Vm-dev March 2011

vm-dev@lists.squeakfoundation.org

43 participants
133 discussions

Error compiling Cog.
by Mariano Martinez Peck 04 Apr '11

04 Apr '11

I started once again having bad luck compiling VMs....I did git clone git://gitorious.org/cogvm/blessed.git then I download a PharoCore1.3 fresh and I evaluated: Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfCog'; load. (ConfigurationOfCog project version: '1.3') load Gofer new squeaksource: 'VMMaker'; package: 'CMakeVMMaker'; load. Then I moved the image to /blessed/image Then I evaluated: CogMacOSConfig generateWithSources And finally, cmake . And I have this error: In file included from /Users/mariano/bin/blessed/platforms/unix/vm/sqUnixThreads.c:18: /Users/mariano/bin/blessed/platforms/Cross/vm/sq.h:182: warning: ignoring #pragma auto_inline off /Users/mariano/bin/blessed/platforms/Cross/vm/sq.h:184: warning: ignoring #pragma auto_inline on Linking CXX executable CogVM.app/Contents/MacOS/CogVM Undefined symbols: "_ifValidWriteBackStackPointersSaveTo", referenced from: _reportStackState in sqMacMain.c.o _reportStackState in sqMacMain.c.o ld: symbol(s) not found collect2: ld returned 1 exit status make[2]: *** [CogVM.app/Contents/MacOS/CogVM] Error 1 make[1]: *** [CMakeFiles/CogVM.dir/all] Error 2 make: *** [all] Error 2 any hints? thanks Mariano

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[OT] Blog sequence "Journey through the VM"
by Mariano Martinez Peck 02 Apr '11

02 Apr '11

Hi folks. I will start a sequence of VM related posts called “Journey through the VM”, similar to what Igor did in Deep Smalltalk School<http://www.inria.fr/centre-de-recherche-inria/lille-nord-europe/agenda/smal…>. My main focus is that a regular Smalltalker, without any knowledge in VM stuff can understand the basis of it (ObjectMemory, Interpreter, etc). In addition, I expect the reader can download, change, compile, run, and debug (and why not fixing?) the VM. Later on in the journey, I would also like to talk about what the compiler does, what bytecodes are, how to read them, how they are mapped to the VM, etc. I will also show some hooks or tricks that the VM provides and that are not always known. Moreover, I will explain what a primitive is, how they are executed by the VM, how you can write your own primitives, etc. FFI and writing your own plugin are also in my plans. It is important to notice that all these posts are thought for VM newbies. I would appreciate if there can be some VM hackers paying attention that I don't say stupid things. http://marianopeck.wordpress.com/ Cheers

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[CMake] Can we create StackInterpreterDebugMacOSConfig ?
by Mariano Martinez Peck 01 Apr '11

01 Apr '11

I've just create it: StackInterpreterMacOSConfig subclass: #StackInterpreterDebugMacOSConfig instanceVariableNames: '' classVariableNames: '' poolDictionaries: '' category: 'CMakeVMMaker' And implemented: StackInterpreterDebugMacOSConfig >> compilerFlags ^ self commonCompilerFlags, ' ' ,self compilerFlagsDebug Is this correct ? I would like to complelty debug with XCode out of the box. Thanks Mariano

2 5

[Cog] cmType ~= CMMethod
by Mariano Martinez Peck 01 Apr '11

01 Apr '11

Hi Eliot. I am having some asserts failing while running my tests. Most of them during the sweep phase of the GC. The two places where it fails is in - NewCoObjectMemory >> lastPointerWhileForwarding: oop if fails the assert: self assert: (coInterpreter cCoerceSimple: methodHeader to: #'CogMethod *') cmType = CMMethod. In different runs, the cmType answer me 1 (CMFree) - NewCoObjectMemory >> lastPointerOf: oop recordWeakRoot: recordWeakRoot "<Boolean>" and it fails in the same assert: self assert: (coInterpreter cCoerceSimple: methodHeader to: #'CogMethod *') cmType = CMMethod. In different runs, I got values 0 or 6. BTW....seing: initializeCogMethodConstants CMOpenPIC := 1 + (CMClosedPIC := 1 + (CMBlock := 1 +(CMMethod := 1 + (CMFree := 1)))) I cannot understand how can I get 0 or 6.... Anyway, my question is if you have a clue of what can be happening so that those asserts are failing. I am using Objects as methods, but normal objects (subclasses of ProtoObject). Thanks in advance, mariano

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[Q] Can I convert old image (3.8 based image) for using with newer VM (like Cog)?
by Sungjin Chun 01 Apr '11

01 Apr '11

Sorry if this question is not appropriate to this mailing list. Can I convert my good old image(3.8 based MVC) so that I can use with newer VM like Cog? Thanks in advance.

