Re: LLVM JITLink attempt II (WIP)

On Sat, Jan 3, 2026 at 4:09 PM Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
> I still don't know how to enable GDB and Perf support with JITLink...

jit_debugging_support may just be just a matter of calling
LLVMOrcLLJITEnableDebugSupport()[1], though it looks like it might
only work for ELF (the other interesting object format at this stage
being macOS's MachO, and in the past/possible future AIX's COFF/XCOFF
and eventually Windows COFF/PE), but I'm not sure. You can tell if
it's working by making it crash/abort in JITed code and seeing if the
stack is decodable by GDB I had been thinking we were going to have
to write that function because I'd missed its arrival in LLVM 18[2],
d'uh. It sounds like we might need to wait for or write a similar
function for perf support. Sorry for drip-feeding incomplete work,
but since others expressed an interest in helping :-)

[1] https://github.com/llvm/llvm-project/issues/174305#issuecomment-3709546309
[2] https://github.com/llvm/llvm-project/commit/54397f9ac128568838f2ac7bfc8e1f94b3eb264d