January 2010 - Pharo-dev - lists.pharo.org

[Pharo-project] What are Owners ???
by Mariano Martinez Peck Jan. 20, 2010

Jan. 20, 2010

I checked in squeak 2.6, 3.9 and 3.10. What is that class ? They have references in PharoCore. For example, look ImageSegment >> findOwnersOutPtrs I will probably remove that method, but I want to learn what Owners are/were. Does someone know ? Thanks Mariano

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[Pharo-project] Seaside + TDD
by Mariano Abel Coca Jan. 20, 2010

Jan. 20, 2010

Hi everyone, I'm trying to develop using TDD with seaside 3.0, but honestly, I couldn't find any framework or package that works fine with it. I've tried Albatross and Seaside Testing, both of them work great with Seaside 2.8, but fails to run or even to load in seaside 3.0. Any other suggestions? Thanks in advance. Mariano.

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[Pharo-project] DecompilationTests failures [was: About DecompilerTests >> decompilerDiscrepancies]
by Eliot Miranda Jan. 20, 2010

Jan. 20, 2010

On Wed, Jan 20, 2010 at 12:41 AM, Michael Roberts <mike(a)mjr104.co.uk> wrote: > IIRC this suite is fairly specialised as part of eliot's closure work. > I think we disabled it from running because we did not have time to > fix it. I don't have an image at the moment but it would be better to > leave it alone if you can until someone can study the decompiler in > depth. Unless Eliot can comment? > Actually I suspect decompilerDiscrepancies is equivalent to my 3.8-derived image's DecompilerTests>>decompilerFailures which exists to list methods that will cause decompilation tests to fail and predates my work with closures. My version reads decompilerFailures "here is the list of failures: DNU resulting in trying to decompile the following methods" ^ #((BalloonEngineSimulation circleCosTable "-0.3826834323650903 => -0.38268343236509 or -0.3826834323650902") (BalloonEngineSimulation circleSinTable "-0.3826834323650903 => -0.38268343236509 or -0.3826834323650902") (GeniePlugin primSameClassAbsoluteStrokeDistanceMyPoints:otherPoints:myVectors:otherVectors:mySquaredLengths:otherSquaredLengths:myAngles:otherAngles:maxSizeAndReferenceFlag:rowBase:rowInsertRemove:rowInsertRemoveCount: "Cannot compile -- stack including temps is too deep") (QPickable2D pick:) "foo ifTrue: [^bar] ifFalse: [^baz]. ^huh?" (QUsersPane userEntryCompare:to:) "foo ifTrue: [^bar] ifFalse: [^baz]. ^huh?" (TShaderProgram vertexStrings) "foo ifTrue: []. => foo. => ." (TShaderProgram fragmentStrings) "foo ifTrue: []. => foo. => ." (TWindow zoomWindow:) "foo ifTrue: [^bar] ifFalse: [^baz]. ^huh?" "(PNMReadWriter nextImage) (Collection #ifEmpty:ifNotEmpty:) (Collection #ifEmpty:) (Collection #ifNotEmpty:ifEmpty:) (Text #alignmentAt:ifAbsent:) (ObjectWithDocumentation propertyAt:ifAbsent:)") They all list methods whose compilation of their decompilation won't match what one started with either because of limitations in the decompiler or optimizations in the compiler. For example if one writes foo ifTrue: []. the compiler will emit that as foo, eliminating the branch around the empty block. So when that is decompiled it'll decompile as foo. and the compiler will then compile that as empty. So ... When you decompile the source code of the method containing foo ifTrue: [] it contains a parse node that prints as foo ifTrue: []. But the bytecode contains only the code for foo. so when you decompile that you get foo. and when you compile that you get no bytecode generated for foo. Other examples include cases where to:by:do: is decompiled as whileTrue:, where the precision of a written float exceeds the representation of underlying float objects, and so on. I don't see the point of fixing these things in either the compiler or the decompiler. They're legal Smalltalk, the optimizations the compiler performs is perfectly reasonable, and there seems no point in e.g. annotating the bytecode with information on the optimization so that the decompilation would be correct. Hence I think we have to live with the work-around which is filtering-out expected failures. Implementing the filter as a list is poor; better would be to have rules that match expected failures, but that's potentially a lot of tricky work for not much benefit. What would help is a) a simple tool to look at the discrepancies side-by-side (I have a workspace I can send you), and b) people who run the tests updating the filer-list with exceptions and documenting what causes each exception. HTH Eliot > Cheers mike > > On Tuesday, January 19, 2010, Mariano Martinez Peck > <marianopeck(a)gmail.com> wrote: > > Hi folks: does someone know what is this method for ? > > > > In my case, it has included the message saveImageSegments which I > rename it to saveImageSegments: > > > > So...what should I do ? I put saveImageSegments: instead of > saveImageSegments or I just remove it from there? > > > > Thanks > > > > Mariano > > > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >

