Should i put more elaborate error message? A 'function unavailable' is exception which you get when... function is not available. I just thinking how to prevent receiving a huge and worthless stack traces. :) One way is of course write documentation.. :) On 25 May 2012 12:39, Serge Stinckwich <serge.stinckwich@gmail.com> wrote:

On Fri, May 25, 2012 at 4:57 PM, Tudor Girba <tudor@tudorgirba.com> wrote:

...

Hi,

Here is how to install Athens (I also added this comment to the ConfigurationOfAthens):

1. Install Cairo on your machine For example, for Mac, you open the terminal and run: sudo port install -f cairo +universal

More information can be found here: http://cairographics.org/download/

2. Download the NativeBoost enabled Cog VM from: https://ci.lille.inria.fr/pharo/view/NativeBoost/

3. Get a Pharo image and run: Gofer new        squeaksource: 'Athens';        package: 'ConfigurationOfAthens';        load. (Smalltalk at: #ConfigurationOfAthens) loadDevelopment

4. Play with it. For example: VGTigerDemo runDemo

I install Cairo with brew on mac os x: brew install cairo

And I got the following stack trace:

25 May 2012 5:37:03 pm

VM: Mac OS - intel - 1074 - NBCoInterpreter NativeBoost-CogPlugin-IgorStasenko.9 uuid: 801decd2-0b42-fa49-bcea-d7564d516a1b May  1 2012, StackToRegisterMappingCogit VMMaker-oscog-EstebanLorenzano.158 uuid: 82eded98-68af-4c80-a472-4f6de293adcf May  1 2012, https://git.gitorious.org/cogvm/blessed.git Commit: 6aa3fd0f1188078d3167dec1a53031a61b97b688 Date: Tue May 1 20:28:14 2012 +0200 By: Esteban Lorenzano <estebanlm@gmail.com> Image: Pharo1.4a [Latest update: #14418]

NBFFICallout(Object)>>error:        Receiver: a NBFFICallout        Arguments and temporary variables:                aString:        'function unavailable'        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

[:gen | fnAddress := requestor nbGetSymbolAddress: fnSpec functionName module: aModuleNameOrHandle.        fnAddress                ifNil: [self error: 'function unavailable'].        self mayCallback                ifTrue: [asm push: fnAddress asUImm32;                                 mov: NativeBoost callgateFunctionAddress asUImm32 to: EAX;                                 call: EAX]                ifFalse: [asm mov: fnAddress asUImm32 to: EAX;                                 call: EAX]] in NBFFICallout>>generateCall:module:        Receiver: a NBFFICallout        Arguments and temporary variables:                aModuleNameOrHandle:    a NBFFICallout                fnAddress:      '/opt/local/lib/libcairo.2.dylib'                gen:    #(nil)        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

BlockClosure>>valueWithPossibleArgs:        Receiver: [:gen | fnAddress := requestor nbGetSymbolAddress: fnSpec functionName module: aModuleNam...etc...        Arguments and temporary variables:                anArray:        an Array(a NBFFICallout a NBInterpreterProxy an AJx86Assembler)        Receiver's instance variables:                outerContext:   NBFFICallout>>generateCall:module:                startpc:        91                numArgs:        1

[aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.        (self optEmitCall                        or: [self optNoCleanup])                ifTrue: [call disableCleanup]] in [:call | self optNoAlignment                ifTrue: [call alignment: 1].        self pushArguments.        coercionMayFail                ifTrue: [proxy ifFailedJumpTo: self failedLabel].        asm                decorateWith: 'FFI: performing a call'                while: [aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.                        (self optEmitCall                                        or: [self optNoCleanup])                                ifTrue: [call disableCleanup]]] in NBFFICallout>>generateInstructions:        Receiver: a NBFFICallout        Arguments and temporary variables:                aFunctionBodyBlock:     an AJCdeclCallInfo                call:   [:gen | fnAddress := requestor nbGetSymbolAddress: fnSpec functionName m...etc...        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

BlockClosure>>ensure:        Receiver: [aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.        (self optEmitCall                        or: [...etc...        Arguments and temporary variables:                aBlock:         [level := level - 1.        self                addInstruction: (AJInstructionDecoration n...etc...                complete:       nil                returnValue:    nil        Receiver's instance variables:                outerContext:   [:call | self optNoAlignment                ifTrue: [call alignment: 1].        sel...etc...                startpc:        151                numArgs:        0

