Bug #9505 Updated: Pointer not set exception on a realloc

ID: 9505 Updated by: andi Reported By: amra@us.ibm.com 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@zend.com) Previous Comments: --------------------------------------------------------------------------- [2001-03-09 12:42:22] amra@us.ibm.com Just wondering what the status of this is... --------------------------------------------------------------------------- [2001-02-28 19:14:57] amra@us.ibm.com 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