December 2021 - Pharo-dev - lists.pharo.org

Sockets not working under heavy VM load?
by Pavel Krivanek Oct. 3, 2023

Oct. 3, 2023

Hi, we have some performance issues with Glorp over P3 and, after some investigation, I have a theory that could explain it. And I would like to know your opinion if it is correct. To reproduce this issue, you can try something easy. Just create a process with normal or higher priority that will try to read something from a socket. And, in parallel, do in a separate thread an operation that takes all the processor time for several seconds. ```` [ 5 seconds wait. Time now traceCr. ZnClient new url: 'https://www.google.com'; get. Time now traceCr. ] forkAt: 60. [1000 timesRepeat: [ 10000 factorial ] ] timeToRun ```` (you may try a different safe server address) The processes run in parallel until the time when the first process tries to obtain data from the socket. Then it hangs and waits until finishing of the second process. My theory is that the VM socket plugin is able to receive incoming data from the connection and save it into the buffer. In the meantime, the reading process is waiting on the socket semaphore. But it looks like the plugin is not able to release the semaphore while the VM is actually doing something. It needs to wait until the VM has nothing useful to do, and then it is finally able to release the semaphores so Pharo processes are resumed and can start to read. Is my theory right? Cheers, -- Pavel

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Recommendation for password encryption?
by Mariano Martinez Peck Sept. 30, 2022

Sept. 30, 2022

Hi guys. Some time ago I asked about the best way to encrypt a password. Some of the recommendations I got was: 1) Generally for passwords you do not write a decrypt method for security purposes (eg you do not want people to be able to reverse engineer the encrypted password easily) 2) put a little salt 3) There is http://www.squeaksource.com/Cryptography/PasswordHashingFFI 4) I should not decrypt password but instead I should compare both encrypted versions to see if they are equal. My scenario is the following. I need to store database passwords in text files. So I don't want to let them as plain text. And while I understand 4), I think it's a different scenario than mine. I know that some database driver may allow you to directly send the encrypted password. But still...I have another similar scenario in which I have to store a password and then send it (unencrypted)...so I kind of really need a bi-directional encryption. Now..I would try to avoid having an external library + FFI. Any ideas what is the best thing I can do? And how could I solve 1) if I want bidirectional like in my case? Thanks in advance, -- Mariano http://marianopeck.wordpress.com

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Re: FileDoesNotExistException - FileBrowser opening on Mac M1
by Stewart MacLean Dec. 26, 2021