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[commit] r2375 - Remove reference to undefined symbol "error". Resolve symbols eagerly on FreeBSD.
by commits＠squeakvm.org 31 Mar '11

31 Mar '11

Author: piumarta Date: 2011-03-30 18:48:46 -0700 (Wed, 30 Mar 2011) New Revision: 2375 Modified: trunk/platforms/unix/ChangeLog trunk/platforms/unix/vm-display-X11/sqUnixX11.c trunk/platforms/unix/vm/sqUnixExternalPrims.c Log: Remove reference to undefined symbol "error". Resolve symbols eagerly on FreeBSD. Modified: trunk/platforms/unix/ChangeLog =================================================================== --- trunk/platforms/unix/ChangeLog 2011-03-30 08:24:30 UTC (rev 2374) +++ trunk/platforms/unix/ChangeLog 2011-03-31 01:48:46 UTC (rev 2375) @@ -1,3 +1,9 @@ +2011-03-31 Ian Piumarta <piumarta(a)freebsd.piumarta.com> + + * vm/sqUnixExternalPrims.c: Resolve symbols eagerly on FreeBSD. + + * vm-display-X11/sqUnixX11.c (initPixmap): Remove reference to undefined function "error". + 2011-03-30 Ian Piumarta <piumarta(a)freebsd.piumarta.com> * plugins/FloatMathPlugin/config.cmake: Re-enable GCC optimisations. Modified: trunk/platforms/unix/vm/sqUnixExternalPrims.c =================================================================== --- trunk/platforms/unix/vm/sqUnixExternalPrims.c 2011-03-30 08:24:30 UTC (rev 2374) +++ trunk/platforms/unix/vm/sqUnixExternalPrims.c 2011-03-31 01:48:46 UTC (rev 2375) @@ -100,11 +100,6 @@ extern int sqIgnorePluginErrors; #endif -#if defined(__FreeBSD__) -# undef RTLD_NOW -# define RTLD_NOW RTLD_LAZY -#endif - /*** options ***/ extern char *squeakPlugins; Modified: trunk/platforms/unix/vm-display-X11/sqUnixX11.c =================================================================== --- trunk/platforms/unix/vm-display-X11/sqUnixX11.c 2011-03-30 08:24:30 UTC (rev 2374) +++ trunk/platforms/unix/vm-display-X11/sqUnixX11.c 2011-03-31 01:48:46 UTC (rev 2375) @@ -3073,7 +3073,7 @@ for (b= 0; b < 6; b++) { int i= 40 + ((36 * r) + (6 * b) + g); - if (i > 255) error("index out of range in color table compuation"); + /* if (i > 255) error("index out of range in color table compuation"); */ initColourmap(i, (r * 65535) / 5, (g * 65535) / 5, (b * 65535) / 5); } }

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Re: [Pharo-project] Issue 3908 in pharo: Fix for pool variables references
by Igor Stasenko 30 Mar '11

30 Mar '11

On 29 March 2011 17:44, <pharo(a)googlecode.com> wrote: > Updates: > Status: FixToInclude > Labels: Milestone-1.3 Importance-High > > Comment #1 on issue 3908 by siguc...(a)gmail.com: Fix for pool variables > references > http://code.google.com/p/pharo/issues/detail?id=3908 > > (No comment was entered for this change.) > > > Finally i could navigate all uses of shared variables (class vars and pool vars), by simply pressing cmd-shift-n ! Its been years since i looked for that feature.. and fix was quite simple. -- Best regards, Igor Stasenko AKA sig.