AJx86Assembler>>decorateWith:while:        Receiver: an AJx86Assembler        Arguments and temporary variables:                annotation:     'FFI: performing a call'                aBlock:         [aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.        (self o...etc...        Receiver's instance variables:                instructions:   <<error during printing>>

[:call | self optNoAlignment                ifTrue: [call alignment: 1].        self pushArguments.        coercionMayFail                ifTrue: [proxy ifFailedJumpTo: self failedLabel].        asm                decorateWith: 'FFI: performing a call'                while: [aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.                        (self optEmitCall                                        or: [self optNoCleanup])                                ifTrue: [call disableCleanup]]] in NBFFICallout>>generateInstructions:        Receiver: a NBFFICallout        Arguments and temporary variables:                aFunctionBodyBlock:     an AJCdeclCallInfo                call:   [:gen | fnAddress := requestor nbGetSymbolAddress: fnSpec functionName m...etc...        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

AJx86Assembler>>performingCall:in:        Receiver: an AJx86Assembler        Arguments and temporary variables:                ci:     an AJCdeclCallInfo                aBlock:         [:call | self optNoAlignment                ifTrue: [call alignment: 1].        self push...etc...        Receiver's instance variables:                instructions:   <<error during printing>>

NBFFICallout>>foreignCall:        Receiver: a NBFFICallout        Arguments and temporary variables:                aBlock:         [:call | self optNoAlignment                ifTrue: [call alignment: 1].        self push...etc...        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

NBFFICallout>>generateInstructions:        Receiver: a NBFFICallout        Arguments and temporary variables:                aFunctionBodyBlock:     [:gen | fnAddress := requestor nbGetSymbolAddress: fnSpec ...etc...                instructions:   nil        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

NBFFICallout>>generate:        Receiver: a NBFFICallout        Arguments and temporary variables:                aFunctionBodyBlock:     [:gen | fnAddress := requestor nbGetSymbolAddress: fnSpec ...etc...                generatedCode:  nil        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

NBFFICallout>>generateCall:module:        Receiver: a NBFFICallout        Arguments and temporary variables:                functionSpec:   #(#AthensCairoSurface #cairo_image_surface_create #(#int #aFormat...etc...                aModuleNameOrHandle:    '/opt/local/lib/libcairo.2.dylib'                fnAddress:      #(nil)        Receiver's instance variables:                asm:    an AJx86Assembler                proxy:  a NBInterpreterProxy                options:        a Set(#optCdecl #optAllowByteArraysPtr #optUseStackPointer #optReturnP...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                fnSpec:         a NBFnSpec                requestor:      AthensCairoSurface class                methodArgs:     an OrderedCollection('aFormat' 'aWidth' 'aHeight')                coercionMayFail:        true                callInfo:       an AJCdeclCallInfo

[:gen | gen sender: sender;                 callType: self nbCallingConvention;                 generateCall: fnSpec module: self nbLibraryNameOrHandle] in AthensCairoSurface class(Object)>>nbCall:        Receiver: AthensCairoSurface        Arguments and temporary variables:                fnSpec:         a NBFFICallout                sender:         #(#AthensCairoSurface #cairo_image_surface_create #(#int #aFormat #, #i...etc...                gen:    AthensCairoSurface class>>primImage:width:height:        Receiver's instance variables:                superclass:     AthensSurface                methodDict:     a MethodDictionary(#asAthensPaintOn:->(AthensCairoSurface>>#asAthen...etc...                format:         140                instanceVariables:      #('handle' 'context' 'builder' 'id')                organization:   ('converting' asAthensPaintOn: writeToPng:) ('as yet unclassified...etc...                subclasses:     {AthensCairoPDFSurface}                name:   #AthensCairoSurface                classPool:      nil                sharedPools:    an OrderedCollection(AthensCairoDefs)                environment:    a SystemDictionary(lots of globals)                category:       #'Athens-Cairo'                traitComposition:       TCairoLibrary                localSelectors:         a Set(#asForm #createFormPaint: #stride #setOperator: #writeToP...etc...                uniqueSession:  nil                dispatch:       nil                dispatchStruct:         nil

