[LLVMdev] How to run vmjc created .bc files?

[Michael Wu]

Hi,

    I've managed to compile it the class down to a native executable. 
However, the executable runs for a while then spits out:

terminate called without an active exception
Aborted

and dies.

The program never gets to the normal output.

Here is a stack trace from gdb:

#0  0xf3f6baa6 in raise () from /lib/libc.so.6
#1  0xf3f6d3a8 in abort () from /lib/libc.so.6
#2  0xf41918f8 in __gnu_cxx::__verbose_terminate_handler () from 
/usr/lib/libstdc++.so.6
#3  0xf418f7d5 in ?? () from /usr/lib/libstdc++.so.6
#4  0xf418f812 in std::terminate () from /usr/lib/libstdc++.so.6
#5  0xf418f94a in __cxa_throw () from /usr/lib/libstdc++.so.6
#6  0x0806d4d0 in jnjvm::JavaThread::throwPendingException ()
#7  0x0808c118 in jnjvm::JavaMethod::invokeJavaObjectStaticAP ()
#8  0x0808c2ba in jnjvm::JavaMethod::invokeJavaObjectStatic ()
#9  0x0806e3a0 in jnjvm::Jnjvm::loadAppClassLoader ()
#10 0x08072488 in jnjvm::Jnjvm::loadBootstrap ()
#11 0x080725e5 in jnjvm::Jnjvm::mainJavaStart ()
#12 0x080b2556 in mvm::Thread::internalThreadStart ()
#13 0xf408dfc0 in start_thread () from /lib/libpthread.so.0
#14 0xf4011e7e in clone () from /lib/libc.so.6

The java file itself is very simple:

public class NumProcs {

    /**
     * Displays the number of processors available in the Java Virtual 
Machine
     */
    public static void main(String[] args) {
        Runtime runtime = Runtime.getRuntime();

        int nrOfProcessors = runtime.availableProcessors();

        System.out.println("Number of processors available to the Java 
Virtual Machine: " + nrOfProcessors);
    }
}

I just updated to the latest revision in svn.

Michael

nicolas geoffray wrote:
> Hi Michael,
>
>
> On Tue, Dec 8, 2009 at 6:26 PM, Michael Wu <mmwu at princeton.edu 
> <mailto:mmwu at princeton.edu>> wrote:
>
>     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.
>
>
> OK.
>  
>
>
>     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?
>
>
> -lgc is for the boehmgc in case you configured vmkit to use it. Since 
> you don't need it (vmkit uses its own gc by default), you should 
> change the tools/llcj/llcj.cpp file, remove the line with "-lgc" and 
> recompile it. Yes, it's _that_ of a new feature yet :)
>
>
>     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?
>
>
> No, but you can create a big .jar file containing all the class files 
> you need.
>  
>
>     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/
>
>
> Add it to the big .jar file.
>  
>
>     Of course, I'm not sure JnJvm supports multiple cores, but this is
>     more a proof of concept than anything.
>
>
> OK, if it has native functions, chances are jnjvm does not implement them.
>  
>
>     Should I just insert the necessary classes into glibj.zip and
>     recompile libvmjc.so?
>
>
> You can do that, or just insert them to your .jar file. 
>
> Cheers,
> Nicolas
>  
>
>     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>
>         <mailto: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
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