRIPTION         top

       Return the clear_child_tid address set by set_tid_address(2) and
       the clone(2) CLONE_CHILD_CLEARTID flag, in the location pointed
       to by addrp.

       This feature is available only if the kernel is built with the
       CONFIG_CHECKPOINT_RESTORE option enabled.

RETURN VALUE         top

       On success, 0 is returned.  On error, -1 is returned, and errno
       is set to indicate the error.

ERRORS         top

       EFAULT addrp is an invalid address.

STANDARDS         top

       Linux.

HISTORY         top

       Linux 3.5.

CAVEATS         top

       Note that since the prctl() system call does not have a compat
       implementation for the AMD64 x32 and MIPS n32 ABIs, and the
       kernel writes out a pointer using the kernel's pointer size, this
       operation expects a user-space buffer of 8 (not 4) bytes on these
       ABIs.

SEE ALSO         top

       prctl(2)

COLOPHON         top

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       [email protected]

Linux man-pages 6.9.1          2024-06-02     PR_GET_TID_ADDRESS(2const)

Pages that refer to this page: prctl(2)

HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface.

For details of in-depth Linux/UNIX system programming training courses that I teach, look here.

Hosting by jambit GmbH.

Cover of TLPI