Re: [rvm-research] Jikes Runtime Exception

Hi,

I am speculating that maybe the C Code I am calling is corrupting the
memory of the JVM.
Since these are different languages different memory managers are involved.
I am basically just using PAPI Library for performance counter monitoring
using Overflow mechanism.


On Fri, Mar 9, 2018 at 4:52 AM, Erik Brangs <[email protected]> wrote:

> Hi,
>
> On 08.03.2018 21:55, Khaled Z Mahmoud wrote:
> > Any ideas on how to trace ?
>
> This kind of failure generally occurs when a hardware exception occurs at
> a place where the opt compiler doesn't expect it. You can see from the
> stack trace that the method is opt-compiled (because OptCompiledMethod is
> queried for uninterruptibility).
>
> The relevant line is the one before the hardware trap:
>
> > (0x6211d610 22614)   at [0x6211d610, 0x64c12a26] Lorg/jikesrvm/scheduler/RVMThread;
> <init>([BLjava/lang/Thread;Ljava/lang/String;ZLorg/jikesrvm/scheduler/SystemThread;I)V
> at machine code offset 0x000007e4
>
> One of the instructions in the machine code of the method around offset
> 0x000007e4 is failing with a hardware exception but the originating
> bytecode cannot throw such an exception at this place. IIRC the actual
> location should be in the range of +/- 1 instructions if it's not the exact
> one.
>
> You can try to debug this problem by looking at the generated machine
> code. The code could be printed out with the appropriate commandline
> options but for constructors you're probably better off modifying the
> compilers to print out the desired method regardless of options. For
> classes that are in the boot image, compilation will be trigged by the boot
> image writer, so you'd have to look at its output in the target directory
> of the appropriate image ( e.g. target/development_x86_64-
> linux/BootImageWriterOutput.txt ).
>
>
> Kind regards,
>
> Erik Brangs
>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Jikesrvm-researchers mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/jikesrvm-researchers
>



-- 
Regards,
Khaled Mahmoud

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot

_______________________________________________
Jikesrvm-researchers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/jikesrvm-researchers