pthread_attr_getstack(3) — Linux manual page



NAME         top

       pthread_attr_setstack,  pthread_attr_getstack  -  set/get  stack  at‐
       tributes in thread attributes object

SYNOPSIS         top

       #include <pthread.h>

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

DESCRIPTION         top

       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,

RETURN VALUE         top

       On success, these functions return 0; on error, they return a nonzero
       error number.

ERRORS         top

       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
              stackaddr + stacksize is not suitably aligned.

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

VERSIONS         top

       These functions are provided by glibc since version 2.2.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see

       │Interface                Attribute     Value   │
       │pthread_attr_setstack(), │ Thread safety │ MT-Safe │
       │pthread_attr_getstack()  │               │         │

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008.

NOTES         top

       These functions are provided for applications that must ensure that a
       thread's stack is placed in a particular location.  For most
       applications, this is not necessary, and the use of these functions
       should be avoided.  (Use pthread_attr_setstacksize(3) if an
       application simply requires a stack size other than the default.)

       When an application employs pthread_attr_setstack(), it takes over
       the responsibility of allocating the stack.  Any guard size value
       that was set using pthread_attr_setguardsize(3) is ignored.  If
       deemed necessary, it is the application's responsibility to allocate
       a guard area (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); otherwise, the threads will attempt to use the
       same memory area for their stacks, and chaos will ensue.

EXAMPLES         top

       See pthread_attr_init(3).

SEE ALSO         top

       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         top

       This page is part of release 5.09 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at

Linux                            2020-06-09         PTHREAD_ATTR_SETSTACK(3)

Pages that refer to this page: pthread_attr_getstackaddr(3)pthread_attr_setstackaddr(3)pthread_getattr_default_np(3)pthread_getattr_np(3)pthread_setattr_default_np(3)