Squeak-dev November 2004

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164 participants
373 discussions

veryDeepCopy, ImageSegments, and actionMaps
by Ned Konz 17 Aug '23

17 Aug '23

Any Object can have dependents whether or not it has an instance variable to keep track of them (these are kept in the DependentsFields class variable of Object). The only class that keeps its own dependents is Model. Any Object can have an actionMap. These are supplied by EventManager class by default, and are stored in the ActionMaps class variable of EventManager. The only class that keeps its own action maps is Morph. When we veryDeepCopy an object we also copy the global dependents (see DeepCopier>>fixDependents). However, we don't copy the actionMap in those cases where it's held by the EventManager class. When we file out an object that uses DependentsFields out into an ImageSegment, we also file out the dependents (see ImageSegment>>dependentsSave:) if it's in a project. We do this by adding a project parameter called #GlobalDependentsInProject. However, we don't file out the actionMap in those cases where it's held by the EventManager class. My question is this: should we fix these behaviors (copying and serialization) to include these "global action maps" just like we already include the "global dependents"? Or should we discourage the use of the "global action maps"? -- Ned Konz http://bike-nomad.com GPG key ID: BEEA7EFE

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Trying to build SerialPlugin for IrDA under MPW (MacOS 8.6)
by Hans-Martin Mosner 24 May '12

24 May '12

Hi, I recently got a serial IrDA adapter and wanted to play around with it under Squeak. This adapter has a baudrate switching mechanism which depends on toggling the DTR and RTS lines in the correct sequence. To support this, I wanted to build a new SerialPlugin with an additional primitive. However, the plugin as built with MPW does not seem to be accepted by the VM, which still uses the internal plugin in all cases. I've tried placing the plugin in a 'Plugins' subfolder of the VM's folder, and then directly into the VM folder, without any success. I have considered placing debug outputs in appropriate places in the VM, but building a complete VM with MPW is not easy - I would have to create an MPW makefile for the whole shebang, which is more work than I can invest at the moment. Does any of you Mac aficionados have an idea where the problem could be? I have appended the plugin and corresponding source files in a ZIP file (it's not big) so if you want to try it out you could do it right now :-) BTW, would it make sense to incorporate support for switching serial port parameters of an open port into the standard plugin? Closing and opening a port just to change the baud rate seems a little overkill... Cheers, Hans-Martin

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RE: Progrmaming in Bytecode?
by Swan, Dean 24 Nov '06

24 Nov '06

>> It's not uncommon to find x86 code padded with a lot of NOPs >> that weren't in the original source. > >Cowardly assembler! ;-) > >> [NOPs...] Sometimes they're there to pad the execution pipeline, and >> sometimes it's just because the code generator allocates a whole large >> enough for the largest form of an instruction to simplify the branch >> target calculations. > >We must be talking about M$oft assemblers here. ;^p) Yes. This has been pretty characteristic of MS assemblers as far back as I can remember (i.e. about MASM 2.0 - I remember being quite excited when MASM 4.0 came out - '186 and '286 code!). >The real problem is that the solution in general might require N >iterations for a piece of code with N branches -- if promoting one of them >from short to long causes the next (or, much more problematically, a >preceding) one to become long too. You're such an optimist. O(n) is close to best case for this problem. >This is a weak form of what I suppose one might call an "oscillating >constraints" problem. (Hands up anyone who has ever seen [La]TeX get Hence, stochastic optimization. Even MS uses stochastic optimizers now, even in vb. (didn't want to say that too loud here. ;) ) >The usual cause for "padding" in (capable) assemblers (other than for >prefetch alignment, as you point out) is due to dynamic linking where the >size of call sites isn't known until link time. (On modern systems the Not only prefetch alignment. I have heard, although I don't know the details that sometimes it's desirable to force a dead cycle in the execution pipeline. I can only guess that this would be to influence the scheduling of the execution units for complex instructions, but I consider myself to be only a "casual observer" with respect to this kind of thing. >In Smalltalk you've also got a bigger problem: for very long methods the >range of even unconditional branches might not be enough, at which point >I know this has nothing whatsoever to do with Smalltalk...) Well, to kind of tie this back into something relevant to Squeak - I know a few people have talked about "new" VM instruction sets. It seems that it might help to think about a VM where all instructions are the same size. This could simplify code generation (i.e. compiling methods), and possibly improve performance and *reduce* code size (at least in the case of long methods). The anticipated performance improvement would come from forcing aligned fetches more often and potentially simpler instruction decoding. It's really nice to work with an architecture where all instructions take up one word of memory, take one cyle to execute, and sometimes can cause five or six different useful things to occur during that one cycle. (ok, so I write a lot of DSP code...) The single cycle thing isn't necessarily relevant for Smalltalk, but those "extended" bytecodes are really distasteful to me. -Dean

