[Flashcoders] tracing function calls in AS2
Hi list, I've been dabbling in the black art of wrapping function calls today, and seeing the list is now and then visited by questions on how to trace function names for functions being called and how to insert and take out debug statements, I've decided to post this here, hopefully it's of use to someone, otherwise just ignore it:): http://objectpainters.com/blog/?p=62 Basically assume you have this (excerpt from the post): var lTestClass:TestClass = new TestClass (); lTestClass.testMethod(1,2,3); it that it prints (testMethod calls testMethod2): This is printed by testMethod This is printed by testMethod 2 Using the FunctionWrapper, it will print: = Entering testMethod with arguments 1,2,3 This is printed by testMethod = Entering testMethod2 This is printed by testMethod 2 = Exiting testMethod2 with no return value. = Exiting testMethod with return value:I am testMethod's returnvalue Greetz and a nice weekend to you all! JC ps you can specify which trace function to use, eg trace or _global.tt or whatever. ___ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
Re: [Flashcoders] tracing function calls
Thanks, these are all very useful suggestions. Unfortunately the
3rd-party swf did seem to break when I tried loading it into my own
flash movie so xray may not work for me. xflas2 is interesting in
that having a general reflection API would be useful in other
contexts.
-- Vishal
On 9/29/06, John Grden [EMAIL PROTECTED] wrote:
and xray uses Hans class resolver ;)
I've had this situation before as well, and what I did was create a base
flash movie that loaded the 3rd parties SWF in. Xray was in the library and
ready to inspect their swf. THe only problem with that is something might
break since now, that swf isn't at _level0. For that, you might try setting
_lockroot = true on the swf that's loaded and go from there.
On 9/29/06, Hans Wichman [EMAIL PROTECTED] wrote:
Hi,
there are different options, i think as2lib has some kind of AOP
mechanisms,
allowing you to add aspects to your code, eg a logging aspect. Not
entirely
sure about this but i think in this case it would come down to walking the
global tree, through all classes (assuming everything is as2), walking
through all functions in all classes and wrapping them the way Ray did
below.
If you'd use xflas2 (osflash.org/xflas2) with this, the classfinder and
functionfinder would already have been provided, and you could set a
FunctionHandler on the FunctionFinder which does the wrapping for you. I
am
working on having xflas2 provide the functionality you mention out of the
box, but for now, you'd have to add it yourself.
The nice thing with xflas2 though is that you could use:
Logger.markEntry(arguments);
instead of
trace({function: prop args: +arguments+});
and it would trace for example ClassA.methodA called from
ClassB.methodBwith arguments (1,2,3,4)
Since I havent gotten to doing myself yet, I can't tell what kind of
problems you'll encounter and if its possible at all:)
Another great tool to inspect your movie would be Xray ofcourse (
osflash.org/xray).
greetz
JC
On 9/29/06, Ray Chuan [EMAIL PROTECTED] wrote:
Hi,
try this:
function wrapper(obj:Object, prop:String):Void {
var f:Function = Function(obj[prop]);
obj[prop] = function() {
trace({function: prop args: +arguments+});
return f.apply(obj, arguments);
}
}
Let's say you want to wrap around the function Kite.fly:
wrapper(Kite, fly);
You could easily write something that wraps every method.
On 9/28/06, Vishal Kapur [EMAIL PROTECTED] wrote:
I am trying to debug a third-party flash movie (so I don't have direct
access to the code, but I can ask them to add small snippets). What I
would like to be able to do is to trace the name of a function/method
and the arguments it is passed upon invocation of that function. I
need to be able to do that in a non-intrusive and generic way.
Wondering what people's thoughts are on this. I can see a couple of
potential ways this could be done: one, override some internal
function that is used to make function calls; two, use a function like
__resolve() that would get called when any defined function is
invoked. Anybody know if such things exist? Or if there is some
other, simpler way which I'm missing?
Thanks,
Vishal
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Re: [Flashcoders] tracing function calls
Hi,
try this:
function wrapper(obj:Object, prop:String):Void {
var f:Function = Function(obj[prop]);
obj[prop] = function() {
trace({function: prop args: +arguments+});
return f.apply(obj, arguments);
}
}
Let's say you want to wrap around the function Kite.fly:
wrapper(Kite, fly);
You could easily write something that wraps every method.
On 9/28/06, Vishal Kapur [EMAIL PROTECTED] wrote:
I am trying to debug a third-party flash movie (so I don't have direct
access to the code, but I can ask them to add small snippets). What I
would like to be able to do is to trace the name of a function/method
and the arguments it is passed upon invocation of that function. I
need to be able to do that in a non-intrusive and generic way.
Wondering what people's thoughts are on this. I can see a couple of
potential ways this could be done: one, override some internal
function that is used to make function calls; two, use a function like
__resolve() that would get called when any defined function is
invoked. Anybody know if such things exist? Or if there is some
other, simpler way which I'm missing?
Thanks,
Vishal
___
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--
Cheers,
Ray Chuan
___
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Re: [Flashcoders] tracing function calls
Hi,
there are different options, i think as2lib has some kind of AOP mechanisms,
allowing you to add aspects to your code, eg a logging aspect. Not entirely
sure about this but i think in this case it would come down to walking the
global tree, through all classes (assuming everything is as2), walking
through all functions in all classes and wrapping them the way Ray did
below.