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[Pharo-project] Parrot VM
by Miguel Enrique CobÃ¡ Martinez Jan. 20, 2010

Jan. 20, 2010

Parrot has just been released: http://www.parrot.org/news/2010/Parrot-2.0.0 I would like to know, from the VM experts from the community, if this VM can be used to run Smalltalk. The site says that "Parrot is a virtual machine aimed at running all dynamic languages.". but I don't know anything about VM so this sounds to me a bit like black magic. Is there something in the squeak vm that is specific to the way smalltalk works or a generic virtual machine (maybe with a upper layer understanding Smalltalk specifics) can be used. Thanks for the answers -- Miguel CobÃ¡ http://miguel.leugim.com.mx

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[Pharo-project] Something I don't understand with Method Finder
by Mariano Martinez Peck Jan. 20, 2010

Jan. 20, 2010

Hi folks! If you look for example "gently" in Method Finder, you will see that it lists, for example, "enableGently:" and "disableGently:" However, those methods are not implemented, there are no senders, and I even did a "method source with it " and I found nothing. In my final shut, I read the .changes and I found: "Preferences class removeSelector: #enableGently:!" Now I wonder...is this a feature of Method Finder to look also in .changes or it is a bug ? Anyway, it is not clear when you find a message but you don't have implementros or senders, it means that it was in .changes. What do you think? Thanks Mariano

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[Pharo-project] question about O2 vs OB
by Fernando olivero Jan. 20, 2010

Jan. 20, 2010

Hi, was wondering why we need O2 and OB as two different frameworks?, and why O2 is not an extension to OB, are they structurally different in design and implementation? I was wondering about this since i read the last emails about O2 and OB decoupling. Because now if we reintegrate O2, the system will have much more complexity. Thanks, Fernando

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[Pharo-project] Getting feedback on an headless VM
by Simon Denier Jan. 20, 2010

Jan. 20, 2010

Hi there I'm trying to run a VM in headless mode on a linux server (version 3.10-3 #32 Wed Apr 8 19:55:11 BST 2009 gcc 4.1.2). After struggling a bit to found a recent VM (that is, closure-enabled), now I can launch it with the following command: exec "$EXE/squeak" \ -plugins "$RES" \ -encoding latin1 \ -vm-display-null \ "$APP/testServer.image" Problem is the process starts but obviously got stuck after that. I got no feedback on what's going wrong (I guess some error happens and the system is waiting for user input). I tried with a fresh 10500 image and the simplest script I could think of to test: (FileStream forceNewFileNamed: 'foo.txt') nextPutAll: 'bar'; close ....same thing. Of course it works on my local machine with UI. Is there a way to debug this, like having the debugger to dump the stack in the terminal. I tried Cmd-. but it just stops the process (like Ctrl-c) with no feedback. -- Simon

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[Pharo-project] question about O2 vs OB
by Torsten Bergmann Jan. 20, 2010

Jan. 20, 2010

Lukas wrote >because O2 makes incompatible changes to the OmniBrowser framework. >The way O2 is implemented makes it impossible to run both together on the >same core model without conflicts. OK, but Alexandre wrote in [1]: "O2 has now no dependencies to OB anymore." so is Lukas' statement still true and both are in conflict or are these conflicts now resolved and it is possible to run both together? Thanks T. [1] http://lists.gforge.inria.fr/pipermail/pharo-project/2010-January/020475.ht… -- GRATIS fÃ¼r alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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Jan. 20, 2010