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Re: [squeak-dev] Re: Separate TeaTime (was Re: Re: Teleplace is hiring...)
by Eliot Miranda 30 Mar '11

30 Mar '11

Hi All, Andreas, vm-devs this is a question of y'all. Recently I integrated some of the merge of Alien callback support into ReentrantFFIPlugin. This broke OpenGL example in images not containing Alien. Here's the breakage: As part of Alien marshalling the FFI plugin needs to know if an argument is an Alien and hence dereference it correctly to pass its address. Here's the code in ReentrantFFIPlugin >>ffiAtomicArgByReference:Class:in: isAlien := (isString := interpreterProxy includesBehavior: oopClass ThatOf: interpreterProxy classString) ifTrue: [false] ifFalse: [interpreterProxy includesBehavior: oopClass ThatOf: interpreterProxy classAlien]. This is erroneously setting isAlien to true when oopClass is Bitmap (i.e. when uploadFont: tries to glBitmap:with:with:with:with:with:with: a Bitmap). That causes the marshaller to treat the Bitmap as if it were an Alien and pass a field in the Bitmap instead of the Bitmap's base address. Boom. The problem is that a) if Alien isn't installed in the image then interpreterProxy classAlien == interpreterProxy nilObject, and b) includesBehavior:ThatOf: always answers true if its second argument is nilObject. I suggest that includesBehavior:ThatOf: is incorrect: StackInterpreter methods for plugin primitive support includesBehavior: aClass ThatOf: aSuperclass "Return the equivalent of aClass includesBehavior: aSuperclass. Note: written for efficiency and better inlining (only 1 temp)" | theClass | <inline: true> (((theClass := aClass) = aSuperclass) "aClass == aSuperclass" or:[aSuperclass = objectMemory nilObject]) "every class inherits from nil" ifTrue:[^true]. [(theClass := self superclassOf: theClass) = aSuperclass ifTrue:[^true]. theClass ~= objectMemory nilObject] whileTrue. ^false Classes *don't* inherit from nil. nil is at the end of their superclass chain. That's different from inheriting. At least in current images UndefinedObject includesBehavior: nil is false, which seems right to me. nil is not a behavior; its use as the sentinel at the end of the superclass chain doesn't imply it is a behavior. So I propose that we change includesBehavior:ThatOf: to something like StackInterpreter methods for plugin primitive support includesBehavior: aClass ThatOf: aSuperclass "Return the equivalent of aClass includesBehavior: aSuperclass. Note: written for efficiency and better inlining (only 1 temp)" | theClass | <inline: true> aSuperclass = objectMemory nilObject ifTrue: [^false]. theClass := aClass. [theClass = aSuperclass ifTrue: [^true]. theClass ~= objectMemory nilObject] whileTrue: [theClass := self superclassOf: theClass]. ^false I don't think this will affect anything other than FFI and Alien since those are the only uses I can find, and in my reading of that code the proposed change seems fine; safer in fact. Agreed? On Thu, Mar 17, 2011 at 12:30 PM, Matthew Fulmer <tapplek(a)gmail.com> wrote: > On Thu, Mar 17, 2011 at 11:23:57AM -0700, Andreas Raab wrote: > > On 3/17/2011 10:59, Lawson English wrote: > > > The biggest holdup for getting these things into the Squeak trunk is > > > simply getting Cobalt itself into the Squeak trunk so it can run on VM > > > 4.2. If anyone wants to help Matt with THAT project, I'm pretty sure he > > > will be happy for the assist. > > > > What do you need help with? > > The holdup is the VM's actually: > > - Recent Cog VM's crash on startup from OpenGL/FFI > - Windows interpreter VM crashes on startup from JPEGPlugin > - Unix interpreter VM has broken MPEGPlugin > - Mac VM hasn't been extensively tested; John's latest may work, > but Esteban's is missing plugins > > Old Cog VM's (2316) almost work, but: > - Windows VM is missing SoundPlugin > - At least on windows, the router sockets timeout after they've > been running for 30 minutes or so > > There is very little that needs doing image-side; I've already > done that part. Since we have a zero-regression policy for the > official Cobalt releases, we can't release until we have working > VM's. None of us are VM devs, and we have plenty to work on > while we wait, so we're just waiting for the VM guys right now. > > -- > Matthew Fulmer (a.k.a. Tapple) > >