If you'd use xflas2 (osflash.org/xflas2) with this, the classfinder and
functionfinder would already have been provided, and you could set a
FunctionHandler on the FunctionFinder which does the wrapping for you. I am
working on having xflas2 provide the functionality you mention out of the
box, but for now, you'd have to add it yourself.
The nice thing with xflas2 though is that you could use:
Logger.markEntry(arguments);
instead of
trace({function: prop args: +arguments+});
and it would trace for example ClassA.methodA called from
ClassB.methodBwith arguments (1,2,3,4)
Since I havent gotten to doing myself yet, I can't tell what kind of
problems you'll encounter and if its possible at all:)
Another great tool to inspect your movie would be Xray ofcourse (
osflash.org/xray).
greetz
JC
On 9/29/06, Ray Chuan [EMAIL PROTECTED] wrote:
Hi,
try this:
function wrapper(obj:Object, prop:String):Void {
var f:Function = Function(obj[prop]);
obj[prop] = function() {
trace({function: prop args: +arguments+});
return f.apply(obj, arguments);
}
}
Let's say you want to wrap around the function Kite.fly:
wrapper(Kite, fly);
You could easily write something that wraps every method.
On 9/28/06, Vishal Kapur [EMAIL PROTECTED] wrote:
I am trying to debug a third-party flash movie (so I don't have direct
access to the code, but I can ask them to add small snippets). What I
would like to be able to do is to trace the name of a function/method
and the arguments it is passed upon invocation of that function. I
need to be able to do that in a non-intrusive and generic way.
Wondering what people's thoughts are on this. I can see a couple of
potential ways this could be done: one, override some internal
function that is used to make function calls; two, use a function like
__resolve() that would get called when any defined function is
invoked. Anybody know if such things exist? Or if there is some
other, simpler way which I'm missing?
Thanks,
Vishal
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--
Cheers,
Ray Chuan
___
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Re: [Flashcoders] tracing function calls
and xray uses Hans class resolver ;)
I've had this situation before as well, and what I did was create a base
flash movie that loaded the 3rd parties SWF in. Xray was in the library and
ready to inspect their swf. THe only problem with that is something might
break since now, that swf isn't at _level0. For that, you might try setting
_lockroot = true on the swf that's loaded and go from there.
On 9/29/06, Hans Wichman [EMAIL PROTECTED] wrote:
Hi,
there are different options, i think as2lib has some kind of AOP
mechanisms,
allowing you to add aspects to your code, eg a logging aspect. Not
entirely
sure about this but i think in this case it would come down to walking the
global tree, through all classes (assuming everything is as2), walking
through all functions in all classes and wrapping them the way Ray did
below.
If you'd use xflas2 (osflash.org/xflas2) with this, the classfinder and
functionfinder would already have been provided, and you could set a
FunctionHandler on the FunctionFinder which does the wrapping for you. I
am
working on having xflas2 provide the functionality you mention out of the
box, but for now, you'd have to add it yourself.
The nice thing with xflas2 though is that you could use:
Logger.markEntry(arguments);
instead of
trace({function: prop args: +arguments+});
and it would trace for example ClassA.methodA called from
ClassB.methodBwith arguments (1,2,3,4)
Since I havent gotten to doing myself yet, I can't tell what kind of
problems you'll encounter and if its possible at all:)
Another great tool to inspect your movie would be Xray ofcourse (
osflash.org/xray).
greetz
JC
On 9/29/06, Ray Chuan [EMAIL PROTECTED] wrote:
Hi,
try this:
function wrapper(obj:Object, prop:String):Void {
var f:Function = Function(obj[prop]);
obj[prop] = function() {
trace({function: prop args: +arguments+});
return f.apply(obj, arguments);
}
}
Let's say you want to wrap around the function Kite.fly:
wrapper(Kite, fly);
You could easily write something that wraps every method.
On 9/28/06, Vishal Kapur [EMAIL PROTECTED] wrote:
I am trying to debug a third-party flash movie (so I don't have direct
access to the code, but I can ask them to add small snippets). What I
would like to be able to do is to trace the name of a function/method
and the arguments it is passed upon invocation of that function. I
need to be able to do that in a non-intrusive and generic way.
Wondering what people's thoughts are on this. I can see a couple of
potential ways this could be done: one, override some internal
function that is used to make function calls; two, use a function like
__resolve() that would get called when any defined function is
invoked. Anybody know if such things exist? Or if there is some
other, simpler way which I'm missing?
Thanks,
Vishal
___
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--
Cheers,
Ray Chuan
___
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[Flashcoders] tracing function calls
I am trying to debug a third-party flash movie (so I don't have direct access to the code, but I can ask them to add small snippets). What I would like to be able to do is to trace the name of a function/method and the arguments it is passed upon invocation of that function. I need to be able to do that in a non-intrusive and generic way. Wondering what people's thoughts are on this. I can see a couple of potential ways this could be done: one, override some internal function that is used to make function calls; two, use a function like __resolve() that would get called when any defined function is invoked. Anybody know if such things exist? Or if there is some other, simpler way which I'm missing? Thanks, Vishal ___ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
