September 2022 - 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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Inovation Technology Award Submission: Polyphemus
by pmissech Dec. 27, 2022

Dec. 27, 2022

Hello, Although i will not be able to attend ESUG'22, a friend agreed to present one of our projects to the innovation award. **Polyphemus** is aÂ VM related, but public aims at any kind of developers. Particularly, the video submission talks about how to look at an image and how to **recover** dead images. Feel free to contact me if you have any questions ! Enjoy (and vote for Polyphemus!). 5 minutes video, Innovation Technology Award submission: https://youtu.be/zf3cCtNW830 Repository: github.com/hogoww/Polyphemus/ Additionnal information on image recovery: https://github.com/hogoww/Polyphemus/blob/main/Documentation/ResurrectingDe… Cheers !

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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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This week (39/2022) on the Pharo Issue Tracker
by Marcus Denker Sept. 30, 2022

Sept. 30, 2022

This week (39/2022) on the Pharo Issue Tracker This week we merged 13 PRs: Fixes ===== Fixing ProfilerUI issues #11732 https://github.com/pharo-project/pharo/pull/11732 Prevent BlockClosure>>benchFor: to loop infinitely #11698 https://github.com/pharo-project/pharo/pull/11698 Integrate Roassal3 v0.9.9j #11728 https://github.com/pharo-project/pharo/pull/11728 Make title bar layout dependent on new settings option and OS #11719 https://github.com/pharo-project/pharo/pull/11719 11720-Improve-ReUtilityMethodsRule #11722 https://github.com/pharo-project/pharo/pull/11722 Upgrading the version of libgit2-bindings. #1616 https://github.com/pharo-vcs/iceberg/pull/1616 <https://github.com/pharo-vcs/iceberg/pull/1616> Speed ===== 11725-Startup-Slow-in-OSX-previous-to-Monterrey #11726 https://github.com/pharo-project/pharo/pull/11726 Faster Array>>asX and Array>>as: #11716 https://github.com/pharo-project/pharo/pull/11716 Features ======== Add Point>>#isInRectangle #11721 https://github.com/pharo-project/pharo/pull/11721 allow to specify accept callback on an option list #1315 https://github.com/pharo-spec/Spec/pull/1315 Cleanup ======= - Moving Deferred messages to instance side #11714 https://github.com/pharo-project/pharo/pull/11714 - 11631-Clarify-if-TViewModelMock3-is-in-correct-package #11690 https://github.com/pharo-project/pharo/pull/11690 Pharo10 ======= Pharo10: Bug fix + code cleanup for issue #11705: Error: Instances of RBProtocolEnvironment are not indexable #11706 https://github.com/pharo-project/pharo/pull/11706

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This week (38/2022) on the Pharo Issue Tracker
by Marcus Denker Sept. 23, 2022

Sept. 23, 2022

We merged 13 PRs and closed 12 issues this week: There are many more PRs ready in need of a rieview: https://github.com/pharo-project/pharo/pulls Fixes ===== - Pharo11: Bug fix + code cleanup for issue #11705: Error: Instances of RBProtocolEnvironment are not indexable #11708 https://github.com/pharo-project/pharo/pull/11708 - Fix for segmentation fault issue on new Pharo 11 image #11715 https://github.com/pharo-project/pharo/pull/11715 - Integrate Roassal3 v0.9.9i2 #11711 https://github.com/pharo-project/pharo/pull/11711 https://github.com/pharo-project/pharo/pull/11704 - clean String reading from FFI to return bytes to allow decoding with any decoder. #11668 https://github.com/pharo-project/pharo/pull/11668 - DrTest see extension classes #11689 https://github.com/pharo-project/pharo/pull/11689 - fix testIconProvider #1314 https://github.com/pharo-spec/Spec/pull/1314 - Adds a setting to change the default playground cache directory. #419 https://github.com/pharo-spec/NewTools/pull/419 - [Debugger] Improving skipUpTo stability + reintegration in the advanced debugging tools #415 https://github.com/pharo-spec/NewTools/pull/415 Cleanups ======== - 11613-Review-RBLiteralNode-classvalue #11701 https://github.com/pharo-project/pharo/pull/11701 - 4995-Epicea-fix-EpApplyPreviewerTesttestTraitModification #11691 https://github.com/pharo-project/pharo/pull/11691 - deprecate taskbarIcon and systemIcon #11695 https://github.com/pharo-project/pharo/pull/11695 Websites ======== - Fixed SSL problems with https://consortium.pharo.org

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Weekly "what happend on the issue tracker" archive
by Marcus Denker Sept. 16, 2022

Sept. 16, 2022

Hi, I am now archiving the weekly mails here: https://github.com/pharo-project/pharo-changelogs/tree/master/weekly/2022 (I will try to add the older ones slowly) We try to update the Release Changelog from the weekly all couple of weeks (just recording the important changes). This is now taking into account the weekly till 29/2022: https://github.com/pharo-project/pharo-changelogs/blob/master/Pharo110Chang…

