Vm-dev August 2015

vm-dev@lists.squeakfoundation.org

37 participants
78 discussions

ffi-test-main.c fails on FreeBSD
by Gary Dunn 12 Aug '16

12 Aug '16

In conjunction with getting Open Cobalt running on FreeBSD I have been looking into the problems with SqueakFFIPrims on FreeBSD and have reached a point that is beyond my understanding. I am not sure if the fix should come from the VM side or the FreeBSD port maintainer. I needed to get source code back into the ports tree so I did a make in /usr/ports/lang/squeak. I already had the 3.9 tarball, so that just repopulated the source and did the initial build. In the "files" folder I found patch files typical for a FreeBSD port. These patch source files from a generic tarball to work with FreeBSD. The one of interest was patch-platforms__unix__plugins__SqueakFFIPrims__ffi-config which contains ----x-----x----- --- platforms/unix/plugins/SqueakFFIPrims/ffi-config.org Wed Apr 26 20:27:53 2006 +++ platforms/unix/plugins/SqueakFFIPrims/ffi-config Wed Apr 26 20:29:00 2006 @@ -39,6 +39,7 @@ case ${abi} in linux) abi=sysv;; + freebsd*) abi=sysv;; darwin*) abi=darwin;; *) abi=libffi; lib="-lffi";; esac -----x-----x----- I then had the folder work/Squeak-3.9-7/platforms/unix/plugins/SqueakFFIPrims In it is a file 00README which explains how to test FFI. It says to run ffi-test-config but I have no such file. It says to type "make" to build a test suite but the build failed. It says to try with make CPU=any ABI=libffi LIB=-lffi which also failed. I traced the problem to the gcc search paths for includes and libraries -- turns out FreeBSD only searches /usr/include and /usr/lib when the required files are in /usr/local/include and /usr/local/lib. After some fiddling I finally had a "main" to test. It failed: ffi-test-main.c failed at line 361. Here is a bit from that file, ending with line 361: ffiInitialize(); for (ul= 0; ul < 15; ++ul) ffiPushSingleFloat(fa[ul]); GO(FFITypeSingleFloat, many); f= ffiReturnFloatValue(); ffiCleanup(); CHECK(f - ff < FLT_EPSILON); I worked out the CHECK macro but could not find what FLT_EPSILON is. At that point I decided to stop and come to you for help. Where do I go from here? -- Gary Dunn, Honolulu osp(a)aloha.com http://openslate.net/ http://e9erust.blogspot.com/ Sent from Slate001

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VM Recipe: How to build an interpreter VM on Linux
by David T. Lewis 07 Feb '16

07 Feb '16

How to build an interpreter VM from source on a typical Linux or Unix system: Install development tools for your Linux system (32-bit libraries are not required). Install CMake, either from your Linux distribution or from www.cmake.org Install Subversion, either from your Linux distributiion or from https://subversion.apache.org/ Make a new, empty, directory for your work. In that directory, download the full platforms sources from the Subversion repository. Download everything, whether you need it or not. The Subversion directory information will be used in the build process, so do not cut corners to save space. $ svn co http://squeakvm.org/svn/squeak/trunk/platforms Also in the new directory, download the generated sources. This is an up to date copy of source files generated from the Smalltalk source code in VMMaker. You can generate them yourself by loading VMMaker, but using the files from the Subversion repository is a faster way to get started. $ svn co http://squeakvm.org/svn/squeak/trunk/src You will now have ./platforms and ./src directories with the latest source code for the VM. Make another subdirectory called ./build that you will use to build the VM. $ mkdir build Change to the build directory. $ cd build Copy the example Makefile into your build directory. $ cp ../platforms/unix/cmake/Makefile.example Makefile Build the VM $ make Install the VM $ sudo make install You now have a VM that runs that classic Squeak image formats, including the 64-bit version (see http://build.squeak.org/job/Squeak%2064-bit%20image/). This is a traditional context interpreter VM. It will not run the latest high performance Spur image formats. Please refer to the Cog and Spur VM development at http://www.mirandabanda.org/cogblog/ and http://www.mirandabanda.org/files/Cog/VM/ for the latest Cog and Spur VM development, and for VMs that support the new Spur image formats. Dave

