January 2015 - Pharo-dev - lists.pharo.org

New Cog VMs available
by Eliot Miranda Feb. 2, 2015

Feb. 2, 2015

at http://www.mirandabanda.org/files/Cog/VM/VM.r3236/ CogVM binaries as per VMMaker.oscog-eem.1029/r3236 Fix stupid, stupid bug in copying vm profile samples between buffers when the circular buffer index has wrapped. Fix monumental blunder in jitted store-check code. The saved registers mask needs to be the *or* of the value reg and the caller-saved registers, not the *and*!! Make the pin primitives Spur-only. Never inline mapStackPages, for debugging. Spur: Reduce the max num literals in the alternate header format to 15, and steal the bit for the Sista optimized method flag. Make postBecomeAction's stack sweep only occur in Spur (fix regression). Refactor so that the scan is not inlined. Don't assume newMethod is non-immediate in post-become actions. Fix stack adjust slip in primitiveSmallFloatTimesTwoPower Make ensureBehaviorHash: fail for uninitialized behaviours and hence fix the Behavior basicNew basicNew hang. Optionalize some api methods the Spur Cogit doesn't use. Rename and correct ensureSemaphoreForwardedThroughContext: to ensureSemaphoreUnforwardedThroughContext:, its intended function. Make shouldRemapObj: filter-out objects already in newSpace since mapStackPages, via mapInterpreterOops, can visit objects twice in a scavenge, GC, compact sequence. Make sure the caller (& saved) context(s) in base frames stack page are followed post-become in followForwardingPointersInStackZone:. Fix bad bug introduced in become changes in VMMaker.oscog-eem.841 through 844. The class table contains puns, e.g. using Array and WeakArray. These class index puns must not mislead the allInstances primitive into concluding that the class in question is at multiple indices and wrongly purge it. Fix slip in primitivePin. Also be lenient w.r.t. unpinning married contexts. Move the check down into StackInterpreter's version. This allows e.g. self allObjectsDo: [:o| o unpin] Bow to the inevitable and add a manual override for primitive accessor depth. Use it in at: & at:put:. If manual override is not used then the automatically computed depth is too deep because of context access. Newspeak: Integrate Ryan's newer absent receiver sends, which first apeared in VMMaker.oscog-eem.919, abandoned because of Glue issues now resolved. Includes nice refactoring of absent send argument marshalling into its own routine. LargeIntegersPlugin: Remove/fix assumption of 32-bit digit length in normalization routines. -- best, Eliot

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athens font rendering and subpixel antialiasing
by Nicolai Hess Feb. 2, 2015

Feb. 2, 2015

Anyone knows, why the text rendering with athens (cairo) looks slightly different than the freetypeplugin one? attached is a screenshot, left side athen right side (morphic) freetypeplugin. It "looks" like the cairo freetype fontrendering uses CAIRO_ANTIALIAS_GRAY, no colored subpixel antialiasing. But the font options do define antialiase subpixel and a subpixel ordering RGB. This is on windows 7 with the latest vm, does it look different on other Systems? nicolai

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OSProcess stdErr issue on Windows
by Ben Coman Feb. 1, 2015

Feb. 1, 2015

On Windows 7, trying to execute a non-existent program as follows... OSProcess command: 'notepadXX.exe' ...causes an MNU in ExternalWindowsOSProcess>>value. This is due to writing to stderr where "self initialStdErr" returns nil, seemingly due to ExternalWindowsOSProcess missing the #initialize and #setDefaults of E xternalUnixOSProcess. Now I understand that stderr is problematic in general on Windows. The following statements... OSProcess thisOSProcess stdErr nextPutAll: 'test'. FileStream stderr nextPutAll: 'test'. ...both work fine on OSX, but fail on Windows with the error "FileWriteError: File stderr is closed" The result is the same on both Pharo 4 and Squeak 4.5. (Squeak also brings up a bottom message bar saying... "# To disable: F2 -> 'debug options' -> 'show console on errors' WARNING: Manufactured file handle detected!") Pharo has a workaround for the general issue by creating a disk file named 'stderr' as follows... FileStream class >> standardIOStreamNamed: moniker forWrite: forWrite self flag: #todo. "This is an ugly hack, while waiting for a real fix for windows. There several problems with this approach, but it allow us to run tests, etc." Smalltalk os isWin32 ifTrue: [ [ ^ MultiByteFileStream forceNewFileNamed: moniker asString ] on: CannotDeleteFileException do: [ "HACK: if the image is opened a second time windows barks about the already opened locked file" ^ MultiByteFileStream forceNewFileNamed: moniker asString, '_', (Random new nextInt: SmallInteger maxVal) asString ]]. So to address the MNU for OSProcess? 1. wrap the "self initialStdErr" with an #ifNil: check 2. Squeak adopt the Pharo workaround, then lean on that to define #initialize and #setDefaults for ExternalWindowsOSProcess 3. real fix for stderr (outside of OSProcess?) 4. wont fix 5. other? Note that this is not a burning issue for me. I am just cleaning out old issues that I logged in the Pharo bug tracker. If the answer if (4.) I'll just close the issue [1]. For both Squeak and Pharo, I loaded ConfigurationOfOSProcess-ThierryGoubier.33 from... MCHttpRepository location: 'http://smalltalkhub.com/mc/Pharo/MetaRepoForPharo40/main' (Perhaps someone with access can copy that to the main repo) cheers -ben [1] https://pharo.fogbugz.com/default.asp?11615

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Tools for automatic recognition of Design Patterns
by Nevena Milojkovic Feb. 1, 2015

