Here's copy of my Skype comments to you, FTR. — John
Great slide deck!
Error on slide 12: invokespecial *has* a receiver. While I'm tweaking, I
suppose you could say "single dispatch (via table)" vs. "single dispatch (via
search)", but that's a matter of debate.
Slide 13: optional static arguments are probably TMI on the first slide showing
a BSM; they might confuse people into thinking they are dynamic (normal)
arguments. Suggest a slide 13.5 which introduces static and dynamic arguments
at the same time.
Slide 49: /vmindex from symbolic link/s/link/reference/ ("symbolic link" is not
a spec. term)
Slide 54: The javadoc is messy; you quote it correctly. But, while prim/ref
conversion is casting (5.5), it is *also* assignment (5.2); the non-error
actions are the same in the prim/ref case. (MHs.explicitCastArguments uses
additional types of casting.) I think the only reason we mention 5.5 here
instead of 5.2 is an accident during spec creation; we may have briefly an
erroneous ref-to-ref cast after the boxing operation. Probably it's worth a
footnote, saying something like "assignment (5.2)* ... *spec says casting
(5.5) which mandates the same behavior for the prim/ref case".
Slide 64: Informative rendering of an LF to bytecodes. Wouldn't it be cool to
have have a slide 64.5 of a representative MH compiled to MH-customized native
code... (That opens up the whole big question of share-vs-customized, but
still would be nice to see object code.)
Slide 78: invokeExact_000_MT should renumber the temps; you apparently inserted
a2/a3 but did not change t2/t3 to t4/t5.
Slide 85: s/invokeGeneric linkage/invokeExact linkage/ (there is no
invokeGeneric in the spec, though there was at one point)
I really like the Grand Plan slide!
Slides 86-89: You have just C frames, which don't give enough context.
Suggest appending younger frames to the stack trace.
86 -> MHN.linkCallSite -> MHN.linkCallSiteImpl -> CallSite.makeSite ->
MH.invoke (on BSM)
87 -> MHN.linkMethodImpl -> Invokers.methodHandleInvokeLinkerMethod ->
Invokers.invokeHandleForm (cf. MethodHandles.exactInvoker)
88 -> Lookup.linkMethodHandleConstant -> MHs.getDirectMethodForConstant ->
MHs.getDirectMethodNoSecurityManager -> getDirectMethodCommon (cf.
Lookup.findVirtual)
89 -> MHN.findMethodHandleType -> MethodType.makeImpl (cf.
MethodType.methodType)
Slide 90: Maybe give a use case for each annotation?
@Hidden : MethodHandleImpl.guardWithCatch
@ForceInline : DirectMethodHandle.internalMemberName
@DontInline : LambdaForm.interpretWithArguments
@Compiled : output of InvokerBytecodeGenerator.generateCustomizedCode
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