Squeak-dev March 2010

squeak-dev@lists.squeakfoundation.org

158 participants
767 discussions

Alien & Squeak FFI issues on Snow Leopard.
by John M McIntosh 16 May '10

16 May '10

Someone finally managed to fire up a Sophie app http://www.opensophie.org/ on Snow Leopard and immediately found an issue that also affects Squeak users who do fascinating things with FFI The innocent FFI call was apifstat: afileNo statBuffer: buffer <cdecl: long 'fstat' (long MacStat* ) module: 'libc.dylib'> ^self externalCallFailed Now it seems BEFORE Snow Leopard *somehow* the Squeak external primitive call api which is part of the VM to assist in loading plugins or finding function entry points in executable binaries or libraries would return the entry point for fstat by *somehow* finding libc.dylib which is via /usr/lib/libc.dylib -> libSystem.dylib -> libSystem.B.dylib Interestingly this is found implicitly since the mac carbon vm lookup logic never looks in /usr/lib/ Now in Snow Leopard it seems they do less implicit searching, perhaps a security concern? Then it fails. In the past the Unix VM would search a hundred(sic) more places, but I understand less today, but it might still work? Maybe /usr/lib is in the hit list? This issue also applies to Alien because it calls back to the VM for it to find the module and function entry point. Since I have received a request to ensure that doing an explicit full path should be allowed in the squeak carbon macintosh vm. Then a change would be: apifstat: afileNo statBuffer: buffer <cdecl: long 'fstat' (long MacStat* ) module: '/usr/lib/libc.dylib'> ^self externalCallFailed I'll look at doing this shortly. However the workaround is to go to Sophie.app/Contents/Resources and do a ln -s /usr/lib/libc.dylib libc.dylib to create a symbolic link in the Resources directory for libc.dylib since we do explicitly look for libc.dylib in the Resources directory. Obviously if you have a FFI call like above where you are calling a system library Oracle? for example. You might find it no longer works with Snow Leopard on the Macintosh, so you should check. -- = = = ======================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> Twitter: squeaker68882 Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================

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4.1 - hashed collections still a problem
by Chris Muller 21 Apr '10

21 Apr '10

4.1 hashed collections, across the board, small to large, are slower by a factor of 2?! I just don't think we can keep doing this; getting slower and slower and slower, like molasses.. I'm sorry, but I really care about this and I know you do too because speed was the whole premise of putting these changes in. What went wrong? More importantly, how can we fix this?

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[Ann] [Cuis] Cuis 2.3 released
by Juan Vuletich 14 Apr '10

14 Apr '10

Hi Folks, Cuis 2.2 is out, as usual, at www.jvuletich.org/Cuis/Index.html. From the release notes: Main new in Cuis 2.3 * Fixes for internalized sources * Decompiler fixes by nice * Various code cosmetics fixes * Enhancements to prettyPrint by cmm * A fix to WeakRegistry by ul * Added BitBltTests to allow knowing if the VM is updated * A serious simplification of Morphic geometry, removing DisplayTransform * InteractiveErrorCorrection fixes by cao and jmv * Lots of minor fixes A big news, at least for me, is that I added a "Donate" button. So, you have a new way to help me keep developing Cuis. Cheers, Juan Vuletich

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Installing Seaside (was Installing Seaside - Green)
by Chris Cunnington 06 Apr '10

06 Apr '10

Hi Hannes, I see where you're going, and that's part of another way of installing. You want to ignore Seaside repository onsqueaksource.com unless you get a few things first. The way I'm describing wants you to go to squeaksource.com/MetacelloRepository. Then you see lots of ConfigurationOf*** files. Load the one you want. Open a Workspace. Type "ConfigurationOf*** load" then do it. Seaside3.0 takes easily seven minutes to load. Then in a workspace type WAKom startOn: 8080 and then do it. Then go to localhost:8080/seaside and you'll see the browse page. I have a bunch of videos on the squeak.org site. I haven't looked at them in about two months: http://www.squeak.org/Documentation/Installation/#h-5 They should have answers to all your questions including the method you tried first. If there's any problem with those videos or instructions, please let me know. Chris

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missing class of unknown package
by marcelo Cortez 06 Apr '10

06 Apr '10

Folks i'm trying to load 'SHP Shape-file format' , but is missing classes and don't find how load. there any way to track that package is a class? The Monticello does not indicate the dependencies. The missing class is BasicPolygonMorph2 tia Best regards MDC. Yahoo! Cocina Encontra las mejores recetas con Yahoo! Cocina. http://ar.mujer.yahoo.com/cocina/

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MessageNames: clicking on class names
by Frank Shearar 03 Apr '10

