March 2016 - Pharo-dev - lists.pharo.org

Little how to
by stepharo March 9, 2016

March 9, 2016

Hi guys for the mooc I would like have a list of how to that students should look in the system and implement. The idea is to show to the participants that Pharo is open and that they can find information. For example, - extracting a sprite from a png file - access a time service of the web Now I would love to get your ideas and their solution. Stef

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Call about Numerical Methods in Pharo :)
by stepharo March 9, 2016

March 9, 2016

Hi guys I met Didier Besset and we had a great hacking session and discussions with Serge Stinckwich. Didier would like to help Pharo and the numerical part of it. ***Big thanks*** Didier. We would like to do several things: - Work on "Hows to" The numerical methods in Pharo is good but the gap between us and the math is too large :) so the idea is to have a series of "how to ..." - histomgram (simple, based on distribution) - Improve the SciPharo/NumPha (previously SciSmalltalk) library This morning we started to implement a ComponentPrincipalDecomposition by combining two of the objects available in SciPharo. Then we started to enhance the distributions to make sure that we can plug other distribution for having controlled random number. - Do a public call to know what is missing for you: this is this mail :) Didier would like to work on concrete cases. I love that attitude So tell us :) Hernan ?? Alex: ?? pvalue? better distribution? Vincent: covariance? CPA? Philippe: times series Serge R frames? Sami: Better random number and various distributions? - Organise a two day lectures with practices on concrete case in September with a recording session. Either at IRD Bondy or Lille. - Make sure that the Numerical Method book will get on lulu :) with a better cover and title :) Stef

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Re: [Pharo-dev] [squeak-dev] Re: [Vm-dev] strange array instance
by Eliot Miranda March 9, 2016

