[LLVMdev] FW: How to debug jit code

[James Molloy]

Woops, forgot to reply to the list too. 

> Hi,
> 
> Have you read this page? http://llvm.org/docs/DebuggingJITedCode.html
> 
> It contains pretty much what you're asking - it uses a command-line
> switch to lli as opposed to the C++ interface, but if you're using
> llvm::cl for options processing you get that flag automatically (try
> ./your_tool --help | grep jit-emit-debug).
> 
> With that flag enabled you should just be able to run the task under
> GDB and it "just work". In theory :)
> 
> Cheers,
> 
> James
> 
> > -----Original Message-----
> > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-
> bounces at cs.uiuc.edu]
> > On Behalf Of KULBHUSHAN PACHAURI
> > Sent: 08 October 2010 08:45
> > To: llvmdev at cs.uiuc.edu
> > Subject: [LLVMdev] How to debug jit code
> >
> > Hi,
> >
> > Can anyone tell me how can i debug jit code in this scenario..
> >
> > Let say i have one file foo.c with two function foo1 and foo2.
> >
> > file: foo.c
> >
> > int foo1(int in)
> > {
> >    return in%64;
> > }
> >
> > float foo2(float in)
> > {
> >    return in/foo1((int)in);
> > }
> >
> > i generate llvm bytecode (ir) using llvm-gcc --emit-llvm -c ..
> >
> > In test application:
> >
> > load this .bc and create module , and replace function argument with
> > contant val.. and call getpointertofunction.. and when i am using
> this
> > function pointer i am getting segfault...
> >
> > So please tell me if there is a way to debug this..
> >
> > Thanks in advance.
> >
> > Regards,
> > Pachauri
> >
> >
> >
> >
> >
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> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
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