plucky (2) PR_GET_TID_ADDRESS.2const.gz

Provided by: manpages-dev_6.9.1-1_all bug

NAME
       PR_GET_TID_ADDRESS - get the clear_child_tid address


LIBRARY
       Standard C library (libc, -lc)


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

       int prctl(PR_GET_TID_ADDRESS, int **addrp);


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


ERRORS
       EFAULT addrp is an invalid address.


STANDARDS
       Linux.


HISTORY
       Linux 3.5.


CAVEATS
       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
       prctl(2)