[llvm-dev] LLVM 10 ORC2 issue with symbol resolution

[Dibyendu Majumdar via llvm-dev]

Hi Lang,


> > Can you share the specific errors that you're getting back? I would recommend replacing
> >
> > cantFail(callToFailingFunc(...));
> >
> > with
> >
> > logAllUnhandledErrors(callToFailingFunc(...), errs(), "callToFailingFunc(...) failed:");
> >
>
> Okay thank you - I will do that and report back.


I had a look - to be honest I am not sure where the error is being
reported from. It looks like this:

JIT session error: Symbols not found: [ luaV_tointeger_, luaG_runerror ]

I don't think it is from any logging I am doing.

>
> > On Mon, Apr 13, 2020 at 10:06 AM Dibyendu Majumdar <mobile at majumdar.org.uk> wrote:
> >>
> >> Hi,
> >>
> >> I updated my project to LLVM 10.0 today and I am getting JIT symbol
> >> resolution errors.
> >> I could not find any example or updated tutorial or documentation that
> >> describes the new api - as all documentation seems out of date.
> >>
> >> I paste below some code snippets that show what I am doing:
> >>
> >> /* global syms is a array mapping names to function addresses */
> >>
> >> ES->createJITDylib("<main>");
> >> MainJD = ES->getJITDylibByName("<main>");
> >> MainJD->addGenerator(
> >>     cantFail(llvm::orc::DynamicLibrarySearchGenerator::GetForCurrentProcess(
> >>         DL->getGlobalPrefix())));
> >> auto &JD = *MainJD;
> >> llvm::orc::MangleAndInterner mangle(*ES, *this->DL);
> >> llvm::orc::SymbolMap Symbols;
> >> for (int i = 0; global_syms[i].name != nullptr; i++) {
> >>   Symbols.insert({mangle(global_syms[i].name),
> >>
> >> llvm::JITEvaluatedSymbol(llvm::pointerToJITTargetAddress(global_syms[i].address),
> >>
> >> llvm::JITSymbolFlags(llvm::JITSymbolFlags::FlagNames::Absolute))});
> >> }
> >> llvm::cantFail(JD.define(llvm::orc::absoluteSymbols(Symbols)), "Failed
> >> to install extern symbols");
> >>
> >> FYI - my previous post on similar issue.
> >> Basically I haven't been able to get ORC v2 working - tried in 8, 9 and now 10.
> >>
> >> http://llvm.1065342.n5.nabble.com/llvm-dev-ORC-v2-question-tp130489p130601.html
> >>
> >> Thanks and Regards
> >> Dibyendu