Vm-dev October 2014

vm-dev@lists.squeakfoundation.org

38 participants
133 discussions

Re: [Pharo-dev] Image Segment semantics and weakness
by Eliot Miranda 20 Oct '14

20 Oct '14

On Mon, Oct 20, 2014 at 8:26 AM, stepharo <stepharo(a)free.fr> wrote: > While I as a big fan of imageSegment and proposed to mariano to work on > imageSegment2 (it was the original idea for his phd) > he convinced us that imagesegment were not worth their complexity. > I absolutely agree. > So why do you want to have imageSegment? > Because of backwards-compatibility. If Spur does not provide image segments then the barrier to entry for Terf, eToys and Squeak may be too high. Spur is supposed to be a plug-in replacement for Cog, not something that requires lots of effort to port to. > Stef > > > > On 20/10/14 03:01, Eliot Miranda wrote: > > Hi All, > > I want to check my understanding of reference semantics for image > segments as I'm close to completing the Spur implementation. Specifically > the question is whether objects reachable only through weak pointers should > be included in an image segment or not. > > Remember that an image segment is created from the transitive closure of > an Array of root objects, the *segment roots*. i.e. we can think of an > image segment as a set of objects created by tracing the object graph from > the segment roots. > > The segment always includes the segment roots. Except for the roots, > objects are excluded from the segment that are also reachable form the > roots of the system (the *system roots*, effectively the root > environment, Smalltalk, and the stack of the current process). > > Consider a weak array in the transitive closure that is not reachable > from the system roots, and hence should be included in the segment. > Objects referenced from that weak array may be in one of three categories > > - reachable from the system roots (and hence not to be included in the > segment) > - *not* reachable form the system roots, but reachable from the segment > roots via strong pointers (and hence to be included in the segment) > - *not* reachable form the system roots, *not* reachable from the segment > roots via strong pointers > > Should this last category be included or excluded from the segment? I > think that it makes no difference, and excluding them is only an > optimization. The argument is as follows. Imagine that immediately after > loading the image segment there is a garbage collection. That garbage > collection will collect all the objects in the last category as they are > only reachable from the weak arrays in the segment. Hence we are free to > follow weak references as if they are strong when we create the image > segment, leaving it to subsequent events to reclaim those objects. > > An analogous argument accounts for objects reachable from ephemerons. > Is my reasoning sound? > -- > best, > Eliot > > > -- best, Eliot

2 1

squeak decompiler
by Whiter Walt 20 Oct '14

20 Oct '14

Hi, I am interested in the Squeak Decompiler class. Is there any technical information in the net, which explains the functionality? Or maybe it follows some common "rules", I can find in some paper or book? cheers Walt

4 6

DPI Virtualization
by Marcel Taeumel 20 Oct '14

20 Oct '14

The newest Cog VMs seem to send "I know about DPI virtualization" to the operating system. Can this be turned off again via command line parameter? :) Here is why: MS Windows provides an easy way to turn off automatic scaling for old-style programs so that you can see every pixel again. Seems to be much easier than on MacOS systems. On my Surface, however, I have a high pixel density and prefer the scaling because my Squeak does not have high-resolution icons and fonts etc. Now, with the newest Cog VMs, everything is always too small for me. :-/ Best, Marcel -- View this message in context: http://forum.world.st/DPI-Virtualization-tp4784729.html Sent from the Squeak VM mailing list archive at Nabble.com.