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Re: [squeak-dev] vm crash from BalloonEngine (maybe B2DPlugin or BitBltPlugin)
by Nicolai Hess 06 Jan '16

06 Jan '16

2015-04-08 20:02 GMT+02:00 karl ramberg <karlramberg(a)gmail.com>: > Confirmed. > > Karl > > On Wed, Apr 8, 2015 at 5:33 PM, Nicolai Hess <nicolaihess(a)web.de> wrote: > >> In order to reproduce it, draw a rectangle with radial gradient fill, >> with direction >> and normal, both of length 1. >> > This is not the reason why it crashes. It happens for other values as well: |form canvas fill direction normal| direction := 4@0. normal := 0@2. form := Form extent:300@300 depth:32. canvas := form getCanvas. fill := GradientFillStyle new colorRamp:{0 -> Color white . 0.5 -> Color green . 1 -> Color blue};origin:400@400 ;direction:direction;normal:normal;radial:true;yourself. canvas fillRectangle: (0@0 extent:800@800) fillStyle: fill. Display getCanvas drawImage: form at: 300@300 This uses a different value for direction and normal and the fill is defined for a larger area (800x800) -> CRASH Maybe, this is a rare bug, because, normally you don't create a small gradient t o fill a large area. But a vm crash is not nice, I would like to get this fixed. I am not sure what is the exact cause, but it may come from a signed integer overflwo, It looks like Balloon uses fixed point arithmetik (binary scaling). This fixed point representation (16.16 bit fixed point represented in a 32 integer) tend to overflow, especially for operations like computing the squared length of a vector x*x+y*y -> overflow -> result is a negative number. Possible solutions: downscale prior to the multiplication -> lost of precision use a larger datatype for intermediate results. It looks like B2D uses the first option (look at senders of accurateLengthOfwith and squaredLenghtOfwith Maybe there is something wrong with the other code that multiplies the values, or the 16.16 bit fixed point is just not large enough for some fills? Any ideas? Nicolai > >> This one works (no vm crash): >> |form canvas fill direction normal| >> direction := 1@0. >> normal := 0@0. >> form := Form extent:300@300 depth:32. >> canvas := form getCanvas. >> fill := GradientFillStyle new colorRamp:{0 -> Color white . 0.5 -> Color >> green . 1 -> Color blue};origin:150@150 >> ;direction:direction;normal:normal;radial:true;yourself. >> canvas fillRectangle: (50@50 extent:200@200) fillStyle: fill. >> Display getCanvas drawImage: form at: 300@300. >> >> >> direction := 1@0. >> normal := 0@0. >> -> OK >> >> direction := 0@0. >> normal := 0@1. >> -> OK >> >> direction := 1@0. >> normal := 0@1. >> -> VM-Crash (Pharo and Squeak) >> >> Pharo: >> VM Version: Cog VM 4.0.0 (release) from Feb 16 2015 >> Compiler: gcc 4.6.2 >> Interpreter Build: NBCoInterpreter >> NativeBoost-CogPlugin-EstebanLorenzano.21 uuid: >> 4d9b9bdf-2dfa-4c0b-99eb-5b110dadc697 Feb 16 2015 >> Cogit Build: NBCogit NativeBoost-CogPlugin-EstebanLorenzano.21 uuid: >> 4d9b9bdf-2dfa-4c0b-99eb-5b110dadc697 Feb 16 2015 >> Source Version: https://github.com/pharo-project/pharo-vm.git Commit: >> 55fbd0b0279998a4a33852f5afb3d213986cc3ae Date: 2015-02-16 17:54:00 +0100 >> By: Esteban Lorenzano <estebanlm(a)gmail.com> Jenkins build #14895 >> >> Current byte code: -1 >> Primitive index: 117 >> Smalltalk stack dump: >> 0x24c830 M BalloonEngine>copyLoopFaster 0x6b09b80: a(n) BalloonEngine >> 0x24c848 M BalloonEngine>copyBits 0x6b09b80: a(n) BalloonEngine >> 0x24c860 M BalloonEngine>postFlushIfNeeded 0x6b09b80: a(n) BalloonEngine >> 0x24c884 I >> BalloonEngine>drawRectangle:fill:borderWidth:borderColor:transform: >> 0x6b09b80: a(n) BalloonEngine >> 0x24c8b8 I BalloonCanvas>drawRectangle:color:borderWidth:borderColor: >> 0x6b099c0: a(n) BalloonCanvas >> 0x24c8e8 I BalloonCanvas>fillRectangle:basicFillStyle: 0x6b099c0: a(n) >> BalloonCanvas >> >> >> Squeak: >> VM Version: Cog VM 4.0.0 (release) from Aug 22 2013 >> Compiler: gcc 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) >> Interpreter Build: CoInterpreter VMMaker.oscog-eem.331 uuid: >> 37d2e4b0-2f37-4e2d-8313-c63637785e59 Aug 22 2013 >> Cogit Build: StackToRegisterMappingCogit VMMaker.oscog-eem.333 uuid: >> 84da9cb8-7f30-4cb7-b4fb-239a11f63b54 Aug 22 2013 >> Source Version: VM: r2776 http://www.squeakvm.org/svn/squeak/branches/Cog >> Plugins: r2545 >> http://squeakvm.org/svn/squeak/trunk/platforms/Cross/plugins >> >> Current byte code: -1 >> Primitive index: 117 >> >> >> nicolai >> >> >> >> >

