Vm-dev January 2010

vm-dev@lists.squeakfoundation.org

28 participants
47 discussions

Multiprocessing with Squeak
by Levente Uzonyi 29 Jan '10

29 Jan '10

Hi, I had an idea a few days ago and even though I don't have the time or knowledge to try it myself, I just can't get it out of my head. The idea is to let an interpreter use two images at once. One of them is read only "fully working" image let's call it S (source), the other is empty (contains no objects), writeable, possibly generated on the fly, let's call it W (working). The vm knows if an object is in S or W by checking the object pointer. Whenever an object in S is about to be modified, a copy is created in W and all references to it are changed to the new one (which means that more than one object might have to be copied). This means a slower startup, but once all necessary objects are copied performance would be normal. (This approach is similar to the way sources are handled today: the sources file is read only, new source code goes to the changes file.) What are the benefits? - the source image can be shared among interpreters (even vms) - the garbage collector has much less work, since it only has to check the objects in W How does it help with multiprocessing? - combine it with HydraVM, it might give Erlang-like capabilities (cheap and fast processes) - reduces memory usage if multiple interpreters (vms) use the same source image Possible caveats? - too many objects might have to be copied after startup (this is solveable, see below) - too many objects might have to be copied overall (this is unlikely, but who knows) - ? (you name it) Possible enhancements - let the interpreter use a not-empty, possibly user-specified, W image for quick startup Opinions? Ideas? Levente

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Bulletproof BitBltSimulation against failure in #lockSurfaces
by Josh Gargus 29 Jan '10

29 Jan '10

Hi David, Can you please add the following patch to the VMMaker source code? It's a one-line fix to VMMaker-dtl.156 from SourceForge. It fixes a bug where #warpBits doesn't check the return value of #lockSurfaces, and can potentially crash when execution continues after the failed lock attempt. Thanks, Josh

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Fwd: [Pkg-squeak-devel] Bug#567366: `memoryAllocate' implicitly converted to pointer
by Bert Freudenberg 29 Jan '10

29 Jan '10

It seems we're missing some declaration? - Bert - Begin forwarded message: > > Resent-From: dann frazier <dannf(a)debian.org> > From: dann frazier <dannf(a)debian.org> > Date: 28. Januar 2010 09:55:58 GMT-08:00 > Resent-To: debian-bugs-dist(a)lists.debian.org > To: submit(a)bugs.debian.org > Resent-Cc: Debian Squeak Team <pkg-squeak-devel(a)lists.alioth.debian.org> > Subject: [Pkg-squeak-devel] Bug#567366: `memoryAllocate' implicitly converted to pointer > Reply-To: dann frazier <dannf(a)debian.org>, 567366(a)bugs.debian.org > > Source: squeak-vm > Version: 3.11.3+svn2147-1 > Severity: serious > Usertags: implicit-pointer-conversion > > Our automated buildd log filter[1] detected a problem that is likely to > cause your package to segfault on architectures where the size of a > pointer is greater than the size of an integer, such as ia64 and amd64. > > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/bitstream.c:40 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/libmpeg3.c:47 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/mpeg3atrack.c:42 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/mpeg3demux.c:1060 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/mpeg3io.c:61 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/mpeg3title.c:41 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/mpeg3vtrack.c:42 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/audio/mpeg3audio.c:45 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/video/mpeg3video.c:170 > Function `memoryAllocate' implicitly converted to pointer at /build/buildd/squeak-vm-3.11.3+svn2147/platforms/Cross/plugins/Mpeg3Plugin/libmpeg/video/slice.c:48 > > This is often due to a missing function prototype definition. > For more information, see [2]. > > Though it is guaranteed that this codepath will cause a segfault on certain > architectures, it is not guaranteed that this codepath would ever be executed > (e.g., if the returned pointer is never dereferenced). However, this bug > does prevent the ia64 buildd from successfully building this package, resulting > in a practical FTBFS issue and warranting the serious severity. > > [1] http://people.debian.org/~dannf/check-implicit-pointer-functions > [2] http://wiki.debian.org/ImplicitPointerConversions > > > > _______________________________________________ > Pkg-squeak-devel mailing list > Pkg-squeak-devel(a)lists.alioth.debian.org > http://lists.alioth.debian.org/mailman/listinfo/pkg-squeak-devel

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a Small feedback for the VM usability
by Laval Jannik 28 Jan '10

28 Jan '10

Hi John, I begin to use the 5.4b1 64-32bit with pharo-core. And I have two small improvements to propose for usability: - since in 4.2.2, the mouse-pointer changes when I resize a window, in 5.4b1, this behavior has desappeared. It would be really cool to have it :) - The second thing is: when I use my big screen, I open the window in large. So when I save and quit, then I open my image on my small screen, the height is automatically resized, but not the width. So, maybe you already know these things. Do you have a bug-report for vm ? I would do some feedback later, when I will more use the vm5.4 Cheers --- Jannik Laval PhD Student - Rmod Team - INRIA Certified Project Management Associate (IPMA) http://www.jannik-laval.eu http://rmod.lille.inria.fr ---

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InterpreterSimulator UI
by Ang BeePeng 28 Jan '10

28 Jan '10

Hi. I having problem make InterpreterSimulator UI work. I think InterpreterSimulator UI gives more details about call stack compare to debugging "interpreterSimulator test" right? Here's a video of what I get.. http://askoh.net/mmu/beepeng/Smalltalk/Squeak/video/20100127b-InterpreterSi… Thanks. Ang Beepeng -- View this message in context: http://n4.nabble.com/InterpreterSimulator-UI-tp1311508p1311508.html Sent from the Squeak vm-dev mailing list archive at Nabble.com.

