13 years ago by Xinchen Hui — view source — reply

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Hi:
As dmitry said today, there is no way to get a user opcode
handler which can be called after a specific built-in handler.

  So please expose zend_vm_get_opcde_handler.  Before 5.4 release. :)

   Thanks.

Sent from my iPad

13 years ago by Xinchen Hui — view source — reply

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Hi:
a patch for this proposal:

Index: zend_vm_gen.php

--- zend_vm_gen.php (revision 323168)
+++ zend_vm_gen.php (working copy)
@@ -797,7 +797,7 @@
if (ZEND_VM_OLD_EXECUTOR && $spec) {
out($f,"static int zend_vm_old_executor = 0;\n\n");
}

```
  			out($f,"static opcode_handler_t
```

zend_vm_get_opcode_handler(zend_uchar opcode, zend_op* op);\n\n");

```
  			out($f,"ZEND_API opcode_handler_t
```

zend_vm_get_opcode_handler(zend_uchar opcode, zend_op* op);\n\n");
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,"\n");
@@ -1243,7 +1243,7 @@
}

// Generate zend_vm_get_opcode_handler() function

out($f, "static opcode_handler_t
zend_vm_get_opcode_handler(zend_uchar opcode, zend_op* op)\n");

out($f, "ZEND_API opcode_handler_t
zend_vm_get_opcode_handler(zend_uchar opcode, zend_op* op)\n");
out($f, "{\n");
if (!ZEND_VM_SPEC) {
out($f, "\treturn zend_opcode_handlers[opcode];\n");
Index: zend_vm_execute.h
===================================================================
--- zend_vm_execute.h (revision 323168)
+++ zend_vm_execute.h (working copy)
@@ -299,7 +299,7 @@
241,242,243,244,245,246,247,248,249,250,251,252,253,254,255
};

-static opcode_handler_t zend_vm_get_opcode_handler(zend_uchar opcode,
zend_op* op);
+ZEND_API opcode_handler_t zend_vm_get_opcode_handler(zend_uchar
opcode, zend_op* op);

#undef OPLINE
@@ -40192,7 +40192,7 @@
};
zend_opcode_handlers = (opcode_handler_t*)labels;
}
-static opcode_handler_t zend_vm_get_opcode_handler(zend_uchar opcode,
zend_op* op)
+ZEND_API opcode_handler_t zend_vm_get_opcode_handler(zend_uchar
opcode, zend_op* op)
{
static const int zend_vm_decode[] = {
_UNUSED_CODE, /* 0 */

thanks

Hi:
As dmitry said today, there is no way to get a user opcode
handler which can be called after a specific built-in handler.

So please expose zend_vm_get_opcde_handler. Before 5.4 release. :)

Thanks.

Sent from my iPad

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

13 years ago by Stas Malyshev — view source — reply

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Hi!

Hi:
a patch for this proposal:

Don't see any problem with it. Dmitry, any issues you see with it?
If not, we can commit it.

--
Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227

13 years ago by Dmitry Stogov — view source — reply

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In general exposing zend_vm_get_opcode_handler() can't help.
You know that executor might be generated/compiled not only using
call-treading but also using switch or goto. In these cases
zend_vm_get_opcode_handler() won't return a function that could be called.

Thanks. Dmitry.

Hi!

Hi:
a patch for this proposal:

Don't see any problem with it. Dmitry, any issues you see with it?
If not, we can commit it.

13 years ago by Xinchen Hui — view source — reply

unread

In general exposing zend_vm_get_opcode_handler() can't help.
You know that executor might be generated/compiled not only using
call-treading but also using switch or goto. In these cases
zend_vm_get_opcode_handler() won't return a function that could be called.
Hi:
sure, but I really need a way (even it's narrow) for my new extension..

or, should I make a patch to add a ZEND_USER_OPCODE_CALL_ME_LATER ?

thanks

Thanks. Dmitry.

Hi!

Hi:
a patch for this proposal:

Don't see any problem with it. Dmitry, any issues you see with it?
If not, we can commit it.

