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/*
* Copyright (C) 2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2013 John Emmas <john@creativepost.co.uk>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef DEBUG_RT_ALLOC
#define _GNU_SOURCE
#include <dlfcn.h>
#include <stdio.h>
#include <stdlib.h>
#include "pbd/pthread_utils.h"
int (*pbd_alloc_allowed) () = 0;
/** Thread-local key whose value is set to 1 if malloc checking is disabled
* for this thread, 0 otherwise.
*/
static pthread_key_t disabled;
static pthread_once_t once;
static void
make_key (void)
{
(void) pthread_key_create (&disabled, NULL);
}
/** This is our malloc which overrides the system one */
void* malloc (size_t s)
{
static void * (*real_malloc) (size_t) = NULL;
if (!real_malloc) {
/* find the system malloc */
real_malloc = dlsym (RTLD_NEXT, "malloc");
}
(void) pthread_once (&once, make_key);
if (pthread_getspecific (disabled) == NULL && pbd_alloc_allowed && !pbd_alloc_allowed ()) {
/* pbd_alloc_allowed says that this malloc is not permitted */
abort ();
}
/* Pass through to the system malloc */
return real_malloc (s);
}
void
suspend_rt_malloc_checks ()
{
(void) pthread_once (&once, make_key);
pthread_setspecific (disabled, (void *) 1);
}
void
resume_rt_malloc_checks ()
{
(void) pthread_once (&once, make_key);
pthread_setspecific (disabled, (void *) 0);
}
#endif
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