Squeak-dev March 2012

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63 participants
208 discussions

Daily Commit Log
by commits＠source.squeak.org 21 Mar '12

21 Mar '12

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2012-March/005235.html Name: Compiler-eem.226 Ancestors: Compiler-nice.225 Fix bug in determining primitive error code offset (thanks Igor!) ============================================= http://lists.squeakfoundation.org/pipermail/packages/2012-March/005236.html Name: System-eem.472 Ancestors: System-eem.471 voidCogVMState primitive. =============================================

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I went to Biloxi and all I got was a Tshirt, part 2
by Chris Cunnington 20 Mar '12

20 Mar '12

http://www.zeromq.org/ http://www.zeromq.org/bindings:smalltalk http://www.squeaksource.com/ZeroMQ Here's a Ralph Johnson-ism for you: "Floating point is broken arithmetic". Seems his bete noire as an undergraduate and grad student was floating point. He'd get As in all his courses, but stumble on anything related to floating point. Then one day he figured it was just broken and never had a problem again. Ralph Johnson and Sam Adams from IBM, who is doing the parallel OOP talk today, sat at the back of the Dart presentation, laughed at things Eric Clayberg was saying, and generally were like the bad kids in the class. Clayberg would ask what was going on at the back row and just what was so funny. Ralph would say enigmatic things like "I'm really glad Dart has floating point!" I do get the impression they all know each other. Dart has a type system, but you don't need to use it. And you can use it wrong. int notReallyAnInt = 'Aaron' This works just fine. Apparently the type system "is designed not to be sound". Dart takes the idea of 'isolates' from Erlang. They are processes that don't share state, so I guess they are the opposite of threads. There is an override for definitions, so it's possible to have two isolates, two threads with separate definitions of something as fundamental as Symbol. Dart has no reflection, though they are planning to add 'mirrors' to provide it. This seems to be where you copy an object and make reflective requests of it without touching the original. Clayberg said over and over that they want to make Dart familiar, so arrays start at zero. This kind of thing. There is no eval() as in JavaScript. I'd imagine that cuts down on the metaprogramming capability. eval() allows for the program to generate code that it can execute within itself. It's slow and Dart wants to be speedy. You can snapshot with Dart and it can compile to JavaScript. It's hard to know who Dart is for, what its target market is, if there was an origin story, etc. One person asked whether Dart would replace Java on Android. Or is Dart to replace JavaScript for JavaScript programmers? It does seem plausible that Dart is for Java programmers extending their reach into the browser. The presentation was about features and not strategy, so it wasn't clear to me. Earlier in the day I met Sebastian Heidbrink of Heidbrink Consulting. He lives on Vancouver island and tends a banking client in Germany. Half of his coworkers never realized he moved. When he goes from Vancouver island to Vancouver the city he finds people so frenetic as to be distressing. I find that hilarious. When I go to Vancouver I feel as though I've been forcibly sedated. Sebastian said "I've got Seaside running on ZeroMQ". I had no idea what that meant. He's a big believer of the cloud as an application. If something needs doing, don't add it to your code, fire a socket at something that already does the job. ZeroMQ allows to ... I'm not sure what it does other than it's a networking layer and allows many things to run at once. It's interesting and there are links above with a binding on SqueakSource. Johnny T also know as John Thornton made a presentation on Amber, which looks very polished. He had a slide describing how primitive it is to switch from a text editor to a browser when writing HTML, JS, or CSS, and isn't it wonderful that you can use this great in-browser browser to do it all in the same place the way Amber does. I think this is silly. I have to add precisely two keyboard shortcuts to go back and forth between TextMate and Chrome. I like it. I think Johnny T is prone to be a little susceptible to the 'goly! gee!' nature of things, so that he confuses what is cool for what is practical. His presentation on Amber was good. He likes to do things like code node.js applications using Amber. After his talk he talked with Heidbrink who told him about ZeroMQ. His conversion was instantaneous. The two are going to do a lightning talk on Wednesday about using ZeroMQ for Amber. Today Sam Adams gives a talk on parallel OOP, which I think is going to be about the Roar VM. Chris Muller is going to give a talk on Location-Aware Networks, Context and Business-Intelligence. The Smalltalk Directions panel with Ralph Johnson is today. Again, I have no idea what that'll be about. I figure I'll make it to those three. The others that catch my eye are Using Glorp with New Projects That Need to Access Legacy Data by Mark Grinnell and Object-Centric Profiling: Advanced Visualizations to Tame Wild Execution with Alexander Bergel. There was a boat ride at the end of yesterday on the Gulf. That was fun. There are pelicans here with eighteen inch beaks. The sand beaches are like white sugar. The boat trip out into the bay was an hour and a great way to drink and chat. Chris