11173 ----- - Polymorph Fixes for control button appearance. Stef

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[Pharo-project] We remove CodeLoader ?? [WAS] Presenter and Project will die aren't they ?
by Mariano Martinez Peck Jan. 20, 2010

Jan. 20, 2010

So....we will remove CodeLoader then ? This is the moment to speak :) I ask about this because I am trying to analize who uses ImageSegments and all that stuff in the code and see how easily or good is to remove ImageSegment to a separate package. And, CodeLoader uses ImageSegment. As far as I looked, the only user or CodeLoader, as Michael said is ProjectLauncher >> startUpAfterLogin Which....I think it will also die in a moment if Project will die too.... Anyway, but do you think about changing startUpAfterLogin to this: startUpAfterLogin | scriptName loader isUrl | self readDocumentAtStartup ifTrue: [ scriptName := (SmalltalkImage current getSystemAttribute: 2) ifNil:['']. scriptName := scriptName convertFromSystemString. scriptName isEmpty ifFalse:[ "figure out if script name is a URL by itself" isUrl := (scriptName asLowercase beginsWith:'http://') or:[ (scriptName asLowercase beginsWith:'file://') or:[ (scriptName asLowercase beginsWith:'ftp://')]]. isUrl ifFalse:[scriptName := 'file:',scriptName]]. . ] ifFalse: [ scriptName := '' ]. scriptName isEmptyOrNil ifTrue:[^ self]. loader := CodeLoader new. loader loadSourceFiles: (Array with: scriptName). loader installSourceFiles. On Tue, Jan 12, 2010 at 9:56 AM, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr > wrote: > ok we got convinced :) > > On Jan 12, 2010, at 8:20 AM, John M McIntosh wrote: > > > Ah well yes Michael suffered thru managing, testing, and working with all > those browsers & plugins. > > I suffered thru trying to figure out how it all worked... At least on > the mac. > > > > Here's the current issue, because: > > > > Microsoft shafted netscape by abandoning the netscape API, then shafted > apple by not providing an alternative > > we had the strange mixture of a solution for os-x, windows, X11. Then of > course Microsoft IE on macintosh > > would change behaviour from version to version to screw with FireFox & > Mozilla etc. Let alone worrying about Opera which > > kinda worked. Fortunately Microsoft abandon the Mac browser market, and > Apple introduced Safari which again was slightly different. > > > > Now on 10.6 we had this problem an abandon API for plugins, that needed > to move forward, also into the 64bit world. > > So Apple changed things again to either let you run Safari in 32bit using > old plugins (busted), or using a modified 64bit plugins api, but > > not both at the same time. > > > > The words busted, non-existant, abandon, (implied ugly), appear quite a > few times in the sentences above. Also on every > > browser version change, or operating system major version change > something was just slightly funky enough to bring down > > the house of cards. > > > > So, time is better spent in getting 64bit squeak working, since there is > plenty of hours still needed to fixup all the plugins, > > and check that the VM is actually sane... > > > > > > On 2010-01-11, at 1:59 PM, Michael Rueger wrote: > > > >> On 1/11/2010 10:58 PM, Michael Rueger wrote: > >> > >>> forget squeak/pharo in the browser. > >> > >> for those not in the know: > >> I'm one of the poor guys who actually spent a *lot* of time making it > >> possible ;-) > >> > >> Michael > >> > >> _______________________________________________ > >> Pharo-project mailing list > >> Pharo-project(a)lists.gforge.inria.fr > >> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project > > > > -- > > > =========================================================================== > > John M. McIntosh <johnmci(a)smalltalkconsulting.com> Twitter: > squeaker68882 > > Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com > > > =========================================================================== > > > > > > > > > > > > _______________________________________________ > > Pharo-project mailing list > > Pharo-project(a)lists.gforge.inria.fr > > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project > > > _______________________________________________ > Pharo-project mailing list > Pharo-project(a)lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >

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