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[BUG] SM2 Burps after loading Breakpoint support or ColorDevTools
by Thomas A Petersen 05 Dec '05

05 Dec '05

Herman, Goran, et. al, I don't think your Jacaranda script is the problem. I tried the same exercise from a clean 3.7 5566 image and loading SM2 Loader first thing. I get the same crash with Breakpoint Support and ColorDevTools. Checking the change sorter shows that things are installed. There appears to be something going on as SM2 finishes things. Goran, Oh Great Sage of SM.... Can you enlihton us? Thanks much, tap P.S. Here's the debug log. Could this be a side effect of the translation stuff?? ----------------------------------------------------- MessageNotUnderstood: Character>>first 1 December 2003 3:22:52 pm VM: Win32 - Squeak3.5 of '11 April 2003' [latest update: #5180] Image: Squeak3.7alpha [latest update: #5566] Character(Object)>>doesNotUnderstand: #first Receiver: $5 Arguments and temporary variables: aMessage: a Message with selector: #first and arguments: #() Receiver's instance variables: value: 53 SMSqueakMap>>installedVersionOf: Receiver: a SMSqueakMap Arguments and temporary variables: aPackage: SMPackage[Breakpoint Support] Receiver's instance variables: packages: a Dictionary(an UUID ('010894c3-0b8a-47fc-8deb-7c08996bfa71')->SMPackage[OSProcessPlugin] an UUID('017b1882-9376-4bf7-b...etc... accounts: a Dictionary(an UUID ('034ab782-a939-de49-976c-b009701b4406')->SMAccount[Todd Blanchard] an UUID ('035d2bda-c301-6049-b...etc... objects: a Dictionary(an UUID ('007e8c1c-02fa-45fc-97be-7ea4d2f67134')->SMCategory: Package group an UUID ('008c9940-4caf-ac49-a...etc... categories: nil dir: 'sm' transactionCounter: 3011 firstTransactionNumber: 2929 daysBacklog: 182 adminPassword: nil installedPackages: a Dictionary(an UUID ('07469ced-289a-4b6f-bd17-27ec567e681a')->'1.25' an UUID ('1200100f-1a95-...etc... installCounter: nil fileCache: a SMFileCache users: nil --- The full stack --- Character(Object)>>doesNotUnderstand: #first -----------------------------------------------------

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About MAC VM
by stéphane ducasse 13 Sep '05

13 Sep '05

hi john I hope your travel back was good. It was good to have you around at ESUG. I wanted to know if this would be possible that when we double click on an image and that there is already one squeak running, we get another one. Because now we are all copying VM around. Stef

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Re: Yahoo!
by Cg 11 Jun '05

11 Jun '05

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ObjectiveCPlugin progress
by Avi Bryant 25 Dec '04

25 Dec '04

A while ago, Alain Fischer announced his new ObjectiveC plugin, allowing Squeak to use Apple's Cocoa and other ObjectiveC libraries. Todd Blanchard and I have since done some further work on it, and it's at the point now where it can begin be used to build Cocoa UIs from within Squeak. As a quick test, I built a native OS X UI for the system browser, which you can see in this screenshot: http://beta4.com/~avi/browser.jpg The code is on SqueakSource: http://kilana.unibe.ch:8888/ObjectiveCBridge/ObjectiveC-avi.70.mcz You can get a prebuilt plugin (for use with Ian's 3.7 VM) here: http://beta4.com/~avi/ObjectiveCPlugin The browser demo can be run with "CCBrowser test". It requires this nib file: http://beta4.com/~avi/CCBrowser.tgz You need to untar that and place it inside Contents/Resources/English.lproj of your VM application bundle. I'm announcing this partly because I've run out of steam on it for now, and am hoping someone else will take it the next step of building UIs for the various Squeak tools (browsers, debuggers, workspaces, inspectors, etc) in Cocoa. A custom NSMorphicView would also be cool, although might be pretty tricky. Anyway, if someone does try to take this on, I'll be more than happy to answer any questions they have about the underlying bridge code. Cheers, Avi

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[ANN] alpha release of 64-bit support available
by Ian Piumarta 15 Dec '04

15 Dec '04

Folks, Just as the title says. The "release notes" are somewhat long and involved, so grab them online at: http://www-sor.inria.fr/~piumarta/squeak64/ Note that it's still very much in the "alpha" stage (so comments, suggestions, etc., are welcome concerning any part of it) and that it is not intended for anyone who isn't already comfortable with building and troubleshooting the VM (problem reports from VM hackers also very welcome, of course). Please send any e-mail to both Dan and myself, direct. Thanks. Enjoy! Ian

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[ANN] eCompletion - code completion inspired by eclipse
by Ruben Bakker 15 Dec '04