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Squeak on Maemo 5 (N900)
by K. K. Subramaniam 28 Jan '10

28 Jan '10

Hi, Has anyone got Squeak vm (3.11.3-2135) to work fullscreen and successfully revert to windowed mode on the Maemo 5 (Nokia N900)? In fullscreen mode, the Maemo main button would pop up. On reverting, the bottom 56px of Squeak window would get clipped by the native window manager. Subbu

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Mac VM 5.4b2 ships
by John M McIntosh 25 Jan '10

25 Jan '10

I've push the latest cocoa based 32/64bit macintel/powerpc Squeak VM 5.4b2 There seemed to be a drawing problem, which pointed to an issue with the definition of drawRect:, this should be fixed. Fixed the open file dialog so that it only lets you open *.image files, versus *.changes Fixed an issue with leaking NSCursors on cursor changes. I altered the behaviour of the resize window box, now when you click it changes the cursor back to an arrow. Look for the VM in the regular places found via http://smalltalkconsulting.com/squeak.html or ftp://ftp.smalltalkconsulting.com/ or http://homepage.mac.com/johnmci/FileSharing.html Squeak 64-32 5.4b2.app.zip This *beta* VM runs in 32 or 64 bit mode on macIntel, and 32bit mode on powerpc to support Squeak 32bit images. Includes the freetype plugin, and requires os-x 10.5 or higher. -- =========================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> Twitter: squeaker68882 Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com ===========================================================================

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how to add FTPlugin
by laurent laffont 25 Jan '10

25 Jan '10

Hi, I'm a real newbie on vm stuff. I've managed to compile squeak vm 3.11-3.2135 on Linux. Now I would like to add FTPlugin as Pharo needs it, but I cannot find where to get it nor how to include it in the build process. :( Cheers, Laurent

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CfP: Dynamic Languages Workshop @ TOOLS
by Michael Haupt 25 Jan '10

25 Jan '10

... apologies for cross-posting and multiple copies! 4th Workshop on Dynamic Languages and Applications (DYLA 2010) categories: programming languages, software engineering, computer science When: Jun 28, 2010 Where: Malaga, Spain Submission Deadline: Mar 31, 2010 Notification Due: May 14, 2010 Final Version Due: May 31, 2010 link: http://scg.unibe.ch/wiki/events/dyla2010 Call For Papers The DYLA Workshop series focuses on the revival of dynamic languages. These days, dynamic languages (like Ruby, Python, JavaScript, Lua, etc…) are getting ever more popular. This is a call to arms for academia! We need to explore the future of dynamic languages through its human aspects and technical issues. We also ought to look back and pick up solutions from existing dynamic languages (such as Scheme, Smalltalk, or Self) to be rediscovered and spread around. Goal and Topics The goal of this workshop is to act as a forum where we can discuss dynamic languages and their applications. Topics of interest include any topic relevant in applying and/or supporting dynamic languages: Ruby, Python, Groovy, JavaScript, Lua, Clojure, Lisp, Scheme, Smalltalk, Self, ABCL, Prolog, and many more… Human aspects of dynamic languages, such as - empirical studies about the application of dynamic languages - best practices and patterns specific to dynamic languages - program correctness through unit testing (as opposed to types) - improved or novel IDE support for dynamic languages - use of dynamic features by library & framework developers - scripting of static application with dynamic languages - reverse engineering and analysis of dynamic applications Technical aspects of dynamic languages, such as - what features make a language a dynamic one? - agents, actors, active object, distribution, concurrency and mobility - delegation, prototypes, mix-ins, traits - first-class closures, continuations, environments - reflection and meta-programming - automated reasoning about programs written in dynamic languages - (concurrent/distributed/mobile/aspect) virtual machines - optimization of dynamic languages - multi-paradigm & static/dynamic-marriages - type systems for dynamic languages - (dynamic) aspects for dynamic languages - higher-order objects & messages - …other exotic dynamic features Submissions The workshop will have a demo-oriented style. The idea is to allow participants to demonstrate new and interesting features and discuss what they feel is relevant for the dynamic language community. Participants need to submit a 2–4 page position paper of their work in ACM, sig-alternate.cls format. At the workshop, participants will be asked to give 10-minute “lightning demos” of their contributions. Submission page is https://www.easychair.org/login.cgi?conf=dyla10 Organizers - Alexandre Bergel, Univ of Chile, - Carl Friedrich Bolz, Heinrich-Heine-Univ, Düsseldorf, Germany - Simon Denier, INRIA Lille, France - Michael Haupt, HPI Potsdam, Germany - Adrian Kuhn, Univ of Bern, Switzerland Program Committee - Tom Dinkelaker, Technische Univ Darmstadt, Germany - Johan Fabry, Univ of Chile - Matthew Flatt, Univ of Utah, USA - Stephan Herrmann, TU Berlin, Germany - Abram Hindle, Univ of Waterloo, Canada - Kasper Lund, Google, Denmark. - Michael Perscheid, HPI Potsdam, Germany - Rodolfo Toledo, Univ of Chile - Niko Schwarz, Univ of Bern, Switzerland - Peter Sommerlad, HSR Rapperswil, Switzerland - Alessandro Warth, Viewpoints Research Institute, USA - Vadim Zaytsev, Univ of Koblenz, Germany For further information, please visit our website or follow us on twitter - http://bit.ly/dyla2010 - http://twitter.com/dyla2010

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Mac VM image path in one-click images
by keith 24 Jan '10

24 Jan '10

Hi, currently in one-click images the actual image is contained in ./ Contents/Resources is it possible to inform the vm to launch an image in ./ or a different directory of the package? Keith

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Vm-dev January 2010