On 5/23/2012 20:51, Eliot Miranda wrote:
> So given that the Interpreter VM now supports the mirror primitives,
> does anyone object if I add the debugger changes to trunk that use the
> mirror primitives and hence make accurate debugging of proxies possible?
> The downside of doing this is that the debugger will be broken on
> older VMs.

It should be possible to write the mirror prims relatively safely, e.g.:

object: anObject instVarAt: anIndex
	"Primitive. Answer a fixed variable in an object. The numbering of the
	variables corresponds to the named instance variables. Fail if the index
	is not an Integer or is not the index of a fixed variable. Essential 
for the
	debugger. See  Object documentation whatIsAPrimitive."

	<primitive: 73>
	anIndex <= (self objectClass: anObject) instSize
		ifTrue:["Assume mirror primitives are missing"
			^anObject instVarAt: index]
		ifFalse:["Access beyond fixed variables."
			^self object: anObject basicAt: anIndex - (self objectClass: 
anObject) instSize].



Cheers,
   - Andreas