Line data    Source code

       1             : /* Memory handling for libdw.
       2             :    Copyright (C) 2003, 2004, 2006 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2003.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <errno.h>
      35             : #include <stdlib.h>
      36             : #include "libdwP.h"
      37             : #include "system.h"
      38             : 
      39             : 
      40             : void *
      41       14052 : __libdw_allocate (Dwarf *dbg, size_t minsize, size_t align)
      42             : {
      43       14052 :   size_t size = MAX (dbg->mem_default_size,
      44             :                      (align - 1 +
      45             :                       2 * minsize + offsetof (struct libdw_memblock, mem)));
      46       14052 :   struct libdw_memblock *newp = malloc (size);
      47       14052 :   if (newp == NULL)
      48           0 :     dbg->oom_handler ();
      49             : 
      50       14052 :   uintptr_t result = ((uintptr_t) newp->mem + align - 1) & ~(align - 1);
      51             : 
      52       14052 :   newp->size = size - offsetof (struct libdw_memblock, mem);
      53       14052 :   newp->remaining = (uintptr_t) newp + size - (result + minsize);
      54             : 
      55       14052 :   newp->prev = dbg->mem_tail;
      56       14052 :   dbg->mem_tail = newp;
      57             : 
      58       14052 :   return (void *) result;
      59             : }
      60             : 
      61             : 
      62             : Dwarf_OOM
      63           0 : dwarf_new_oom_handler (Dwarf *dbg, Dwarf_OOM handler)
      64             : {
      65           0 :   Dwarf_OOM old = dbg->oom_handler;
      66           0 :   dbg->oom_handler = handler;
      67           0 :   return old;
      68             : }
      69             : 
      70             : 
      71             : void
      72             : __attribute ((noreturn)) attribute_hidden
      73           0 : __libdw_oom (void)
      74             : {
      75             :   while (1)
      76             :     error (EXIT_FAILURE, ENOMEM, "libdw");
      77             : }