main/coregrind/m_aspacehl.c

/*--------------------------------------------------------------------*/
/*--- Services layered on top of m_aspacemgr.         m_aspacehl.c ---*/
/*--------------------------------------------------------------------*/

/*
   This file is part of Valgrind, a dynamic binary instrumentation
   framework.

   Copyright (C) 2006-2011 Julian Seward
      jseward@acm.org

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.

   The GNU General Public License is contained in the file COPYING.
*/

#include "pub_core_basics.h"
#include "pub_core_aspacemgr.h"
#include "pub_core_mallocfree.h"

#include "pub_core_aspacehl.h"

// Extract from aspacem a vector of the current segment start
// addresses.  The vector is dynamically allocated and should be freed
// by the caller when done.  REQUIRES m_mallocfree to be running.
// Writes the number of addresses required into *n_acquired.
Addr* VG_(get_segment_starts) ( /*OUT*/Int* n_acquired )
{
   Addr* starts;
   Int   n_starts, r = 0;

   n_starts = 1;
   while (True) {
      starts = VG_(malloc)( "main.gss.1", n_starts * sizeof(Addr) );
      if (starts == NULL)
         break;
      r = VG_(am_get_segment_starts)( starts, n_starts );
      if (r >= 0)
         break;
      VG_(free)(starts);
      n_starts *= 2;
   }

   if (starts == NULL) {
     *n_acquired = 0;
     return NULL;
   }

   *n_acquired = r;
   return starts;
}

/*--------------------------------------------------------------------*/
/*--- end                                                          ---*/
/*--------------------------------------------------------------------*/