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The Trunk: System-eem.472.mcz
by commits＠source.squeak.org 20 Mar '12

20 Mar '12

Eliot Miranda uploaded a new version of System to project The Trunk: http://source.squeak.org/trunk/System-eem.472.mcz ==================== Summary ==================== Name: System-eem.472 Author: eem Time: 20 March 2012, 11:04:56.857 am UUID: 565bbe60-904f-4288-a5c5-90843e33c961 Ancestors: System-eem.471 voidCogVMState primitive. =============== Diff against System-eem.471 =============== Item was added: + ----- Method: SmalltalkImage>>voidCogVMState (in category 'miscellaneous') ----- + voidCogVMState + "Void any internal caches the VM maintains other than the method lookup caches. + These comprise + - the stack zone, where method activations are stored, and + - the machine code zone, where the machine code form of CompiledMethods is held." + <primitive: 214> + ^self primitiveFailed + + "Time millisecondsToRun: [Smalltalk voidCogVMState]" + "(1 to: 10) collect: [:ign| Time millisecondsToRun: [Smalltalk voidCogVMState]]"!

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The Trunk: Compiler-eem.226.mcz
by commits＠source.squeak.org 20 Mar '12

20 Mar '12

Eliot Miranda uploaded a new version of Compiler to project The Trunk: http://source.squeak.org/trunk/Compiler-eem.226.mcz ==================== Summary ==================== Name: Compiler-eem.226 Author: eem Time: 20 March 2012, 11:02:47.966 am UUID: a6a82cc9-7f79-4c3b-a02c-5ba6ed476b05 Ancestors: Compiler-nice.225 Fix bug in determining primitive error code offset (thanks Igor!) =============== Diff against Compiler-nice.225 =============== Item was changed: ----- Method: MethodNode>>generate:using: (in category 'code generation') ----- generate: trailer using: aCompiledMethodClass "The receiver is the root of a parse tree. Answer an instance of aCompiledMethodClass. The argument, trailer, is arbitrary but is typically either the reference to the source code that is stored with every CompiledMethod, or an encoding of the method's temporary names." | primErrNode blkSize nLits literals stack method | self generate: trailer using: aCompiledMethodClass ifQuick: [:m | m literalAt: 2 put: encoder associationForClass; properties: properties. ^m]. primErrNode := self primitiveErrorVariableName ifNotNil: [encoder fixTemp: self primitiveErrorVariableName]. encoder supportsClosureOpcodes ifTrue: [self ensureClosureAnalysisDone. encoder rootNode: self. "this is for BlockNode>>sizeCodeForClosureValue:"]. blkSize := (block sizeCodeForEvaluatedValue: encoder) + (primErrNode ifNil: [0] + ifNotNil: + [primErrNode + index: arguments size + temporaries size; + sizeCodeForStore: encoder "The VM relies on storeIntoTemp: (129)"]). - ifNotNil: [primErrNode sizeCodeForStore: encoder "The VM relies on storeIntoTemp: (129)"]). method := aCompiledMethodClass newBytes: blkSize trailerBytes: trailer nArgs: arguments size nTemps: (encoder supportsClosureOpcodes ifTrue: [| locals | locals := arguments, temporaries, (primErrNode ifNil: [#()] ifNotNil: [{primErrNode}]). encoder noteBlockExtent: block blockExtent hasLocals: locals. locals size] ifFalse: [encoder maxTemp]) nStack: 0 nLits: (nLits := (literals := encoder allLiterals) size) primitive: primitive. nLits > 255 ifTrue: [^self error: 'Too many literals referenced']. 1 to: nLits do: [:lit | method literalAt: lit put: (literals at: lit)]. encoder streamToMethod: method. stack := ParseStack new init. primErrNode ifNotNil: [primErrNode emitCodeForStore: stack encoder: encoder]. stack position: method numTemps. block emitCodeForEvaluatedValue: stack encoder: encoder. stack position ~= (method numTemps + 1) ifTrue: [^self error: 'Compiler stack discrepancy']. encoder methodStreamPosition ~= (method size - trailer size) ifTrue: [^self error: 'Compiler code size discrepancy']. method needsFrameSize: stack size - method numTemps. method properties: properties. ^method!