03 Apr '10

Hi, I'm not entirely sure how to contribute to the inbox. Well, I know enough to commit a change to the inbox :) I mean the social process aspect of things. So anyway, feel free to correct me on etiquette and protocol. I noticed that the new search morph in the docking bar will bring up class names as well as selector names. For instance, searching for "obj" will show things like "AbstractObjectsAsMethod". If you hit the browse button on these entries, though, nothing happens. Tools-fbs.221.mcz allows you to browse the class. (221 fixes a bug in 220, which otherwise holds the feature. I hadn't realised that if your search returns NO hits that MessageNames' selectorListIndex instvar would be nil.) frank

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OpenGL into morphic ala lumiere?
by Lawson English 02 Apr '10

02 Apr '10

More than likely, this is way too advanced for moi, but I spent about an hour rummaging through the Lumiere code for Pharo and just couldn't grok how the OpenGL rendering is directed to a morph instead of to raw coordinates on the main window. Is there some special property of Pharo that allows this kind of thing, or is there some relatively simple way in Squeak to direct OGL drawing to a morphic surface/canvas/thingie so it renders inside the boundaries of the morph when moved? Or does my question even make sense? Thanks. Lawson

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Caching MultiByteFileStream bug?
by Andreas Raab 01 Apr '10

01 Apr '10

Hi Levente - Could you check the failure of FileStreamTest>>testNextChunkOutOfBounds? This looks like it might be a problem with caching file stream behavior. If it's not (i.e., the infinite recursion is the 'expected' behavior) can we add something that addresses the issue? Thanks, - Andreas

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Copying the sources file
by Andreas Raab 01 Apr '10

01 Apr '10

Hi - I was just trying to implement the code for condensing the changes to the end of the sources file and ran into some 'interesting' issues. I would expect this to work: fullName := 'test1.sources'. "Copy sources file; change file name accordingly" FileStream forceNewFileNamed: fullName do:[:newFile| sourcesFile := SourceFiles at: 1. sourcesFile position: 0. FileDirectory default copyFile: sourcesFile toFile: newFile. newFile position = sourcesFile size ifFalse:[self error: 'File copy failed']. ]. But it fails. Then I tried something else: fullName := 'test2.sources'. "Copy sources file; change file name accordingly" FileStream forceNewFileNamed: fullName do:[:newFile| sourcesFile := SourceFiles at: 1. sourcesFile position: 0. [sourcesFile atEnd] whileFalse:[newFile nextChunkPut: sourcesFile nextChunk]. newFile position = sourcesFile size ifFalse:[self error: 'File copy failed']. ]. That fails to. Then I tried: fullName := 'test3.sources'. "Copy sources file; change file name accordingly" FileStream forceNewFileNamed: fullName do:[:newFile| sourcesFile := SourceFiles at: 1. sourcesFile position: 0. [sourcesFile atEnd] whileFalse:[newFile nextChunkPutWithStyle: sourcesFile nextChunkText]. newFile position = sourcesFile size ifFalse:[self error: 'File copy failed']. ]. That fails as well. Help! What am I doing wrong? How does one copy the sources file properly and why do the above methods not work? Cheers, - Andreas

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Re: immutibility
by Chris Cunnington 01 Apr '10

01 Apr '10

Hi Randal, I'm going to disagree with you pretty hard about this. I think what you're proposing sounds tedious beyond words. And I don't think it's what Squeak's about. Databases are tedious. Operating systems are tedious. Cincom and Gemstone obsess about databases and tedious minuta, because that's their job. I spent several days reading CentOS archives and I thought I would pass out, it was so dull. Squeak is not dull. It's about multimedia, 3D worlds, web development, desktop applications, etc. Squeak should always be first in space doing wild things. Whatever VPRI has up its sleeve we should look at and play with. Squeak is about programming for its own sake not somebody else's. One of the things that Pharo will have to contend with is sounding reasonable to other people. If they want to be appealing to business, they will have to listen to lots of stupidity from people who have databases and operating systems for brains. I think that's going to be a pretty unpleasant part of their adventure. That's not what Squeak's about. Jesse has some crazy idea about object memory? I say great. Fulmer wants to bring Cobalt to the Trunk? I say that's what we're all about. VPRI has some craziness called Ometa? Bring it on. Squeak is not now, nor should it ever be, about boring, reasonable plans. This is where the cool stuff happens. Dynabooks to the third world? Right on. If it weren't for the oddness of continuations, Seaside would be dull as dishwater. Andreas wants to throw generators into the Trunk? Are they nifty? Yes they are; so let's do it. Databases are for peasants. We are unique and occupy a unique position. Let's embrace that. Stop trying to turn us into shadows of Gemstone, Cimcom, or other merchants of tedium. If Kent Beck isn't happy with Squeak, I don't see it as our job to cater. There is nothing else on earth like us and what we do. Squeak is a never ending game of capture the flag. Chris

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