Where do i find information regarding ObjectScript Internals (LLVM? interpreted?)

Question

Question

Frank Langel · Mar 29, 2020

#Compiler #ObjectScript #Health Connect #InterSystems IRIS #InterSystems IRIS for Health

Hi, please let me know where i find details on Objectscript internal implementation - is it an interpreted language ? - compiled into binary code (how - which compiler/toolchain ?) ? - support of LLVM ? thanks a lot Frank

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Julius Kavay · Mar 29, 2020

as far as I know (subject to verification) you source code will be compiled into a p-code (pseudo- or portable-code). This means, Cache and IRIS behave (regarding program execution) as virtual machines, like the JVM (Java Virtual Machine).

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Robert Cemper · Mar 29, 2020

@Julius Kavay is fully correct.

The compiler was first written ~10 years before the idea of LLVM started @ University of Illinois.
Various interfaces allow your development very close to the data store.

I'd suggest you contact your Sales Engineer @ InterSystems (Darmstadt ?) for disclosure of internals.

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score 0 · Answer 1 · 2020-03-29T12:48:26-04:00

It's a proprietary compiler compiling into a proprietary bytecode. So no llvm support, and certainly no in depth documentation of it ;)

score 0 · Answer 2 · 2024-05-07T15:54:01-04:00

Classes (which are high level) are converted to INT modules. INT and MAC files are compiled into OBJ. This is binary data (similar to Java bytecode) that will be interpreted using some kind of virtual machine/interpreter. A "+" sign appears in Studio when the modified date of a MAC or INT module is different than the related OBJ.

You can take a look at ^rMAC, ^rOBJ and ^ROUTINE globals for more details.