If this is your problem maybe a "offical" soultion to the problem should be
thought. Like in your extension you can define a priority for loading and
unloading your extension in the ini. Kinda like init.d.
Has there been any discussion about this topic before.
- brad
--- Brian France <[EMAIL PROTECTED]> wrote:
> Zend Engine unloading extension in the wrong order! (Re-post due to
> no response)
>
> I have been tracking down a core dump with my php extension when it
> is unloading some of its shared libraries. I have shared extension
> that is link against libexpat and will load fine if it is the only on
> in the php.ini. If I then load xml.so extension then my extension it
> works fine, but if it is my extension then xml.so it crashes while
> xml.so is unloading libexapt.
>
> What I have found is the Zend Engine is unloading extension in the
> same order it loaded them.
>
> load: foo_bar.so
> load: xml.so
>
> unload: foo_bar.so
> unload: xml.so
>
> I believe this is wrong and think it should be in reverse order.
>
> load: foo_bar.so
> load: xml.so
>
> unload: xml.so
> unload: foo_bar.so
>
>
> There are two ways to fix this problem. One is to push the modules
> to the head of the hash, but looking at the zend_hash_add function I
> decided to go with the second. Second way is to destroy them in
> reverse order. I created a zend_hash_reverse_destroy and call that
> instead of zend_hash_destroy. There may be a better way to do this,
> but this is the quick fix for me.
>
> I have included a patch below, should I submit a bug report as well?
>
> Thanks,
>
> Brian
>
>
> diff -rc php-4.2.1/Zend/zend.c
> *** php-4.2.1/Zend/zend.c Tue Feb 26 10:59:25 2002
> --- php-4.2.1/Zend/zend.c Thu Jun 6 11:32:57 2002
> ***************
> *** 487,493 ****
> zend_destroy_rsrc_list(&EG(persistent_list) TSRMLS_CC);
> #endif
> zend_destroy_rsrc_list_dtors();
> ! zend_hash_destroy(&module_registry);
> zend_hash_destroy(GLOBAL_FUNCTION_TABLE);
> free(GLOBAL_FUNCTION_TABLE);
> zend_hash_destroy(GLOBAL_CLASS_TABLE);
> --- 487,493 ----
> zend_destroy_rsrc_list(&EG(persistent_list) TSRMLS_CC);
> #endif
> zend_destroy_rsrc_list_dtors();
> ! zend_hash_reverse_destroy(&module_registry);
> zend_hash_destroy(GLOBAL_FUNCTION_TABLE);
> free(GLOBAL_FUNCTION_TABLE);
> zend_hash_destroy(GLOBAL_CLASS_TABLE);
> diff -rc php-4.2.1/Zend/zend_hash.c
> *** php-4.2.1/Zend/zend_hash.c Mon Apr 22 23:53:26 2002
> --- php-4.2.1/Zend/zend_hash.c Thu Jun 6 11:32:57 2002
> ***************
> *** 550,555 ****
> --- 550,579 ----
> SET_INCONSISTENT(HT_DESTROYED);
> }
>
> + ZEND_API void zend_hash_reverse_destroy(HashTable *ht)
> + {
> + Bucket *p, *q;
> +
> + IS_CONSISTENT(ht);
> +
> + SET_INCONSISTENT(HT_IS_DESTROYING);
> +
> + p = ht->pListTail;
> + while (p != NULL) {
> + q = p;
> + p = p->pLast;
> + if (ht->pDestructor) {
> + ht->pDestructor(q->pData);
> + }
> + if (!q->pDataPtr && q->pData) {
> + pefree(q->pData, ht->persistent);
> + }
> + pefree(q, ht->persistent);
> + }
> + pefree(ht->arBuckets, ht->persistent);
> +
> + SET_INCONSISTENT(HT_DESTROYED);
> + }
>
> ZEND_API void zend_hash_clean(HashTable *ht)
> {
>
> --
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