PR_SET_VMA(2const)                                          PR_SET_VMA(2const)

NAME
       PR_SET_VMA - set an attribute for virtual memory areas

LIBRARY
       Standard C library (libc, -lc)

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

       int prctl(PR_SET_VMA, long attr, unsigned long addr, unsigned long size,
                 const char *_Nullable val);

DESCRIPTION
       Sets an attribute specified in attr for virtual memory areas starting
       from the address specified in addr and spanning the size specified in
       size.  val specifies the value of the attribute to be set.

       Note that assigning an attribute to a virtual memory area might prevent
       it from being merged with adjacent virtual memory areas due to the
       difference in that attribute's value.

       Currently, attr must be one of:

       PR_SET_VMA_ANON_NAME
              Set a name for anonymous virtual memory areas.  val should be a
              pointer to a null-terminated string containing the name.  The
              name length including null byte cannot exceed 80 bytes.  If val
              is NULL, the name of the appropriate anonymous virtual memory
              areas will be reset.  The name can contain only printable ascii
              characters (isprint(3)), except '[', ']', '\', '$', and '`'.

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

ERRORS
       EINVAL attr is not a valid attribute.

       EINVAL addr is an invalid address.

STANDARDS
       Linux.

HISTORY
       Linux 5.17.

SEE ALSO
       prctl(2)

Linux man-pages 6.19              2026-02-08                PR_SET_VMA(2const)