Vm-dev June 2010

vm-dev@lists.squeakfoundation.org

42 participants
52 discussions

Large files (>4G) under linux
by Hans-Martin Mosner 06 Jun '10

06 Jun '10

Hello, in an effort to play with large (video) files I now build a VM which is capable of handling such files. There are basically 2 small changes: - add the option --CFLAGS="-D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -g -O2 -fomit-frame-pointer" to the cmake call in .../unix/Makefile - use fseeko and ftello in sqFilePluginBasicPrims.c The first just adds the two defines to the C compiler options in addition to options which were default anyway. However, I'm feeling somewhat uneasy about the second change. There's a comment by Tim Rowledge in the file which states that he removed ftello and fseeko in 2002 to make the file ansi-compliant. The linux man page for these function states that they are in POSIX.1-2001, which should be old enough to depend on these functions in any posix environment. So what do you think about it? I definitely want the VM to be able to handle large files. Cheers, Hans-Martin

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VM Maker: VMMaker-dtl.179.mcz
by squeak-dev-noreply＠lists.squeakfoundation.org 05 Jun '10

05 Jun '10

Dave Lewis uploaded a new version of VMMaker to project VM Maker: http://www.squeaksource.com/VMMaker/VMMaker-dtl.179.mcz ==================== Summary ==================== Name: VMMaker-dtl.179 Author: dtl Time: 5 June 2010, 2:37:39 am UUID: f0fae3c6-e4df-43b1-bfa7-4d30370d7d95 Ancestors: VMMaker-dtl.178 VMMaker 4.2.4 Fix an obscure bug in the slang inliner, in which type declarations from an inlined method were incorrectly applied to a variable in the sender two levels up. Reference Mantis 7543, which includes a change set to illustrate the problem. =============== Diff against VMMaker-dtl.178 =============== Item was changed: ----- Method: VMMaker>>generateInterpreterFile (in category 'generate sources') ----- generateInterpreterFile "Translate the Smalltalk description of the virtual machine into C. If 'self doInlining' is true, small method bodies are inlined to reduce procedure call overhead. On the PPC, this results in a factor of three speedup with only 30% increase in code size. Subclasses can use specialised versions of CCodeGenerator and interpreterClass." + | cg cls | - | cg | self needsToRegenerateInterpreterFile ifFalse: [^nil]. self interpreterClass initialize. ObjectMemory initializeConstants. + cg := self createCodeGenerator. + cls := self interpreterClass. + [cls == Object] + whileFalse: + [cg addClass: cls. + cls := cls superclass]. - cg := self createCodeGenerator - addClass: self interpreterClass; - addClass: ObjectMemory. - (Smalltalk classNamed: #MemoryAccess) ifNotNilDo: [:ma | - ma isEnabled ifTrue: [cg addClass: ma]]. cg storeHeaderOnFile: self interpreterHeaderPath. cg storeCodeOnFile: self interpreterFilePath doInlining: self doInlining! Item was changed: ----- Method: TMethod>>inlineFunctionCall:in: (in category 'inlining') ----- inlineFunctionCall: aSendNode in: aCodeGen "Answer the body of the called function, substituting the actual parameters for the formal argument variables in the method body." "Assume caller has established that: 1. the method arguments are all substitutable nodes, and 2. the method to be inlined contains no additional embedded returns." | sel meth substitutionDict | sel := aSendNode selector. meth := (aCodeGen methodNamed: sel) copy. meth renameVarsForInliningInto: self in: aCodeGen. meth renameLabelsForInliningInto: self. self addVarsDeclarationsAndLabelsOf: meth. substitutionDict := Dictionary new: 100. meth args with: aSendNode args do: [ :argName :exprNode | substitutionDict at: argName put: exprNode. + locals remove: argName. + declarations removeKey: argName ifAbsent: []]. - locals remove: argName]. meth parseTree bindVariablesIn: substitutionDict. ^ meth statements first expression! Item was changed: ----- Method: VMMaker class>>versionString (in category 'version testing') ----- versionString "VMMaker versionString" + ^'4.2.4'! - ^'4.2.3'!

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Vm-dev June 2010