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[commit] r2374 - Re-enable FloatMathPlugin optimisation. Resolve plugin symbols lazily on FreeBSD.
by commits＠squeakvm.org 30 Mar '11

30 Mar '11

Author: piumarta Date: 2011-03-30 01:24:30 -0700 (Wed, 30 Mar 2011) New Revision: 2374 Modified: trunk/platforms/unix/ChangeLog trunk/platforms/unix/plugins/FloatMathPlugin/config.cmake trunk/platforms/unix/vm/sqUnixExternalPrims.c Log: Re-enable FloatMathPlugin optimisation. Resolve plugin symbols lazily on FreeBSD. Modified: trunk/platforms/unix/ChangeLog =================================================================== --- trunk/platforms/unix/ChangeLog 2011-03-21 17:48:42 UTC (rev 2373) +++ trunk/platforms/unix/ChangeLog 2011-03-30 08:24:30 UTC (rev 2374) @@ -1,3 +1,9 @@ +2011-03-30 Ian Piumarta <piumarta(a)freebsd.piumarta.com> + + * plugins/FloatMathPlugin/config.cmake: Re-enable GCC optimisations. + + * vm/sqUnixExternalPrims.c: Resolve symbols lazily on FreeBSD. + 2011-03-14 Ian Piumarta <com -dot- gmail -at- piumarta (backwards)> * plugins/SerialPlugin/sqUnixSerial.c (portOpenFailed): Ensure Modified: trunk/platforms/unix/plugins/FloatMathPlugin/config.cmake =================================================================== --- trunk/platforms/unix/plugins/FloatMathPlugin/config.cmake 2011-03-21 17:48:42 UTC (rev 2373) +++ trunk/platforms/unix/plugins/FloatMathPlugin/config.cmake 2011-03-30 08:24:30 UTC (rev 2374) @@ -7,10 +7,10 @@ PLUGIN_DEFINITIONS (-D__LITTLE_ENDIAN=1) ENDIF () +SET (LIBM_CFLAGS "${CMAKE_C_FLAGS}") + # GCC optimizations break fdlibm so disable them for now. - -IF (CMAKE_COMPILER_IS_GNUCC) - SET (LIBM_CFLAGS "${CMAKE_C_FLAGS} -O0 -mno-fused-madd") -ELSE () - SET (LIBM_CFLAGS "${CMAKE_C_FLAGS}") -ENDIF () +# +# IF (CMAKE_COMPILER_IS_GNUCC AND CMAKE_SYSTEM_NAME STREQUAL "Linux") +# SET (LIBM_CFLAGS "${CMAKE_C_FLAGS} -O0 -mno-fused-madd") +# ENDIF () Modified: trunk/platforms/unix/vm/sqUnixExternalPrims.c =================================================================== --- trunk/platforms/unix/vm/sqUnixExternalPrims.c 2011-03-21 17:48:42 UTC (rev 2373) +++ trunk/platforms/unix/vm/sqUnixExternalPrims.c 2011-03-30 08:24:30 UTC (rev 2374) @@ -100,6 +100,11 @@ extern int sqIgnorePluginErrors; #endif +#if defined(__FreeBSD__) +# undef RTLD_NOW +# define RTLD_NOW RTLD_LAZY +#endif + /*** options ***/ extern char *squeakPlugins;

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FreeBSD 4.4.7-2357 still hangs
by Gary Dunn 30 Mar '11

30 Mar '11

Just edited and re-maked the vm, now it just hangs, same as before. I even bypassed the shell script and ran the vm directly as /usr/local/lib/squeak/4.4.7-2357/squeakvm Seems to me that should result in something about not specifying an image file. It just hangs until I ctrl-C. Here is the patch I used in sqUnixX11.c, just after #include "sqUnixMain.h" #include "sqUnixGlobals.h" #include "sqUnixCharConv.h" #include "sqaio.h" /* define missing error function for FreeBSD --gd */ #ifndef error /* error() function called from Interpreter */ /* Default definition if not previously defined in config.h */ #define error(str) defaultErrorProc(str) #endif -- Gary Dunn Honolulu

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Vm-dev March 2011