NBFFICallout class(NBNativeCodeGen class)>>generateCode:andRetry:        Receiver: NBFFICallout        Arguments and temporary variables:                aBlock:         [:gen | gen sender: sender;                 callType: self nbCallingConvention;                 g...etc...                retryCtx:       AthensCairoSurface class>>primImage:width:height:                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                code:   nil                newMethod:      nil                args:   nil                i:      nil                iLimiT:         nil        Receiver's instance variables:                superclass:     NBNativeCodeGen                methodDict:     a MethodDictionary(#aliasForType:->(NBFFICallout>>#aliasForType: "a...etc...                format:         148                instanceVariables:      #('fnSpec' 'requestor' 'methodArgs' 'coercionMayFail' 'callI...etc...                organization:   ('type aliases' aliasForType:) ('accessing' anonSpec: callType: c...etc...                subclasses:     {NBNativeFunctionGen}                name:   #NBFFICallout                classPool:      a Dictionary(#CustomErrorCodes->nil #CustomErrorMessages->nil #TypeA...etc...                sharedPools:    nil                environment:    a SystemDictionary(lots of globals)                category:       #'NativeBoost-Core'                traitComposition:       {}                localSelectors:         nil

NBFFICallout class(NBNativeCodeGen class)>>handleFailureIn:nativeCode:        Receiver: NBFFICallout        Arguments and temporary variables:                aContext:       AthensCairoSurface class>>primImage:width:height:                aBlock:         [:gen | gen sender: sender;                 callType: self nbCallingConvention;                 g...etc...                method:         (AthensCairoSurface class>>#primImage:width:height: "a CompiledMethod(4...etc...                lastError:      502        Receiver's instance variables:                superclass:     NBNativeCodeGen                methodDict:     a MethodDictionary(#aliasForType:->(NBFFICallout>>#aliasForType: "a...etc...                format:         148                instanceVariables:      #('fnSpec' 'requestor' 'methodArgs' 'coercionMayFail' 'callI...etc...                organization:   ('type aliases' aliasForType:) ('accessing' anonSpec: callType: c...etc...                subclasses:     {NBNativeFunctionGen}                name:   #NBFFICallout                classPool:      a Dictionary(#CustomErrorCodes->nil #CustomErrorMessages->nil #TypeA...etc...                sharedPools:    nil                environment:    a SystemDictionary(lots of globals)                category:       #'NativeBoost-Core'                traitComposition:       {}                localSelectors:         nil

AthensCairoSurface class(Object)>>nbCall:        Receiver: AthensCairoSurface        Arguments and temporary variables:                fnSpec:         #(#AthensCairoSurface #cairo_image_surface_create #(#int #aFormat #, #i...etc...                sender:         AthensCairoSurface class>>primImage:width:height:        Receiver's instance variables:                superclass:     AthensSurface                methodDict:     a MethodDictionary(#asAthensPaintOn:->(AthensCairoSurface>>#asAthen...etc...                format:         140                instanceVariables:      #('handle' 'context' 'builder' 'id')                organization:   ('converting' asAthensPaintOn: writeToPng:) ('as yet unclassified...etc...                subclasses:     {AthensCairoPDFSurface}                name:   #AthensCairoSurface                classPool:      nil                sharedPools:    an OrderedCollection(AthensCairoDefs)                environment:    a SystemDictionary(lots of globals)                category:       #'Athens-Cairo'                traitComposition:       TCairoLibrary                localSelectors:         a Set(#asForm #createFormPaint: #stride #setOperator: #writeToP...etc...                uniqueSession:  nil                dispatch:       nil                dispatchStruct:         nil

AthensCairoSurface class>>primImage:width:height:        Receiver: AthensCairoSurface        Arguments and temporary variables:                aFormat:        0                aWidth:         800                aHeight:        800        Receiver's instance variables:                superclass:     AthensSurface                methodDict:     a MethodDictionary(#asAthensPaintOn:->(AthensCairoSurface>>#asAthen...etc...                format:         140                instanceVariables:      #('handle' 'context' 'builder' 'id')                organization:   ('converting' asAthensPaintOn: writeToPng:) ('as yet unclassified...etc...                subclasses:     {AthensCairoPDFSurface}                name:   #AthensCairoSurface                classPool:      nil                sharedPools:    an OrderedCollection(AthensCairoDefs)                environment:    a SystemDictionary(lots of globals)                category:       #'Athens-Cairo'                traitComposition:       TCairoLibrary                localSelectors:         a Set(#asForm #createFormPaint: #stride #setOperator: #writeToP...etc...                uniqueSession:  nil                dispatch:       nil                dispatchStruct:         nil

