Squeak-dev August 2004

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394 discussions

[FIX] CSUniqueNameFix-nk
by ned＠squeakland.org 30 Aug '04

30 Aug '04

from preamble: "Change Set: CSUniqueNameFix-nk Date: 30 August 2004 Author: Ned Konz Avoids the annoying tendency to add a '1' to the end of change set names on loading when the names are already unique. "!

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RE: Progress on 64-bit port
by Dan Ingalls 30 Aug '04

30 Aug '04

"PhiHo" <smallsqueak(a)rogers.com> wrote... > > 32-bit Object header: > > 3 bits reserved for gc (mark, old, dirty) >> 12 bits object hash (for HashSets) >> 5 bits compact class index >> 4 bits object format (includes low bits of size in bytes) >> 6 bits object size in 32-bit words >> 2 bits header type (0: 3-word, 1: 2-word, 2: > > forbidden, 3: 1-word) > > I guess there is no changes from the current 32-bit header ? Correct. > I've been wondering why header type wasn't like this: > 1 : 1-word > 2 : 2-word > 3 : 3-word > 0 : reserved (this is for headless objects only ;-) No compelling reason one way or the other. I've forgotten the original motivation. By the way, the GC makes temporary use of the "forbidden" pattern. > How much bigger is the 64-bit image compared to > 32-bit image for, say, the 3.7 gamma ? Morphic32.image 18.3 Morphic64.image 27.7 This is an 3.7 gamma image plus VMMaker and a number of projects. You can, of course, predict this for any image with code like... | nWords c headerSize nInstVars nIndexableWords | nWords := 0. Smalltalk systemNavigation allObjectsDo: [:x | c := x class. headerSize := c indexIfCompact > 0 ifTrue: [1] ifFalse: [2]. "Very few are 3" nInstVars := c instSize. nIndexableWords := (c isVariable and: [c isBytes not]) ifTrue: [x size] ifFalse: [0]. nWords := nWords + headerSize + nInstVars + nIndexableWords]. ^ (nWords - Display bits size) * 4 "expected increment in size (Display not saved)" For the above image, it predicted an increment of 10210684 a while after the two images were written. > Is BalloonEngine just B2DPlugin or it also includes > B3DAcceleratorPlugin ? We have only converted B2D. > I am interested to know how FilePlugin is implemented. It's included with VMMaker. We made no changes except to get it to run in 64 bits. > > The second is > > some discussion in our group about the possibility of making >> *much* more major changes. As soon as we get clearer about >> this and confirm our intention, we'll have more to say about >> it. If we were to go ahead with such a rethink, then any time > > spent on Version 4 would have been wasted. > > > This sounds good. Can you disclose what are these > *much* more major changes that are being discussed ? No; it's not that we have some great secret scheme that we're not willing to disclose. It's that we're looking at several possible VM approaches and we can't know, if and until we find one to be a significant win, what object and method formats might maximize the benefits. Ian and Tony Hannan are the ones investigating these, and I'm sure they'll write about what they're up to as soon as they think they have something worth discussing. Think simple and fast and you can recreate all the discussions we've had. > > We have not done any testing beyond the point of bringing up >> a morphic screen with Squeak mouse, opening a browser and >> running the benchmarks. There is lots to test, and surely a >> number of bugs yet to be found. The Squeak community can be > > of enormous help here. > > I hope you did test " 3 + 4 " ;-) For sure. And it is a pretty good test, since you have to display the windows (with gradient fills, outline text and all), run text editing, bring up a menu and run the compiler to get there. Become, GC and process switches happen along the way, too. Full GC and save work also. > Please drop me a note if there is an opportunity for > an earlybird preview of Windows (IA32/IA64) ports. Gladly. - Dan

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Trait 1.1 and Basic 3.7 gamma2
by PhiHo Hoang 30 Aug '04

30 Aug '04

Hi, I've been trying to load Traits beta 1.1 (r2) from SM into Basic 3.7 gamma2 image a few times and it always failed after 1559 classes were recompiled. " UndefinedObject(Object)>>doesNotUnderstand: #methodsFor:stamp: Receiver: nil Arguments and temporary variables: aMessage: methodsFor: '*TraitsMonticelloPreload' stamp: 'al 3/30/2004 11:37' Receiver's instance variables: Nil " The release notes says "updated to make it load in image 3.7b-5967. Gamma2 is at latest update #5987. Did anyone successfully install Traits 1.1 beta (r2) into Basic image gamma 2 on Windows platform? Do I need to load Monticello first ? When I tried to load Monticello 123, it was warned that Monticello 123 is not compatible with 3.7. The warning was ignored and Monticello 123 was installed, then Traits 1.1 was again loaded. 1576 classes were recompiled. Same results, same error, no go. Would someone please tell me how to install Traits. Please find attached SqueakDebug.log.gz PhiHo.

