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

New Cog VMs available
by Eliot Miranda May 11, 2015

May 11, 2015

at http://www.mirandabanda.org/files/Cog/VM/VM.r3332/. CogVM binaries as per VMMaker.oscog-eem.1298/r3332 NewspeakVM: Thread lookup rule through from bytecodes to internalFindNewMethod:. Fix genInnerPrimitiveMirrorNewWithArg:. Class's hash was being accessed twice, reusing variable holding jump instruction. Fix primitiveClass and genPrimitiveClass for mirror case (arg count = 1). Also fix Newspeak primitive table to allow nargs > 0 for genPrimitiveClass. General: Fix a regression in externalInstVar:ofContext:. The head frame pointers must be written back if we're going to map a machince code pc to a bytecode pc in case of code reclamation. Add asserts to the stack page enumerators to check that the head frame pointers have been written back. Fix changeClass: for forwwarded receivers. Use macros for the oop comparisons, avoiding cCoerce:, to get faster simulation and avoid the inliner not inlining in conditionals. Spur: Change computeRefCountToShrinkRT to - compute the ref counts and population in a single pass over the RT - determine the ref count for tenuring based on half the population of remembered objects, /not/ half the size of the RT. -- best, Eliot

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Pending OS-X Cocoa Squeak VM build
by John McIntosh May 11, 2015

May 11, 2015

Morning. I've taken some time to integrate various Pharo and Pyonkee changes into the Squeak OS-X and iOS cocoa source tree, along with converting the code base to ARC and modern Obj-C. Earlier today I ran a Squeak4.5-13680 32bit image on a 64bit client 3488 run, 3421 passes, 23 expected failures, 43 failures, 0 errors, 1 unexpected passes However I need some folks to step forward and validate the results, document what might be broken, look for behaviour anomalies, and refine exactly what plugins are needed in the base system. I also need someone to try this on a 32bit host with 32bit image, and with a current 64bit image (which I don't have) on a 64bit host. Drop me a note and I"ll forward a link to a binary for testing. Shortly I will be integrating these changes into the Cog branch and create an XCode project for building a 64/64 Cog/etc VM. -- =========================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> https://www.linkedin.com/in/smalltalk ===========================================================================

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New Cog VMs available
by Eliot Miranda May 10, 2015

May 10, 2015

... at http://www.mirandabanda.org/files/Cog/VM/VM.r3326. CogVM binaries as per VMMaker.oscog-eem.1297/r3326 NewspeakVM: Thread lookup rule through from bytecodes to internalFindNewMethod:. Fix genInnerPrimitiveMirrorNewWithArg:. Class's hash was being accessed twice, reusing variable holding jump instruction. Fix primitiveClass and genPrimitiveClass for mirror case (arg count = 1). Also fix Newspeak primitive table to allow nargs > 0 for genPrimitiveClass. General: Fix a regression in externalInstVar:ofContext:. The head frame pointers must be written back if we're going to map a machince code pc to a bytecode pc in case of code reclamation. Add asserts to the stack page enumerators to check that the head frame pointers have been written back. Use macros for the oop comparisons, avoiding cCoerce:, to get faster simulation and avoid the inliner not inlining in conditionals. Spur: Change computeRefCountToShrinkRT to - compute the ref counts and population in a single pass over the RT - determine the ref count for tenuring based on half the population of remembered objects, /not/ half the size of the RT. Sista: Remove the storeCheck in inlined pointer at:put: if the value stored is an unannotatable constant. Increased the opcode size heuristic in the SistaCogit. -- best, Eliot

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Error on loading GToolkit configuration
by Nicolai Hess May 10, 2015

May 10, 2015

15470 <https://pharo.fogbugz.com/default.asp?15470> Replace Announcer>>#on:send:to:'s senders in GTSpotter Pharo5.0 Latest update: #50040 Anyone knows why this fails: Gofer new smalltalkhubUser: 'Moose' project: 'GToolkit'; load; configurationOf: 'GTSpotter'; loadVersion:'1.2.4' -> Could not resolve: GT-SpotterExtensions-Core [ GT-SpotterExtensions-Core-AndreiChis.145]

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[Review]: Issue 13159: ListDialogWindow - Grow Width to Fit List
by Sean P. DeNigris May 10, 2015

