New Cog VMs available

[Eliot Miranda]

... at http://www.mirandabanda.org/files/Cog/VM/VM.r3364

CogVM binaries as per VMMaker.oscog-eem.1331/r3364

General:

Merge with Pharo (with VMMaker.oscog-EstebanLorenzano.1322).  Changes are null

to Squeak VM.  Pulled in are conditionally compiled changes for directory &

file creation (added ceration permissions) and to macro used to read image

file (for iPhone).

Cogit:

Test the outerContext and method for sanity in the machine code closure value

primitive(s).  Spur must check to fail in the presence of forwarders.

To support the primitive provide TstCqR support on x86 (already exists on ARM),

and use it to implement genJumpImmediate: et al.

Use the new genJumpImmediate: et al in various basic access primitives.  Good

for a 5%-10% increase in 0 tinyBenchmarks on Spur.

Guard access to the inline cache tag in PICs in

GC routines by inlineCacheTagsMayBeObjects.

Spur:

Spur must follow forwarders in machine code before it follows forwarders in

stack pages (since stack page parsing examines methods).

Further, closed PICs that refer to unmarked objects must be discarded in

freeUnmarkedMachineCode.  And closedPICRefersToUnmarkedObject: should guard

against an immediate selector.

-- 

best,

Eliot

[Eliot Miranda]

... at http://www.mirandabanda.org/files/Cog/VM/VM.r3365

CogVM source as per VMMaker.oscog-eem.1332/r3365

Newspeak Cogit:

Fix the regression in implicit receiver sends caused by VMMaker.oscog-eem.1317

(fix to performance regression caused by using XCHG on x86).

The implicit receiver cache uses SendNumArgsReg to refer to the cache object.

Hence we must use TempReg for genPushRegisterArgsForNumArgs: in this case.

So refactor to genPushRegisterArgsForNumArgs:scratchReg:, passing either

TempReg or SendNumArgsReg as approprate.

--

best,

Eliot