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Do we have the new primitive?? [WAS] Re: [Pharo-project] IdentitySet but using #hash rather than #identityHash ?
by Mariano Martinez Peck 16 Dec '15

16 Dec '15

> All I can say is that I am impressed by the numbers it is really much >> faster. >> I still don't understand why I send this email with a subject say >> IdentitySet because what I really need is a fast/large IdentityDictionary >> :( Anyway, there's a place where we can use this LargeIdentitySet in Fuel >> I think). >> >> So Levente, you say this is not possible to adapt this for dictionary? >> can >> we contact Eliot to provide such a primitive? >> > > As promised, I uploaded my LargeIdentityDictionary implementation to > http://leves.web.elte.hu/**squeak/**LargeIdentityDictionary.st<http://leves.web.elte.hu/squeak/LargeIdentityDictionary.st>. > The numbers will be a bit worse compared to LargeIdentitySet, because of > the lack of the primitive, but it's still 2-3x faster than other solutions > (IdentityDictionary, PluggableIdentityDictionary, subclassing, etc). I'm > about to propose this primitive with other improvements on the vm-dev list. > > Hi Eliot/Levente. What is the status of this? Do we have already the new primitive? If true, how can we adapt LargeIdentitySet to use such new primitive? Thanks! > > Levente > > >> thanks >> >> On Fri, Dec 16, 2011 at 3:28 PM, Levente Uzonyi <leves(a)elte.hu> wrote: >> >> On Fri, 16 Dec 2011, Henrik Sperre Johansen wrote: >>> >>> On 16.12.2011 03:26, Levente Uzonyi wrote: >>> >>>> >>>> >>>>> How about my numbers? :) >>>>> >>>>> "Preallocate objects, so we won't count gc time." >>>>> n := 1000000. >>>>> objects := Array new: n streamContents: [ :stream | >>>>> n timesRepeat: [ stream nextPut: Object new ] ]. >>>>> >>>>> set := IdentitySet new: n. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "4949" >>>>> >>>>> set := LargeIdentitySet new. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "331" >>>>> >>>>> set := (PluggableSet new: n) >>>>> hashBlock: [ :object | object identityHash * 4096 + object class >>>>> identityHash * 64 ]; "Change this to #basicIdentityHash in Pharo" >>>>> equalBlock: [ :a :b | a == b ]; >>>>> yourself. >>>>> Smalltalk garbageCollect. >>>>> [1 to: n do: [ :i | set add: (objects at: i) ] ] timeToRun. "5511" >>>>> >>>>> >>>>> I also have a LargeIdentityDictionary, which is relatively fast, but >>>>> not >>>>> as fast as LargeIdentitySet, because (for some unknown reason) we don't >>>>> have a primitive that could support it. If we had a primitive like >>>>> primitive 132 which would return the index of the element if found or >>>>> 0 if >>>>> not, then we could have a really fast LargeIdentityDictionary. >>>>> >>>>> >>>>> Levente >>>>> >>>>> Hehe yes, if writing a version fully exploiting the limited range, >>>> that's >>>> probably the approach I would go for as well. >>>> (IAssuming it's the version at http://leves.web.elte.hu/** >>>> squeak/LargeIdentitySet.st<htt**p://leves.web.elte.hu/squeak/** >>>> LargeIdentitySet.st<http://leves.web.elte.hu/squeak/LargeIdentitySet.st> >>>> > >>>> ) >>>> >>>> Mariano commented in the version at http://www.squeaksource.com/** >>>> FuelExperiments <http://www.squeaksource.com/**FuelExperiments<http://www.squeaksource.com/FuelExperiments>> >>>> that it's >>>> >>>> slow for them, which I guess is due to not adopting #identityHash calls >>>> to >>>> #basicIdentityHash calls for Pharo: >>>> ((0 to: 4095) collect: [:each | each << 22 \\ 4096 ]) asSet size -> 1 >>>> So it basically uses 1 bucket instead of 4096... Whoops. :) >>>> >>>> Uploaded a new version to the MC repository which is adapted for Pharo, >>>> on the same machine my numbers were taken from, it does the same test >>>> as I >>>> used above in 871 ms. (181 with preallocation). >>>> >>>> >>> Cool. One more thing: in Squeak the method using primitive 132 directly >>> was renamed to #instVarsInclude:, so now #pointsTo: works as expected. If >>> this was also added to Pharo, then the #pointsTo: sends should be changed >>> to #instVarsInclude:, otherwise Array can be reported as included even if >>> it wasn't added. >>> I'll upload my LargeIdentityDictionary implementation to the same place >>> this evening, since it's still 2-3 factor faster than other solutionts >>> and >>> there seem to be demand for it. >>> >>> >>> Levente >>> >>> >>> Cheers, >>>> Henry >>>> >>>> >>>> >>>> >>> >> >> -- >> Mariano >> http://marianopeck.wordpress.**com <http://marianopeck.wordpress.com> >> >> > -- Mariano http://marianopeck.wordpress.com

