[Vm-dev] informations about pharo'VM

Ben Coman btc at openinworld.com
Tue Apr 4 01:30:37 UTC 2017


On Tue, Apr 4, 2017 at 5:59 AM, Paul DeBruicker <pdebruic at gmail.com> wrote:

>
> The blue book
> http://stephane.ducasse.free.fr/FreeBooks/BlueBook/Bluebook.pdf
>
>
> and all the info on this blog should get you started
>
> http://www.mirandabanda.org/cogblog/about-cog/
>
>
>
> michel sangala wrote
> > Good morning, i want to know all about pharo'VM, books and notes, i also
> > want to know differences between pharo'VM and JavaVM, thanks a lot
>
>
At its most concise:
* #become:
* resumable exceptions
* message passing
* its just an execution engine

The links below expand on these, except the last which I'll expand on
briefly.

IIUC, the JVM class libraries are often considered part of the VM.  With
Smalltalk, the class libraries are part of *your* Image, written in
Smalltalk (you have direct access to understanding and debugging them in
the context of your running application).  The Pharo VM provides only:
* bytecode interpreter
* JIT bytecode to machine code compilation
* memory allocation
* primitives hiding platform differences
* primitives accelerating speed sensitive activities


https://gbracha.blogspot.com.au/2009/07/miracle-of-become.html

http://stackoverflow.com/questions/18231382/java-equivalent-of-smalltalks-become


http://forum.world.st/Debugging-in-Production-Servers-tp4756136p4756337.html

http://scg.unibe.ch/archive/papers/Vran12a.pdf

http://swing.fit.cvut.cz/projects/stx/doc/online/english/programming/stForJavaGuys.html

https://pdfs.semanticscholar.org/a0e2/5003010f1e2e3af958208ac9a540c8c7bc4b.pdf

http://stackoverflow.com/questions/3102695/what-are-the-key-differences-between-oo-in-smalltalk-and-java

http://stackoverflow.com/questions/5638052/is-it-really-all-about-message-passing-in-smalltalk/5638259

http://softwareengineering.stackexchange.com/questions/140602/what-is-message-passing-in-oo

https://www.quora.com/What-is-the-difference-between-message-passing-versus-calling-a-function-method-invocation


btw, note that the Pharo VM is a branding of the OpenSmalltalk-VM,
   https://github.com/OpenSmalltalk/opensmalltalk-vm
which is the original Squeak-VM renamed, since there are now several
downstream consumers: Pharo, Squeak, Cuis & Newspeak.


cheers -ben

P.S. just an aside for anyone unfamiliar with reading Smalltalk syntax...
http://www2.ing.unipi.it/~a009435/issw/extra/readingSmalltalk.pdf
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