[LLVMdev] MC-JIT Design

[Olivier Meurant]

2010/11/15 Török Edwin <edwintorok at gmail.com>

> >
> > The pros and cons we discussed:
> >
> > Pro:
> >  - We reuse all existing MC output functionality.
> >  - We have a shorter path to working well with the external system
> > tools (the real runtime linker, the debugger, the unwinder).
> >
> > Cons:
> >  - Requires developing good object file libraries for LLVM. This is
> > also a pro, as it coalesces work other people (Michael Spencer, Nick
> > Kledzik) are already interested in doing.
> >  - Means JIT is slightly more platform dependent, as the runtime
> > linker could have ELF or Mach-O specific bugs that wouldn't show up on
> > another platform.
>
>
> Don't forget PE (or is it pecoff?), otherwise JIT won't work on win32.
> But what does the obj format has to do with the JIT?
> Sure for debug info its good to have an ELF around to give to gdb, but
> otherwise can't you just emit the code to memory, with a small header
> to keep info you need, and thats it?
>
>
If I understand correctly, the idea is to use native platform format (ELF,
Mach-O, COFF...) even when emitting code in memory for the JIT.
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