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Re: Shrinking
by Pavel Krivanek 30 Aug '04

30 Aug '04

> So, this is a Smalltalk's feature ? > > It's rather strange and amazing to me. Yes, it's basic feature. Look at this code: | var | var := 'string' factorial. [ var Smalltalk ] System. This code is valid even though factorial isn't method in class String, Smalltalk isn't message selector but global variable, System isn't message selector nor global variable - it's only an existing symbol. But this lax control has very good reasons. > Do you have a pointer explaining this behavior and how > does it work ? > > Does it have anything to do with late binding ? > > When will the missing selector and its implementation > be discovered ? It's simple. When you compile a method, you create a CompiledMethod instance. It contains an array of literals - in this case it's symbol #factorial, string 'string', symbol System and symbol Smalltalk. In bytecode you only tell - you've got an object on the top of the stack. Send a message identified by literal #3 to it. If the called object doesn't know this method, it generates an exception MessageNotUnderstood. Smalltalk is an incremental system. When you write a method, you don't know all classes and messages present in system in time of execution. It gives you amazing freedom but you've got to test your programs accurately. Pavel

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[FIX][Celeste][3.7g2] createDB fails
by Lantz Rowland 30 Aug '04

30 Aug '04

Celeste v1.23 fails on open when it needs to create a new MailDB. This error exists in Squeak3.7g2Full.image. It also occurs if you install Celeste 1.23 from SqueakMap and have no MailDB. You can open an EMail Reader in 37g2 which will show up looking fine. Selecting the OPEN link in the text displayed will created you a new database for you with three files: EMAIL.index, EMAIL.messages and EMAIL.categories. The new categories file is the issue. Changed MailDB>>createDB to add category '.tosend.' to the new database since it is required by Celeste>>outBoxStatus. If you install Celeste from SqueakMap it presents a bit different since the CelesteAddressBook opens the MailDB as it is initialized. Lantz -- Lantz Rowland <LantzR(a)comcast.net> Think Different! Think YottaHertz!

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REMINDER: Harvesting Party Tuesday August 31st 05:00 GMT
by Ken Causey 30 Aug '04

30 Aug '04

Just a reminder that the next Harvesting Party will take place between 05:00 (5 AM) and 09:00 (9 AM) GMT Tuesday August 31st, 2004. As usual we will meet in #squeak on irc.freenode.net. More information about the #squeak IRC channel can be found at http://people.squeakfoundation.org/article/7.html Information about the Harvesting Party idea can be found at http://people.squeakfoundation.org/article/29.html If you have the time please attend and work toward the future of Squeak. The next seven parties are scheduled for 09:00 (09:00 AM) GMT Saturday September 04, 2004 13:00 (01:00 PM) GMT Wednesday September 08, 2004 17:00 (05:00 PM) GMT Sunday September 12, 2004 21:00 (09:00 PM) GMT Thursday September 16, 2004 01:00 (01:00 AM) GMT Tuesday September 21, 2004 05:00 (05:00 AM) GMT Saturday September 25, 2004 09:00 (09:00 AM) GMT Wednesday September 29, 2004

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Automatische Mailnachricht: Abwesenheit / Out of the office
by jwitt＠wella.de 30 Aug '04

30 Aug '04

Ich werde ab 28.08.2004 nicht im Büro sein. Ich kehre zurück am 08.09.2004. I am not in the office but will monitor my mail. In case of urgent issues , please leave me a message on my mobile phone. regards, Jean-Baptiste Witt

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Re: Shrinking
by Pavel Krivanek 29 Aug '04

29 Aug '04

There are quite often used classes in category 'Shrink-Helpers'. They must be carefully removed from shrinked image in future. But it was much easier to remove the current implementation and substitute it with empty class so Squeak sources are still consistent. When Smalltalk compiles source codes, it doesn't know real classes of receivers so it doesn't know the set of tolerable messages too. Compiler only checks if the system contains the symbol used in method source as a message selector. Pavel

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SqueakMap down?
by Ned Konz 29 Aug '04

29 Aug '04

I can't get to SqueakMap. Anyone able to fix this? -- Ned Konz http://bike-nomad.com/squeak/

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[ANN][DOC] Tutorial for MVC
by Boris Gaertner 29 Aug '04

29 Aug '04

Hereby I announce the availability of a tutorial about MVC. It is a collection of HTML documents and can be downloaded as archive file from http://www.bgaertner.gmxhome.de/MVCtutorial.htm where you find also some additional information. (This is a preliminary download address, I plan to place a reviewed version on the Swiki.) Greetings, Boris

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