nptl/pthread_attr_setstack.c

   1 /* Copyright (C) 2002-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include <errno.h>
  21 #include <limits.h>
  22 #include "pthreadP.h"
  23
  24
  25 #ifndef NEW_VERNUM
  26 # define NEW_VERNUM GLIBC_2_3_3
  27 #endif
  28
  29
  30 int
  31 __pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr,
  32                          size_t stacksize)
  33 {
  34   struct pthread_attr *iattr;
  35
  36   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
  37   iattr = (struct pthread_attr *) attr;
  38
  39   /* Catch invalid sizes.  */
  40   int ret = check_stacksize_attr (stacksize);
  41   if (ret)
  42     return ret;
  43
  44 #ifdef EXTRA_PARAM_CHECKS
  45   EXTRA_PARAM_CHECKS;
  46 #endif
  47
  48   iattr->stacksize = stacksize;
  49 #if _STACK_GROWS_DOWN
  50   iattr->stackaddr = (char *) stackaddr + stacksize;
  51 #else
  52   iattr->stackaddr = (char *) stackaddr;
  53 #endif
  54   iattr->flags |= ATTR_FLAG_STACKADDR;
  55
  56   return 0;
  57 }
  58
  59 #if PTHREAD_STACK_MIN == 16384
  60 strong_alias (__pthread_attr_setstack, pthread_attr_setstack)
  61 #else
  62 # include <shlib-compat.h>
  63 versioned_symbol (libpthread, __pthread_attr_setstack, pthread_attr_setstack,
  64                   NEW_VERNUM);
  65
  66 # if SHLIB_COMPAT(libpthread, GLIBC_2_2, NEW_VERNUM)
  67
  68 int
  69 __old_pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr,
  70                              size_t stacksize)
  71 {
  72   struct pthread_attr *iattr;
  73
  74   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
  75   iattr = (struct pthread_attr *) attr;
  76
  77   /* Catch invalid sizes.  */
  78   if (stacksize < 16384)
  79     return EINVAL;
  80
  81 #  ifdef EXTRA_PARAM_CHECKS
  82   EXTRA_PARAM_CHECKS;
  83 #  endif
  84
  85   iattr->stacksize = stacksize;
  86 #if _STACK_GROWS_DOWN
  87   iattr->stackaddr = (char *) stackaddr + stacksize;
  88 #else
  89   iattr->stackaddr = (char *) stackaddr;
  90 #endif
  91   iattr->flags |= ATTR_FLAG_STACKADDR;
  92
  93   return 0;
  94 }
  95
  96 compat_symbol (libpthread, __old_pthread_attr_setstack, pthread_attr_setstack,
  97                GLIBC_2_2);
  98 # endif
  99
 100 #endif