On Thu, Jun 21, 2012 at 11:39 AM, Yader Hernandez
<yader.hernan...@gmail.com> wrote:
> I'm trying to reverse an array but I keep getting bizarre results, such as
> seg faults
>
> 0x00000000006d0940 in gc_remove_from_buffer (zv=0x7fffffffb550) at
> /home/yaderbh/php-5.4.3/Zend/zend_gc.h:189
> 189 root->next->prev = root->prev;
>
> or I'll get "PHP Fatal error: Allowed memory size of" errors when trying
> to manipulate the array in a script.
>
> Basically what I'm doing is creating a pointer to zval, allocating and
> creating the zval into an array, traversing the existing array and
> calling add_index_zval. The position of the index is the current size and
> work my way down.
>
>
> hash_table = Z_ARRVAL_P(intern->elements);
>
>
>
> ALLOC_INIT_ZVAL(new_elements);
>
> array_init(new_elements);
>
>
>
> zend_hash_internal_pointer_reset_ex(hash_table, &pos);
>
>
>
> i = intern->size;
>
>
>
> while (zend_hash_get_current_data_ex(hash_table, (void **)¤t,
> &pos) == SUCCESS) {
> tmp = **current;
Hi:
tmp is a stack allocted variable. when this scope is dead, *(&tmp)
is undefined value.
you should use a heap allocated variable, or just add_ref the current zval
thanks
>
>
>
> zval_copy_ctor(&tmp);
>
>
>
> add_index_zval(new_elements, i, &tmp);
>
> i--;
>
>
>
> zend_hash_move_forward_ex(hash_table, &pos);
>
> }
>
>
>
> zval_ptr_dtor(&intern->elements);
>
>
>
> intern->elements = new_elements;
>
>
> Can anyone spot the problem?
--
Laruence Xinchen Hui
http://www.laruence.com/
--
PHP Internals - PHP Runtime Development Mailing List
To unsubscribe, visit: http://www.php.net/unsub.php
