New Cog VMs available

[Eliot Miranda]

at http://www.mirandabanda.org/files/Cog/VM/VM.r3236/

CogVM binaries as per VMMaker.oscog-eem.1029/r3236

Fix stupid, stupid bug in copying vm profile samples between buffers when the

circular buffer index has wrapped.

Fix monumental blunder in jitted store-check code.  The saved registers mask

needs to be the *or* of the value reg and the caller-saved registers, not the

*and*!!

Make the pin primitives Spur-only.

Never inline mapStackPages, for debugging.

Spur:

Reduce the max num literals in the alternate header format to 15, and steal

the bit for the Sista optimized method flag.

Make postBecomeAction's stack sweep only occur in Spur (fix regression).

Refactor so that the scan is not inlined. Don't assume newMethod is

non-immediate in post-become actions.

Fix stack adjust slip in primitiveSmallFloatTimesTwoPower

Make ensureBehaviorHash: fail for uninitialized

behaviours and hence fix the Behavior basicNew basicNew hang.

Optionalize some api methods the Spur Cogit doesn't use.

Rename and correct ensureSemaphoreForwardedThroughContext: to

ensureSemaphoreUnforwardedThroughContext:, its intended function.

Make shouldRemapObj: filter-out objects already in newSpace

since mapStackPages, via mapInterpreterOops, can visit objects

twice in a scavenge, GC, compact sequence.

Make sure the caller (& saved) context(s) in base frames stack page are

followed post-become in followForwardingPointersInStackZone:.

Fix bad bug introduced in become changes in  VMMaker.oscog-eem.841 through 844.

The class table contains puns, e.g. using Array and WeakArray.  These class

index puns must not mislead the allInstances primitive into concluding that

the class in question is at multiple indices and wrongly purge it.

Fix slip in primitivePin. Also be lenient w.r.t. unpinning married contexts.

Move the check down into StackInterpreter's version.  This allows e.g.

    self allObjectsDo: [:o| o unpin]

Bow to the inevitable and add a manual override for primitive accessor depth.

Use it in at: & at:put:.  If manual override is not used then the automatically

computed depth is too deep because of context access.

Newspeak:

Integrate Ryan's newer absent receiver sends, which first apeared in

VMMaker.oscog-eem.919, abandoned because of Glue issues now resolved.  Includes

nice refactoring of absent send argument marshalling into its own routine.

LargeIntegersPlugin:

Remove/fix assumption of 32-bit digit length in normalization routines.

--

best,

Eliot

[Ryan Macnak]

Boot images starting at 2015-01-29 will require upgrading to these VMs.