GC latency in GCJ

[Andrew Haley]

Boehm, Hans writes:
 > 
 > It used to be that if you built libgcj with --enable-gc-debug, the
 > collector would write an abbreviated stack trace in each object,
 > and you could use that for some low-tech heap profiling, etc.  I
 > believe that still works at the GC level, but I'm not sure the gcj
 > infrastructure still works.  I haven't tried it very recently.

I tried --enable-gc-debug recently, and it still works.  I didn't try
backtrace, but I'm sure that works too.

Andrew.