[Jikesrvm-researchers] Operands for Call.create

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Hi,
I'm trying to instrument Jikes by inserting calls to various places. I ne=
ed to pass some strings to the Call.createX (X =3D 1, 2, ...) so that it =
gets passed to the static method that I haved declared in VM_Entrypoints.=

How do I do that? The last several parameters of Call.createX takes an OP=
T_Operand. If I have a String (just a local variable in the method - or a=
 string constant), what do I need to do to get it correctly passed to the=
 static method? There's something call OPT_StringConstantOperand that tak=
es a string and an offset to create an OPT_STringConstantOperand. If this=
 is the proper way, how do I know the offset of a local/temporary variabl=
e?
This is probably something very simple, but I have looked around and have=
nt found the answer yet
Thanks,
~Anh