3 5

VM Maker: VMMaker.oscog-eem.905.mcz
by commits＠source.squeak.org 18 Oct '14

18 Oct '14

Eliot Miranda uploaded a new version of VMMaker to project VM Maker: http://source.squeak.org/VMMaker/VMMaker.oscog-eem.905.mcz ==================== Summary ==================== Name: VMMaker.oscog-eem.905 Author: eem Time: 18 October 2014, 11:48:04.111 am UUID: 1950998d-1b02-4101-b5ca-17c00dd41e86 Ancestors: VMMaker.oscog-eem.904 No longer parenthesize BaseHeaderSize (and soon BytesPerOop and BytesPerWord) for upcoming 64-bit changes. Fix parenthesization bugs in validation code in some Alien plugin primtiives. =============== Diff against VMMaker.oscog-eem.904 =============== Item was changed: ----- Method: CCodeGenerator>>emitBuiltinConstructAsArgumentFor:on:level: (in category 'utilities') ----- emitBuiltinConstructAsArgumentFor: msgNode on: aStream level: level "If the given selector is in the translation dictionary, translate it into a target code construct and return true. Otherwise, do nothing and return false." | action | + (self shouldGenerateAsInterpreterProxySend: msgNode) ifTrue: - (self messageReceiverIsInterpreterProxy: msgNode) ifTrue: [^false]. action := asArgumentTranslationDict at: msgNode selector ifAbsent: [translationDict at: msgNode selector ifAbsent: [ ^false ]]. self perform: action with: msgNode with: aStream with: level. ^true! Item was changed: ----- Method: CCodeGenerator>>emitBuiltinConstructFor:on:level: (in category 'utilities') ----- emitBuiltinConstructFor: msgNode on: aStream level: level "If the given selector is in the translation dictionary, translate it into a target code construct and return true. Otherwise, do nothing and return false." | action | + (self shouldGenerateAsInterpreterProxySend: msgNode) ifTrue: - (self messageReceiverIsInterpreterProxy: msgNode) ifTrue: [^false]. action := translationDict at: msgNode selector ifAbsent: [ ^false ]. self perform: action with: msgNode with: aStream with: level. ^true! Item was changed: ----- Method: CCodeGenerator>>emitCExpression:on:indent: (in category 'C code generator') ----- emitCExpression: aParseNode on: aStream indent: level "Emit C code for the expression described by the given parse node." + (aParseNode isLeaf + or: [aParseNode isSend + and: [#(bytesPerOop bytesPerWord baseHeaderSize) includes: aParseNode selector]]) - aParseNode isLeaf ifTrue: ["omit parens" aParseNode emitCCodeAsExpressionOn: aStream level: level generator: self] ifFalse: [aStream nextPut: $(. aParseNode emitCCodeAsExpressionOn: aStream level: level generator: self. aStream nextPut: $)]! Item was added: + ----- Method: CCodeGenerator>>generateBytesPerOop:on:indent: (in category 'C translation') ----- + generateBytesPerOop: msgNode on: aStream indent: level + "Generate the C code for this message onto the given stream. + Would prefer to use OopSize than BytesPerOop (shorter)." + + aStream nextPutAll: 'BytesPerOop'! Item was changed: ----- Method: CCodeGenerator>>initializeCTranslationDictionary (in category 'C translation') ----- initializeCTranslationDictionary "Initialize the dictionary mapping message names to actions for C code generation." | pairs | translationDict := Dictionary new: 200. pairs := #( #& #generateAnd:on:indent: #| #generateOr:on:indent: #and: #generateSequentialAnd:on:indent: #or: #generateSequentialOr:on:indent: #not #generateNot:on:indent: #+ #generatePlus:on:indent: #- #generateMinus:on:indent: #negated #generateNegated:on:indent: #* #generateTimes:on:indent: #/ #generateDivide:on:indent: #// #generateDivide:on:indent: #\\ #generateModulo:on:indent: #<< #generateShiftLeft:on:indent: #>> #generateShiftRight:on:indent: #min: #generateMin:on:indent: #max: #generateMax:on:indent: #between:and: #generateBetweenAnd:on:indent: #bitAnd: #generateBitAnd:on:indent: #bitOr: #generateBitOr:on:indent: #bitXor: #generateBitXor:on:indent: #bitShift: #generateBitShift:on:indent: #signedBitShift: #generateSignedBitShift:on:indent: #bitInvert32 #generateBitInvert32:on:indent: #bitClear: #generateBitClear:on:indent: #truncateTo: #generateTruncateTo:on:indent: #rounded #generateRounded:on:indent: #< #generateLessThan:on:indent: #<= #generateLessThanOrEqual:on:indent: #= #generateEqual:on:indent: #> #generateGreaterThan:on:indent: #>= #generateGreaterThanOrEqual:on:indent: #~= #generateNotEqual:on:indent: #== #generateEqual:on:indent: #~~ #generateNotEqual:on:indent: #isNil #generateIsNil:on:indent: #notNil #generateNotNil:on:indent: #whileTrue: #generateWhileTrue:on:indent: #whileFalse: #generateWhileFalse:on:indent: #whileTrue #generateDoWhileTrue:on:indent: #whileFalse #generateDoWhileFalse:on:indent: #to:do: #generateToDo:on:indent: #to:by:do: #generateToByDo:on:indent: #repeat #generateRepeat:on:indent: #ifTrue: #generateIfTrue:on:indent: #ifFalse: #generateIfFalse:on:indent: #ifTrue:ifFalse: #generateIfTrueIfFalse:on:indent: #ifFalse:ifTrue: #generateIfFalseIfTrue:on:indent: #ifNotNil: #generateIfNotNil:on:indent: #ifNil: #generateIfNil:on:indent: #ifNotNil:ifNil: #generateIfNotNilIfNil:on:indent: #ifNil:ifNotNil: #generateIfNilIfNotNil:on:indent: #at: #generateAt:on:indent: #at:put: #generateAtPut:on:indent: #basicAt: #generateAt:on:indent: #basicAt:put: #generateAtPut:on:indent: #integerValueOf: #generateIntegerValueOf:on:indent: #integerObjectOf: #generateIntegerObjectOf:on:indent: #isIntegerObject: #generateIsIntegerObject:on:indent: #cCode: #generateInlineCCode:on:indent: #cCode:inSmalltalk: #generateInlineCCode:on:indent: #cPreprocessorDirective: #generateInlineCPreprocessorDirective:on:indent: #cppIf:ifTrue:ifFalse: #generateInlineCppIfElse:on:indent: #cppIf:ifTrue: #generateInlineCppIfElse:on:indent: #cCoerce:to: #generateCCoercion:on:indent: #cCoerceSimple:to: #generateCCoercion:on:indent: #addressOf: #generateAddressOf:on:indent: #addressOf:put: #generateAddressOf:on:indent: #asAddress:put: #generateAsAddress:on:indent: #signedIntFromLong #generateSignedIntFromLong:on:indent: #signedIntToLong #generateSignedIntToLong:on:indent: #signedIntFromShort #generateSignedIntFromShort:on:indent: #signedIntToShort #generateSignedIntToShort:on:indent: #preIncrement #generatePreIncrement:on:indent: #preDecrement #generatePreDecrement:on:indent: #inline: #generateInlineDirective:on:indent: #asFloat #generateAsFloat:on:indent: #asInteger #generateAsInteger:on:indent: #asUnsignedInteger #generateAsUnsignedInteger:on:indent: #asLong #generateAsLong:on:indent: #asUnsignedLong #generateAsUnsignedLong:on:indent: #asVoidPointer #generateAsVoidPointer:on:indent: #asSymbol #generateAsSymbol:on:indent: #flag: #generateFlag:on:indent: #anyMask: #generateBitAnd:on:indent: #noMask: #generateNoMask:on:indent: #raisedTo: #generateRaisedTo:on:indent: #touch: #generateTouch:on:indent: + #bytesPerOop #generateBytesPerOop:on:indent: #bytesPerWord #generateBytesPerWord:on:indent: #baseHeaderSize #generateBaseHeaderSize:on:indent: #sharedCodeNamed:inCase: #generateSharedCodeDirective:on:indent: #perform: #generatePerform:on:indent: #perform:with: #generatePerform:on:indent: #perform:with:with: #generatePerform:on:indent: #perform:with:with:with: #generatePerform:on:indent: #perform:with:with:with:with: #generatePerform:on:indent: #perform:with:with:with:with:with: #generatePerform:on:indent: #value #generateValue:on:indent: #value: #generateValue:on:indent: #value:value: #generateValue:on:indent: #value:value:value: #generateValue:on:indent: #deny: #generateDeny:on:indent: #shouldNotImplement #generateSmalltalkMetaError:on:indent: #shouldBeImplemented #generateSmalltalkMetaError:on:indent: #subclassResponsibility #generateSmalltalkMetaError:on:indent: ). 1 to: pairs size by: 2 do: [:i | translationDict at: (pairs at: i) put: (pairs at: i + 1)]. pairs := #( #ifTrue: #generateIfTrueAsArgument:on:indent: #ifFalse: #generateIfFalseAsArgument:on:indent: #ifTrue:ifFalse: #generateIfTrueIfFalseAsArgument:on:indent: #ifFalse:ifTrue: #generateIfFalseIfTrueAsArgument:on:indent: #ifNotNil: #generateIfNotNilAsArgument:on:indent: #ifNil: #generateIfNilAsArgument:on:indent: #ifNotNil:ifNil: #generateIfNotNilIfNilAsArgument:on:indent: #ifNil:ifNotNil: #generateIfNilIfNotNilAsArgument:on:indent: #cCode: #generateInlineCCodeAsArgument:on:indent: #cCode:inSmalltalk: #generateInlineCCodeAsArgument:on:indent: #cppIf:ifTrue:ifFalse: #generateInlineCppIfElseAsArgument:on:indent: #cppIf:ifTrue: #generateInlineCppIfElseAsArgument:on:indent: #value #generateValueAsArgument:on:indent: #value: #generateValueAsArgument:on:indent: #value:value: #generateValueAsArgument:on:indent: ). asArgumentTranslationDict := Dictionary new: 8. 