AthensCairoSurface class>>extent:format:        Receiver: AthensCairoSurface        Arguments and temporary variables:                anExtent:       (800@800)                aFormat:        0        Receiver's instance variables:                superclass:     AthensSurface                methodDict:     a MethodDictionary(#asAthensPaintOn:->(AthensCairoSurface>>#asAthen...etc...                format:         140                instanceVariables:      #('handle' 'context' 'builder' 'id')                organization:   ('converting' asAthensPaintOn: writeToPng:) ('as yet unclassified...etc...                subclasses:     {AthensCairoPDFSurface}                name:   #AthensCairoSurface                classPool:      nil                sharedPools:    an OrderedCollection(AthensCairoDefs)                environment:    a SystemDictionary(lots of globals)                category:       #'Athens-Cairo'                traitComposition:       TCairoLibrary                localSelectors:         a Set(#asForm #createFormPaint: #stride #setOperator: #writeToP...etc...                uniqueSession:  nil                dispatch:       nil                dispatchStruct:         nil

AthensCairoSurface class>>extent:        Receiver: AthensCairoSurface        Arguments and temporary variables:                anExtent:       (800@800)        Receiver's instance variables:                superclass:     AthensSurface                methodDict:     a MethodDictionary(#asAthensPaintOn:->(AthensCairoSurface>>#asAthen...etc...                format:         140                instanceVariables:      #('handle' 'context' 'builder' 'id')                organization:   ('converting' asAthensPaintOn: writeToPng:) ('as yet unclassified...etc...                subclasses:     {AthensCairoPDFSurface}                name:   #AthensCairoSurface                classPool:      nil                sharedPools:    an OrderedCollection(AthensCairoDefs)                environment:    a SystemDictionary(lots of globals)                category:       #'Athens-Cairo'                traitComposition:       TCairoLibrary                localSelectors:         a Set(#asForm #createFormPaint: #stride #setOperator: #writeToP...etc...                uniqueSession:  nil                dispatch:       nil                dispatchStruct:         nil

VGTigerDemo>>initialize        Receiver: a VGTigerDemo        Arguments and temporary variables:

       Receiver's instance variables:                surface:        nil

VGTigerDemo class(Behavior)>>new        Receiver: VGTigerDemo        Arguments and temporary variables:

       Receiver's instance variables:                superclass:     Object                methodDict:     a MethodDictionary(#convertPathData2->(VGTigerDemo>>#convertPathDat...etc...                format:         132                instanceVariables:      #('surface')                organization:   ('as yet unclassified' convertPathData2 initialize runDemo)

               subclasses:     nil                name:   #VGTigerDemo                classPool:      nil                sharedPools:    nil                environment:    a SystemDictionary(lots of globals)                category:       #'Athens-Examples'                traitComposition:       {}                localSelectors:         nil

VGTigerDemo class>>runDemo        Receiver: VGTigerDemo        Arguments and temporary variables:

       Receiver's instance variables:                superclass:     Object                methodDict:     a MethodDictionary(#convertPathData2->(VGTigerDemo>>#convertPathDat...etc...                format:         132                instanceVariables:      #('surface')                organization:   ('as yet unclassified' convertPathData2 initialize runDemo)

               subclasses:     nil                name:   #VGTigerDemo                classPool:      nil                sharedPools:    nil                environment:    a SystemDictionary(lots of globals)                category:       #'Athens-Examples'                traitComposition:       {}                localSelectors:         nil

UndefinedObject>>DoIt        Receiver: nil        Arguments and temporary variables:

       Receiver's instance variables: nil

Compiler>>evaluate:in:to:notifying:ifFail:logged:        Receiver: a Compiler        Arguments and temporary variables:                textOrStream:   a ReadWriteStream                aContext:       nil                receiver:       nil                aRequestor:     a TextMorphForEditView(741605376)                failBlock:      [self morph flash.        ^ nil]                logFlag:        true                methodNode:     DoIt        ^ VGTigerDemo runDemo                method:         (UndefinedObject>>#DoIt "a CompiledMethod(926679040)")                value:  nil                toLog:  nil                itsSelection:   nil                itsSelectionString:     nil        Receiver's instance variables:                sourceStream:   a ReadWriteStream                requestor:      a TextMorphForEditView(741605376)                class:  UndefinedObject                category:       nil                context:        nil                parser:         a Parser

