[LLVMdev] simple way to print disassembly of final code from jit?

[Reid Kleckner]

If you're on a recent flavor of Linux, you may be able to just go into
gdb and type "disas <pointer-to-JITed-code>".  More detail here:
http://llvm.org/docs/DebuggingJITedCode.html

If you still want to do it programmatically, I think you might be
stuck.  IIRC the length known by the JIT memory allocator is an
overestimate (it's rounded up for alignment), so the disassembler will
hit garbage at the end.

Reid

On Tue, Jul 6, 2010 at 3:07 PM, Bill O'Hara <billtohara at gmail.com> wrote:
> Hi,
>
> With the new llvm-mc code for disassembling, what is the recommended
> way to disassemble the final code produced by a JIT compiler backend?
> (Eg. in the toy.cpp example from the tutorial).
>
> I can get the void* for the final code, but I don't know its length -
> superficially at least it appears I need to know the length to
> disassemble it as a buffer?
>
> Thanks
> b.
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