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This week (37/2022) on the Pharo Issue Tracker
by Marcus Denker Sept. 16, 2022

Sept. 16, 2022

Even though the CI setup could not check Pull Requests for some days (fixed), we merged 18 PRs this week: Features ======== - Creating a user interface for Time Profiler and Andreas Profiler #11673 https://github.com/pharo-project/pharo/pull/11673 - FileBrowser loadable again: P10+ updates, multiple fixes #409 https://github.com/pharo-spec/NewTools/pull/409 Fixes ===== - Improve FileReference>>= #11663 https://github.com/pharo-project/pharo/pull/11663 - Enabling formating of uncompiled method #11672 https://github.com/pharo-project/pharo/pull/11672 - Fix case insensitive auto-completion setting #11564 https://github.com/pharo-project/pharo/pull/11564 - SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR=0 on Linux #11664 https://github.com/pharo-project/pharo/pull/11664 - Reduce false positives of some general rules #11682 https://github.com/pharo-project/pharo/pull/11682 - Git: Make remote comparison work better between remotes with different urls https://github.com/pharo-vcs/iceberg/pulse - 97-Inspector-Meta-tab-Browse-on-class-opens-UndefinedObject #416 https://github.com/pharo-spec/NewTools/pull/416 Cleanup ======= - unify-category-Context #11686 https://github.com/pharo-project/pharo/pull/11686 - Corrected spelling per Issue #11674 #11675 https://github.com/pharo-project/pharo/pull/11675 - Cleaning CharacterSet class >> #allCharacters #11662 https://github.com/pharo-project/pharo/pull/11662 - Deprecated method Character class >> #allCharacters and replaced its references #11660 https://github.com/pharo-project/pharo/pull/11660 - Clean ast core #11681 https://github.com/pharo-project/pharo/pull/11681 Comments ======== - Expand Heap, Interval, LinkedList class comments #11667 https://github.com/pharo-project/pharo/pull/11667 - Adds executable comments to False and True classes #11666 https://github.com/pharo-project/pharo/pull/11666 Pharo 10 ======= - Revert "Creates Graphical UI for AndreasProfiler and TimeProfiler" #11676 https://github.com/pharo-project/pharo/pull/11676

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A/B Testing the latest VM on the Pharo repository PRs
by Guillermo Polito Sept. 14, 2022

Sept. 14, 2022

Hi all, TL;DR; I propose we start testing the latest VMs on PRs to the Pharo repository in a "semi-randomâ way. The idea is to earn some confidence while having a small impact on all of you. ==== We need to slowly start pushing the latest VM version, right now hosted in the pharoX branch of the VM repository. This branch so far has all our latest work on the VM for at least one year. Some highlights Interpreter variable auto-localization (Feat/automatic localizationÂ pharo-vm#371 <https://github.com/pharo-project/pharo-vm/pull/371>) Slang cleanups and improvements (Clean slang warningsÂ pharo-vm#413 <https://github.com/pharo-project/pharo-vm/pull/413>, Fix while statement printingÂ pharo-vm#265 <https://github.com/pharo-project/pharo-vm/pull/265>, CastÂ pharo-vm#230 <https://github.com/pharo-project/pharo-vm/pull/230>, Clean slang warningsÂ pharo-vm#413 <https://github.com/pharo-project/pharo-vm/pull/413>, Switch translation to CAST, and testsÂ pharo-vm#311 <https://github.com/pharo-project/pharo-vm/pull/311>, Add several CAST translations and testsÂ pharo-vm#307 <https://github.com/pharo-project/pharo-vm/pull/307>, Fix type inference testsÂ pharo-vm#291 <https://github.com/pharo-project/pharo-vm/pull/291>) SIMD support in the JIT (Speed up object initialization in AArch64 using SIMD instructionsÂ pharo-vm#421 <https://github.com/pharo-project/pharo-vm/pull/421>, SIMD bytecodesÂ pharo-vm#444 <https://github.com/pharo-project/pharo-vm/pull/444>) Initial work on the perm space (Composed image formatÂ pharo-vm#377 <https://github.com/pharo-project/pharo-vm/pull/377>, Composed image format: C translationÂ pharo-vm#388 <https://github.com/pharo-project/pharo-vm/pull/388>, Refactoring of Snapshot and Loading of ImagesÂ pharo-vm#372 <https://github.com/pharo-project/pharo-vm/pull/372>, Perm space on imageÂ pharo-vm#416 <https://github.com/pharo-project/pharo-vm/pull/416>, New & old remembered setsÂ pharo-vm#418 <https://github.com/pharo-project/pharo-vm/pull/418>) Many many bugfixes â¦ To not disrupt anybodyâs work, I propose to make some kind of AB testing on the CI, only impacting PRs to the Pharo repository. odd builds (1,3,5,â¦) use the latest VM even builds (2,4,6,â¦) use the stable VM This will make sure that: the latest VM will be tested in a complex scenario (load code, run testsâ¦) people that have a problem can re-run their builds to get a stable run Iâve made the following PR that follows this idea https://github.com/pharo-project/pharo/pull/11678 G