15 Dec '04

The package is available on the SqueakMap with the name eCompletion. More information can be found on this page: http://homepage.mac.com/monique_bakker/squeak/eCompletion.html. Have fun... Ruben

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[BUG] Not displaying full URL in HTTPClient error message
by humasect＠shaw.ca 14 Dec '04

14 Dec '04

Offending method: HTTClient class>>httpGetDocument: Test with File List -> any remote connection that won't resolve (SqueakDotOrg as example). Error dialog displays only characters before the ':' it seems. The error report: 30 November 2004 1:26:10 am VM: Win32 - a SmalltalkImage Image: Squeak3.9alpha [latest update: #6474] SecurityManager state: Restricted: false FileAccess: true SocketAccess: true Working Dir C:\Squeak Trusted Dir C:\Squeak\Humasect Untrusted Dir C:\My Squeak\Humasect HTTPClient class(Object)>>error: Receiver: HTTPClient Arguments and temporary variables: aString: 'Listing failed: Could not resolve the server named: ftp' Receiver's instance variables: superclass: Object methodDict: a MethodDictionary() format: 2 instanceVariables: nil organization: ('as yet unclassified') subclasses: nil name: #HTTPClient classPool: a Dictionary(#BrowserSupportsAPI->nil #RunningInBrowser->false ) sharedPools: nil environment: a SystemDictionary(lots of globals) category: nil HTTPClient class>>getDirectoryListing: Receiver: HTTPClient Arguments and temporary variables: dirListURL: 'ftp://www.squeak.org/Squeaklets/' answer: 'Could not resolve the server named: ftp' ftpEntries: nil ftpEntry: nil entry: nil Receiver's instance variables: superclass: Object methodDict: a MethodDictionary() format: 2 instanceVariables: nil organization: ('as yet unclassified') subclasses: nil name: #HTTPClient classPool: a Dictionary(#BrowserSupportsAPI->nil #RunningInBrowser->false ) sharedPools: nil environment: a SystemDictionary(lots of globals) category: nil HTTPServerDirectory>>entries Receiver: HTTPServerDirectory<www.squeak.org> Arguments and temporary variables: Receiver's instance variables: server: 'www.squeak.org' directory: '/Squeaklets' type: #ftp user: nil passwordHolder: nil group: nil moniker: nil altURL: nil urlObject: nil client: nil loaderUrl: nil eToyUserListUrl: nil eToyUserList: nil keepAlive: false acceptsUploads: true [] in FileList2>>listForPatterns: {[:pat | newList addAll: (directory entries select: [:entry | fileSelec...]} Arguments and temporary variables: anArray: an OrderedCollection('*') sizePad: nil newList: a Set() pat: '*' entry: nil mx: nil e: nil --- The full stack --- HTTPClient class(Object)>>error: HTTPClient class>>getDirectoryListing: HTTPServerDirectory>>entries [] in FileList2>>listForPatterns: {[:pat | newList addAll: (directory entries select: [:entry | fileSelec...]} - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - OrderedCollection>>do: FileList2>>listForPatterns: [] in FileList2(FileList)>>updateFileList {[(pattern findTokens: (String with: Character cr with: Character l...]} BlockContext>>ensure: CursorWithMask(Cursor)>>showWhile: FileList2(FileList)>>updateFileList FileList2(FileList)>>pattern: FileList2>>directory: FileList2>>setSelectedDirectoryTo: SimpleHierarchicalListMorph>>setSelectedMorph: SimpleHierarchicalListMorph>>mouseUp: SimpleHierarchicalListMorph(Morph)>>handleMouseUp: MouseButtonEvent>>sentTo: SimpleHierarchicalListMorph(Morph)>>handleEvent: SimpleHierarchicalListMorph(Morph)>>handleFocusEvent: [] in HandMorph>>sendFocusEvent:to:clear: {[ActiveHand _ self. ActiveEvent _ anEvent. result _ focusHolder handle...]} [] in PasteUpMorph>>becomeActiveDuring: {[aBlock value]} BlockContext>>on:do: PasteUpMorph>>becomeActiveDuring: HandMorph>>sendFocusEvent:to:clear: HandMorph>>sendEvent:focus:clear: HandMorph>>sendMouseEvent: HandMorph>>handleEvent: HandMorph>>processEvents [] in WorldState>>doOneCycleNowFor: {[:h | ActiveHand _ h. h processEvents. capturingGesture _ capturingGestur...]} Array(SequenceableCollection)>>do: WorldState>>handsDo: WorldState>>doOneCycleNowFor: WorldState>>doOneCycleFor: PasteUpMorph>>doOneCycle [] in Project class>>spawnNewProcess {[[World doOneCycle. Processor yield. false] whileFalse. nil]} [] in BlockContext>>newProcess {[self value. Processor terminateActive]}

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