1 to: pairs size by: 2 do: [:i | asArgumentTranslationDict at: (pairs at: i) put: (pairs at: i + 1)]. ! Item was added: + ----- Method: CCodeGenerator>>mostBasicConstantSelectors (in category 'accessing') ----- + mostBasicConstantSelectors + "c.f. VMBasicConstants class>>#mostBasicConstantNames" + ^#(baseHeaderSize bytesPerOop bytesPerWord)! Item was added: + ----- Method: CCodeGenerator>>shouldGenerateAsInterpreterProxySend: (in category 'utilities') ----- + shouldGenerateAsInterpreterProxySend: aSendNode + ^(self messageReceiverIsInterpreterProxy: aSendNode) + and: [(self mostBasicConstantSelectors includes: aSendNode selector) not]! Item was changed: ----- Method: IA32ABIPlugin>>primBoxedFree (in category 'primitives-memory management') ----- primBoxedFree "Free the memory referenced by the receiver, an Alien." "proxy <Alien> primFree ^<Alien> <primitive: 'primBoxedFree' error: errorCode module: 'IA32ABI'>" | addr rcvr ptr sizeField | <export: true> <var: #ptr type: 'sqInt *'> <var: #sizeField type: 'long'> rcvr := interpreterProxy stackObjectValue: 0. + (interpreterProxy byteSizeOf: rcvr) >= (2 * interpreterProxy bytesPerOop) ifFalse: - (interpreterProxy byteSizeOf: rcvr) >= 2 * BytesPerOop ifFalse: [^interpreterProxy primitiveFailFor: PrimErrBadReceiver]. ptr := interpreterProxy firstIndexableField: rcvr. sizeField := ptr at: 0. addr := ptr at: 1. "Don't you dare to free Squeak's memory!!" (sizeField >= 0 or: [addr = 0 or: [interpreterProxy isInMemory: addr]]) ifTrue: [^interpreterProxy primitiveFailFor: PrimErrInappropriate]. self cCode: 'free((void *)addr)' inSmalltalk: [self Cfree: addr]. ptr at: 0 put: 0; at: 1 put: 0 "cleanup"! Item was changed: ----- Method: IA32ABIPlugin>>primInLibraryFindSymbol (in category 'primitives-library loading') ----- primInLibraryFindSymbol "Attempt to find the address of a symbol in a loaded library. The primitive can have a signature either of the form: <Anywhere> primInLibrary: libraryHandle <Alien> findSymbol: symbolName <String> ^<Integer> <primitive: 'primInLibraryFindSymbol' error: errorCode module: 'IA32ABI'> or: libraryHandle <Alien> primFindSymbol: symbolName <String> ^<Integer> <primitive: 'primInLibraryFindSymbol' error: errorCode module: 'IA32ABI'>" <export: true> | functionName libraryProxy address | <var: #address type: #'void *'> functionName := interpreterProxy stackValue: 0. libraryProxy := interpreterProxy stackValue: 1. ((self isAlien: libraryProxy) + and: [(interpreterProxy byteSizeOf: libraryProxy) >= (2 * interpreterProxy bytesPerOop) - and: [(interpreterProxy byteSizeOf: libraryProxy) >= 2 * BytesPerOop and: [interpreterProxy isBytes: functionName]]) ifFalse: [^interpreterProxy primitiveFailFor: PrimErrBadArgument]. address := interpreterProxy ioLoadSymbol: (self cCoerce: (interpreterProxy firstIndexableField: functionName) to: #sqInt) OfLength: (interpreterProxy byteSizeOf: functionName) + FromModule: (self longAt: libraryProxy + interpreterProxy baseHeaderSize + interpreterProxy bytesPerOop). - FromModule: (self longAt: libraryProxy + BaseHeaderSize + BytesPerOop). (interpreterProxy failed or: [address = 0]) ifTrue: [^interpreterProxy primitiveFailFor: PrimErrNotFound]. interpreterProxy methodReturnValue: (interpreterProxy positive32BitIntegerFor: address asUnsignedInteger)! Item was changed: ----- Method: NewsqueakIA32ABIPlugin>>primBoxedFree (in category 'primitives-memory management') ----- primBoxedFree "Free the memory referenced by the receiver, an Alien." "proxy <Alien> primFree ^<Alien> <primitive: 'primBoxedFree' error: errorCode module: 'IA32ABI'>" | addr rcvr ptr sizeField | <export: true> <var: #ptr type: 'sqInt *'> <var: #sizeField type: 'long'> rcvr := interpreterProxy stackObjectValue: 0. + (interpreterProxy byteSizeOf: rcvr) >= (2 * interpreterProxy bytesPerOop) ifFalse: - (interpreterProxy byteSizeOf: rcvr) >= 2 * BytesPerOop ifFalse: [^interpreterProxy primitiveFailFor: PrimErrBadReceiver]. ptr := interpreterProxy firstIndexableField: rcvr. sizeField := ptr at: 0. addr := ptr at: 1. "Don't you dare to free Squeak's memory!!" (sizeField >= 0 or: [addr = 0 or: [interpreterProxy isInMemory: addr]]) ifTrue: [^interpreterProxy primitiveFailFor: PrimErrInappropriate]. self cCode: 'free((void *)addr)' inSmalltalk: [self Cfree: addr]. ptr at: 0 put: 0; at: 1 put: 0 "cleanup"! Item was changed: ----- Method: NewsqueakIA32ABIPlugin>>primInLibraryFindSymbol (in category 'primitives-library loading') ----- primInLibraryFindSymbol "Attempt to find the address of a symbol in a loaded library. The primitive can have a signature either of the form: <Anywhere> primInLibrary: libraryHandle <Alien> findSymbol: symbolName <String> ^<Integer> <primitive: 'primInLibraryFindSymbol' error: errorCode module: 'IA32ABI'> or: libraryHandle <Alien> primFindSymbol: symbolName <String> ^<Integer> <primitive: 'primInLibraryFindSymbol' error: errorCode module: 'IA32ABI'>" <export: true> | functionName libraryProxy address | <var: #address type: #'void *'> functionName := interpreterProxy stackValue: 0. libraryProxy := interpreterProxy stackValue: 1. ((self isAlien: libraryProxy) + and: [(interpreterProxy byteSizeOf: libraryProxy) >= (2 * interpreterProxy bytesPerOop) - and: [(interpreterProxy byteSizeOf: libraryProxy) >= 2 * BytesPerOop and: [interpreterProxy isBytes: functionName]]) ifFalse: [^interpreterProxy primitiveFailFor: PrimErrBadArgument]. address := interpreterProxy ioLoadSymbol: (self cCoerce: (interpreterProxy firstIndexableField: functionName) to: #sqInt) OfLength: (interpreterProxy byteSizeOf: functionName) + FromModule: (self longAt: libraryProxy + interpreterProxy baseHeaderSize + interpreterProxy bytesPerOop). - FromModule: (self longAt: libraryProxy + BaseHeaderSize + BytesPerOop). (interpreterProxy failed or: [address = 0]) ifTrue: [^interpreterProxy primitiveFailFor: PrimErrNotFound]. interpreterProxy methodReturnValue: (interpreterProxy positive32BitIntegerFor: address asUnsignedInteger)! Item was changed: ----- Method: TSendNode>>emitCCodeAsFunctionCallOn:level:generator: (in category 'C code generation') ----- emitCCodeAsFunctionCallOn: aStream level: level generator: aCodeGen "Translate this message send into a C function call" "Special case for pluggable modules. Replace messages to interpreterProxy by interpreterProxy->message(..) if the message is not builtin" + (aCodeGen shouldGenerateAsInterpreterProxySend: self) ifTrue: - (aCodeGen messageReceiverIsInterpreterProxy: self) ifTrue: [(aCodeGen noteUsedPluginFunction: selector) ifTrue: [aStream nextPutAll: 'interpreterProxy->']]. "Translate this message send into a C function call." aStream nextPutAll: (aCodeGen cFunctionNameFor: selector); nextPut: $(. "Only include the receiver as the first argument in certain cases. The receiver is always included if it is an expression. If it is a variable: If the vmClass says it is an implicit variable, don't include it. If the variable is 'self' and the method being called is not in the method set (i.e. it is some external code), don't include it." (self shouldExcludeReceiverAsFirstArgument: aCodeGen) ifFalse: [(receiver structTargetKindIn: aCodeGen) == #struct ifTrue: [aStream nextPut: $&]. receiver emitCCodeOn: aStream level: level generator: aCodeGen. arguments isEmpty ifFalse: [aStream nextPutAll: ', ']]. arguments do: [ :arg| arg emitCCodeAsArgumentOn: aStream level: level generator: aCodeGen] separatedBy: [aStream nextPut: $,; space]. aStream nextPut: $)! Item was changed: ----- Method: VMBasicConstants class>>mostBasicConstantNames (in category 'accessing') ----- mostBasicConstantNames + "c.f. CCodeGenerator class>>#mostBasicConstantSelectors" ^#(BaseHeaderSize BytesPerWord BytesPerOop)!