March 9, 2016

On Wed, Mar 9, 2016 at 3:08 AM, StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> wrote: > Hi eliot > > Do not worry. > Now would it be possible to have a test or something like that that would > help us > to > - document this part of the system > - check that the system is in a coherent state > > Stef > Yes, watch this space. I should have the work done by tomorrow. And the 64-bit system will be a tiny bit smaller and faster :-) On 09 Mar 2016, at 10:26, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > > Um, under /no/ circumstances do what I'm suggesting below. It will screw > up 320bit images completely. I've just turned odd SmallIntegers into > SmallFloat54's in 32-bit Squeak. I hope I won't destroy too many people's > images. This is perhaps my worst blunder. > > On Tue, Mar 8, 2016 at 10:38 AM, Eliot Miranda <eliot.miranda(a)gmail.com> > wrote: > >> Hi Pavel, >> >> On Tue, Mar 8, 2016 at 1:40 AM, Pavel Krivanek <pavel.krivanek(a)gmail.com> >> wrote: >> >>> Hi, >>> >>> there is a strange array of size 1024 in the Pharo image that is not >>> eaten by garbage collector even if no object points to it. I guess it is >>> related to Spur. >>> >>> ((Array allInstances select: [ :i | i size = 1024 ]) >>> select: [ :a | a second = SmallInteger ]) pointersTo >>> >>> What is it and is it accessible somehow? >>> >> >> It is indeed the first class table page. It looks like an old bug. The >> oldest Spur image I can start up has the problem. The way that class >> table pages are hidden is that they have a class index which is not that of >> Array. Array is at index 52 in the class table (51 zero-relative, Array >> identityHash = 51), but it is also at index 17 (16 zero-relative). Array >> allInstances looks for objects whose class index is 51, hence not seeing >> the class table pages, which all (but the first) have class index 16. >> >> Luckily we can fix the problem easily, and we can fix another problem at >> the same time, which is that SmallFloat64 has the wrong hash. >> >> The class table is two-level; a (hidden) array of Arrays. Classes are in >> the class table at their identityHashes (so that to instantiate a class one >> copies the class's identity hash into the classIndex of the new instance >> instead of having to search the class table). But when SmallFloat64 was >> created in the 32-bit image I forgot to give it the right hash and store it >> in the class table. (there are no SmallFloat64 instances in a 32-bit >> image, only in 64-bits). >> >> So we can first change SmallFloat64's hash to 3, which is what the Spur >> 64-bit VM and image require, and enter it into the first class table page, >> and then we can make the first class table page disappear. >> >> >> | firstClassTablePage clone | >> "The first class table page is the first Array instance. Of course this >> is a bug." >> firstClassTablePage := Array someInstance. >> >> "It should contain only nil and classes." >> self assert: (firstClassTablePage allSatisfy: [:e| e == nil or: [e >> isBehavior]]). >> >> "And its first 17 elements should only be the immediate classes and >> Array, since Array is used as the class pun for class table pages, with >> index 17 (16 zero-relative)" >> self assert: (firstClassTablePage first: 17) asSet = {nil. SmallInteger. >> Character. Array} asSet. >> >> "It just so happens that the second Array is the specialSelectors" >> self assert: Array someInstance nextInstance == Smalltalk >> specialSelectors. >> >> "Store SmallFloat64 in the first class table page at index 4 (3 >> zero-relative)." >> firstClassTablePage at: 4 put: SmallFloat64. >> >> "Use the secret set identity hash primitive to set SmallFloat64's >> identityHash to 3." >> SmallFloat64 tryPrimitive: 161 withArgs: #(3). >> >> "Now create an object that looks like Array class, but has identityHash >> 16." >> "Take a shallow copy of Array class." >> clone := Array shallowCopy. >> "Change it into an Array." >> Array adoptInstance: clone. >> "Set its identityHash to 16." >> clone tryPrimitive: 161 withArgs: #(16). >> "Use the adoptInstance: primitive to ``set the class of the >> firstClassTablePage to the cone''. >> or, more accurately, to set the firstClassTablePage's class index to 16." >> clone tryPrimitive: 160 withArgs: {firstClassTablePage} >> >> >> With the above done, we can check that everything is ok." >> self assert: SmallFloat64 identityHash = 3. >> self assert: Array someInstance == Smalltalk specialSelectors. >> "A class table page is 1024 slots, contains only nil or behaviours, and >> contains at least one behaviour (is not all nils). There shouldn't be any >> that we can find." >> self assert: (self systemNavigation allObjects select: [:o| o isArray >> and: [o size = 1024 and: [(o allSatisfy: [:e| e == nil or: [e isBehavior]]) >> and: [o anySatisfy: [:e| e isBehavior]]]]]) size = 0 >> >> >> I recommend you create an update map. Then create a version of kernel >> with a post-load action, written something like this: >> >> >> (Array someInstance size = 1014 >> and: [(Array someInstance allSatisfy: [:e| e == nil or: [e isBehavior]]) >> and: [(firstClassTablePage first: 17) asSet = {nil. SmallInteger. >> Character. Array} asSet]]) ifTrue: >> [| firstClassTablePage clone | >> firstClassTablePage := Array someInstance. >> self assert: (firstClassTablePage allSatisfy: [:e| e == nil or: [e >> isBehavior]]). >> self assert: (firstClassTablePage first: 17) asSet = {nil. SmallInteger. >> Character. Array} asSet. >> firstClassTablePage at: 4 put: SmallFloat64. >> SmallFloat64 tryPrimitive: 161 withArgs: #(3). >> clone := Array shallowCopy. >> Array adoptInstance: clone. >> clone tryPrimitive: 161 withArgs: #(16). >> clone tryPrimitive: 160 withArgs: {Array someInstance} >> self assert: SmallFloat64 identityHash = 3. >> self assert: (Array someInstance first: 4) = {nil. SmallInteger. >> Character. SmallFloat64}] >> >> Then create a second update map to ensure that that version of Kernel is >> loaded. >> >> I will do this for Squeak immediately. >> >> >> Apologies. >> >> P.S. Interestingly enough, it shows what a horrible security hole the >> debugger primitives tryPrimitive:withArgs: and tryNamedPrimitive:withArgs: >> are. >> >> Cheers, >>> -- Pavel >>> >> >> _,,,^..^,,,_ >> best, Eliot >> > > > > -- > _,,,^..^,,,_ > best, Eliot > > > -------------------------------------------- > StÃ©phane Ducasse > http://stephane.ducasse.free.fr > http://www.synectique.eu / http://www.pharo.org > 03 59 35 87 52 > Assistant: Julie Jonas > 03 59 57 78 50 > 03 59 35 86 16 > > S. Ducasse - Inria > 40, avenue Halley, > Parc Scientifique de la Haute Borne, BÃ¢t.A, Park Plaza > Villeneuve d'Ascq 59650 > France > > > > > -- _,,,^..^,,,_ best, Eliot