Dec. 26, 2021

Hi All, This is my first post! Sadly it is to report an issue with the FileBrowser on the Mac M1. I am encountering this exception - FileDoesNotExistException. These are the culprits: [image: image.png] I have seen a similar error reported on Windows. Looks like Pharo can't access the attributes of these files? https://github.com/pharo-project/pharo/issues/3571 I'm exploring Pharo with a view to migrating my VisualWorks project of many years, as support for M1 looks like it might be a way off, so not off to a good start! I managed to work around it, by deleting these two files (not from the disk!) in the debugger, before it tried to fetch the attributes. Interestingly, when in the debugger it showed N/A and 0 for the attributes, as these are system files I'm guessing. Thanks, Stewart ==================================================================== Pharo 9.0.0 Build information: Pharo-9.0.0+build.1573.sha.0e09d756fc99383cbb498565200d9e5e9841ce11 (64 Bit) Mac Mini M1 (2020) Monterey 12.0.1 File class>>signalError:for: File class>>primFileAttribute:number: File class>>fileAttribute:number: MacStore(DiskStore)>>sizeOf: FileSystem>>sizeOf: FileReference>>size FileReference(AbstractFileReference)>>humanReadableSize FileListGridNode>>fileSize [:node :cont | node perform: self rowMorphGetSelector] in MorphTreeColumn>>rowMorphGetterBlock in Block: [:node :cont | node perform: self rowMorphGetSelec...etc... MorphTreeColumn>>rowMorphFor: [:col | | v | v := col rowMorphFor: complexContents. controls add: v. col -> v] in MorphTreeNodeMorph>>buildRowMorph in Block: [:col | | v |... OrderedCollection>>collect: MorphTreeNodeMorph>>buildRowMorph MorphTreeNodeMorph>>initRow MorphTreeNodeMorph>>initWithContents:prior:forList:indentLevel: [:item :idx | priorMorph := self indentingItemClass new initWithContents: item prior: priorMorph forList: self indentLevel: newIndent. firstAddition ifNil: [firstAddition := priorMorph]. morphList add: priorMorph. "Was this row expanded ? if true -> expand it again " ((item hasEquivalentIn: expandedItems) or: [priorMorph isExpanded]) ifTrue: [priorMorph isExpanded: true. priorMorph addChildrenForList: self addingTo: morphList withExpandedItems: expandedItems]] in MorphTreeMorph>>addMorphsTo:from:withExpandedItems:atLevel: in Block: [:item :idx | ... Array(SequenceableCollection)>>withIndexDo: Array(Collection)>>doWithIndex: MorphTreeMorph>>addMorphsTo:from:withExpandedItems:atLevel: MorphTreeMorph>>addSubmorphsFromNodeList:previouslyExpanded: MorphTreeMorph>>addSubmorphsFromNodeList MorphTreeMorph>>buildContents FileListGrid>>treeMorph FileList>>morphicGrid FileList>>grid FileList>>updateFileList FileList>>reference: FileList>>directory: FileList>>initialize FileList class(Behavior)>>new On Thu, Dec 23, 2021 at 4:23 PM Stewart MacLean <stewart(a)xtra.co.nz> wrote: > Hi All, > > This is my first post! Sadly it is to enquire about an issue with the > FileBrowser on the Mac M1. > > I am encountering this exception - FileDoesNotExistException. > > I appears to be opening on just two files: > > [image: image.png] > > I have seen a similar error reported on Windows. Looks like Pharo can't > access the attributes of these files? > https://github.com/pharo-project/pharo/issues/3571 > > I'm exploring Pharo with a view to migrating my VisualWorks project of > many years, as support for M1 looks like it might be a way off, so not a > good start! > > Any help appreciated. > > Thanks, > > Stewart > > ==================================================================== > Pharo 9.0.0 > Build information: > Pharo-9.0.0+build.1573.sha.0e09d756fc99383cbb498565200d9e5e9841ce11 (64 Bit) > > Mac Mini M1 (2020) > Monterey 12.0.1 > > File class>>signalError:for: > File class>>primFileAttribute:number: > File class>>fileAttribute:number: > MacStore(DiskStore)>>sizeOf: > FileSystem>>sizeOf: > FileReference>>size > FileReference(AbstractFileReference)>>humanReadableSize > FileListGridNode>>fileSize > [:node :cont | node perform: self rowMorphGetSelector] in > MorphTreeColumn>>rowMorphGetterBlock in Block: [:node :cont | node perform: > self rowMorphGetSelec...etc... > MorphTreeColumn>>rowMorphFor: > [:col | | v | > v := col rowMorphFor: complexContents. > controls add: v. > col -> v] in MorphTreeNodeMorph>>buildRowMorph in Block: [:col | | v |... > OrderedCollection>>collect: > MorphTreeNodeMorph>>buildRowMorph > MorphTreeNodeMorph>>initRow > MorphTreeNodeMorph>>initWithContents:prior:forList:indentLevel: > [:item :idx | > priorMorph := self indentingItemClass new > initWithContents: item > prior: priorMorph > forList: self > indentLevel: newIndent. > firstAddition > ifNil: [firstAddition := priorMorph]. > morphList add: priorMorph. > "Was this row expanded ? if true -> expand it > again " > ((item hasEquivalentIn: expandedItems) > or: [priorMorph isExpanded]) > ifTrue: [priorMorph isExpanded: true. > priorMorph > addChildrenForList: self > addingTo: morphList > withExpandedItems: expandedItems]] in > MorphTreeMorph>>addMorphsTo:from:withExpandedItems:atLevel: in Block: > [:item :idx | ... > Array(SequenceableCollection)>>withIndexDo: > Array(Collection)>>doWithIndex: > MorphTreeMorph>>addMorphsTo:from:withExpandedItems:atLevel: > MorphTreeMorph>>addSubmorphsFromNodeList:previouslyExpanded: > MorphTreeMorph>>addSubmorphsFromNodeList > MorphTreeMorph>>buildContents > FileListGrid>>treeMorph > FileList>>morphicGrid > FileList>>grid > FileList>>updateFileList > FileList>>reference: > FileList>>directory: > FileList>>initialize > FileList class(Behavior)>>new > > >

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CLAP - how to get instance of command without executing it
by bajger＠gmail.com Dec. 25, 2021

