libitm/alloc_c.cc

   1 /* Copyright (C) 2009-2019 Free Software Foundation, Inc.
   2    Contributed by Richard Henderson <rth@redhat.com>.
   3
   4    This file is part of the GNU Transactional Memory Library (libitm).
   5
   6    Libitm is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
  12    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14    more details.
  15
  16    Under Section 7 of GPL version 3, you are granted additional
  17    permissions described in the GCC Runtime Library Exception, version
  18    3.1, as published by the Free Software Foundation.
  19
  20    You should have received a copy of the GNU General Public License and
  21    a copy of the GCC Runtime Library Exception along with this program;
  22    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23    <http://www.gnu.org/licenses/>.  */
  24
  25 #include "libitm_i.h"
  26
  27
  28 using namespace GTM;
  29
  30 extern "C" {
  31
  32 /* Wrap: malloc (size_t sz)  */
  33 void *
  34 _ITM_malloc (size_t sz)
  35 {
  36   void *r = malloc (sz);
  37   if (r)
  38     gtm_thr()->record_allocation (r, free);
  39   return r;
  40 }
  41
  42 /* Wrap: calloc (size_t nm, size_t sz)  */
  43 void *
  44 _ITM_calloc (size_t nm, size_t sz)
  45 {
  46   void *r = calloc (nm, sz);
  47   if (r)
  48     gtm_thr()->record_allocation (r, free);
  49   return r;
  50 }
  51
  52 /* Wrap:  free (void *ptr)  */
  53 void
  54 _ITM_free (void *ptr)
  55 {
  56   if (ptr)
  57     gtm_thr()->forget_allocation (ptr, free);
  58 }
  59
  60 /* Forget any internal references to PTR.  */
  61
  62 __attribute__((transaction_pure))
  63 void ITM_REGPARM
  64 _ITM_dropReferences (void *ptr, size_t len)
  65 {
  66   // The semantics of _ITM_dropReferences are not sufficiently defined in the
  67   // ABI specification, so it does not make sense to support it right now. See
  68   // the libitm documentation for details.
  69   GTM_fatal("_ITM_dropReferences is not supported");
  70 }
  71
  72 } // extern "C"