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[pharo-project/pharo-core]
by GitHub March 9, 2016

March 9, 2016

Branch: refs/tags/50633 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] 2227ab: 50633
by GitHub March 9, 2016

March 9, 2016

Branch: refs/heads/5.0 Home: https://github.com/pharo-project/pharo-core Commit: 2227ab165dd3b0114bf7db52f66d1c6beedf9974 https://github.com/pharo-project/pharo-core/commit/2227ab165dd3b0114bf7db52… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2016-03-09 (Wed, 09 Mar 2016) Changed paths: M ConfigurationOfFastTable.package/ConfigurationOfFastTable.class/instance/baselines/baseline03_.st M ConfigurationOfFastTable.package/ConfigurationOfFastTable.class/instance/symbolic versions/stable_.st A ConfigurationOfFastTable.package/ConfigurationOfFastTable.class/instance/versions/version0101_.st A ConfigurationOfRubric.package/ConfigurationOfRubric.class/class/loading/load.st M ConfigurationOfRubric.package/ConfigurationOfRubric.class/instance/symbolic versions/stable_.st A ConfigurationOfRubric.package/ConfigurationOfRubric.class/instance/versions/version210_.st A ConfigurationOfRubric.package/ConfigurationOfRubric.class/instance/versions/version211_.st M Kernel.package/Point.class/instance/truncation and round off/ceiling.st M Kernel.package/Point.class/instance/truncation and round off/floor.st M Kernel.package/Point.class/instance/truncation and round off/rounded.st M Kernel.package/Point.class/instance/truncation and round off/truncated.st A Morphic-Base.package/CircleMorph.class/instance/initialization/defaultBounds.st A Morphic-Base.package/CircleMorph.class/instance/initialization/defaultColor.st R Morphic-Base.package/CircleMorph.class/instance/initialization/initialize.st R Morphic-Widgets-FastTable.package/FTDataSource.class/instance/accessing/elementAt_.st A Morphic-Widgets-FastTable.package/FTDataSource.class/instance/drag and drop/passengerAt_.st A Morphic-Widgets-FastTable.package/FTDataSource.class/instance/private/elementAt_.st M Morphic-Widgets-FastTable.package/FTTableMorph.class/instance/drag and drop/startDrag_.st M Rubric.package/RubParagraph.class/instance/editing/actionAttributesUnder_event_do_.st M Rubric.package/RubParagraph.class/instance/editing/click_for_controller_.st R Rubric.package/RubSHTextStylerST80.class/instance/private/addLinkAttributesFor_in_to_.st R Rubric.package/RubSHTextStylerST80.class/instance/private/resolveTextLinkFor_.st R Rubric.package/RubSHTextStylerST80.class/instance/visiting rb nodes/visitLiteralNode_.st M Rubric.package/RubSHTextStylerST80.class/instance/visiting rb nodes/visitMessageNode_.st M Rubric.package/RubSHTextStylerST80.class/instance/visiting rb nodes/visitMethodNode_.st R Rubric.package/RubTextClassLink.class/README.md R Rubric.package/RubTextClassLink.class/class/instance creation/className_.st R Rubric.package/RubTextClassLink.class/class/instance creation/class_.st R Rubric.package/RubTextClassLink.class/definition.st R Rubric.package/RubTextClassLink.class/instance/accessing/className_.st R Rubric.package/RubTextClassLink.class/instance/evaluating/actOnClick_for_in_editor_.st R Rubric.package/RubTextClassLink.class/instance/system primitives/className.st R Rubric.package/RubTextLink.class/README.md R Rubric.package/RubTextLink.class/definition.st R Rubric.package/RubTextLink.class/instance/testing/mayActOnEvent_.st R Rubric.package/RubTextMethodLink.class/README.md R Rubric.package/RubTextMethodLink.class/class/instance creation/selector_.st R Rubric.package/RubTextMethodLink.class/class/instance creation/selector_senders_.st R Rubric.package/RubTextMethodLink.class/definition.st R Rubric.package/RubTextMethodLink.class/instance/accessing/selector.st R Rubric.package/RubTextMethodLink.class/instance/accessing/selector_.st R Rubric.package/RubTextMethodLink.class/instance/accessing/senders_.st R Rubric.package/RubTextMethodLink.class/instance/event handling/actOnClick_for_in_editor_.st R Rubric.package/RubTextMethodLink.class/instance/initialization/initialize.st R Rubric.package/RubTextVariableLink.class/README.md R Rubric.package/RubTextVariableLink.class/class/instance creation/variableName_.st R Rubric.package/RubTextVariableLink.class/definition.st R Rubric.package/RubTextVariableLink.class/instance/accessing/variableName.st R Rubric.package/RubTextVariableLink.class/instance/accessing/variableName_.st R Rubric.package/RubTextVariableLink.class/instance/evaluating/actOnClick_for_in_editor_.st A Rubric.package/extension/TextAttribute/instance/rubMayActOnEvent_.st A Rubric.package/extension/TextClassLink/instance/rubActOnClick_for_in_editor_.st A Rubric.package/extension/TextLink/instance/rubMayActOnEvent_.st A Rubric.package/extension/TextMethodLink/instance/rubActOnClick_for_in_editor_.st A Rubric.package/extension/TextVariableLink/instance/rubActOnClick_for_in_editor_.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50632.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50633.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50632.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50633.st M ScriptLoader50.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st Log Message: ----------- 50633 16537 FTDataSource>>elementAt: should not be there. https://pharo.fogbugz.com/f/cases/16537 16330 Text*Link users should use RubText*Link https://pharo.fogbugz.com/f/cases/16330 17774 Use isIntegerPoint instead of "x isInteger and: [ y isInteger ]" in some Point methods https://pharo.fogbugz.com/f/cases/17774 17773 CircleMorph should use default initialize methods instead of #initialize https://pharo.fogbugz.com/f/cases/17773 http://files.pharo.org/image/50/50633.zip

