memory_limit.c

/*
  +----------------------------------------------------------------------+
  | Suhosin Version 1                                                    |
  +----------------------------------------------------------------------+
  | Copyright (c) 2006-2007 The Hardened-PHP Project                     |
  | Copyright (c) 2007-2014 SektionEins GmbH                             |
  +----------------------------------------------------------------------+
  | This source file is subject to version 3.01 of the PHP license,      |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | http://www.php.net/license/3_01.txt                                  |
  | If you did not receive a copy of the PHP license and are unable to   |
  | obtain it through the world-wide-web, please send a note to          |
  | license@php.net so we can mail you a copy immediately.               |
  +----------------------------------------------------------------------+
  | Author: Stefan Esser <sesser@sektioneins.de>                         |
  +----------------------------------------------------------------------+
*/
/*
  $Id: memory_limit.c,v 1.1.1.1 2007-11-28 01:15:35 sesser Exp $ 
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_suhosin.h"


/* {{{ PHP_INI_MH
 */
static PHP_INI_MH(suhosin_OnChangeMemoryLimit)
{
#if SIZEOF_LONG==8
	long hard_memory_limit = 0x7fffffffffffffff;
#elif SIZEOF_LONG==4
	long hard_memory_limit = 0x7fffffff;
#endif /* will produce a compile error or SIZEOF_LONG is not 4 or 8 */
	if (stage == ZEND_INI_STAGE_RUNTIME) {
		if (SUHOSIN_G(memory_limit) > 0) {
			SUHOSIN_G(hard_memory_limit) = SUHOSIN_G(memory_limit);
		} else if (SUHOSIN_G(hard_memory_limit) == 0) {
			SUHOSIN_G(hard_memory_limit) = PG(memory_limit);
		}
		hard_memory_limit = SUHOSIN_G(hard_memory_limit);
	} else {
		SUHOSIN_G(hard_memory_limit) = 0;
	}
	if (new_value) {
		PG(memory_limit) = zend_atol(new_value, new_value_length);
		if (hard_memory_limit > 0) {
			if (PG(memory_limit) > hard_memory_limit) {
				suhosin_log(S_MISC, "script tried to increase memory_limit to %lu bytes which is above the allowed value", PG(memory_limit));
				if (!SUHOSIN_G(simulation)) {
					PG(memory_limit) = hard_memory_limit;
					return FAILURE;
				}
			} else if (PG(memory_limit) < 0) {
				suhosin_log(S_MISC, "script tried to disable memory_limit by setting it to a negative value %ld bytes which is not allowed", PG(memory_limit));
				if (!SUHOSIN_G(simulation)) {
					PG(memory_limit) = hard_memory_limit;
					return FAILURE;
				}
			}
		}
	} else {
		PG(memory_limit) = hard_memory_limit;
	}
	return zend_set_memory_limit(PG(memory_limit));
}
/* }}} */


void suhosin_hook_memory_limit()
{
	zend_ini_entry *ini_entry;
	TSRMLS_FETCH();

	/* check if we are compiled against memory_limit */
	if (zend_hash_find(EG(ini_directives), "memory_limit", sizeof("memory_limit"), (void **) &ini_entry)==FAILURE) {
		return;
	}
	
	/* replace OnUpdateMemoryLimit handler */
	ini_entry->on_modify = suhosin_OnChangeMemoryLimit;
}


/*
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 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: noet sw=4 ts=4 fdm=marker
 * vim<600: noet sw=4 ts=4
 */