May 10, 2015

https://pharo.fogbugz.com/default.asp?13159 Right now, it doesn't do a very good job of sizing itself. See the screenshot below of the Metacello Configuration Browsers "Switch Repository" dialog. The width is insufficient for the tool to be resizable without first manually resizing. <http://forum.world.st/file/n4825490/Screenshot_2015-05-09_09.png> Fix in inbox, validated by monkey: SLICE-Issue-13159-ListDialogWindow---Grow-Width-to-Fit-List-SeanDeNigris.1 - Keep extent relatively consistent with the contained list morph ----- Cheers, Sean -- View this message in context: http://forum.world.st/Review-Issue-13159-ListDialogWindow-Grow-Width-to-Fit… Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

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Re: [Pharo-dev] [squeak-dev] Re: A fast Transcript
by Levente Uzonyi May 10, 2015

May 10, 2015

On Sun, 10 May 2015, karl ramberg wrote: > If you disable preference 'Force Transcrip updates to screen' you will get much higher performance.Redrawing is then minimal > Time millisecondsToRun: [ 1000 timesRepeat: Â [ Transcript show: 'x'] ] 694 Right, but then it won't update the contents of the morph, while your code is running in the UI process. So you have to fork your process, just like in Pharo. Levente > > Karl > > On Sun, May 10, 2015 at 4:01 AM, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > Hi Tudor, > > On Sat, May 9, 2015 at 2:23 PM, Tudor Girba <tudor(a)tudorgirba.com> wrote: > Hi Eliot, > Just a question: Could you describe the situations when you need to have the Transcript editable? > > I am not trying to provoke you, > > > my reputation preceeds me ;-) > > Â > but to understand use cases. While working on GT I found that it is often possible to support the same use cases with multiple UI solutions. And sometimes considering alternatives leads to > interesting results. > > > While I have an over-full transcript that holds progress over time, notes etc, these could be moved to a workspace.Â What I really use editablity in the transcript for is to cut-down output.Â For > example, if I'm analysing some jitted code it will get printed out in the transcript (without a lot of retooling) and it is very convenient to cut down the often large amount of output to focus on what > I'm interested in.Â Or I might be trying to fix a bug with repeated runs and again collect relevant data (print outs of objects or stack frames from the simulator) for use as reference points in later > runs.Â Or I might collect some warnings from the Slang SMalltalk-to-C translator. > > In short, there's a lot of different kinds of data going to the transcript and it can be useful to edit it in place instead of having to copy it elsewhere. > > > Cheers, > Doru > > > > On Sat, May 9, 2015 at 9:32 PM, Eliot Miranda <eliot.miranda(a)gmail.com> wrote: > Hi Juan, > Â Â I see that your new transcript is indeed much faster but is also not editable.Â I wonder if it would be possible to have the best of both worlds and arrange that, when active, the > transcript is editable.Â For example, selecting the TranscriptWIndow could put it into a mode where the transcript's state was imported into a more conventional editable text morph, and then > when the window was exited, reverted to the standard fast output mode.Â As you can infer I like having an editable transcript.Â I can do without it, because Squeak's slow transcript is > indeed a PITA, but I'm not sure that speed need preclude editability. > > On Sat, May 9, 2015 at 10:17 AM, J. Vuletich (mail lists) <juanlists(a)jvuletich.org> wrote: > Hi Folks, > > (below) > > Quoting Ben Coman <btc(a)openinworld.com>: > > On Sat, May 9, 2015 at 10:35 PM, Eliot Miranda <eliot.miranda(a)gmail.com> > wrote: > > > > On Sat, May 9, 2015 at 7:09 AM, Ben Coman <btc(a)openinworld.com> wrote: > > >From my limited experience bug hunting, calling #changed: from a thread > other than the UI thread is a source of evil.Â There are too many > assumptions throughout the system that the UI is single threaded.Â Can > anyone advise me that is not a proper belief? > > Then that implies that a Transcript implementation where #nextPut: direct > calls #changed: > is not appropriate for use with multi-threaded applications.Â In Pharo, > #changed: is only called from #stepGlobal, which is called from > doOneCycle:.