1 0

Cog/image/build*.sh scripts broken due to changes in Squeak-4.5-All-in-One.zip
by Douglas McPherson 18 Oct '14

18 Oct '14

An extra level of nesting in Squeak-4.5-All-in-One.zip breaks these scripts. I believe the fix may be to change SQUEAK45APP=Squeak-4.5-All-in-One.app to SQUEAK45APP=Squeak-4.5-All-In-One/Squeak-4.5-All-in-One.app in envars.sh. Doug

2 1

New Spur trunk image available
by Eliot Miranda 18 Oct '14

18 Oct '14

Hi All, finally the Spur Squeak trunk image is updateable. The image in http://www.mirandabanda.org/files/Cog/SpurImages/2014-10-16/ was created today and thanks to Bert Freudenberg's latest Monticello work can be updated independently of the non-Spur trunk. Spur VMs are available in http://www.mirandabanda.org/files/Cog/VM/VM.r3105/ (and later as they appear). Without wanting to appear too overconfident the Spur system looks to be ready for use apart from image segments (which I hope to have working some time next month). I'm really interested in having this stress tested by as many people as possible. Spur really does offer a significant performance and functionality improvement over the current system, but it needs testing to ensure its reliability. Esteban Lorenzano is hard at work on the Pharo bootstrap for Spur so I hope Pharo 4 Spur will be available soon. As far as trunk goes, using Spur alongside non-Spur trunk is going to be difficult to manage for the near future. Right now, Spur modifies the Collections, Compiler, Kernel and System packages, and this is done by auto-editing the non-Spur versions of those packages, something I do periodically as new versions arrive. I also auto-edit trunk configurations (the part of the image update scheme that ensures packages are loaded in the right order when there are dependencies between packages) from non-Spur "update" to Spur "update.spur" forms. This at east means that Spur can keep up with trunk. But it does /not/ provide a way of committing to Collections.spur, Compiler.spur, Kernel.spur or System.spur without getting out of sync with non-Spur trunk. Note that apart from these packages, one /can/ safely commit any other package from a Spur image to trunk. Right now the plan is to release both V3 (the pre-Spur format) and Spur versions of Squeak 4.6 (I hope it'll be called Squeak 5.0). This isn't my preference. I'd like to see just Spur released, once reliability is verified. But I understand the safety and backward-compatibility concerns (Spur won't be able to load V3 image segments, and vice verse). The issue is of course that we have this tricky package situation to manage where, to keep the two systems in sync, modifications to Collections, Compiler, Kernel and System need to be committed from V3 and auto-edited to Spur. I think that's too clumsy to be practicable. Perhaps allowing the two systems to fork and doing a manual merge will be acceptable, but it'll be work to keep them in sync. -- best, Eliot