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

13 years ago by Xinchen Hui — view source — reply

unread

In general exposing zend_vm_get_opcode_handler() can't help.
You know that executor might be generated/compiled not only using
call-treading but also using switch or goto. In these cases
zend_vm_get_opcode_handler() won't return a function that could be called.
Hi:
sure, but I really need a way (even it's narrow) for my new extension..

Why I insistent this is there might be more than 80% php running
with-vm-kind=CALL

so expose this make sense for most of us.

but you really remind me, that I shoud also add a flag to detect what
the vm-kind now...

thanks

or, should I make a patch to add a ZEND_USER_OPCODE_CALL_ME_LATER ?

thanks

Thanks. Dmitry.

Hi!

Hi:
a patch for this proposal:

Don't see any problem with it. Dmitry, any issues you see with it?
If not, we can commit it.

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

13 years ago by Stas Malyshev — view source — reply

unread

Hi!

but you really remind me, that I shoud also add a flag to detect what
the vm-kind now...

Adding ZEND_API in one place is no problem, but any messing with the
engine is out of the question now.

Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227

13 years ago by Xinchen Hui — view source — reply

unread

Hi!

but you really remind me, that I shoud also add a flag to detect what
the vm-kind now...

Adding ZEND_API in one place is no problem, but any messing with the engine
is out of the question now.
okey, let's just talk about adding ZEND_API. :)

thanks

--
Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

13 years ago by Stas Malyshev — view source — reply

unread

Hi!

okey, let's just talk about adding ZEND_API. :)

But as Dmitry noted, it's only present in one model, so how useful would
it be? I don't want to add patches that are not beneficial for anything
but a very narrow use case. Could you explain what are you trying to do?

Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227

13 years ago by Xinchen Hui — view source — reply

unread

Hi!

okey, let's just talk about adding ZEND_API. :)

But as Dmitry noted, it's only present in one model, so how useful would it
be? I don't want to add patches that are not beneficial for anything but a
very narrow use case. Could you explain what are you trying to do?
okey, I am woking on a extension : taint
(https://github.com/laruence/php-ext-taint) , I need find a way to
set a handler which will be called after some built-in handler

like:
$a = "taint string";
then
$b .= $a ; //should also be a taint string.

as the code above shows, I need call ASSIGN_CONCAT first then edit
the result of the last opline.

but now I can not do it unless copy the origin handler and all it
denpend codes, then call it myself (which is what I did now)...

thanks

--
Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

13 years ago by Xinchen Hui — view source — reply

unread

Hi:
after got some advise of dmitry on IRC, I decide to drawback this proposal.

and try to find a much better patch later.

thanks very much, and sorry for noise.

thanks

Hi!

okey, let's just talk about adding ZEND_API. :)

But as Dmitry noted, it's only present in one model, so how useful would it
be? I don't want to add patches that are not beneficial for anything but a
very narrow use case. Could you explain what are you trying to do?
okey, I am woking on a extension : taint
(https://github.com/laruence/php-ext-taint) , I need find a way to
set a handler which will be called after some built-in handler

like:
$a = "taint string";
then
$b .= $a ; //should also be a taint string.

as the code above shows, I need call ASSIGN_CONCAT first then edit
the result of the last opline.

but now I can not do it unless copy the origin handler and all it
denpend codes, then call it myself (which is what I did now)...

thanks

--
Stanislav Malyshev, Software Architect
SugarCRM: http://www.sugarcrm.com/
(408)454-6900 ext. 227

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

--
惠新宸 laruence
Senior PHP Engineer
http://www.laruence.com

Please expose zend_vm_get_opcde_handler

Index: zend_vm_gen.php

Adding ZEND_API in one place is no problem, but any messing with the engine is out of the question now.

But as Dmitry noted, it's only present in one model, so how useful would it be? I don't want to add patches that are not beneficial for anything but a very narrow use case. Could you explain what are you trying to do?

Adding ZEND_API in one place is no problem, but any messing with the
engine is out of the question now.

But as Dmitry noted, it's only present in one model, so how useful would
it be? I don't want to add patches that are not beneficial for anything
but a very narrow use case. Could you explain what are you trying to do?