[LLVMdev] Interpreter with multiple modules.

[James Williams]

On 3 February 2010 14:13, Garrison Venn <gvenn.cfe.dev at gmail.com> wrote:

> I have not used the C api or the interpreter, but via JIT one can use
> ExecutionEngine::addGlobalMapping(...) after the function decl in the
> foreign module. See if there is an equivalent in the C API, which will
> probably work for the interpreter given that this method is declared in
> ExecutionEngine. Also search for a previous email thread in this list.
> This discussion was fairly recent, and I believe I responded to it.
>

This is interesting. I've just implemented dynamic loading of bitcode
modules into lli for my project. I did this by hacking lli using the Linker
class. Is ExecutionEngine::addGlobalMapping() preferred for this purpose?

-- James

>
> Hope this helps
>
> Garrison
>
> On Feb 3, 2010, at 8:53, Thomas W. wrote:
>
> >
> > Hi everybody,
> >
> > I'm currently working with LLVM (v 2.6) and I try to interpret LLVM
> bitcode
> > using the c API. Here is my problem : I have two LLVMModuleRef, M1 and
> M2,
> > M1 contains the function "funct()" and M2 contains a main function which
> > call "funct()" (M2 declares "funct()" too but it doesn't define it). If I
> > try to run the main function, I got the error "LLVM ERROR: Tried to
> execute
> > unknown external function: ...".
> >
> > I build the interpreter giving it M1 and then I add M2. I can use the
> > LLVMFindFunction(...) to get the functions "funct()" and "main()" and if
> I
> > apply LLVMIsDeclaration(...) to these LLVMValueRef, I got false (so the
> > interpreter should know the two functions are defined and it should be
> able
> > to find their code).
> >
> > Is there something to do to enable the interpreter to find a function in
> > another module ? I saw there is something like
> LLVMLinker::LinkModules(...)
> > in c++ but I didn't find the c version of this function.
> >
> > Thanks in advance for your help,
> >
> > Thomas.
> > --
> > View this message in context:
> http://old.nabble.com/Interpreter-with-multiple-modules.-tp27433312p27433312.html
> > Sent from the LLVM - Dev mailing list archive at Nabble.com.
> >
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