coro patch issue

[John Rose]

On May 11, 2010, at 7:45 AM, Tuolin Chen wrote:

> I'm new to mlvm and I'm trying to get Lukas' coro.patch to work.
> 
> I grabbed the source and patches according to openjdk and mlvm build instructions. Everything is done on my laptop running Ubuntu 10.04 64bit version. Only coro patch is applied. Though it didn't apply cleanly with latest code base, the issue is minor and I fixed it by some trivial editing on the patch.

Unless you are attempting a forward-port, the patches should only be attempted with the micro-version mentioned in the series file (patches/hotspot/series).  Currently that is 88f9b6ef43ff.  Is that the base you are starting with?

> The patched sources compiled fine, but generated a error when yielding to coroutine:
> 
> # To suppress the following error report, specify this argument
> # after -XX: or in .hotspotrc:  SuppressErrorAt=/unsafe.cpp:1229
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> #  Internal Error (/home/tuolin/Projs/davinci/sources/hotspot/src/share/vm/prims/unsafe.cpp:1229), pid=9191, tid=140737353991952
> #  Error: assert(current != __null,"NULL current coroutine in prepareSwitch")
> 
> While debugging, the data does not appear to be corrupted. I also checked the sources, but failed to see the appropriate modification.
> 
> Any help is greatly appreciated! 

If you are starting with the right base revision, this sounds like a question for Lukas.

Best wishes,
-- John