80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
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* Copyright (C) 2011 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2013 John Emmas <john@creativepost.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef DEBUG_RT_ALLOC
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#define _GNU_SOURCE
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "pbd/pthread_utils.h"
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int (*pbd_alloc_allowed) () = 0;
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/** Thread-local key whose value is set to 1 if malloc checking is disabled
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* for this thread, 0 otherwise.
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*/
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static pthread_key_t disabled;
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static pthread_once_t once;
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static void
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make_key (void)
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{
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(void) pthread_key_create (&disabled, NULL);
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}
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/** This is our malloc which overrides the system one */
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void* malloc (size_t s)
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{
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static void * (*real_malloc) (size_t) = NULL;
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if (!real_malloc) {
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/* find the system malloc */
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real_malloc = dlsym (RTLD_NEXT, "malloc");
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}
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(void) pthread_once (&once, make_key);
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if (pthread_getspecific (disabled) == NULL && pbd_alloc_allowed && !pbd_alloc_allowed ()) {
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/* pbd_alloc_allowed says that this malloc is not permitted */
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abort ();
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}
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/* Pass through to the system malloc */
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return real_malloc (s);
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}
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void
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suspend_rt_malloc_checks ()
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{
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(void) pthread_once (&once, make_key);
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pthread_setspecific (disabled, (void *) 1);
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}
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void
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resume_rt_malloc_checks ()
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{
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(void) pthread_once (&once, make_key);
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pthread_setspecific (disabled, (void *) 0);
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}
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#endif
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