[PHP-DEV] Bug #9505 Updated: Pointer not set exception on a realloc From: andi <email protected>
Date: 04/30/01

ID: 9505
Updated by: andi
Reported By: amra <email protected>
Old-Status: Open
Status: Closed
Bug Type: Reproduceable crash
PHP Version: 4.0.4pl1
Assigned To:
Comments:

I see no reason why this would cause a crash. Why shouldn't I be able to do some pointer arithmetic in the beginning? There is no de-referencing of pointers so your machine shouldn't care. In any case, please try the latest CVS. I commited your request for change because it doesn't make a difference. Let me know if it works for you now (andi <email protected>)

Previous Comments:
---------------------------------------------------------------------------

[2001-03-09 12:42:22] amra <email protected>
Just wondering what the status of this is...

---------------------------------------------------------------------------

[2001-02-28 19:14:57] amra <email protected>
Got the PHP to compile and build, now I am doing some simple tests. On initial invocation to PHP, I get the following exception:

Message . . . . : Pointer not set for location referenced.
Cause . . . . . : A pointer was used, either directly or as a basing pointer, that has not been set to an address.
                                                                       
The exception was in c file zend_alloc.c, routine _erealloc(). The problem code is the first line:

ZEND_API void *_erealloc(void *ptr, size_t size, int allow_failure ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
      zend_mem_header *p = (zend_mem_header *) ((char *)ptr-sizeof(zend_mem_header)-PLATFORM_PADDING);
        zend_mem_header *orig = p;
    
        DECLARE_CACHE_VARS
        ALS_FETCH();

        if (!ptr) {
                return _emalloc(size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
        }
  .
  .
  .
}

The first line is referencing the pointer without checking if it is NULL. I moved the first 2 lines after the if-check and it cleared up the problem.

---------------------------------------------------------------------------

ATTENTION! Do NOT reply to this email!
To reply, use the web interface found at http://bugs.php.net/?id=9505&edit=2 

-- 
PHP Development Mailing List <http://www.php.net/>
To unsubscribe, e-mail: php-dev-unsubscribe <email protected>
For additional commands, e-mail: php-dev-help <email protected>
To contact the list administrators, e-mail: php-list-admin <email protected>