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erratum
by Chris Cunnington 20 Mar '12

20 Mar '12

"There is an override for definitions, so it's possible to have two isolates, two threads with separate definitions of something as fundamental as Symbol." I think I used 'threads' when I meant to say 'processes'. So, in Dart you can have two processes that have separate definitions of Symbol. Chris

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Etoys 5 Release Candidate 1
by karl ramberg 20 Mar '12

20 Mar '12

Hi We are getting closer to the release, and are now only adding bug fixes, no more features. Documentation and translation can continue as before. Download here: http://squeakland.org/download/ Please give us notice of any bug her: http://tracker.squeakland.org/secure/Dashboard.jspa or here: etoys-dev(a)squeakland.org or karlramberg <at> gmail.com Cheers, Karl

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International Workshop on Smalltalk Technologies 2011
by Alain Plantec 20 Mar '12

20 Mar '12

Dear smalltakers, We are now pleased to inform you that the IWST 2011 proceedings are currently on-line. here is the IWST link: http://dl.acm.org/citation.cfm?id=2166929&picked=prox&cfid=71182337&cftoken… From this page, you will be able to acces all papers. Regards, Loïc Lagadec & Alain Plantec IWST 2011 co-chairs

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I went to Biloxi and all I got was a Tshirt
by Chris Cunnington 20 Mar '12

