nptl/pthread_attr_setstack.c

   1 /* Copyright (C) 2002-2021 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <limits.h>
  21 #include "pthreadP.h"
  22
  23
  24 #ifndef NEW_VERNUM
  25 # define NEW_VERNUM GLIBC_2_3_3
  26 #endif
  27
  28
  29 int
  30 __pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr,
  31                          size_t stacksize)
  32 {
  33   struct pthread_attr *iattr;
  34
  35   iattr = (struct pthread_attr *) attr;
  36
  37   /* Catch invalid sizes.  */
  38   int ret = check_stacksize_attr (stacksize);
  39   if (ret)
  40     return ret;
  41
  42 #ifdef EXTRA_PARAM_CHECKS
  43   EXTRA_PARAM_CHECKS;
  44 #endif
  45
  46   iattr->stacksize = stacksize;
  47 #if _STACK_GROWS_DOWN
  48   iattr->stackaddr = (char *) stackaddr + stacksize;
  49 #else
  50   iattr->stackaddr = (char *) stackaddr;
  51 #endif
  52   iattr->flags |= ATTR_FLAG_STACKADDR;
  53
  54   return 0;
  55 }
  56
  57 #if PTHREAD_STACK_MIN == 16384
  58 strong_alias (__pthread_attr_setstack, pthread_attr_setstack)
  59 #else
  60 # include <shlib-compat.h>
  61 versioned_symbol (libpthread, __pthread_attr_setstack, pthread_attr_setstack,
  62                   NEW_VERNUM);
  63
  64 # if SHLIB_COMPAT(libpthread, GLIBC_2_2, NEW_VERNUM)
  65
  66 int
  67 __old_pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr,
  68                              size_t stacksize)
  69 {
  70   struct pthread_attr *iattr;
  71
  72   iattr = (struct pthread_attr *) attr;
  73
  74   /* Catch invalid sizes.  */
  75   if (stacksize < 16384)
  76     return EINVAL;
  77
  78 #  ifdef EXTRA_PARAM_CHECKS
  79   EXTRA_PARAM_CHECKS;
  80 #  endif
  81
  82   iattr->stacksize = stacksize;
  83 #if _STACK_GROWS_DOWN
  84   iattr->stackaddr = (char *) stackaddr + stacksize;
  85 #else
  86   iattr->stackaddr = (char *) stackaddr;
  87 #endif
  88   iattr->flags |= ATTR_FLAG_STACKADDR;
  89
  90   return 0;
  91 }
  92
  93 compat_symbol (libpthread, __old_pthread_attr_setstack, pthread_attr_setstack,
  94                GLIBC_2_2);
  95 # endif
  96
  97 #endif