5 4

SqueakSSL + TLS SNI
by Levente Uzonyi 17 Oct '14

17 Oct '14

Hi, I've implemented support for TLS SNI[1] for SqueakSSL on unix. I've uploaded the modified source files[2][3], a diff[4], and a prebuilt module[5] (built on Ubuntu 14.04 from the Cog branch). The image side code is also available[6], along with an updated version of the WebClient[7] package, and intermediate packages with various improvements[8]. The image side code works even if the plugin doesn't support TLS SNI, but this version of WebClient won't work with older versions of the SqueakSSL-Core package. Please review the changes, and consider adding them to the corresponding repositories! Levente [1] https://en.wikipedia.org/wiki/Server_Name_Indication [2] http://leves.web.elte.hu/squeak/SqueakSSL/SqueakSSL.h [3] http://leves.web.elte.hu/squeak/SqueakSSL/sqUnixOpenSSL.c [4] http://leves.web.elte.hu/squeak/SqueakSSL/diff.txt [5] http://leves.web.elte.hu/squeak/SqueakSSL/SqueakSSL [6] http://leves.web.elte.hu/squeak/SqueakSSL/SqueakSSL-Core-ul.29.mcz [7] http://leves.web.elte.hu/squeak/SqueakSSL/WebClient-Core-ul.98.mcz [8] http://leves.web.elte.hu/squeak/SqueakSSL/

2 2

Fwd: Re: [Pharo-dev] OSProcess in 3.0
by phil＠highoctane.be 17 Oct '14

17 Oct '14

How to include aioplugin in pharovm? See messages below for the reason why. Phil ---------- Message transféré ---------- De : "David T. Lewis" <lewis(a)mail.msen.com> Date : 16 oct. 2014 01:30 Objet : Re: [Pharo-dev] OSProcess in 3.0 À : "Pharo Development List" <pharo-dev(a)lists.pharo.org> Cc : On Tue, Oct 14, 2014 at 09:35:44PM +0200, Thierry Goubier wrote: > > > Le 14/10/2014 14:15, David T. Lewis a ?crit : > >On Tue, Oct 14, 2014 at 07:19:10AM +0200, Thierry Goubier wrote: > >>Hi Dave, > >> > >>took me a while to do some testing. It seems there is an issue, but I > >>couldn't find out where. First, the data: > >> > >>Loading a package from a local gitfiletree repository (get from the > >>command a zipped git archive containing the package) : > >> > >>4.5.11, 4.6.8: 2132 msec. > >>4.5.12, 4.6.9: 50847 msec. > >> > >>I tried to rewrite the main command, remove the closePipes, etc... No > >>change in the runtime, so your right. > >> > >>Profiling doesn't help much: execution time is mostly idle time (but > >>with a significant increase on PipeableOSProcess commands: goes from > >>invisible to 2700 ms. A user break in the middle shows it delay waiting > >>on output of the external process). > >> > >>Only hint I could see is that it seems to be linked with the size of the > >>output of the command. > > > >Thierry, > > > >Aha! I am quite sure that you have located the problem. There must be > >something preventing the OS process from running to completion with > >a larger amount of output data. It definitely sounds like a bug in my > >latest update to Pipeable OSProcess. > > The strange thing is that it runs to completion (i.e. I got no errors; > if any data was missing or corrupted on output, my load would fail); but > a lot slower than it should be. > > >Thank you very much for finding this. I will get it fixed as quickly > >as I can. > > Thanks. I'm unable to help you much, I'm afraid :( Thierry, I do not yet have a solution to this, but I have been able to confirm that the performance difference that you see is primarily associated with the AioPlugin not being present in your VM. When I changed PipeableOSProcess to handle pipe handle closing properly, I used a buffered output stream that is driven by aio events. When data is available to be read from the external OS process, an aio notification pulls the available data into the buffered stream, and when no more data is available, the pipe (file) handles are closed. If the plugin is not present in the VM, I provided a polling mechanism to read data from the external OS process. Apparently this is very inefficient, and I am sure it could be greatly improved. That is the cause of the extremely slow performance that you are seeing. So in summary: The enhancement to PipeableOSProcess relies on an aio event driven reader, and if the AIO plugin is missing, the fallback code relies on polling, and is horribly inefficient. More to follow, and thank you again for identifying the problem. If you can convice your VM vendor to include AioPlugin in your VM, that would be helpful also ;-) Dave