[rcvr class evaluatorClass new                evaluate: self selectionForDoitAsStream                in: ctxt                to: rcvr                notifying: self morph                ifFail: [self morph flash.                        ^ nil]                logged: true] in SmalltalkEditor>>evaluateSelectionAndDo:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                rcvr:   nil                ctxt:   nil        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

BlockClosure>>on:do:        Receiver: [rcvr class evaluatorClass new                evaluate: self selectionForDoitAsStream                in: ctxt                to: ...etc...        Arguments and temporary variables:                exception:      OutOfScopeNotification                handlerAction:  [:ex | ex resume: true]                handlerActive:  true        Receiver's instance variables:                outerContext:   SmalltalkEditor>>evaluateSelectionAndDo:                startpc:        110                numArgs:        0

SmalltalkEditor>>evaluateSelectionAndDo:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aBlock:         [:result | result]                result:         nil                rcvr:   nil                ctxt:   nil        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor>>evaluateSelection        Receiver: a SmalltalkEditor        Arguments and temporary variables:

       Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor>>doIt        Receiver: a SmalltalkEditor        Arguments and temporary variables:

       Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor>>doIt:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aKeyboardEvent:         [keystroke '<Cmd-d>']        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor(TextEditor)>>performCmdActionsWith:shifted:return:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aKeyboardEvent:         [keystroke '<Cmd-d>']                aBoolean:       false                return:         [:val | ^ val]                asciiValue:     101                actions:        #(#noop: #cursorHome: #noop: #noop: #cursorEnd: #noop: #noop: #noop: #...etc...                action:         #doIt:        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor(TextEditor)>>dispatchCommandOn:return:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aKeyboardEvent:         [keystroke '<Cmd-d>']                return:         [:val | ^ val]                asciiValue:     100                honorCommandKeys:       true                char:   nil        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor(TextEditor)>>dispatchOn:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aKeyboardEvent:         [keystroke '<Cmd-d>']                char:   nil                return:         [:val | ^ val]                keyEvents:      nil        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

[self dispatchOn: aKeyboardEvent] in SmalltalkEditor(TextEditor)>>keystroke:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aKeyboardEvent:         [keystroke '<Cmd-d>']        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor(TextEditor)>>handleKeystrokeAction:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aBlock:         [self dispatchOn: aKeyboardEvent]        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor(TextEditor)>>handleEditionAction:fromKeyboardEvent:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                anAction:       [self dispatchOn: aKeyboardEvent]                aKeyboardEvent:         [keystroke '<Cmd-d>']        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

SmalltalkEditor(TextEditor)>>keystroke:        Receiver: a SmalltalkEditor        Arguments and temporary variables:                aKeyboardEvent:         [keystroke '<Cmd-d>']        Receiver's instance variables:                morph:  a TextMorphForEditView(741605376)                selectionShowing:       true                model:  a Workspace                editingState:   a SmalltalkEditingState

[editor keystroke: evt] in [| action | evt keyValue = 13                ifTrue: [action := self crAction.                        action                                ifNotNil: [evt hand newKeyboardFocus: nil.                                        ^ action value]].        self                handleInteraction: [editor keystroke: evt].        self updateFromParagraph.        super keyStroke: evt] in TextMorphForEditView(TextMorph)>>keyStroke:        Receiver: a TextMorphForEditView(741605376)        Arguments and temporary variables:                evt:    [keystroke '<Cmd-d>']        Receiver's instance variables:                bounds:         (0@0) corner: (473@18)                owner:  a TransformMorph(38535168)                submorphs:      #()                fullBounds:     (0@0) corner: (473@18)                color:  Color black                extension:      a MorphExtension (824180736) [other:  (blinkStart -> 1085881) (myDep...etc...                borderWidth:    0                borderColor:    Color black                textStyle:      a TextStyle Bitmap DejaVu Sans 9                text:   a Text for 'VGTigerDemo runDemo'                wrapFlag:       true                paragraph:      a Paragraph                editor:         a SmalltalkEditor                container:      nil                predecessor:    nil                successor:      nil                backgroundColor:        nil                margins:        (0@0) corner: (0@0)                editView:       a PluggableTextMorph(838860800)                acceptOnCR:     false                autoAccept:     false                acceptOnFocusChange:    false                selectionColor:         nil

