JvCreateJavaVM evil segfault

[Andrew Haley <aph at redhat dot com>]

Andrew Shuttlewood writes:
 > I'm trying to integrate libgcj into an application we're writing, and
 > I've hit a nasty problem with trying to create the VM. In a standard
 > alone test app (the one somewhere on gcc.gnu.org), it works fine. It's
 > fine and dandy. When I put it as the first line in main() of our normal
 > code, however, it fails unpleasantly with a segfault.
 > 
 > For some reason gdb is totally unhelpful (it seems to get further
 > sometimes, and not so far other times), but it's dying around line 582
 > of natRuntime.cc (this worked out primarily through stepping through.
 > 
 > It explodes somewhere within the GC allocator, but the lines leading up
 > to it are:
 > 
 > 454         if (++size > threshold)
 > (gdb)
 > 461         e = new HashEntry(key, value);
 > (gdb)
 >  (this is in hashtable).
 > 
 > I'm not quite sure exactly why it appears to hate me so much, but I'm
 > willing to help perform any debugging or rebuilding necessary. This is
 > with gcc-3.3 CVS, pulled about 2-3 days ago (and I have the same problem
 > of stack traces not working for native code, but I have absolutely no
 > clue how to fix that....)

gcj on both 3.3 branch and trunk is unstable.  Please try with a
release version.

Andrew.