3 3

usb 3.0 support on Linux
by Gustavo Duarte 17 Oct '14

17 Oct '14

Hey guys, I'm having troubles with enchanting application ( http://enchanting.robotclub.ab.ca/Enchanting+On+Linux), as you know based on squeak. In particular the problem is, running Enchanting on Ubuntu 12.04 and squeak-vm 4.10, the frontend isn't detect the presence of the Lego Brick when is connected through USB port. I guess that the problem is the type of USB port, because when use Enchanting on a PC with USB 2.0 with the same software environment, Ubuntu 12.04 + squeak-vm +Enchanting version, all work fine. However when i try on a PC with USB 3.0 the frontend isn't detecte the brick. Other additional information, Ubuntu 12.04 use for USB 2.0 ehci-pci driver module and for 3.0 use xhci_hcd. So my guess is, could be some incompatibility with xhci_hcd driver module. My question is, where I can start to find this issue, on squeak-vm or on enchanting image ? Where is handle the usb connection on squeak-vm or at image level ? Thanks in advance. Gustavo.

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VM Maker: Cog-eem.212.mcz
by commits＠source.squeak.org 17 Oct '14

17 Oct '14

Eliot Miranda uploaded a new version of Cog to project VM Maker: http://source.squeak.org/VMMaker/Cog-eem.212.mcz ==================== Summary ==================== Name: Cog-eem.212 Author: eem Time: 16 October 2014, 3:34:12.502 pm UUID: f7e9e4b4-2030-4fa7-ab37-91bc991a7b5a Ancestors: Cog-eem.211 Fix directory logic given FIles-eem.138 =============== Diff against Cog-eem.211 =============== Item was changed: ----- Method: SpurBootstrap>>bootstrapImageUsingFileDirectory: (in category 'public access') ----- bootstrapImageUsingFileDirectory: imageName | dirName baseName dir | dirName := FileDirectory dirPathFor: imageName. baseName := (imageName endsWith: '.image') ifTrue: [FileDirectory baseNameFor: imageName] ifFalse: [FileDirectory localNameFor: imageName]. + dir := dirName isEmpty ifTrue: [FileDirectory default] ifFalse: [FileDirectory default on: dirName]. - dir := dirName isEmpty ifTrue: [FileDirectory default] ifFalse: [FileDirectory on: dirName]. self on: (dir fullNameFor: baseName, '.image'). [self transform] on: Halt do: [:ex| "suppress halts from the usual suspects (development time halts)" (#(fullGC compactImage) includes: ex signalerContext sender selector) ifTrue: [ex resume] ifFalse: [ex pass]]. self writeSnapshot: (dir fullNameFor: baseName, '-spur.image') ofTransformedImage: newHeap headerFlags: oldInterpreter getImageHeaderFlags screenSize: oldInterpreter savedWindowSize. dir deleteFileNamed: baseName, '-spur.changes'; copyFileNamed: baseName, '.changes' toFileNamed: baseName, '-spur.changes'!

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Vm-dev October 2014