[LLVMdev] Implementing the MC-JIT execution path for ELF, with debugging

[Ralf Karrenberg]

Hi Eli,

This is GREAT news!
So finally there will be JIT support for AVX machines on Linux, thank 
you so much! :)

Cheers,
Ralf


On 1/9/12 4:07 PM, Bendersky, Eli wrote:
> Hello,
>
> I’m part of a team at Intel that works on implementing the MC-JIT
> execution path for ELF objects with built-in support for debugging the
> JITted code with GDB. We currently have a working implementation passing
> all ExecutionEngine tests on MC-JIT for ELF, as well as several
> proprietary workloads. The current implementation focuses on Linux,
> although with some trivial modifications it can also be made to work on
> Windows (pending on some changes to Triple, as discussed in this thread:
> http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-January/046583.html).
>
> I was granted “commit after approval” rights to the repo by Chris
> Lattner, and will start delivering patches to llvm-commits today. To
> make the review process manageable, we intend to split the patches into
> a few incremental parts:
>
> 1.Modifications (more precisely, extension) to ELFObjectFile (from
> libObject) to support dynamic loading
>
> 2.Implementation of MC-JIT for ELF, including a new RuntimeDyldELF class
> (that parallels the existing RuntimeDyldMachO) which implements the
> dynamic loading of the ELF image into memory, its relocation and execution.
>
> 3.An implementation of a MC-JIT – GDB bridge which allows to fully debug
> the JITted code with GDB.
>
> These patches will be a superset of an earlier patch sent by Daniel
> Malea
> (http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20111219/133702.html).
>
> We’ll be very happy to have the patches reviewed, and see a functional
> MC-JIT implementation for ELF in LLVM trunk soon.
>
> Eli
>
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