llvm dev - Apr 2014 - [LLVMdev] Using StartJnjvmWithJIT from jnjvm.cpp in VMKit

Hi
       Does anybody use *StartJnjvmWithJIT* from jvjvm.cpp in VMKit? 
Becuase , I am looking to use without JIT when we are running the Java 
byte code. My concern is StartJnjvmWithJIT getting three argument *int 
argc, char** argv, char* mainClass* -  why we need to pass *argv and 
mainclass* arguments here?


please help me on this.

Regards
Sri.
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Hi,

Basically, generateMain (JavaAOTCompiler.cpp) generate the C main
function when you compile a Java application with the AOT. And
generateMain invokes the main of the Java application, which is fixed
during the compilation: this main class is simply the main method of
the Main-Class of the jar file (or an argument that you give through
the command line when you invoke the AOT compiler). After, at runtime,
when you invoke the main of the Java application, you have to fill the
arguments of the Java application, and they are given through the
command line. To summarize, the main function looks like this:


int main(int argc, char** argv) {
  StartJnjvmWithJIT(argc, argv,
"TheMainClassOfTheCompiledApplication");
}

argc and argv are the arguments given at runtime, the main class is
the argument of the AOT compiler.

Gaël




2014-04-07 0:22 GMT+02:00 Sri <emdcdeveloper at
gmail.com>:
> Hi
>       Does anybody use StartJnjvmWithJIT from jvjvm.cpp in VMKit? Becuase ,
> I am looking to use without JIT when we are running the Java byte code. My
> concern is StartJnjvmWithJIT getting three argument int argc, char** argv,
> char* mainClass -  why we need to pass  argv and mainclass arguments here?
>
>
> please help me on this.
>
> Regards
> Sri.
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>


-- 
-------------------------------------------------------------------
Gaël Thomas, Associate Professor, UPMC
http://pagesperso-systeme.lip6.fr/Gael.Thomas/
-------------------------------------------------------------------

Hi Gael
           Thank you for your clarification. I have generated .bc from 
vmjc by giving java byte code ,  now generated .bc having 
StartJnjvmWithoutJIT function. So , I write a simple application as you 
mentioned and passed the mainclass as "HelloWorld" and argv is nothing
since my java program not taking any arguments. I am getting following error
*j3: JavaRuntimeJIT.cpp:381: void *j3ResolveVirtualStub(j3::JavaObject 
*): Assertion `FI->Metadata != __null && "Wrong stack
trace"' failed.**
**Aborted (core dumped)*
Am I missing anything here.

Thanks

Regards
Sri.

On 04/07/2014 09:30 AM, Gaël Thomas wrote:
> Hi,
>
> Basically, generateMain (JavaAOTCompiler.cpp) generate the C main
> function when you compile a Java application with the AOT. And
> generateMain invokes the main of the Java application, which is fixed
> during the compilation: this main class is simply the main method of
> the Main-Class of the jar file (or an argument that you give through
> the command line when you invoke the AOT compiler). After, at runtime,
> when you invoke the main of the Java application, you have to fill the
> arguments of the Java application, and they are given through the
> command line. To summarize, the main function looks like this:
>
>
> int main(int argc, char** argv) {
>    StartJnjvmWithJIT(argc, argv,
"TheMainClassOfTheCompiledApplication");
> }
>
> argc and argv are the arguments given at runtime, the main class is
> the argument of the AOT compiler.
>
> Gaël
>
>
>
>
> 2014-04-07 0:22 GMT+02:00 Sri <emdcdeveloper at gmail.com>:
>> Hi
>>        Does anybody use StartJnjvmWithJIT from jvjvm.cpp in VMKit?
Becuase ,
>> I am looking to use without JIT when we are running the Java byte code.
My
>> concern is StartJnjvmWithJIT getting three argument int argc, char**
argv,
>> char* mainClass -  why we need to pass  argv and mainclass arguments
here?
>>
>>
>> please help me on this.
>>
>> Regards
>> Sri.
>>
>> _______________________________________________
>> 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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