Feb. 1, 2015

Hi, Can anyone suggest me tool for automatic design patterns detection in Smalltalk? Cheers, Nevena Milojkovic ââââââââ Nevena Milojkovic Research assistant Software Composition Group Institute of Computer Science and Applied Mathematics University of Bern email: nevena(a)iam.unibe.ch office phone: +41 (0)31 511 7639 webpage: http://scg.unibe.ch/staff/Milojkovic

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Fwd: 14827 ProtoObject>>pointersTo failing circular references
by Ben Coman Jan. 31, 2015

Jan. 31, 2015

I am revisiting my PointerDetective tool, which relies heavily on ProtoObject>>pointersTo. The example I recorded at the repository home page is currently locking & crashing the image due to #pointersTo being unable to handle the circular reference. This "must" have been working on Windows at least around August 2014, but I've been unable to reproduce a working case since my Windows laptop died and I've since moved to OSX. On OSX, in a fresh image 40467 and latest vm 402, the following crashes the image... testObject := 'TEST'. ref1 := { testObject. nil }. ref2 := { ref1 }. ref3 := { ref2 }. ref1 at: 2 put: ref3. "note the reference loop this creates" testObject pointersTo inspect. OSX Memory Monitor shows memory usage shoot from 50MB to >500MB in a few seconds, then usually the image crashes, but sometimes just hangs. I've logged... https://pharo.fogbugz.com/default.asp?14827 cheers -ben

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SciSmalltalk -> SciTalk
by stepharo Jan. 31, 2015

Jan. 31, 2015

Hi serge do we migrate the code to another repo with a nicer name? Then DHB ->Sci Stef

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[pharo-project/pharo-core] 6ecd67: 40470
by GitHub Jan. 31, 2015

Jan. 31, 2015

Branch: refs/heads/4.0 Home: https://github.com/pharo-project/pharo-core Commit: 6ecd6769c54f243508d223f3c827d5c5c669f8ca https://github.com/pharo-project/pharo-core/commit/6ecd6769c54f243508d223f3… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2015-01-31 (Sat, 31 Jan 2015) Changed paths: M Announcements-Help.package/AnnouncementsTutorial.class/class/pages/step2.st M Graphics-Primitives.package/Color.class/class/instance creation/colorFromPixelValue_depth_.st A Graphics-Tests.package/ColorTest.class/instance/tests/test32BlackColorTranformation.st A Graphics-Tests.package/FormTest.class/instance/tests/test32BitFormBlackShouldStayBlackAfterSave.st M HelpSystem-Core.package/CustomHelp.class/class/editing/accept_title_contents_.st M HelpSystem-Core.package/CustomHelp.class/class/editing/edit_.st M Kernel.package/Duration.class/instance/converting/asMinutes.st M KernelTests.package/DurationTest.class/instance/tests/testAsMinutes.st M Polymorph-Widgets.package/MorphicUIManager.class/instance/ui requests/openDebuggerOn_context_label_contents_fullView_.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - scripts/script470.st A ScriptLoader40.package/ScriptLoader.class/instance/pharo - updates/update40470.st M ScriptLoader40.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st M Tests.package/SystemNavigationOnNewlyCreatedEnvironmentTest.class/instance/testing/testEnsureDefaultEnvironmentNotUsed.st Log Message: ----------- 40470 14825 Correct spelling of "orginal" https://pharo.fogbugz.com/f/cases/14825 13215 Duration>>#asMinutes should use full precision https://pharo.fogbugz.com/f/cases/13215 14619 Strange behavior of TestRunner-Icon https://pharo.fogbugz.com/f/cases/14619 14808 Make Help file editing in Pharo 4.0 work again and ease it by using <script> pragma in generated methods https://pharo.fogbugz.com/f/cases/14808 http://files.pharo.org/image/40/40470.zip

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[pharo-project/pharo-core]
by GitHub Jan. 31, 2015

Jan. 31, 2015

Branch: refs/tags/40470 Home: https://github.com/pharo-project/pharo-core

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Create window group for Playground
by Torsten Bergmann Jan. 30, 2015

Jan. 30, 2015

Previous (and still included) Workspace, Transcript and Nautilus provide Window grouping by selecting "Create window group" from the window menu and then dragging two windows onto each other. They are grouped together in one single window then and each one gets a tab. Looks like Playground does not support this feature yet - so currently I end up with many many windows which for me is a step backwards compared to working with workspaces in Pharo 3.0 What is necessary to provide this for the Playground so we have a common behavior for all the tools and a cleaner desktop? Thanks T.

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Plague Doctor
by Roberto Minelli Jan. 30, 2015

Jan. 30, 2015

To follow Stefâs advice of advertising our projects, here is the Plague Doctor! During development your Pharo IDE will quickly become overcrowded with unused windows. The Plague Doctor is a tool, inspired by Autumn Leaves, that helps you to mitigate this issue by closing the windows that you are less likely to use in the future. If you want to try our prototype, please install it with the following script or ask me for a quick demo (I am Lille for the PharoDays!). Gofer new smalltalkhubUser: 'RobertoMinelli' project: 'PlagueDoctor'; package: 'ConfigurationOfPlagueDoctor'; load. (Smalltalk at: #ConfigurationOfPlagueDoctor) loadDevelopment. http://smalltalkhub.com/#!/~RobertoMinelli/PlagueDoctor P.s. If you report a problem or a feature request, please file in an entry https://github.com/RobertoMinelli/PlagueDoctor/issues

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