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This week (36/2022) on the Pharo Issue Tracker
by Marcus Denker Sept. 12, 2022

Sept. 12, 2022

We merged 24 PRs last week. Features ======== [improvement] add microsecond to API #11493 https://github.com/pharo-project/pharo/pull/11493 - adding entries in the debug world menu to enable / disable all breakpoints in the image #11614 https://github.com/pharo-project/pharo/pull/11614 - Adding an API in OCBytecodeToASTCache, RBMethodNode and RBBlockNode to map AST nodes to a pc range. #11651 https://github.com/pharo-project/pharo/pull/11651 Speed ===== - 11597-RPackagetoTagName-possibly-creates-an-extra-symbol #11604 https://github.com/pharo-project/pharo/pull/11604 Git/Iceberg =========== - Treat trait class side definitions like class class side definitions too #1609 https://github.com/pharo-vcs/iceberg/pull/1609 - Fix/1426: ZnInvalidUTF8 when reading a commit message #1611 https://github.com/pharo-vcs/iceberg/pull/1611 - When the remote server cuts the connection or there is an issue in thâ¦ #1613 https://github.com/pharo-vcs/iceberg/pull/1613 - Only compute critiques when needed #1610 https://github.com/pharo-vcs/iceberg/pull/1610 Fixes ===== - 11635-Compiler-eval-an-expression-with-halt-and-bindings-opens-Emergency-Evaluator #11637 https://github.com/pharo-project/pharo/pull/11637 - Attempt to fix scrolling behavior in RubAbstractTextArea & friends #11583 https://github.com/pharo-project/pharo/pull/11583 - Fix leaking subscriptions in SpRubFindReplaceService #11608 https://github.com/pharo-project/pharo/pull/11608 - Make explicit hostname and port work with bitbucket #11585 https://github.com/pharo-project/pharo/pull/11585 - Fix behavior of sum: on collections of doubles #11600 https://github.com/pharo-project/pharo/pull/11600 - FTTableMorph: Allow expansion/collapse of nodes using arrow keys #11644 https://github.com/pharo-project/pharo/pull/11644 - [Quick review] fix #11265: Underscore in class name breaks text completion #11487 https://github.com/pharo-project/pharo/pull/11487 - FTTableMorph: Pass some keyboard events to the filter field if it is focused #11647 https://github.com/pharo-project/pharo/pull/11647 Cleanup ======= - RubAbstractTextArea: Avoid a superfluous isNotNil in handleEdit: #11645 https://github.com/pharo-project/pharo/pull/11645 - Cleanups necessary in FreeType #11636 https://github.com/pharo-project/pharo/pull/11636 - 11558-leadingChar-is-provided-but-unused #11654 https://github.com/pharo-project/pharo/pull/11654 Comments ========= - Expand class comment for Set #11642 https://github.com/pharo-project/pharo/pull/11642 - Update vm links with the new pharo-vm repo #11652 https://github.com/pharo-project/pharo/pull/11652 - 11612-RBComment-class-comment #11653 https://github.com/pharo-project/pharo/pull/11653 Pharo 10 ======== - backportPharo10-11635-Compiler-eval-an-expression #11638 https://github.com/pharo-project/pharo/pull/11638 Pharo 9 ======== - Use iceberg 2.0.5.1 #11596 https://github.com/pharo-project/pharo/pull/11596

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Equality/Hash Modification and Image Rehashing
by sean＠clipperadams.com Sept. 7, 2022

Sept. 7, 2022

>From Pharo Discord: IIUC when I change the comparison behavior of a class (i.e. reimplement #= and #hash), sets containing those objects start acting oddly e.g. happily storing duplicates of equal objects and failing to find objects they contain. A solution seems to be Set allSubInstances do: #rehash. Is my understanding correct? If so, I find it odd that I've been using and researching Smalltalk for well over a decade and I never remember reading/hearing about this. I wonder if it can be baked into the IDE somehow e.g. via a critic... And stephan responded: > The mailing list posts about that I remember were at the time where the number of object bits used for the hash were increased. --- Following up on his clue, I found [this old post](https://lists.pharo.org/empathy/thread/LKCE5UXYPXPLVOGNZYW64BWHYJY5NM… "this old post"), which seems to confirm my suspicion. This seems like a serious trap for users to fall into (Iâm having flashbacks to my C++ days lol). So, can/should we somehow handle this in the IDE? Something like a refactoring (that has a confirmation window) that gives you the choice to rehash image collections when redefining these methods? In a 1GB image, \`Set allSubInstances do: #rehash\` is almost instantaneous and \`Dictionary allSubInstances do: #rehash\` takes several seconds.

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