Â (This came about as a last minute bug fix before Pharo 3 > release and maybe could use some cleanup. > > Separating the UI from Transcript into its own viewer might be a good > idea, but actually it would not solve Stef's case since his code would > still be running in the UI thread -- unless the viewer ran in another > thread, which would have its own complexities. > > I think the point about efficiency is significant. The following > example... > Â Â Â Time millisecondsToRun: [ 1000 timesRepeat:Â [ Transcript show: 'x' > ] ] > on Squeak 4.5 --> 12749ms > on Pharo 50029 --> 2ms > > This better performance helped me a lot trying to understand the high > priority timerEventLoop being able to indiscriminately scatter Transcript > tracing through that code.Â I believe its also probably beneficial for > working with externally triggered semaphores and timing sensitive race > conditions. > > So we have two mutually exclusive cases: > * better interactivity, poorer system performance > * faster system performance, worse interactivity > > Which of these is broken depends on your viewpoint. > > > Something that runs fast but is incorrect is still incorrect.Â The fact > that the transcript doesn't output until a world step is possible is a > bug.Â It forces programs that use the transcript to be rewritten in order > to see transcript output. > > > As a point of comparison for correctness, for the following... > > Â Â Transcript clear. > Â Â [Â Â $a asciiValue to: $z asciiValue do: [ :c | > Â [ 1 to: 9 do: [ :i | Transcript show: c asCharacter printString , i > printString , ' ' ] ] forkAt: 40 > ]. > Â Â ] forkAt: 41 > > Squeak 4.5 gives... > $a1 $a2 $a3 $a4 $a5 $a6 $a7 $a8 $a9 $b1 $b2 $b3 $b4 $b5 $b5 $c1 $c2 $c3 $c4 > $c5 $c6 $c7 $c8 $c9 $d1 $d2 $d3 $d4 $d5 $d6 $d7 $d8 $d9 $d9 $e2 $g2 $h2 $h2 > $i2 $k2 $k2 $l2 $n2 $n2 $o2 $o2 $r2 $s2 $t2 $u2 $u2 $v2 $x2 $y2 $z2 $z2 $b7 > $f3 $e3 $e3 $g3 $j3 $h3 $i3 $k3 $k3 $m3 $n3 $p3 $p3 $q3 $o3 $s3 $t3 $t3 $u3 > $v3 $x3 $y3 $z3 $b8 $f4 $e4 $e4 $g4 $h4 $i4 $k4 $l4 $m4 $m4 $n4 $r4 $q4 $o4 > $o4 $s4 $w4 $u4 $u4 $v4 $y4 $y4 $z4 $z4 $f5 $j5 $j5 $g5 $i5 $k5 $l5 $l5 $m5 > $m5 $n5 $q5 $o5 $s5 $s5 $t5 $u5 $u5 $x5 $y5 $z5 $f6 $f6 $h6 $h6 $g6 $g6 $k6 > $p6 $m6 $r6 $r6 $n6 $o6 $s6 $s6 $w6 $u6 $x6 $x6 $e7 $f7 $j7 $h7 $h7 $i7 $l7 > $l7 $k7 $m7 $m7 $q7 $n7 $n7 $o7 $t7 $w7 $w7 $u7 $v7 $x7 $z7 $z7 $e8 $e8 $h8 > $g8 $i8 $i8 $l8 $k8 $k8 $m8 $q8 $n8 $n8 $s8 $t8 $w8 $y8 $y8 $u8 $x8 $z8 $f9 > $f9 $e9 $h9 $h9 $g9 $p9 $p9 $k9 $r9 $r9 $m9 $n9 $n9 $o9 $t9 $t9 $w9 $v9 $u9 > $u9 $z9 $x9 > > Pharo 50041 gives... > $a1 $a2 $a3 $a4 $a5 $a6 $a7 $a8 $a9 $b1 $b2 $b3 $b4 $b5 $b6 $b7 $b8 $b9 $c1 > $c2 $c3 $c4 $c5 $c6 $c7 $c8 $c9 $d1 $d2 $d3 $d4 $d5 $d6 $d7 $d8 $d9 $e1 $e2 > $e3 $e4 $e5 $e6 $e7 $e8 $e9 $f1 $f2 $f3 $f4 $f5 $f6 $f7 $f8 $f9 $g1 $g2 $g3 > $g4 $g5 $g6 $g7 $g8 $g9 $h1 $h2 $h3 $h4 $h5 $h6 $h7 $h8 $h9 $i1 $i2 $i3 $i4 > $i5 $i6 $i7 $i8 $i9 $j1 $j2 $j3 $j4 $j5 $j6 $j7 $j8 $j9 $k1 $k2 $k3 $k4 $k5 > $k6 $k7 $k8 $k9 $l1 $l2 $l3 $l4 $l5 $l6 $l7 $l8 $l9 $m1 $m2 $m3 $m4 $m5 $m6 > $m7 $m8 $m9 $n1 $n2 $n3 $n4 $n5 $n6 $n7 $n8 $n9 $o1 $o2 $o3 $o4 $o5 $o6 $o7 > $o8 $o9 $p1 $p2 $p3 $p4 $p5 $p6 $p7 $p8 $p9 $q1 $q2 $q3 $q4 $q5 $q6 $q7 $q8 > $q9 $r1 $r2 $r3 $r4 $r5 $r6 $r7 $r8 $r9 $s1 $s2 $s3 $s4 $s5 $s6 $s7 $s8 $s9 > $t1 $t2 $t3 $t4 $t5 $t6 $t7 $t8 $t9 $u1 $u2 $u3 $u4 $u5 $u6 $u7 $u8 $u9 $v1 > $v2 $v3 $v4 $v5 $v6 $v7 $v8 $v9 $w1 $w2 $w3 $w4 $w5 $w6 $w7 $w8 $w9 $x1 $x2 > $x3 $x4 $x5 $x6 $x7 $x8 $x9 $y1 $y2 $y3 $y4 $y5 $y6 $y7 $y8 $y9 $z1 $z2 $z3 > $z4 $z5 $z6 $z7 $z8 $z9 > > (start your comparison at $b5) > > So in one axis Pharo has improved Transcript, but we didn't notice the > significance of the use case we lost. > > cheers -ben > > > Please take a good look at Cuis' Transcript and consider using it. > > By default, the display is updated immediately, but without calling Morphic, it can even work with no UI framework at all. It does updates faster than Squeak or Visualworks: > > Â Â Â Â Time millisecondsToRun: [ 1000 timesRepeat:Â [ Transcript show: 'x' ] ]. 763. > > But if you want minimum overhead without immediate feedback: > > Â Â Â Â Time millisecondsToRun: [ Transcript showOnDisplay: false. 1000 timesRepeat:Â [ Transcript show: 'x' ]. Transcript showOnDisplay: true ]. 1. > Â Â Â Â "As fast as Pharo" > > It is also thread safe, and for Ben's example: > > Transcript clear. > [ > Â Â Â Â $a asciiValue to: $z asciiValue do: [ :c | > Â Â Â Â Â Â Â Â [ 1 to: 9 do: [ :i | Transcript show: c asCharacter printString , i printString , ' ' ] ] forkAt: 40 > Â Â Â Â ]. > ] forkAt: 41 > > it gives the same result as Pharo. > > The fact that the updates are not bound to Morphic also means that it is possible to do #show: deep in Morphic logic, without causing infinite loops or recursions, and get immediate > feedback. It has proved to be a useful aid in debugging Morphic code. > > Cheers, > Juan Vuletich > > > > > > -- > best,Eliot > > > > > -- > www.tudorgirba.com > > "Every thing has its own flow" > > > > > -- > best,Eliot > > > > > >