Dec. 25, 2021

Hi Pharoers! I have following problem in CLAP and would be glad to get your guidance: I have following method on command class (sub-class of ClapApplication):\ `PhLImageKillCliCommand>>osShellCmdString` `(arguments at: #all) value ` ` ifTrue: [ ^ (self killImageCmdStringFrom: nil) ]. ` `^ self killImageCmdStringFrom: self imageName` And I want to implement unit test, that would test expected output of this method. As you can see, implementation is dependent on arguments attribute #all. And here is a problem in unit test: `testOsShellCmdString`\ `| killCliCommand aMatch| aMatch := (context arguments: #('launcher' 'image' 'kill' '--all')) match. killCliCommand := PhLImageKillCliCommand new. killCliCommand setArguments: aMatch.` `self assert: killCliCommand osShellCmdString equals: ''.` This doesn't work, since `arguments at: #all` gives NotYetImplemented exception. So I don't know, how to "wire" toghether instance of command (without executing it) and needed arguments (a match). Any advice on this? ![ObrÃ¡zek](https://media.discordapp.net/attachments/819245127310114886/922498381358723123/unknown.png)

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pharo9 tools moldability
by Danil Osipchuk Dec. 20, 2021

Dec. 20, 2021

Dear all, Being a long time smalltalk user (meaning I'm crafting tools for my own usage for domains I'm working with) I always relied upon the environment itself to interact with models to spare time creating user interfaces. Besides plain inspectors I used metafacilities where possible -- seaside, then omnibrowser and lately glamour toolkit in pharo8. Now it seems the glamourous core is not part of pharo9 anymore. Meanwhile pharo9 looks increasingly neat and I would like to make a transition but having tools in pharo8 holds me back. I would be grateful for any pointers to help me to get started with the moldable inspectors pharo9 - papers, talks, online discussions, etc. I can likely figure it out on my own, but having an overall understanding of the approach concept would save an effort and shorten the trial and error phase. (maybe I'm overcomplicating it and just having browsed around inspector code pragmas is enough to get started) regards, Danil

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This week (50/2021) on the Pharo Issue Tracker
by Marcus Denker Dec. 17, 2021

Dec. 17, 2021

We merged 15 PRs and closed 9 Issue Tracker entries this week: Modularity ========== - Extract freetype to its own baseline (2nd pass) #10641 https://github.com/pharo-project/pharo/pull/10641 - Register bootstrapped projects #10653 https://github.com/pharo-project/pharo/pull/10653 - Split baseline of threadedffi #10637 https://github.com/pharo-project/pharo/pull/10637 - Make Athens not coupled with FT2 #10646 https://github.com/pharo-project/pharo/pull/10646 Refactoring =========== - Migrating RBAbstractVariables and RBMoveMethod #10626 https://github.com/pharo-project/pharo/pull/10626 Fixes ===== - Fix metacello lock #10633 https://github.com/pharo-project/pharo/pulse - 10294-undefinedIdentifier-is-missing-in-SHRBTextStyler #10648 https://github.com/pharo-project/pharo/pull/10648 - fix a couple of regressions #10662 https://github.com/pharo-project/pharo/pull/10662 - 10651-Resuming-a-exception-that-has-been-signalled-twice-does-not-return-correctly #10652 https://github.com/pharo-project/pharo/pull/10652 Cleanup ======= - Cleanup-DuplcatedMethods-12-13 #10654 https://github.com/pharo-project/pharo/pull/10654 - Cleanup-Spec-Deprecated #10624 https://github.com/pharo-project/pharo/pull/10624 - Unused method in FFI #10660 https://github.com/pharo-project/pharo/pull/10660 - Cleanup: STONWriter categorization #10661 https://github.com/pharo-project/pharo/pull/10661 - Categorize-More-Uncategorized #10649 https://github.com/pharo-project/pharo/pull/10649 - Fixing selector type: RBAddMethodChange>>#class:source:contoller: #10643 https://github.com/pharo-project/pharo/pull/10643

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one year contract
by stephane ducasse Dec. 14, 2021

Dec. 14, 2021

Hello this is a one year contract with remote working possibility in Pharo of course. We will produce an english version. Please contact Nicolas Becu. Nicolas Becu <nicolas.becu(a)cnrs.fr> _____________ Nicolas Becu Chercheur CNRS Littoral Environnement et SociÃ©tÃ©s (UMR LIENSs) TÃ©l : 05 16 49 67 94 S

