[Vm-dev] Re: New Cog VMs available

[Eliot Miranda]

On Thu, Feb 25, 2016 at 9:29 AM, Eliot Miranda <eliot.miranda at gmail.com>
wrote:

> ... at http://www.mirandabanda.org/files/Cog/VM/VM.r3632.
>
> These include 64-bit VMs whose Smalltalk execution and FFI are
> functional.  However, their SocketPlugin is more than somewhat broken.
> Executing the SocketPlugin tests results in a hard lockup, at least on Mac
> OS X.  This is my next focus for 64-bits.
>

It turns out that the 64-bit socket issues are Mac OS only.  The linux
64-bit VMs seem to be fine.  The problems are to do with socket reuse
and/or broadcast (SO_REUSEADDR, SO_REUSEPORT & SO_BROADCAST).

>
> ------------------------------------------------------------------------
> CogVM binaries as per VMMaker.oscog-eem.1700/r3632
>
> General:
> Fix serious bug in jitted perform: primitive.  Thanks to Stephane Rollandin
> for finding and to Levente Uzoni for diagnosing the bug.  If the argument
> count is one greater than the max number of register arguments (2 in Spur,
> hence perform:with:with:) then the code to remove the receiver and
> arguments
> from the stack neglects to remove the receiver and selector.
>
> Spur:
> Fix special selector arithmetic and comparison in the 64-bit Cogit.  My
> original
> code for genJumpNotSmallIntegersIn:andScratchReg: merely jumped if the tags
> differed, hence not jumping if both arguments were SmallFloat64s (or both
> Characters).  The new code requires an additional scratch register;
> hence add genJumpNotSmallIntegersIn:andScratch:scratch:.
>
> Fix bug in markAndTraceWeaklingsFrom:.  Fields of weaklings may be
> immediate
> so must use followOopField:ofObject: not followObjField:ofObject:.
>
> Fix
> https://pharo.fogbugz.com/f/cases/17536/VM-Crash-when-adding-an-iVar-to-a-subclass-of-SystemAnnouncement
> .
>
> When weaklings (and when ephemerons) are scan-marked forwarders must be
> coped
> with.
>
> 64-bit VMs:
> Fix a bug in printHex: for 64-bits (faulty arithmetic).
>
> ThreadedFFIPlugin:
> Fix the remaining 64-bit issues in the ThreadedFFIPlugin.  The
> X64SysVFFIPlugin
> now passes the test suite.  Hence include the FFI plugin in 64-bit VMs.
>
> Make the SqueakFFIPrims plugin internal in the Mac pharo builds.
>
> Mac VMs:
> Have the Mac OS X build install Localizable.strings.  Add versions for
> Newspeak, Pharo and Squeak.  Rename the key to SelectImagePanePrompt.
> Temporarily disable the Serial plugin in the Pharo Mac VM until we can
> track
> down the relevant platforms/iOS support for the Pharo extensions.
>
> Fix argument access on the iOS platform (Mac OS VMs).
>
> _,,,^..^,,,_
> best, Eliot
>



-- 
_,,,^..^,,,_
best, Eliot
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