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strange array instance
by Pavel Krivanek March 9, 2016

March 9, 2016

Hi, there is a strange array of size 1024 in the Pharo image that is not eaten by garbage collector even if no object points to it. I guess it is related to Spur. ((Array allInstances select: [ :i | i size = 1024 ]) select: [ :a | a second = SmallInteger ]) pointersTo What is it and is it accessible somehow? Cheers, -- Pavel

4 8

Last modified method in nautilus does not show the recently modified
by stepharo March 8, 2016

March 8, 2016

Hi guys I'm trying to do a video (I will not show the feature) but Last modified method in nautilus does not show the recently modified Stef

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[pharo-project/pharo-core]
by GitHub March 8, 2016

March 8, 2016

Branch: refs/tags/50632 Home: https://github.com/pharo-project/pharo-core

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[pharo-project/pharo-core] ec187b: 50632
by GitHub March 8, 2016

March 8, 2016

Branch: refs/heads/5.0 Home: https://github.com/pharo-project/pharo-core Commit: ec187b5b9722b87bb9cf893a00ce2d9c95b5b9ea https://github.com/pharo-project/pharo-core/commit/ec187b5b9722b87bb9cf893a… Author: Jenkins Build Server <board(a)pharo-project.org> Date: 2016-03-08 (Tue, 08 Mar 2016) Changed paths: R Collections-Sequenceable.package/Array.class/instance/private/refersToLiteral_.st R Kernel.package/AdditionalMethodState.class/instance/testing/refersToLiteral_.st R Kernel.package/Behavior.class/instance/testing/isEphemeronClass.st R Kernel.package/Behavior.class/instance/testing/isImmediateClass.st M Kernel.package/CompiledMethod.class/instance/literals/refersToLiteral_.st R Kernel.package/Object.class/instance/pointing to/refersToLiteral_.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50631.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - scripts/script50632.st R ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50631.st A ScriptLoader50.package/ScriptLoader.class/instance/pharo - updates/update50632.st M ScriptLoader50.package/ScriptLoader.class/instance/public/commentForCurrentUpdate.st Log Message: ----------- 50632 16368 refersToLiteral: should (for now) just call hasLiteralThorough: https://pharo.fogbugz.com/f/cases/16368 17768 remove again isEphemeronClass and isImmediateClass https://pharo.fogbugz.com/f/cases/17768 http://files.pharo.org/image/50/50632.zip

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[pharo-project/pharo-core]
by GitHub March 8, 2016

March 8, 2016

Branch: refs/tags/50631 Home: https://github.com/pharo-project/pharo-core

1 0