TextMorphForEditView(TextMorph)>>handleInteraction:        Receiver: a TextMorphForEditView(741605376)        Arguments and temporary variables:                interactionBlock:       [editor keystroke: evt]                oldEditor:      a SmalltalkEditor                oldParagraph:   a Paragraph                oldText:        a Text for 'VGTigerDemo runDemo'        Receiver's instance variables:                bounds:         (0@0) corner: (473@18)                owner:  a TransformMorph(38535168)                submorphs:      #()                fullBounds:     (0@0) corner: (473@18)                color:  Color black                extension:      a MorphExtension (824180736) [other:  (blinkStart -> 1085881) (myDep...etc...                borderWidth:    0                borderColor:    Color black                textStyle:      a TextStyle Bitmap DejaVu Sans 9                text:   a Text for 'VGTigerDemo runDemo'                wrapFlag:       true                paragraph:      a Paragraph                editor:         a SmalltalkEditor                container:      nil                predecessor:    nil                successor:      nil                backgroundColor:        nil                margins:        (0@0) corner: (0@0)                editView:       a PluggableTextMorph(838860800)                acceptOnCR:     false                autoAccept:     false                acceptOnFocusChange:    false                selectionColor:         nil

--- The full stack --- NBFFICallout(Object)>>error: [:gen | fnAddress := requestor nbGetSymbolAddress: fnSpec functionName module: aModuleNameOrHandle.        fnAddress                ifNil: [self error: 'function unavailable'].        self mayCallback                ifTrue: [asm push: fnAddress asUImm32;                                 mov: NativeBoost callgateFunctionAddress asUImm32 to: EAX;                                 call: EAX]                ifFalse: [asm mov: fnAddress asUImm32 to: EAX;                                 call: EAX]] in NBFFICallout>>generateCall:module: BlockClosure>>valueWithPossibleArgs: [aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.        (self optEmitCall                        or: [self optNoCleanup])                ifTrue: [call disableCleanup]] in [:call | self optNoAlignment                ifTrue: [call alignment: 1].        self pushArguments.        coercionMayFail                ifTrue: [proxy ifFailedJumpTo: self failedLabel].        asm                decorateWith: 'FFI: performing a call'                while: [aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.                        (self optEmitCall                                        or: [self optNoCleanup])                                ifTrue: [call disableCleanup]]] in NBFFICallout>>generateInstructions: BlockClosure>>ensure: AJx86Assembler>>decorateWith:while: [:call | self optNoAlignment                ifTrue: [call alignment: 1].        self pushArguments.        coercionMayFail                ifTrue: [proxy ifFailedJumpTo: self failedLabel].        asm                decorateWith: 'FFI: performing a call'                while: [aFunctionBodyBlock valueWithPossibleArgs: {self. proxy. asm}.                        (self optEmitCall                                        or: [self optNoCleanup])                                ifTrue: [call disableCleanup]]] in NBFFICallout>>generateInstructions: AJx86Assembler>>performingCall:in: NBFFICallout>>foreignCall: NBFFICallout>>generateInstructions: NBFFICallout>>generate: NBFFICallout>>generateCall:module: [:gen | gen sender: sender;                 callType: self nbCallingConvention;                 generateCall: fnSpec module: self nbLibraryNameOrHandle] in AthensCairoSurface class(Object)>>nbCall: NBFFICallout class(NBNativeCodeGen class)>>generateCode:andRetry: NBFFICallout class(NBNativeCodeGen class)>>handleFailureIn:nativeCode: AthensCairoSurface class(Object)>>nbCall: AthensCairoSurface class>>primImage:width:height: AthensCairoSurface class>>extent:format: AthensCairoSurface class>>extent: VGTigerDemo>>initialize VGTigerDemo class(Behavior)>>new VGTigerDemo class>>runDemo UndefinedObject>>DoIt Compiler>>evaluate:in:to:notifying:ifFail:logged: [rcvr class evaluatorClass new                evaluate: self selectionForDoitAsStream                in: ctxt                to: rcvr                notifying: self morph                ifFail: [self morph flash.                        ^ nil]                logged: true] in SmalltalkEditor>>evaluateSelectionAndDo: BlockClosure>>on:do: SmalltalkEditor>>evaluateSelectionAndDo: SmalltalkEditor>>evaluateSelection SmalltalkEditor>>doIt SmalltalkEditor>>doIt: SmalltalkEditor(TextEditor)>>performCmdActionsWith:shifted:return: SmalltalkEditor(TextEditor)>>dispatchCommandOn:return: SmalltalkEditor(TextEditor)>>dispatchOn: [self dispatchOn: aKeyboardEvent] in SmalltalkEditor(TextEditor)>>keystroke: SmalltalkEditor(TextEditor)>>handleKeystrokeAction: SmalltalkEditor(TextEditor)>>handleEditionAction:fromKeyboardEvent: SmalltalkEditor(TextEditor)>>keystroke: [editor keystroke: evt] in [| action | evt keyValue = 13                ifTrue: [action := self crAction.                        action                                ifNotNil: [evt hand newKeyboardFocus: nil.                                        ^ action value]].        self                handleInteraction: [editor keystroke: evt].        self updateFromParagraph.        super keyStroke: evt] in TextMorphForEditView(TextMorph)>>keyStroke: TextMorphForEditView(TextMorph)>>handleInteraction:  - - - - - - - - - - - - - - -                        - - - - - - - - - - - - - - - - - - TextMorphForEditView>>handleInteraction: [| action | evt keyValue = 13                ifTrue: [action := self crAction.                        action                                ifNotNil: [evt hand newKeyboardFocus: nil.                                        ^ action value]].        self                handleInteraction: [editor keystroke: evt].        self updateFromParagraph.        super keyStroke: evt] in TextMorphForEditView(TextMorph)>>keyStroke: ECToolSet class>>codeCompletionAround:textMorph:keyStroke: ToolRegistry>>codeCompletionAround:textMorph:keyStroke: SmalltalkEditor>>codeCompletionAround:textMorph:keyStroke: TextMorphForEditView(TextMorph)>>keyStroke: TextMorphForEditView>>keyStroke: TextMorphForEditView(TextMorph)>>handleKeystroke: KeyboardEvent>>sentTo: TextMorphForEditView(Morph)>>handleEvent: TextMorphForEditView(Morph)>>handleFocusEvent: [ActiveHand := self.        ActiveEvent := anEvent.        result := focusHolder                                handleFocusEvent: (anEvent                                                transformedBy: (focusHolder transformedFrom: self))] in HandMorph>>sendFocusEvent:to:clear: [aBlock value] in PasteUpMorph>>becomeActiveDuring: BlockClosure>>on:do: PasteUpMorph>>becomeActiveDuring: HandMorph>>sendFocusEvent:to:clear: HandMorph>>sendEvent:focus:clear: HandMorph>>sendKeyboardEvent: HandMorph>>handleEvent: HandMorph>>processEvents [:h | ActiveHand := h.        h processEvents.        ActiveHand := nil] in WorldState>>doOneCycleNowFor: Array(SequenceableCollection)>>do: WorldState>>handsDo: WorldState>>doOneCycleNowFor: WorldState>>doOneCycleFor: PasteUpMorph>>doOneCycle [[World doOneCycle.        Processor yield.        false] whileFalse.        nil] in MorphicUIManager>>spawnNewProcess [self value.        Processor terminateActive] in BlockClosure>>newProcess

-- Serge Stinckwich UMI UMMISCO 209 (IRD/UPMC), Hanoi, Vietnam Every DSL ends up being Smalltalk http://doesnotunderstand.org/

-- Best regards, Igor Stasenko.

On 25 May 2012 18:51, Serge Stinckwich <serge.stinckwich@gmail.com> wrote:

Envoyé de mon iPhone

Le 25 mai 2012 à 20:23, Igor Stasenko <siguctua@gmail.com> a écrit :

...

Should i put more elaborate error message? A 'function unavailable' is exception which you get when... function is not available.

I just thinking how to prevent receiving a huge and worthless stack traces. :) One way is of course write documentation.. :)

Ahah, so maybe I will send more useless stack traces ;-)

No, but frankly, please tell me what was unclear to you, and why you thought that sending a trace will be helpful to resolve the problem. Because this is not a bug, and behavior is correct, so what that trace serves for? -- Best regards, Igor Stasenko.