#25235 [Com]: win32api problem in arguments
| From: | foxkill at gmx dot de | Date: | Wed, 03 Sep 2003 07:17:37 +0000 |
| Subject: | #25235 [Com]: win32api problem in arguments | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-47121@lists.php.net to get a copy of this message | ||
ID: 25235
Comment by: foxkill at gmx dot de
Reported By: fgarcia at uef dot es
Status: Open
Bug Type: *Extensibility Functions
Operating System: win32
PHP Version: 4.3.3
New Comment:
The problem is within the WIN32API_CLASS_FUNCTION(win32,
invokefunction). It declares the variable func_argument as zval**
func_arguments = NULL and later on it calls
zend_get_parameters_array_ex(argc, &func_arguments). If there are more
than 2 arguments this call overwrites the stack and thereby the
variable w32api_return_buffer
(and some others). w32api_return_buffer is now not null in the
following call to php_w32api_do_dynamic_call and the stack calculation
in this function goes wrong.
In my opinion the variable func_arguments should be allocated
dynamically according to number of actual parameters.
Previous Comments:
------------------------------------------------------------------------
[2003-08-25 08:24:04] fgarcia at uef dot es
Description:
------------
I need to use a dll external function.
My code in php 4.2.3 was:
------------------
w32api_register_function("MYLIB.DLL",
"MYFUNC",
"long");
$attr1="string1";
$attr2="string2";
$attr3="string3";
$attr4="string4";
$attr5="string5";
$attr6=long2Str(2);// long
$iError=MYFUNC($attr1,$attr2,$attr3,$attr4,$attr5,$attr6);
$iRtn=str2Long($siRtn);
--------------
The code works.
Now (php 4.3.2) my code is:
--------------
$api = new win32();
$api->RegisterFunction("int MYFUNC(string attr1, string attr2, string
attr3, string attr4, string attr5, int &attr6) From MYLIB.DLL");
$attr1="string1";
$attr2="string2";
$attr3="string3";
$attr4="string4";
$attr5="string5";
$attr6=2;// long
$iError=$api->MYFUNC($attr1,$attr2,$attr3,$attr4,$attr5,$attr6);
-------------------
and php crashes.
I've traced the dll call and I've seen that arguments aren't pass well
to the dll.
In PHP 4.2.3 version, first argument (attr1) offsets 0x04 bytes (in the
call stack) but in 4.3.3 version the same first argument offsets 0x08
bytes.
It seems that PHP 4.3.3 version puts an extra (???) attribute in the
call stack.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=25235&edit=1