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Zinc redirect?
by stephane ducasse Dec. 13, 2021

Dec. 13, 2021

FYI running catching my train. from https://github.com/ronsaldo/form-scene-graph/issues/5#issuecomment-990353154 This seems to be a Zinc error while following a redirect. The following snippet can be used for replicating the issue: ZnClient new accept: 'application/octet-stream'; "Required by GitHub" url: 'https://api.github.com/repos/ronsaldo/abstract-gpu/releases/assets/49144132'; followRedirects: true; downloadTo: 'agpu.tar.gz <https://api.github.com/repos/ronsaldo/abstract-gpu/releases/assets/49144132';%20followRedirects:%20true;%20downloadTo:%20'agpu.tar.gz>'

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This week (49/2021) on the Pharo Issue Tracker
by Marcus Denker Dec. 10, 2021

Dec. 10, 2021

We merged 29 PRs and closed 43 issue tracker entries. With Pharo10 in freeze, we focus on fixes and simples cleanups. Fixes ===== - Fixes 10610 - CairoFontExtents is missing a field #10611 https://github.com/pharo-project/pharo/pull/10611 - Fix 10565 - Extract freetype to its own baseline #10566 https://github.com/pharo-project/pharo/pull/10566 - 10536 rubric embedded morphs sometimes misplaced #10558 https://github.com/pharo-project/pharo/pull/10558 - Moving the buggy must be boolean magic support outside of the image #10567 https://github.com/pharo-project/pharo/pull/10567 - Fix for Issue #10269 Replaced RBExtractToTemporaryRefactoring with RBExtractToTemporaryTraâ¦ #10388 https://github.com/pharo-project/pharo/pull/10388 - Fix stability of SUnitTest's related to the process monitoring #10514 https://github.com/pharo-project/pharo/pull/10514 Tests ===== - Made tests for embedded morphs skip as they procuce CI errors. #10628 https://github.com/pharo-project/pharo/pull/10628 Cleanups ======== - 17 PRs "Cleanup newlines and blanks" - Beacon "instance" class variable not capitalized #10614 https://github.com/pharo-project/pharo/pull/10614 - Some cleanups in SUnit-Core #10616 https://github.com/pharo-project/pharo/pull/10616 - Fixing the category of QuotedPrintableMimeConverter>>#newline #10617 https://github.com/pharo-project/pharo/pull/10617

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This week (48/2021) on the Pharo Issue Tracker
by Marcus Denker Dec. 7, 2021

Dec. 7, 2021

For a complete list, see https://github.com/pharo-project/pharo/pulse Fixes ===== - Smooth drag and drop2 #10043 https://github.com/pharo-project/pharo/pull/10043 - Fix so that Rename Method refactoring does not start with a disabled text input #10390 https://github.com/pharo-project/pharo/pull/10390 - Process Changes Meta Pull Request #10429 https://github.com/pharo-project/pharo/pull/10429 - fixes #10516: doing a ffi calll with ByteArray does not pins the object in memory #10518 https://github.com/pharo-project/pharo/pull/10518 - Progress bar interruptible - not interuptable/interruptable #10510 https://github.com/pharo-project/pharo/pull/10510 - Add missing return #10564 https://github.com/pharo-project/pharo/pull/10564 Tests/CI ========= - 10538-run-correct-vm #10541 https://github.com/pharo-project/pharo/pull/10541 - fix-testTearDownMethodInSUnitTestsNeedsToBeInRunningProtocol #10517 https://github.com/pharo-project/pharo/pull/10517 Cleanups ======== - 17 PRs Cleanup newlines and blanks - [cleanup] fix comment for drag and drop setting #10537 https://github.com/pharo-project/pharo/pull/10537 - fixes 10525 - extract Keymapping packages to its own baseline #10526 https://github.com/pharo-project/pharo/pull/10526 - Keymapping-Pragmas package needs to be in UI group #10560 https://github.com/pharo-project/pharo/pull/10560 - fixes 10523 - move ProcessLocalSlot to VariablesLibrary #10524 https://github.com/pharo-project/pharo/pull/10524 - Fix different writing style of "Breakpoints" in Debug menu #10508 https://github.com/pharo-project/pharo/pull/10508 - Cleanup: Fix three more "utilities" cases in Metacello #10506 https://github.com/pharo-project/pharo/pull/10506

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