zeev,andi
i have a problem with the oci-extension - it makes heaviy
usage of ref-counting and creates dependices between resouces
using refcounts. so i depend on a defined shutdown order and
i also depend on the complete symbol-table to be destroyed
before zend_destroy_rsrc_list is called as zend_destroy_rsrc_list
won't work with my dependicies.
i have created a small testcase that shows my problem without
using the oci extension:
the problem is that if a function calles exit the argumets
for that function are _not_ destroyed in the shutdown
mechanism of zend -
<?
function any($fh)
{
// exit(); // exit in a function is noo good...
}
$fp = fopen("/tmp/1","r");
any($fp);
?>
if i set a breakpoint in _file_fopen_dtor (whic is the dtor
for all fopen calls) i get these call frames
_not_ calling exit in any($fh);
#0 _file_fopen_dtor (rsrc=0x8420554) at /home/thies/devel/php4/ext/standard/file.c:149
#1 0x08190cbb in list_entry_destructor (ptr=0x8420554) at
../../php4/Zend/zend_list.c:179
#2 0x0818e65d in zend_hash_del_key_or_index (ht=0x83ae410, arKey=0x0, nKeyLength=0,
h=1, flag=1)
at ../../php4/Zend/zend_hash.c:543
#3 0x08190a25 in zend_list_delete (id=1) at ../../php4/Zend/zend_list.c:57
#4 0x081a5d70 in _zval_dtor (zvalue=0x8420484, __zend_filename=0x830aa40
"../../php4/Zend/zend_execute_API.c",
__zend_lineno=260) at ../../php4/Zend/zend_variables.c:80
#5 0x08193742 in _zval_ptr_dtor (zval_ptr=0x84205a0,
__zend_filename=0x8316ce0 "../../php4/Zend/zend_variables.c", __zend_lineno=169)
at ../../php4/Zend/zend_execute_API.c:260
#6 0x081a5fcb in _zval_ptr_dtor_wrapper (zval_ptr=0x84205a0) at
../../php4/Zend/zend_variables.c:169
#7 0x0818e789 in zend_hash_destroy (ht=0x83ae2ec) at ../../php4/Zend/zend_hash.c:572
#8 0x081934f2 in shutdown_executor () at ../../php4/Zend/zend_execute_API.c:164
#9 0x08195a70 in zend_deactivate () at ../../php4/Zend/zend.c:538
#10 0x08089af9 in php_request_shutdown (dummy=0x0) at
/home/thies/devel/php4/main/main.c:692
#11 0x08085bd3 in main (argc=2, argv=0xbffff7a4) at
/home/thies/devel/php4/sapi/cgi/cgi_main.c:790
#12 0x409e3450 in __libc_start_main () from /lib/libc.so.6
as you can see $fp is freed thru the call to
zend_hash_destroy(&EG(symbol_table)); in shutdown_executor.
but not so if i'm _calling_ exit in any($fh);
#0 _file_fopen_dtor (rsrc=0x84205cc) at /home/thies/devel/php4/ext/standard/file.c:149
#1 0x08190cbb in list_entry_destructor (ptr=0x84205cc) at
../../php4/Zend/zend_list.c:179
#2 0x0818ea00 in zend_hash_apply_deleter (ht=0x83ae410, p=0x8420574) at
../../php4/Zend/zend_hash.c:627
#3 0x0818ebae in zend_hash_graceful_destroy (ht=0x83ae410) at
../../php4/Zend/zend_hash.c:678
#4 0x08190e13 in zend_destroy_rsrc_list () at ../../php4/Zend/zend_list.c:234
#5 0x08193591 in shutdown_executor () at ../../php4/Zend/zend_execute_API.c:178
#6 0x08195a70 in zend_deactivate () at ../../php4/Zend/zend.c:538
#7 0x08089af9 in php_request_shutdown (dummy=0x0) at
/home/thies/devel/php4/main/main.c:692
#8 0x08085bd3 in main (argc=2, argv=0xbffff7a4) at
/home/thies/devel/php4/sapi/cgi/cgi_main.c:790
#9 0x409e3450 in __libc_start_main () from /lib/libc.so.6
(gdb) r
as you see the resource is cleaned thru
zend_destroy_rsrc_list which won't work with dependicies.
again the problem is that the arguments on the stack do _not_
get cleared if a function calls exit().
what can be done?
tc
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