PHP7 Zend Heap validation

Hi everyone, I am working on porting a pre-PHP7 database driver extension to PHP7 for Windows platforms. ( I am using PHP 7.0.1 master branch code and targeting non-ZTS 32 bit PHP7 on Windows Server 2012 R2 ) And currently as I did mechanical bits of porting ( compilation issues, getting functionality working mostly followed https://wiki.php.net/phpng-upgrading ) , my extension is only crash-free if I run it with USE_ZEND_ALLOC=0. However with USE_ZEND_ALLOC=1 , I am getting crashes inside zend_mm_alloc_small. As checked with Windbg : ... if (EXPECTED(heap->free_slot[bin_num] != NULL) ) { zend_mm_free_slot *p = heap->free_slot[bin_num]; if ( p->next_free_slot != NULL ) Above , p->next_free_slot is not readable. I believe , currently I am getting the Zend heap corrupt. I am running a test script and I tried disabling many things ,and enabling one by one to have an idea, from the looks of it , I am getting this issue around a zend_register_resource call but to me that one looks legitimate so I can`t easily pinpoint where the Zend heap gets corrupt. Diffrently from pre-PHP7 where we had full_mem_check , now I can see ZEND_MM_CHECK is placed in memory manager functions. I wanted to ask if there is any chance if we can have a heap integrity checker function , or what would you advise regarding to track down the places in our code corrupting the Zend MM ? Regards, Akin Ocal ________________________________ This e-mail is for the sole use of the intended recipient and contains information that may be privileged and/or confidential. If you are not an intended recipient, please notify the sender by return e-mail and delete this e-mail and any attachments. Certain required legal entity disclosures can be accessed on our website.<http://site.thomsonreuters.com/site/disclosures/>