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keyUp event modifier bitmap of is shifted by 3 on OSX
by Kruck, Bastian 27 Nov '15

27 Nov '15

Hello Folks, when looking for how Cog passes keystrokes to the image, we found that the modifier bitmap of the keyUp events is left shifted by 3 bits on OS X. This seems to be a bug in Mac OS specific event handling. sqMacUIEvents.c usually unshifts the mouse buttons away before passing it to the image, but it doesn’t do that for keyup events. Something that I oversee here? This could be a fix: Index: platforms/Mac OS/vm/sqMacUIEvents.c =================================================================== --- platforms/Mac OS/vm/sqMacUIEvents.c (revision 3312) +++ platforms/Mac OS/vm/sqMacUIEvents.c (working copy) @@ -1717,7 +1717,7 @@ //fprintf(stdout,"\nrawkey up %i",ioMSecs()); key = findInKeyMap(keyCode); if (key != -1) { - enterKeystroke ( EventTypeKeyboard,keyCode, EventKeyUp, 0, ModifierStateCarbon(event,0)); + enterKeystroke ( EventTypeKeyboard,keyCode, EventKeyUp, 0, ModifierStateCarbon(event,0) >> 3); } removeFromKeyMap(keyCode); result = eventNotHandledErr; Unfortunately, I couldn’t verify the fix as I am running Yosemite which seems to not be supported yet for building from source. I appended the changeset which we used to find that issue. Steps to reproduce: 1) install our changeset into a Squeak4.5 image on OS X 2) run `TempSettings printEvents: true.` 3) open a Transcript 4) Press cmd+a 5) The fifth item of that Array should be 8 on the third time (but is 8<<3 instead) #(2 15512120 0 1 8 0 0 1) #(2 15512120 97 0 8 97 0 1) #(2 15512198 0 2 64 0 0 1) Tobias commented that this bug could be duplicated to some other places (which we didn’t verify yet). I am not sure, how many projects already rely on this behavior and how to go on with that. BR, Bastian Kruck

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Minimum 32-bit libs for Ubuntu
by David T. Lewis 27 Sep '15

