fix bug 78076 Opcache greatly increases memory usage.

[769344359]

https://bugs.php.net/bug.php?id=78076

memory will not free when

opcache.file_cache_only=1

or other special case no satisfiy follow condition

!file_cache_only &&
	    !ZCSG(restart_in_progress) &&
		!ZSMMG(memory_exhausted) &&
	    accelerator_shm_read_lock() == SUCCESS

it may import from this commit

[769344359]

the CD/CI fail seems not my problem

[dstogov]

Thanks for analysing the bug and attempt to fix.

Unfortunately, the patch is wrong.
It deallocates memory buffer that keeps different data structures that are going to be used after free.
For me, test1.php crashes on the second run (when test2 is already in file cache).

[769344359]

i found i am wrong ,it can not free the op_array ,it should cached the filename to a global hashtable when the filecache load to memory

[ramsey]

What is the status of this pull request?

If you're able to address @dstogov's concerns, please update this to use PHP-8.0 as the base branch.