3 - OOP - VisualWorks (b)
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The document discusses the runtime architecture of Smalltalk. It notes that the runtime consists of a virtual machine, image, and sources. The image contains bytecodes that are translated to native code by a just-in-time compiler at runtime. Sources and changes are not needed for execution and are typically removed for deployment. An application can be delivered as bytecode files to be executed by the virtual machine.
3 - OOP - VisualWorks (b)
- 1. S.Ducasse 1 QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture. Stéphane Ducasse Stephane.Ducasse@univ-savoie.fr http://www.listic.univ-savoie.fr/~ducasse/ The VisualWorks Environment
- 2. S.Ducasse 2 License: CC-Attribution-ShareAlike 2.0 http://creativecommons.org/licenses/by-sa/2.0/
- 3. S.Ducasse 3 Smalltalk Run-Time Architecture • Virtual Machine + Image + Changes and Sources • Image = bytecodes • Sources and changes = code (text) A bytethe vir IMAGE2IMAGE2StandShar IMAGE1.IMAGE1. All the objeat a momen One per us +
- 4. S.Ducasse 4 Runtime Architecture • The byte-code is in fact translated into native code by a just-in-time compiler. • The source and the changes are not necessary for interpreting the byte-code, this is just for the development. Normally they are removed for deployment. • An application can be delivered as some byte-code files that will be executed with aVM.The development image is stripped to remove the unnecessary development components.
- 5. S.Ducasse 5 Mouse Semantics SelectOperatWinRed BlueYellow
- 7. S.Ducasse 7 Browsing a class
- 9. S.Ducasse 9 Inspector • To look inside objects • anObject inspect
- 11. S.Ducasse 11 ChangeList To recover from power failure!!
- 14. S.Ducasse 14 Workspace: to edit code snippet
- 15. S.Ducasse 15 Integrated version management Check in / out Back end postgres/oracle Based on packages and bundles no scope only deployment/source management concepts Store
- 18. S.Ducasse 18 Change your Mind • Everything you do is recorded !! • So try and learn how to recover your code • You are smart so – experiment, – learn for you, browse, – all the code is there