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external package handling ... a concrete case
by stepharo May 9, 2015

May 9, 2015

Hi guys I'm cleaning nautilus model and Spotter is extended. Now I will not publish the fix in Spotter, I will not update a configuration of a tool I do not know. So what should I do, stop working? No this is not possible. So I will push this changes in the inbox and integrate it and GT people should merge the fix in their baseline when they want. Or I will really stop doing anything for Pharo 50 alpha. Stef spotterActDefault ^ Nautilus openOnPackage: self

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How can I specify the bindings when evaluating an expression?
by stepharo May 9, 2015

May 9, 2015

I would like to be able to express Compiler new bindings: { a -> 3. b -> 4}; evaluate: 'a + b'; result and get 7 How can I do that? Stef

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Differences between TextConverters and ZnEncoders
by Guillermo Polito May 9, 2015

May 9, 2015

Hi! I'm struggling with the TextConverter's API in Pharo :). I wanted to test the converters in Pharo, and I found the method #convertFromSystemString: that should (from its name) convert a Pharo String into an encoded version of it. (UTF8TextConverter default convertFromSystemString: 'Ã¡'). Funny thing, it does not do that. It does the opposite: it tries to convert an encoded string to a pharo string. And so it fails. Of course, its symmetrical version does what I want and behaves as the ZnUTF8Encoder :) (UTF8TextConverter default convertToSystemString: 'Ã¡') asByteArray "#[195 161]" ZnUTF8Encoder new encodeString: 'Ã¡' "#[195 161]" Question: - does the convertTo/From methods makes sense to you or It's just me that sees them inverted? - does it make sense to have the two versions of converters? Zn and the TextConverters do the same in my opinion (or maybe I'm confused :) ) Guille

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Pharo 4 & NeoCSV
by Andreas Wacknitz May 9, 2015

May 9, 2015

I miss the configuration of NeoCSV in the configuration browser of Pharo 4. Is there any reason for the lack of it? NeoJSON is available, thoughâ¦ Regards Andreas

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