Re: [rvm-research] Resolving External References

And I also checked the the methods have proper definitions in sys.h.
What I did actually, is that I checked existing system calls, and made sure
the new system calls I have similar declarations in files as the existing
ones but without avail.



On Mon, Dec 4, 2017 at 6:54 PM, Khaled Z Mahmoud <[email protected]>
wrote:

> Hi,
>
> This error is printed when building the bootloader. I am actually using
> the system call mechanism (Not JNI ... Sorry about that). I seem to have
> all what is mentioned in the documentation of the "
> http://www.jikesrvm.org/JavaDoc/org/jikesrvm/runtime/SysCall.html"
> documentation especially the following point : "There must be a matching
> field NAMEIP in BootRecord.java for each method declared here."
>
> However, I looked at the *.exp files, and that does not reveal a lot about
> the format. It seems that functions I want inside the "/tools/bootImageRunner/sys.C"
> are not seen and that causes the build error.
>
>
>
>
> On Mon, Dec 4, 2017 at 4:19 PM, Erik Brangs <[email protected]> wrote:
>
>> Hi,
>>
>> On 04.12.2017 19:32, Khaled Z Mahmoud wrote:
>> > I think this is not a difficult question. We have some modifications to
>> JikesRVM and we do place calls to C code via JNI.
>>
>> Normal JNI should work out of the box. If you want to call C code without
>> the overhead of JNI, you can use the syscall mechanism.
>>
>> > When I compile, I receive the following error:
>> >
>> >
>> > /home/*maikon*/jikes/jikesrvm/target/FullAdaptiveMarkSweep_x86_64-linux/libjvm.so:
>> undefined reference to `SetPackageTimeWindowLimit'
>> >
>> >
>> > I am now using the latest version of JikesRVM. I know the so files that
>> contain these functions. How shall I resolve this error ?
>>
>> Problems with undefined references might be caused by missing definitions
>> in header files or missing symbol exports. You can look at sys.c for header
>> problems. The build expects exported symbols for the shared libraries to be
>> defined explicitly. You can find the definitions in the *.exp files in the
>> bootloader directory and its subdirectories (e.g. libjvm.exp).
>>
>>
>> Kind regards,
>>
>> Erik Brangs
>>
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>
>
>
> --
> Regards,
> Khaled Mahmoud
>



-- 
Regards,
Khaled Mahmoud

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