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       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 <error.h>
      35                 :            : #include <errno.h>
      36                 :            : #include <stdlib.h>
      37                 :            : #include <sys/param.h>
      38                 :            : #include "libdwP.h"
      39                 :            : 
      40                 :            : 
      41                 :            : void *
      42                 :      12245 : __libdw_allocate (Dwarf *dbg, size_t minsize, size_t align)
      43                 :            : {
      44                 :      12245 :   size_t size = MAX (dbg->mem_default_size,
      45                 :            :                      (align - 1 +
      46                 :            :                       2 * minsize + offsetof (struct libdw_memblock, mem)));
      47                 :      12245 :   struct libdw_memblock *newp = malloc (size);
      48         [ -  + ]:      12245 :   if (newp == NULL)
      49                 :          0 :     dbg->oom_handler ();
      50                 :            : 
      51                 :      12245 :   uintptr_t result = ((uintptr_t) newp->mem + align - 1) & ~(align - 1);
      52                 :            : 
      53                 :      12245 :   newp->size = size - offsetof (struct libdw_memblock, mem);
      54                 :      12245 :   newp->remaining = (uintptr_t) newp + size - (result + minsize);
      55                 :            : 
      56                 :      12245 :   newp->prev = dbg->mem_tail;
      57                 :      12245 :   dbg->mem_tail = newp;
      58                 :            : 
      59                 :      12245 :   return (void *) result;
      60                 :            : }
      61                 :            : 
      62                 :            : 
      63                 :            : Dwarf_OOM
      64                 :          0 : dwarf_new_oom_handler (Dwarf *dbg, Dwarf_OOM handler)
      65                 :            : {
      66                 :          0 :   Dwarf_OOM old = dbg->oom_handler;
      67                 :          0 :   dbg->oom_handler = handler;
      68                 :          0 :   return old;
      69                 :            : }
      70                 :            : 
      71                 :            : 
      72                 :            : void
      73                 :            : __attribute ((noreturn, visibility ("hidden")))
      74                 :          0 : __libdw_oom (void)
      75                 :            : {
      76                 :            :   while (1)
      77                 :            :     error (EXIT_FAILURE, ENOMEM, "libdw");
      78                 :            : }