This has not that much to do with the InterpreterSimulator - although  
it is indeed yet another bytecode interpreter interpreter (see  
ContextPart>>step)

- Bert -


On Oct 3, 2007, at 23:17 , Rob Withers wrote:

> I know nothing about code simulation.  I really need to run the  
> InterpreterSimulator and learn, considering the vm changes I want  
> to make for my research.  I didn't know semaphores trip it up.  Is  
> there no way to repair that?  This would explain the call to  
> NetNameResolver>>#addressForName: returning garbage.
>
> Rob
>
> ----- Original Message ----
> From: Bert Freudenberg <bert at freudenbergs.de>
> To: The general-purpose Squeak developers list <squeak- 
> dev at lists.squeakfoundation.org>
> Sent: Wednesday, October 3, 2007 1:14:09 PM
> Subject: Re: Is there a message profiler in Squeak?
>
> #tallySends: simulates the code rather than running it. It will trip
> over the same things that can't be simulated as the debugger's "step"
> button. I guess code using semaphore like the network code won't work.
>
> - Bert -
>
> On Oct 3, 2007, at 20:15 , Robert Withers wrote:
>
> > This is reproducible and not limited to the vm I specified.  I also
> > ran this with vm: 'Squeak 3.8.12beta4U.app' and it crashed.  Also,
> > it crashes almost immediately, unlike what I said earlier.  Also,
> > there are several problems.  The crash is described below.  I am
> > also getting code simulation errors using MessageTally tallySends:
> > [...].   I think this sets up the crash.
> >
> > I dug into the code and this is what I found.  This code crashes
> > the vm:
> >
> >     Socket new connectTo: 1 port: 80.
> >
> > I call #connectTo:port: with an argument of 1 due to interference
> > by the MessageTally.  When I run the code below I crash:
> >
> >     | addr s |
> >     Socket initializeNetwork.
> >     MessageTally tallySends: [
> >         addr := NetNameResolver addressForName: 'www.google.org'.
> >         (s := SafeSocket new) connectTo: addr port: 80.
> >         s waitForConnectionFor: Socket standardTimeout  
> ifTimedOut: [].
> >     ].
> >
> > and when I run this code the result is 1.
> >     | addr s |
> >     Socket initializeNetwork.
> >     MessageTally tallySends: [
> >         addr := NetNameResolver addressForName: 'www.google.org'.
> >     ].
> >     addr
> >
> > I hope this helps,
> > Rob
> >
> > On Oct 3, 2007, at 10:16 AM, Robert Withers wrote:
> >
> >> Sure.  I am running on a Mac with vm: 'Squeak 3.8.18beta1U.app'.
> >> I am running an image started from Squeak3.10alpha.7081.image or
> >> so.  I am not sure of the exact update number since I don't have
> >> that root image around anymore.  I have loaded everything
> >> specified for SSH (2 bug fixes, telnet, Crypto, SSL, SSH).  I then
> >> ran this code, with appropriate values inserted for user and host:
> >>
> >> MessageTally tallySends: [SSH runBy: user to: host port: 22].
> >>
> >> It ran for a bit then crashed.
> >>
> >> Rob
> >>
> >> On Oct 3, 2007, at 9:59 AM, Travis Kay wrote:
> >>
> >>> Can you share what you executed that crashed your image?
> >>> Which image and vm versions?
> >>>
> >>> Travis
> >>>
> >>> Robert Withers wrote:
> >>>> As promising as this was, it killed my image.  I don't know
> >>>> why.  Luckily, all changes are saved!  I love Smalltalk!
> >>>>
> >>>> Rob
> >>>>
> >>>> On Oct 3, 2007, at 3:02 AM, Bert Freudenberg wrote:
> >>>>
> >>>>> On Oct 3, 2007, at 3:19 , Lukas Renggli wrote:
> >>>>>
> >>>>>>> I am looking for a class that displays the call tree of an
> >>>>>>> executed
> >>>>>>> block of code.
> >>>>>>
> >>>>>>     MessageTally spyOn: [ 1000 factorial ]
> >>>>>
> >>>>> That is only a sampling time profiler. A call tree you get by
> >>>>> doing
> >>>>>
> >>>>>     MessageTally tallySends: [42.0 printString]
> >>>>>
> >>>>> - Bert -
>
>