llvm dev - Dec 2009 - [LLVMdev] How to run vmjc created .bc files?

Hi,

    What do I need to link with vmjc created .bc files to actually run 
the .bc file? I tried running with lli but only got:
LLVM ERROR: Program used external function 'StartJnjvmWithoutJIT' which 
could not be resolved!

Thanks,
Michael

Hi Michael,

Currently, you can run vmjc created .bc files by statically linking them
with all the .o needed files. For that, you can use the llcj tool, which
works more or less like GCC's gcj tool.

Note that you also need to create the libvmjc.so file, which contains the
standard library in native form. Do a make in the tools/vmjc/libvmjc
directory. Once this is done, update the LD_LIBRARY_PATH shell variable to
contain this file, and update PATH to contain the llvm tools and the vmkit
tools. You will then be able to use llcj.

Let me know if that helped. I will write a more detailed howto on vmkit's
website in a few days.

Nicolas

On Sun, Dec 6, 2009 at 10:07 PM, Michael Wu <mmwu at princeton.edu> wrote:
> Hi,
>
>    What do I need to link with vmjc created .bc files to actually run
> the .bc file? I tried running with lli but only got:
> LLVM ERROR: Program used external function 'StartJnjvmWithoutJIT'
which
> could not be resolved!
>
> Thanks,
> Michael
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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Hi,

    Thanks a lot for the help! I am getting some errors though:

I am on a 32 bit chroot on a x86_64 system. Thus llc guesses the wrong 
architecture from the module bitcode and spits out x86_64 assembly. I 
fixed this by adding "-march=x86" to the llc options in llcj.

gcc doesn't know what -lgc is. I'm guessing it is the garbage collection
library. How can I get it or point gcc to the right library?

llcj -mem2reg MemberVar.class
/usr/bin/ld: cannot find -lgc
collect2: ld returned 1 exit status

If I have class files that depends on other class files, will llcj be 
able to find those and compile them into the executable as well?

Also, I have an addition to the Java standard library backported from 
Java 7, which is necessary for my project. JSR166: 
http://gee.cs.oswego.edu/dl/concurrency-interest/

Of course, I'm not sure JnJvm supports multiple cores, but this is more 
a proof of concept than anything.

Should I just insert the necessary classes into glibj.zip and recompile 
libvmjc.so?

Thanks,
Michael

nicolas geoffray wrote:
> Hi Michael,
>
> Currently, you can run vmjc created .bc files by statically linking 
> them with all the .o needed files. For that, you can use the llcj 
> tool, which works more or less like GCC's gcj tool.
>
> Note that you also need to create the libvmjc.so file, which contains 
> the standard library in native form. Do a make in the 
> tools/vmjc/libvmjc directory. Once this is done, update the 
> LD_LIBRARY_PATH shell variable to contain this file, and update PATH 
> to contain the llvm tools and the vmkit tools. You will then be able 
> to use llcj.
>
> Let me know if that helped. I will write a more detailed howto on 
> vmkit's website in a few days.
>
> Nicolas
>
> On Sun, Dec 6, 2009 at 10:07 PM, Michael Wu <mmwu at princeton.edu 
> <mailto:mmwu at princeton.edu>> wrote:
>
>     Hi,
>
>        What do I need to link with vmjc created .bc files to actually run
>     the .bc file? I tried running with lli but only got:
>     LLVM ERROR: Program used external function
'StartJnjvmWithoutJIT'
>     which
>     could not be resolved!
>
>     Thanks,
>     Michael
>     _______________________________________________
>     LLVM Developers mailing list
>     LLVMdev at cs.uiuc.edu <mailto:LLVMdev at cs.uiuc.edu>        
>     http://llvm.cs.uiuc.edu
>     http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>