27 Sep '15

I'm afraid this is yet another annoying Ubuntu question but I'll ask here anyway. I just got a new laptop machine with Ubuntu 15.04 pre-installed. Can someone remind me of the short list of 32-bit libraries that need to be installed? Sorry for the newbie question but I'm trying to avoid cluttering a new system with random package installs. So far I have: sudo apt-get install lib32z1 sudo apt-get install libbx11-6:i386 Presumably I'm missing a package related to X11 because I am getting the (possibly misleading) "could not find display driver vm-display-X11" runtime error. Thanks, Dave

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Pharo crash
by Sabine Manaa 18 Sep '15

18 Sep '15

Hi, I have a Pharo 4.0 Image which crashes several seconds after starting it. This is the 2nd time I have this. I have to start with fresh image and load my stuff from scratch. Is this a known bug? Do you need the image? If yes, please tell me a mail address to send it to. Regards Sabine

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[win32] Morphic event timeStamp bug
by Marcel Taeumel 15 Sep '15

15 Sep '15

Hi! We identified a bug concerning either the #timeStamp in MorphicEvent objects or Time >> #millisecondClockValue. Inspecting the result of "ActiveEvent timeStamp - Time millisecondClockValue" returns a suspiciously high number. 21373801 on my last try. So, the primitive 135, which is used for #millisecondClockValue, points (cointerp.c) to ioMSecs(). For Windows this is "GetTickCount() &0x3FFFFFFF;" (sqWin32Time.C). Then, the keyboard event (here: CMD+P) gets its timeStamp assigned from the MSG structure in sqWin32Window.c, which is good: int recordKeyboardEvent(MSG *msg) { ... evt->timeStamp = msg->time; ... } ((( Only for drag/drop events into the VM, it uses ioMicroMSecs() [cointerp.c], which is timeGetTime() and has a higher accuracy. ))) The MSDN says this: MSG structure https://msdn.microsoft.com/en-us/library/windows/desktop/ms644958%28v=vs.85… GetTickCount() https://msdn.microsoft.com/en-us/library/windows/desktop/ms724408%28v=vs.85… GetMessageTime() https://msdn.microsoft.com/en-us/library/windows/desktop/ms644939%28v=vs.85… And some interesting discussions about msg->time vs. GetMessageTime() : http://blogs.msdn.com/b/oldnewthing/archive/2014/01/22/10491576.aspx Some ideas/questions: - Why isn't the MillisecondClockMask applied to the message time as in sqMacUIEvents.c ? - Hmmmm.... Best, Marcel & Bert -- View this message in context: http://forum.world.st/win32-Morphic-event-timeStamp-bug-tp4824244.html Sent from the Squeak VM mailing list archive at Nabble.com.

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"missing" exports on the windows vm
by Nicolai Hess 14 Sep '15

14 Sep '15

We have a failing test case for NB NBInterpreterProxyTest>>#testStackPointer it fails because NativeBoost loadSymbol: 'stackPointerAddress' fromModule: NativeBoost VMModule returns nil This works for the linux vm! There are other methods that can be loaded, for example: (NativeBoost loadSymbol: 'primitiveAllObjects' fromModule: NativeBoost VMModule) -> returns an address. This stopped working for the windows pharo vm around june 2014. The source that changed is cointerp.h, the prior version had EXPORT(...) declarations around all functions in cointerp.h, the current version not. Three questions: 1. Why does this still work on linux? Does it export all functions declared in a header? 2. why was it changed? (I could not found the change in the code generator, maybe we exported all functions with pragma #api and now only those with pragma #export ? 3. do we need this function to be exported? Apart from this testcases, this method is called the on image startup, but the nil return does not harm. It seems it is not part of the main vm api (like the interpreter proxy functions callable from external modules) and I didn't see code thet depend on this. There are similiar functions for which we load the function address on startup: cStackPointerAddress and cFramePointerAddress, this seems to work, but I don't know if the expected result is different. In NBInterpreterProxy>>#initialize, we try to load all fourmethods: stackPointerAddress/framePointerAddress -> nil cStackPointerAddress / cFramePointerAddress -> not nil nicolai

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Maintainer of FFI-Package
by Nicolai Hess 12 Sep '15

12 Sep '15

Who is the maintainer of the FFI-Package for Squeak and/or Pharo ? I especially interested in the FFI-Unix examples and the state on working FFI on linux for current squeak release (AFAIK it does not work with "squeak all in one" 4.5) regards Nicolai

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Vm-dev August 2015