Hi all,
I am writing an extension that does performance monitoring. I guess
somewhat like xdebug but a bit different. The user can specify the
functions / methods they care about and I will time the execution of those
things. I do this by hooking zend_execute. My hook is:
void
rrdmon_execute (zend_op_array *op_array TSRMLS_DC)
{
...
}
After a php file has loaded ((op_array->function_name == NULL) &&
op_array->filename)) I check through the list of functions the user wants
to monitor. I check to see if the thing they want to hook is a class or a
normal function and then do something like this:
HashTable *ftbl = EG(function_table);
zend_function *func;
if (is_a_class_method) {
zend_class_entry **ce;
if (zend_hash_find (CG(class_table), classnm, classnmlen, (void **)&ce)
== FAILURE) {
return;
}
ftbl = &((*ce)->function_table);
}
if (zend_hash_find (ftbl, funcnm, funcnmlen, (void **)&func) == FAILURE) {
return;
}
func->op_array.reserved[0] = pointer_to_my_stuff;
I dont actually use reserved[0] I do it properly getting the next offset
but this was for illustrative purposes only.
Then in my rrdmon_execute I do something like:
if (op_array->reserved[0]) {
... do stuff ...;
}
This all works well, until I tried this with a class that had a namespace.
The method is
Symfony\Component\HttpKernel\Controller\ControllerResolver::getController.
It finds the class name (everything pre the ::) in CG(class_table) and it
finds the function (getController) in that class's function table, but
unlike every other class and function I have tested this with, the op_array
that I put my stuff into isn't the one being executed. That is,
func->op_array isn't the op_array that ends up getting passed to
rrdmon_execute().
This seems to only be an issue with namespaces. Symfony does a bunch of
weird caching stuff so the class gets loaded out of a cache file but at
this level, that shouldn't matter.
So please, can someone who knows Zend's guts a bit better tell me if I am
doing something wrong (this has worked just fine for several months up
until I decided to time that stuff in Symfony which is the first time I
have encountered namespaces) or if the op_array somehow gets moved around
or how I should deal with namespaces for these purposes?
Any help greatly appreciated.
--Jim Edmunds.