20 Mar '12

http://twitter.com/#!/metacello/statuses/173496047207849985 http://ss3.gemstone.com/ss/FileTree.html https://github.com/finworks/smallsource Here in Biloxi at STIC, formerly Smalltalk Solutions. It's nice to go from Toronto at 11 degrees to Biloxi at 25 degrees. This is not Edinburgh. The casino has a weird policy on wifi so there is none in my room. There is an Ethernet jack and a cable bolted to the desk. It is no longer bolted. The details of why it is no longer bolted or how that nylon twist tie liberated itself I can neither confirm nor deny. Met most of the people I'll see for the next few days last night. So the introductions are done, I'd say. I'm going to a presentation in an hour on Dart by Eric Clayberg, who works on Dart at Google. Should be interesting in an academic way, as nobody will ever use Dart for anything. Tomorrow is a talk by Sam Adams at IBM called Big POOP. They are having fun with that name - Parallel OOP. I thought Smalltalk Directions, the parallel track, the academic track was going to be a cavalcade of stars. It has exactly one panel. I thought it was going to be a cavalcade, as there are about fifteen famous names on the paper vetting committee, none of which are here. If I understand correctly the Smalltalk Academic Advisory Council will have its one panel tomorrow with Andrew Black, Ralph Johnson, David West, and Roger Whitney. That is not to be missed. I guess the panel is about the future, so it could be about anything. Several people on that panel are destination speakers, I'd say. Chris Muller and myself had an interesting conversation with Dale Henrichs last night. Dale's doing a talk called Practical Git For Smalltalk. He want's to disintermediate squeaksource and squeaksource3 and use GitHub for Smalltalk. Instead of saving to an mcz file, you'd save to a directory structure with a chunk file for each method. The snapshot in an mcz file would no longer be a binary, a serialized object graph, but .st files in directories. If I understood correctly, the metadata glue would be JSON. Seems he had a light bulb moment reading about Otto Behrens at Finworks.biz, who has a process of doing just that. Otto's git page is above along with the SS3 location and the Metacello repository conversation. I tried loading ConfigurationOfFileTree in Pharo 1.3 and it failed. Then I tried to load ConfigurationOfFileTree in Pharo 1.4 and got the same message: 'The symbolic version #stable is not defined in ConfigurationOfFileTree for the current platform'. OK. I guess I'll ask Dale about it. The other idea Dale was mentioning about Metacello was to remove its dependency on Gofer or Installer, so that it could be directly scriptable.He says instead of a whole inhalation of classes when Metacello is used, there would be only two living permanently in the image. Seems I learned why MetacelloBrowser was a non-starter. For the sake of speed he used the class browser and then OmniBrowser to get Metacello running. But what Metacello needs he says is a wizard, where the user makes a few choices over a few pages. I can't say I'm familiar with any such thing in Smalltalk. OK, looks like if you resist the temptation to use Metacello and use Monticello to load MonticelloFileTree and MonticelloFileTree-Core from SS3, then they load in Pharo 1.4. And there are class comments. I can read those. And talk to Dale. Look at that. They load into Squeak4.3 without exploding. That's good. Well, you know what I know for the moment. I'm off to see a presentation on a brilliant language that will only ever work on Chrome. More coffee! Chris

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Daily Commit Log
by commits＠source.squeak.org 20 Mar '12

20 Mar '12

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2012-March/005231.html Name: Kernel-bf.673 Ancestors: Kernel-cmm.672 Fix decompileWithTemps (moving the better logic the Browser used into CompiledMethod), and use it when getting a method node. This makes the Debugger see the same decompiled source as the Browser. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2012-March/005232.html Name: Tools-bf.394 Ancestors: Tools-laza.393 Move decompilation logic from CodeHolder into CompiledMethod ============================================= http://lists.squeakfoundation.org/pipermail/packages/2012-March/005233.html Name: Kernel-eem.674 Ancestors: Kernel-bf.673 Make the improved decompileWithTemps function in the abandoned sources case (where a method holdsTempNames). ============================================= http://lists.squeakfoundation.org/pipermail/packages/2012-March/005234.html Name: Kernel-eem.675 Ancestors: Kernel-eem.674 Fix the improved decompileWithTempNames for doits without temp names. 673 breaks e.g. DecompilerTests new testRemoteTemp =============================================

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Pharo Consortium Important Documents and Request for Feedback
by stephane ducasse 19 Mar '12

19 Mar '12

Dear Pharo Friends and Supporters We worked a lot with INRIA lawyers and tried a lot of different scenarios. We arrived to a setup that make sense now we would like to get your input. Please have a look at the following powerpoint presentation and feel free to comment! We provide some sketches for the consortium fees and benefits for you. But we need your input! If you are not in the mailing-list: send us a mail to board(a)pharo-project.org. Remember that what we want to achieve is to be able to pay one (or more) full time engineer to help us improving our system and making that our future is bright. Since it may be difficult to follow closely our vision, dreams and current development efforts you can read the pharo vision document. https://gforge.inria.fr/frs/download.php/30436/PHARO-ENG-V4.2.pdf https://gforge.inria.fr/frs/download.php/30434/PharoVision.pdf The Pharo Team Remember: The best way to predict the future is to invent it. A. Kay And we want to do it :)

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