in thread attributes object

SYNOPSIS
       #include <pthread.h>

       int pthread_attr_setstack(pthread_attr_t *attr,
                                 void *stackaddr, size_t stacksize);
       int pthread_attr_getstack(pthread_attr_t *attr,
                                 void **stackaddr, size_t *stacksize);

       Compile and link with -pthread.

   feature test macro requirements for glibc (see feature_test_macros(7)):

       pthread_attr_getstack(), pthread_attr_setstack():
       _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600

DESCRIPTION
       The  pthread_attr_setstack()  function sets the stack address and stack
       size attributes of the thread attributes object referred to by attr  to
       the  values  specified in stackaddr and stacksize, respectively.  These
       attributes specify the location and size of the stack  that  should  be
       used  by  a  thread  that is created using the thread attributes object
       attr.

       stackaddr should point to the lowest addressable byte of  a  buffer  of
       stacksize  bytes  that  was  allocated by the caller.  The pages of the
       allocated buffer should be both readable and writable.

       The pthread_attr_getstack() function  returns  the  stack  address  and
       stack  size  attributes  of the thread attributes object referred to by
       attr in the buffers pointed to  by  stackaddr  and  stacksize,  respec-
       tively.

RETURN VALUE
       On  success, these functions return 0; on error, they return a non-zero
       error number.

ERRORS
       pthread_attr_setstack() can fail with the following error:

       EINVAL stacksize is less than PTHREAD_STACK_MIN (16384) bytes.  On some
              systems,  this  error  may  also  occur  if  stackaddr or stack-
              addr + stacksize is not suitably aligned.

       POSIX.1-2001 also documents an EACCES error if the stack area described
       by  stackaddr  and  stacksize  is not both readable and writable by the
       caller.

VERSIONS
       These functions are provided by glibc since version 2.2.

CONFORMING TO
       POSIX.1-2001.
       (one or more pages protected against reading and writing) to handle the
       possibility of stack overflow.

       The address specified in stackaddr should be suitably aligned: for full
       portability, align  it  on  a  page  boundary  (sysconf(_SC_PAGESIZE)).
       posix_memalign(3)  may  be  useful for allocation.  probably, stacksize
       should also be a multiple of the system page size.

       If attr is used to create multiple threads, then the caller must change
       the  stack address attribute between calls to pthread_create(3); other-
       wise, the threads will attempt to use the same memory  area  for  their
       stacks, and chaos will ensue.

EXAMPLE
       see pthread_attr_init(3).

SEE ALSO
       mmap(2),    mprotect(2),    posix_memalign(3),    pthread_attr_init(3),
       pthread_attr_setguardsize(3),             pthread_attr_setstackaddr(3),
       pthread_attr_setstacksize(3), pthread_create(3), pthreads(7)

COLOPHON
       This  page  is  part of release 3.23 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.